/* Process record and replay target for GDB, the GNU debugger.
- Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 2008-2016 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "gdbcmd.h"
-#include "regcache.h"
-#include "gdbthread.h"
-#include "event-top.h"
-#include "exceptions.h"
#include "completer.h"
-#include "arch-utils.h"
-#include "gdbcore.h"
-#include "exec.h"
#include "record.h"
-#include "elf-bfd.h"
-#include "gcore.h"
+#include "observer.h"
+#include "inferior.h"
+#include "common/common-utils.h"
+#include "cli/cli-utils.h"
+#include "disasm.h"
-#include <signal.h>
-
-/* This module implements "target record", also known as "process
- record and replay". This target sits on top of a "normal" target
- (a target that "has execution"), and provides a record and replay
- functionality, including reverse debugging.
-
- Target record has two modes: recording, and replaying.
-
- In record mode, we intercept the to_resume and to_wait methods.
- Whenever gdb resumes the target, we run the target in single step
- mode, and we build up an execution log in which, for each executed
- instruction, we record all changes in memory and register state.
- This is invisible to the user, to whom it just looks like an
- ordinary debugging session (except for performance degredation).
-
- In replay mode, instead of actually letting the inferior run as a
- process, we simulate its execution by playing back the recorded
- execution log. For each instruction in the log, we simulate the
- instruction's side effects by duplicating the changes that it would
- have made on memory and registers. */
-
-#define DEFAULT_RECORD_INSN_MAX_NUM 200000
-
-#define RECORD_IS_REPLAY \
- (record_list->next || execution_direction == EXEC_REVERSE)
-
-#define RECORD_FILE_MAGIC netorder32(0x20091016)
-
-/* These are the core structs of the process record functionality.
-
- A record_entry is a record of the value change of a register
- ("record_reg") or a part of memory ("record_mem"). And each
- instruction must have a struct record_entry ("record_end") that
- indicates that this is the last struct record_entry of this
- instruction.
-
- Each struct record_entry is linked to "record_list" by "prev" and
- "next" pointers. */
-
-struct record_mem_entry
-{
- CORE_ADDR addr;
- int len;
- /* Set this flag if target memory for this entry
- can no longer be accessed. */
- int mem_entry_not_accessible;
- union
- {
- gdb_byte *ptr;
- gdb_byte buf[sizeof (gdb_byte *)];
- } u;
-};
-
-struct record_reg_entry
-{
- unsigned short num;
- unsigned short len;
- union
- {
- gdb_byte *ptr;
- gdb_byte buf[2 * sizeof (gdb_byte *)];
- } u;
-};
-
-struct record_end_entry
-{
- enum target_signal sigval;
- ULONGEST insn_num;
-};
-
-enum record_type
-{
- record_end = 0,
- record_reg,
- record_mem
-};
-
-/* This is the data structure that makes up the execution log.
-
- The execution log consists of a single linked list of entries
- of type "struct record_entry". It is doubly linked so that it
- can be traversed in either direction.
-
- The start of the list is anchored by a struct called
- "record_first". The pointer "record_list" either points to the
- last entry that was added to the list (in record mode), or to the
- next entry in the list that will be executed (in replay mode).
-
- Each list element (struct record_entry), in addition to next and
- prev pointers, consists of a union of three entry types: mem, reg,
- and end. A field called "type" determines which entry type is
- represented by a given list element.
-
- Each instruction that is added to the execution log is represented
- by a variable number of list elements ('entries'). The instruction
- will have one "reg" entry for each register that is changed by
- executing the instruction (including the PC in every case). It
- will also have one "mem" entry for each memory change. Finally,
- each instruction will have an "end" entry that separates it from
- the changes associated with the next instruction. */
-
-struct record_entry
-{
- struct record_entry *prev;
- struct record_entry *next;
- enum record_type type;
- union
- {
- /* reg */
- struct record_reg_entry reg;
- /* mem */
- struct record_mem_entry mem;
- /* end */
- struct record_end_entry end;
- } u;
-};
+#include <ctype.h>
/* This is the debug switch for process record. */
-int record_debug = 0;
-
-/* If true, query if PREC cannot record memory
- change of next instruction. */
-int record_memory_query = 0;
-
-struct record_core_buf_entry
-{
- struct record_core_buf_entry *prev;
- struct target_section *p;
- bfd_byte *buf;
-};
-
-/* Record buf with core target. */
-static gdb_byte *record_core_regbuf = NULL;
-static struct target_section *record_core_start;
-static struct target_section *record_core_end;
-static struct record_core_buf_entry *record_core_buf_list = NULL;
-
-/* The following variables are used for managing the linked list that
- represents the execution log.
-
- record_first is the anchor that holds down the beginning of the list.
-
- record_list serves two functions:
- 1) In record mode, it anchors the end of the list.
- 2) In replay mode, it traverses the list and points to
- the next instruction that must be emulated.
-
- record_arch_list_head and record_arch_list_tail are used to manage
- a separate list, which is used to build up the change elements of
- the currently executing instruction during record mode. When this
- instruction has been completely annotated in the "arch list", it
- will be appended to the main execution log. */
-
-static struct record_entry record_first;
-static struct record_entry *record_list = &record_first;
-static struct record_entry *record_arch_list_head = NULL;
-static struct record_entry *record_arch_list_tail = NULL;
-
-/* 1 ask user. 0 auto delete the last struct record_entry. */
-static int record_stop_at_limit = 1;
-/* Maximum allowed number of insns in execution log. */
-static unsigned int record_insn_max_num = DEFAULT_RECORD_INSN_MAX_NUM;
-/* Actual count of insns presently in execution log. */
-static int record_insn_num = 0;
-/* Count of insns logged so far (may be larger
- than count of insns presently in execution log). */
-static ULONGEST record_insn_count;
-
-/* The target_ops of process record. */
-static struct target_ops record_ops;
-static struct target_ops record_core_ops;
-
-/* The beneath function pointers. */
-static struct target_ops *record_beneath_to_resume_ops;
-static void (*record_beneath_to_resume) (struct target_ops *, ptid_t, int,
- enum target_signal);
-static struct target_ops *record_beneath_to_wait_ops;
-static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t,
- struct target_waitstatus *,
- int);
-static struct target_ops *record_beneath_to_store_registers_ops;
-static void (*record_beneath_to_store_registers) (struct target_ops *,
- struct regcache *,
- int regno);
-static struct target_ops *record_beneath_to_xfer_partial_ops;
-static LONGEST (*record_beneath_to_xfer_partial) (struct target_ops *ops,
- enum target_object object,
- const char *annex,
- gdb_byte *readbuf,
- const gdb_byte *writebuf,
- ULONGEST offset,
- LONGEST len);
-static int (*record_beneath_to_insert_breakpoint) (struct gdbarch *,
- struct bp_target_info *);
-static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *,
- struct bp_target_info *);
-static int (*record_beneath_to_stopped_by_watchpoint) (void);
-static int (*record_beneath_to_stopped_data_address) (struct target_ops *,
- CORE_ADDR *);
-
-/* Alloc and free functions for record_reg, record_mem, and record_end
- entries. */
-
-/* Alloc a record_reg record entry. */
-
-static inline struct record_entry *
-record_reg_alloc (struct regcache *regcache, int regnum)
-{
- struct record_entry *rec;
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
-
- rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry));
- rec->type = record_reg;
- rec->u.reg.num = regnum;
- rec->u.reg.len = register_size (gdbarch, regnum);
- if (rec->u.reg.len > sizeof (rec->u.reg.u.buf))
- rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len);
-
- return rec;
-}
-
-/* Free a record_reg record entry. */
-
-static inline void
-record_reg_release (struct record_entry *rec)
-{
- gdb_assert (rec->type == record_reg);
- if (rec->u.reg.len > sizeof (rec->u.reg.u.buf))
- xfree (rec->u.reg.u.ptr);
- xfree (rec);
-}
-
-/* Alloc a record_mem record entry. */
-
-static inline struct record_entry *
-record_mem_alloc (CORE_ADDR addr, int len)
-{
- struct record_entry *rec;
-
- rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry));
- rec->type = record_mem;
- rec->u.mem.addr = addr;
- rec->u.mem.len = len;
- if (rec->u.mem.len > sizeof (rec->u.mem.u.buf))
- rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len);
-
- return rec;
-}
-
-/* Free a record_mem record entry. */
-
-static inline void
-record_mem_release (struct record_entry *rec)
-{
- gdb_assert (rec->type == record_mem);
- if (rec->u.mem.len > sizeof (rec->u.mem.u.buf))
- xfree (rec->u.mem.u.ptr);
- xfree (rec);
-}
-
-/* Alloc a record_end record entry. */
-
-static inline struct record_entry *
-record_end_alloc (void)
-{
- struct record_entry *rec;
-
- rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry));
- rec->type = record_end;
-
- return rec;
-}
-
-/* Free a record_end record entry. */
-
-static inline void
-record_end_release (struct record_entry *rec)
-{
- xfree (rec);
-}
-
-/* Free one record entry, any type.
- Return entry->type, in case caller wants to know. */
-
-static inline enum record_type
-record_entry_release (struct record_entry *rec)
-{
- enum record_type type = rec->type;
-
- switch (type) {
- case record_reg:
- record_reg_release (rec);
- break;
- case record_mem:
- record_mem_release (rec);
- break;
- case record_end:
- record_end_release (rec);
- break;
- }
- return type;
-}
-
-/* Free all record entries in list pointed to by REC. */
-
-static void
-record_list_release (struct record_entry *rec)
-{
- if (!rec)
- return;
-
- while (rec->next)
- rec = rec->next;
+unsigned int record_debug = 0;
- while (rec->prev)
- {
- rec = rec->prev;
- record_entry_release (rec->next);
- }
+/* The number of instructions to print in "record instruction-history". */
+static unsigned int record_insn_history_size = 10;
- if (rec == &record_first)
- {
- record_insn_num = 0;
- record_first.next = NULL;
- }
- else
- record_entry_release (rec);
-}
+/* The variable registered as control variable in the "record
+ instruction-history" command. Necessary for extra input
+ validation. */
+static unsigned int record_insn_history_size_setshow_var;
-/* Free all record entries forward of the given list position. */
+/* The number of functions to print in "record function-call-history". */
+static unsigned int record_call_history_size = 10;
-static void
-record_list_release_following (struct record_entry *rec)
-{
- struct record_entry *tmp = rec->next;
+/* The variable registered as control variable in the "record
+ call-history" command. Necessary for extra input validation. */
+static unsigned int record_call_history_size_setshow_var;
- rec->next = NULL;
- while (tmp)
- {
- rec = tmp->next;
- if (record_entry_release (tmp) == record_end)
- {
- record_insn_num--;
- record_insn_count--;
- }
- tmp = rec;
- }
-}
+struct cmd_list_element *record_cmdlist = NULL;
+struct cmd_list_element *record_goto_cmdlist = NULL;
+struct cmd_list_element *set_record_cmdlist = NULL;
+struct cmd_list_element *show_record_cmdlist = NULL;
+struct cmd_list_element *info_record_cmdlist = NULL;
-/* Delete the first instruction from the beginning of the log, to make
- room for adding a new instruction at the end of the log.
+#define DEBUG(msg, args...) \
+ if (record_debug) \
+ fprintf_unfiltered (gdb_stdlog, "record: " msg "\n", ##args)
- Note -- this function does not modify record_insn_num. */
+/* See record.h. */
-static void
-record_list_release_first (void)
+struct target_ops *
+find_record_target (void)
{
- struct record_entry *tmp;
-
- if (!record_first.next)
- return;
-
- /* Loop until a record_end. */
- while (1)
- {
- /* Cut record_first.next out of the linked list. */
- tmp = record_first.next;
- record_first.next = tmp->next;
- tmp->next->prev = &record_first;
-
- /* tmp is now isolated, and can be deleted. */
- if (record_entry_release (tmp) == record_end)
- break; /* End loop at first record_end. */
-
- if (!record_first.next)
- {
- gdb_assert (record_insn_num == 1);
- break; /* End loop when list is empty. */
- }
- }
+ return find_target_at (record_stratum);
}
-/* Add a struct record_entry to record_arch_list. */
+/* Check that recording is active. Throw an error, if it isn't. */
-static void
-record_arch_list_add (struct record_entry *rec)
+static struct target_ops *
+require_record_target (void)
{
- if (record_debug > 1)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: record_arch_list_add %s.\n",
- host_address_to_string (rec));
-
- if (record_arch_list_tail)
- {
- record_arch_list_tail->next = rec;
- rec->prev = record_arch_list_tail;
- record_arch_list_tail = rec;
- }
- else
- {
- record_arch_list_head = rec;
- record_arch_list_tail = rec;
- }
-}
-
-/* Return the value storage location of a record entry. */
-static inline gdb_byte *
-record_get_loc (struct record_entry *rec)
-{
- switch (rec->type) {
- case record_mem:
- if (rec->u.mem.len > sizeof (rec->u.mem.u.buf))
- return rec->u.mem.u.ptr;
- else
- return rec->u.mem.u.buf;
- case record_reg:
- if (rec->u.reg.len > sizeof (rec->u.reg.u.buf))
- return rec->u.reg.u.ptr;
- else
- return rec->u.reg.u.buf;
- case record_end:
- default:
- gdb_assert (0);
- return NULL;
- }
-}
-
-/* Record the value of a register NUM to record_arch_list. */
-
-int
-record_arch_list_add_reg (struct regcache *regcache, int regnum)
-{
- struct record_entry *rec;
-
- if (record_debug > 1)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: add register num = %d to "
- "record list.\n",
- regnum);
-
- rec = record_reg_alloc (regcache, regnum);
-
- regcache_raw_read (regcache, regnum, record_get_loc (rec));
+ struct target_ops *t;
- record_arch_list_add (rec);
+ t = find_record_target ();
+ if (t == NULL)
+ error (_("No record target is currently active.\n"
+ "Use one of the \"target record-<tab><tab>\" commands first."));
- return 0;
+ return t;
}
-/* Record the value of a region of memory whose address is ADDR and
- length is LEN to record_arch_list. */
+/* See record.h. */
-int
-record_arch_list_add_mem (CORE_ADDR addr, int len)
+void
+record_preopen (void)
{
- struct record_entry *rec;
-
- if (record_debug > 1)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: add mem addr = %s len = %d to "
- "record list.\n",
- paddress (target_gdbarch, addr), len);
-
- if (!addr) /* FIXME: Why? Some arch must permit it... */
- return 0;
-
- rec = record_mem_alloc (addr, len);
-
- if (target_read_memory (addr, record_get_loc (rec), len))
- {
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: error reading memory at "
- "addr = %s len = %d.\n",
- paddress (target_gdbarch, addr), len);
- record_mem_release (rec);
- return -1;
- }
-
- record_arch_list_add (rec);
-
- return 0;
+ /* Check if a record target is already running. */
+ if (find_record_target () != NULL)
+ error (_("The process is already being recorded. Use \"record stop\" to "
+ "stop recording first."));
}
-/* Add a record_end type struct record_entry to record_arch_list. */
+/* See record.h. */
int
-record_arch_list_add_end (void)
+record_read_memory (struct gdbarch *gdbarch,
+ CORE_ADDR memaddr, gdb_byte *myaddr,
+ ssize_t len)
{
- struct record_entry *rec;
-
- if (record_debug > 1)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: add end to arch list.\n");
+ int ret = target_read_memory (memaddr, myaddr, len);
- rec = record_end_alloc ();
- rec->u.end.sigval = TARGET_SIGNAL_0;
- rec->u.end.insn_num = ++record_insn_count;
+ if (ret != 0)
+ DEBUG ("error reading memory at addr %s len = %ld.\n",
+ paddress (gdbarch, memaddr), (long) len);
- record_arch_list_add (rec);
-
- return 0;
-}
-
-static void
-record_check_insn_num (int set_terminal)
-{
- if (record_insn_max_num)
- {
- gdb_assert (record_insn_num <= record_insn_max_num);
- if (record_insn_num == record_insn_max_num)
- {
- /* Ask user what to do. */
- if (record_stop_at_limit)
- {
- int q;
-
- if (set_terminal)
- target_terminal_ours ();
- q = yquery (_("Do you want to auto delete previous execution "
- "log entries when record/replay buffer becomes "
- "full (record stop-at-limit)?"));
- if (set_terminal)
- target_terminal_inferior ();
- if (q)
- record_stop_at_limit = 0;
- else
- error (_("Process record: stopped by user."));
- }
- }
- }
-}
-
-static void
-record_arch_list_cleanups (void *ignore)
-{
- record_list_release (record_arch_list_tail);
-}
-
-/* Before inferior step (when GDB record the running message, inferior
- only can step), GDB will call this function to record the values to
- record_list. This function will call gdbarch_process_record to
- record the running message of inferior and set them to
- record_arch_list, and add it to record_list. */
-
-static int
-record_message (struct regcache *regcache, enum target_signal signal)
-{
- int ret;
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- struct cleanup *old_cleanups = make_cleanup (record_arch_list_cleanups, 0);
-
- record_arch_list_head = NULL;
- record_arch_list_tail = NULL;
-
- /* Check record_insn_num. */
- record_check_insn_num (1);
-
- /* If gdb sends a signal value to target_resume,
- save it in the 'end' field of the previous instruction.
-
- Maybe process record should record what really happened,
- rather than what gdb pretends has happened.
-
- So if Linux delivered the signal to the child process during
- the record mode, we will record it and deliver it again in
- the replay mode.
-
- If user says "ignore this signal" during the record mode, then
- it will be ignored again during the replay mode (no matter if
- the user says something different, like "deliver this signal"
- during the replay mode).
-
- User should understand that nothing he does during the replay
- mode will change the behavior of the child. If he tries,
- then that is a user error.
-
- But we should still deliver the signal to gdb during the replay,
- if we delivered it during the recording. Therefore we should
- record the signal during record_wait, not record_resume. */
- if (record_list != &record_first) /* FIXME better way to check */
- {
- gdb_assert (record_list->type == record_end);
- record_list->u.end.sigval = signal;
- }
-
- if (signal == TARGET_SIGNAL_0
- || !gdbarch_process_record_signal_p (gdbarch))
- ret = gdbarch_process_record (gdbarch,
- regcache,
- regcache_read_pc (regcache));
- else
- ret = gdbarch_process_record_signal (gdbarch,
- regcache,
- signal);
-
- if (ret > 0)
- error (_("Process record: inferior program stopped."));
- if (ret < 0)
- error (_("Process record: failed to record execution log."));
-
- discard_cleanups (old_cleanups);
-
- record_list->next = record_arch_list_head;
- record_arch_list_head->prev = record_list;
- record_list = record_arch_list_tail;
-
- if (record_insn_num == record_insn_max_num && record_insn_max_num)
- record_list_release_first ();
- else
- record_insn_num++;
-
- return 1;
-}
-
-struct record_message_args {
- struct regcache *regcache;
- enum target_signal signal;
-};
-
-static int
-record_message_wrapper (void *args)
-{
- struct record_message_args *record_args = args;
-
- return record_message (record_args->regcache, record_args->signal);
-}
-
-static int
-record_message_wrapper_safe (struct regcache *regcache,
- enum target_signal signal)
-{
- struct record_message_args args;
-
- args.regcache = regcache;
- args.signal = signal;
-
- return catch_errors (record_message_wrapper, &args, NULL, RETURN_MASK_ALL);
-}
-
-/* Set to 1 if record_store_registers and record_xfer_partial
- doesn't need record. */
-
-static int record_gdb_operation_disable = 0;
-
-struct cleanup *
-record_gdb_operation_disable_set (void)
-{
- struct cleanup *old_cleanups = NULL;
-
- old_cleanups =
- make_cleanup_restore_integer (&record_gdb_operation_disable);
- record_gdb_operation_disable = 1;
-
- return old_cleanups;
-}
-
-/* Flag set to TRUE for target_stopped_by_watchpoint. */
-static int record_hw_watchpoint = 0;
-
-/* Execute one instruction from the record log. Each instruction in
- the log will be represented by an arbitrary sequence of register
- entries and memory entries, followed by an 'end' entry. */
-
-static inline void
-record_exec_insn (struct regcache *regcache, struct gdbarch *gdbarch,
- struct record_entry *entry)
-{
- switch (entry->type)
- {
- case record_reg: /* reg */
- {
- gdb_byte reg[MAX_REGISTER_SIZE];
-
- if (record_debug > 1)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: record_reg %s to "
- "inferior num = %d.\n",
- host_address_to_string (entry),
- entry->u.reg.num);
-
- regcache_cooked_read (regcache, entry->u.reg.num, reg);
- regcache_cooked_write (regcache, entry->u.reg.num,
- record_get_loc (entry));
- memcpy (record_get_loc (entry), reg, entry->u.reg.len);
- }
- break;
-
- case record_mem: /* mem */
- {
- /* Nothing to do if the entry is flagged not_accessible. */
- if (!entry->u.mem.mem_entry_not_accessible)
- {
- gdb_byte *mem = alloca (entry->u.mem.len);
-
- if (record_debug > 1)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: record_mem %s to "
- "inferior addr = %s len = %d.\n",
- host_address_to_string (entry),
- paddress (gdbarch, entry->u.mem.addr),
- entry->u.mem.len);
-
- if (target_read_memory (entry->u.mem.addr, mem, entry->u.mem.len))
- {
- entry->u.mem.mem_entry_not_accessible = 1;
- if (record_debug)
- warning ("Process record: error reading memory at "
- "addr = %s len = %d.",
- paddress (gdbarch, entry->u.mem.addr),
- entry->u.mem.len);
- }
- else
- {
- if (target_write_memory (entry->u.mem.addr,
- record_get_loc (entry),
- entry->u.mem.len))
- {
- entry->u.mem.mem_entry_not_accessible = 1;
- if (record_debug)
- warning ("Process record: error writing memory at "
- "addr = %s len = %d.",
- paddress (gdbarch, entry->u.mem.addr),
- entry->u.mem.len);
- }
- else
- {
- memcpy (record_get_loc (entry), mem, entry->u.mem.len);
-
- /* We've changed memory --- check if a hardware
- watchpoint should trap. Note that this
- presently assumes the target beneath supports
- continuable watchpoints. On non-continuable
- watchpoints target, we'll want to check this
- _before_ actually doing the memory change, and
- not doing the change at all if the watchpoint
- traps. */
- if (hardware_watchpoint_inserted_in_range
- (get_regcache_aspace (regcache),
- entry->u.mem.addr, entry->u.mem.len))
- record_hw_watchpoint = 1;
- }
- }
- }
- }
- break;
- }
-}
-
-static struct target_ops *tmp_to_resume_ops;
-static void (*tmp_to_resume) (struct target_ops *, ptid_t, int,
- enum target_signal);
-static struct target_ops *tmp_to_wait_ops;
-static ptid_t (*tmp_to_wait) (struct target_ops *, ptid_t,
- struct target_waitstatus *,
- int);
-static struct target_ops *tmp_to_store_registers_ops;
-static void (*tmp_to_store_registers) (struct target_ops *,
- struct regcache *,
- int regno);
-static struct target_ops *tmp_to_xfer_partial_ops;
-static LONGEST (*tmp_to_xfer_partial) (struct target_ops *ops,
- enum target_object object,
- const char *annex,
- gdb_byte *readbuf,
- const gdb_byte *writebuf,
- ULONGEST offset,
- LONGEST len);
-static int (*tmp_to_insert_breakpoint) (struct gdbarch *,
- struct bp_target_info *);
-static int (*tmp_to_remove_breakpoint) (struct gdbarch *,
- struct bp_target_info *);
-static int (*tmp_to_stopped_by_watchpoint) (void);
-static int (*tmp_to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
-
-static void record_restore (void);
-
-/* Open the process record target. */
-
-static void
-record_core_open_1 (char *name, int from_tty)
-{
- struct regcache *regcache = get_current_regcache ();
- int regnum = gdbarch_num_regs (get_regcache_arch (regcache));
- int i;
-
- /* Get record_core_regbuf. */
- target_fetch_registers (regcache, -1);
- record_core_regbuf = xmalloc (MAX_REGISTER_SIZE * regnum);
- for (i = 0; i < regnum; i ++)
- regcache_raw_collect (regcache, i,
- record_core_regbuf + MAX_REGISTER_SIZE * i);
-
- /* Get record_core_start and record_core_end. */
- if (build_section_table (core_bfd, &record_core_start, &record_core_end))
- {
- xfree (record_core_regbuf);
- record_core_regbuf = NULL;
- error (_("\"%s\": Can't find sections: %s"),
- bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
- }
-
- push_target (&record_core_ops);
- record_restore ();
-}
-
-/* "to_open" target method for 'live' processes. */
-
-static void
-record_open_1 (char *name, int from_tty)
-{
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n");
-
- /* check exec */
- if (!target_has_execution)
- error (_("Process record: the program is not being run."));
- if (non_stop)
- error (_("Process record target can't debug inferior in non-stop mode "
- "(non-stop)."));
- if (target_async_permitted)
- error (_("Process record target can't debug inferior in asynchronous "
- "mode (target-async)."));
-
- if (!gdbarch_process_record_p (target_gdbarch))
- error (_("Process record: the current architecture doesn't support "
- "record function."));
-
- if (!tmp_to_resume)
- error (_("Could not find 'to_resume' method on the target stack."));
- if (!tmp_to_wait)
- error (_("Could not find 'to_wait' method on the target stack."));
- if (!tmp_to_store_registers)
- error (_("Could not find 'to_store_registers' method on the target stack."));
- if (!tmp_to_insert_breakpoint)
- error (_("Could not find 'to_insert_breakpoint' method on the target stack."));
- if (!tmp_to_remove_breakpoint)
- error (_("Could not find 'to_remove_breakpoint' method on the target stack."));
- if (!tmp_to_stopped_by_watchpoint)
- error (_("Could not find 'to_stopped_by_watchpoint' method on the target stack."));
- if (!tmp_to_stopped_data_address)
- error (_("Could not find 'to_stopped_data_address' method on the target stack."));
-
- push_target (&record_ops);
-}
-
-/* "to_open" target method. Open the process record target. */
-
-static void
-record_open (char *name, int from_tty)
-{
- struct target_ops *t;
-
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n");
-
- /* Check if record target is already running. */
- if (current_target.to_stratum == record_stratum)
- error (_("Process record target already running. Use \"record stop\" to "
- "stop record target first."));
-
- /* Reset the tmp beneath pointers. */
- tmp_to_resume_ops = NULL;
- tmp_to_resume = NULL;
- tmp_to_wait_ops = NULL;
- tmp_to_wait = NULL;
- tmp_to_store_registers_ops = NULL;
- tmp_to_store_registers = NULL;
- tmp_to_xfer_partial_ops = NULL;
- tmp_to_xfer_partial = NULL;
- tmp_to_insert_breakpoint = NULL;
- tmp_to_remove_breakpoint = NULL;
- tmp_to_stopped_by_watchpoint = NULL;
- tmp_to_stopped_data_address = NULL;
-
- /* Set the beneath function pointers. */
- for (t = current_target.beneath; t != NULL; t = t->beneath)
- {
- if (!tmp_to_resume)
- {
- tmp_to_resume = t->to_resume;
- tmp_to_resume_ops = t;
- }
- if (!tmp_to_wait)
- {
- tmp_to_wait = t->to_wait;
- tmp_to_wait_ops = t;
- }
- if (!tmp_to_store_registers)
- {
- tmp_to_store_registers = t->to_store_registers;
- tmp_to_store_registers_ops = t;
- }
- if (!tmp_to_xfer_partial)
- {
- tmp_to_xfer_partial = t->to_xfer_partial;
- tmp_to_xfer_partial_ops = t;
- }
- if (!tmp_to_insert_breakpoint)
- tmp_to_insert_breakpoint = t->to_insert_breakpoint;
- if (!tmp_to_remove_breakpoint)
- tmp_to_remove_breakpoint = t->to_remove_breakpoint;
- if (!tmp_to_stopped_by_watchpoint)
- tmp_to_stopped_by_watchpoint = t->to_stopped_by_watchpoint;
- if (!tmp_to_stopped_data_address)
- tmp_to_stopped_data_address = t->to_stopped_data_address;
- }
- if (!tmp_to_xfer_partial)
- error (_("Could not find 'to_xfer_partial' method on the target stack."));
-
- /* Reset */
- record_insn_num = 0;
- record_insn_count = 0;
- record_list = &record_first;
- record_list->next = NULL;
-
- /* Set the tmp beneath pointers to beneath pointers. */
- record_beneath_to_resume_ops = tmp_to_resume_ops;
- record_beneath_to_resume = tmp_to_resume;
- record_beneath_to_wait_ops = tmp_to_wait_ops;
- record_beneath_to_wait = tmp_to_wait;
- record_beneath_to_store_registers_ops = tmp_to_store_registers_ops;
- record_beneath_to_store_registers = tmp_to_store_registers;
- record_beneath_to_xfer_partial_ops = tmp_to_xfer_partial_ops;
- record_beneath_to_xfer_partial = tmp_to_xfer_partial;
- record_beneath_to_insert_breakpoint = tmp_to_insert_breakpoint;
- record_beneath_to_remove_breakpoint = tmp_to_remove_breakpoint;
- record_beneath_to_stopped_by_watchpoint = tmp_to_stopped_by_watchpoint;
- record_beneath_to_stopped_data_address = tmp_to_stopped_data_address;
-
- if (current_target.to_stratum == core_stratum)
- record_core_open_1 (name, from_tty);
- else
- record_open_1 (name, from_tty);
-}
-
-/* "to_close" target method. Close the process record target. */
-
-static void
-record_close (int quitting)
-{
- struct record_core_buf_entry *entry;
-
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n");
-
- record_list_release (record_list);
-
- /* Release record_core_regbuf. */
- if (record_core_regbuf)
- {
- xfree (record_core_regbuf);
- record_core_regbuf = NULL;
- }
-
- /* Release record_core_buf_list. */
- if (record_core_buf_list)
- {
- for (entry = record_core_buf_list->prev; entry; entry = entry->prev)
- {
- xfree (record_core_buf_list);
- record_core_buf_list = entry;
- }
- record_core_buf_list = NULL;
- }
+ return ret;
}
-static int record_resume_step = 0;
-
-/* "to_resume" target method. Resume the process record target. */
+/* Stop recording. */
static void
-record_resume (struct target_ops *ops, ptid_t ptid, int step,
- enum target_signal signal)
+record_stop (struct target_ops *t)
{
- record_resume_step = step;
+ DEBUG ("stop %s", t->to_shortname);
- if (!RECORD_IS_REPLAY)
- {
- record_message (get_current_regcache (), signal);
- record_beneath_to_resume (record_beneath_to_resume_ops, ptid, 1,
- signal);
- }
+ t->to_stop_recording (t);
}
-static int record_get_sig = 0;
-
-/* SIGINT signal handler, registered by "to_wait" method. */
+/* Unpush the record target. */
static void
-record_sig_handler (int signo)
+record_unpush (struct target_ops *t)
{
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n");
-
- /* It will break the running inferior in replay mode. */
- record_resume_step = 1;
+ DEBUG ("unpush %s", t->to_shortname);
- /* It will let record_wait set inferior status to get the signal
- SIGINT. */
- record_get_sig = 1;
-}
-
-static void
-record_wait_cleanups (void *ignore)
-{
- if (execution_direction == EXEC_REVERSE)
- {
- if (record_list->next)
- record_list = record_list->next;
- }
- else
- record_list = record_list->prev;
+ unpush_target (t);
}
-/* "to_wait" target method for process record target.
+/* See record.h. */
- In record mode, the target is always run in singlestep mode
- (even when gdb says to continue). The to_wait method intercepts
- the stop events and determines which ones are to be passed on to
- gdb. Most stop events are just singlestep events that gdb is not
- to know about, so the to_wait method just records them and keeps
- singlestepping.
-
- In replay mode, this function emulates the recorded execution log,
- one instruction at a time (forward or backward), and determines
- where to stop. */
-
-static ptid_t
-record_wait (struct target_ops *ops,
- ptid_t ptid, struct target_waitstatus *status,
- int options)
-{
- struct cleanup *set_cleanups = record_gdb_operation_disable_set ();
-
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: record_wait "
- "record_resume_step = %d\n",
- record_resume_step);
-
- record_get_sig = 0;
- signal (SIGINT, record_sig_handler);
-
- if (!RECORD_IS_REPLAY && ops != &record_core_ops)
- {
- if (record_resume_step)
- {
- /* This is a single step. */
- return record_beneath_to_wait (record_beneath_to_wait_ops,
- ptid, status, options);
- }
- else
- {
- /* This is not a single step. */
- ptid_t ret;
- CORE_ADDR tmp_pc;
-
- while (1)
- {
- ret = record_beneath_to_wait (record_beneath_to_wait_ops,
- ptid, status, options);
-
- if (record_resume_step)
- return ret;
-
- /* Is this a SIGTRAP? */
- if (status->kind == TARGET_WAITKIND_STOPPED
- && status->value.sig == TARGET_SIGNAL_TRAP)
- {
- struct regcache *regcache;
- struct address_space *aspace;
-
- /* Yes -- this is likely our single-step finishing,
- but check if there's any reason the core would be
- interested in the event. */
-
- registers_changed ();
- regcache = get_current_regcache ();
- tmp_pc = regcache_read_pc (regcache);
- aspace = get_regcache_aspace (regcache);
-
- if (target_stopped_by_watchpoint ())
- {
- /* Always interested in watchpoints. */
- }
- else if (breakpoint_inserted_here_p (aspace, tmp_pc))
- {
- /* There is a breakpoint here. Let the core
- handle it. */
- if (software_breakpoint_inserted_here_p (aspace, tmp_pc))
- {
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- CORE_ADDR decr_pc_after_break
- = gdbarch_decr_pc_after_break (gdbarch);
- if (decr_pc_after_break)
- regcache_write_pc (regcache,
- tmp_pc + decr_pc_after_break);
- }
- }
- else
- {
- /* This must be a single-step trap. Record the
- insn and issue another step. */
- if (!record_message_wrapper_safe (regcache,
- TARGET_SIGNAL_0))
- {
- status->kind = TARGET_WAITKIND_STOPPED;
- status->value.sig = TARGET_SIGNAL_0;
- break;
- }
-
- record_beneath_to_resume (record_beneath_to_resume_ops,
- ptid, 1,
- TARGET_SIGNAL_0);
- continue;
- }
- }
-
- /* The inferior is broken by a breakpoint or a signal. */
- break;
- }
-
- return ret;
- }
- }
- else
- {
- struct regcache *regcache = get_current_regcache ();
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- struct address_space *aspace = get_regcache_aspace (regcache);
- int continue_flag = 1;
- int first_record_end = 1;
- struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0);
- CORE_ADDR tmp_pc;
-
- record_hw_watchpoint = 0;
- status->kind = TARGET_WAITKIND_STOPPED;
-
- /* Check breakpoint when forward execute. */
- if (execution_direction == EXEC_FORWARD)
- {
- tmp_pc = regcache_read_pc (regcache);
- if (breakpoint_inserted_here_p (aspace, tmp_pc))
- {
- int decr_pc_after_break = gdbarch_decr_pc_after_break (gdbarch);
-
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: break at %s.\n",
- paddress (gdbarch, tmp_pc));
-
- if (decr_pc_after_break
- && !record_resume_step
- && software_breakpoint_inserted_here_p (aspace, tmp_pc))
- regcache_write_pc (regcache,
- tmp_pc + decr_pc_after_break);
- goto replay_out;
- }
- }
-
- /* If GDB is in terminal_inferior mode, it will not get the signal.
- And in GDB replay mode, GDB doesn't need to be in terminal_inferior
- mode, because inferior will not executed.
- Then set it to terminal_ours to make GDB get the signal. */
- target_terminal_ours ();
-
- /* In EXEC_FORWARD mode, record_list points to the tail of prev
- instruction. */
- if (execution_direction == EXEC_FORWARD && record_list->next)
- record_list = record_list->next;
-
- /* Loop over the record_list, looking for the next place to
- stop. */
- do
- {
- /* Check for beginning and end of log. */
- if (execution_direction == EXEC_REVERSE
- && record_list == &record_first)
- {
- /* Hit beginning of record log in reverse. */
- status->kind = TARGET_WAITKIND_NO_HISTORY;
- break;
- }
- if (execution_direction != EXEC_REVERSE && !record_list->next)
- {
- /* Hit end of record log going forward. */
- status->kind = TARGET_WAITKIND_NO_HISTORY;
- break;
- }
-
- record_exec_insn (regcache, gdbarch, record_list);
-
- if (record_list->type == record_end)
- {
- if (record_debug > 1)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: record_end %s to "
- "inferior.\n",
- host_address_to_string (record_list));
-
- if (first_record_end && execution_direction == EXEC_REVERSE)
- {
- /* When reverse excute, the first record_end is the part of
- current instruction. */
- first_record_end = 0;
- }
- else
- {
- /* In EXEC_REVERSE mode, this is the record_end of prev
- instruction.
- In EXEC_FORWARD mode, this is the record_end of current
- instruction. */
- /* step */
- if (record_resume_step)
- {
- if (record_debug > 1)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: step.\n");
- continue_flag = 0;
- }
-
- /* check breakpoint */
- tmp_pc = regcache_read_pc (regcache);
- if (breakpoint_inserted_here_p (aspace, tmp_pc))
- {
- int decr_pc_after_break
- = gdbarch_decr_pc_after_break (gdbarch);
-
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: break "
- "at %s.\n",
- paddress (gdbarch, tmp_pc));
- if (decr_pc_after_break
- && execution_direction == EXEC_FORWARD
- && !record_resume_step
- && software_breakpoint_inserted_here_p (aspace,
- tmp_pc))
- regcache_write_pc (regcache,
- tmp_pc + decr_pc_after_break);
- continue_flag = 0;
- }
-
- if (record_hw_watchpoint)
- {
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
-Process record: hit hw watchpoint.\n");
- continue_flag = 0;
- }
- /* Check target signal */
- if (record_list->u.end.sigval != TARGET_SIGNAL_0)
- /* FIXME: better way to check */
- continue_flag = 0;
- }
- }
-
- if (continue_flag)
- {
- if (execution_direction == EXEC_REVERSE)
- {
- if (record_list->prev)
- record_list = record_list->prev;
- }
- else
- {
- if (record_list->next)
- record_list = record_list->next;
- }
- }
- }
- while (continue_flag);
-
-replay_out:
- if (record_get_sig)
- status->value.sig = TARGET_SIGNAL_INT;
- else if (record_list->u.end.sigval != TARGET_SIGNAL_0)
- /* FIXME: better way to check */
- status->value.sig = record_list->u.end.sigval;
- else
- status->value.sig = TARGET_SIGNAL_TRAP;
-
- discard_cleanups (old_cleanups);
- }
-
- signal (SIGINT, handle_sigint);
-
- do_cleanups (set_cleanups);
- return inferior_ptid;
-}
-
-static int
-record_stopped_by_watchpoint (void)
+void
+record_disconnect (struct target_ops *t, const char *args, int from_tty)
{
- if (RECORD_IS_REPLAY)
- return record_hw_watchpoint;
- else
- return record_beneath_to_stopped_by_watchpoint ();
-}
+ gdb_assert (t->to_stratum == record_stratum);
-static int
-record_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p)
-{
- if (RECORD_IS_REPLAY)
- return 0;
- else
- return record_beneath_to_stopped_data_address (ops, addr_p);
-}
+ DEBUG ("disconnect %s", t->to_shortname);
-/* "to_disconnect" method for process record target. */
+ record_stop (t);
+ record_unpush (t);
-static void
-record_disconnect (struct target_ops *target, char *args, int from_tty)
-{
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n");
-
- unpush_target (&record_ops);
target_disconnect (args, from_tty);
}
-/* "to_detach" method for process record target. */
-
-static void
-record_detach (struct target_ops *ops, char *args, int from_tty)
-{
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n");
-
- unpush_target (&record_ops);
- target_detach (args, from_tty);
-}
-
-/* "to_mourn_inferior" method for process record target. */
-
-static void
-record_mourn_inferior (struct target_ops *ops)
-{
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: "
- "record_mourn_inferior\n");
-
- unpush_target (&record_ops);
- target_mourn_inferior ();
-}
-
-/* Close process record target before killing the inferior process. */
-
-static void
-record_kill (struct target_ops *ops)
-{
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n");
-
- unpush_target (&record_ops);
- target_kill ();
-}
-
-/* Record registers change (by user or by GDB) to list as an instruction. */
-
-static void
-record_registers_change (struct regcache *regcache, int regnum)
-{
- /* Check record_insn_num. */
- record_check_insn_num (0);
-
- record_arch_list_head = NULL;
- record_arch_list_tail = NULL;
-
- if (regnum < 0)
- {
- int i;
-
- for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
- {
- if (record_arch_list_add_reg (regcache, i))
- {
- record_list_release (record_arch_list_tail);
- error (_("Process record: failed to record execution log."));
- }
- }
- }
- else
- {
- if (record_arch_list_add_reg (regcache, regnum))
- {
- record_list_release (record_arch_list_tail);
- error (_("Process record: failed to record execution log."));
- }
- }
- if (record_arch_list_add_end ())
- {
- record_list_release (record_arch_list_tail);
- error (_("Process record: failed to record execution log."));
- }
- record_list->next = record_arch_list_head;
- record_arch_list_head->prev = record_list;
- record_list = record_arch_list_tail;
-
- if (record_insn_num == record_insn_max_num && record_insn_max_num)
- record_list_release_first ();
- else
- record_insn_num++;
-}
-
-/* "to_store_registers" method for process record target. */
-
-static void
-record_store_registers (struct target_ops *ops, struct regcache *regcache,
- int regno)
-{
- if (!record_gdb_operation_disable)
- {
- if (RECORD_IS_REPLAY)
- {
- int n;
-
- /* Let user choose if he wants to write register or not. */
- if (regno < 0)
- n =
- query (_("Because GDB is in replay mode, changing the "
- "value of a register will make the execution "
- "log unusable from this point onward. "
- "Change all registers?"));
- else
- n =
- query (_("Because GDB is in replay mode, changing the value "
- "of a register will make the execution log unusable "
- "from this point onward. Change register %s?"),
- gdbarch_register_name (get_regcache_arch (regcache),
- regno));
-
- if (!n)
- {
- /* Invalidate the value of regcache that was set in function
- "regcache_raw_write". */
- if (regno < 0)
- {
- int i;
-
- for (i = 0;
- i < gdbarch_num_regs (get_regcache_arch (regcache));
- i++)
- regcache_invalidate (regcache, i);
- }
- else
- regcache_invalidate (regcache, regno);
-
- error (_("Process record canceled the operation."));
- }
-
- /* Destroy the record from here forward. */
- record_list_release_following (record_list);
- }
-
- record_registers_change (regcache, regno);
- }
- record_beneath_to_store_registers (record_beneath_to_store_registers_ops,
- regcache, regno);
-}
-
-/* "to_xfer_partial" method. Behavior is conditional on RECORD_IS_REPLAY.
- In replay mode, we cannot write memory unles we are willing to
- invalidate the record/replay log from this point forward. */
-
-static LONGEST
-record_xfer_partial (struct target_ops *ops, enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
-{
- if (!record_gdb_operation_disable
- && (object == TARGET_OBJECT_MEMORY
- || object == TARGET_OBJECT_RAW_MEMORY) && writebuf)
- {
- if (RECORD_IS_REPLAY)
- {
- /* Let user choose if he wants to write memory or not. */
- if (!query (_("Because GDB is in replay mode, writing to memory "
- "will make the execution log unusable from this "
- "point onward. Write memory at address %s?"),
- paddress (target_gdbarch, offset)))
- error (_("Process record canceled the operation."));
-
- /* Destroy the record from here forward. */
- record_list_release_following (record_list);
- }
-
- /* Check record_insn_num */
- record_check_insn_num (0);
-
- /* Record registers change to list as an instruction. */
- record_arch_list_head = NULL;
- record_arch_list_tail = NULL;
- if (record_arch_list_add_mem (offset, len))
- {
- record_list_release (record_arch_list_tail);
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: failed to record "
- "execution log.");
- return -1;
- }
- if (record_arch_list_add_end ())
- {
- record_list_release (record_arch_list_tail);
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Process record: failed to record "
- "execution log.");
- return -1;
- }
- record_list->next = record_arch_list_head;
- record_arch_list_head->prev = record_list;
- record_list = record_arch_list_tail;
-
- if (record_insn_num == record_insn_max_num && record_insn_max_num)
- record_list_release_first ();
- else
- record_insn_num++;
- }
-
- return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops,
- object, annex, readbuf, writebuf,
- offset, len);
-}
-
-/* Behavior is conditional on RECORD_IS_REPLAY.
- We will not actually insert or remove breakpoints when replaying,
- nor when recording. */
-
-static int
-record_insert_breakpoint (struct gdbarch *gdbarch,
- struct bp_target_info *bp_tgt)
-{
- if (!RECORD_IS_REPLAY)
- {
- struct cleanup *old_cleanups = record_gdb_operation_disable_set ();
- int ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt);
-
- do_cleanups (old_cleanups);
-
- return ret;
- }
+/* See record.h. */
- return 0;
-}
-
-/* "to_remove_breakpoint" method for process record target. */
-
-static int
-record_remove_breakpoint (struct gdbarch *gdbarch,
- struct bp_target_info *bp_tgt)
-{
- if (!RECORD_IS_REPLAY)
- {
- struct cleanup *old_cleanups = record_gdb_operation_disable_set ();
- int ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt);
-
- do_cleanups (old_cleanups);
-
- return ret;
- }
-
- return 0;
-}
-
-/* "to_can_execute_reverse" method for process record target. */
-
-static int
-record_can_execute_reverse (void)
-{
- return 1;
-}
-
-/* "to_get_bookmark" method for process record and prec over core. */
-
-static gdb_byte *
-record_get_bookmark (char *args, int from_tty)
-{
- gdb_byte *ret = NULL;
-
- /* Return stringified form of instruction count. */
- if (record_list && record_list->type == record_end)
- ret = xstrdup (pulongest (record_list->u.end.insn_num));
-
- if (record_debug)
- {
- if (ret)
- fprintf_unfiltered (gdb_stdlog,
- "record_get_bookmark returns %s\n", ret);
- else
- fprintf_unfiltered (gdb_stdlog,
- "record_get_bookmark returns NULL\n");
- }
- return ret;
-}
-
-/* The implementation of the command "record goto". */
-static void cmd_record_goto (char *, int);
-
-/* "to_goto_bookmark" method for process record and prec over core. */
-
-static void
-record_goto_bookmark (gdb_byte *bookmark, int from_tty)
-{
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog,
- "record_goto_bookmark receives %s\n", bookmark);
-
- if (bookmark[0] == '\'' || bookmark[0] == '\"')
- {
- if (bookmark[strlen (bookmark) - 1] != bookmark[0])
- error (_("Unbalanced quotes: %s"), bookmark);
-
- /* Strip trailing quote. */
- bookmark[strlen (bookmark) - 1] = '\0';
- /* Strip leading quote. */
- bookmark++;
- /* Pass along to cmd_record_goto. */
- }
-
- cmd_record_goto ((char *) bookmark, from_tty);
- return;
-}
-
-static void
-init_record_ops (void)
-{
- record_ops.to_shortname = "record";
- record_ops.to_longname = "Process record and replay target";
- record_ops.to_doc =
- "Log program while executing and replay execution from log.";
- record_ops.to_open = record_open;
- record_ops.to_close = record_close;
- record_ops.to_resume = record_resume;
- record_ops.to_wait = record_wait;
- record_ops.to_disconnect = record_disconnect;
- record_ops.to_detach = record_detach;
- record_ops.to_mourn_inferior = record_mourn_inferior;
- record_ops.to_kill = record_kill;
- record_ops.to_create_inferior = find_default_create_inferior;
- record_ops.to_store_registers = record_store_registers;
- record_ops.to_xfer_partial = record_xfer_partial;
- record_ops.to_insert_breakpoint = record_insert_breakpoint;
- record_ops.to_remove_breakpoint = record_remove_breakpoint;
- record_ops.to_stopped_by_watchpoint = record_stopped_by_watchpoint;
- record_ops.to_stopped_data_address = record_stopped_data_address;
- record_ops.to_can_execute_reverse = record_can_execute_reverse;
- record_ops.to_stratum = record_stratum;
- /* Add bookmark target methods. */
- record_ops.to_get_bookmark = record_get_bookmark;
- record_ops.to_goto_bookmark = record_goto_bookmark;
- record_ops.to_magic = OPS_MAGIC;
-}
-
-/* "to_resume" method for prec over corefile. */
-
-static void
-record_core_resume (struct target_ops *ops, ptid_t ptid, int step,
- enum target_signal signal)
-{
- record_resume_step = step;
-}
-
-/* "to_kill" method for prec over corefile. */
-
-static void
-record_core_kill (struct target_ops *ops)
-{
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Process record: record_core_kill\n");
-
- unpush_target (&record_core_ops);
-}
-
-/* "to_fetch_registers" method for prec over corefile. */
-
-static void
-record_core_fetch_registers (struct target_ops *ops,
- struct regcache *regcache,
- int regno)
+void
+record_detach (struct target_ops *t, const char *args, int from_tty)
{
- if (regno < 0)
- {
- int num = gdbarch_num_regs (get_regcache_arch (regcache));
- int i;
-
- for (i = 0; i < num; i ++)
- regcache_raw_supply (regcache, i,
- record_core_regbuf + MAX_REGISTER_SIZE * i);
- }
- else
- regcache_raw_supply (regcache, regno,
- record_core_regbuf + MAX_REGISTER_SIZE * regno);
-}
-
-/* "to_prepare_to_store" method for prec over corefile. */
+ gdb_assert (t->to_stratum == record_stratum);
-static void
-record_core_prepare_to_store (struct regcache *regcache)
-{
-}
+ DEBUG ("detach %s", t->to_shortname);
-/* "to_store_registers" method for prec over corefile. */
+ record_stop (t);
+ record_unpush (t);
-static void
-record_core_store_registers (struct target_ops *ops,
- struct regcache *regcache,
- int regno)
-{
- if (record_gdb_operation_disable)
- regcache_raw_collect (regcache, regno,
- record_core_regbuf + MAX_REGISTER_SIZE * regno);
- else
- error (_("You can't do that without a process to debug."));
+ target_detach (args, from_tty);
}
-/* "to_xfer_partial" method for prec over corefile. */
+/* See record.h. */
-static LONGEST
-record_core_xfer_partial (struct target_ops *ops, enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf, ULONGEST offset,
- LONGEST len)
+void
+record_mourn_inferior (struct target_ops *t)
{
- if (object == TARGET_OBJECT_MEMORY)
- {
- if (record_gdb_operation_disable || !writebuf)
- {
- struct target_section *p;
+ gdb_assert (t->to_stratum == record_stratum);
- for (p = record_core_start; p < record_core_end; p++)
- {
- if (offset >= p->addr)
- {
- struct record_core_buf_entry *entry;
- ULONGEST sec_offset;
-
- if (offset >= p->endaddr)
- continue;
-
- if (offset + len > p->endaddr)
- len = p->endaddr - offset;
-
- sec_offset = offset - p->addr;
-
- /* Read readbuf or write writebuf p, offset, len. */
- /* Check flags. */
- if (p->the_bfd_section->flags & SEC_CONSTRUCTOR
- || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0)
- {
- if (readbuf)
- memset (readbuf, 0, len);
- return len;
- }
- /* Get record_core_buf_entry. */
- for (entry = record_core_buf_list; entry;
- entry = entry->prev)
- if (entry->p == p)
- break;
- if (writebuf)
- {
- if (!entry)
- {
- /* Add a new entry. */
- entry = (struct record_core_buf_entry *)
- xmalloc (sizeof (struct record_core_buf_entry));
- entry->p = p;
- if (!bfd_malloc_and_get_section (p->bfd,
- p->the_bfd_section,
- &entry->buf))
- {
- xfree (entry);
- return 0;
- }
- entry->prev = record_core_buf_list;
- record_core_buf_list = entry;
- }
-
- memcpy (entry->buf + sec_offset, writebuf,
- (size_t) len);
- }
- else
- {
- if (!entry)
- return record_beneath_to_xfer_partial
- (record_beneath_to_xfer_partial_ops,
- object, annex, readbuf, writebuf,
- offset, len);
-
- memcpy (readbuf, entry->buf + sec_offset,
- (size_t) len);
- }
-
- return len;
- }
- }
+ DEBUG ("mourn inferior %s", t->to_shortname);
- return -1;
- }
- else
- error (_("You can't do that without a process to debug."));
- }
+ /* It is safer to not stop recording. Resources will be freed when
+ threads are discarded. */
+ record_unpush (t);
- return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops,
- object, annex, readbuf, writebuf,
- offset, len);
+ target_mourn_inferior ();
}
-/* "to_insert_breakpoint" method for prec over corefile. */
+/* See record.h. */
-static int
-record_core_insert_breakpoint (struct gdbarch *gdbarch,
- struct bp_target_info *bp_tgt)
-{
- return 0;
-}
+void
+record_kill (struct target_ops *t)
+{
+ gdb_assert (t->to_stratum == record_stratum);
-/* "to_remove_breakpoint" method for prec over corefile. */
+ DEBUG ("kill %s", t->to_shortname);
-static int
-record_core_remove_breakpoint (struct gdbarch *gdbarch,
- struct bp_target_info *bp_tgt)
-{
- return 0;
+ /* It is safer to not stop recording. Resources will be freed when
+ threads are discarded. */
+ record_unpush (t);
+
+ target_kill ();
}
-/* "to_has_execution" method for prec over corefile. */
+/* See record.h. */
int
-record_core_has_execution (struct target_ops *ops)
+record_check_stopped_by_breakpoint (struct address_space *aspace, CORE_ADDR pc,
+ enum target_stop_reason *reason)
{
- return 1;
-}
+ if (breakpoint_inserted_here_p (aspace, pc))
+ {
+ if (hardware_breakpoint_inserted_here_p (aspace, pc))
+ *reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
+ else
+ *reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
+ return 1;
+ }
-static void
-init_record_core_ops (void)
-{
- record_core_ops.to_shortname = "record-core";
- record_core_ops.to_longname = "Process record and replay target";
- record_core_ops.to_doc =
- "Log program while executing and replay execution from log.";
- record_core_ops.to_open = record_open;
- record_core_ops.to_close = record_close;
- record_core_ops.to_resume = record_core_resume;
- record_core_ops.to_wait = record_wait;
- record_core_ops.to_kill = record_core_kill;
- record_core_ops.to_fetch_registers = record_core_fetch_registers;
- record_core_ops.to_prepare_to_store = record_core_prepare_to_store;
- record_core_ops.to_store_registers = record_core_store_registers;
- record_core_ops.to_xfer_partial = record_core_xfer_partial;
- record_core_ops.to_insert_breakpoint = record_core_insert_breakpoint;
- record_core_ops.to_remove_breakpoint = record_core_remove_breakpoint;
- record_core_ops.to_stopped_by_watchpoint = record_stopped_by_watchpoint;
- record_core_ops.to_stopped_data_address = record_stopped_data_address;
- record_core_ops.to_can_execute_reverse = record_can_execute_reverse;
- record_core_ops.to_has_execution = record_core_has_execution;
- record_core_ops.to_stratum = record_stratum;
- /* Add bookmark target methods. */
- record_core_ops.to_get_bookmark = record_get_bookmark;
- record_core_ops.to_goto_bookmark = record_goto_bookmark;
- record_core_ops.to_magic = OPS_MAGIC;
+ *reason = TARGET_STOPPED_BY_NO_REASON;
+ return 0;
}
/* Implement "show record debug" command. */
static void
cmd_record_start (char *args, int from_tty)
{
- execute_command ("target record", from_tty);
+ execute_command ("target record-full", from_tty);
}
/* Truncate the record log from the present point
static void
cmd_record_delete (char *args, int from_tty)
{
- if (current_target.to_stratum == record_stratum)
+ require_record_target ();
+
+ if (!target_record_is_replaying (inferior_ptid))
{
- if (RECORD_IS_REPLAY)
- {
- if (!from_tty || query (_("Delete the log from this point forward "
- "and begin to record the running message "
- "at current PC?")))
- record_list_release_following (record_list);
- }
- else
- printf_unfiltered (_("Already at end of record list.\n"));
+ printf_unfiltered (_("Already at end of record list.\n"));
+ return;
+ }
+ if (!target_supports_delete_record ())
+ {
+ printf_unfiltered (_("The current record target does not support "
+ "this operation.\n"));
+ return;
}
- else
- printf_unfiltered (_("Process record is not started.\n"));
+
+ if (!from_tty || query (_("Delete the log from this point forward "
+ "and begin to record the running message "
+ "at current PC?")))
+ target_delete_record ();
}
/* Implement the "stoprecord" or "record stop" command. */
static void
cmd_record_stop (char *args, int from_tty)
{
- if (current_target.to_stratum == record_stratum)
- {
- unpush_target (&record_ops);
- printf_unfiltered (_("Process record is stopped and all execution "
- "logs are deleted.\n"));
- }
- else
- printf_unfiltered (_("Process record is not started.\n"));
-}
+ struct target_ops *t;
-/* Set upper limit of record log size. */
+ t = require_record_target ();
-static void
-set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c)
-{
- if (record_insn_num > record_insn_max_num && record_insn_max_num)
- {
- /* Count down record_insn_num while releasing records from list. */
- while (record_insn_num > record_insn_max_num)
- {
- record_list_release_first ();
- record_insn_num--;
- }
- }
+ record_stop (t);
+ record_unpush (t);
+
+ printf_unfiltered (_("Process record is stopped and all execution "
+ "logs are deleted.\n"));
+
+ observer_notify_record_changed (current_inferior (), 0);
}
-static struct cmd_list_element *record_cmdlist, *set_record_cmdlist,
- *show_record_cmdlist, *info_record_cmdlist;
+/* The "set record" command. */
static void
set_record_command (char *args, int from_tty)
{
- printf_unfiltered (_("\
-\"set record\" must be followed by an apporpriate subcommand.\n"));
+ printf_unfiltered (_("\"set record\" must be followed "
+ "by an apporpriate subcommand.\n"));
help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout);
}
+/* The "show record" command. */
+
static void
show_record_command (char *args, int from_tty)
{
cmd_show_list (show_record_cmdlist, from_tty, "");
}
-/* Display some statistics about the execution log. */
+/* The "info record" command. */
static void
info_record_command (char *args, int from_tty)
{
- struct record_entry *p;
+ struct target_ops *t;
- if (current_target.to_stratum == record_stratum)
+ t = find_record_target ();
+ if (t == NULL)
{
- if (RECORD_IS_REPLAY)
- printf_filtered (_("Replay mode:\n"));
- else
- printf_filtered (_("Record mode:\n"));
+ printf_filtered (_("No record target is currently active.\n"));
+ return;
+ }
- /* Find entry for first actual instruction in the log. */
- for (p = record_first.next;
- p != NULL && p->type != record_end;
- p = p->next)
- ;
+ printf_filtered (_("Active record target: %s\n"), t->to_shortname);
+ t->to_info_record (t);
+}
- /* Do we have a log at all? */
- if (p != NULL && p->type == record_end)
- {
- /* Display instruction number for first instruction in the log. */
- printf_filtered (_("Lowest recorded instruction number is %s.\n"),
- pulongest (p->u.end.insn_num));
-
- /* If in replay mode, display where we are in the log. */
- if (RECORD_IS_REPLAY)
- printf_filtered (_("Current instruction number is %s.\n"),
- pulongest (record_list->u.end.insn_num));
-
- /* Display instruction number for last instruction in the log. */
- printf_filtered (_("Highest recorded instruction number is %s.\n"),
- pulongest (record_insn_count));
-
- /* Display log count. */
- printf_filtered (_("Log contains %d instructions.\n"),
- record_insn_num);
- }
- else
- {
- printf_filtered (_("No instructions have been logged.\n"));
- }
- }
+/* The "record save" command. */
+
+static void
+cmd_record_save (char *args, int from_tty)
+{
+ char *recfilename, recfilename_buffer[40];
+
+ require_record_target ();
+
+ if (args != NULL && *args != 0)
+ recfilename = args;
else
{
- printf_filtered (_("target record is not active.\n"));
+ /* Default recfile name is "gdb_record.PID". */
+ xsnprintf (recfilename_buffer, sizeof (recfilename_buffer),
+ "gdb_record.%d", ptid_get_pid (inferior_ptid));
+ recfilename = recfilename_buffer;
}
- /* Display max log size. */
- printf_filtered (_("Max logged instructions is %d.\n"),
- record_insn_max_num);
+ target_save_record (recfilename);
}
-/* Record log save-file format
- Version 1 (never released)
-
- Header:
- 4 bytes: magic number htonl(0x20090829).
- NOTE: be sure to change whenever this file format changes!
-
- Records:
- record_end:
- 1 byte: record type (record_end, see enum record_type).
- record_reg:
- 1 byte: record type (record_reg, see enum record_type).
- 8 bytes: register id (network byte order).
- MAX_REGISTER_SIZE bytes: register value.
- record_mem:
- 1 byte: record type (record_mem, see enum record_type).
- 8 bytes: memory length (network byte order).
- 8 bytes: memory address (network byte order).
- n bytes: memory value (n == memory length).
-
- Version 2
- 4 bytes: magic number netorder32(0x20091016).
- NOTE: be sure to change whenever this file format changes!
-
- Records:
- record_end:
- 1 byte: record type (record_end, see enum record_type).
- 4 bytes: signal
- 4 bytes: instruction count
- record_reg:
- 1 byte: record type (record_reg, see enum record_type).
- 4 bytes: register id (network byte order).
- n bytes: register value (n == actual register size).
- (eg. 4 bytes for x86 general registers).
- record_mem:
- 1 byte: record type (record_mem, see enum record_type).
- 4 bytes: memory length (network byte order).
- 8 bytes: memory address (network byte order).
- n bytes: memory value (n == memory length).
-
-*/
-
-/* bfdcore_read -- read bytes from a core file section. */
-
-static inline void
-bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset)
+/* See record.h. */
+
+void
+record_goto (const char *arg)
{
- int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len);
+ ULONGEST insn;
- if (ret)
- *offset += len;
- else
- error (_("Failed to read %d bytes from core file %s ('%s').\n"),
- len, bfd_get_filename (obfd),
- bfd_errmsg (bfd_get_error ()));
-}
+ if (arg == NULL || *arg == '\0')
+ error (_("Command requires an argument (insn number to go to)."));
-static inline uint64_t
-netorder64 (uint64_t input)
-{
- uint64_t ret;
+ insn = parse_and_eval_long (arg);
- store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
- BFD_ENDIAN_BIG, input);
- return ret;
+ require_record_target ();
+ target_goto_record (insn);
}
-static inline uint32_t
-netorder32 (uint32_t input)
-{
- uint32_t ret;
+/* "record goto" command. Argument is an instruction number,
+ as given by "info record".
- store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
- BFD_ENDIAN_BIG, input);
- return ret;
+ Rewinds the recording (forward or backward) to the given instruction. */
+
+static void
+cmd_record_goto (char *arg, int from_tty)
+{
+ record_goto (arg);
}
-static inline uint16_t
-netorder16 (uint16_t input)
+/* The "record goto begin" command. */
+
+static void
+cmd_record_goto_begin (char *arg, int from_tty)
{
- uint16_t ret;
+ if (arg != NULL && *arg != '\0')
+ error (_("Junk after argument: %s."), arg);
- store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
- BFD_ENDIAN_BIG, input);
- return ret;
+ require_record_target ();
+ target_goto_record_begin ();
}
-/* Restore the execution log from a core_bfd file. */
+/* The "record goto end" command. */
+
static void
-record_restore (void)
+cmd_record_goto_end (char *arg, int from_tty)
{
- uint32_t magic;
- struct cleanup *old_cleanups;
- struct record_entry *rec;
- asection *osec;
- uint32_t osec_size;
- int bfd_offset = 0;
- struct regcache *regcache;
-
- /* We restore the execution log from the open core bfd,
- if there is one. */
- if (core_bfd == NULL)
- return;
-
- /* "record_restore" can only be called when record list is empty. */
- gdb_assert (record_first.next == NULL);
-
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n");
-
- /* Now need to find our special note section. */
- osec = bfd_get_section_by_name (core_bfd, "null0");
- osec_size = bfd_section_size (core_bfd, osec);
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n",
- osec ? "succeeded" : "failed");
- if (osec == NULL)
- return;
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec));
-
- /* Check the magic code. */
- bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset);
- if (magic != RECORD_FILE_MAGIC)
- error (_("Version mis-match or file format error in core file %s."),
- bfd_get_filename (core_bfd));
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
- Reading 4-byte magic cookie RECORD_FILE_MAGIC (0x%s)\n",
- phex_nz (netorder32 (magic), 4));
-
- /* Restore the entries in recfd into record_arch_list_head and
- record_arch_list_tail. */
- record_arch_list_head = NULL;
- record_arch_list_tail = NULL;
- record_insn_num = 0;
- old_cleanups = make_cleanup (record_arch_list_cleanups, 0);
- regcache = get_current_regcache ();
-
- while (1)
- {
- uint8_t rectype;
- uint32_t regnum, len, signal, count;
- uint64_t addr;
-
- /* We are finished when offset reaches osec_size. */
- if (bfd_offset >= osec_size)
- break;
- bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset);
-
- switch (rectype)
- {
- case record_reg: /* reg */
- /* Get register number to regnum. */
- bfdcore_read (core_bfd, osec, ®num,
- sizeof (regnum), &bfd_offset);
- regnum = netorder32 (regnum);
-
- rec = record_reg_alloc (regcache, regnum);
-
- /* Get val. */
- bfdcore_read (core_bfd, osec, record_get_loc (rec),
- rec->u.reg.len, &bfd_offset);
-
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
- Reading register %d (1 plus %lu plus %d bytes)\n",
- rec->u.reg.num,
- (unsigned long) sizeof (regnum),
- rec->u.reg.len);
- break;
-
- case record_mem: /* mem */
- /* Get len. */
- bfdcore_read (core_bfd, osec, &len,
- sizeof (len), &bfd_offset);
- len = netorder32 (len);
-
- /* Get addr. */
- bfdcore_read (core_bfd, osec, &addr,
- sizeof (addr), &bfd_offset);
- addr = netorder64 (addr);
-
- rec = record_mem_alloc (addr, len);
-
- /* Get val. */
- bfdcore_read (core_bfd, osec, record_get_loc (rec),
- rec->u.mem.len, &bfd_offset);
-
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
- Reading memory %s (1 plus %lu plus %lu plus %d bytes)\n",
- paddress (get_current_arch (),
- rec->u.mem.addr),
- (unsigned long) sizeof (addr),
- (unsigned long) sizeof (len),
- rec->u.mem.len);
- break;
-
- case record_end: /* end */
- rec = record_end_alloc ();
- record_insn_num ++;
-
- /* Get signal value. */
- bfdcore_read (core_bfd, osec, &signal,
- sizeof (signal), &bfd_offset);
- signal = netorder32 (signal);
- rec->u.end.sigval = signal;
-
- /* Get insn count. */
- bfdcore_read (core_bfd, osec, &count,
- sizeof (count), &bfd_offset);
- count = netorder32 (count);
- rec->u.end.insn_num = count;
- record_insn_count = count + 1;
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
- Reading record_end (1 + %lu + %lu bytes), offset == %s\n",
- (unsigned long) sizeof (signal),
- (unsigned long) sizeof (count),
- paddress (get_current_arch (),
- bfd_offset));
- break;
-
- default:
- error (_("Bad entry type in core file %s."),
- bfd_get_filename (core_bfd));
- break;
- }
-
- /* Add rec to record arch list. */
- record_arch_list_add (rec);
- }
+ if (arg != NULL && *arg != '\0')
+ error (_("Junk after argument: %s."), arg);
- discard_cleanups (old_cleanups);
+ require_record_target ();
+ target_goto_record_end ();
+}
- /* Add record_arch_list_head to the end of record list. */
- record_first.next = record_arch_list_head;
- record_arch_list_head->prev = &record_first;
- record_arch_list_tail->next = NULL;
- record_list = &record_first;
+/* Read an instruction number from an argument string. */
- /* Update record_insn_max_num. */
- if (record_insn_num > record_insn_max_num)
- {
- record_insn_max_num = record_insn_num;
- warning (_("Auto increase record/replay buffer limit to %d."),
- record_insn_max_num);
- }
+static ULONGEST
+get_insn_number (char **arg)
+{
+ ULONGEST number;
+ const char *begin, *end, *pos;
- /* Succeeded. */
- printf_filtered (_("Restored records from core file %s.\n"),
- bfd_get_filename (core_bfd));
+ begin = *arg;
+ pos = skip_spaces_const (begin);
- print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
-}
+ if (!isdigit (*pos))
+ error (_("Expected positive number, got: %s."), pos);
-/* bfdcore_write -- write bytes into a core file section. */
+ number = strtoulst (pos, &end, 10);
-static inline void
-bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset)
-{
- int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len);
+ *arg += (end - begin);
- if (ret)
- *offset += len;
- else
- error (_("Failed to write %d bytes to core file %s ('%s').\n"),
- len, bfd_get_filename (obfd),
- bfd_errmsg (bfd_get_error ()));
+ return number;
}
-/* Restore the execution log from a file. We use a modified elf
- corefile format, with an extra section for our data. */
+/* Read a context size from an argument string. */
-static void
-cmd_record_restore (char *args, int from_tty)
+static int
+get_context_size (char **arg)
{
- core_file_command (args, from_tty);
- record_open (args, from_tty);
-}
+ char *pos;
+ int number;
-static void
-record_save_cleanups (void *data)
-{
- bfd *obfd = data;
- char *pathname = xstrdup (bfd_get_filename (obfd));
+ pos = skip_spaces (*arg);
- bfd_close (obfd);
- unlink (pathname);
- xfree (pathname);
+ if (!isdigit (*pos))
+ error (_("Expected positive number, got: %s."), pos);
+
+ return strtol (pos, arg, 10);
}
-/* Save the execution log to a file. We use a modified elf corefile
- format, with an extra section for our data. */
+/* Complain about junk at the end of an argument string. */
static void
-cmd_record_save (char *args, int from_tty)
+no_chunk (char *arg)
{
- char *recfilename, recfilename_buffer[40];
- struct record_entry *cur_record_list;
- uint32_t magic;
- struct regcache *regcache;
- struct gdbarch *gdbarch;
- struct cleanup *old_cleanups;
- struct cleanup *set_cleanups;
- bfd *obfd;
- int save_size = 0;
- asection *osec = NULL;
- int bfd_offset = 0;
-
- if (strcmp (current_target.to_shortname, "record") != 0)
- error (_("This command can only be used with target 'record'.\n"
- "Use 'target record' first.\n"));
-
- if (args && *args)
- recfilename = args;
- else
- {
- /* Default recfile name is "gdb_record.PID". */
- snprintf (recfilename_buffer, sizeof (recfilename_buffer),
- "gdb_record.%d", PIDGET (inferior_ptid));
- recfilename = recfilename_buffer;
- }
-
- /* Open the save file. */
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n",
- recfilename);
+ if (*arg != 0)
+ error (_("Junk after argument: %s."), arg);
+}
- /* Open the output file. */
- obfd = create_gcore_bfd (recfilename);
- old_cleanups = make_cleanup (record_save_cleanups, obfd);
+/* Read instruction-history modifiers from an argument string. */
- /* Save the current record entry to "cur_record_list". */
- cur_record_list = record_list;
+static int
+get_insn_history_modifiers (char **arg)
+{
+ int modifiers;
+ char *args;
- /* Get the values of regcache and gdbarch. */
- regcache = get_current_regcache ();
- gdbarch = get_regcache_arch (regcache);
+ modifiers = 0;
+ args = *arg;
- /* Disable the GDB operation record. */
- set_cleanups = record_gdb_operation_disable_set ();
+ if (args == NULL)
+ return modifiers;
- /* Reverse execute to the begin of record list. */
- while (1)
+ while (*args == '/')
{
- /* Check for beginning and end of log. */
- if (record_list == &record_first)
- break;
-
- record_exec_insn (regcache, gdbarch, record_list);
+ ++args;
- if (record_list->prev)
- record_list = record_list->prev;
- }
+ if (*args == '\0')
+ error (_("Missing modifier."));
- /* Compute the size needed for the extra bfd section. */
- save_size = 4; /* magic cookie */
- for (record_list = record_first.next; record_list;
- record_list = record_list->next)
- switch (record_list->type)
- {
- case record_end:
- save_size += 1 + 4 + 4;
- break;
- case record_reg:
- save_size += 1 + 4 + record_list->u.reg.len;
- break;
- case record_mem:
- save_size += 1 + 4 + 8 + record_list->u.mem.len;
- break;
- }
-
- /* Make the new bfd section. */
- osec = bfd_make_section_anyway_with_flags (obfd, "precord",
- SEC_HAS_CONTENTS
- | SEC_READONLY);
- if (osec == NULL)
- error (_("Failed to create 'precord' section for corefile %s: %s"),
- recfilename,
- bfd_errmsg (bfd_get_error ()));
- bfd_set_section_size (obfd, osec, save_size);
- bfd_set_section_vma (obfd, osec, 0);
- bfd_set_section_alignment (obfd, osec, 0);
- bfd_section_lma (obfd, osec) = 0;
-
- /* Save corefile state. */
- write_gcore_file (obfd);
-
- /* Write out the record log. */
- /* Write the magic code. */
- magic = RECORD_FILE_MAGIC;
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
- Writing 4-byte magic cookie RECORD_FILE_MAGIC (0x%s)\n",
- phex_nz (magic, 4));
- bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset);
-
- /* Save the entries to recfd and forward execute to the end of
- record list. */
- record_list = &record_first;
- while (1)
- {
- /* Save entry. */
- if (record_list != &record_first)
- {
- uint8_t type;
- uint32_t regnum, len, signal, count;
- uint64_t addr;
-
- type = record_list->type;
- bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset);
-
- switch (record_list->type)
- {
- case record_reg: /* reg */
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
- Writing register %d (1 plus %lu plus %d bytes)\n",
- record_list->u.reg.num,
- (unsigned long) sizeof (regnum),
- record_list->u.reg.len);
-
- /* Write regnum. */
- regnum = netorder32 (record_list->u.reg.num);
- bfdcore_write (obfd, osec, ®num,
- sizeof (regnum), &bfd_offset);
-
- /* Write regval. */
- bfdcore_write (obfd, osec, record_get_loc (record_list),
- record_list->u.reg.len, &bfd_offset);
- break;
-
- case record_mem: /* mem */
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
- Writing memory %s (1 plus %lu plus %lu plus %d bytes)\n",
- paddress (gdbarch,
- record_list->u.mem.addr),
- (unsigned long) sizeof (addr),
- (unsigned long) sizeof (len),
- record_list->u.mem.len);
-
- /* Write memlen. */
- len = netorder32 (record_list->u.mem.len);
- bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset);
-
- /* Write memaddr. */
- addr = netorder64 (record_list->u.mem.addr);
- bfdcore_write (obfd, osec, &addr,
- sizeof (addr), &bfd_offset);
-
- /* Write memval. */
- bfdcore_write (obfd, osec, record_get_loc (record_list),
- record_list->u.mem.len, &bfd_offset);
- break;
-
- case record_end:
- if (record_debug)
- fprintf_unfiltered (gdb_stdlog, "\
- Writing record_end (1 + %lu + %lu bytes)\n",
- (unsigned long) sizeof (signal),
- (unsigned long) sizeof (count));
- /* Write signal value. */
- signal = netorder32 (record_list->u.end.sigval);
- bfdcore_write (obfd, osec, &signal,
- sizeof (signal), &bfd_offset);
-
- /* Write insn count. */
- count = netorder32 (record_list->u.end.insn_num);
- bfdcore_write (obfd, osec, &count,
- sizeof (count), &bfd_offset);
- break;
- }
- }
-
- /* Execute entry. */
- record_exec_insn (regcache, gdbarch, record_list);
-
- if (record_list->next)
- record_list = record_list->next;
- else
- break;
- }
+ for (; *args; ++args)
+ {
+ if (isspace (*args))
+ break;
- /* Reverse execute to cur_record_list. */
- while (1)
- {
- /* Check for beginning and end of log. */
- if (record_list == cur_record_list)
- break;
+ if (*args == '/')
+ continue;
- record_exec_insn (regcache, gdbarch, record_list);
+ switch (*args)
+ {
+ case 'm':
+ case 's':
+ modifiers |= DISASSEMBLY_SOURCE;
+ modifiers |= DISASSEMBLY_FILENAME;
+ break;
+ case 'r':
+ modifiers |= DISASSEMBLY_RAW_INSN;
+ break;
+ case 'f':
+ modifiers |= DISASSEMBLY_OMIT_FNAME;
+ break;
+ case 'p':
+ modifiers |= DISASSEMBLY_OMIT_PC;
+ break;
+ default:
+ error (_("Invalid modifier: %c."), *args);
+ }
+ }
- if (record_list->prev)
- record_list = record_list->prev;
+ args = skip_spaces (args);
}
- do_cleanups (set_cleanups);
- bfd_close (obfd);
- discard_cleanups (old_cleanups);
+ /* Update the argument string. */
+ *arg = args;
- /* Succeeded. */
- printf_filtered (_("Saved core file %s with execution log.\n"),
- recfilename);
+ return modifiers;
}
-/* For "record pic" command. */
-
-static struct cmd_list_element *set_record_pic_cmdlist,
- *show_record_pic_cmdlist;
+/* The "set record instruction-history-size / set record
+ function-call-history-size" commands are unsigned, with UINT_MAX
+ meaning unlimited. The target interfaces works with signed int
+ though, to indicate direction, so map "unlimited" to INT_MAX, which
+ is about the same as unlimited in practice. If the user does have
+ a log that huge, she can fetch it in chunks across several requests,
+ but she'll likely have other problems first... */
-static void
-set_record_pic_command (char *args, int from_tty)
+static int
+command_size_to_target_size (unsigned int size)
{
- printf_unfiltered (_("\
-\"set record pic\" must be followed by an apporpriate subcommand.\n"));
- help_list (set_record_cmdlist, "set record pic ", all_commands, gdb_stdout);
-}
+ gdb_assert (size <= INT_MAX || size == UINT_MAX);
-static void
-show_record_pic_command (char *args, int from_tty)
-{
- cmd_show_list (show_record_pic_cmdlist, from_tty, "");
+ if (size == UINT_MAX)
+ return INT_MAX;
+ else
+ return size;
}
-static const char record_pic_function[] = "function";
-static const char record_pic_line[] = "line";
-static const char *record_pic_enum[] =
-{
- record_pic_function,
- record_pic_line,
- NULL,
-};
-static const char *set_record_pic_type = record_pic_line;
-
-static int record_pic_hide_nofunction = 1;
-static int record_pic_hide_nosource = 1;
-static int record_pic_hide_same = 1;
+/* The "record instruction-history" command. */
static void
-record_pic_fputs (FILE *fp, const char *buf)
+cmd_record_insn_history (char *arg, int from_tty)
{
- if (fputs (buf, fp) == EOF)
- error (_("Write to file error."));
-}
+ int flags, size;
-struct function_list
-{
- struct function_list *next;
- CORE_ADDR addr;
- int fid;
-};
-struct node_list
-{
- struct node_list *next;
- int count;
- CORE_ADDR addr;
- int showall;
- struct symtab *symtab;
- int line;
- struct minimal_symbol *function;
- int fid;
-};
-struct edge_list
-{
- struct edge_list *next;
- int count;
- struct node_list *s;
- struct node_list *t;
- int frame_diff;
- int is_return;
-};
-struct function_list *function_list = NULL;
-struct node_list *node_list = NULL;
-struct edge_list *edge_list = NULL;
+ require_record_target ();
-static void
-record_pic_cleanups (void *data)
-{
- FILE *fp = data;
- struct function_list *fl, *fl2;
- struct node_list *nl, *nl2;
- struct edge_list *el, *el2;
+ flags = get_insn_history_modifiers (&arg);
- fl = function_list;
- while (fl)
- {
- fl2 = fl;
- fl = fl->next;
- xfree (fl2);
- }
- function_list = NULL;
+ size = command_size_to_target_size (record_insn_history_size);
- nl = node_list;
- while (nl)
+ if (arg == NULL || *arg == 0 || strcmp (arg, "+") == 0)
+ target_insn_history (size, flags);
+ else if (strcmp (arg, "-") == 0)
+ target_insn_history (-size, flags);
+ else
{
- nl2 = nl;
- nl = nl->next;
- xfree (nl2);
- }
- node_list = NULL;
+ ULONGEST begin, end;
- el = edge_list;
- while (el)
- {
- el2 = el;
- el = el->next;
- xfree (el2);
- }
- edge_list = NULL;
+ begin = get_insn_number (&arg);
- fclose (fp);
-}
+ if (*arg == ',')
+ {
+ arg = skip_spaces (++arg);
-static void
-record_pic_node (char *buf, int buf_max, struct gdbarch *gdbarch,
- const char *type, struct node_list *nlp)
-{
- if (type == record_pic_function)
- {
- snprintf (buf, buf_max, "%s %s %s",
- (nlp->symtab) ? nlp->symtab->filename : "",
- (nlp->function) ? SYMBOL_LINKAGE_NAME (nlp->function) : "",
- (!nlp->function) ? paddress (gdbarch, nlp->addr) : "");
- }
- else
- {
- if (nlp->showall)
- {
- snprintf (buf, buf_max, "%s:%d %s %s", nlp->symtab->filename,
- nlp->line,
- (nlp->function) ? SYMBOL_LINKAGE_NAME (nlp->function) : "",
- paddress (gdbarch, nlp->addr));
- }
+ if (*arg == '+')
+ {
+ arg += 1;
+ size = get_context_size (&arg);
+
+ no_chunk (arg);
+
+ target_insn_history_from (begin, size, flags);
+ }
+ else if (*arg == '-')
+ {
+ arg += 1;
+ size = get_context_size (&arg);
+
+ no_chunk (arg);
+
+ target_insn_history_from (begin, -size, flags);
+ }
+ else
+ {
+ end = get_insn_number (&arg);
+
+ no_chunk (arg);
+
+ target_insn_history_range (begin, end, flags);
+ }
+ }
else
- {
- if (nlp->symtab)
- snprintf (buf, buf_max, "%s %d %s",
- (nlp->function) ? SYMBOL_LINKAGE_NAME (nlp->function) : "",
- nlp->line, paddress (gdbarch, nlp->addr));
- else
- snprintf (buf, buf_max, "%s %s",
- (nlp->function) ? SYMBOL_LINKAGE_NAME (nlp->function) : "",
- paddress (gdbarch, nlp->addr));
- }
+ {
+ no_chunk (arg);
+
+ target_insn_history_from (begin, size, flags);
+ }
+
+ dont_repeat ();
}
}
-static void
-record_pic_edge (char *buf, int buf_max, struct edge_list *elp,
- char *node, char *prev_node)
+/* Read function-call-history modifiers from an argument string. */
+
+static int
+get_call_history_modifiers (char **arg)
{
- if (elp->frame_diff)
+ int modifiers;
+ char *args;
+
+ modifiers = 0;
+ args = *arg;
+
+ if (args == NULL)
+ return modifiers;
+
+ while (*args == '/')
{
- if (elp->is_return)
- snprintf (buf, buf_max, "edge: {color:blue sourcename: \"%s\" "
- "targetname: \"%s\"",
- prev_node, node);
- else
- snprintf (buf, buf_max, "edge: {color:red sourcename: \"%s\" "
- "targetname: \"%s\"",
- prev_node, node);
+ ++args;
+
+ if (*args == '\0')
+ error (_("Missing modifier."));
+
+ for (; *args; ++args)
+ {
+ if (isspace (*args))
+ break;
+
+ if (*args == '/')
+ continue;
+
+ switch (*args)
+ {
+ case 'l':
+ modifiers |= RECORD_PRINT_SRC_LINE;
+ break;
+ case 'i':
+ modifiers |= RECORD_PRINT_INSN_RANGE;
+ break;
+ case 'c':
+ modifiers |= RECORD_PRINT_INDENT_CALLS;
+ break;
+ default:
+ error (_("Invalid modifier: %c."), *args);
+ }
+ }
+
+ args = skip_spaces (args);
}
- else
- snprintf (buf, buf_max,
- "edge: {sourcename: \"%s\" targetname: \"%s\"",
- prev_node, node);
+
+ /* Update the argument string. */
+ *arg = args;
+
+ return modifiers;
}
-/* Save the execution log to a vcg file. */
+/* The "record function-call-history" command. */
static void
-cmd_record_pic (char *args, int from_tty)
+cmd_record_call_history (char *arg, int from_tty)
{
- char *recfilename, recfilename_buffer[40];
- FILE *fp;
- struct cleanup *old_cleanups, *set_cleanups;
- struct regcache *regcache;
- struct gdbarch *gdbarch;
- struct record_entry *cur_record_list;
- char prev_node[256], line[256];
- CORE_ADDR prev_addr;
- struct frame_id fi, caller_fi, prev_fi, prev_caller_fi;
- struct function_list *function_list_tail, *function_list_prev;
- struct edge_list *edge_list_tail = NULL;
- struct node_list *node_list_tail = NULL;
- struct symtab_and_line sal, prev_sal;
- struct node_list *prev_nlp;
- struct node_list prev_nlp_real;
- int fid_count = 1;
-
- /* Check if record target is running. */
- if (current_target.to_stratum != record_stratum)
- error (_("This command can only be used with target 'record' \
-or target 'record-core'."));
-
- if (args && *args)
- recfilename = args;
+ int flags, size;
+
+ require_record_target ();
+
+ flags = get_call_history_modifiers (&arg);
+
+ size = command_size_to_target_size (record_call_history_size);
+
+ if (arg == NULL || *arg == 0 || strcmp (arg, "+") == 0)
+ target_call_history (size, flags);
+ else if (strcmp (arg, "-") == 0)
+ target_call_history (-size, flags);
else
{
- /* Default recfile name is "gdb_record_PID.vcg". */
- snprintf (recfilename_buffer, sizeof (recfilename_buffer),
- "gdb_record_%d.vcg", PIDGET (inferior_ptid));
- recfilename = recfilename_buffer;
- }
+ ULONGEST begin, end;
- /* Open the output file. */
- fp = fopen (recfilename, "wb");
- if (!fp)
- error (_("Unable to open file '%s'"), recfilename);
+ begin = get_insn_number (&arg);
- old_cleanups = make_cleanup (record_pic_cleanups, fp);
+ if (*arg == ',')
+ {
+ arg = skip_spaces (++arg);
- /* Save the current record entry to "cur_record_list". */
- cur_record_list = record_list;
+ if (*arg == '+')
+ {
+ arg += 1;
+ size = get_context_size (&arg);
- /* Get the values of regcache and gdbarch. */
- regcache = get_current_regcache ();
- gdbarch = get_regcache_arch (regcache);
+ no_chunk (arg);
- /* Disable the GDB operation record. */
- set_cleanups = record_gdb_operation_disable_set ();
+ target_call_history_from (begin, size, flags);
+ }
+ else if (*arg == '-')
+ {
+ arg += 1;
+ size = get_context_size (&arg);
- /* Reverse execute to the begin of record list. */
- while (1)
- {
- /* Check for beginning and end of log. */
- if (record_list == &record_first)
- break;
+ no_chunk (arg);
- record_exec_insn (regcache, gdbarch, record_list);
+ target_call_history_from (begin, -size, flags);
+ }
+ else
+ {
+ end = get_insn_number (&arg);
- if (record_list->prev)
- record_list = record_list->prev;
- }
+ no_chunk (arg);
- /* Write out the record log. */
- /* Write the head. */
- record_pic_fputs (fp, "graph: {title: \"GDB process record\"\n");
-
- /* Write the first node. */
- record_pic_fputs (fp, "node: {title: \"[BEGIN]\" vertical_order:0}\n");
-
- /* Initialization. */
- snprintf (prev_node, 256, "[BEGIN]");
- prev_fi = null_frame_id;
- prev_caller_fi = null_frame_id;
- prev_addr = 0;
- prev_sal.symtab = NULL;
- prev_sal.pc = 0;
- prev_sal.end = 0;
- prev_nlp_real.addr = 0;
- prev_nlp = &prev_nlp_real;
-
- /* Create first entry for function_list. */
- function_list = xmalloc (sizeof (struct function_list));
- function_list->next = NULL;
- function_list->addr = 0;
- function_list->fid = -1;
- function_list_tail = function_list;
- function_list_prev = function_list;
-
- /* Save the entries to fp and forward execute to the end of
- record list. */
- record_list = &record_first;
- while (1)
- {
- if (record_list->type == record_end)
- {
- int frame_diff = 0;
- CORE_ADDR addr = regcache_read_pc (regcache);
-
- /* Check if the ADDR is stil in the same line with the
- prev cycle. */
- if (prev_sal.symtab
- && addr >= prev_sal.pc && addr < prev_sal.end)
- goto exec;
- sal = find_pc_line (addr, 0);
-
- if (record_pic_hide_nosource && !sal.symtab)
- goto exec;
-
- /* Check if the inferior is in same frame with prev cycle.
- Check both the current fi and caller fi because the last
- addr of function is different with current function. */
- reinit_frame_cache ();
- fi = get_frame_id (get_current_frame ());
- caller_fi = frame_unwind_caller_id (get_current_frame ());
- if (!frame_id_eq (prev_fi, fi)
- && !frame_id_eq (prev_caller_fi, caller_fi))
- frame_diff = 1;
-
- if (set_record_pic_type == record_pic_line || frame_diff)
- {
- int is_return = 0;
- struct node_list *nlp = NULL;
- struct edge_list *elp = NULL;
- char node[256];
- struct minimal_symbol *function;
-
- /* Get the node addr. */
- if (set_record_pic_type == record_pic_function)
- {
- /* Get the start addr of function. */
- addr = get_pc_function_start (addr);
- if (addr == 0)
- {
- if (record_pic_hide_nofunction)
- goto exec;
- addr = regcache_read_pc (regcache);
- }
- }
- else
- {
- /* Get the start addr of line. */
- if (sal.symtab)
- addr = sal.pc;
- }
-
- function = lookup_minimal_symbol_by_pc (addr);
- if (!function && record_pic_hide_nofunction)
- goto exec;
-
- if (frame_id_eq (fi, prev_caller_fi))
- is_return = 1;
-
- if (record_pic_hide_same)
- {
- /* Check if addr in node_list. */
- for (nlp = node_list; nlp; nlp = nlp->next)
- {
- if (nlp->addr == addr)
- {
- if (!is_return
- || set_record_pic_type != record_pic_function)
- nlp->count ++;
- break;
- }
- }
-
- /* Check if prev_addr and addr in edge_list. */
- if (nlp)
- {
- for (elp = edge_list; elp; elp = elp->next)
- {
- if (elp->s->addr == prev_addr && elp->t->addr == addr)
- {
- elp->count ++;
- break;
- }
- }
- }
- }
-
- if (!nlp)
- {
- struct node_list nl;
- CORE_ADDR function_addr;
- struct function_list *flp;
-
- nl.addr = addr;
- if (frame_diff && sal.symtab)
- nl.showall = 1;
- else
- nl.showall = 0;
- nl.symtab = sal.symtab;
- nl.line = sal.line;
- nl.function = function;
-
- /* Get the fid of the nl. */
- if (set_record_pic_type != record_pic_function)
- function_addr = get_pc_function_start (addr);
- else
- function_addr = addr;
- if (function_list_prev->addr == function_addr)
- nl.fid = function_list_prev->fid;
- else
- {
- for (flp = function_list; flp; flp = flp->next)
- {
- if (flp->addr == function_addr)
- {
- nl.fid = flp->fid;
- break;
- }
- }
- if (flp == NULL)
- {
- /* Creat a new entry to function_list. */
- nl.fid = fid_count ++;
- flp = xmalloc (sizeof (struct function_list));
- flp->addr = function_addr;
- flp->fid = nl.fid;
- flp->next = NULL;
- function_list_tail->next = flp;
- function_list_tail = flp;
- }
- function_list_prev = flp;
- }
-
- if (record_pic_hide_same)
- {
- nlp = xmalloc (sizeof (struct node_list));
- *nlp = nl;
- nlp->count = 1;
-
- /* Add node to node_list. */
- nlp->next = NULL;
- if (node_list_tail)
- node_list_tail->next = nlp;
- if (node_list == NULL)
- node_list = nlp;
- node_list_tail = nlp;
- }
- else
- {
- /* Draw the node. */
- record_pic_node (node, 256, gdbarch,
- set_record_pic_type, &nl);
- snprintf (line, 256, "%s i:%s", node,
- pulongest (record_list->u.end.insn_num));
- strcpy (node, line);
- snprintf (line, 256, "node: {title: \"%s\" "
- "vertical_order: %d}\n",
- node, nl.fid);
- record_pic_fputs (fp, line);
- }
- }
-
- if (!elp)
- {
- struct edge_list el;
-
- el.is_return = is_return;
- el.frame_diff = frame_diff;
-
- if (record_pic_hide_same)
- {
- elp = xmalloc (sizeof (struct edge_list));
- *elp = el;
- elp->s = prev_nlp;
- elp->t = nlp;
- elp->count = 1;
-
- /* Add edge to edge_list. */
- elp->next = NULL;
- if (edge_list_tail)
- edge_list_tail->next = elp;
- if (edge_list == NULL)
- edge_list = elp;
- edge_list_tail = elp;
- }
- else
- {
- /* Draw the edge. */
- record_pic_edge (line, 256, &el, node, prev_node);
- record_pic_fputs (fp, line);
- record_pic_fputs (fp, " }\n");
- }
- }
-
- if (record_pic_hide_same)
- prev_nlp = nlp;
- else
- snprintf (prev_node, 256, "%s", node);
- prev_addr = addr;
- }
-
- prev_sal = sal;
- prev_fi = fi;
- prev_caller_fi = caller_fi;
- }
-
-exec:
- /* Execute entry. */
- record_exec_insn (regcache, gdbarch, record_list);
-
- if (record_list->next)
- record_list = record_list->next;
+ target_call_history_range (begin, end, flags);
+ }
+ }
else
- break;
- }
+ {
+ no_chunk (arg);
- if (record_pic_hide_same)
- {
- struct node_list *nlp = NULL;
- struct edge_list *elp = NULL;
- char node[256];
-
- for (nlp = node_list; nlp; nlp = nlp->next)
- {
- /* Draw the node. */
- record_pic_node (node, 256, gdbarch, set_record_pic_type, nlp);
- snprintf (line, 256, "node: {title: \"%s c:%d\" "
- "vertical_order: %d}\n", node,
- nlp->count, nlp->fid);
- record_pic_fputs (fp, line);
+ target_call_history_from (begin, size, flags);
}
- record_pic_node (node, 256, gdbarch, set_record_pic_type, edge_list->t);
- snprintf (line, 256,
- "edge: {color:red sourcename: \"[BEGIN]\" targetname: \"%s c:%d\"}\n",
- node, edge_list->count);
- record_pic_fputs (fp, line);
- for (elp = edge_list->next; elp; elp = elp->next)
- {
- /* Draw the edge. */
- record_pic_node (prev_node, 256, gdbarch, set_record_pic_type,
- elp->s);
- snprintf (line, 256, "%s c:%d", prev_node, elp->s->count);
- strcpy (prev_node, line);
- record_pic_node (node, 256, gdbarch, set_record_pic_type,
- elp->t);
- snprintf (line, 256, "%s c:%d", node, elp->t->count);
- strcpy (node, line);
- record_pic_edge (line, 256, elp, node, prev_node);
- record_pic_fputs (fp, line);
- snprintf (line, 256, " label: \"c:%d\"}\n", elp->count);
- record_pic_fputs (fp, line);
- }
+ dont_repeat ();
}
+}
- /* Write the last node. */
- snprintf (line, 256, "node: {title: \"[END]\" vertical_order: %d}\n",
- fid_count);
- record_pic_fputs (fp, line);
- snprintf (line, 256,
- "edge: {color:red sourcename: \"%s\" targetname: \"[END]\" }\n",
- prev_node);
- record_pic_fputs (fp, line);
-
- /* Write the tail. */
- record_pic_fputs (fp, "}\n");
+/* Helper for "set record instruction-history-size" and "set record
+ function-call-history-size" input validation. COMMAND_VAR is the
+ variable registered in the command as control variable. *SETTING
+ is the real setting the command allows changing. */
- /* Reverse execute to cur_record_list. */
- while (1)
+static void
+validate_history_size (unsigned int *command_var, unsigned int *setting)
+{
+ if (*command_var != UINT_MAX && *command_var > INT_MAX)
{
- /* Check for beginning and end of log. */
- if (record_list == cur_record_list)
- break;
-
- record_exec_insn (regcache, gdbarch, record_list);
+ unsigned int new_value = *command_var;
- if (record_list->prev)
- record_list = record_list->prev;
+ /* Restore previous value. */
+ *command_var = *setting;
+ error (_("integer %u out of range"), new_value);
}
- do_cleanups (set_cleanups);
- do_cleanups (old_cleanups);
-
- /* Succeeded. */
- printf_filtered (_("Saved file %s with execution log.\n"),
- recfilename);
+ /* Commit new value. */
+ *setting = *command_var;
}
-/* record_goto_insn -- rewind the record log (forward or backward,
- depending on DIR) to the given entry, changing the program state
- correspondingly. */
+/* Called by do_setshow_command. We only want values in the
+ [0..INT_MAX] range, while the command's machinery accepts
+ [0..UINT_MAX]. See command_size_to_target_size. */
static void
-record_goto_insn (struct record_entry *entry,
- enum exec_direction_kind dir)
+set_record_insn_history_size (char *args, int from_tty,
+ struct cmd_list_element *c)
{
- struct cleanup *set_cleanups = record_gdb_operation_disable_set ();
- struct regcache *regcache = get_current_regcache ();
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
-
- /* Assume everything is valid: we will hit the entry,
- and we will not hit the end of the recording. */
-
- if (dir == EXEC_FORWARD)
- record_list = record_list->next;
-
- do
- {
- record_exec_insn (regcache, gdbarch, record_list);
- if (dir == EXEC_REVERSE)
- record_list = record_list->prev;
- else
- record_list = record_list->next;
- } while (record_list != entry);
- do_cleanups (set_cleanups);
+ validate_history_size (&record_insn_history_size_setshow_var,
+ &record_insn_history_size);
}
-/* "record goto" command. Argument is an instruction number,
- as given by "info record".
-
- Rewinds the recording (forward or backward) to the given instruction. */
+/* Called by do_setshow_command. We only want values in the
+ [0..INT_MAX] range, while the command's machinery accepts
+ [0..UINT_MAX]. See command_size_to_target_size. */
static void
-cmd_record_goto (char *arg, int from_tty)
+set_record_call_history_size (char *args, int from_tty,
+ struct cmd_list_element *c)
{
- struct record_entry *p = NULL;
- ULONGEST target_insn = 0;
-
- if (arg == NULL || *arg == '\0')
- error (_("Command requires an argument (insn number to go to)."));
-
- if (strncmp (arg, "start", strlen ("start")) == 0
- || strncmp (arg, "begin", strlen ("begin")) == 0)
- {
- /* Special case. Find first insn. */
- for (p = &record_first; p != NULL; p = p->next)
- if (p->type == record_end)
- break;
- if (p)
- target_insn = p->u.end.insn_num;
- }
- else if (strncmp (arg, "end", strlen ("end")) == 0)
- {
- /* Special case. Find last insn. */
- for (p = record_list; p->next != NULL; p = p->next)
- ;
- for (; p!= NULL; p = p->prev)
- if (p->type == record_end)
- break;
- if (p)
- target_insn = p->u.end.insn_num;
- }
- else
- {
- /* General case. Find designated insn. */
- target_insn = parse_and_eval_long (arg);
-
- for (p = &record_first; p != NULL; p = p->next)
- if (p->type == record_end && p->u.end.insn_num == target_insn)
- break;
- }
-
- if (p == NULL)
- error (_("Target insn '%s' not found."), arg);
- else if (p == record_list)
- error (_("Already at insn '%s'."), arg);
- else if (p->u.end.insn_num > record_list->u.end.insn_num)
- {
- printf_filtered (_("Go forward to insn number %s\n"),
- pulongest (target_insn));
- record_goto_insn (p, EXEC_FORWARD);
- }
- else
- {
- printf_filtered (_("Go backward to insn number %s\n"),
- pulongest (target_insn));
- record_goto_insn (p, EXEC_REVERSE);
- }
- registers_changed ();
- reinit_frame_cache ();
- print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
+ validate_history_size (&record_call_history_size_setshow_var,
+ &record_call_history_size);
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_record;
+
void
_initialize_record (void)
{
struct cmd_list_element *c;
- /* Init record_first. */
- record_first.prev = NULL;
- record_first.next = NULL;
- record_first.type = record_end;
-
- init_record_ops ();
- add_target (&record_ops);
- init_record_core_ops ();
- add_target (&record_core_ops);
-
- add_setshow_zinteger_cmd ("record", no_class, &record_debug,
- _("Set debugging of record/replay feature."),
- _("Show debugging of record/replay feature."),
- _("When enabled, debugging output for "
- "record/replay feature is displayed."),
- NULL, show_record_debug, &setdebuglist,
- &showdebuglist);
+ add_setshow_zuinteger_cmd ("record", no_class, &record_debug,
+ _("Set debugging of record/replay feature."),
+ _("Show debugging of record/replay feature."),
+ _("When enabled, debugging output for "
+ "record/replay feature is displayed."),
+ NULL, show_record_debug, &setdebuglist,
+ &showdebuglist);
+
+ add_setshow_uinteger_cmd ("instruction-history-size", no_class,
+ &record_insn_history_size_setshow_var, _("\
+Set number of instructions to print in \"record instruction-history\"."), _("\
+Show number of instructions to print in \"record instruction-history\"."), _("\
+A size of \"unlimited\" means unlimited instructions. The default is 10."),
+ set_record_insn_history_size, NULL,
+ &set_record_cmdlist, &show_record_cmdlist);
+
+ add_setshow_uinteger_cmd ("function-call-history-size", no_class,
+ &record_call_history_size_setshow_var, _("\
+Set number of function to print in \"record function-call-history\"."), _("\
+Show number of functions to print in \"record function-call-history\"."), _("\
+A size of \"unlimited\" means unlimited lines. The default is 10."),
+ set_record_call_history_size, NULL,
+ &set_record_cmdlist, &show_record_cmdlist);
c = add_prefix_cmd ("record", class_obscure, cmd_record_start,
- _("Abbreviated form of \"target record\" command."),
+ _("Start recording."),
&record_cmdlist, "record ", 0, &cmdlist);
set_cmd_completer (c, filename_completer);
&record_cmdlist);
set_cmd_completer (c, filename_completer);
- c = add_cmd ("restore", class_obscure, cmd_record_restore,
- _("Restore the execution log from a file.\n\
-Argument is filename. File must be created with 'record save'."),
- &record_cmdlist);
- set_cmd_completer (c, filename_completer);
-
add_cmd ("delete", class_obscure, cmd_record_delete,
_("Delete the rest of execution log and start recording it anew."),
&record_cmdlist);
&record_cmdlist);
add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist);
- /* Record instructions number limit command. */
- add_setshow_boolean_cmd ("stop-at-limit", no_class,
- &record_stop_at_limit, _("\
-Set whether record/replay stops when record/replay buffer becomes full."), _("\
-Show whether record/replay stops when record/replay buffer becomes full."), _("\
-Default is ON.\n\
-When ON, if the record/replay buffer becomes full, ask user what to do.\n\
-When OFF, if the record/replay buffer becomes full,\n\
-delete the oldest recorded instruction to make room for each new one."),
- NULL, NULL,
- &set_record_cmdlist, &show_record_cmdlist);
- add_setshow_uinteger_cmd ("insn-number-max", no_class,
- &record_insn_max_num,
- _("Set record/replay buffer limit."),
- _("Show record/replay buffer limit."), _("\
-Set the maximum number of instructions to be stored in the\n\
-record/replay buffer. Zero means unlimited. Default is 200000."),
- set_record_insn_max_num,
- NULL, &set_record_cmdlist, &show_record_cmdlist);
-
- add_cmd ("goto", class_obscure, cmd_record_goto, _("\
+ add_prefix_cmd ("goto", class_obscure, cmd_record_goto, _("\
Restore the program to its state at instruction number N.\n\
Argument is instruction number, as shown by 'info record'."),
- &record_cmdlist);
-
- add_setshow_boolean_cmd ("memory-query", no_class,
- &record_memory_query, _("\
-Set whether query if PREC cannot record memory change of next instruction."),
- _("\
-Show whether query if PREC cannot record memory change of next instruction."),
- _("\
-Default is OFF.\n\
-When ON, query if PREC cannot record memory change of next instruction."),
- NULL, NULL,
- &set_record_cmdlist, &show_record_cmdlist);
-
- /* For "record pic" command. */
- c = add_cmd ("pic", class_obscure, cmd_record_pic,
- _("Save the execution log to a vcg file.\n\
-Argument is optional filename.\n\
-Default filename is 'gdb_record_<process_id>.vcg'."),
- &record_cmdlist);
- set_cmd_completer (c, filename_completer);
- add_prefix_cmd ("pic", class_support, set_record_pic_command,
- _("Set record pic options"), &set_record_pic_cmdlist,
- "set record pic ", 0, &set_record_cmdlist);
- add_prefix_cmd ("pic", class_support, show_record_pic_command,
- _("Show record pic options"), &show_record_pic_cmdlist,
- "show record pic ", 0, &show_record_cmdlist);
- add_setshow_enum_cmd ("type", no_class,
- record_pic_enum, &set_record_pic_type, _("\
-Set the type of the nodes that record pic command saved."), _("\
-Show the type of the nodes that record pic command saved."), _("\
-When LINE, each node of vcg file that command record pic saved\n\
-will be a line of the inferior.\n\
-When FUNCTION, each node of vcg file that command record pic saved\n\
-will be a function of the inferior."),
- NULL, NULL,
- &set_record_pic_cmdlist, &show_record_pic_cmdlist);
- add_setshow_boolean_cmd ("hide-nofunction", no_class,
- &record_pic_hide_nofunction, _("\
-Set whether record pic command hide the nodes that don't have the function name."), _("\
-Show whether record pic command hide the nodes that don't have the function name."), _("\
-Default is ON.\n\
-When ON, record pic command will hide the nodes that don't have\n\
-the function name.\n\
-When OFF, record pic command will show the nodes that don't have\n\
-the function name."),
- NULL, NULL,
- &set_record_pic_cmdlist, &show_record_pic_cmdlist);
- add_setshow_boolean_cmd ("hide-nosource", no_class,
- &record_pic_hide_nosource, _("\
-Set whether record pic command hide the nodes that don't have the source message."), _("\
-Show whether record pic command hide the nodes that don't have the source message."), _("\
-Default is ON.\n\
-When ON, record pic command will hide the nodes that don't have\n\
-the source message.\n\
-When OFF, record pic command will show the nodes that don't have\n\
-the source message."),
- NULL, NULL,
- &set_record_pic_cmdlist, &show_record_pic_cmdlist);
- add_setshow_boolean_cmd ("hide-sameaddr", no_class,
- &record_pic_hide_same, _("\
-Set whether record pic command hide the nodes that have the same address node in vcg file."), _("\
-Show whether record pic command hide the nodes that have the same address node in vcg file."), _("\
-Default is ON.\n\
-When ON, record pic command will hide the nodes that have\n\
-the same address node in vcg file.\n\
-And record pic will show the execute count number of this line\n\
-in format \"c:number\".\n\
-When OFF, record pic command will show the nodes that have\n\
-the same address node in vcg file.\n\
-And record pic show the instruction number in format \"i:number\"\n\
-that \"record goto\" support."),
- NULL, NULL,
- &set_record_pic_cmdlist, &show_record_pic_cmdlist);
+ &record_goto_cmdlist, "record goto ", 1, &record_cmdlist);
+
+ add_cmd ("begin", class_obscure, cmd_record_goto_begin,
+ _("Go to the beginning of the execution log."),
+ &record_goto_cmdlist);
+ add_alias_cmd ("start", "begin", class_obscure, 1, &record_goto_cmdlist);
+
+ add_cmd ("end", class_obscure, cmd_record_goto_end,
+ _("Go to the end of the execution log."),
+ &record_goto_cmdlist);
+
+ add_cmd ("instruction-history", class_obscure, cmd_record_insn_history, _("\
+Print disassembled instructions stored in the execution log.\n\
+With a /m or /s modifier, source lines are included (if available).\n\
+With a /r modifier, raw instructions in hex are included.\n\
+With a /f modifier, function names are omitted.\n\
+With a /p modifier, current position markers are omitted.\n\
+With no argument, disassembles ten more instructions after the previous \
+disassembly.\n\
+\"record instruction-history -\" disassembles ten instructions before a \
+previous disassembly.\n\
+One argument specifies an instruction number as shown by 'info record', and \
+ten instructions are disassembled after that instruction.\n\
+Two arguments with comma between them specify starting and ending instruction \
+numbers to disassemble.\n\
+If the second argument is preceded by '+' or '-', it specifies the distance \
+from the first argument.\n\
+The number of instructions to disassemble can be defined with \"set record \
+instruction-history-size\"."),
+ &record_cmdlist);
+
+ add_cmd ("function-call-history", class_obscure, cmd_record_call_history, _("\
+Prints the execution history at function granularity.\n\
+It prints one line for each sequence of instructions that belong to the same \
+function.\n\
+Without modifiers, it prints the function name.\n\
+With a /l modifier, the source file and line number range is included.\n\
+With a /i modifier, the instruction number range is included.\n\
+With a /c modifier, the output is indented based on the call stack depth.\n\
+With no argument, prints ten more lines after the previous ten-line print.\n\
+\"record function-call-history -\" prints ten lines before a previous ten-line \
+print.\n\
+One argument specifies a function number as shown by 'info record', and \
+ten lines are printed after that function.\n\
+Two arguments with comma between them specify a range of functions to print.\n\
+If the second argument is preceded by '+' or '-', it specifies the distance \
+from the first argument.\n\
+The number of functions to print can be defined with \"set record \
+function-call-history-size\"."),
+ &record_cmdlist);
+
+ /* Sync command control variables. */
+ record_insn_history_size_setshow_var = record_insn_history_size;
+ record_call_history_size_setshow_var = record_call_history_size;
}
projects / thirdparty / binutils-gdb.git / blobdiff