/* Everything about breakpoints, for GDB.
- Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+ Copyright 1986, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
+ Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-#include <stdio.h>
#include "defs.h"
-#include "param.h"
+#include <ctype.h>
#include "symtab.h"
#include "frame.h"
+#include "breakpoint.h"
+#include "gdbtypes.h"
+#include "expression.h"
+#include "gdbcore.h"
+#include "gdbcmd.h"
+#include "value.h"
+#include "command.h"
+#include "inferior.h"
+#include "gdbthread.h"
+#include "target.h"
+#include "language.h"
+#include "gdb_string.h"
+#include "demangle.h"
+#include "annotate.h"
+#include "symfile.h"
+#include "objfiles.h"
+
+/* Prototypes for local functions. */
-/* This is the sequence of bytes we insert for a breakpoint. */
-
-static char break_insn[] = BREAKPOINT;
-
-/* States of enablement of breakpoint.
- `temporary' means disable when hit.
- `delete' means delete when hit. */
-
-enum enable { disabled, enabled, temporary, delete};
-
-/* Not that the ->silent field is not currently used by any commands
- (though the code is in there if it was to be and set_raw_breakpoint
- does set it to 0). I implemented it because I thought it would be
- useful for a hack I had to put in; I'm going to leave it in because
- I can see how there might be times when it would indeed be useful */
-
-struct breakpoint
-{
- struct breakpoint *next;
- /* Number assigned to distinguish breakpoints. */
- int number;
- /* Address to break at. */
- CORE_ADDR address;
- /* Line number of this address. Redundant. */
- int line_number;
- /* Symtab of file of this address. Redundant. */
- struct symtab *symtab;
- /* Zero means disabled; remember the info but don't break here. */
- enum enable enable;
- /* Non-zero means a silent breakpoint (don't print frame info
- if we stop here). */
- unsigned char silent;
- /* Number of stops at this breakpoint that should
- be continued automatically before really stopping. */
- int ignore_count;
- /* "Real" contents of byte where breakpoint has been inserted.
- Valid only when breakpoints are in the program. */
- char shadow_contents[sizeof break_insn];
- /* Nonzero if this breakpoint is now inserted. */
- char inserted;
- /* Nonzero if this is not the first breakpoint in the list
- for the given address. */
- char duplicate;
- /* Chain of command lines to execute when this breakpoint is hit. */
- struct command_line *commands;
- /* Stack depth (address of frame). If nonzero, break only if fp
- equals this. */
- FRAME_ADDR frame;
- /* Conditional. Break only if this expression's value is nonzero. */
- struct expression *cond;
-};
+static void
+catch_command_1 PARAMS ((char *, int, int));
+
+static void
+enable_delete_command PARAMS ((char *, int));
+
+static void
+enable_delete_breakpoint PARAMS ((struct breakpoint *));
+
+static void
+enable_once_command PARAMS ((char *, int));
+
+static void
+enable_once_breakpoint PARAMS ((struct breakpoint *));
+
+static void
+disable_command PARAMS ((char *, int));
+
+static void
+enable_command PARAMS ((char *, int));
+
+static void
+map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *)));
+
+static void
+ignore_command PARAMS ((char *, int));
+
+static int breakpoint_re_set_one PARAMS ((PTR));
+
+static void
+clear_command PARAMS ((char *, int));
+
+static void
+catch_command PARAMS ((char *, int));
+
+static void
+handle_gnu_4_16_catch_command PARAMS ((char *, int, int));
+
+static struct symtabs_and_lines
+get_catch_sals PARAMS ((int));
+
+static void
+watch_command PARAMS ((char *, int));
+
+static int
+can_use_hardware_watchpoint PARAMS ((struct value *));
+
+void
+tbreak_command PARAMS ((char *, int));
+
+static void
+break_command_1 PARAMS ((char *, int, int));
+
+static void
+mention PARAMS ((struct breakpoint *));
+
+struct breakpoint *
+set_raw_breakpoint PARAMS ((struct symtab_and_line));
+
+static void
+check_duplicates PARAMS ((CORE_ADDR, asection *));
+
+static void
+describe_other_breakpoints PARAMS ((CORE_ADDR, asection *));
+
+static void
+breakpoints_info PARAMS ((char *, int));
+
+static void
+breakpoint_1 PARAMS ((int, int));
+
+static bpstat
+bpstat_alloc PARAMS ((struct breakpoint *, bpstat));
+
+static int breakpoint_cond_eval PARAMS ((PTR));
+
+static void
+cleanup_executing_breakpoints PARAMS ((PTR));
+
+static void
+commands_command PARAMS ((char *, int));
+
+static void
+condition_command PARAMS ((char *, int));
+
+static int
+get_number PARAMS ((char **));
+
+void
+set_breakpoint_count PARAMS ((int));
+
+#if 0
+static struct breakpoint *
+create_temp_exception_breakpoint PARAMS ((CORE_ADDR));
+#endif
+
+typedef enum {
+ mark_inserted,
+ mark_uninserted,
+} insertion_state_t;
+
+static int
+remove_breakpoint PARAMS ((struct breakpoint *, insertion_state_t));
+
+static int print_it_normal PARAMS ((bpstat));
+
+typedef struct {
+ enum exception_event_kind kind;
+ int enable;
+} args_for_catchpoint_enable;
+
+static int watchpoint_check PARAMS ((PTR));
+
+static int cover_target_enable_exception_callback PARAMS ((PTR));
+
+static int print_it_done PARAMS ((bpstat));
+
+static int print_it_noop PARAMS ((bpstat));
+
+static void maintenance_info_breakpoints PARAMS ((char *, int));
+
+#ifdef GET_LONGJMP_TARGET
+static void create_longjmp_breakpoint PARAMS ((char *));
+#endif
+
+static int hw_breakpoint_used_count PARAMS ((void));
+
+static int hw_watchpoint_used_count PARAMS ((enum bptype, int *));
+
+static void hbreak_command PARAMS ((char *, int));
+
+static void thbreak_command PARAMS ((char *, int));
+
+static void watch_command_1 PARAMS ((char *, int, int));
+
+static void rwatch_command PARAMS ((char *, int));
+
+static void awatch_command PARAMS ((char *, int));
+
+static void do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp));
+
+/* Prototypes for exported functions. */
+
+static void
+awatch_command PARAMS ((char *, int));
+
+static void
+do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp));
+
+/* If FALSE, gdb will not use hardware support for watchpoints, even
+ if such is available. */
+static int can_use_hw_watchpoints;
+
+void delete_command PARAMS ((char *, int));
+
+void _initialize_breakpoint PARAMS ((void));
+
+void set_breakpoint_count PARAMS ((int));
+
+extern int addressprint; /* Print machine addresses? */
+
+#if defined (GET_LONGJMP_TARGET) || defined (SOLIB_ADD)
+static int internal_breakpoint_number = -1;
+#endif
+
+/* Are we executing breakpoint commands? */
+static int executing_breakpoint_commands;
+
+/* Walk the following statement or block through all breakpoints.
+ ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
+ breakpoint. */
#define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next)
+#define ALL_BREAKPOINTS_SAFE(b,tmp) \
+ for (b = breakpoint_chain; \
+ b? (tmp=b->next, 1): 0; \
+ b = tmp)
+
+/* True if SHIFT_INST_REGS defined, false otherwise. */
+
+int must_shift_inst_regs =
+#if defined(SHIFT_INST_REGS)
+1
+#else
+0
+#endif
+;
+
+/* True if breakpoint hit counts should be displayed in breakpoint info. */
+
+int show_breakpoint_hit_counts = 1;
+
/* Chain of all breakpoints defined. */
struct breakpoint *breakpoint_chain;
/* Number of last breakpoint made. */
-static int breakpoint_count;
+int breakpoint_count;
+
+/* Pointer to current exception event record */
+static struct exception_event_record * current_exception_event;
+
+/* Indicator of whether exception catchpoints should be nuked
+ between runs of a program */
+int exception_catchpoints_are_fragile = 0;
+
+/* Indicator of when exception catchpoints set-up should be
+ reinitialized -- e.g. when program is re-run */
+int exception_support_initialized = 0;
+
+
+/* Set breakpoint count to NUM. */
+
+void
+set_breakpoint_count (num)
+ int num;
+{
+ breakpoint_count = num;
+ set_internalvar (lookup_internalvar ("bpnum"),
+ value_from_longest (builtin_type_int, (LONGEST) num));
+}
+
+/* Used in run_command to zero the hit count when a new run starts. */
+
+void
+clear_breakpoint_hit_counts ()
+{
+ struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ b->hit_count = 0;
+}
/* Default address, symtab and line to put a breakpoint at
for "break" command with no arg.
CORE_ADDR default_breakpoint_address;
struct symtab *default_breakpoint_symtab;
int default_breakpoint_line;
+\f
+/* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
+ Advance *PP after the string and any trailing whitespace.
+
+ Currently the string can either be a number or "$" followed by the name
+ of a convenience variable. Making it an expression wouldn't work well
+ for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */
+static int
+get_number (pp)
+ char **pp;
+{
+ int retval;
+ char *p = *pp;
-/* Remaining commands (not yet executed)
- of last breakpoint hit. */
-
-struct command_line *breakpoint_commands;
-
-static void delete_breakpoint ();
-void clear_momentary_breakpoints ();
-void breakpoint_auto_delete ();
-
-/* Flag indicating extra verbosity for xgdb. */
-extern int xgdb_verbose;
+ if (p == NULL)
+ /* Empty line means refer to the last breakpoint. */
+ return breakpoint_count;
+ else if (*p == '$')
+ {
+ /* Make a copy of the name, so we can null-terminate it
+ to pass to lookup_internalvar(). */
+ char *varname;
+ char *start = ++p;
+ value_ptr val;
+
+ while (isalnum (*p) || *p == '_')
+ p++;
+ varname = (char *) alloca (p - start + 1);
+ strncpy (varname, start, p - start);
+ varname[p - start] = '\0';
+ val = value_of_internalvar (lookup_internalvar (varname));
+ if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT)
+ error (
+"Convenience variables used to specify breakpoints must have integer values."
+ );
+ retval = (int) value_as_long (val);
+ }
+ else
+ {
+ if (*p == '-')
+ ++p;
+ while (*p >= '0' && *p <= '9')
+ ++p;
+ if (p == *pp)
+ /* There is no number here. (e.g. "cond a == b"). */
+ error_no_arg ("breakpoint number");
+ retval = atoi (*pp);
+ }
+ if (!(isspace (*p) || *p == '\0'))
+ error ("breakpoint number expected");
+ while (isspace (*p))
+ p++;
+ *pp = p;
+ return retval;
+}
\f
/* condition N EXP -- set break condition of breakpoint N to EXP. */
int from_tty;
{
register struct breakpoint *b;
- register char *p;
+ char *p;
register int bnum;
- register struct expression *expr;
if (arg == 0)
error_no_arg ("breakpoint number");
p = arg;
- while (*p >= '0' && *p <= '9') p++;
- if (p == arg)
- /* There is no number here. (e.g. "cond a == b"). */
- error_no_arg ("breakpoint number");
- bnum = atoi (arg);
+ bnum = get_number (&p);
ALL_BREAKPOINTS (b)
if (b->number == bnum)
{
if (b->cond)
- free (b->cond);
+ {
+ free ((PTR)b->cond);
+ b->cond = 0;
+ }
+ if (b->cond_string != NULL)
+ free ((PTR)b->cond_string);
+
if (*p == 0)
{
b->cond = 0;
+ b->cond_string = NULL;
if (from_tty)
- printf ("Breakpoint %d now unconditional.\n", bnum);
+ printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
}
else
{
- if (*p != ' ' && *p != '\t')
- error ("Arguments must be an integer (breakpoint number) and an expression.");
-
- /* Find start of expression */
- while (*p == ' ' || *p == '\t') p++;
-
arg = p;
- b->cond = (struct expression *) parse_c_1 (&arg, block_for_pc (b->address), 0);
+ /* I don't know if it matters whether this is the string the user
+ typed in or the decompiled expression. */
+ b->cond_string = savestring (arg, strlen (arg));
+ b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
if (*arg)
error ("Junk at end of expression");
}
+ breakpoints_changed ();
return;
}
error ("No breakpoint number %d.", bnum);
}
+/* ARGSUSED */
static void
-commands_command (arg)
+commands_command (arg, from_tty)
char *arg;
+ int from_tty;
{
register struct breakpoint *b;
- register char *p, *p1;
+ char *p;
register int bnum;
struct command_line *l;
free the storage, if we change the commands currently
being read from. */
- if (breakpoint_commands)
+ if (executing_breakpoint_commands)
error ("Can't use the \"commands\" command among a breakpoint's commands.");
- /* Allow commands by itself to refer to the last breakpoint. */
- if (arg == 0)
- bnum = breakpoint_count;
- else
- {
- p = arg;
- if (! (*p >= '0' && *p <= '9'))
- error ("Argument must be integer (a breakpoint number).");
-
- while (*p >= '0' && *p <= '9') p++;
- if (*p)
- error ("Unexpected extra arguments following breakpoint number.");
+ p = arg;
+ bnum = get_number (&p);
+ if (p && *p)
+ error ("Unexpected extra arguments following breakpoint number.");
- bnum = atoi (arg);
- }
-
ALL_BREAKPOINTS (b)
if (b->number == bnum)
{
- if (input_from_terminal_p ())
- {
- printf ("Type commands for when breakpoint %d is hit, one per line.\n\
-End with a line saying just \"end\".\n", bnum);
- fflush (stdout);
- }
- l = read_command_lines ();
+ char tmpbuf[128];
+ sprintf (tmpbuf, "Type commands for when breakpoint %d is hit, one per line.", bnum);
+ l = read_command_lines (tmpbuf, from_tty);
free_command_lines (&b->commands);
b->commands = l;
+ breakpoints_changed ();
return;
}
error ("No breakpoint number %d.", bnum);
}
+\f
+/* Like target_read_memory() but if breakpoints are inserted, return
+ the shadow contents instead of the breakpoints themselves.
-/* Called from command loop to execute the commands
- associated with the breakpoint we just stopped at. */
+ Read "memory data" from whatever target or inferior we have.
+ Returns zero if successful, errno value if not. EIO is used
+ for address out of bounds. If breakpoints are inserted, returns
+ shadow contents, not the breakpoints themselves. From breakpoint.c. */
-void
-do_breakpoint_commands ()
+int
+read_memory_nobpt (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ unsigned len;
{
- while (breakpoint_commands)
+ int status;
+ struct breakpoint *b;
+ CORE_ADDR bp_addr = 0;
+ int bp_size = 0;
+
+ if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
+ /* No breakpoints on this machine. */
+ return target_read_memory (memaddr, myaddr, len);
+
+ ALL_BREAKPOINTS (b)
{
- char *line = breakpoint_commands->line;
- breakpoint_commands = breakpoint_commands->next;
- execute_command (line, 0);
- /* If command was "cont", breakpoint_commands is now 0,
- of if we stopped at yet another breakpoint which has commands,
- it is now the commands for the new breakpoint. */
+ if (b->type == bp_none)
+ warning ("attempted to read through apparently deleted breakpoint #%d?\n", b->number);
+
+ /* memory breakpoint? */
+ if (b->type == bp_watchpoint
+ || b->type == bp_hardware_watchpoint
+ || b->type == bp_read_watchpoint
+ || b->type == bp_access_watchpoint)
+ continue;
+ /* bp in memory? */
+ if (!b->inserted)
+ continue;
+ /* Addresses and length of the part of the breakpoint that
+ we need to copy. */
+ /* XXXX The m68k, sh and h8300 have different local and remote
+ breakpoint values. BREAKPOINT_FROM_PC still manages to
+ correctly determine the breakpoints memory address and size
+ for these targets. */
+ bp_addr = b->address;
+ bp_size = 0;
+ if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
+ continue;
+ if (bp_size == 0)
+ /* bp isn't valid */
+ continue;
+ if (bp_addr + bp_size <= memaddr)
+ /* The breakpoint is entirely before the chunk of memory we
+ are reading. */
+ continue;
+ if (bp_addr >= memaddr + len)
+ /* The breakpoint is entirely after the chunk of memory we are
+ reading. */
+ continue;
+ /* Copy the breakpoint from the shadow contents, and recurse for
+ the things before and after. */
+ {
+ /* Offset within shadow_contents. */
+ int bptoffset = 0;
+
+ if (bp_addr < memaddr)
+ {
+ /* Only copy the second part of the breakpoint. */
+ bp_size -= memaddr - bp_addr;
+ bptoffset = memaddr - bp_addr;
+ bp_addr = memaddr;
+ }
+
+ if (bp_addr + bp_size > memaddr + len)
+ {
+ /* Only copy the first part of the breakpoint. */
+ bp_size -= (bp_addr + bp_size) - (memaddr + len);
+ }
+
+ memcpy (myaddr + bp_addr - memaddr,
+ b->shadow_contents + bptoffset, bp_size);
+
+ if (bp_addr > memaddr)
+ {
+ /* Copy the section of memory before the breakpoint. */
+ status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
+ if (status != 0)
+ return status;
+ }
+
+ if (bp_addr + bp_size < memaddr + len)
+ {
+ /* Copy the section of memory after the breakpoint. */
+ status = read_memory_nobpt
+ (bp_addr + bp_size,
+ myaddr + bp_addr + bp_size - memaddr,
+ memaddr + len - (bp_addr + bp_size));
+ if (status != 0)
+ return status;
+ }
+ return 0;
+ }
}
- clear_momentary_breakpoints ();
-}
-
-/* Used when the program is proceeded, to eliminate any remaining
- commands attached to the previous breakpoint we stopped at. */
-
-void
-clear_breakpoint_commands ()
-{
- breakpoint_commands = 0;
- breakpoint_auto_delete (0);
-}
-
-/* Functions to get and set the current list of pending
- breakpoint commands. These are used by run_stack_dummy
- to preserve the commands around a function call. */
-
-struct command_line *
-get_breakpoint_commands ()
-{
- return breakpoint_commands;
+ /* Nothing overlaps. Just call read_memory_noerr. */
+ return target_read_memory (memaddr, myaddr, len);
}
-void
-set_breakpoint_commands (cmds)
- struct command_line *cmds;
-{
- breakpoint_commands = cmds;
-}
\f
/* insert_breakpoints is used when starting or continuing the program.
remove_breakpoints is used when the program stops.
int
insert_breakpoints ()
{
- register struct breakpoint *b;
- int val;
+ register struct breakpoint *b, *temp;
+ int val = 0;
+ int disabled_breaks = 0;
-#ifdef BREAKPOINT_DEBUG
- printf ("Inserting breakpoints.\n");
-#endif /* BREAKPOINT_DEBUG */
+ static char message1[] = "Error inserting catchpoint %d:\n";
+ static char message[sizeof (message1) + 30];
+
+
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ if (b->type != bp_watchpoint
+ && b->type != bp_hardware_watchpoint
+ && b->type != bp_read_watchpoint
+ && b->type != bp_access_watchpoint
+ && b->type != bp_catch_fork
+ && b->type != bp_catch_vfork
+ && b->type != bp_catch_exec
+ && b->type != bp_catch_throw
+ && b->type != bp_catch_catch
+ && b->enable != disabled
+ && b->enable != shlib_disabled
+ && b->enable != call_disabled
+ && ! b->inserted
+ && ! b->duplicate)
+ {
+ if (b->type == bp_hardware_breakpoint)
+ val = target_insert_hw_breakpoint(b->address, b->shadow_contents);
+ else
+ {
+ /* Check to see if breakpoint is in an overlay section;
+ if so, we should set the breakpoint at the LMA address.
+ Only if the section is currently mapped should we ALSO
+ set a break at the VMA address. */
+ if (overlay_debugging && b->section &&
+ section_is_overlay (b->section))
+ {
+ CORE_ADDR addr;
+
+ addr = overlay_unmapped_address (b->address, b->section);
+ val = target_insert_breakpoint (addr, b->shadow_contents);
+ /* This would be the time to check val, to see if the
+ breakpoint write to the load address succeeded.
+ However, this might be an ordinary occurrance, eg. if
+ the unmapped overlay is in ROM. */
+ val = 0; /* in case unmapped address failed */
+ if (section_is_mapped (b->section))
+ val = target_insert_breakpoint (b->address,
+ b->shadow_contents);
+ }
+ else /* ordinary (non-overlay) address */
+ val = target_insert_breakpoint(b->address, b->shadow_contents);
+ }
+ if (val)
+ {
+ /* Can't set the breakpoint. */
+#if defined (DISABLE_UNSETTABLE_BREAK)
+ if (DISABLE_UNSETTABLE_BREAK (b->address))
+ {
+ /* See also: disable_breakpoints_in_shlibs. */
+ val = 0;
+ b->enable = shlib_disabled;
+ if (!disabled_breaks)
+ {
+ target_terminal_ours_for_output ();
+ fprintf_unfiltered (gdb_stderr,
+ "Cannot insert breakpoint %d:\n", b->number);
+ printf_filtered ("Temporarily disabling shared library breakpoints:\n");
+ }
+ disabled_breaks = 1;
+ printf_filtered ("%d ", b->number);
+ }
+ else
+#endif
+ {
+ target_terminal_ours_for_output ();
+ fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number);
+#ifdef ONE_PROCESS_WRITETEXT
+ fprintf_unfiltered (gdb_stderr,
+ "The same program may be running in another process.\n");
+#endif
+ memory_error (val, b->address); /* which bombs us out */
+ }
+ }
+ else
+ b->inserted = 1;
+ }
+ else if (ep_is_exception_catchpoint (b)
+ && b->enable != disabled
+ && b->enable != shlib_disabled
+ && b->enable != call_disabled
+ && ! b->inserted
+ && ! b->duplicate)
- ALL_BREAKPOINTS (b)
- if (b->enable != disabled && ! b->inserted && ! b->duplicate)
{
- read_memory (b->address, b->shadow_contents, sizeof break_insn);
- val = write_memory (b->address, break_insn, sizeof break_insn);
- if (val)
- return val;
-#ifdef BREAKPOINT_DEBUG
- printf ("Inserted breakpoint at 0x%x, shadow 0x%x, 0x%x.\n",
- b->address, b->shadow_contents[0], b->shadow_contents[1]);
-#endif /* BREAKPOINT_DEBUG */
- b->inserted = 1;
+ /* If we get here, we must have a callback mechanism for exception
+ events -- with g++ style embedded label support, we insert
+ ordinary breakpoints and not catchpoints. */
+ sprintf (message, message1, b->number); /* Format possible error message */
+
+ val = target_insert_breakpoint(b->address, b->shadow_contents);
+ if (val)
+ {
+ /* Couldn't set breakpoint for some reason */
+ target_terminal_ours_for_output ();
+ fprintf_unfiltered (gdb_stderr,
+ "Cannot insert catchpoint %d; disabling it\n", b->number);
+ b->enable = disabled;
+ }
+ else
+ {
+ /* Bp set, now make sure callbacks are enabled */
+ int val;
+ args_for_catchpoint_enable args;
+ args.kind = b->type == bp_catch_catch ? EX_EVENT_CATCH : EX_EVENT_THROW;
+ args.enable = 1;
+ val = catch_errors (cover_target_enable_exception_callback,
+ &args,
+ message, RETURN_MASK_ALL);
+ if (val != 0 && val != -1)
+ {
+ b->inserted = 1;
+ }
+ /* Check if something went wrong; val == 0 can be ignored */
+ if (val == -1)
+ {
+ /* something went wrong */
+ target_terminal_ours_for_output ();
+ fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d; disabling it\n", b->number);
+ b->enable = disabled;
+ }
+ }
}
- return 0;
+
+ else if ((b->type == bp_hardware_watchpoint ||
+ b->type == bp_read_watchpoint ||
+ b->type == bp_access_watchpoint)
+ && b->enable == enabled
+ && ! b->inserted
+ && ! b->duplicate)
+ {
+ struct frame_info *saved_frame;
+ int saved_level, within_current_scope;
+ value_ptr mark = value_mark ();
+ value_ptr v;
+
+ /* Save the current frame and level so we can restore it after
+ evaluating the watchpoint expression on its own frame. */
+ saved_frame = selected_frame;
+ saved_level = selected_frame_level;
+
+ /* Determine if the watchpoint is within scope. */
+ if (b->exp_valid_block == NULL)
+ within_current_scope = 1;
+ else
+ {
+ struct frame_info *fi;
+
+ /* There might be no current frame at this moment if we are
+ resuming from a step over a breakpoint.
+ Set up current frame before trying to find the watchpoint
+ frame. */
+ get_current_frame ();
+ fi = find_frame_addr_in_frame_chain (b->watchpoint_frame);
+ within_current_scope = (fi != NULL);
+ if (within_current_scope)
+ select_frame (fi, -1);
+ }
+
+ if (within_current_scope)
+ {
+ /* Evaluate the expression and cut the chain of values
+ produced off from the value chain. */
+ v = evaluate_expression (b->exp);
+ value_release_to_mark (mark);
+
+ b->val_chain = v;
+ b->inserted = 1;
+
+ /* Look at each value on the value chain. */
+ for ( ; v; v=v->next)
+ {
+ /* If it's a memory location, then we must watch it. */
+ if (v->lval == lval_memory)
+ {
+ int addr, len, type;
+
+ addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
+ len = TYPE_LENGTH (VALUE_TYPE (v));
+ type = 0;
+ if (b->type == bp_read_watchpoint)
+ type = 1;
+ else if (b->type == bp_access_watchpoint)
+ type = 2;
+
+ val = target_insert_watchpoint (addr, len, type);
+ if (val == -1)
+ {
+ b->inserted = 0;
+ break;
+ }
+ val = 0;
+ }
+ }
+ /* Failure to insert a watchpoint on any memory value in the
+ value chain brings us here. */
+ if (!b->inserted)
+ warning ("Hardware watchpoint %d: Could not insert watchpoint\n",
+ b->number);
+ }
+ else
+ {
+ printf_filtered ("\
+Hardware watchpoint %d deleted because the program has left the block in\n\
+which its expression is valid.\n", b->number);
+ if (b->related_breakpoint)
+ b->related_breakpoint->disposition = del_at_next_stop;
+ b->disposition = del_at_next_stop;
+ }
+
+ /* Restore the frame and level. */
+ if ((saved_frame != selected_frame) ||
+ (saved_level != selected_frame_level))
+ select_and_print_frame (saved_frame, saved_level);
+ }
+ else if ((b->type == bp_catch_fork
+ || b->type == bp_catch_vfork
+ || b->type == bp_catch_exec)
+ && b->enable == enabled
+ && ! b->inserted
+ && ! b->duplicate)
+ {
+ val = -1;
+ switch (b->type)
+ {
+ case bp_catch_fork :
+ val = target_insert_fork_catchpoint (inferior_pid);
+ break;
+ case bp_catch_vfork :
+ val = target_insert_vfork_catchpoint (inferior_pid);
+ break;
+ case bp_catch_exec :
+ val = target_insert_exec_catchpoint (inferior_pid);
+ break;
+ }
+ if (val < 0)
+ {
+ target_terminal_ours_for_output ();
+ fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d:\n", b->number);
+ }
+ else
+ b->inserted = 1;
+ }
+ }
+ if (disabled_breaks)
+ printf_filtered ("\n");
+
+ return val;
}
+
int
remove_breakpoints ()
{
register struct breakpoint *b;
int val;
-#ifdef BREAKPOINT_DEBUG
- printf ("Removing breakpoints.\n");
-#endif /* BREAKPOINT_DEBUG */
-
ALL_BREAKPOINTS (b)
- if (b->inserted)
- {
- val = write_memory (b->address, b->shadow_contents, sizeof break_insn);
- if (val)
- return val;
- b->inserted = 0;
-#ifdef BREAKPOINT_DEBUG
- printf ("Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n",
- b->address, b->shadow_contents[0], b->shadow_contents[1]);
-#endif /* BREAKPOINT_DEBUG */
- }
-
+ {
+ if (b->inserted)
+ {
+ val = remove_breakpoint (b, mark_uninserted);
+ if (val != 0)
+ return val;
+ }
+ }
return 0;
}
-/* Clear the "inserted" flag in all breakpoints.
- This is done when the inferior is loaded. */
-
-void
-mark_breakpoints_out ()
+int
+reattach_breakpoints (pid)
+ int pid;
{
register struct breakpoint *b;
+ int val;
+ int saved_inferior_pid = inferior_pid;
+ inferior_pid = pid; /* Because remove_breakpoint will use this global. */
ALL_BREAKPOINTS (b)
- b->inserted = 0;
+ {
+ if (b->inserted)
+ {
+ remove_breakpoint (b, mark_inserted);
+ if (b->type == bp_hardware_breakpoint)
+ val = target_insert_hw_breakpoint(b->address, b->shadow_contents);
+ else
+ val = target_insert_breakpoint(b->address, b->shadow_contents);
+ if (val != 0)
+ {
+ inferior_pid = saved_inferior_pid;
+ return val;
+ }
+ }
+ }
+ inferior_pid = saved_inferior_pid;
+ return 0;
}
-/* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC.
- When continuing from a location with a breakpoint,
- we actually single step once before calling insert_breakpoints. */
-
-int
-breakpoint_here_p (pc)
- CORE_ADDR pc;
+void
+update_breakpoints_after_exec ()
{
- register struct breakpoint *b;
+ struct breakpoint * b;
+ struct breakpoint * temp;
- ALL_BREAKPOINTS (b)
- if (b->enable != disabled && b->address == pc)
- return 1;
+ /* Doing this first prevents the badness of having delete_breakpoint()
+ write a breakpoint's current "shadow contents" to lift the bp. That
+ shadow is NOT valid after an exec()! */
+ mark_breakpoints_out ();
- return 0;
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ /* Solib breakpoints must be explicitly reset after an exec(). */
+ if (b->type == bp_shlib_event)
+ {
+ delete_breakpoint (b);
+ continue;
+ }
+
+ /* Step-resume breakpoints are meaningless after an exec(). */
+ if (b->type == bp_step_resume)
+ {
+ delete_breakpoint (b);
+ continue;
+ }
+
+ /* Ditto the sigtramp handler breakpoints. */
+ if (b->type == bp_through_sigtramp)
+ {
+ delete_breakpoint (b);
+ continue;
+ }
+
+ /* Ditto the exception-handling catchpoints. */
+ if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
+ {
+ delete_breakpoint (b);
+ continue;
+ }
+
+ /* Don't delete an exec catchpoint, because else the inferior
+ won't stop when it ought!
+
+ Similarly, we probably ought to keep vfork catchpoints, 'cause
+ on this target, we may not be able to stop when the vfork is seen,
+ but only when the subsequent exec is seen. (And because deleting
+ fork catchpoints here but not vfork catchpoints will seem mysterious
+ to users, keep those too.)
+
+ ??rehrauer: Let's hope that merely clearing out this catchpoint's
+ target address field, if any, is sufficient to have it be reset
+ automagically. Certainly on HP-UX that's true. */
+ if ((b->type == bp_catch_exec) ||
+ (b->type == bp_catch_vfork) ||
+ (b->type == bp_catch_fork))
+ {
+ b->address = (CORE_ADDR) NULL;
+ continue;
+ }
+
+ /* bp_finish is a special case. The only way we ought to be able
+ to see one of these when an exec() has happened, is if the user
+ caught a vfork, and then said "finish". Ordinarily a finish just
+ carries them to the call-site of the current callee, by setting
+ a temporary bp there and resuming. But in this case, the finish
+ will carry them entirely through the vfork & exec.
+
+ We don't want to allow a bp_finish to remain inserted now. But
+ we can't safely delete it, 'cause finish_command has a handle to
+ the bp on a bpstat, and will later want to delete it. There's a
+ chance (and I've seen it happen) that if we delete the bp_finish
+ here, that its storage will get reused by the time finish_command
+ gets 'round to deleting the "use to be a bp_finish" breakpoint.
+ We really must allow finish_command to delete a bp_finish.
+
+ In the absense of a general solution for the "how do we know it's
+ safe to delete something others may have handles to?" problem, what
+ we'll do here is just uninsert the bp_finish, and let finish_command
+ delete it.
+
+ (We know the bp_finish is "doomed" in the sense that it's momentary,
+ and will be deleted as soon as finish_command sees the inferior stopped.
+ So it doesn't matter that the bp's address is probably bogus in the
+ new a.out, unlike e.g., the solib breakpoints.) */
+ if (b->type == bp_finish)
+ {
+ continue;
+ }
+
+ /* Without a symbolic address, we have little hope of the
+ pre-exec() address meaning the same thing in the post-exec()
+ a.out. */
+ if (b->addr_string == NULL)
+ {
+ delete_breakpoint (b);
+ continue;
+ }
+
+ /* If this breakpoint has survived the above battery of checks, then
+ it must have a symbolic address. Be sure that it gets reevaluated
+ to a target address, rather than reusing the old evaluation. */
+ b->address = (CORE_ADDR) NULL;
+ }
}
-/* Evaluate the expression EXP and return 1 if value is zero.
- This is used inside a catch_errors to evaluate the breakpoint condition. */
-
int
-breakpoint_cond_eval (exp)
- struct expression *exp;
+detach_breakpoints (pid)
+ int pid;
{
- return value_zerop (evaluate_expression (exp));
+ register struct breakpoint *b;
+ int val;
+ int saved_inferior_pid = inferior_pid;
+
+ if (pid == inferior_pid)
+ error ("Cannot detach breakpoints of inferior_pid");
+
+ inferior_pid = pid; /* Because remove_breakpoint will use this global. */
+ ALL_BREAKPOINTS (b)
+ {
+ if (b->inserted)
+ {
+ val = remove_breakpoint (b, mark_inserted);
+ if (val != 0)
+ {
+ inferior_pid = saved_inferior_pid;
+ return val;
+ }
+ }
+ }
+ inferior_pid = saved_inferior_pid;
+ return 0;
}
-/* Return 0 if PC is not the address just after a breakpoint,
- or -1 if breakpoint says do not stop now,
- or -2 if breakpoint says it has deleted itself and don't stop,
- or -3 if hit a breakpoint number -3 (delete when program stops),
- or else the number of the breakpoint,
- with 0x1000000 added (or subtracted, for a negative return value) for
- a silent breakpoint. */
-
-int
-breakpoint_stop_status (pc, frame_address)
- CORE_ADDR pc;
- FRAME_ADDR frame_address;
+static int
+remove_breakpoint (b, is)
+ struct breakpoint *b;
+ insertion_state_t is;
{
- register struct breakpoint *b;
- register int cont = 0;
-
- /* Get the address where the breakpoint would have been. */
- pc -= DECR_PC_AFTER_BREAK;
-
- ALL_BREAKPOINTS (b)
- if (b->enable != disabled && b->address == pc)
- {
- if (b->frame && b->frame != frame_address)
- cont = -1;
- else
- {
- int value_zero;
- if (b->cond)
- {
- /* Need to select the frame, with all that implies
- so that the conditions will have the right context. */
- select_frame (get_current_frame (), 0);
- value_zero
- = catch_errors (breakpoint_cond_eval, b->cond,
- "Error occurred in testing breakpoint condition.");
- free_all_values ();
- }
- if (b->cond && value_zero)
- {
- cont = -1;
- }
- else if (b->ignore_count > 0)
- {
- b->ignore_count--;
- cont = -1;
- }
- else
- {
- if (b->enable == temporary)
- b->enable = disabled;
- breakpoint_commands = b->commands;
- if (b->silent
- || (breakpoint_commands
- && !strcmp ("silent", breakpoint_commands->line)))
- {
- if (breakpoint_commands)
- breakpoint_commands = breakpoint_commands->next;
- return (b->number > 0 ?
- 0x1000000 + b->number :
- b->number - 0x1000000);
- }
- return b->number;
- }
- }
+ int val;
+
+ if (b->type == bp_none)
+ warning ("attempted to remove apparently deleted breakpoint #%d?\n", b->number);
+
+ if (b->type != bp_watchpoint
+ && b->type != bp_hardware_watchpoint
+ && b->type != bp_read_watchpoint
+ && b->type != bp_access_watchpoint
+ && b->type != bp_catch_fork
+ && b->type != bp_catch_vfork
+ && b->type != bp_catch_exec
+ && b->type != bp_catch_catch
+ && b->type != bp_catch_throw)
+
+ {
+ if (b->type == bp_hardware_breakpoint)
+ val = target_remove_hw_breakpoint(b->address, b->shadow_contents);
+ else
+ {
+ /* Check to see if breakpoint is in an overlay section;
+ if so, we should remove the breakpoint at the LMA address.
+ If that is not equal to the raw address, then we should
+ presumable remove the breakpoint there as well. */
+ if (overlay_debugging && b->section &&
+ section_is_overlay (b->section))
+ {
+ CORE_ADDR addr;
+
+ addr = overlay_unmapped_address (b->address, b->section);
+ val = target_remove_breakpoint (addr, b->shadow_contents);
+ /* This would be the time to check val, to see if the
+ shadow breakpoint write to the load address succeeded.
+ However, this might be an ordinary occurrance, eg. if
+ the unmapped overlay is in ROM. */
+ val = 0; /* in case unmapped address failed */
+ if (section_is_mapped (b->section))
+ val = target_remove_breakpoint (b->address,
+ b->shadow_contents);
+ }
+ else /* ordinary (non-overlay) address */
+ val = target_remove_breakpoint(b->address, b->shadow_contents);
+ }
+ if (val)
+ return val;
+ b->inserted = (is == mark_inserted);
+ }
+ else if ((b->type == bp_hardware_watchpoint ||
+ b->type == bp_read_watchpoint ||
+ b->type == bp_access_watchpoint)
+ && b->enable == enabled
+ && ! b->duplicate)
+ {
+ value_ptr v, n;
+
+ b->inserted = (is == mark_inserted);
+ /* Walk down the saved value chain. */
+ for (v = b->val_chain; v; v = v->next)
+ {
+ /* For each memory reference remove the watchpoint
+ at that address. */
+ if (v->lval == lval_memory)
+ {
+ int addr, len, type;
+
+ addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
+ len = TYPE_LENGTH (VALUE_TYPE (v));
+ type = 0;
+ if (b->type == bp_read_watchpoint)
+ type = 1;
+ else if (b->type == bp_access_watchpoint)
+ type = 2;
+
+ val = target_remove_watchpoint (addr, len, type);
+ if (val == -1)
+ b->inserted = 1;
+ val = 0;
+ }
+ }
+ /* Failure to remove any of the hardware watchpoints comes here. */
+ if ((is == mark_uninserted) && (b->inserted))
+ warning ("Hardware watchpoint %d: Could not remove watchpoint\n",
+ b->number);
+
+ /* Free the saved value chain. We will construct a new one
+ the next time the watchpoint is inserted. */
+ for (v = b->val_chain; v; v = n)
+ {
+ n = v->next;
+ value_free (v);
+ }
+ b->val_chain = NULL;
+ }
+ else if ((b->type == bp_catch_fork ||
+ b->type == bp_catch_vfork ||
+ b->type == bp_catch_exec)
+ && b->enable == enabled
+ && ! b->duplicate)
+ {
+ val = -1;
+ switch (b->type)
+ {
+ case bp_catch_fork:
+ val = target_remove_fork_catchpoint (inferior_pid);
+ break;
+ case bp_catch_vfork :
+ val = target_remove_vfork_catchpoint (inferior_pid);
+ break;
+ case bp_catch_exec :
+ val = target_remove_exec_catchpoint (inferior_pid);
+ break;
+ }
+ if (val)
+ return val;
+ b->inserted = (is == mark_inserted);
+ }
+ else if ((b->type == bp_catch_catch ||
+ b->type == bp_catch_throw)
+ && b->enable == enabled
+ && ! b->duplicate)
+ {
+
+ val = target_remove_breakpoint(b->address, b->shadow_contents);
+ if (val)
+ return val;
+ b->inserted = (is == mark_inserted);
+ }
+ else if (ep_is_exception_catchpoint (b)
+ && b->inserted /* sometimes previous insert doesn't happen */
+ && b->enable == enabled
+ && ! b->duplicate)
+ {
+
+ val = target_remove_breakpoint(b->address, b->shadow_contents);
+ if (val)
+ return val;
+
+ b->inserted = (is == mark_inserted);
+ }
+
+ return 0;
+}
+
+/* Clear the "inserted" flag in all breakpoints. */
+
+void
+mark_breakpoints_out ()
+{
+ register struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ b->inserted = 0;
+}
+
+/* Clear the "inserted" flag in all breakpoints and delete any breakpoints
+ which should go away between runs of the program.
+
+ Plus other such housekeeping that has to be done for breakpoints
+ between runs.
+
+ Note: this function gets called at the end of a run (by generic_mourn_inferior)
+ and when a run begins (by init_wait_for_inferior). */
+
+
+
+void
+breakpoint_init_inferior (context)
+ enum inf_context context;
+{
+ register struct breakpoint *b, *temp;
+ static int warning_needed = 0;
+
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ b->inserted = 0;
+
+ switch (b->type)
+ {
+ case bp_call_dummy:
+ case bp_watchpoint_scope:
+
+ /* If the call dummy breakpoint is at the entry point it will
+ cause problems when the inferior is rerun, so we better
+ get rid of it.
+
+ Also get rid of scope breakpoints. */
+ delete_breakpoint (b);
+ break;
+
+ case bp_watchpoint:
+ case bp_hardware_watchpoint:
+ case bp_read_watchpoint:
+ case bp_access_watchpoint:
+
+ /* Likewise for watchpoints on local expressions. */
+ if (b->exp_valid_block != NULL)
+ delete_breakpoint (b);
+ break;
+ default:
+ /* Likewise for exception catchpoints in dynamic-linked
+ executables where required */
+ if (ep_is_exception_catchpoint (b) &&
+ exception_catchpoints_are_fragile)
+ {
+ warning_needed = 1;
+ delete_breakpoint (b);
+ }
+ break;
+ }
+ }
+
+ if (exception_catchpoints_are_fragile)
+ exception_support_initialized = 0;
+
+ /* Don't issue the warning unless it's really needed... */
+ if (warning_needed && (context != inf_exited))
+ {
+ warning ("Exception catchpoints from last run were deleted, you must reinsert them explicitly");
+ warning_needed = 0;
+ }
+}
+
+/* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC.
+ When continuing from a location with a breakpoint,
+ we actually single step once before calling insert_breakpoints. */
+
+int
+breakpoint_here_p (pc)
+ CORE_ADDR pc;
+{
+ register struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ if (b->enable == enabled
+ && b->enable != shlib_disabled
+ && b->enable != call_disabled
+ && b->address == pc) /* bp is enabled and matches pc */
+ {
+ if (overlay_debugging &&
+ section_is_overlay (b->section) &&
+ !section_is_mapped (b->section))
+ continue; /* unmapped overlay -- can't be a match */
+ else
+ return 1;
+ }
+
+ return 0;
+}
+
+/* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(), but it
+ only returns true if there is actually a breakpoint inserted at PC. */
+
+int
+breakpoint_inserted_here_p (pc)
+ CORE_ADDR pc;
+{
+ register struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ if (b->inserted
+ && b->address == pc) /* bp is inserted and matches pc */
+ {
+ if (overlay_debugging &&
+ section_is_overlay (b->section) &&
+ !section_is_mapped (b->section))
+ continue; /* unmapped overlay -- can't be a match */
+ else
+ return 1;
+ }
+
+ return 0;
+}
+
+/* Return nonzero if FRAME is a dummy frame. We can't use PC_IN_CALL_DUMMY
+ because figuring out the saved SP would take too much time, at least using
+ get_saved_register on the 68k. This means that for this function to
+ work right a port must use the bp_call_dummy breakpoint. */
+
+int
+frame_in_dummy (frame)
+ struct frame_info *frame;
+{
+#ifdef CALL_DUMMY
+#ifdef USE_GENERIC_DUMMY_FRAMES
+ return generic_pc_in_call_dummy (frame->pc, frame->frame);
+#else
+ struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ {
+ static ULONGEST dummy[] = CALL_DUMMY;
+
+ if (b->type == bp_call_dummy
+ && b->frame == frame->frame
+
+ /* We need to check the PC as well as the frame on the sparc,
+ for signals.exp in the testsuite. */
+ && (frame->pc
+ >= (b->address
+ - sizeof (dummy) / sizeof (LONGEST) * REGISTER_SIZE))
+ && frame->pc <= b->address)
+ return 1;
+ }
+#endif /* GENERIC_DUMMY_FRAMES */
+#endif /* CALL_DUMMY */
+ return 0;
+}
+
+/* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC
+ is valid for process/thread PID. */
+
+int
+breakpoint_thread_match (pc, pid)
+ CORE_ADDR pc;
+ int pid;
+{
+ struct breakpoint *b;
+ int thread;
+
+ thread = pid_to_thread_id (pid);
+
+ ALL_BREAKPOINTS (b)
+ if (b->enable != disabled
+ && b->enable != shlib_disabled
+ && b->enable != call_disabled
+ && b->address == pc
+ && (b->thread == -1 || b->thread == thread))
+ {
+ if (overlay_debugging &&
+ section_is_overlay (b->section) &&
+ !section_is_mapped (b->section))
+ continue; /* unmapped overlay -- can't be a match */
+ else
+ return 1;
}
- return cont;
+ return 0;
}
+
\f
+/* bpstat stuff. External routines' interfaces are documented
+ in breakpoint.h. */
+
+int
+ep_is_catchpoint (ep)
+ struct breakpoint * ep;
+{
+ return
+ (ep->type == bp_catch_load)
+ || (ep->type == bp_catch_unload)
+ || (ep->type == bp_catch_fork)
+ || (ep->type == bp_catch_vfork)
+ || (ep->type == bp_catch_exec)
+ || (ep->type == bp_catch_catch)
+ || (ep->type == bp_catch_throw)
+
+
+ /* ??rehrauer: Add more kinds here, as are implemented... */
+ ;
+}
+
+int
+ep_is_shlib_catchpoint (ep)
+ struct breakpoint * ep;
+{
+ return
+ (ep->type == bp_catch_load)
+ || (ep->type == bp_catch_unload)
+ ;
+}
+
+int
+ep_is_exception_catchpoint (ep)
+ struct breakpoint * ep;
+{
+ return
+ (ep->type == bp_catch_catch)
+ || (ep->type == bp_catch_throw)
+ ;
+}
+
+/* Clear a bpstat so that it says we are not at any breakpoint.
+ Also free any storage that is part of a bpstat. */
+
+void
+bpstat_clear (bsp)
+ bpstat *bsp;
+{
+ bpstat p;
+ bpstat q;
+
+ if (bsp == 0)
+ return;
+ p = *bsp;
+ while (p != NULL)
+ {
+ q = p->next;
+ if (p->old_val != NULL)
+ value_free (p->old_val);
+ free ((PTR)p);
+ p = q;
+ }
+ *bsp = NULL;
+}
+
+/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
+ is part of the bpstat is copied as well. */
+
+bpstat
+bpstat_copy (bs)
+ bpstat bs;
+{
+ bpstat p = NULL;
+ bpstat tmp;
+ bpstat retval = NULL;
+
+ if (bs == NULL)
+ return bs;
+
+ for (; bs != NULL; bs = bs->next)
+ {
+ tmp = (bpstat) xmalloc (sizeof (*tmp));
+ memcpy (tmp, bs, sizeof (*tmp));
+ if (p == NULL)
+ /* This is the first thing in the chain. */
+ retval = tmp;
+ else
+ p->next = tmp;
+ p = tmp;
+ }
+ p->next = NULL;
+ return retval;
+}
+
+/* Find the bpstat associated with this breakpoint */
+
+bpstat
+bpstat_find_breakpoint(bsp, breakpoint)
+ bpstat bsp;
+ struct breakpoint *breakpoint;
+{
+ if (bsp == NULL) return NULL;
+
+ for (;bsp != NULL; bsp = bsp->next) {
+ if (bsp->breakpoint_at == breakpoint) return bsp;
+ }
+ return NULL;
+}
+
+/* Find a step_resume breakpoint associated with this bpstat.
+ (If there are multiple step_resume bp's on the list, this function
+ will arbitrarily pick one.)
+
+ It is an error to use this function if BPSTAT doesn't contain a
+ step_resume breakpoint.
+
+ See wait_for_inferior's use of this function. */
+struct breakpoint *
+bpstat_find_step_resume_breakpoint (bsp)
+ bpstat bsp;
+{
+ if (bsp == NULL)
+ error ("Internal error (bpstat_find_step_resume_breakpoint)");
+
+ for (; bsp != NULL; bsp = bsp->next)
+ {
+ if ((bsp->breakpoint_at != NULL) &&
+ (bsp->breakpoint_at->type == bp_step_resume))
+ return bsp->breakpoint_at;
+ }
+
+ error ("Internal error (no step_resume breakpoint found)");
+}
+
+
+/* Return the breakpoint number of the first breakpoint we are stopped
+ at. *BSP upon return is a bpstat which points to the remaining
+ breakpoints stopped at (but which is not guaranteed to be good for
+ anything but further calls to bpstat_num).
+ Return 0 if passed a bpstat which does not indicate any breakpoints. */
+
+int
+bpstat_num (bsp)
+ bpstat *bsp;
+{
+ struct breakpoint *b;
+
+ if ((*bsp) == NULL)
+ return 0; /* No more breakpoint values */
+ else
+ {
+ b = (*bsp)->breakpoint_at;
+ *bsp = (*bsp)->next;
+ if (b == NULL)
+ return -1; /* breakpoint that's been deleted since */
+ else
+ return b->number; /* We have its number */
+ }
+}
+
+/* Modify BS so that the actions will not be performed. */
+
+void
+bpstat_clear_actions (bs)
+ bpstat bs;
+{
+ for (; bs != NULL; bs = bs->next)
+ {
+ bs->commands = NULL;
+ if (bs->old_val != NULL)
+ {
+ value_free (bs->old_val);
+ bs->old_val = NULL;
+ }
+ }
+}
+
+/* Stub for cleaning up our state if we error-out of a breakpoint command */
+/* ARGSUSED */
static void
-breakpoint_1 (bnum)
- int bnum;
+cleanup_executing_breakpoints (ignore)
+ PTR ignore;
{
- register struct breakpoint *b;
- register struct command_line *l;
- register struct symbol *sym;
- CORE_ADDR last_addr = (CORE_ADDR)-1;
+ executing_breakpoint_commands = 0;
+}
+
+/* Execute all the commands associated with all the breakpoints at this
+ location. Any of these commands could cause the process to proceed
+ beyond this point, etc. We look out for such changes by checking
+ the global "breakpoint_proceeded" after each command. */
+
+void
+bpstat_do_actions (bsp)
+ bpstat *bsp;
+{
+ bpstat bs;
+ struct cleanup *old_chain;
+ struct command_line *cmd;
+
+ /* Avoid endless recursion if a `source' command is contained
+ in bs->commands. */
+ if (executing_breakpoint_commands)
+ return;
+
+ executing_breakpoint_commands = 1;
+ old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
+
+top:
+ /* Note that (as of this writing), our callers all appear to
+ be passing us the address of global stop_bpstat. And, if
+ our calls to execute_control_command cause the inferior to
+ proceed, that global (and hence, *bsp) will change.
+
+ We must be careful to not touch *bsp unless the inferior
+ has not proceeded. */
+
+ /* This pointer will iterate over the list of bpstat's. */
+ bs = *bsp;
+
+ breakpoint_proceeded = 0;
+ for (; bs != NULL; bs = bs->next)
+ {
+ cmd = bs->commands;
+ while (cmd != NULL)
+ {
+ execute_control_command (cmd);
+
+ if (breakpoint_proceeded)
+ break;
+ else
+ cmd = cmd->next;
+ }
+ if (breakpoint_proceeded)
+ /* The inferior is proceeded by the command; bomb out now.
+ The bpstat chain has been blown away by wait_for_inferior.
+ But since execution has stopped again, there is a new bpstat
+ to look at, so start over. */
+ goto top;
+ else
+ bs->commands = NULL;
+ }
+
+ executing_breakpoint_commands = 0;
+ discard_cleanups (old_chain);
+}
+
+/* This is the normal print_it function for a bpstat. In the future,
+ much of this logic could (should?) be moved to bpstat_stop_status,
+ by having it set different print_it functions.
+
+ Current scheme: When we stop, bpstat_print() is called.
+ It loops through the bpstat list of things causing this stop,
+ calling the print_it function for each one. The default
+ print_it function, used for breakpoints, is print_it_normal().
+ (Also see print_it_noop() and print_it_done()).
+
+ Return values from this routine (used by bpstat_print() to
+ decide what to do):
+ 1: Means we printed something, and we do *not* desire that
+ something to be followed by a location.
+ 0: Means we printed something, and we *do* desire that
+ something to be followed by a location.
+ -1: Means we printed nothing. */
+
+static int
+print_it_normal (bs)
+ bpstat bs;
+{
+ /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
+ which has since been deleted. */
+ if (bs->breakpoint_at == NULL
+ || (bs->breakpoint_at->type != bp_breakpoint
+ && bs->breakpoint_at->type != bp_catch_load
+ && bs->breakpoint_at->type != bp_catch_unload
+ && bs->breakpoint_at->type != bp_catch_fork
+ && bs->breakpoint_at->type != bp_catch_vfork
+ && bs->breakpoint_at->type != bp_catch_exec
+ && bs->breakpoint_at->type != bp_catch_catch
+ && bs->breakpoint_at->type != bp_catch_throw
+ && bs->breakpoint_at->type != bp_hardware_breakpoint
+ && bs->breakpoint_at->type != bp_watchpoint
+ && bs->breakpoint_at->type != bp_read_watchpoint
+ && bs->breakpoint_at->type != bp_access_watchpoint
+ && bs->breakpoint_at->type != bp_hardware_watchpoint))
+ return -1;
+
+ if (ep_is_shlib_catchpoint (bs->breakpoint_at))
+ {
+ annotate_catchpoint (bs->breakpoint_at->number);
+ printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
+ if (bs->breakpoint_at->type == bp_catch_load)
+ printf_filtered ("loaded");
+ else if (bs->breakpoint_at->type == bp_catch_unload)
+ printf_filtered ("unloaded");
+ printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
+ return 0;
+ }
+ else if (bs->breakpoint_at->type == bp_catch_fork ||
+ bs->breakpoint_at->type == bp_catch_vfork)
+ {
+ annotate_catchpoint (bs->breakpoint_at->number);
+ printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
+ if (bs->breakpoint_at->type == bp_catch_fork)
+ printf_filtered ("forked");
+ else if (bs->breakpoint_at->type == bp_catch_vfork)
+ printf_filtered ("vforked");
+ printf_filtered (" process %d), ", bs->breakpoint_at->forked_inferior_pid);
+ return 0;
+ }
+ else if (bs->breakpoint_at->type == bp_catch_exec)
+ {
+ annotate_catchpoint (bs->breakpoint_at->number);
+ printf_filtered ("\nCatchpoint %d (exec'd %s), ",
+ bs->breakpoint_at->number,
+ bs->breakpoint_at->exec_pathname);
+ return 0;
+ }
+ else if (bs->breakpoint_at->type == bp_catch_catch)
+ {
+ if (current_exception_event && (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
+ {
+ annotate_catchpoint (bs->breakpoint_at->number);
+ printf_filtered ("\nCatchpoint %d (exception caught), ", bs->breakpoint_at->number);
+ printf_filtered ("throw location ");
+ if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
+ printf_filtered ("%s:%d",
+ CURRENT_EXCEPTION_THROW_FILE,
+ CURRENT_EXCEPTION_THROW_LINE);
+ else
+ printf_filtered ("unknown");
+
+ printf_filtered (", catch location ");
+ if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
+ printf_filtered ("%s:%d",
+ CURRENT_EXCEPTION_CATCH_FILE,
+ CURRENT_EXCEPTION_CATCH_LINE);
+ else
+ printf_filtered ("unknown");
+
+ printf_filtered ("\n");
+ return 1; /* don't bother to print location frame info */
+ }
+ else
+ {
+ return -1; /* really throw, some other bpstat will handle it */
+ }
+ }
+ else if (bs->breakpoint_at->type == bp_catch_throw)
+ {
+ if (current_exception_event && (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
+ {
+ annotate_catchpoint (bs->breakpoint_at->number);
+ printf_filtered ("\nCatchpoint %d (exception thrown), ", bs->breakpoint_at->number);
+ printf_filtered ("throw location ");
+ if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
+ printf_filtered ("%s:%d",
+ CURRENT_EXCEPTION_THROW_FILE,
+ CURRENT_EXCEPTION_THROW_LINE);
+ else
+ printf_filtered ("unknown");
+
+ printf_filtered (", catch location ");
+ if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
+ printf_filtered ("%s:%d",
+ CURRENT_EXCEPTION_CATCH_FILE,
+ CURRENT_EXCEPTION_CATCH_LINE);
+ else
+ printf_filtered ("unknown");
+
+ printf_filtered ("\n");
+ return 1; /* don't bother to print location frame info */
+ }
+ else
+ {
+ return -1; /* really catch, some other bpstat willhandle it */
+ }
+ }
+
+ else if (bs->breakpoint_at->type == bp_breakpoint ||
+ bs->breakpoint_at->type == bp_hardware_breakpoint)
+ {
+ /* I think the user probably only wants to see one breakpoint
+ number, not all of them. */
+ annotate_breakpoint (bs->breakpoint_at->number);
+ printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number);
+ return 0;
+ }
+ else if ((bs->old_val != NULL) &&
+ (bs->breakpoint_at->type == bp_watchpoint ||
+ bs->breakpoint_at->type == bp_access_watchpoint ||
+ bs->breakpoint_at->type == bp_hardware_watchpoint))
+ {
+ annotate_watchpoint (bs->breakpoint_at->number);
+ mention (bs->breakpoint_at);
+ printf_filtered ("\nOld value = ");
+ value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
+ printf_filtered ("\nNew value = ");
+ value_print (bs->breakpoint_at->val, gdb_stdout, 0,
+ Val_pretty_default);
+ printf_filtered ("\n");
+ value_free (bs->old_val);
+ bs->old_val = NULL;
+ /* More than one watchpoint may have been triggered. */
+ return -1;
+ }
+ else if (bs->breakpoint_at->type == bp_access_watchpoint ||
+ bs->breakpoint_at->type == bp_read_watchpoint)
+ {
+ mention (bs->breakpoint_at);
+ printf_filtered ("\nValue = ");
+ value_print (bs->breakpoint_at->val, gdb_stdout, 0,
+ Val_pretty_default);
+ printf_filtered ("\n");
+ return -1;
+ }
+ /* We can't deal with it. Maybe another member of the bpstat chain can. */
+ return -1;
+}
+
+/* Print a message indicating what happened.
+ This is called from normal_stop().
+ The input to this routine is the head of the bpstat list - a list
+ of the eventpoints that caused this stop.
+ This routine calls the "print_it" routine(s) associated
+ with these eventpoints. This will print (for example)
+ the "Breakpoint n," part of the output.
+ The return value of this routine is one of:
+
+ -1: Means we printed nothing
+ 0: Means we printed something, and expect subsequent
+ code to print the location. An example is
+ "Breakpoint 1, " which should be followed by
+ the location.
+ 1 : Means we printed something, but there is no need
+ to also print the location part of the message.
+ An example is the catch/throw messages, which
+ don't require a location appended to the end. */
+
+int
+bpstat_print (bs)
+ bpstat bs;
+{
+ int val;
+
+ if (bs == NULL)
+ return -1;
+
+ val = (*bs->print_it) (bs);
+ if (val >= 0)
+ return val;
+
+ /* Maybe another breakpoint in the chain caused us to stop.
+ (Currently all watchpoints go on the bpstat whether hit or
+ not. That probably could (should) be changed, provided care is taken
+ with respect to bpstat_explains_signal). */
+ if (bs->next)
+ return bpstat_print (bs->next);
+
+ /* We reached the end of the chain without printing anything. */
+ return -1;
+}
+
+/* Evaluate the expression EXP and return 1 if value is zero.
+ This is used inside a catch_errors to evaluate the breakpoint condition.
+ The argument is a "struct expression *" that has been cast to char * to
+ make it pass through catch_errors. */
+
+static int
+breakpoint_cond_eval (exp)
+ PTR exp;
+{
+ value_ptr mark = value_mark ();
+ int i = !value_true (evaluate_expression ((struct expression *)exp));
+ value_free_to_mark (mark);
+ return i;
+}
+
+/* Allocate a new bpstat and chain it to the current one. */
+
+static bpstat
+bpstat_alloc (b, cbs)
+ register struct breakpoint *b;
+ bpstat cbs; /* Current "bs" value */
+{
+ bpstat bs;
+
+ bs = (bpstat) xmalloc (sizeof (*bs));
+ cbs->next = bs;
+ bs->breakpoint_at = b;
+ /* If the condition is false, etc., don't do the commands. */
+ bs->commands = NULL;
+ bs->old_val = NULL;
+ bs->print_it = print_it_normal;
+ return bs;
+}
+\f
+/* Possible return values for watchpoint_check (this can't be an enum
+ because of check_errors). */
+/* The watchpoint has been deleted. */
+#define WP_DELETED 1
+/* The value has changed. */
+#define WP_VALUE_CHANGED 2
+/* The value has not changed. */
+#define WP_VALUE_NOT_CHANGED 3
+
+#define BP_TEMPFLAG 1
+#define BP_HARDWAREFLAG 2
+
+/* Check watchpoint condition. */
+
+static int
+watchpoint_check (p)
+ PTR p;
+{
+ bpstat bs = (bpstat) p;
+ struct breakpoint *b;
+ struct frame_info *fr;
+ int within_current_scope;
+
+ b = bs->breakpoint_at;
+
+ if (b->exp_valid_block == NULL)
+ within_current_scope = 1;
+ else
+ {
+ /* There is no current frame at this moment. If we're going to have
+ any chance of handling watchpoints on local variables, we'll need
+ the frame chain (so we can determine if we're in scope). */
+ reinit_frame_cache();
+ fr = find_frame_addr_in_frame_chain (b->watchpoint_frame);
+ within_current_scope = (fr != NULL);
+ if (within_current_scope)
+ /* If we end up stopping, the current frame will get selected
+ in normal_stop. So this call to select_frame won't affect
+ the user. */
+ select_frame (fr, -1);
+ }
+
+ if (within_current_scope)
+ {
+ /* We use value_{,free_to_}mark because it could be a
+ *long* time before we return to the command level and
+ call free_all_values. We can't call free_all_values because
+ we might be in the middle of evaluating a function call. */
+
+ value_ptr mark = value_mark ();
+ value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp);
+ if (!value_equal (b->val, new_val))
+ {
+ release_value (new_val);
+ value_free_to_mark (mark);
+ bs->old_val = b->val;
+ b->val = new_val;
+ /* We will stop here */
+ return WP_VALUE_CHANGED;
+ }
+ else
+ {
+ /* Nothing changed, don't do anything. */
+ value_free_to_mark (mark);
+ /* We won't stop here */
+ return WP_VALUE_NOT_CHANGED;
+ }
+ }
+ else
+ {
+ /* This seems like the only logical thing to do because
+ if we temporarily ignored the watchpoint, then when
+ we reenter the block in which it is valid it contains
+ garbage (in the case of a function, it may have two
+ garbage values, one before and one after the prologue).
+ So we can't even detect the first assignment to it and
+ watch after that (since the garbage may or may not equal
+ the first value assigned). */
+ printf_filtered ("\
+Watchpoint %d deleted because the program has left the block in\n\
+which its expression is valid.\n", bs->breakpoint_at->number);
+ if (b->related_breakpoint)
+ b->related_breakpoint->disposition = del_at_next_stop;
+ b->disposition = del_at_next_stop;
+
+ return WP_DELETED;
+ }
+}
+
+/* This is used when everything which needs to be printed has
+ already been printed. But we still want to print the frame. */
+
+/* Background: When we stop, bpstat_print() is called.
+ It loops through the bpstat list of things causing this stop,
+ calling the print_it function for each one. The default
+ print_it function, used for breakpoints, is print_it_normal().
+ Also see print_it_noop() and print_it_done() are the other
+ two possibilities. See comments in bpstat_print() and
+ in header of print_it_normal() for more detail. */
+
+static int
+print_it_done (bs)
+ bpstat bs;
+{
+ return 0;
+}
+
+/* This is used when nothing should be printed for this bpstat entry. */
+/* Background: When we stop, bpstat_print() is called.
+ It loops through the bpstat list of things causing this stop,
+ calling the print_it function for each one. The default
+ print_it function, used for breakpoints, is print_it_normal().
+ Also see print_it_noop() and print_it_done() are the other
+ two possibilities. See comments in bpstat_print() and
+ in header of print_it_normal() for more detail. */
+
+static int
+print_it_noop (bs)
+ bpstat bs;
+{
+ return -1;
+}
+
+/* Get a bpstat associated with having just stopped at address *PC
+ and frame address CORE_ADDRESS. Update *PC to point at the
+ breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
+ if this is known to not be a real breakpoint (it could still be a
+ watchpoint, though). */
+
+/* Determine whether we stopped at a breakpoint, etc, or whether we
+ don't understand this stop. Result is a chain of bpstat's such that:
+
+ if we don't understand the stop, the result is a null pointer.
+
+ if we understand why we stopped, the result is not null.
+
+ Each element of the chain refers to a particular breakpoint or
+ watchpoint at which we have stopped. (We may have stopped for
+ several reasons concurrently.)
+
+ Each element of the chain has valid next, breakpoint_at,
+ commands, FIXME??? fields. */
+
+bpstat
+bpstat_stop_status (pc, not_a_breakpoint)
+ CORE_ADDR *pc;
+ int not_a_breakpoint;
+{
+ register struct breakpoint *b, *temp;
+ CORE_ADDR bp_addr;
+ /* True if we've hit a breakpoint (as opposed to a watchpoint). */
+ int real_breakpoint = 0;
+ /* Root of the chain of bpstat's */
+ struct bpstats root_bs[1];
+ /* Pointer to the last thing in the chain currently. */
+ bpstat bs = root_bs;
+ static char message1[] =
+ "Error evaluating expression for watchpoint %d\n";
+ char message[sizeof (message1) + 30 /* slop */];
+
+ /* Get the address where the breakpoint would have been. */
+ bp_addr = *pc - DECR_PC_AFTER_BREAK;
+
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ if (b->enable == disabled
+ || b->enable == shlib_disabled
+ || b->enable == call_disabled)
+ continue;
+
+ if (b->type != bp_watchpoint
+ && b->type != bp_hardware_watchpoint
+ && b->type != bp_read_watchpoint
+ && b->type != bp_access_watchpoint
+ && b->type != bp_hardware_breakpoint
+ && b->type != bp_catch_fork
+ && b->type != bp_catch_vfork
+ && b->type != bp_catch_exec
+ && b->type != bp_catch_catch
+ && b->type != bp_catch_throw) /* a non-watchpoint bp */
+ if (b->address != bp_addr || /* address doesn't match or */
+ (overlay_debugging && /* overlay doesn't match */
+ section_is_overlay (b->section) &&
+ !section_is_mapped (b->section)))
+ continue;
+
+ if (b->type == bp_hardware_breakpoint
+ && b->address != (bp_addr - DECR_PC_AFTER_HW_BREAK))
+ continue;
+
+ if (b->type != bp_watchpoint
+ && b->type != bp_hardware_watchpoint
+ && b->type != bp_read_watchpoint
+ && b->type != bp_access_watchpoint
+ && not_a_breakpoint)
+ continue;
+
+ /* Is this a catchpoint of a load or unload? If so, did we
+ get a load or unload of the specified library? If not,
+ ignore it. */
+ if ((b->type == bp_catch_load)
+#if defined(SOLIB_HAVE_LOAD_EVENT)
+ && (!SOLIB_HAVE_LOAD_EVENT(inferior_pid)
+ || ((b->dll_pathname != NULL)
+ && (strcmp (b->dll_pathname, SOLIB_LOADED_LIBRARY_PATHNAME(inferior_pid)) != 0)))
+#endif
+ )
+ continue;
+
+ if ((b->type == bp_catch_unload)
+#if defined(SOLIB_HAVE_UNLOAD_EVENT)
+ && (!SOLIB_HAVE_UNLOAD_EVENT(inferior_pid)
+ || ((b->dll_pathname != NULL)
+ && (strcmp (b->dll_pathname, SOLIB_UNLOADED_LIBRARY_PATHNAME(inferior_pid)) != 0)))
+#endif
+ )
+ continue;
+
+ if ((b->type == bp_catch_fork)
+ && ! target_has_forked (inferior_pid, &b->forked_inferior_pid))
+ continue;
+
+ if ((b->type == bp_catch_vfork)
+ && ! target_has_vforked (inferior_pid, &b->forked_inferior_pid))
+ continue;
+
+ if ((b->type == bp_catch_exec)
+ && ! target_has_execd (inferior_pid, &b->exec_pathname))
+ continue;
+
+ if (ep_is_exception_catchpoint (b) &&
+ !(current_exception_event = target_get_current_exception_event ()))
+ continue;
+
+ /* Come here if it's a watchpoint, or if the break address matches */
+
+ bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
+
+ /* Watchpoints may change this, if not found to have triggered. */
+ bs->stop = 1;
+ bs->print = 1;
+
+ sprintf (message, message1, b->number);
+ if (b->type == bp_watchpoint || b->type == bp_hardware_watchpoint)
+ {
+ switch (catch_errors (watchpoint_check, bs, message, RETURN_MASK_ALL))
+ {
+ case WP_DELETED:
+ /* We've already printed what needs to be printed. */
+ bs->print_it = print_it_done;
+ /* Stop. */
+ break;
+ case WP_VALUE_CHANGED:
+ /* Stop. */
+ ++(b->hit_count);
+ break;
+ case WP_VALUE_NOT_CHANGED:
+ /* Don't stop. */
+ bs->print_it = print_it_noop;
+ bs->stop = 0;
+ /* Don't consider this a hit. */
+ --(b->hit_count);
+ continue;
+ default:
+ /* Can't happen. */
+ /* FALLTHROUGH */
+ case 0:
+ /* Error from catch_errors. */
+ printf_filtered ("Watchpoint %d deleted.\n", b->number);
+ if (b->related_breakpoint)
+ b->related_breakpoint->disposition = del_at_next_stop;
+ b->disposition = del_at_next_stop;
+ /* We've already printed what needs to be printed. */
+ bs->print_it = print_it_done;
+
+ /* Stop. */
+ break;
+ }
+ }
+ else if (b->type == bp_read_watchpoint || b->type == bp_access_watchpoint)
+ {
+ CORE_ADDR addr;
+ value_ptr v;
+ int found = 0;
+
+ addr = target_stopped_data_address();
+ if (addr == 0) continue;
+ for (v = b->val_chain; v; v = v->next)
+ {
+ if (v->lval == lval_memory)
+ {
+ CORE_ADDR vaddr;
+
+ vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
+ if (addr == vaddr)
+ found = 1;
+ }
+ }
+ if (found)
+ switch (catch_errors (watchpoint_check, bs, message, RETURN_MASK_ALL))
+ {
+ case WP_DELETED:
+ /* We've already printed what needs to be printed. */
+ bs->print_it = print_it_done;
+ /* Stop. */
+ break;
+ case WP_VALUE_CHANGED:
+ case WP_VALUE_NOT_CHANGED:
+ /* Stop. */
+ ++(b->hit_count);
+ break;
+ default:
+ /* Can't happen. */
+ case 0:
+ /* Error from catch_errors. */
+ printf_filtered ("Watchpoint %d deleted.\n", b->number);
+ if (b->related_breakpoint)
+ b->related_breakpoint->disposition = del_at_next_stop;
+ b->disposition = del_at_next_stop;
+ /* We've already printed what needs to be printed. */
+ bs->print_it = print_it_done;
+ break;
+ }
+ }
+ else
+ {
+ /* By definition, an encountered breakpoint is a triggered
+ breakpoint. */
+ ++(b->hit_count);
+
+ if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
+ real_breakpoint = 1;
+ }
+
+ if (b->frame && b->frame != (get_current_frame ())->frame &&
+ (b->type == bp_step_resume &&
+ (INNER_THAN (get_current_frame ()->frame, b->frame))))
+ bs->stop = 0;
+ else
+ {
+ int value_is_zero = 0;
+
+ if (b->cond)
+ {
+ /* Need to select the frame, with all that implies
+ so that the conditions will have the right context. */
+ select_frame (get_current_frame (), 0);
+ value_is_zero
+ = catch_errors (breakpoint_cond_eval, (b->cond),
+ "Error in testing breakpoint condition:\n",
+ RETURN_MASK_ALL);
+ /* FIXME-someday, should give breakpoint # */
+ free_all_values ();
+ }
+ if (b->cond && value_is_zero)
+ {
+ bs->stop = 0;
+ /* Don't consider this a hit. */
+ --(b->hit_count);
+ }
+ else if (b->ignore_count > 0)
+ {
+ b->ignore_count--;
+ bs->stop = 0;
+ }
+ else
+ {
+ /* We will stop here */
+ if (b->disposition == disable)
+ b->enable = disabled;
+ bs->commands = b->commands;
+ if (b->silent)
+ bs->print = 0;
+ if (bs->commands &&
+ (STREQ ("silent", bs->commands->line) ||
+ (xdb_commands && STREQ ("Q", bs->commands->line))))
+ {
+ bs->commands = bs->commands->next;
+ bs->print = 0;
+ }
+ }
+ }
+ /* Print nothing for this entry if we dont stop or if we dont print. */
+ if (bs->stop == 0 || bs->print == 0)
+ bs->print_it = print_it_noop;
+ }
+
+ bs->next = NULL; /* Terminate the chain */
+ bs = root_bs->next; /* Re-grab the head of the chain */
+
+ if ((DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs) && bs)
+ {
+ if (real_breakpoint)
+ {
+ *pc = bp_addr;
+#if defined (SHIFT_INST_REGS)
+ SHIFT_INST_REGS();
+#else /* No SHIFT_INST_REGS. */
+ write_pc (bp_addr);
+#endif /* No SHIFT_INST_REGS. */
+ }
+ }
+
+ /* The value of a hardware watchpoint hasn't changed, but the
+ intermediate memory locations we are watching may have. */
+ if (bs && ! bs->stop &&
+ (bs->breakpoint_at->type == bp_hardware_watchpoint ||
+ bs->breakpoint_at->type == bp_read_watchpoint ||
+ bs->breakpoint_at->type == bp_access_watchpoint))
+ {
+ remove_breakpoints ();
+ insert_breakpoints ();
+ }
+ return bs;
+}
+\f
+/* Tell what to do about this bpstat. */
+struct bpstat_what
+bpstat_what (bs)
+ bpstat bs;
+{
+ /* Classify each bpstat as one of the following. */
+ enum class {
+ /* This bpstat element has no effect on the main_action. */
+ no_effect = 0,
+
+ /* There was a watchpoint, stop but don't print. */
+ wp_silent,
+
+ /* There was a watchpoint, stop and print. */
+ wp_noisy,
+
+ /* There was a breakpoint but we're not stopping. */
+ bp_nostop,
+
+ /* There was a breakpoint, stop but don't print. */
+ bp_silent,
+
+ /* There was a breakpoint, stop and print. */
+ bp_noisy,
+
+ /* We hit the longjmp breakpoint. */
+ long_jump,
+
+ /* We hit the longjmp_resume breakpoint. */
+ long_resume,
+
+ /* We hit the step_resume breakpoint. */
+ step_resume,
+
+ /* We hit the through_sigtramp breakpoint. */
+ through_sig,
+
+ /* We hit the shared library event breakpoint. */
+ shlib_event,
+
+ /* We caught a shared library event. */
+ catch_shlib_event,
+
+ /* This is just used to count how many enums there are. */
+ class_last
+ };
+
+ /* Here is the table which drives this routine. So that we can
+ format it pretty, we define some abbreviations for the
+ enum bpstat_what codes. */
+#define kc BPSTAT_WHAT_KEEP_CHECKING
+#define ss BPSTAT_WHAT_STOP_SILENT
+#define sn BPSTAT_WHAT_STOP_NOISY
+#define sgl BPSTAT_WHAT_SINGLE
+#define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
+#define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
+#define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
+#define sr BPSTAT_WHAT_STEP_RESUME
+#define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
+#define shl BPSTAT_WHAT_CHECK_SHLIBS
+#define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
+
+/* "Can't happen." Might want to print an error message.
+ abort() is not out of the question, but chances are GDB is just
+ a bit confused, not unusable. */
+#define err BPSTAT_WHAT_STOP_NOISY
+
+ /* Given an old action and a class, come up with a new action. */
+ /* One interesting property of this table is that wp_silent is the same
+ as bp_silent and wp_noisy is the same as bp_noisy. That is because
+ after stopping, the check for whether to step over a breakpoint
+ (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
+ reference to how we stopped. We retain separate wp_silent and bp_silent
+ codes in case we want to change that someday. */
+
+ /* step_resume entries: a step resume breakpoint overrides another
+ breakpoint of signal handling (see comment in wait_for_inferior
+ at first IN_SIGTRAMP where we set the step_resume breakpoint). */
+ /* We handle the through_sigtramp_breakpoint the same way; having both
+ one of those and a step_resume_breakpoint is probably very rare (?). */
+
+ static const enum bpstat_what_main_action
+ table[(int)class_last][(int)BPSTAT_WHAT_LAST] =
+ {
+ /* old action */
+ /* kc ss sn sgl slr clr clrs sr ts shl shlr
+ */
+/*no_effect*/ {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
+/*wp_silent*/ {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
+/*wp_noisy*/ {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
+/*bp_nostop*/ {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
+/*bp_silent*/ {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
+/*bp_noisy*/ {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
+/*long_jump*/ {slr, ss, sn, slr, err, err, err, sr, ts, shl, shlr},
+/*long_resume*/ {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
+/*step_resume*/ {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
+/*through_sig*/ {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
+/*shlib*/ {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
+/*catch_shlib*/ {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
+ };
+
+#undef kc
+#undef ss
+#undef sn
+#undef sgl
+#undef slr
+#undef clr
+#undef clrs
+#undef err
+#undef sr
+#undef ts
+#undef shl
+#undef shlr
+ enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
+ struct bpstat_what retval;
+
+ retval.call_dummy = 0;
+ for (; bs != NULL; bs = bs->next)
+ {
+ enum class bs_class = no_effect;
+ if (bs->breakpoint_at == NULL)
+ /* I suspect this can happen if it was a momentary breakpoint
+ which has since been deleted. */
+ continue;
+ switch (bs->breakpoint_at->type)
+ {
+ case bp_none:
+ continue;
+
+ case bp_breakpoint:
+ case bp_hardware_breakpoint:
+ case bp_until:
+ case bp_finish:
+ if (bs->stop)
+ {
+ if (bs->print)
+ bs_class = bp_noisy;
+ else
+ bs_class = bp_silent;
+ }
+ else
+ bs_class = bp_nostop;
+ break;
+ case bp_watchpoint:
+ case bp_hardware_watchpoint:
+ case bp_read_watchpoint:
+ case bp_access_watchpoint:
+ if (bs->stop)
+ {
+ if (bs->print)
+ bs_class = wp_noisy;
+ else
+ bs_class = wp_silent;
+ }
+ else
+ /* There was a watchpoint, but we're not stopping. This requires
+ no further action. */
+ bs_class = no_effect;
+ break;
+ case bp_longjmp:
+ bs_class = long_jump;
+ break;
+ case bp_longjmp_resume:
+ bs_class = long_resume;
+ break;
+ case bp_step_resume:
+ if (bs->stop)
+ {
+ bs_class = step_resume;
+ }
+ else
+ /* It is for the wrong frame. */
+ bs_class = bp_nostop;
+ break;
+ case bp_through_sigtramp:
+ bs_class = through_sig;
+ break;
+ case bp_watchpoint_scope:
+ bs_class = bp_nostop;
+ break;
+ case bp_shlib_event:
+ bs_class = shlib_event;
+ break;
+ case bp_catch_load:
+ case bp_catch_unload:
+ /* Only if this catchpoint triggered should we cause the
+ step-out-of-dld behaviour. Otherwise, we ignore this
+ catchpoint. */
+ if (bs->stop)
+ bs_class = catch_shlib_event;
+ else
+ bs_class = no_effect;
+ break;
+ case bp_catch_fork:
+ case bp_catch_vfork:
+ case bp_catch_exec:
+ if (bs->stop)
+ {
+ if (bs->print)
+ bs_class = bp_noisy;
+ else
+ bs_class = bp_silent;
+ }
+ else
+ /* There was a catchpoint, but we're not stopping. This requires
+ no further action. */
+ bs_class = no_effect;
+ break;
+ case bp_catch_catch:
+ if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
+ bs_class = bp_nostop;
+ else if (bs->stop)
+ bs_class = bs->print ? bp_noisy : bp_silent;
+ break;
+ case bp_catch_throw:
+ if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
+ bs_class = bp_nostop;
+ else if (bs->stop)
+ bs_class = bs->print ? bp_noisy : bp_silent;
+ break;
+ case bp_call_dummy:
+ /* Make sure the action is stop (silent or noisy), so infrun.c
+ pops the dummy frame. */
+ bs_class = bp_silent;
+ retval.call_dummy = 1;
+ break;
+ }
+ current_action = table[(int)bs_class][(int)current_action];
+ }
+ retval.main_action = current_action;
+ return retval;
+}
+
+/* Nonzero if we should step constantly (e.g. watchpoints on machines
+ without hardware support). This isn't related to a specific bpstat,
+ just to things like whether watchpoints are set. */
+
+int
+bpstat_should_step ()
+{
+ struct breakpoint *b;
+ ALL_BREAKPOINTS (b)
+ if (b->enable == enabled && b->type == bp_watchpoint)
+ return 1;
+ return 0;
+}
+
+/* Nonzero if there are enabled hardware watchpoints. */
+int
+bpstat_have_active_hw_watchpoints ()
+{
+ struct breakpoint *b;
+ ALL_BREAKPOINTS (b)
+ if ((b->enable == enabled) &&
+ (b->inserted) &&
+ ((b->type == bp_hardware_watchpoint) ||
+ (b->type == bp_read_watchpoint) ||
+ (b->type == bp_access_watchpoint)))
+ return 1;
+ return 0;
+}
+
+\f
+/* Given a bpstat that records zero or more triggered eventpoints, this
+ function returns another bpstat which contains only the catchpoints
+ on that first list, if any. */
+void
+bpstat_get_triggered_catchpoints (ep_list, cp_list)
+ bpstat ep_list;
+ bpstat * cp_list;
+{
+ struct bpstats root_bs[1];
+ bpstat bs = root_bs;
+ struct breakpoint * ep;
+ char * dll_pathname;
+
+ bpstat_clear (cp_list);
+ root_bs->next = NULL;
+
+ for (; ep_list != NULL; ep_list = ep_list->next )
+ {
+ /* Is this eventpoint a catchpoint? If not, ignore it. */
+ ep = ep_list->breakpoint_at;
+ if (ep == NULL)
+ break;
+ if ((ep->type != bp_catch_load) &&
+ (ep->type != bp_catch_unload) &&
+ (ep->type != bp_catch_catch) &&
+ (ep->type != bp_catch_throw)) /* pai: (temp) ADD fork/vfork here!! */
+ continue;
+
+ /* Yes; add it to the list. */
+ bs = bpstat_alloc (ep, bs);
+ *bs = *ep_list;
+ bs->next = NULL;
+ bs = root_bs->next;
+
+#if defined(SOLIB_ADD)
+ /* Also, for each triggered catchpoint, tag it with the name of
+ the library that caused this trigger. (We copy the name now,
+ because it's only guaranteed to be available NOW, when the
+ catchpoint triggers. Clients who may wish to know the name
+ later must get it from the catchpoint itself.) */
+ if (ep->triggered_dll_pathname != NULL)
+ free (ep->triggered_dll_pathname);
+ if (ep->type == bp_catch_load)
+ dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (inferior_pid);
+ else
+ dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (inferior_pid);
+#else
+ dll_pathname = NULL;
+#endif
+ if (dll_pathname)
+ {
+ ep->triggered_dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
+ strcpy (ep->triggered_dll_pathname, dll_pathname);
+ }
+ else
+ ep->triggered_dll_pathname = NULL;
+ }
+
+ *cp_list = bs;
+}
+
+/* Print information on breakpoint number BNUM, or -1 if all.
+ If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
+ is nonzero, process only watchpoints. */
+
+typedef struct {
+ enum bptype type;
+ char * description;
+} ep_type_description_t;
+
+static void
+breakpoint_1 (bnum, allflag)
+ int bnum;
+ int allflag;
+{
+ register struct breakpoint *b;
+ register struct command_line *l;
+ register struct symbol *sym;
+ CORE_ADDR last_addr = (CORE_ADDR)-1;
+ int found_a_breakpoint = 0;
+ static ep_type_description_t bptypes[] =
+ {
+ {bp_none, "?deleted?"},
+ {bp_breakpoint, "breakpoint"},
+ {bp_hardware_breakpoint, "hw breakpoint"},
+ {bp_until, "until"},
+ {bp_finish, "finish"},
+ {bp_watchpoint, "watchpoint"},
+ {bp_hardware_watchpoint, "hw watchpoint"},
+ {bp_read_watchpoint, "read watchpoint"},
+ {bp_access_watchpoint, "acc watchpoint"},
+ {bp_longjmp, "longjmp"},
+ {bp_longjmp_resume, "longjmp resume"},
+ {bp_step_resume, "step resume"},
+ {bp_through_sigtramp, "sigtramp"},
+ {bp_watchpoint_scope, "watchpoint scope"},
+ {bp_call_dummy, "call dummy"},
+ {bp_shlib_event, "shlib events"},
+ {bp_catch_load, "catch load"},
+ {bp_catch_unload, "catch unload"},
+ {bp_catch_fork, "catch fork"},
+ {bp_catch_vfork, "catch vfork"},
+ {bp_catch_exec, "catch exec"},
+ {bp_catch_catch, "catch catch"},
+ {bp_catch_throw, "catch throw"}
+ };
+
+ static char *bpdisps[] = {"del", "dstp", "dis", "keep"};
+ static char bpenables[] = "nyn";
+ char wrap_indent[80];
+
+ ALL_BREAKPOINTS (b)
+ if (bnum == -1
+ || bnum == b->number)
+ {
+/* We only print out user settable breakpoints unless the allflag is set. */
+ if (!allflag
+ && b->type != bp_breakpoint
+ && b->type != bp_catch_load
+ && b->type != bp_catch_unload
+ && b->type != bp_catch_fork
+ && b->type != bp_catch_vfork
+ && b->type != bp_catch_exec
+ && b->type != bp_catch_catch
+ && b->type != bp_catch_throw
+ && b->type != bp_hardware_breakpoint
+ && b->type != bp_watchpoint
+ && b->type != bp_read_watchpoint
+ && b->type != bp_access_watchpoint
+ && b->type != bp_hardware_watchpoint)
+ continue;
+
+ if (!found_a_breakpoint++)
+ {
+ annotate_breakpoints_headers ();
+
+ annotate_field (0);
+ printf_filtered ("Num ");
+ annotate_field (1);
+ printf_filtered ("Type ");
+ annotate_field (2);
+ printf_filtered ("Disp ");
+ annotate_field (3);
+ printf_filtered ("Enb ");
+ if (addressprint)
+ {
+ annotate_field (4);
+ printf_filtered ("Address ");
+ }
+ annotate_field (5);
+ printf_filtered ("What\n");
+
+ annotate_breakpoints_table ();
+ }
+
+ annotate_record ();
+ annotate_field (0);
+ printf_filtered ("%-3d ", b->number);
+ annotate_field (1);
+ if ((int)b->type > (sizeof(bptypes)/sizeof(bptypes[0])))
+ error ("bptypes table does not describe type #%d.", (int)b->type);
+ if ((int)b->type != bptypes[(int)b->type].type)
+ error ("bptypes table does not describe type #%d?", (int)b->type);
+ printf_filtered ("%-14s ", bptypes[(int)b->type].description);
+ annotate_field (2);
+ printf_filtered ("%-4s ", bpdisps[(int)b->disposition]);
+ annotate_field (3);
+ printf_filtered ("%-3c ", bpenables[(int)b->enable]);
+
+ strcpy (wrap_indent, " ");
+ if (addressprint)
+ strcat (wrap_indent, " ");
+ switch (b->type)
+ {
+ case bp_watchpoint:
+ case bp_hardware_watchpoint:
+ case bp_read_watchpoint:
+ case bp_access_watchpoint:
+ /* Field 4, the address, is omitted (which makes the columns
+ not line up too nicely with the headers, but the effect
+ is relatively readable). */
+ annotate_field (5);
+ print_expression (b->exp, gdb_stdout);
+ break;
+
+ case bp_catch_load:
+ case bp_catch_unload:
+ /* Field 4, the address, is omitted (which makes the columns
+ not line up too nicely with the headers, but the effect
+ is relatively readable). */
+ annotate_field (5);
+ if (b->dll_pathname == NULL)
+ printf_filtered ("<any library> ");
+ else
+ printf_filtered ("library \"%s\" ", b->dll_pathname);
+ break;
+
+ case bp_catch_fork:
+ case bp_catch_vfork:
+ /* Field 4, the address, is omitted (which makes the columns
+ not line up too nicely with the headers, but the effect
+ is relatively readable). */
+ annotate_field (5);
+ if (b->forked_inferior_pid != 0)
+ printf_filtered ("process %d ", b->forked_inferior_pid);
+ break;
+
+ case bp_catch_exec:
+ /* Field 4, the address, is omitted (which makes the columns
+ not line up too nicely with the headers, but the effect
+ is relatively readable). */
+ annotate_field (5);
+ if (b->exec_pathname != NULL)
+ printf_filtered ("program \"%s\" ", b->exec_pathname);
+ break;
+ case bp_catch_catch:
+ /* Field 4, the address, is omitted (which makes the columns
+ not line up too nicely with the headers, but the effect
+ is relatively readable). */
+ annotate_field (5);
+ printf_filtered ("exception catch ");
+ break;
+ case bp_catch_throw:
+ /* Field 4, the address, is omitted (which makes the columns
+ not line up too nicely with the headers, but the effect
+ is relatively readable). */
+ annotate_field (5);
+ printf_filtered ("exception throw ");
+ break;
+
+ case bp_breakpoint:
+ case bp_hardware_breakpoint:
+ case bp_until:
+ case bp_finish:
+ case bp_longjmp:
+ case bp_longjmp_resume:
+ case bp_step_resume:
+ case bp_through_sigtramp:
+ case bp_watchpoint_scope:
+ case bp_call_dummy:
+ case bp_shlib_event:
+ if (addressprint)
+ {
+ annotate_field (4);
+ /* FIXME-32x64: need a print_address_numeric with
+ field width */
+ printf_filtered
+ ("%s ",
+ local_hex_string_custom
+ ((unsigned long) b->address, "08l"));
+ }
+
+ annotate_field (5);
+
+ last_addr = b->address;
+ if (b->source_file)
+ {
+ sym = find_pc_sect_function (b->address, b->section);
+ if (sym)
+ {
+ fputs_filtered ("in ", gdb_stdout);
+ fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
+ wrap_here (wrap_indent);
+ fputs_filtered (" at ", gdb_stdout);
+ }
+ fputs_filtered (b->source_file, gdb_stdout);
+ printf_filtered (":%d", b->line_number);
+ }
+ else
+ print_address_symbolic (b->address, gdb_stdout, demangle, " ");
+ break;
+ }
+
+ if (b->thread != -1)
+ printf_filtered (" thread %d", b->thread );
+
+ printf_filtered ("\n");
+
+ if (b->frame)
+ {
+ annotate_field (6);
+
+ printf_filtered ("\tstop only in stack frame at ");
+ print_address_numeric (b->frame, 1, gdb_stdout);
+ printf_filtered ("\n");
+ }
+
+ if (b->cond)
+ {
+ annotate_field (7);
+
+ printf_filtered ("\tstop only if ");
+ print_expression (b->cond, gdb_stdout);
+ printf_filtered ("\n");
+ }
+
+ if (b->thread != -1)
+ {
+ /* FIXME should make an annotation for this */
+ printf_filtered ("\tstop only in thread %d\n", b->thread);
+ }
+
+ if (show_breakpoint_hit_counts && b->hit_count)
+ {
+ /* FIXME should make an annotation for this */
+ if (ep_is_catchpoint (b))
+ printf_filtered ("\tcatchpoint");
+ else
+ printf_filtered ("\tbreakpoint");
+ printf_filtered (" already hit %d time%s\n",
+ b->hit_count, (b->hit_count == 1 ? "" : "s"));
+ }
+
+ if (b->ignore_count)
+ {
+ annotate_field (8);
+
+ printf_filtered ("\tignore next %d hits\n", b->ignore_count);
+ }
+
+ if ((l = b->commands))
+ {
+ annotate_field (9);
+
+ while (l)
+ {
+ print_command_line (l, 4);
+ l = l->next;
+ }
+ }
+ }
+
+ if (!found_a_breakpoint)
+ {
+ if (bnum == -1)
+ printf_filtered ("No breakpoints or watchpoints.\n");
+ else
+ printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
+ }
+ else
+ /* Compare against (CORE_ADDR)-1 in case some compiler decides
+ that a comparison of an unsigned with -1 is always false. */
+ if (last_addr != (CORE_ADDR)-1)
+ set_next_address (last_addr);
+
+ annotate_breakpoints_table_end ();
+}
+
+/* ARGSUSED */
+static void
+breakpoints_info (bnum_exp, from_tty)
+ char *bnum_exp;
+ int from_tty;
+{
+ int bnum = -1;
+
+ if (bnum_exp)
+ bnum = parse_and_eval_address (bnum_exp);
+
+ breakpoint_1 (bnum, 0);
+}
+
+#if MAINTENANCE_CMDS
+
+/* ARGSUSED */
+void
+maintenance_info_breakpoints (bnum_exp, from_tty)
+ char *bnum_exp;
+ int from_tty;
+{
+ int bnum = -1;
+
+ if (bnum_exp)
+ bnum = parse_and_eval_address (bnum_exp);
+
+ breakpoint_1 (bnum, 1);
+}
+
+#endif
+
+/* Print a message describing any breakpoints set at PC. */
+
+static void
+describe_other_breakpoints (pc, section)
+ CORE_ADDR pc;
+ asection *section;
+{
+ register int others = 0;
+ register struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ if (b->address == pc)
+ if (overlay_debugging == 0 ||
+ b->section == section)
+ others++;
+ if (others > 0)
+ {
+ printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
+ ALL_BREAKPOINTS (b)
+ if (b->address == pc)
+ if (overlay_debugging == 0 ||
+ b->section == section)
+ {
+ others--;
+ printf_filtered
+ ("%d%s%s ",
+ b->number,
+ ((b->enable == disabled || b->enable == shlib_disabled || b->enable == call_disabled)
+ ? " (disabled)" : ""),
+ (others > 1) ? "," : ((others == 1) ? " and" : ""));
+ }
+ printf_filtered ("also set at pc ");
+ print_address_numeric (pc, 1, gdb_stdout);
+ printf_filtered (".\n");
+ }
+}
+\f
+/* Set the default place to put a breakpoint
+ for the `break' command with no arguments. */
+
+void
+set_default_breakpoint (valid, addr, symtab, line)
+ int valid;
+ CORE_ADDR addr;
+ struct symtab *symtab;
+ int line;
+{
+ default_breakpoint_valid = valid;
+ default_breakpoint_address = addr;
+ default_breakpoint_symtab = symtab;
+ default_breakpoint_line = line;
+}
+
+/* Rescan breakpoints at address ADDRESS,
+ marking the first one as "first" and any others as "duplicates".
+ This is so that the bpt instruction is only inserted once. */
+
+static void
+check_duplicates (address, section)
+ CORE_ADDR address;
+ asection *section;
+{
+ register struct breakpoint *b;
+ register int count = 0;
+
+ if (address == 0) /* Watchpoints are uninteresting */
+ return;
+
+ ALL_BREAKPOINTS (b)
+ if (b->enable != disabled
+ && b->enable != shlib_disabled
+ && b->enable != call_disabled
+ && b->address == address
+ && (overlay_debugging == 0 || b->section == section))
+ {
+ count++;
+ b->duplicate = count > 1;
+ }
+}
+
+/* Low level routine to set a breakpoint.
+ Takes as args the three things that every breakpoint must have.
+ Returns the breakpoint object so caller can set other things.
+ Does not set the breakpoint number!
+ Does not print anything.
+
+ ==> This routine should not be called if there is a chance of later
+ error(); otherwise it leaves a bogus breakpoint on the chain. Validate
+ your arguments BEFORE calling this routine! */
+
+struct breakpoint *
+set_raw_breakpoint (sal)
+ struct symtab_and_line sal;
+{
+ register struct breakpoint *b, *b1;
+
+ b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
+ memset (b, 0, sizeof (*b));
+ b->address = sal.pc;
+ if (sal.symtab == NULL)
+ b->source_file = NULL;
+ else
+ b->source_file = savestring (sal.symtab->filename,
+ strlen (sal.symtab->filename));
+ b->section = sal.section;
+ b->language = current_language->la_language;
+ b->input_radix = input_radix;
+ b->thread = -1;
+ b->line_number = sal.line;
+ b->enable = enabled;
+ b->next = 0;
+ b->silent = 0;
+ b->ignore_count = 0;
+ b->commands = NULL;
+ b->frame = 0;
+ b->dll_pathname = NULL;
+ b->triggered_dll_pathname = NULL;
+ b->forked_inferior_pid = 0;
+ b->exec_pathname = NULL;
+
+ /* Add this breakpoint to the end of the chain
+ so that a list of breakpoints will come out in order
+ of increasing numbers. */
+
+ b1 = breakpoint_chain;
+ if (b1 == 0)
+ breakpoint_chain = b;
+ else
+ {
+ while (b1->next)
+ b1 = b1->next;
+ b1->next = b;
+ }
+
+ check_duplicates (sal.pc, sal.section);
+ breakpoints_changed ();
+
+ return b;
+}
+
+#ifdef GET_LONGJMP_TARGET
+
+static void
+create_longjmp_breakpoint (func_name)
+ char *func_name;
+{
+ struct symtab_and_line sal;
+ struct breakpoint *b;
+
+ INIT_SAL (&sal); /* initialize to zeroes */
+ if (func_name != NULL)
+ {
+ struct minimal_symbol *m;
+
+ m = lookup_minimal_symbol_text (func_name, NULL, (struct objfile *)NULL);
+ if (m)
+ sal.pc = SYMBOL_VALUE_ADDRESS (m);
+ else
+ return;
+ }
+ sal.section = find_pc_overlay (sal.pc);
+ b = set_raw_breakpoint (sal);
+ if (!b) return;
+
+ b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume;
+ b->disposition = donttouch;
+ b->enable = disabled;
+ b->silent = 1;
+ if (func_name)
+ b->addr_string = strsave(func_name);
+ b->number = internal_breakpoint_number--;
+}
+
+#endif /* #ifdef GET_LONGJMP_TARGET */
+
+/* Call this routine when stepping and nexting to enable a breakpoint if we do
+ a longjmp(). When we hit that breakpoint, call
+ set_longjmp_resume_breakpoint() to figure out where we are going. */
+
+void
+enable_longjmp_breakpoint()
+{
+ register struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ if (b->type == bp_longjmp)
+ {
+ b->enable = enabled;
+ check_duplicates (b->address, b->section);
+ }
+}
+
+void
+disable_longjmp_breakpoint()
+{
+ register struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ if ( b->type == bp_longjmp
+ || b->type == bp_longjmp_resume)
+ {
+ b->enable = disabled;
+ check_duplicates (b->address, b->section);
+ }
+}
+
+#ifdef SOLIB_ADD
+void
+remove_solib_event_breakpoints ()
+{
+ register struct breakpoint *b, *temp;
+
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ if (b->type == bp_shlib_event)
+ delete_breakpoint (b);
+}
+
+void
+create_solib_event_breakpoint (address)
+ CORE_ADDR address;
+{
+ struct breakpoint *b;
+ struct symtab_and_line sal;
+
+ INIT_SAL (&sal); /* initialize to zeroes */
+ sal.pc = address;
+ sal.section = find_pc_overlay (sal.pc);
+ b = set_raw_breakpoint (sal);
+ b->number = internal_breakpoint_number--;
+ b->disposition = donttouch;
+ b->type = bp_shlib_event;
+}
+
+void
+disable_breakpoints_in_shlibs (silent)
+ int silent;
+{
+ struct breakpoint * b;
+ int disabled_shlib_breaks = 0;
+
+ /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
+ ALL_BREAKPOINTS (b)
+ {
+#if defined (PC_SOLIB)
+ if (((b->type == bp_breakpoint) ||
+ (b->type == bp_hardware_breakpoint)) &&
+ (b->enable != shlib_disabled) &&
+ (b->enable != call_disabled) &&
+ ! b->duplicate &&
+ PC_SOLIB (b->address))
+ {
+ b->enable = shlib_disabled;
+ if (!silent)
+ {
+ if (!disabled_shlib_breaks)
+ {
+ target_terminal_ours_for_output ();
+ printf_filtered ("Temporarily disabling shared library breakpoints:\n");
+ }
+ disabled_shlib_breaks = 1;
+ printf_filtered ("%d ", b->number);
+ }
+ }
+#endif
+ }
+ if (disabled_shlib_breaks && !silent)
+ printf_filtered ("\n");
+}
+
+/* Try to reenable any breakpoints in shared libraries. */
+void
+re_enable_breakpoints_in_shlibs ()
+{
+ struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ if (b->enable == shlib_disabled)
+ {
+ char buf[1];
+
+ /* Do not reenable the breakpoint if the shared library
+ is still not mapped in. */
+ if (target_read_memory (b->address, buf, 1) == 0)
+ b->enable = enabled;
+ }
+}
+
+#endif
+
+static void
+create_solib_load_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string, bp_kind)
+ char * hookname;
+ int tempflag;
+ char * dll_pathname;
+ char * cond_string;
+ enum bptype bp_kind;
+{
+ struct breakpoint * b;
+ struct symtabs_and_lines sals;
+ struct symtab_and_line sal;
+ struct cleanup * old_chain;
+ struct cleanup * canonical_strings_chain = NULL;
+ int i;
+ char * addr_start = hookname;
+ char * addr_end = NULL;
+ char ** canonical = (char **) NULL;
+ int thread = -1; /* All threads. */
+
+ /* Set a breakpoint on the specified hook. */
+ sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
+ addr_end = hookname;
+
+ if (sals.nelts == 0)
+ {
+ warning ("Unable to set a breakpoint on dynamic linker callback.");
+ warning ("Suggest linking with /opt/langtools/lib/end.o.");
+ warning ("GDB will be unable to track shl_load/shl_unload calls");
+ return;
+ }
+ if (sals.nelts != 1)
+ {
+ warning ("Unable to set a unique breakpoint on dynamic linker callback.");
+ warning ("GDB will be unable to track shl_load/shl_unload calls");
+ return;
+ }
+
+ /* Make sure that all storage allocated in decode_line_1 gets freed in case
+ the following errors out. */
+ old_chain = make_cleanup (free, sals.sals);
+ if (canonical != (char **)NULL)
+ {
+ make_cleanup (free, canonical);
+ canonical_strings_chain = make_cleanup (null_cleanup, 0);
+ if (canonical[0] != NULL)
+ make_cleanup (free, canonical[0]);
+ }
+
+ resolve_sal_pc (&sals.sals[0]);
+
+ /* Remove the canonical strings from the cleanup, they are needed below. */
+ if (canonical != (char **)NULL)
+ discard_cleanups (canonical_strings_chain);
+
+ b = set_raw_breakpoint (sals.sals[0]);
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->cond = NULL;
+ b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string));
+ b->thread = thread;
+
+ if (canonical != (char **)NULL && canonical[0] != NULL)
+ b->addr_string = canonical[0];
+ else if (addr_start)
+ b->addr_string = savestring (addr_start, addr_end - addr_start);
+
+ b->enable = enabled;
+ b->disposition = tempflag ? del : donttouch;
+
+ if (dll_pathname == NULL)
+ b->dll_pathname = NULL;
+ else
+ {
+ b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
+ strcpy (b->dll_pathname, dll_pathname);
+ }
+ b->type = bp_kind;
+
+ mention (b);
+ do_cleanups (old_chain);
+}
+
+void
+create_solib_load_event_breakpoint (hookname, tempflag, dll_pathname, cond_string)
+ char * hookname;
+ int tempflag;
+ char * dll_pathname;
+ char * cond_string;
+{
+ create_solib_load_unload_event_breakpoint (hookname,
+ tempflag,
+ dll_pathname,
+ cond_string,
+ bp_catch_load);
+}
+
+void
+create_solib_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string)
+ char * hookname;
+ int tempflag;
+ char * dll_pathname;
+ char * cond_string;
+{
+ create_solib_load_unload_event_breakpoint (hookname,
+ tempflag,
+ dll_pathname,
+ cond_string,
+ bp_catch_unload);
+}
+
+static void
+create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_kind)
+ int tempflag;
+ char * cond_string;
+ enum bptype bp_kind;
+{
+ struct symtab_and_line sal;
+ struct breakpoint * b;
+ int thread = -1; /* All threads. */
+
+ INIT_SAL(&sal);
+ sal.pc = 0;
+ sal.symtab = NULL;
+ sal.line = 0;
+
+ b = set_raw_breakpoint (sal);
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->cond = NULL;
+ b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string));
+ b->thread = thread;
+ b->addr_string = NULL;
+ b->enable = enabled;
+ b->disposition = tempflag ? del : donttouch;
+ b->forked_inferior_pid = 0;
+
+ b->type = bp_kind;
+
+ mention (b);
+}
+
+void
+create_fork_event_catchpoint (tempflag, cond_string)
+ int tempflag;
+ char * cond_string;
+{
+ create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
+}
+
+void
+create_vfork_event_catchpoint (tempflag, cond_string)
+ int tempflag;
+ char * cond_string;
+{
+ create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
+}
+
+void
+create_exec_event_catchpoint (tempflag, cond_string)
+ int tempflag;
+ char * cond_string;
+{
+ struct symtab_and_line sal;
+ struct breakpoint * b;
+ int thread = -1; /* All threads. */
+
+ INIT_SAL(&sal);
+ sal.pc = 0;
+ sal.symtab = NULL;
+ sal.line = 0;
+
+ b = set_raw_breakpoint (sal);
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->cond = NULL;
+ b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string));
+ b->thread = thread;
+ b->addr_string = NULL;
+ b->enable = enabled;
+ b->disposition = tempflag ? del : donttouch;
+
+ b->type = bp_catch_exec;
+
+ mention (b);
+}
+
+static int
+hw_breakpoint_used_count()
+{
+ register struct breakpoint *b;
+ int i = 0;
+
+ ALL_BREAKPOINTS (b)
+ {
+ if (b->type == bp_hardware_breakpoint && b->enable == enabled)
+ i++;
+ }
+
+ return i;
+}
+
+static int
+hw_watchpoint_used_count(type, other_type_used)
+ enum bptype type;
+ int *other_type_used;
+{
+ register struct breakpoint *b;
+ int i = 0;
+
+ *other_type_used = 0;
+ ALL_BREAKPOINTS (b)
+ {
+ if (b->enable == enabled)
+ {
+ if (b->type == type) i++;
+ else if ((b->type == bp_hardware_watchpoint ||
+ b->type == bp_read_watchpoint ||
+ b->type == bp_access_watchpoint)
+ && b->enable == enabled)
+ *other_type_used = 1;
+ }
+ }
+ return i;
+}
+
+/* Call this after hitting the longjmp() breakpoint. Use this to set a new
+ breakpoint at the target of the jmp_buf.
+
+ FIXME - This ought to be done by setting a temporary breakpoint that gets
+ deleted automatically... */
+
+void
+set_longjmp_resume_breakpoint(pc, frame)
+ CORE_ADDR pc;
+ struct frame_info *frame;
+{
+ register struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ if (b->type == bp_longjmp_resume)
+ {
+ b->address = pc;
+ b->enable = enabled;
+ if (frame != NULL)
+ b->frame = frame->frame;
+ else
+ b->frame = 0;
+ check_duplicates (b->address, b->section);
+ return;
+ }
+}
+
+void
+disable_watchpoints_before_interactive_call_start ()
+{
+ struct breakpoint * b;
+
+ ALL_BREAKPOINTS (b)
+ {
+ if (((b->type == bp_watchpoint)
+ || (b->type == bp_hardware_watchpoint)
+ || (b->type == bp_read_watchpoint)
+ || (b->type == bp_access_watchpoint)
+ || ep_is_exception_catchpoint (b))
+ && (b->enable == enabled))
+ {
+ b->enable = call_disabled;
+ check_duplicates (b->address, b->section);
+ }
+ }
+}
+
+void
+enable_watchpoints_after_interactive_call_stop ()
+{
+ struct breakpoint * b;
+
+ ALL_BREAKPOINTS (b)
+ {
+ if (((b->type == bp_watchpoint)
+ || (b->type == bp_hardware_watchpoint)
+ || (b->type == bp_read_watchpoint)
+ || (b->type == bp_access_watchpoint)
+ || ep_is_exception_catchpoint (b))
+ && (b->enable == call_disabled))
+ {
+ b->enable = enabled;
+ check_duplicates (b->address, b->section);
+ }
+ }
+}
+
+
+/* Set a breakpoint that will evaporate an end of command
+ at address specified by SAL.
+ Restrict it to frame FRAME if FRAME is nonzero. */
+
+struct breakpoint *
+set_momentary_breakpoint (sal, frame, type)
+ struct symtab_and_line sal;
+ struct frame_info *frame;
+ enum bptype type;
+{
+ register struct breakpoint *b;
+ b = set_raw_breakpoint (sal);
+ b->type = type;
+ b->enable = enabled;
+ b->disposition = donttouch;
+ b->frame = (frame ? frame->frame : 0);
+
+ /* If we're debugging a multi-threaded program, then we
+ want momentary breakpoints to be active in only a
+ single thread of control. */
+ if (in_thread_list (inferior_pid))
+ b->thread = pid_to_thread_id (inferior_pid);
+
+ return b;
+}
+
+\f
+/* Tell the user we have just set a breakpoint B. */
+
+static void
+mention (b)
+ struct breakpoint *b;
+{
+ int say_where = 0;
+
+ /* FIXME: This is misplaced; mention() is called by things (like hitting a
+ watchpoint) other than breakpoint creation. It should be possible to
+ clean this up and at the same time replace the random calls to
+ breakpoint_changed with this hook, as has already been done for
+ delete_breakpoint_hook and so on. */
+ if (create_breakpoint_hook)
+ create_breakpoint_hook (b);
+
+ switch (b->type)
+ {
+ case bp_none:
+ printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
+ break;
+ case bp_watchpoint:
+ printf_filtered ("Watchpoint %d: ", b->number);
+ print_expression (b->exp, gdb_stdout);
+ break;
+ case bp_hardware_watchpoint:
+ printf_filtered ("Hardware watchpoint %d: ", b->number);
+ print_expression (b->exp, gdb_stdout);
+ break;
+ case bp_read_watchpoint:
+ printf_filtered ("Hardware read watchpoint %d: ", b->number);
+ print_expression (b->exp, gdb_stdout);
+ break;
+ case bp_access_watchpoint:
+ printf_filtered ("Hardware access (read/write) watchpoint %d: ",b->number);
+ print_expression (b->exp, gdb_stdout);
+ break;
+ case bp_breakpoint:
+ printf_filtered ("Breakpoint %d", b->number);
+ say_where = 1;
+ break;
+ case bp_hardware_breakpoint:
+ printf_filtered ("Hardware assisted breakpoint %d", b->number);
+ say_where = 1;
+ break;
+ case bp_catch_load:
+ case bp_catch_unload:
+ printf_filtered ("Catchpoint %d (%s %s)",
+ b->number,
+ (b->type == bp_catch_load) ? "load" : "unload",
+ (b->dll_pathname != NULL) ? b->dll_pathname : "<any library>");
+ break;
+ case bp_catch_fork:
+ case bp_catch_vfork:
+ printf_filtered ("Catchpoint %d (%s)",
+ b->number,
+ (b->type == bp_catch_fork) ? "fork" : "vfork");
+ break;
+ case bp_catch_exec:
+ printf_filtered ("Catchpoint %d (exec)",
+ b->number);
+ break;
+ case bp_catch_catch:
+ case bp_catch_throw:
+ printf_filtered ("Catchpoint %d (%s)",
+ b->number,
+ (b->type == bp_catch_catch) ? "catch" : "throw");
+ break;
+
+ case bp_until:
+ case bp_finish:
+ case bp_longjmp:
+ case bp_longjmp_resume:
+ case bp_step_resume:
+ case bp_through_sigtramp:
+ case bp_call_dummy:
+ case bp_watchpoint_scope:
+ case bp_shlib_event:
+ break;
+ }
+ if (say_where)
+ {
+ if (addressprint || b->source_file == NULL)
+ {
+ printf_filtered (" at ");
+ print_address_numeric (b->address, 1, gdb_stdout);
+ }
+ if (b->source_file)
+ printf_filtered (": file %s, line %d.",
+ b->source_file, b->line_number);
+ TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, b, 1));
+ TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos));
+ }
+ printf_filtered ("\n");
+}
+
+\f
+/* Set a breakpoint according to ARG (function, linenum or *address)
+ flag: first bit : 0 non-temporary, 1 temporary.
+ second bit : 0 normal breakpoint, 1 hardware breakpoint. */
+
+static void
+break_command_1 (arg, flag, from_tty)
+ char *arg;
+ int flag, from_tty;
+{
+ int tempflag, hardwareflag;
+ struct symtabs_and_lines sals;
+ struct symtab_and_line sal;
+ register struct expression *cond = 0;
+ register struct breakpoint *b;
+
+ /* Pointers in arg to the start, and one past the end, of the condition. */
+ char *cond_start = NULL;
+ char *cond_end = NULL;
+ /* Pointers in arg to the start, and one past the end,
+ of the address part. */
+ char *addr_start = NULL;
+ char *addr_end = NULL;
+ struct cleanup *old_chain;
+ struct cleanup *canonical_strings_chain = NULL;
+ char **canonical = (char **)NULL;
+ int i;
+ int thread;
+
+ hardwareflag = flag & BP_HARDWAREFLAG;
+ tempflag = flag & BP_TEMPFLAG;
+
+ sals.sals = NULL;
+ sals.nelts = 0;
+
+ INIT_SAL (&sal); /* initialize to zeroes */
+
+ /* If no arg given, or if first arg is 'if ', use the default breakpoint. */
+
+ if (!arg || (arg[0] == 'i' && arg[1] == 'f'
+ && (arg[2] == ' ' || arg[2] == '\t')))
+ {
+ if (default_breakpoint_valid)
+ {
+ sals.sals = (struct symtab_and_line *)
+ xmalloc (sizeof (struct symtab_and_line));
+ sal.pc = default_breakpoint_address;
+ sal.line = default_breakpoint_line;
+ sal.symtab = default_breakpoint_symtab;
+ sal.section = find_pc_overlay (sal.pc);
+ sals.sals[0] = sal;
+ sals.nelts = 1;
+ }
+ else
+ error ("No default breakpoint address now.");
+ }
+ else
+ {
+ addr_start = arg;
+
+ /* Force almost all breakpoints to be in terms of the
+ current_source_symtab (which is decode_line_1's default). This
+ should produce the results we want almost all of the time while
+ leaving default_breakpoint_* alone. */
+ if (default_breakpoint_valid
+ && (!current_source_symtab
+ || (arg && (*arg == '+' || *arg == '-'))))
+ sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
+ default_breakpoint_line, &canonical);
+ else
+ sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical);
+
+ addr_end = arg;
+ }
+
+ if (! sals.nelts)
+ return;
+
+ /* Make sure that all storage allocated in decode_line_1 gets freed in case
+ the following `for' loop errors out. */
+ old_chain = make_cleanup (free, sals.sals);
+ if (canonical != (char **)NULL)
+ {
+ make_cleanup (free, canonical);
+ canonical_strings_chain = make_cleanup (null_cleanup, 0);
+ for (i = 0; i < sals.nelts; i++)
+ {
+ if (canonical[i] != NULL)
+ make_cleanup (free, canonical[i]);
+ }
+ }
+
+ thread = -1; /* No specific thread yet */
+
+ /* Resolve all line numbers to PC's, and verify that conditions
+ can be parsed, before setting any breakpoints. */
+ for (i = 0; i < sals.nelts; i++)
+ {
+ char *tok, *end_tok;
+ int toklen;
+
+ resolve_sal_pc (&sals.sals[i]);
+
+ /* It's possible for the PC to be nonzero, but still an illegal
+ value on some targets.
+
+ For example, on HP-UX if you start gdb, and before running the
+ inferior you try to set a breakpoint on a shared library function
+ "foo" where the inferior doesn't call "foo" directly but does
+ pass its address to another function call, then we do find a
+ minimal symbol for the "foo", but it's address is invalid.
+ (Appears to be an index into a table that the loader sets up
+ when the inferior is run.)
+
+ Give the target a chance to bless sals.sals[i].pc before we
+ try to make a breakpoint for it. */
+ if (PC_REQUIRES_RUN_BEFORE_USE(sals.sals[i].pc))
+ {
+ error ("Cannot break on %s without a running program.", addr_start);
+ }
+
+ tok = arg;
+
+ while (tok && *tok)
+ {
+ while (*tok == ' ' || *tok == '\t')
+ tok++;
+
+ end_tok = tok;
+
+ while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
+ end_tok++;
+
+ toklen = end_tok - tok;
+
+ if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
+ {
+ tok = cond_start = end_tok + 1;
+ cond = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
+ cond_end = tok;
+ }
+ else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
+ {
+ char *tmptok;
+
+ tok = end_tok + 1;
+ tmptok = tok;
+ thread = strtol (tok, &tok, 0);
+ if (tok == tmptok)
+ error ("Junk after thread keyword.");
+ if (!valid_thread_id (thread))
+ error ("Unknown thread %d\n", thread);
+ }
+ else
+ error ("Junk at end of arguments.");
+ }
+ }
+ if (hardwareflag)
+ {
+ int i, target_resources_ok;
+
+ i = hw_breakpoint_used_count ();
+ target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
+ bp_hardware_breakpoint, i + sals.nelts, 0);
+ if (target_resources_ok == 0)
+ error ("No hardware breakpoint support in the target.");
+ else if (target_resources_ok < 0)
+ error ("Hardware breakpoints used exceeds limit.");
+ }
+
+ /* Remove the canonical strings from the cleanup, they are needed below. */
+ if (canonical != (char **)NULL)
+ discard_cleanups (canonical_strings_chain);
+
+ /* Now set all the breakpoints. */
+ for (i = 0; i < sals.nelts; i++)
+ {
+ sal = sals.sals[i];
+
+ if (from_tty)
+ describe_other_breakpoints (sal.pc, sal.section);
+
+ b = set_raw_breakpoint (sal);
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->type = hardwareflag ? bp_hardware_breakpoint : bp_breakpoint;
+ b->cond = cond;
+ b->thread = thread;
+
+ /* If a canonical line spec is needed use that instead of the
+ command string. */
+ if (canonical != (char **)NULL && canonical[i] != NULL)
+ b->addr_string = canonical[i];
+ else if (addr_start)
+ b->addr_string = savestring (addr_start, addr_end - addr_start);
+ if (cond_start)
+ b->cond_string = savestring (cond_start, cond_end - cond_start);
+
+ b->enable = enabled;
+ b->disposition = tempflag ? del : donttouch;
+ mention (b);
+ }
+
+ if (sals.nelts > 1)
+ {
+ printf_filtered ("Multiple breakpoints were set.\n");
+ printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
+ }
+ do_cleanups (old_chain);
+}
+
+static void
+break_at_finish_at_depth_command_1 (arg, flag, from_tty)
+ char *arg;
+ int flag;
+ int from_tty;
+{
+ struct frame_info *frame;
+ CORE_ADDR low, high, selected_pc = 0;
+ char *extra_args, *level_arg, *addr_string;
+ int extra_args_len = 0, if_arg = 0;
+
+ if (!arg ||
+ (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
+ {
+
+ if (default_breakpoint_valid)
+ {
+ if (selected_frame)
+ {
+ selected_pc = selected_frame->pc;
+ if (arg)
+ if_arg = 1;
+ }
+ else
+ error ("No selected frame.");
+ }
+ else
+ error ("No default breakpoint address now.");
+ }
+ else
+ {
+ extra_args = strchr (arg, ' ');
+ if (extra_args)
+ {
+ extra_args++;
+ extra_args_len = strlen (extra_args);
+ level_arg = (char *) xmalloc (extra_args - arg);
+ strncpy (level_arg, arg, extra_args - arg - 1);
+ level_arg[extra_args - arg - 1] = '\0';
+ }
+ else
+ {
+ level_arg = (char *) xmalloc (strlen (arg) + 1);
+ strcpy (level_arg, arg);
+ }
+
+ frame = parse_frame_specification (level_arg);
+ if (frame)
+ selected_pc = frame->pc;
+ else
+ selected_pc = 0;
+ }
+ if (if_arg)
+ {
+ extra_args = arg;
+ extra_args_len = strlen (arg);
+ }
+
+ if (selected_pc)
+ {
+ if (find_pc_partial_function(selected_pc, (char **)NULL, &low, &high))
+ {
+ addr_string = (char *) xmalloc (26 + extra_args_len);
+ if (extra_args_len)
+ sprintf (addr_string, "*0x%x %s", high, extra_args);
+ else
+ sprintf (addr_string, "*0x%x", high);
+ break_command_1 (addr_string, flag, from_tty);
+ free (addr_string);
+ }
+ else
+ error ("No function contains the specified address");
+ }
+ else
+ error ("Unable to set breakpoint at procedure exit");
+}
+
+
+static void
+break_at_finish_command_1 (arg, flag, from_tty)
+ char *arg;
+ int flag;
+ int from_tty;
+{
+ char *addr_string, *break_string, *beg_addr_string;
+ CORE_ADDR low, high;
+ struct symtabs_and_lines sals;
+ struct symtab_and_line sal;
+ struct cleanup *old_chain;
+ char *extra_args;
+ int extra_args_len = 0;
+ int i, if_arg = 0;
+
+ if (!arg ||
+ (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
+ {
+ if (default_breakpoint_valid)
+ {
+ if (selected_frame)
+ {
+ addr_string = (char *) xmalloc (15);
+ sprintf (addr_string, "*0x%x", selected_frame->pc);
+ if (arg)
+ if_arg = 1;
+ }
+ else
+ error ("No selected frame.");
+ }
+ else
+ error ("No default breakpoint address now.");
+ }
+ else
+ {
+ addr_string = (char *) xmalloc (strlen (arg) + 1);
+ strcpy (addr_string, arg);
+ }
+
+ if (if_arg)
+ {
+ extra_args = arg;
+ extra_args_len = strlen (arg);
+ }
+ else
+ if (arg)
+ {
+ /* get the stuff after the function name or address */
+ extra_args = strchr (arg, ' ');
+ if (extra_args)
+ {
+ extra_args++;
+ extra_args_len = strlen (extra_args);
+ }
+ }
+
+ sals.sals = NULL;
+ sals.nelts = 0;
+
+ beg_addr_string = addr_string;
+ sals = decode_line_1 (&addr_string, 1, (struct symtab *)NULL, 0,
+ (char ***)NULL);
+
+ free (beg_addr_string);
+ old_chain = make_cleanup (free, sals.sals);
+ for (i = 0; (i < sals.nelts); i++)
+ {
+ sal = sals.sals[i];
+ if (find_pc_partial_function (sal.pc, (char **)NULL, &low, &high))
+ {
+ break_string = (char *) xmalloc (extra_args_len + 26);
+ if (extra_args_len)
+ sprintf (break_string, "*0x%x %s", high, extra_args);
+ else
+ sprintf (break_string, "*0x%x", high);
+ break_command_1 (break_string, flag, from_tty);
+ free(break_string);
+ }
+ else
+ error ("No function contains the specified address");
+ }
+ if (sals.nelts > 1)
+ {
+ printf_filtered ("Multiple breakpoints were set.\n");
+ printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
+ }
+ do_cleanups(old_chain);
+}
+
+
+/* Helper function for break_command_1 and disassemble_command. */
+
+void
+resolve_sal_pc (sal)
+ struct symtab_and_line *sal;
+{
+ CORE_ADDR pc;
+
+ if (sal->pc == 0 && sal->symtab != NULL)
+ {
+ if (!find_line_pc (sal->symtab, sal->line, &pc))
+ error ("No line %d in file \"%s\".",
+ sal->line, sal->symtab->filename);
+ sal->pc = pc;
+ }
+
+ if (sal->section == 0 && sal->symtab != NULL)
+ {
+ struct blockvector *bv;
+ struct block *b;
+ struct symbol *sym;
+ int index;
+
+ bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
+ if (bv != NULL)
+ {
+ b = BLOCKVECTOR_BLOCK (bv, index);
+ sym = block_function (b);
+ if (sym != NULL)
+ {
+ fixup_symbol_section (sym, sal->symtab->objfile);
+ sal->section = SYMBOL_BFD_SECTION (sym);
+ }
+ else
+ {
+ /* It really is worthwhile to have the section, so we'll just
+ have to look harder. This case can be executed if we have
+ line numbers but no functions (as can happen in assembly
+ source). */
+
+ struct minimal_symbol *msym;
+
+ msym = lookup_minimal_symbol_by_pc (sal->pc);
+ if (msym)
+ sal->section = SYMBOL_BFD_SECTION (msym);
+ }
+ }
+ }
+}
+
+void
+break_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ break_command_1 (arg, 0, from_tty);
+}
+
+void
+break_at_finish_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ break_at_finish_command_1 (arg, 0, from_tty);
+}
+
+void
+break_at_finish_at_depth_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ break_at_finish_at_depth_command_1 (arg, 0, from_tty);
+}
+
+void
+tbreak_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ break_command_1 (arg, BP_TEMPFLAG, from_tty);
+}
+
+void
+tbreak_at_finish_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
+}
+
+static void
+hbreak_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
+}
+
+static void
+thbreak_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
+}
+
+static void
+stop_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ printf_filtered ("Specify the type of breakpoint to set.\n\
+Usage: stop in <function | address>\n\
+ stop at <line>\n");
+}
+
+static void
+stopin_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ int badInput = 0;
+
+ if (arg == (char *)NULL)
+ badInput = 1;
+ else if (*arg != '*')
+ {
+ char *argptr = arg;
+ int hasColon = 0;
+
+ /* look for a ':'. If this is a line number specification, then say
+ it is bad, otherwise, it should be an address or function/method
+ name */
+ while (*argptr && !hasColon)
+ {
+ hasColon = (*argptr == ':');
+ argptr++;
+ }
+
+ if (hasColon)
+ badInput = (*argptr != ':'); /* Not a class::method */
+ else
+ badInput = isdigit(*arg); /* a simple line number */
+ }
+
+ if (badInput)
+ printf_filtered("Usage: stop in <function | address>\n");
+ else
+ break_command_1 (arg, 0, from_tty);
+}
+
+static void
+stopat_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ int badInput = 0;
+
+ if (arg == (char *)NULL || *arg == '*') /* no line number */
+ badInput = 1;
+ else
+ {
+ char *argptr = arg;
+ int hasColon = 0;
+
+ /* look for a ':'. If there is a '::' then get out, otherwise
+ it is probably a line number. */
+ while (*argptr && !hasColon)
+ {
+ hasColon = (*argptr == ':');
+ argptr++;
+ }
+
+ if (hasColon)
+ badInput = (*argptr == ':'); /* we have class::method */
+ else
+ badInput = !isdigit(*arg); /* not a line number */
+ }
+
+ if (badInput)
+ printf_filtered("Usage: stop at <line>\n");
+ else
+ break_command_1 (arg, 0, from_tty);
+}
+
+/* ARGSUSED */
+/* accessflag: 0: watch write, 1: watch read, 2: watch access(read or write) */
+static void
+watch_command_1 (arg, accessflag, from_tty)
+ char *arg;
+ int accessflag;
+ int from_tty;
+{
+ struct breakpoint *b;
+ struct symtab_and_line sal;
+ struct expression *exp;
+ struct block *exp_valid_block;
+ struct value *val, *mark;
+ struct frame_info *frame;
+ struct frame_info *prev_frame = NULL;
+ char *exp_start = NULL;
+ char *exp_end = NULL;
+ char *tok, *end_tok;
+ int toklen;
+ char *cond_start = NULL;
+ char *cond_end = NULL;
+ struct expression *cond = NULL;
+ int i, other_type_used, target_resources_ok = 0;
+ enum bptype bp_type;
+ int mem_cnt = 0;
+
+ INIT_SAL (&sal); /* initialize to zeroes */
+
+ /* Parse arguments. */
+ innermost_block = NULL;
+ exp_start = arg;
+ exp = parse_exp_1 (&arg, 0, 0);
+ exp_end = arg;
+ exp_valid_block = innermost_block;
+ mark = value_mark ();
+ val = evaluate_expression (exp);
+ release_value (val);
+ if (VALUE_LAZY (val))
+ value_fetch_lazy (val);
+
+ tok = arg;
+ while (*tok == ' ' || *tok == '\t')
+ tok++;
+ end_tok = tok;
+
+ while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
+ end_tok++;
+
+ toklen = end_tok - tok;
+ if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
+ {
+ tok = cond_start = end_tok + 1;
+ cond = parse_exp_1 (&tok, 0, 0);
+ cond_end = tok;
+ }
+ if (*tok)
+ error("Junk at end of command.");
+
+ if (accessflag == 1) bp_type = bp_read_watchpoint;
+ else if (accessflag == 2) bp_type = bp_access_watchpoint;
+ else bp_type = bp_hardware_watchpoint;
+
+ mem_cnt = can_use_hardware_watchpoint (val);
+ if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
+ error ("Expression cannot be implemented with read/access watchpoint.");
+ if (mem_cnt != 0) {
+ i = hw_watchpoint_used_count (bp_type, &other_type_used);
+ target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
+ bp_type, i + mem_cnt, other_type_used);
+ if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
+ error ("Target does not have this type of hardware watchpoint support.");
+ if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
+ error ("Target resources have been allocated for other types of watchpoints.");
+ }
+
+#if defined(HPUXHPPA)
+ /* ??rehrauer: DTS #CHFts23014 notes that on HP-UX if you set a h/w
+ watchpoint before the "run" command, the inferior dies with a e.g.,
+ SIGILL once you start it. I initially believed this was due to a
+ bad interaction between page protection traps and the initial
+ startup sequence by the dynamic linker.
+
+ However, I tried avoiding that by having HP-UX's implementation of
+ TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_pid
+ yet, which forced slow watches before a "run" or "attach", and it
+ still fails somewhere in the startup code.
+
+ Until I figure out what's happening, I'm disallowing watches altogether
+ before the "run" or "attach" command. We'll tell the user they must
+ set watches after getting the program started. */
+ if (! target_has_execution)
+ {
+ warning ("can't do that without a running program; try \"break main\", \"run\" first");
+ return;
+ }
+#endif /* HPUXHPPA */
+
+ /* Now set up the breakpoint. */
+ b = set_raw_breakpoint (sal);
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->disposition = donttouch;
+ b->exp = exp;
+ b->exp_valid_block = exp_valid_block;
+ b->exp_string = savestring (exp_start, exp_end - exp_start);
+ b->val = val;
+ b->cond = cond;
+ if (cond_start)
+ b->cond_string = savestring (cond_start, cond_end - cond_start);
+ else
+ b->cond_string = 0;
+
+ frame = block_innermost_frame (exp_valid_block);
+ if (frame)
+ {
+ prev_frame = get_prev_frame (frame);
+ b->watchpoint_frame = frame->frame;
+ }
+ else
+ b->watchpoint_frame = (CORE_ADDR)0;
+
+ if (mem_cnt && target_resources_ok > 0)
+ b->type = bp_type;
+ else
+ b->type = bp_watchpoint;
+
+ /* If the expression is "local", then set up a "watchpoint scope"
+ breakpoint at the point where we've left the scope of the watchpoint
+ expression. */
+ if (innermost_block)
+ {
+ if (prev_frame)
+ {
+ struct breakpoint *scope_breakpoint;
+ struct symtab_and_line scope_sal;
+
+ INIT_SAL (&scope_sal); /* initialize to zeroes */
+ scope_sal.pc = get_frame_pc (prev_frame);
+ scope_sal.section = find_pc_overlay (scope_sal.pc);
+
+ scope_breakpoint = set_raw_breakpoint (scope_sal);
+ set_breakpoint_count (breakpoint_count + 1);
+ scope_breakpoint->number = breakpoint_count;
+
+ scope_breakpoint->type = bp_watchpoint_scope;
+ scope_breakpoint->enable = enabled;
+
+ /* Automatically delete the breakpoint when it hits. */
+ scope_breakpoint->disposition = del;
+
+ /* Only break in the proper frame (help with recursion). */
+ scope_breakpoint->frame = prev_frame->frame;
+
+ /* Set the address at which we will stop. */
+ scope_breakpoint->address = get_frame_pc (prev_frame);
+
+ /* The scope breakpoint is related to the watchpoint. We
+ will need to act on them together. */
+ b->related_breakpoint = scope_breakpoint;
+ }
+ }
+ value_free_to_mark (mark);
+ mention (b);
+}
+
+/* Return count of locations need to be watched and can be handled
+ in hardware. If the watchpoint can not be handled
+ in hardware return zero. */
+
+#if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
+#define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_size) \
+ ((byte_size) <= (REGISTER_SIZE))
+#endif
+
+static int
+can_use_hardware_watchpoint (v)
+ struct value *v;
+{
+ int found_memory_cnt = 0;
+
+ /* Did the user specifically forbid us to use hardware watchpoints? */
+ if (! can_use_hw_watchpoints)
+ return 0;
+
+ /* Make sure all the intermediate values are in memory. Also make sure
+ we found at least one memory expression. Guards against watch 0x12345,
+ which is meaningless, but could cause errors if one tries to insert a
+ hardware watchpoint for the constant expression. */
+ for ( ; v; v = v->next)
+ {
+ if (v->lval == lval_memory)
+ {
+ if (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT (TYPE_LENGTH (VALUE_TYPE (v))))
+ found_memory_cnt++;
+ }
+ else if (v->lval != not_lval && v->modifiable == 0)
+ return 0;
+ }
+
+ /* The expression itself looks suitable for using a hardware
+ watchpoint, but give the target machine a chance to reject it. */
+ return found_memory_cnt;
+}
+
+static void watch_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ watch_command_1 (arg, 0, from_tty);
+}
+
+static void rwatch_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ watch_command_1 (arg, 1, from_tty);
+}
+
+static void awatch_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ watch_command_1 (arg, 2, from_tty);
+}
+
+\f
+/* Helper routine for the until_command routine in infcmd.c. Here
+ because it uses the mechanisms of breakpoints. */
+
+/* ARGSUSED */
+void
+until_break_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ struct symtabs_and_lines sals;
+ struct symtab_and_line sal;
+ struct frame_info *prev_frame = get_prev_frame (selected_frame);
+ struct breakpoint *breakpoint;
+ struct cleanup *old_chain;
+
+ clear_proceed_status ();
+
+ /* Set a breakpoint where the user wants it and at return from
+ this function */
+
+ if (default_breakpoint_valid)
+ sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
+ default_breakpoint_line, (char ***)NULL);
+ else
+ sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL);
+
+ if (sals.nelts != 1)
+ error ("Couldn't get information on specified line.");
+
+ sal = sals.sals[0];
+ free ((PTR)sals.sals); /* malloc'd, so freed */
+
+ if (*arg)
+ error ("Junk at end of arguments.");
+
+ resolve_sal_pc (&sal);
+
+ breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
+
+ old_chain = make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint);
+
+ /* Keep within the current frame */
+
+ if (prev_frame)
+ {
+ sal = find_pc_line (prev_frame->pc, 0);
+ sal.pc = prev_frame->pc;
+ breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
+ make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint);
+ }
+
+ proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
+ do_cleanups(old_chain);
+}
+\f
+#if 0
+/* These aren't used; I don't konw what they were for. */
+/* Set a breakpoint at the catch clause for NAME. */
+static int
+catch_breakpoint (name)
+ char *name;
+{
+}
+
+static int
+disable_catch_breakpoint ()
+{
+}
+
+static int
+delete_catch_breakpoint ()
+{
+}
+
+static int
+enable_catch_breakpoint ()
+{
+}
+#endif /* 0 */
+
+struct sal_chain
+{
+ struct sal_chain *next;
+ struct symtab_and_line sal;
+};
+
+/* Not really used -- invocation in handle_gnu_4_16_catch_command
+ had been commented out in the v.4.16 sources, and stays
+ disabled there now because "catch NAME" syntax isn't allowed.
+ pai/1997-07-11 */
+/* This isn't used; I don't know what it was for. */
+/* For each catch clause identified in ARGS, run FUNCTION
+ with that clause as an argument. */
+static struct symtabs_and_lines
+map_catch_names (args, function)
+ char *args;
+ int (*function)();
+{
+ register char *p = args;
+ register char *p1;
+ struct symtabs_and_lines sals;
+#if 0
+ struct sal_chain *sal_chain = 0;
+#endif
+
+ if (p == 0)
+ error_no_arg ("one or more catch names");
+
+ sals.nelts = 0;
+ sals.sals = NULL;
+
+ while (*p)
+ {
+ p1 = p;
+ /* Don't swallow conditional part. */
+ if (p1[0] == 'i' && p1[1] == 'f'
+ && (p1[2] == ' ' || p1[2] == '\t'))
+ break;
+
+ if (isalpha (*p1))
+ {
+ p1++;
+ while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
+ p1++;
+ }
+
+ if (*p1 && *p1 != ' ' && *p1 != '\t')
+ error ("Arguments must be catch names.");
+
+ *p1 = 0;
+#if 0
+ if (function (p))
+ {
+ struct sal_chain *next = (struct sal_chain *)
+ alloca (sizeof (struct sal_chain));
+ next->next = sal_chain;
+ next->sal = get_catch_sal (p);
+ sal_chain = next;
+ goto win;
+ }
+#endif
+ printf_unfiltered ("No catch clause for exception %s.\n", p);
+#if 0
+ win:
+#endif
+ p = p1;
+ while (*p == ' ' || *p == '\t') p++;
+ }
+}
+
+/* This shares a lot of code with `print_frame_label_vars' from stack.c. */
+
+static struct symtabs_and_lines
+get_catch_sals (this_level_only)
+ int this_level_only;
+{
+ register struct blockvector *bl;
+ register struct block *block;
+ int index, have_default = 0;
+ CORE_ADDR pc;
+ struct symtabs_and_lines sals;
+ struct sal_chain *sal_chain = 0;
+ char *blocks_searched;
- ALL_BREAKPOINTS (b)
- if (bnum == -1 || bnum == b->number)
- {
- printf_filtered ("#%-3d %c 0x%08x ", b->number,
- "nyod"[(int) b->enable],
- b->address);
- last_addr = b->address;
- if (b->symtab)
- {
- sym = find_pc_function (b->address);
- if (sym)
- printf_filtered (" in %s (%s line %d)", SYMBOL_NAME (sym),
- b->symtab->filename, b->line_number);
- else
- printf_filtered ("%s line %d", b->symtab->filename, b->line_number);
- }
- else
- {
- char *name;
- int addr;
+ /* Not sure whether an error message is always the correct response,
+ but it's better than a core dump. */
+ if (selected_frame == NULL)
+ error ("No selected frame.");
+ block = get_frame_block (selected_frame);
+ pc = selected_frame->pc;
- if (find_pc_partial_function (b->address, &name, &addr))
- {
- if (b->address - addr)
- printf_filtered ("<%s+%d>", name, b->address - addr);
- else
- printf_filtered ("<%s>", name);
- }
- }
-
- printf_filtered ("\n");
+ sals.nelts = 0;
+ sals.sals = NULL;
- if (b->ignore_count)
- printf_filtered ("\tignore next %d hits\n", b->ignore_count);
- if (b->frame)
- printf_filtered ("\tstop only in stack frame at 0x%x\n", b->frame);
- if (b->cond)
- {
- printf_filtered ("\tbreak only if ");
- print_expression (b->cond, stdout);
- printf_filtered ("\n");
- }
- if (l = b->commands)
- while (l)
+ if (block == 0)
+ error ("No symbol table info available.\n");
+
+ bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
+ blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
+ memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
+
+ while (block != 0)
+ {
+ CORE_ADDR end = BLOCK_END (block) - 4;
+ int last_index;
+
+ if (bl != blockvector_for_pc (end, &index))
+ error ("blockvector blotch");
+ if (BLOCKVECTOR_BLOCK (bl, index) != block)
+ error ("blockvector botch");
+ last_index = BLOCKVECTOR_NBLOCKS (bl);
+ index += 1;
+
+ /* Don't print out blocks that have gone by. */
+ while (index < last_index
+ && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
+ index++;
+
+ while (index < last_index
+ && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
+ {
+ if (blocks_searched[index] == 0)
{
- printf_filtered ("\t%s\n", l->line);
- l = l->next;
+ struct block *b = BLOCKVECTOR_BLOCK (bl, index);
+ int nsyms;
+ register int i;
+ register struct symbol *sym;
+
+ nsyms = BLOCK_NSYMS (b);
+
+ for (i = 0; i < nsyms; i++)
+ {
+ sym = BLOCK_SYM (b, i);
+ if (STREQ (SYMBOL_NAME (sym), "default"))
+ {
+ if (have_default)
+ continue;
+ have_default = 1;
+ }
+ if (SYMBOL_CLASS (sym) == LOC_LABEL)
+ {
+ struct sal_chain *next = (struct sal_chain *)
+ alloca (sizeof (struct sal_chain));
+ next->next = sal_chain;
+ next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
+ sal_chain = next;
+ }
+ }
+ blocks_searched[index] = 1;
}
- }
+ index++;
+ }
+ if (have_default)
+ break;
+ if (sal_chain && this_level_only)
+ break;
+
+ /* After handling the function's top-level block, stop.
+ Don't continue to its superblock, the block of
+ per-file symbols. */
+ if (BLOCK_FUNCTION (block))
+ break;
+ block = BLOCK_SUPERBLOCK (block);
+ }
+
+ if (sal_chain)
+ {
+ struct sal_chain *tmp_chain;
+
+ /* Count the number of entries. */
+ for (index = 0, tmp_chain = sal_chain; tmp_chain;
+ tmp_chain = tmp_chain->next)
+ index++;
+
+ sals.nelts = index;
+ sals.sals = (struct symtab_and_line *)
+ xmalloc (index * sizeof (struct symtab_and_line));
+ for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
+ sals.sals[index] = sal_chain->sal;
+ }
- /* Compare against (CORE_ADDR)-1 in case some compiler decides
- that a comparison of an unsigned with -1 is always false. */
- if (last_addr != (CORE_ADDR)-1)
- set_next_address (last_addr);
+ return sals;
}
static void
-breakpoints_info (bnum_exp)
- char *bnum_exp;
+ep_skip_leading_whitespace (s)
+ char ** s;
{
- int bnum = -1;
-
- if (bnum_exp)
- bnum = parse_and_eval_address (bnum_exp);
- else if (breakpoint_chain == 0)
- printf_filtered ("No breakpoints.\n");
- else
- printf_filtered ("Breakpoints:\n\
-Num Enb Address Where\n");
-
- breakpoint_1 (bnum);
+ if ((s == NULL) || (*s == NULL))
+ return;
+ while (isspace(**s))
+ *s += 1;
+}
+
+/* This function examines a string, and attempts to find a token
+ that might be an event name in the leading characters. If a
+ possible match is found, a pointer to the last character of
+ the token is returned. Else, NULL is returned. */
+static char *
+ep_find_event_name_end (arg)
+ char * arg;
+{
+ char * s = arg;
+ char * event_name_end = NULL;
+
+ /* If we could depend upon the presense of strrpbrk, we'd use that... */
+ if (arg == NULL)
+ return NULL;
+
+ /* We break out of the loop when we find a token delimiter.
+ Basically, we're looking for alphanumerics and underscores;
+ anything else delimites the token. */
+ while (*s != '\0')
+ {
+ if (! isalnum(*s) && (*s != '_'))
+ break;
+ event_name_end = s;
+ s++;
+ }
+
+ return event_name_end;
}
-/* Print a message describing any breakpoints set at PC. */
+
+/* This function attempts to parse an optional "if <cond>" clause
+ from the arg string. If one is not found, it returns NULL.
+
+ Else, it returns a pointer to the condition string. (It does not
+ attempt to evaluate the string against a particular block.) And,
+ it updates arg to point to the first character following the parsed
+ if clause in the arg string. */
+static char *
+ep_parse_optional_if_clause (arg)
+ char ** arg;
+{
+ char * cond_string;
+
+ if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace((*arg)[2]))
+ return NULL;
+
+ /* Skip the "if" keyword. */
+ (*arg) += 2;
+
+ /* Skip any extra leading whitespace, and record the start of the
+ condition string. */
+ ep_skip_leading_whitespace (arg);
+ cond_string = *arg;
+
+ /* Assume that the condition occupies the remainder of the arg string. */
+ (*arg) += strlen (cond_string);
+
+ return cond_string;
+}
+
+/* This function attempts to parse an optional filename from the arg
+ string. If one is not found, it returns NULL.
+
+ Else, it returns a pointer to the parsed filename. (This function
+ makes no attempt to verify that a file of that name exists, or is
+ accessible.) And, it updates arg to point to the first character
+ following the parsed filename in the arg string.
+
+ Note that clients needing to preserve the returned filename for
+ future access should copy it to their own buffers. */
+static char *
+ep_parse_optional_filename (arg)
+ char ** arg;
+{
+ static char filename [1024];
+ char * arg_p = *arg;
+ int i;
+ char c;
+
+ if ((*arg_p == '\0') || isspace (*arg_p))
+ return NULL;
+
+ for (i=0; ; i++)
+ {
+ c = *arg_p;
+ if (isspace (c))
+ c = '\0';
+ filename[i] = c;
+ if (c == '\0')
+ break;
+ arg_p++;
+ }
+ *arg = arg_p;
+
+ return filename;
+}
+
+/* Commands to deal with catching events, such as signals, exceptions,
+ process start/exit, etc. */
+
+typedef enum {catch_fork, catch_vfork} catch_fork_kind;
+
+static void
+catch_fork_command_1 (fork_kind, arg, tempflag, from_tty)
+ catch_fork_kind fork_kind;
+ char * arg;
+ int tempflag;
+ int from_tty;
+{
+ char * cond_string = NULL;
+
+ ep_skip_leading_whitespace (&arg);
+
+ /* The allowed syntax is:
+ catch [v]fork
+ catch [v]fork if <cond>
+
+ First, check if there's an if clause. */
+ cond_string = ep_parse_optional_if_clause (&arg);
+
+ if ((*arg != '\0') && !isspace (*arg))
+ error ("Junk at end of arguments.");
+
+ /* If this target supports it, create a fork or vfork catchpoint
+ and enable reporting of such events. */
+ switch (fork_kind) {
+ case catch_fork :
+ create_fork_event_catchpoint (tempflag, cond_string);
+ break;
+ case catch_vfork :
+ create_vfork_event_catchpoint (tempflag, cond_string);
+ break;
+ default :
+ error ("unsupported or unknown fork kind; cannot catch it");
+ break;
+ }
+}
static void
-describe_other_breakpoints (pc)
- register CORE_ADDR pc;
+catch_exec_command_1 (arg, tempflag, from_tty)
+ char * arg;
+ int tempflag;
+ int from_tty;
{
- register int others = 0;
- register struct breakpoint *b;
+ char * cond_string = NULL;
- ALL_BREAKPOINTS (b)
- if (b->address == pc)
- others++;
- if (others > 0)
+ ep_skip_leading_whitespace (&arg);
+
+ /* The allowed syntax is:
+ catch exec
+ catch exec if <cond>
+
+ First, check if there's an if clause. */
+ cond_string = ep_parse_optional_if_clause (&arg);
+
+ if ((*arg != '\0') && !isspace (*arg))
+ error ("Junk at end of arguments.");
+
+ /* If this target supports it, create an exec catchpoint
+ and enable reporting of such events. */
+ create_exec_event_catchpoint (tempflag, cond_string);
+}
+
+#if defined(SOLIB_ADD)
+static void
+catch_load_command_1 (arg, tempflag, from_tty)
+ char * arg;
+ int tempflag;
+ int from_tty;
+{
+ char * dll_pathname = NULL;
+ char * cond_string = NULL;
+
+ ep_skip_leading_whitespace (&arg);
+
+ /* The allowed syntax is:
+ catch load
+ catch load if <cond>
+ catch load <filename>
+ catch load <filename> if <cond>
+
+ The user is not allowed to specify the <filename> after an
+ if clause.
+
+ We'll ignore the pathological case of a file named "if".
+
+ First, check if there's an if clause. If so, then there
+ cannot be a filename. */
+ cond_string = ep_parse_optional_if_clause (&arg);
+
+ /* If there was an if clause, then there cannot be a filename.
+ Else, there might be a filename and an if clause. */
+ if (cond_string == NULL)
{
- printf ("Note: breakpoint%s ", (others > 1) ? "s" : "");
- ALL_BREAKPOINTS (b)
- if (b->address == pc)
- {
- others--;
- printf ("%d%s%s ",
- b->number,
- (b->enable == disabled) ? " (disabled)" : "",
- (others > 1) ? "," : ((others == 1) ? " and" : ""));
- }
- printf ("also set at pc 0x%x.\n", pc);
+ dll_pathname = ep_parse_optional_filename (&arg);
+ ep_skip_leading_whitespace (&arg);
+ cond_string = ep_parse_optional_if_clause (&arg);
}
+
+ if ((*arg != '\0') && !isspace (*arg))
+ error ("Junk at end of arguments.");
+
+ /* Create a load breakpoint that only triggers when a load of
+ the specified dll (or any dll, if no pathname was specified)
+ occurs. */
+ SOLIB_CREATE_CATCH_LOAD_HOOK (inferior_pid, tempflag, dll_pathname, cond_string);
}
-\f
-/* Set the default place to put a breakpoint
- for the `break' command with no arguments. */
-
-void
-set_default_breakpoint (valid, addr, symtab, line)
- int valid;
- CORE_ADDR addr;
- struct symtab *symtab;
- int line;
+
+static void
+catch_unload_command_1 (arg, tempflag, from_tty)
+ char * arg;
+ int tempflag;
+ int from_tty;
{
- default_breakpoint_valid = valid;
- default_breakpoint_address = addr;
- default_breakpoint_symtab = symtab;
- default_breakpoint_line = line;
+ char * dll_pathname = NULL;
+ char * cond_string = NULL;
+
+ ep_skip_leading_whitespace (&arg);
+
+ /* The allowed syntax is:
+ catch unload
+ catch unload if <cond>
+ catch unload <filename>
+ catch unload <filename> if <cond>
+
+ The user is not allowed to specify the <filename> after an
+ if clause.
+
+ We'll ignore the pathological case of a file named "if".
+
+ First, check if there's an if clause. If so, then there
+ cannot be a filename. */
+ cond_string = ep_parse_optional_if_clause (&arg);
+
+ /* If there was an if clause, then there cannot be a filename.
+ Else, there might be a filename and an if clause. */
+ if (cond_string == NULL)
+ {
+ dll_pathname = ep_parse_optional_filename (&arg);
+ ep_skip_leading_whitespace (&arg);
+ cond_string = ep_parse_optional_if_clause (&arg);
+ }
+
+ if ((*arg != '\0') && !isspace (*arg))
+ error ("Junk at end of arguments.");
+
+ /* Create an unload breakpoint that only triggers when an unload of
+ the specified dll (or any dll, if no pathname was specified)
+ occurs. */
+ SOLIB_CREATE_CATCH_UNLOAD_HOOK (inferior_pid, tempflag, dll_pathname, cond_string);
}
+#endif /* SOLIB_ADD */
-/* Rescan breakpoints at address ADDRESS,
- marking the first one as "first" and any others as "duplicates".
- This is so that the bpt instruction is only inserted once. */
+/* Commands to deal with catching exceptions. */
+
+/* Set a breakpoint at the specified callback routine for an
+ exception event callback */
static void
-check_duplicates (address)
- CORE_ADDR address;
+create_exception_catchpoint (tempflag, cond_string, ex_event, sal)
+ int tempflag;
+ char * cond_string;
+ enum exception_event_kind ex_event;
+ struct symtab_and_line * sal;
{
- register struct breakpoint *b;
- register int count = 0;
+ struct breakpoint * b;
+ int i;
+ int thread = -1; /* All threads. */
- ALL_BREAKPOINTS (b)
- if (b->enable != disabled && b->address == address)
- {
- count++;
- b->duplicate = count > 1;
- }
+ if (!sal) /* no exception support? */
+ return;
+
+ b = set_raw_breakpoint (*sal);
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->cond = NULL;
+ b->cond_string = (cond_string == NULL) ? NULL : savestring (cond_string, strlen (cond_string));
+ b->thread = thread;
+ b->addr_string = NULL;
+ b->enable = enabled;
+ b->disposition = tempflag ? del : donttouch;
+ switch (ex_event)
+ {
+ case EX_EVENT_THROW:
+ b->type = bp_catch_throw;
+ break;
+ case EX_EVENT_CATCH:
+ b->type = bp_catch_catch;
+ break;
+ default: /* error condition */
+ b->type = bp_none;
+ b->enable = disabled;
+ error ("Internal error -- invalid catchpoint kind");
+ }
+ mention (b);
}
-/* Low level routine to set a breakpoint.
- Takes as args the three things that every breakpoint must have.
- Returns the breakpoint object so caller can set other things.
- Does not set the breakpoint number!
- Does not print anything. */
+/* Deal with "catch catch" and "catch throw" commands */
-static struct breakpoint *
-set_raw_breakpoint (sal)
- struct symtab_and_line sal;
+static void
+catch_exception_command_1 (ex_event, arg, tempflag, from_tty)
+ enum exception_event_kind ex_event;
+ char * arg;
+ int tempflag;
+ int from_tty;
{
- register struct breakpoint *b, *b1;
+ char * cond_string = NULL;
+ struct symtab_and_line * sal = NULL;
+
+ ep_skip_leading_whitespace (&arg);
+
+ cond_string = ep_parse_optional_if_clause (&arg);
- b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
- bzero (b, sizeof *b);
- b->address = sal.pc;
- b->symtab = sal.symtab;
- b->line_number = sal.line;
- b->enable = enabled;
- b->next = 0;
- b->silent = 0;
+ if ((*arg != '\0') && !isspace (*arg))
+ error ("Junk at end of arguments.");
- /* Add this breakpoint to the end of the chain
- so that a list of breakpoints will come out in order
- of increasing numbers. */
+ if ((ex_event != EX_EVENT_THROW) &&
+ (ex_event != EX_EVENT_CATCH))
+ error ("Unsupported or unknown exception event; cannot catch it");
- b1 = breakpoint_chain;
- if (b1 == 0)
- breakpoint_chain = b;
- else
+ /* See if we can find a callback routine */
+ sal = target_enable_exception_callback (ex_event, 1);
+
+ if (sal)
{
- while (b1->next)
- b1 = b1->next;
- b1->next = b;
+ /* We have callbacks from the runtime system for exceptions.
+ Set a breakpoint on the sal found, if no errors */
+ if (sal != (struct symtab_and_line *) -1)
+ create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
+ else
+ return; /* something went wrong with setting up callbacks */
+ }
+ else
+ {
+ /* No callbacks from runtime system for exceptions.
+ Try GNU C++ exception breakpoints using labels in debug info. */
+ if (ex_event == EX_EVENT_CATCH)
+ {
+ handle_gnu_4_16_catch_command (arg, tempflag, from_tty);
+ }
+ else if (ex_event == EX_EVENT_THROW)
+ {
+ /* Set a breakpoint on __raise_exception () */
+
+ fprintf_filtered (gdb_stderr, "Unsupported with this platform/compiler combination.\n");
+ fprintf_filtered (gdb_stderr, "Perhaps you can achieve the effect you want by setting\n");
+ fprintf_filtered (gdb_stderr, "a breakpoint on __raise_exception().\n");
+ }
}
-
- check_duplicates (sal.pc);
-
- return b;
}
-/* Set a breakpoint that will evaporate an end of command
- at address specified by SAL.
- Restrict it to frame FRAME if FRAME is nonzero. */
+/* Cover routine to allow wrapping target_enable_exception_catchpoints
+ inside a catch_errors */
-void
-set_momentary_breakpoint (sal, frame)
- struct symtab_and_line sal;
- FRAME frame;
+static int
+cover_target_enable_exception_callback (arg)
+ PTR arg;
{
- register struct breakpoint *b;
- b = set_raw_breakpoint (sal);
- b->number = -3;
- b->enable = delete;
- b->frame = (frame ? FRAME_FP (frame) : 0);
+ args_for_catchpoint_enable *args = arg;
+ struct symtab_and_line *sal;
+ sal = target_enable_exception_callback (args->kind, args->enable);
+ if (sal == NULL)
+ return 0;
+ else if (sal == (struct symtab_and_line *) -1)
+ return -1;
+ else
+ return 1; /*is valid*/
}
-void
-clear_momentary_breakpoints ()
-{
- register struct breakpoint *b;
- ALL_BREAKPOINTS (b)
- if (b->number == -3)
- {
- delete_breakpoint (b);
- break;
- }
-}
-\f
-/* Set a breakpoint from a symtab and line.
- If TEMPFLAG is nonzero, it is a temporary breakpoint.
- Print the same confirmation messages that the breakpoint command prints. */
-void
-set_breakpoint (s, line, tempflag)
- struct symtab *s;
- int line;
- int tempflag;
-{
- register struct breakpoint *b;
- struct symtab_and_line sal;
-
- sal.symtab = s;
- sal.line = line;
- sal.pc = find_line_pc (sal.symtab, sal.line);
- if (sal.pc == 0)
- error ("No line %d in file \"%s\".\n", sal.line, sal.symtab->filename);
- else
- {
- describe_other_breakpoints (sal.pc);
- b = set_raw_breakpoint (sal);
- b->number = ++breakpoint_count;
- b->cond = 0;
- if (tempflag)
- b->enable = temporary;
+/* This is the original v.4.16 and earlier version of the
+ catch_command_1() function. Now that other flavours of "catch"
+ have been introduced, and since exception handling can be handled
+ in other ways (through target ops) also, this is used only for the
+ GNU C++ exception handling system.
+ Note: Only the "catch" flavour of GDB 4.16 is handled here. The
+ "catch NAME" is now no longer allowed in catch_command_1(). Also,
+ there was no code in GDB 4.16 for "catch throw".
+
+ Called from catch_exception_command_1 () */
- printf ("Breakpoint %d at 0x%x", b->number, b->address);
- if (b->symtab)
- printf (": file %s, line %d.", b->symtab->filename, b->line_number);
- printf ("\n");
- }
-}
-\f
-/* Set a breakpoint according to ARG (function, linenum or *address)
- and make it temporary if TEMPFLAG is nonzero. */
static void
-break_command_1 (arg, tempflag, from_tty)
+handle_gnu_4_16_catch_command (arg, tempflag, from_tty)
char *arg;
- int tempflag, from_tty;
+ int tempflag;
+ int from_tty;
{
+ /* First, translate ARG into something we can deal with in terms
+ of breakpoints. */
+
struct symtabs_and_lines sals;
struct symtab_and_line sal;
register struct expression *cond = 0;
register struct breakpoint *b;
char *save_arg;
int i;
- CORE_ADDR pc;
-
- sals.sals = NULL;
- sals.nelts = 0;
- sal.line = sal.pc = sal.end = 0;
- sal.symtab = 0;
+ INIT_SAL (&sal); /* initialize to zeroes */
- /* If no arg given, or if first arg is 'if ', use the default breakpoint. */
+ /* If no arg given, or if first arg is 'if ', all active catch clauses
+ are breakpointed. */
if (!arg || (arg[0] == 'i' && arg[1] == 'f'
&& (arg[2] == ' ' || arg[2] == '\t')))
{
- if (default_breakpoint_valid)
- {
- sals.sals = (struct symtab_and_line *)
- malloc (sizeof (struct symtab_and_line));
- sal.pc = default_breakpoint_address;
- sal.line = default_breakpoint_line;
- sal.symtab = default_breakpoint_symtab;
- sals.sals[0] = sal;
- sals.nelts = 1;
- }
- else
- error ("No default breakpoint address now.");
+ /* Grab all active catch clauses. */
+ sals = get_catch_sals (0);
}
else
- /* Force almost all breakpoints to be in terms of the
- current_source_symtab (which is decode_line_1's default). This
- should produce the results we want almost all of the time while
- leaving default_breakpoint_* alone. */
- if (default_breakpoint_valid
- && (!current_source_symtab
- || (arg && (*arg == '+' || *arg == '-'))))
- sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
- default_breakpoint_line);
- else
- sals = decode_line_1 (&arg, 1, 0, 0);
-
+ {
+ /* Grab selected catch clauses. */
+ error ("catch NAME not implemented");
+
+#if 0
+ /* Not sure why this code has been disabled. I'm leaving
+ it disabled. We can never come here now anyway
+ since we don't allow the "catch NAME" syntax.
+ pai/1997-07-11 */
+
+ /* This isn't used; I don't know what it was for. */
+ sals = map_catch_names (arg, catch_breakpoint);
+#endif
+ }
+
if (! sals.nelts)
return;
save_arg = arg;
for (i = 0; i < sals.nelts; i++)
{
- sal = sals.sals[i];
- if (sal.pc == 0 && sal.symtab != 0)
- {
- pc = find_line_pc (sal.symtab, sal.line);
- if (pc == 0)
- error ("No line %d in file \"%s\".",
- sal.line, sal.symtab->filename);
- }
- else
- pc = sal.pc;
+ resolve_sal_pc (&sals.sals[i]);
while (arg && *arg)
{
if (arg[0] == 'i' && arg[1] == 'f'
&& (arg[2] == ' ' || arg[2] == '\t'))
- cond = (struct expression *) parse_c_1 ((arg += 2, &arg),
- block_for_pc (pc), 0);
+ cond = parse_exp_1 ((arg += 2, &arg),
+ block_for_pc (sals.sals[i].pc), 0);
else
error ("Junk at end of arguments.");
}
arg = save_arg;
- sals.sals[i].pc = pc;
}
for (i = 0; i < sals.nelts; i++)
sal = sals.sals[i];
if (from_tty)
- describe_other_breakpoints (sal.pc);
+ describe_other_breakpoints (sal.pc, sal.section);
b = set_raw_breakpoint (sal);
- b->number = ++breakpoint_count;
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->type = bp_breakpoint; /* Important -- this is an ordinary breakpoint.
+ For platforms with callback support for exceptions,
+ create_exception_catchpoint() will create special
+ bp types (bp_catch_catch and bp_catch_throw), and
+ there is code in insert_breakpoints() and elsewhere
+ that depends on that. */
+
b->cond = cond;
- if (tempflag)
- b->enable = temporary;
+ b->enable = enabled;
+ b->disposition = tempflag ? del : donttouch;
+
+ mention (b);
+ }
+
+ if (sals.nelts > 1)
+ {
+ printf_unfiltered ("Multiple breakpoints were set.\n");
+ printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
+ }
+ free ((PTR)sals.sals);
+}
+
+#if 0
+/* This creates a temporary internal breakpoint
+ just to placate infrun */
+static struct breakpoint *
+create_temp_exception_breakpoint (pc)
+ CORE_ADDR pc;
+{
+ struct symtab_and_line sal;
+ struct breakpoint *b;
+
+ INIT_SAL(&sal);
+ sal.pc = pc;
+ sal.symtab = NULL;
+ sal.line = 0;
+
+ b = set_raw_breakpoint (sal);
+ if (!b)
+ error ("Internal error -- couldn't set temp exception breakpoint");
+
+ b->type = bp_breakpoint;
+ b->disposition = del;
+ b->enable = enabled;
+ b->silent = 1;
+ b->number = internal_breakpoint_number--;
+ return b;
+}
+#endif
+
+static void
+catch_command_1 (arg, tempflag, from_tty)
+ char *arg;
+ int tempflag;
+ int from_tty;
+{
+
+ /* The first argument may be an event name, such as "start" or "load".
+ If so, then handle it as such. If it doesn't match an event name,
+ then attempt to interpret it as an exception name. (This latter is
+ the v4.16-and-earlier GDB meaning of the "catch" command.)
+
+ First, try to find the bounds of what might be an event name. */
+ char * arg1_start = arg;
+ char * arg1_end;
+ int arg1_length;
+
+ if (arg1_start == NULL)
+ {
+ /* Old behaviour was to use pre-v-4.16 syntax */
+ /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
+ /* return; */
+ /* Now, this is not allowed */
+ error ("Catch requires an event name.");
- printf ("Breakpoint %d at 0x%x", b->number, b->address);
- if (b->symtab)
- printf (": file %s, line %d.", b->symtab->filename, b->line_number);
- printf ("\n");
}
+ arg1_end = ep_find_event_name_end (arg1_start);
+ if (arg1_end == NULL)
+ error ("catch requires an event");
+ arg1_length = arg1_end + 1 - arg1_start;
+
+ /* Try to match what we found against known event names. */
+ if (strncmp (arg1_start, "signal", arg1_length) == 0)
+ {
+ error ("Catch of signal not yet implemented");
+ }
+ else if (strncmp (arg1_start, "catch", arg1_length) == 0)
+ {
+ catch_exception_command_1 (EX_EVENT_CATCH, arg1_end+1, tempflag, from_tty);
+ }
+ else if (strncmp (arg1_start, "throw", arg1_length) == 0)
+ {
+ catch_exception_command_1 (EX_EVENT_THROW, arg1_end+1, tempflag, from_tty);
+ }
+ else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
+ {
+ error ("Catch of thread_start not yet implemented");
+ }
+ else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
+ {
+ error ("Catch of thread_exit not yet implemented");
+ }
+ else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
+ {
+ error ("Catch of thread_join not yet implemented");
+ }
+ else if (strncmp (arg1_start, "start", arg1_length) == 0)
+ {
+ error ("Catch of start not yet implemented");
+ }
+ else if (strncmp (arg1_start, "exit", arg1_length) == 0)
+ {
+ error ("Catch of exit not yet implemented");
+ }
+ else if (strncmp (arg1_start, "fork", arg1_length) == 0)
+ {
+#if defined(CHILD_INSERT_FORK_CATCHPOINT)
+ catch_fork_command_1 (catch_fork, arg1_end+1, tempflag, from_tty);
+#else
+ error ("Catch of fork not yet implemented");
+#endif
+ }
+ else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
+ {
+#if defined(CHILD_INSERT_VFORK_CATCHPOINT)
+ catch_fork_command_1 (catch_vfork, arg1_end+1, tempflag, from_tty);
+#else
+ error ("Catch of vfork not yet implemented");
+#endif
+ }
+ else if (strncmp (arg1_start, "exec", arg1_length) == 0)
+ {
+#if defined(CHILD_INSERT_EXEC_CATCHPOINT)
+ catch_exec_command_1 (arg1_end+1, tempflag, from_tty);
+#else
+ error ("Catch of exec not yet implemented");
+#endif
+ }
+ else if (strncmp (arg1_start, "load", arg1_length) == 0)
+ {
+#if defined(SOLIB_ADD)
+ catch_load_command_1 (arg1_end+1, tempflag, from_tty);
+#else
+ error ("Catch of load not implemented");
+#endif
+ }
+ else if (strncmp (arg1_start, "unload", arg1_length) == 0)
+ {
+#if defined(SOLIB_ADD)
+ catch_unload_command_1 (arg1_end+1, tempflag, from_tty);
+#else
+ error ("Catch of load not implemented");
+#endif
+ }
+ else if (strncmp (arg1_start, "stop", arg1_length) == 0)
+ {
+ error ("Catch of stop not yet implemented");
+ }
+
+ /* This doesn't appear to be an event name */
- if (sals.nelts > 1)
+ else
{
- printf ("Multiple breakpoints were set.\n");
- printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
+ /* Pre-v.4.16 behaviour was to treat the argument
+ as the name of an exception */
+ /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
+ /* Now this is not allowed */
+ error ("Unknown event kind specified for catch");
+
}
- free (sals.sals);
}
+/* Used by the gui, could be made a worker for other things. */
+
+struct breakpoint *
+set_breakpoint_sal (sal)
+ struct symtab_and_line sal;
+{
+ struct breakpoint *b;
+ b = set_raw_breakpoint (sal);
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->type = bp_breakpoint;
+ b->cond = 0;
+ b->thread = -1;
+ return b;
+}
+
+#if 0
+/* These aren't used; I don't know what they were for. */
+/* Disable breakpoints on all catch clauses described in ARGS. */
static void
-break_command (arg, from_tty)
- char *arg;
- int from_tty;
+disable_catch (args)
+ char *args;
{
- break_command_1 (arg, 0, from_tty);
+ /* Map the disable command to catch clauses described in ARGS. */
}
+/* Enable breakpoints on all catch clauses described in ARGS. */
static void
-tbreak_command (arg, from_tty)
+enable_catch (args)
+ char *args;
+{
+ /* Map the disable command to catch clauses described in ARGS. */
+}
+
+/* Delete breakpoints on all catch clauses in the active scope. */
+static void
+delete_catch (args)
+ char *args;
+{
+ /* Map the delete command to catch clauses described in ARGS. */
+}
+#endif /* 0 */
+
+static void
+catch_command (arg, from_tty)
char *arg;
int from_tty;
{
- break_command_1 (arg, 1, from_tty);
+ catch_command_1 (arg, 0, from_tty);
}
\f
-/*
- * Helper routine for the until_command routine in infcmd.c. Here
- * because it uses the mechanisms of breakpoints.
- */
-void
-until_break_command (arg, from_tty)
+
+static void
+tcatch_command (arg, from_tty)
char *arg;
int from_tty;
{
- struct symtabs_and_lines sals;
- struct symtab_and_line sal;
- FRAME prev_frame = get_prev_frame (selected_frame);
+ catch_command_1 (arg, 1, from_tty);
+}
- clear_proceed_status ();
- /* Set a breakpoint where the user wants it and at return from
- this function */
-
- if (default_breakpoint_valid)
- sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
- default_breakpoint_line);
- else
- sals = decode_line_1 (&arg, 1, 0, 0);
-
- if (sals.nelts != 1)
- error ("Couldn't get information on specified line.");
-
- sal = sals.sals[0];
- free (sals.sals); /* malloc'd, so freed */
-
- if (*arg)
- error ("Junk at end of arguments.");
-
- if (sal.pc == 0 && sal.symtab != 0)
- sal.pc = find_line_pc (sal.symtab, sal.line);
-
- if (sal.pc == 0)
- error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename);
-
- set_momentary_breakpoint (sal, selected_frame);
-
- /* Keep within the current frame */
-
- if (prev_frame)
- {
- struct frame_info *fi;
-
- fi = get_frame_info (prev_frame);
- sal = find_pc_line (fi->pc, 0);
- sal.pc = fi->pc;
- set_momentary_breakpoint (sal, prev_frame);
- }
-
- proceed (-1, -1, 0);
-}
-\f
static void
clear_command (arg, from_tty)
char *arg;
int from_tty;
{
register struct breakpoint *b, *b1;
+ int default_match;
struct symtabs_and_lines sals;
struct symtab_and_line sal;
register struct breakpoint *found;
if (arg)
{
sals = decode_line_spec (arg, 1);
+ default_match = 0;
}
else
{
- sals.sals = (struct symtab_and_line *) malloc (sizeof (struct symtab_and_line));
+ sals.sals = (struct symtab_and_line *)
+ xmalloc (sizeof (struct symtab_and_line));
+ INIT_SAL (&sal); /* initialize to zeroes */
sal.line = default_breakpoint_line;
sal.symtab = default_breakpoint_symtab;
- sal.pc = 0;
+ sal.pc = default_breakpoint_address;
if (sal.symtab == 0)
error ("No source file specified.");
sals.sals[0] = sal;
sals.nelts = 1;
+
+ default_match = 1;
}
+ /* For each line spec given, delete bps which correspond
+ to it. We do this in two loops: the first loop looks at
+ the initial bp(s) in the chain which should be deleted,
+ the second goes down the rest of the chain looking ahead
+ one so it can take those bps off the chain without messing
+ up the chain. */
+
+
for (i = 0; i < sals.nelts; i++)
{
/* If exact pc given, clear bpts at that pc.
- But if sal.pc is zero, clear all bpts on specified line. */
+ If line given (pc == 0), clear all bpts on specified line.
+ If defaulting, clear all bpts on default line
+ or at default pc.
+
+ defaulting sal.pc != 0 tests to do
+
+ 0 1 pc
+ 1 1 pc _and_ line
+ 0 0 line
+ 1 0 <can't happen> */
+
sal = sals.sals[i];
found = (struct breakpoint *) 0;
+
+
while (breakpoint_chain
- && (sal.pc ? breakpoint_chain->address == sal.pc
- : (breakpoint_chain->symtab == sal.symtab
- && breakpoint_chain->line_number == sal.line)))
+ /* Why don't we check here that this is not
+ a watchpoint, etc., as we do below?
+ I can't make it fail, but don't know
+ what's stopping the failure: a watchpoint
+ of the same address as "sal.pc" should
+ wind up being deleted. */
+
+ && ( ((sal.pc && (breakpoint_chain->address == sal.pc)) &&
+ (overlay_debugging == 0 ||
+ breakpoint_chain->section == sal.section))
+ || ((default_match || (0 == sal.pc))
+ && breakpoint_chain->source_file != NULL
+ && sal.symtab != NULL
+ && STREQ (breakpoint_chain->source_file, sal.symtab->filename)
+ && breakpoint_chain->line_number == sal.line)))
+
{
b1 = breakpoint_chain;
breakpoint_chain = b1->next;
}
ALL_BREAKPOINTS (b)
- while (b->next
- && (sal.pc ? b->next->address == sal.pc
- : (b->next->symtab == sal.symtab
- && b->next->line_number == sal.line)))
+
+ while (b->next
+ && b->next->type != bp_none
+ && b->next->type != bp_watchpoint
+ && b->next->type != bp_hardware_watchpoint
+ && b->next->type != bp_read_watchpoint
+ && b->next->type != bp_access_watchpoint
+ && ( ((sal.pc && (b->next->address == sal.pc)) &&
+ (overlay_debugging == 0 ||
+ b->next->section == sal.section))
+ || ((default_match || (0 == sal.pc))
+ && b->next->source_file != NULL
+ && sal.symtab != NULL
+ && STREQ (b->next->source_file, sal.symtab->filename)
+ && b->next->line_number == sal.line)))
+
+
{
b1 = b->next;
b->next = b1->next;
}
if (found == 0)
- error ("No breakpoint at %s.", arg);
+ {
+ if (arg)
+ error ("No breakpoint at %s.", arg);
+ else
+ error ("No breakpoint at this line.");
+ }
if (found->next) from_tty = 1; /* Always report if deleted more than one */
- if (from_tty) printf ("Deleted breakpoint%s ", found->next ? "s" : "");
+ if (from_tty) printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
+ breakpoints_changed ();
while (found)
{
- if (from_tty) printf ("%d ", found->number);
+ if (from_tty) printf_unfiltered ("%d ", found->number);
b1 = found->next;
delete_breakpoint (found);
found = b1;
}
- if (from_tty) putchar ('\n');
+ if (from_tty) putchar_unfiltered ('\n');
}
- free (sals.sals);
+ free ((PTR)sals.sals);
}
\f
-/* Delete breakpoint number BNUM if it is a `delete' breakpoint.
- This is called after breakpoint BNUM has been hit.
- Also delete any breakpoint numbered -3 unless there are breakpoint
- commands to be executed. */
+/* Delete breakpoint in BS if they are `delete' breakpoints and
+ all breakpoints that are marked for deletion, whether hit or not.
+ This is called after any breakpoint is hit, or after errors. */
void
-breakpoint_auto_delete (bnum)
- int bnum;
+breakpoint_auto_delete (bs)
+ bpstat bs;
{
- register struct breakpoint *b;
- if (bnum != 0)
- ALL_BREAKPOINTS (b)
- if (b->number == bnum)
- {
- if (b->enable == delete)
- delete_breakpoint (b);
- break;
- }
- if (breakpoint_commands == 0)
- clear_momentary_breakpoints ();
+ struct breakpoint *b, *temp;
+
+ for (; bs; bs = bs->next)
+ if (bs->breakpoint_at && bs->breakpoint_at->disposition == del
+ && bs->stop)
+ delete_breakpoint (bs->breakpoint_at);
+
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ if (b->disposition == del_at_next_stop)
+ delete_breakpoint (b);
+ }
}
-static void
+/* Delete a breakpoint and clean up all traces of it in the data structures. */
+
+void
delete_breakpoint (bpt)
struct breakpoint *bpt;
{
register struct breakpoint *b;
+ register bpstat bs;
- if (bpt->inserted)
- write_memory (bpt->address, bpt->shadow_contents, sizeof break_insn);
+ if (bpt == NULL)
+ error ("Internal error (attempted to delete a NULL breakpoint)");
+
+
+ /* Has this bp already been deleted? This can happen because multiple
+ lists can hold pointers to bp's. bpstat lists are especial culprits.
+
+ One example of this happening is a watchpoint's scope bp. When the
+ scope bp triggers, we notice that the watchpoint is out of scope, and
+ delete it. We also delete its scope bp. But the scope bp is marked
+ "auto-deleting", and is already on a bpstat. That bpstat is then
+ checked for auto-deleting bp's, which are deleted.
+
+ A real solution to this problem might involve reference counts in bp's,
+ and/or giving them pointers back to their referencing bpstat's, and
+ teaching delete_breakpoint to only free a bp's storage when no more
+ references were extent. A cheaper bandaid was chosen. */
+ if (bpt->type == bp_none)
+ return;
+
+ if (delete_breakpoint_hook)
+ delete_breakpoint_hook (bpt);
+ if (bpt->inserted)
+ remove_breakpoint (bpt, mark_uninserted);
+
if (breakpoint_chain == bpt)
breakpoint_chain = bpt->next;
+ /* If we have callback-style exception catchpoints, don't go through
+ the adjustments to the C++ runtime library etc. if the inferior
+ isn't actually running. target_enable_exception_callback for a
+ null target ops vector gives an undesirable error message, so we
+ check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
+ exceptions are supported in this way, it's OK for now. FIXME */
+ if (ep_is_exception_catchpoint (bpt) && target_has_execution)
+ {
+ static char message1[] = "Error in deleting catchpoint %d:\n";
+ static char message[sizeof (message1) + 30];
+ args_for_catchpoint_enable args;
+
+ sprintf (message, message1, bpt->number); /* Format possible error msg */
+ args.kind = bpt->type == bp_catch_catch ? EX_EVENT_CATCH : EX_EVENT_THROW;
+ args.enable = 0;
+ catch_errors (cover_target_enable_exception_callback, &args,
+ message, RETURN_MASK_ALL);
+ }
+
+
ALL_BREAKPOINTS (b)
if (b->next == bpt)
{
break;
}
- check_duplicates (bpt->address);
+ /* Before turning off the visuals for the bp, check to see that
+ there are no other bps at the same address. */
+ if (tui_version)
+ {
+ int clearIt;
+
+ ALL_BREAKPOINTS (b)
+ {
+ clearIt = (b->address != bpt->address);
+ if (!clearIt)
+ break;
+ }
+
+ if (clearIt)
+ {
+ TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, bpt, 0));
+ TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos));
+ }
+ }
+
+ check_duplicates (bpt->address, bpt->section);
+ /* If this breakpoint was inserted, and there is another breakpoint
+ at the same address, we need to insert the other breakpoint. */
+ if (bpt->inserted
+ && bpt->type != bp_hardware_watchpoint
+ && bpt->type != bp_read_watchpoint
+ && bpt->type != bp_access_watchpoint
+ && bpt->type != bp_catch_fork
+ && bpt->type != bp_catch_vfork
+ && bpt->type != bp_catch_exec)
+ {
+ ALL_BREAKPOINTS (b)
+ if (b->address == bpt->address
+ && b->section == bpt->section
+ && !b->duplicate
+ && b->enable != disabled
+ && b->enable != shlib_disabled
+ && b->enable != call_disabled)
+ {
+ int val;
+ val = target_insert_breakpoint (b->address, b->shadow_contents);
+ if (val != 0)
+ {
+ target_terminal_ours_for_output ();
+ fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number);
+ memory_error (val, b->address); /* which bombs us out */
+ }
+ else
+ b->inserted = 1;
+ }
+ }
free_command_lines (&bpt->commands);
if (bpt->cond)
free (bpt->cond);
+ if (bpt->cond_string != NULL)
+ free (bpt->cond_string);
+ if (bpt->addr_string != NULL)
+ free (bpt->addr_string);
+ if (bpt->exp != NULL)
+ free (bpt->exp);
+ if (bpt->exp_string != NULL)
+ free (bpt->exp_string);
+ if (bpt->val != NULL)
+ value_free (bpt->val);
+ if (bpt->source_file != NULL)
+ free (bpt->source_file);
+ if (bpt->dll_pathname != NULL)
+ free (bpt->dll_pathname);
+ if (bpt->triggered_dll_pathname != NULL)
+ free (bpt->triggered_dll_pathname);
+ if (bpt->exec_pathname != NULL)
+ free (bpt->exec_pathname);
+
+ /* Be sure no bpstat's are pointing at it after it's been freed. */
+ /* FIXME, how can we find all bpstat's?
+ We just check stop_bpstat for now. */
+ for (bs = stop_bpstat; bs; bs = bs->next)
+ if (bs->breakpoint_at == bpt)
+ {
+ bs->breakpoint_at = NULL;
+
+ /* we'd call bpstat_clear_actions, but that free's stuff and due
+ to the multiple pointers pointing to one item with no
+ reference counts found anywhere through out the bpstat's (how
+ do you spell fragile?), we don't want to free things twice --
+ better a memory leak than a corrupt malloc pool! */
+ bs->commands = NULL;
+ bs->old_val = NULL;
+ }
+ /* On the chance that someone will soon try again to delete this same
+ bp, we mark it as deleted before freeing its storage. */
+ bpt->type = bp_none;
- if (xgdb_verbose && bpt->number >=0)
- printf ("breakpoint #%d deleted\n", bpt->number);
-
- free (bpt);
+ free ((PTR)bpt);
}
-static void map_breakpoint_numbers ();
-
-static void
+void
delete_command (arg, from_tty)
char *arg;
int from_tty;
{
- register struct breakpoint *b, *b1;
+ struct breakpoint *b, *temp;
if (arg == 0)
{
+ int breaks_to_delete = 0;
+
+ /* Delete all breakpoints if no argument.
+ Do not delete internal or call-dummy breakpoints, these
+ have to be deleted with an explicit breakpoint number argument. */
+ ALL_BREAKPOINTS (b)
+ {
+ if (b->type != bp_call_dummy &&
+ b->type != bp_shlib_event &&
+ b->number >= 0)
+ breaks_to_delete = 1;
+ }
+
/* Ask user only if there are some breakpoints to delete. */
if (!from_tty
- || breakpoint_chain && query ("Delete all breakpoints? "))
+ || (breaks_to_delete && query ("Delete all breakpoints? ")))
{
- /* No arg; clear all breakpoints. */
- while (breakpoint_chain)
- delete_breakpoint (breakpoint_chain);
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ if (b->type != bp_call_dummy &&
+ b->type != bp_shlib_event &&
+ b->number >= 0)
+ delete_breakpoint (b);
+ }
}
}
else
map_breakpoint_numbers (arg, delete_breakpoint);
}
-/* Delete all breakpoints.
- Done when new symtabs are loaded, since the break condition expressions
- may become invalid, and the breakpoints are probably wrong anyway. */
+/* Reset a breakpoint given it's struct breakpoint * BINT.
+ The value we return ends up being the return value from catch_errors.
+ Unused in this case. */
+
+static int
+breakpoint_re_set_one (bint)
+ PTR bint;
+{
+ struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */
+ struct value *mark;
+ int i;
+ struct symtabs_and_lines sals;
+ char *s;
+ enum enable save_enable;
+
+ switch (b->type)
+ {
+ case bp_none:
+ warning ("attempted to reset apparently deleted breakpoint #%d?\n", b->number);
+ return 0;
+ case bp_breakpoint:
+ case bp_hardware_breakpoint:
+ case bp_catch_load:
+ case bp_catch_unload:
+ if (b->addr_string == NULL)
+ {
+ /* Anything without a string can't be re-set. */
+ delete_breakpoint (b);
+ return 0;
+ }
+ /* In case we have a problem, disable this breakpoint. We'll restore
+ its status if we succeed. */
+ save_enable = b->enable;
+ b->enable = disabled;
+
+ set_language (b->language);
+ input_radix = b->input_radix;
+ s = b->addr_string;
+ sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0, (char ***)NULL);
+ for (i = 0; i < sals.nelts; i++)
+ {
+ resolve_sal_pc (&sals.sals[i]);
+
+ /* Reparse conditions, they might contain references to the
+ old symtab. */
+ if (b->cond_string != NULL)
+ {
+ s = b->cond_string;
+ if (b->cond)
+ free ((PTR)b->cond);
+ b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
+ }
+
+ /* We need to re-set the breakpoint if the address changes...*/
+ if (b->address != sals.sals[i].pc
+ /* ...or new and old breakpoints both have source files, and
+ the source file name or the line number changes... */
+ || (b->source_file != NULL
+ && sals.sals[i].symtab != NULL
+ && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
+ || b->line_number != sals.sals[i].line)
+ )
+ /* ...or we switch between having a source file and not having
+ one. */
+ || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
+ )
+ {
+ if (b->source_file != NULL)
+ free (b->source_file);
+ if (sals.sals[i].symtab == NULL)
+ b->source_file = NULL;
+ else
+ b->source_file =
+ savestring (sals.sals[i].symtab->filename,
+ strlen (sals.sals[i].symtab->filename));
+ b->line_number = sals.sals[i].line;
+ b->address = sals.sals[i].pc;
+
+ /* Used to check for duplicates here, but that can
+ cause trouble, as it doesn't check for disable
+ breakpoints. */
+
+ mention (b);
+
+ /* Might be better to do this just once per breakpoint_re_set,
+ rather than once for every breakpoint. */
+ breakpoints_changed ();
+ }
+ b->section = sals.sals[i].section;
+ b->enable = save_enable; /* Restore it, this worked. */
+
+
+ /* Now that this is re-enabled, check_duplicates
+ can be used. */
+ check_duplicates (b->address, b->section);
+
+ }
+ free ((PTR)sals.sals);
+ break;
+
+ case bp_watchpoint:
+ case bp_hardware_watchpoint:
+ case bp_read_watchpoint:
+ case bp_access_watchpoint:
+ innermost_block = NULL;
+ /* The issue arises of what context to evaluate this in. The same
+ one as when it was set, but what does that mean when symbols have
+ been re-read? We could save the filename and functionname, but
+ if the context is more local than that, the best we could do would
+ be something like how many levels deep and which index at that
+ particular level, but that's going to be less stable than filenames
+ or functionnames. */
+ /* So for now, just use a global context. */
+ if (b->exp)
+ free ((PTR)b->exp);
+ b->exp = parse_expression (b->exp_string);
+ b->exp_valid_block = innermost_block;
+ mark = value_mark ();
+ if (b->val)
+ value_free (b->val);
+ b->val = evaluate_expression (b->exp);
+ release_value (b->val);
+ if (VALUE_LAZY (b->val))
+ value_fetch_lazy (b->val);
+
+ if (b->cond_string != NULL)
+ {
+ s = b->cond_string;
+ if (b->cond)
+ free ((PTR)b->cond);
+ b->cond = parse_exp_1 (&s, (struct block *)0, 0);
+ }
+ if (b->enable == enabled)
+ mention (b);
+ value_free_to_mark (mark);
+ break;
+ case bp_catch_catch:
+ case bp_catch_throw:
+ break;
+ /* We needn't really do anything to reset these, since the mask
+ that requests them is unaffected by e.g., new libraries being
+ loaded. */
+ case bp_catch_fork:
+ case bp_catch_vfork:
+ case bp_catch_exec:
+ break;
+
+ default:
+ printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
+ /* fall through */
+ /* Delete longjmp breakpoints, they will be reset later by
+ breakpoint_re_set. */
+ case bp_longjmp:
+ case bp_longjmp_resume:
+ delete_breakpoint (b);
+ break;
+
+ /* This breakpoint is special, it's set up when the inferior
+ starts and we really don't want to touch it. */
+ case bp_shlib_event:
+
+ /* Keep temporary breakpoints, which can be encountered when we step
+ over a dlopen call and SOLIB_ADD is resetting the breakpoints.
+ Otherwise these should have been blown away via the cleanup chain
+ or by breakpoint_init_inferior when we rerun the executable. */
+ case bp_until:
+ case bp_finish:
+ case bp_watchpoint_scope:
+ case bp_call_dummy:
+ case bp_step_resume:
+ break;
+ }
+
+ return 0;
+}
+/* Re-set all breakpoints after symbols have been re-loaded. */
void
-clear_breakpoints ()
+breakpoint_re_set ()
{
- delete_command (0, 0);
+ struct breakpoint *b, *temp;
+ enum language save_language;
+ int save_input_radix;
+ static char message1[] = "Error in re-setting breakpoint %d:\n";
+ char message[sizeof (message1) + 30 /* slop */];
+
+ save_language = current_language->la_language;
+ save_input_radix = input_radix;
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ sprintf (message, message1, b->number); /* Format possible error msg */
+ catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
+ }
+ set_language (save_language);
+ input_radix = save_input_radix;
+
+#ifdef GET_LONGJMP_TARGET
+ create_longjmp_breakpoint ("longjmp");
+ create_longjmp_breakpoint ("_longjmp");
+ create_longjmp_breakpoint ("siglongjmp");
+ create_longjmp_breakpoint ("_siglongjmp");
+ create_longjmp_breakpoint (NULL);
+#endif
+
+#if 0
+ /* Took this out (temporarily at least), since it produces an extra
+ blank line at startup. This messes up the gdbtests. -PB */
+ /* Blank line to finish off all those mention() messages we just printed. */
+ printf_filtered ("\n");
+#endif
}
\f
/* Set ignore-count of breakpoint number BPTNUM to COUNT.
If from_tty is nonzero, it prints a message to that effect,
which ends with a period (no newline). */
+/* Reset the thread number of this breakpoint:
+
+ - If the breakpoint is for all threads, leave it as-is.
+ - Else, reset it to the current thread for inferior_pid. */
+void
+breakpoint_re_set_thread (b)
+ struct breakpoint * b;
+{
+ if (b->thread != -1)
+ {
+ if (in_thread_list (inferior_pid))
+ b->thread = pid_to_thread_id (inferior_pid);
+ }
+}
+
void
set_ignore_count (bptnum, count, from_tty)
int bptnum, count, from_tty;
if (!from_tty)
return;
else if (count == 0)
- printf ("Will stop next time breakpoint %d is reached.", bptnum);
+ printf_filtered ("Will stop next time breakpoint %d is reached.",
+ bptnum);
else if (count == 1)
- printf ("Will ignore next crossing of breakpoint %d.", bptnum);
+ printf_filtered ("Will ignore next crossing of breakpoint %d.",
+ bptnum);
else
- printf ("Will ignore next %d crossings of breakpoint %d.",
+ printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
count, bptnum);
+ breakpoints_changed ();
return;
}
char *args;
int from_tty;
{
- register char *p = args;
+ char *p = args;
register int num;
if (p == 0)
error_no_arg ("a breakpoint number");
- while (*p >= '0' && *p <= '9') p++;
- if (*p && *p != ' ' && *p != '\t')
- error ("First argument must be a breakpoint number.");
-
- num = atoi (args);
+ num = get_number (&p);
if (*p == 0)
error ("Second argument (specified ignore-count) is missing.");
- set_ignore_count (num, parse_and_eval_address (p), from_tty);
- printf ("\n");
+ set_ignore_count (num,
+ longest_to_int (value_as_long (parse_and_eval (p))),
+ from_tty);
+ printf_filtered ("\n");
+ breakpoints_changed ();
}
\f
/* Call FUNCTION on each of the breakpoints
static void
map_breakpoint_numbers (args, function)
char *args;
- void (*function) ();
+ void (*function) PARAMS ((struct breakpoint *));
{
register char *p = args;
- register char *p1;
+ char *p1;
register int num;
register struct breakpoint *b;
while (*p)
{
p1 = p;
- while (*p1 >= '0' && *p1 <= '9') p1++;
- if (*p1 && *p1 != ' ' && *p1 != '\t')
- error ("Arguments must be breakpoint numbers.");
-
- num = atoi (p);
+
+ num = get_number (&p1);
ALL_BREAKPOINTS (b)
if (b->number == num)
{
+ struct breakpoint *related_breakpoint = b->related_breakpoint;
function (b);
+ if (related_breakpoint)
+ function (related_breakpoint);
goto win;
}
- printf ("No breakpoint number %d.\n", num);
+ printf_unfiltered ("No breakpoint number %d.\n", num);
win:
p = p1;
- while (*p == ' ' || *p == '\t') p++;
}
}
-static void
-enable_breakpoint (bpt)
+void
+disable_breakpoint (bpt)
struct breakpoint *bpt;
{
- bpt->enable = enabled;
+ /* Never disable a watchpoint scope breakpoint; we want to
+ hit them when we leave scope so we can delete both the
+ watchpoint and its scope breakpoint at that time. */
+ if (bpt->type == bp_watchpoint_scope)
+ return;
+
+ bpt->enable = disabled;
- if (xgdb_verbose && bpt->number >= 0)
- printf ("breakpoint #%d enabled\n", bpt->number);
+ check_duplicates (bpt->address, bpt->section);
- check_duplicates (bpt->address);
+ if (modify_breakpoint_hook)
+ modify_breakpoint_hook (bpt);
}
+/* ARGSUSED */
static void
-enable_command (args)
+disable_command (args, from_tty)
char *args;
+ int from_tty;
{
- struct breakpoint *bpt;
+ register struct breakpoint *bpt;
if (args == 0)
ALL_BREAKPOINTS (bpt)
- enable_breakpoint (bpt);
+ switch (bpt->type)
+ {
+ case bp_none:
+ warning ("attempted to disable apparently deleted breakpoint #%d?\n", bpt->number);
+ continue;
+ case bp_breakpoint:
+ case bp_catch_load:
+ case bp_catch_unload:
+ case bp_catch_fork:
+ case bp_catch_vfork:
+ case bp_catch_exec:
+ case bp_catch_catch:
+ case bp_catch_throw:
+ case bp_hardware_breakpoint:
+ case bp_watchpoint:
+ case bp_hardware_watchpoint:
+ case bp_read_watchpoint:
+ case bp_access_watchpoint:
+ disable_breakpoint (bpt);
+ default:
+ continue;
+ }
else
- map_breakpoint_numbers (args, enable_breakpoint);
+ map_breakpoint_numbers (args, disable_breakpoint);
}
static void
-disable_breakpoint (bpt)
+do_enable_breakpoint (bpt, disposition)
struct breakpoint *bpt;
+ enum bpdisp disposition;
{
- bpt->enable = disabled;
+ struct frame_info *save_selected_frame = NULL;
+ int save_selected_frame_level = -1;
+ int target_resources_ok, other_type_used;
+ struct value *mark;
+
+ if (bpt->type == bp_hardware_breakpoint)
+ {
+ int i;
+ i = hw_breakpoint_used_count();
+ target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
+ bp_hardware_breakpoint, i+1, 0);
+ if (target_resources_ok == 0)
+ error ("No hardware breakpoint support in the target.");
+ else if (target_resources_ok < 0)
+ error ("Hardware breakpoints used exceeds limit.");
+ }
+
+ bpt->enable = enabled;
+ bpt->disposition = disposition;
+ check_duplicates (bpt->address, bpt->section);
+ breakpoints_changed ();
+
+ if (bpt->type == bp_watchpoint || bpt->type == bp_hardware_watchpoint ||
+ bpt->type == bp_read_watchpoint || bpt->type == bp_access_watchpoint)
+ {
+ if (bpt->exp_valid_block != NULL)
+ {
+ struct frame_info *fr =
+
+ /* Ensure that we have the current frame. Else, this
+ next query may pessimistically be answered as, "No,
+ not within current scope". */
+ get_current_frame ();
+ fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame);
+ if (fr == NULL)
+ {
+ printf_filtered ("\
+Cannot enable watchpoint %d because the block in which its expression\n\
+is valid is not currently in scope.\n", bpt->number);
+ bpt->enable = disabled;
+ return;
+ }
+
+ save_selected_frame = selected_frame;
+ save_selected_frame_level = selected_frame_level;
+ select_frame (fr, -1);
+ }
- if (xgdb_verbose && bpt->number >= 0)
- printf ("breakpoint #%d disabled\n", bpt->number);
+ value_free (bpt->val);
+ mark = value_mark ();
+ bpt->val = evaluate_expression (bpt->exp);
+ release_value (bpt->val);
+ if (VALUE_LAZY (bpt->val))
+ value_fetch_lazy (bpt->val);
- check_duplicates (bpt->address);
+ if (bpt->type == bp_hardware_watchpoint ||
+ bpt->type == bp_read_watchpoint ||
+ bpt->type == bp_access_watchpoint)
+ {
+ int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
+ int mem_cnt = can_use_hardware_watchpoint (bpt->val);
+
+ /* Hack around 'unused var' error for some targets here */
+ (void) mem_cnt, i;
+ target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
+ bpt->type, i + mem_cnt, other_type_used);
+ /* we can consider of type is bp_hardware_watchpoint, convert to
+ bp_watchpoint in the following condition */
+ if (target_resources_ok < 0)
+ {
+ printf_filtered("\
+Cannot enable watchpoint %d because target watch resources\n\
+have been allocated for other watchpoints.\n", bpt->number);
+ bpt->enable = disabled;
+ value_free_to_mark (mark);
+ return;
+ }
+ }
+
+ if (save_selected_frame_level >= 0)
+ select_and_print_frame (save_selected_frame, save_selected_frame_level);
+ value_free_to_mark (mark);
+ }
+ if (modify_breakpoint_hook)
+ modify_breakpoint_hook (bpt);
+}
+
+void
+enable_breakpoint (bpt)
+ struct breakpoint *bpt;
+{
+ do_enable_breakpoint (bpt, bpt->disposition);
}
+/* The enable command enables the specified breakpoints (or all defined
+ breakpoints) so they once again become (or continue to be) effective
+ in stopping the inferior. */
+
+/* ARGSUSED */
static void
-disable_command (args)
+enable_command (args, from_tty)
char *args;
+ int from_tty;
{
register struct breakpoint *bpt;
if (args == 0)
ALL_BREAKPOINTS (bpt)
- disable_breakpoint (bpt);
+ switch (bpt->type)
+ {
+ case bp_none:
+ warning ("attempted to enable apparently deleted breakpoint #%d?\n", bpt->number);
+ continue;
+ case bp_breakpoint:
+ case bp_catch_load:
+ case bp_catch_unload:
+ case bp_catch_fork:
+ case bp_catch_vfork:
+ case bp_catch_exec:
+ case bp_catch_catch:
+ case bp_catch_throw:
+ case bp_hardware_breakpoint:
+ case bp_watchpoint:
+ case bp_hardware_watchpoint:
+ case bp_read_watchpoint:
+ case bp_access_watchpoint:
+ enable_breakpoint (bpt);
+ default:
+ continue;
+ }
else
- map_breakpoint_numbers (args, disable_breakpoint);
+ map_breakpoint_numbers (args, enable_breakpoint);
}
static void
enable_once_breakpoint (bpt)
struct breakpoint *bpt;
{
- bpt->enable = temporary;
-
- check_duplicates (bpt->address);
+ do_enable_breakpoint (bpt, disable);
}
+/* ARGSUSED */
static void
-enable_once_command (args)
+enable_once_command (args, from_tty)
char *args;
+ int from_tty;
{
map_breakpoint_numbers (args, enable_once_breakpoint);
}
enable_delete_breakpoint (bpt)
struct breakpoint *bpt;
{
- bpt->enable = delete;
-
- check_duplicates (bpt->address);
+ do_enable_breakpoint (bpt, del);
}
+/* ARGSUSED */
static void
-enable_delete_command (args)
+enable_delete_command (args, from_tty)
char *args;
+ int from_tty;
{
map_breakpoint_numbers (args, enable_delete_breakpoint);
}
\f
-/*
- * Use default_breakpoint_'s, or nothing if they aren't valid.
- */
+/* Use default_breakpoint_'s, or nothing if they aren't valid. */
+
struct symtabs_and_lines
decode_line_spec_1 (string, funfirstline)
char *string;
error ("Empty line specification.");
if (default_breakpoint_valid)
sals = decode_line_1 (&string, funfirstline,
- default_breakpoint_symtab, default_breakpoint_line);
+ default_breakpoint_symtab, default_breakpoint_line,
+ (char ***)NULL);
else
- sals = decode_line_1 (&string, funfirstline, 0, 0);
+ sals = decode_line_1 (&string, funfirstline,
+ (struct symtab *)NULL, 0, (char ***)NULL);
if (*string)
error ("Junk at end of line specification: %s", string);
return sals;
}
\f
-
-/* Chain containing all defined enable commands. */
-
-extern struct cmd_list_element
- *enablelist, *disablelist,
- *deletelist, *enablebreaklist;
-
-extern struct cmd_list_element *cmdlist;
-
void
_initialize_breakpoint ()
{
+ struct cmd_list_element *c;
+
breakpoint_chain = 0;
+ /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
+ before a breakpoint is set. */
breakpoint_count = 0;
add_com ("ignore", class_breakpoint, ignore_command,
- "Set ignore-count of breakpoint number N to COUNT.");
+ "Set ignore-count of breakpoint number N to COUNT.\n\
+Usage is `ignore N COUNT'.");
+ if (xdb_commands)
+ add_com_alias("bc", "ignore", class_breakpoint, 1);
add_com ("commands", class_breakpoint, commands_command,
"Set commands to be executed when a breakpoint is hit.\n\
add_com ("condition", class_breakpoint, condition_command,
"Specify breakpoint number N to break only if COND is true.\n\
-N is an integer; COND is a C expression to be evaluated whenever\n\
-breakpoint N is reached. Actually break only when COND is nonzero.");
+Usage is `condition N COND', where N is an integer and COND is an\n\
+expression to be evaluated whenever breakpoint N is reached. ");
add_com ("tbreak", class_breakpoint, tbreak_command,
"Set a temporary breakpoint. Args like \"break\" command.\n\
-Like \"break\" except the breakpoint is only enabled temporarily,\n\
-so it will be disabled when hit. Equivalent to \"break\" followed\n\
-by using \"enable once\" on the breakpoint number.");
+Like \"break\" except the breakpoint is only temporary,\n\
+so it will be deleted when hit. Equivalent to \"break\" followed\n\
+by using \"enable delete\" on the breakpoint number.");
+ add_com("txbreak", class_breakpoint, tbreak_at_finish_command,
+ "Set temporary breakpoint at procedure exit. Either there should\n\
+be no argument or the argument must be a depth.\n");
+
+ add_com ("hbreak", class_breakpoint, hbreak_command,
+ "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
+Like \"break\" except the breakpoint requires hardware support,\n\
+some target hardware may not have this support.");
+
+ add_com ("thbreak", class_breakpoint, thbreak_command,
+ "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
+Like \"hbreak\" except the breakpoint is only temporary,\n\
+so it will be deleted when hit.");
add_prefix_cmd ("enable", class_breakpoint, enable_command,
- "Enable some breakpoints or auto-display expressions.\n\
+ "Enable some breakpoints.\n\
Give breakpoint numbers (separated by spaces) as arguments.\n\
With no subcommand, breakpoints are enabled until you command otherwise.\n\
This is used to cancel the effect of the \"disable\" command.\n\
-With a subcommand you can enable temporarily.\n\
-\n\
-The \"display\" subcommand applies to auto-displays instead of breakpoints.",
+With a subcommand you can enable temporarily.",
&enablelist, "enable ", 1, &cmdlist);
+ if (xdb_commands)
+ add_com("ab", class_breakpoint, enable_command,
+ "Enable some breakpoints.\n\
+Give breakpoint numbers (separated by spaces) as arguments.\n\
+With no subcommand, breakpoints are enabled until you command otherwise.\n\
+This is used to cancel the effect of the \"disable\" command.\n\
+With a subcommand you can enable temporarily.");
+
+ add_com_alias ("en", "enable", class_breakpoint, 1);
add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
- "Enable some breakpoints or auto-display expressions.\n\
+ "Enable some breakpoints.\n\
Give breakpoint numbers (separated by spaces) as arguments.\n\
-With no subcommand, breakpoints are enabled until you command otherwise.\n\
This is used to cancel the effect of the \"disable\" command.\n\
-May be abbreviates to simply \"enable\".\n\
-With a subcommand you can enable temporarily.",
+May be abbreviated to simply \"enable\".\n",
&enablebreaklist, "enable breakpoints ", 1, &enablelist);
add_cmd ("once", no_class, enable_once_command,
"Enable breakpoints for one hit. Give breakpoint numbers.\n\
-If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\
-See the \"tbreak\" command which sets a breakpoint and enables it once.",
+If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
&enablebreaklist);
add_cmd ("delete", no_class, enable_delete_command,
add_cmd ("once", no_class, enable_once_command,
"Enable breakpoints for one hit. Give breakpoint numbers.\n\
-If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\
-See the \"tbreak\" command which sets a breakpoint and enables it once.",
+If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
&enablelist);
add_prefix_cmd ("disable", class_breakpoint, disable_command,
- "Disable some breakpoints or auto-display expressions.\n\
+ "Disable some breakpoints.\n\
Arguments are breakpoint numbers with spaces in between.\n\
To disable all breakpoints, give no argument.\n\
-A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
-\n\
-The \"display\" subcommand applies to auto-displays instead of breakpoints.",
+A disabled breakpoint is not forgotten, but has no effect until reenabled.",
&disablelist, "disable ", 1, &cmdlist);
add_com_alias ("dis", "disable", class_breakpoint, 1);
add_com_alias ("disa", "disable", class_breakpoint, 1);
+ if (xdb_commands)
+ add_com("sb", class_breakpoint, disable_command,
+ "Disable some breakpoints.\n\
+Arguments are breakpoint numbers with spaces in between.\n\
+To disable all breakpoints, give no argument.\n\
+A disabled breakpoint is not forgotten, but has no effect until reenabled.");
- add_abbrev_cmd ("breakpoints", class_breakpoint, disable_command,
- "Disable some breakpoints or auto-display expressions.\n\
+ add_cmd ("breakpoints", class_alias, disable_command,
+ "Disable some breakpoints.\n\
Arguments are breakpoint numbers with spaces in between.\n\
To disable all breakpoints, give no argument.\n\
A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
The \"unset\" command is also an alias for \"delete\".",
&deletelist, "delete ", 1, &cmdlist);
add_com_alias ("d", "delete", class_breakpoint, 1);
- add_com_alias ("unset", "delete", class_alias, 1);
+ if (xdb_commands)
+ add_com ("db", class_breakpoint, delete_command,
+ "Delete some breakpoints.\n\
+Arguments are breakpoint numbers with spaces in between.\n\
+To delete all breakpoints, give no argument.\n");
add_cmd ("breakpoints", class_alias, delete_command,
"Delete some breakpoints or auto-display expressions.\n\
&deletelist);
add_com ("clear", class_breakpoint, clear_command,
- "Clear breakpoint at specified line or function.\n\
+ concat ("Clear breakpoint at specified line or function.\n\
Argument may be line number, function name, or \"*\" and an address.\n\
If line number is specified, all breakpoints in that line are cleared.\n\
If function is specified, breakpoints at beginning of function are cleared.\n\
-If an address is specified, breakpoints at that address are cleared.\n\n\
-With no argument, clears all breakpoints in the line that the selected frame\n\
+If an address is specified, breakpoints at that address are cleared.\n\n",
+"With no argument, clears all breakpoints in the line that the selected frame\n\
is executing in.\n\
\n\
-See also the \"delete\" command which clears breakpoints by number.");
+See also the \"delete\" command which clears breakpoints by number.", NULL));
add_com ("break", class_breakpoint, break_command,
- "Set breakpoint at specified line or function.\n\
+ concat ("Set breakpoint at specified line or function.\n\
Argument may be line number, function name, or \"*\" and an address.\n\
If line number is specified, break at start of code for that line.\n\
If function is specified, break at start of code for that function.\n\
-If an address is specified, break at that exact address.\n\
-With no arg, uses current execution address of selected stack frame.\n\
+If an address is specified, break at that exact address.\n",
+"With no arg, uses current execution address of selected stack frame.\n\
This is useful for breaking on return to a stack frame.\n\
\n\
Multiple breakpoints at one place are permitted, and useful if conditional.\n\
\n\
-Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
+Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
add_com_alias ("b", "break", class_run, 1);
add_com_alias ("br", "break", class_run, 1);
add_com_alias ("bre", "break", class_run, 1);
add_com_alias ("brea", "break", class_run, 1);
+ add_com("xbreak", class_breakpoint, break_at_finish_command,
+ concat("Set breakpoint at procedure exit. \n\
+Argument may be function name, or \"*\" and an address.\n\
+If function is specified, break at end of code for that function.\n\
+If an address is specified, break at the end of the function that contains \n\
+that exact address.\n",
+"With no arg, uses current execution address of selected stack frame.\n\
+This is useful for breaking on return to a stack frame.\n\
+\n\
+Multiple breakpoints at one place are permitted, and useful if conditional.\n\
+\n\
+Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
+ add_com_alias ("xb", "xbreak", class_breakpoint, 1);
+ add_com_alias ("xbr", "xbreak", class_breakpoint, 1);
+ add_com_alias ("xbre", "xbreak", class_breakpoint, 1);
+ add_com_alias ("xbrea", "xbreak", class_breakpoint, 1);
+
+ if (xdb_commands)
+ {
+ add_com_alias ("ba", "break", class_breakpoint, 1);
+ add_com_alias ("bu", "ubreak", class_breakpoint, 1);
+ add_com ("bx", class_breakpoint, break_at_finish_at_depth_command,
+ "Set breakpoint at procedure exit. Either there should\n\
+be no argument or the argument must be a depth.\n");
+ }
+
+ if (dbx_commands)
+ {
+ add_abbrev_prefix_cmd("stop", class_breakpoint, stop_command,
+ "Break in function/address or break at a line in the current file.",
+ &stoplist, "stop ", 1, &cmdlist);
+ add_cmd("in", class_breakpoint, stopin_command,
+ "Break in function or address.\n", &stoplist);
+ add_cmd("at", class_breakpoint, stopat_command,
+ "Break at a line in the current file.\n", &stoplist);
+ add_com("status", class_info, breakpoints_info,
+ concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
+The \"Type\" column indicates one of:\n\
+\tbreakpoint - normal breakpoint\n\
+\twatchpoint - watchpoint\n\
+The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
+the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
+breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
+address and file/line number respectively.\n\n",
+"Convenience variable \"$_\" and default examine address for \"x\"\n\
+are set to the address of the last breakpoint listed.\n\n\
+Convenience variable \"$bpnum\" contains the number of the last\n\
+breakpoint set.", NULL));
+ }
+
add_info ("breakpoints", breakpoints_info,
- "Status of all breakpoints, or breakpoint number NUMBER.\n\
-Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\
-\"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\
-Then come the address and the file/line number.\n\n\
-Convenience variable \"$_\" and default examine address for \"x\"\n\
-are set to the address of the last breakpoint listed.");
+ concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
+The \"Type\" column indicates one of:\n\
+\tbreakpoint - normal breakpoint\n\
+\twatchpoint - watchpoint\n\
+The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
+the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
+breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
+address and file/line number respectively.\n\n",
+"Convenience variable \"$_\" and default examine address for \"x\"\n\
+are set to the address of the last breakpoint listed.\n\n\
+Convenience variable \"$bpnum\" contains the number of the last\n\
+breakpoint set.", NULL));
+
+ if (xdb_commands)
+ add_com("lb", class_breakpoint, breakpoints_info,
+ concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
+The \"Type\" column indicates one of:\n\
+\tbreakpoint - normal breakpoint\n\
+\twatchpoint - watchpoint\n\
+The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
+the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
+breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
+address and file/line number respectively.\n\n",
+"Convenience variable \"$_\" and default examine address for \"x\"\n\
+are set to the address of the last breakpoint listed.\n\n\
+Convenience variable \"$bpnum\" contains the number of the last\n\
+breakpoint set.", NULL));
+
+#if MAINTENANCE_CMDS
+
+ add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
+ concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
+The \"Type\" column indicates one of:\n\
+\tbreakpoint - normal breakpoint\n\
+\twatchpoint - watchpoint\n\
+\tlongjmp - internal breakpoint used to step through longjmp()\n\
+\tlongjmp resume - internal breakpoint at the target of longjmp()\n\
+\tuntil - internal breakpoint used by the \"until\" command\n\
+\tfinish - internal breakpoint used by the \"finish\" command\n",
+"The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
+the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
+breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
+address and file/line number respectively.\n\n",
+"Convenience variable \"$_\" and default examine address for \"x\"\n\
+are set to the address of the last breakpoint listed.\n\n\
+Convenience variable \"$bpnum\" contains the number of the last\n\
+breakpoint set.", NULL),
+ &maintenanceinfolist);
+
+#endif /* MAINTENANCE_CMDS */
+
+ add_com ("catch", class_breakpoint, catch_command,
+ "Set catchpoints to catch events.\n\
+Raised signals may be caught:\n\
+\tcatch signal - all signals\n\
+\tcatch signal <signame> - a particular signal\n\
+Raised exceptions may be caught:\n\
+\tcatch throw - all exceptions, when thrown\n\
+\tcatch throw <exceptname> - a particular exception, when thrown\n\
+\tcatch catch - all exceptions, when caught\n\
+\tcatch catch <exceptname> - a particular exception, when caught\n\
+Thread or process events may be caught:\n\
+\tcatch thread_start - any threads, just after creation\n\
+\tcatch thread_exit - any threads, just before expiration\n\
+\tcatch thread_join - any threads, just after joins\n\
+Process events may be caught:\n\
+\tcatch start - any processes, just after creation\n\
+\tcatch exit - any processes, just before expiration\n\
+\tcatch fork - calls to fork()\n\
+\tcatch vfork - calls to vfork()\n\
+\tcatch exec - calls to exec()\n\
+Dynamically-linked library events may be caught:\n\
+\tcatch load - loads of any library\n\
+\tcatch load <libname> - loads of a particular library\n\
+\tcatch unload - unloads of any library\n\
+\tcatch unload <libname> - unloads of a particular library\n\
+The act of your program's execution stopping may also be caught:\n\
+\tcatch stop\n\n\
+C++ exceptions may be caught:\n\
+\tcatch throw - all exceptions, when thrown\n\
+\tcatch catch - all exceptions, when caught\n\
+\n\
+Do \"help set follow-fork-mode\" for info on debugging your program\n\
+after a fork or vfork is caught.\n\n\
+Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
+
+ add_com ("tcatch", class_breakpoint, tcatch_command,
+ "Set temporary catchpoints to catch events.\n\
+Args like \"catch\" command.\n\
+Like \"catch\" except the catchpoint is only temporary,\n\
+so it will be deleted when hit. Equivalent to \"catch\" followed\n\
+by using \"enable delete\" on the catchpoint number.");
+
+add_com ("watch", class_breakpoint, watch_command,
+
+ "Set a watchpoint for an expression.\n\
+A watchpoint stops execution of your program whenever the value of\n\
+an expression changes.");
+
+ add_com ("rwatch", class_breakpoint, rwatch_command,
+ "Set a read watchpoint for an expression.\n\
+A watchpoint stops execution of your program whenever the value of\n\
+an expression is read.");
+
+ add_com ("awatch", class_breakpoint, awatch_command,
+ "Set a watchpoint for an expression.\n\
+A watchpoint stops execution of your program whenever the value of\n\
+an expression is either read or written.");
+
+ add_info ("watchpoints", breakpoints_info,
+ "Synonym for ``info breakpoints''.");
+
+
+ c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
+ (char *) &can_use_hw_watchpoints,
+ "Set debugger's willingness to use watchpoint hardware.\n\
+If zero, gdb will not use hardware for new watchpoints, even if\n\
+such is available. (However, any hardware watchpoints that were\n\
+created before setting this to nonzero, will continue to use watchpoint\n\
+hardware.)",
+ &setlist);
+ add_show_from_set (c, &showlist);
+
+ can_use_hw_watchpoints = 1;
}
-
projects / thirdparty / binutils-gdb.git / blobdiff