/* Handle JIT code generation in the inferior for GDB, the GNU Debugger.
- Copyright (C) 2009-2012 Free Software Foundation, Inc.
+ Copyright (C) 2009-2013 Free Software Foundation, Inc.
This file is part of GDB.
#include "breakpoint.h"
#include "command.h"
#include "dictionary.h"
+#include "filenames.h"
#include "frame-unwind.h"
#include "gdbcmd.h"
#include "gdbcore.h"
static const char *const jit_descriptor_name = "__jit_debug_descriptor";
-static const struct inferior_data *jit_inferior_data = NULL;
+static const struct program_space_data *jit_program_space_data = NULL;
static void jit_inferior_init (struct gdbarch *gdbarch);
mem_bfd_iovec_close (struct bfd *abfd, void *stream)
{
xfree (stream);
- return 1;
+
+ /* Zero means success. */
+ return 0;
}
/* For reading the file, we just need to pass through to target_read_memory and
if (loaded_jit_reader != NULL)
error (_("JIT reader already loaded. Run jit-reader-unload first."));
- so_name = xstrprintf ("%s/%s", jit_reader_dir, args);
+ if (IS_ABSOLUTE_PATH (args))
+ so_name = xstrdup (args);
+ else
+ so_name = xstrprintf ("%s%s%s", SLASH_STRING, jit_reader_dir, args);
prev_cleanup = make_cleanup (xfree, so_name);
loaded_jit_reader = jit_reader_load (so_name);
loaded_jit_reader = NULL;
}
-/* Per-inferior structure recording which objfile has the JIT
+/* Per-program space structure recording which objfile has the JIT
symbols. */
-struct jit_inferior_data
+struct jit_program_space_data
{
/* The objfile. This is NULL if no objfile holds the JIT
symbols. */
struct objfile *objfile;
+
+ /* If this program space has __jit_debug_register_code, this is the
+ cached address from the minimal symbol. This is used to detect
+ relocations requiring the breakpoint to be re-created. */
+
+ CORE_ADDR cached_code_address;
+
+ /* This is the JIT event breakpoint, or NULL if it has not been
+ set. */
+
+ struct breakpoint *jit_breakpoint;
};
-/* Per-objfile structure recording the addresses in the inferior. */
+/* Per-objfile structure recording the addresses in the program space.
+ This object serves two purposes: for ordinary objfiles, it may
+ cache some symbols related to the JIT interface; and for
+ JIT-created objfiles, it holds some information about the
+ jit_code_entry. */
struct jit_objfile_data
{
/* Symbol for __jit_debug_descriptor. */
struct minimal_symbol *descriptor;
- /* Address of struct jit_code_entry in this objfile. */
+ /* Address of struct jit_code_entry in this objfile. This is only
+ non-zero for objfiles that represent code created by the JIT. */
CORE_ADDR addr;
};
objf_data->addr = entry;
}
-/* Return jit_inferior_data for current inferior. Allocate if not already
- present. */
+/* Return jit_program_space_data for current program space. Allocate
+ if not already present. */
-static struct jit_inferior_data *
-get_jit_inferior_data (void)
+static struct jit_program_space_data *
+get_jit_program_space_data (void)
{
- struct inferior *inf;
- struct jit_inferior_data *inf_data;
+ struct jit_program_space_data *ps_data;
- inf = current_inferior ();
- inf_data = inferior_data (inf, jit_inferior_data);
- if (inf_data == NULL)
+ ps_data = program_space_data (current_program_space, jit_program_space_data);
+ if (ps_data == NULL)
{
- inf_data = XZALLOC (struct jit_inferior_data);
- set_inferior_data (inf, jit_inferior_data, inf_data);
+ ps_data = XZALLOC (struct jit_program_space_data);
+ set_program_space_data (current_program_space, jit_program_space_data,
+ ps_data);
}
- return inf_data;
+ return ps_data;
}
static void
-jit_inferior_data_cleanup (struct inferior *inf, void *arg)
+jit_program_space_data_cleanup (struct program_space *ps, void *arg)
{
xfree (arg);
}
static int
jit_read_descriptor (struct gdbarch *gdbarch,
struct jit_descriptor *descriptor,
- struct jit_inferior_data *inf_data)
+ struct jit_program_space_data *ps_data)
{
int err;
struct type *ptr_type;
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct jit_objfile_data *objf_data;
- if (inf_data->objfile == NULL)
+ if (ps_data->objfile == NULL)
return 0;
- objf_data = get_jit_objfile_data (inf_data->objfile);
+ objf_data = get_jit_objfile_data (ps_data->objfile);
if (objf_data->descriptor == NULL)
return 0;
i--, gdb_block_iter = gdb_block_iter->next)
{
struct block *new_block = allocate_block (&objfile->objfile_obstack);
- struct symbol *block_name = obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct symbol));
+ struct symbol *block_name = allocate_symbol (objfile);
struct type *block_type = arch_type (get_objfile_arch (objfile),
TYPE_CODE_VOID,
1,
BLOCK_END (new_block) = (CORE_ADDR) gdb_block_iter->end;
/* The name. */
- memset (block_name, 0, sizeof (struct symbol));
SYMBOL_DOMAIN (block_name) = VAR_DOMAIN;
- SYMBOL_CLASS (block_name) = LOC_BLOCK;
+ SYMBOL_ACLASS_INDEX (block_name) = LOC_BLOCK;
SYMBOL_SYMTAB (block_name) = symtab;
SYMBOL_TYPE (block_name) = lookup_function_type (block_type);
SYMBOL_BLOCK_VALUE (block_name) = new_block;
- block_name->ginfo.name = obsavestring (gdb_block_iter->name,
- strlen (gdb_block_iter->name),
- &objfile->objfile_obstack);
+ block_name->ginfo.name = obstack_copy0 (&objfile->objfile_obstack,
+ gdb_block_iter->name,
+ strlen (gdb_block_iter->name));
BLOCK_FUNCTION (new_block) = block_name;
gdb_block_iter = gdb_block_iter->next)
{
if (gdb_block_iter->parent != NULL)
- BLOCK_SUPERBLOCK (gdb_block_iter->real_block) =
- gdb_block_iter->parent->real_block;
+ {
+ /* If the plugin specifically mentioned a parent block, we
+ use that. */
+ BLOCK_SUPERBLOCK (gdb_block_iter->real_block) =
+ gdb_block_iter->parent->real_block;
+ }
+ else
+ {
+ /* And if not, we set a default parent block. */
+ BLOCK_SUPERBLOCK (gdb_block_iter->real_block) =
+ BLOCKVECTOR_BLOCK (symtab->blockvector, STATIC_BLOCK);
+ }
}
/* Free memory. */
priv_data = cb->priv_data;
- objfile = allocate_objfile (NULL, 0);
- objfile->gdbarch = target_gdbarch;
+ objfile = allocate_objfile (NULL, "<< JIT compiled code >>",
+ OBJF_NOT_FILENAME);
+ objfile->per_bfd->gdbarch = target_gdbarch ();
terminate_minimal_symbol_table (objfile);
- xfree (objfile->name);
- objfile->name = xstrdup ("<< JIT compiled code >>");
-
j = NULL;
for (i = obj->symtabs; i; i = j)
{
sai->other[i].sectindex = sec->index;
++i;
}
+ sai->num_sections = i;
/* This call does not take ownership of SAI. */
make_cleanup_bfd_unref (nbfd);
- objfile = symbol_file_add_from_bfd (nbfd, 0, sai, OBJF_SHARED, NULL);
+ objfile = symbol_file_add_from_bfd (nbfd, bfd_get_filename (nbfd), 0, sai,
+ OBJF_SHARED | OBJF_NOT_FILENAME, NULL);
do_cleanups (old_cleanups);
add_objfile_entry (objfile, entry_addr);
jit_register_code (struct gdbarch *gdbarch,
CORE_ADDR entry_addr, struct jit_code_entry *code_entry)
{
- int i, success;
- const struct bfd_arch_info *b;
- struct jit_inferior_data *inf_data = get_jit_inferior_data ();
+ int success;
if (jit_debug)
fprintf_unfiltered (gdb_stdlog,
return NULL;
}
+/* This is called when a breakpoint is deleted. It updates the
+ inferior's cache, if needed. */
+
+static void
+jit_breakpoint_deleted (struct breakpoint *b)
+{
+ struct bp_location *iter;
+
+ if (b->type != bp_jit_event)
+ return;
+
+ for (iter = b->loc; iter != NULL; iter = iter->next)
+ {
+ struct jit_program_space_data *ps_data;
+
+ ps_data = program_space_data (iter->pspace, jit_program_space_data);
+ if (ps_data != NULL && ps_data->jit_breakpoint == iter->owner)
+ {
+ ps_data->cached_code_address = 0;
+ ps_data->jit_breakpoint = NULL;
+ }
+ }
+}
+
/* (Re-)Initialize the jit breakpoint if necessary.
Return 0 on success. */
static int
jit_breakpoint_re_set_internal (struct gdbarch *gdbarch,
- struct jit_inferior_data *inf_data)
+ struct jit_program_space_data *ps_data)
{
- struct minimal_symbol *reg_symbol, *desc_symbol;
- struct objfile *objf;
+ struct bound_minimal_symbol reg_symbol;
+ struct minimal_symbol *desc_symbol;
struct jit_objfile_data *objf_data;
+ CORE_ADDR addr;
- if (inf_data->objfile != NULL)
- return 0;
-
- /* Lookup the registration symbol. If it is missing, then we assume
- we are not attached to a JIT. */
- reg_symbol = lookup_minimal_symbol_and_objfile (jit_break_name, &objf);
- if (reg_symbol == NULL || SYMBOL_VALUE_ADDRESS (reg_symbol) == 0)
- return 1;
-
- desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, objf);
- if (desc_symbol == NULL || SYMBOL_VALUE_ADDRESS (desc_symbol) == 0)
- return 1;
-
- objf_data = get_jit_objfile_data (objf);
- objf_data->register_code = reg_symbol;
- objf_data->descriptor = desc_symbol;
-
- inf_data->objfile = objf;
+ if (ps_data->objfile == NULL)
+ {
+ /* Lookup the registration symbol. If it is missing, then we
+ assume we are not attached to a JIT. */
+ reg_symbol = lookup_minimal_symbol_and_objfile (jit_break_name);
+ if (reg_symbol.minsym == NULL
+ || SYMBOL_VALUE_ADDRESS (reg_symbol.minsym) == 0)
+ return 1;
+
+ desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL,
+ reg_symbol.objfile);
+ if (desc_symbol == NULL || SYMBOL_VALUE_ADDRESS (desc_symbol) == 0)
+ return 1;
+
+ objf_data = get_jit_objfile_data (reg_symbol.objfile);
+ objf_data->register_code = reg_symbol.minsym;
+ objf_data->descriptor = desc_symbol;
+
+ ps_data->objfile = reg_symbol.objfile;
+ }
+ else
+ objf_data = get_jit_objfile_data (ps_data->objfile);
- jit_inferior_init (gdbarch);
+ addr = SYMBOL_VALUE_ADDRESS (objf_data->register_code);
if (jit_debug)
fprintf_unfiltered (gdb_stdlog,
"jit_breakpoint_re_set_internal, "
"breakpoint_addr = %s\n",
- paddress (gdbarch, SYMBOL_VALUE_ADDRESS (reg_symbol)));
+ paddress (gdbarch, addr));
+
+ if (ps_data->cached_code_address == addr)
+ return 1;
+
+ /* Delete the old breakpoint. */
+ if (ps_data->jit_breakpoint != NULL)
+ delete_breakpoint (ps_data->jit_breakpoint);
/* Put a breakpoint in the registration symbol. */
- create_jit_event_breakpoint (gdbarch, SYMBOL_VALUE_ADDRESS (reg_symbol));
+ ps_data->cached_code_address = addr;
+ ps_data->jit_breakpoint = create_jit_event_breakpoint (gdbarch, addr);
return 0;
}
gdb_reg = gdbarch_dwarf2_reg_to_regnum (frame_arch, regnum);
size = register_size (frame_arch, gdb_reg);
value = xmalloc (sizeof (struct gdb_reg_value) + size - 1);
- value->defined = frame_register_read (priv->this_frame, gdb_reg,
- value->value);
+ value->defined = deprecated_frame_register_read (priv->this_frame, gdb_reg,
+ value->value);
value->size = size;
value->free = reg_value_free_impl;
return value;
jit_frame_sniffer (const struct frame_unwind *self,
struct frame_info *this_frame, void **cache)
{
- struct jit_inferior_data *inf_data;
struct jit_unwind_private *priv_data;
struct gdb_unwind_callbacks callbacks;
struct gdb_reader_funcs *funcs;
- inf_data = get_jit_inferior_data ();
-
callbacks.reg_get = jit_unwind_reg_get_impl;
callbacks.reg_set = jit_unwind_reg_set_impl;
callbacks.target_read = jit_target_read_impl;
{
struct jit_descriptor descriptor;
struct jit_code_entry cur_entry;
- struct jit_inferior_data *inf_data;
+ struct jit_program_space_data *ps_data;
CORE_ADDR cur_entry_addr;
if (jit_debug)
jit_prepend_unwinder (gdbarch);
- inf_data = get_jit_inferior_data ();
- if (jit_breakpoint_re_set_internal (gdbarch, inf_data) != 0)
+ ps_data = get_jit_program_space_data ();
+ if (jit_breakpoint_re_set_internal (gdbarch, ps_data) != 0)
return;
/* Read the descriptor so we can check the version number and load
any already JITed functions. */
- if (!jit_read_descriptor (gdbarch, &descriptor, inf_data))
+ if (!jit_read_descriptor (gdbarch, &descriptor, ps_data))
return;
/* Check that the version number agrees with that we support. */
void
jit_inferior_created_hook (void)
{
- jit_inferior_init (target_gdbarch);
+ jit_inferior_init (target_gdbarch ());
}
/* Exported routine to call to re-set the jit breakpoints,
void
jit_breakpoint_re_set (void)
{
- jit_breakpoint_re_set_internal (target_gdbarch,
- get_jit_inferior_data ());
+ jit_breakpoint_re_set_internal (target_gdbarch (),
+ get_jit_program_space_data ());
}
/* This function cleans up any code entries left over when the
struct objfile *objf;
/* Read the descriptor from remote memory. */
- if (!jit_read_descriptor (gdbarch, &descriptor, get_jit_inferior_data ()))
+ if (!jit_read_descriptor (gdbarch, &descriptor,
+ get_jit_program_space_data ()))
return;
entry_addr = descriptor.relevant_entry;
}
}
-/* Called to free the data allocated to the jit_inferior_data slot. */
+/* Called to free the data allocated to the jit_program_space_data slot. */
static void
free_objfile_data (struct objfile *objfile, void *data)
if (objf_data->register_code != NULL)
{
- struct jit_inferior_data *inf_data = get_jit_inferior_data ();
+ struct jit_program_space_data *ps_data;
- if (inf_data->objfile == objfile)
- inf_data->objfile = NULL;
+ ps_data = program_space_data (objfile->pspace, jit_program_space_data);
+ if (ps_data != NULL && ps_data->objfile == objfile)
+ ps_data->objfile = NULL;
}
xfree (data);
&setdebuglist, &showdebuglist);
observer_attach_inferior_exit (jit_inferior_exit_hook);
+ observer_attach_breakpoint_deleted (jit_breakpoint_deleted);
+
jit_objfile_data =
register_objfile_data_with_cleanup (NULL, free_objfile_data);
- jit_inferior_data =
- register_inferior_data_with_cleanup (NULL, jit_inferior_data_cleanup);
+ jit_program_space_data =
+ register_program_space_data_with_cleanup (NULL,
+ jit_program_space_data_cleanup);
jit_gdbarch_data = gdbarch_data_register_pre_init (jit_gdbarch_data_init);
if (is_dl_available ())
{
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