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2009-10-16 Hui Zhu <teawater@gmail.com>

Browse source 
Michael Snyder  <msnyder@msnyder-server.eng.vmware.com>

	* record.c (RECORD_FILE_MAGIC): New constant.
	(record_arch_list_cleanups): Renamed from record_message_cleanups.
	(bfdcore_read): New function.
	(netorder64): New function.
	(netorder32): New function.
	(netorder16): New function.
	(record_restore): New function.  Restore a saved record log.
	(bfdcore_write): New function.
	(cmd_record_restore): New function.
	(cmd_record_save): New function.  Save a record log to a file.
	(_initialize_record): Set up commands for save and restore.

2009-10-17  Michael Snyder  <msnyder@vmware.com>

	* gcore.h: New file.
	* gcore.c (create_gcore_bfd): New function.
	(write_gcore_file): New function.
	(call_target_sbrk): New function.  Abstracted from gcore_command.
	(gcore_command): Call call_target_sbrk.
This commit is contained in:
Michael Snyder 2009-10-22 19:36:06 +00:00
parent 27699eeaab
commit 0156b21832
4 changed files with 711 additions and 82 deletions
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23
gdb/ChangeLog
View file

@ -1,3 +1,26 @@
2009-10-16 Hui Zhu <teawater@gmail.com>
Michael Snyder <msnyder@msnyder-server.eng.vmware.com>
* record.c (RECORD_FILE_MAGIC): New constant.
(record_arch_list_cleanups): Renamed from record_message_cleanups.
(bfdcore_read): New function.
(netorder64): New function.
(netorder32): New function.
(netorder16): New function.
(record_restore): New function. Restore a saved record log.
(bfdcore_write): New function.
(cmd_record_restore): New function.
(cmd_record_save): New function. Save a record log to a file.
(_initialize_record): Set up commands for save and restore.
2009-10-17 Michael Snyder <msnyder@vmware.com>
* gcore.h: New file.
* gcore.c (create_gcore_bfd): New function.
(write_gcore_file): New function.
(call_target_sbrk): New function. Abstracted from gcore_command.
(gcore_command): Call call_target_sbrk.
2009-10-22 Hui Zhu <teawater@gmail.com>
Michael Snyder <msnyder@vmware.com>

177
gdb/gcore.c
View file

@ -25,10 +25,14 @@
#include "gdbcore.h"
#include "objfiles.h"
#include "symfile.h"
#include "arch-utils.h"
#include "completer.h"
#include "gcore.h"
#include "cli/cli-decode.h"
#include "gdb_assert.h"
#include <fcntl.h>
#include "regcache.h"
#include "regset.h"
/* The largest amount of memory to read from the target at once. We
must throttle it to limit the amount of memory used by GDB during
@ -40,45 +44,30 @@ static enum bfd_architecture default_gcore_arch (void);
static unsigned long default_gcore_mach (void);
static int gcore_memory_sections (bfd *);
/* Generate a core file from the inferior process. */
/* create_gcore_bfd -- helper for gcore_command (exported).
Open a new bfd core file for output, and return the handle. */
static void
gcore_command (char *args, int from_tty)
bfd *
create_gcore_bfd (char *filename)
{
struct cleanup *old_chain;
char *corefilename, corefilename_buffer[40];
asection *note_sec = NULL;
bfd *obfd;
void *note_data = NULL;
int note_size = 0;
/* No use generating a corefile without a target process. */
if (!target_has_execution)
noprocess ();
if (args && *args)
corefilename = args;
else
{
/* Default corefile name is "core.PID". */
sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid));
corefilename = corefilename_buffer;
}
if (info_verbose)
fprintf_filtered (gdb_stdout,
"Opening corefile '%s' for output.\n", corefilename);
/* Open the output file. */
obfd = bfd_openw (corefilename, default_gcore_target ());
bfd *obfd = bfd_openw (filename, default_gcore_target ());
if (!obfd)
error (_("Failed to open '%s' for output."), corefilename);
/* Need a cleanup that will close the file (FIXME: delete it?). */
old_chain = make_cleanup_bfd_close (obfd);
error (_("Failed to open '%s' for output."), filename);
bfd_set_format (obfd, bfd_core);
bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ());
return obfd;
}
/* write_gcore_file -- helper for gcore_command (exported).
Compose and write the corefile data to the core file. */
void
write_gcore_file (bfd *obfd)
{
void *note_data = NULL;
int note_size = 0;
asection *note_sec = NULL;
/* An external target method must build the notes section. */
note_data = target_make_corefile_notes (obfd, &note_size);
@ -107,8 +96,46 @@ gcore_command (char *args, int from_tty)
if (note_data != NULL && note_size != 0)
{
if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size))
warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ()));
warning (_("writing note section (%s)"),
bfd_errmsg (bfd_get_error ()));
}
}
/* gcore_command -- implements the 'gcore' command.
Generate a core file from the inferior process. */
static void
gcore_command (char *args, int from_tty)
{
struct cleanup *old_chain;
char *corefilename, corefilename_buffer[40];
bfd *obfd;
/* No use generating a corefile without a target process. */
if (!target_has_execution)
noprocess ();
if (args && *args)
corefilename = args;
else
{
/* Default corefile name is "core.PID". */
sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid));
corefilename = corefilename_buffer;
}
if (info_verbose)
fprintf_filtered (gdb_stdout,
"Opening corefile '%s' for output.\n", corefilename);
/* Open the output file. */
obfd = create_gcore_bfd (corefilename);
/* Need a cleanup that will close the file (FIXME: delete it?). */
old_chain = make_cleanup_bfd_close (obfd);
/* Call worker function. */
write_gcore_file (obfd);
/* Succeeded. */
fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename);
@ -212,6 +239,50 @@ derive_stack_segment (bfd_vma *bottom, bfd_vma *top)
return 1;
}
/* call_target_sbrk --
helper function for derive_heap_segment. */
static bfd_vma
call_target_sbrk (int sbrk_arg)
{
struct objfile *sbrk_objf;
struct gdbarch *gdbarch;
bfd_vma top_of_heap;
struct value *target_sbrk_arg;
struct value *sbrk_fn, *ret;
bfd_vma tmp;
if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL)
{
sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf);
if (sbrk_fn == NULL)
return (bfd_vma) 0;
}
else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL)
{
sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf);
if (sbrk_fn == NULL)
return (bfd_vma) 0;
}
else
return (bfd_vma) 0;
gdbarch = get_objfile_arch (sbrk_objf);
target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int,
sbrk_arg);
gdb_assert (target_sbrk_arg);
ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg);
if (ret == NULL)
return (bfd_vma) 0;
tmp = value_as_long (ret);
if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff)
return (bfd_vma) 0;
top_of_heap = tmp;
return top_of_heap;
}
/* Derive a reasonable heap segment for ABFD by looking at sbrk and
the static data sections. Store its limits in *BOTTOM and *TOP.
Return non-zero if successful. */
@ -219,12 +290,10 @@ derive_stack_segment (bfd_vma *bottom, bfd_vma *top)
static int
derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top)
{
struct objfile *sbrk_objf;
struct gdbarch *gdbarch;
bfd_vma top_of_data_memory = 0;
bfd_vma top_of_heap = 0;
bfd_size_type sec_size;
struct value *zero, *sbrk;
bfd_vma sec_vaddr;
asection *sec;
@ -259,30 +328,10 @@ derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top)
}
}
/* Now get the top-of-heap by calling sbrk in the inferior. */
if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL)
{
sbrk = find_function_in_inferior ("sbrk", &sbrk_objf);
if (sbrk == NULL)
return 0;
}
else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL)
{
sbrk = find_function_in_inferior ("_sbrk", &sbrk_objf);
if (sbrk == NULL)
return 0;
}
else
top_of_heap = call_target_sbrk (0);
if (top_of_heap == (bfd_vma) 0)
return 0;
gdbarch = get_objfile_arch (sbrk_objf);
zero = value_from_longest (builtin_type (gdbarch)->builtin_int, 0);
gdb_assert (zero);
sbrk = call_function_by_hand (sbrk, 1, &zero);
if (sbrk == NULL)
return 0;
top_of_heap = value_as_long (sbrk);
/* Return results. */
if (top_of_heap > top_of_data_memory)
{
@ -299,13 +348,15 @@ static void
make_output_phdrs (bfd *obfd, asection *osec, void *ignored)
{
int p_flags = 0;
int p_type;
int p_type = 0;
/* FIXME: these constants may only be applicable for ELF. */
if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0)
p_type = PT_LOAD;
else
else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0)
p_type = PT_NOTE;
else
p_type = PT_NULL;
p_flags |= PF_R; /* Segment is readable. */
if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY))

27
gdb/gcore.h Normal file
View file

@ -0,0 +1,27 @@
/* Support for reading/writing gcore files.
Copyright (C) 2009, Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (GCORE_H)
#define GCORE_H 1
extern bfd *create_gcore_bfd (char *filename);
extern void write_gcore_file (bfd *obfd);
extern bfd *load_corefile (char *filename, int from_tty);
#endif /* GCORE_H */

566
gdb/record.c
View file

@ -23,10 +23,15 @@
#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 <byteswap.h>
#include <signal.h>
/* This module implements "target record", also known as "process
@ -54,6 +59,8 @@
#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
@ -545,24 +552,24 @@ record_check_insn_num (int set_terminal)
if (q)
record_stop_at_limit = 0;
else
error (_("Process record: inferior program stopped."));
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 void
record_message_cleanups (void *ignore)
{
record_list_release (record_arch_list_tail);
}
struct record_message_args {
struct regcache *regcache;
enum target_signal signal;
@ -574,7 +581,7 @@ record_message (void *args)
int ret;
struct record_message_args *myargs = args;
struct gdbarch *gdbarch = get_regcache_arch (myargs->regcache);
struct cleanup *old_cleanups = make_cleanup (record_message_cleanups, 0);
struct cleanup *old_cleanups = make_cleanup (record_arch_list_cleanups, 0);
record_arch_list_head = NULL;
record_arch_list_tail = NULL;
@ -714,8 +721,8 @@ record_exec_insn (struct regcache *regcache, struct gdbarch *gdbarch,
{
entry->u.mem.mem_entry_not_accessible = 1;
if (record_debug)
warning (_("Process record: error reading memory at "
"addr = %s len = %d."),
warning ("Process record: error reading memory at "
"addr = %s len = %d.",
paddress (gdbarch, entry->u.mem.addr),
entry->u.mem.len);
}
@ -727,8 +734,8 @@ record_exec_insn (struct regcache *regcache, struct gdbarch *gdbarch,
{
entry->u.mem.mem_entry_not_accessible = 1;
if (record_debug)
warning (_("Process record: error writing memory at "
"addr = %s len = %d."),
warning ("Process record: error writing memory at "
"addr = %s len = %d.",
paddress (gdbarch, entry->u.mem.addr),
entry->u.mem.len);
}
@ -765,6 +772,8 @@ static int (*tmp_to_insert_breakpoint) (struct gdbarch *,
static int (*tmp_to_remove_breakpoint) (struct gdbarch *,
struct bp_target_info *);
static void record_restore (void);
/* Open the process record target. */
static void
@ -791,6 +800,7 @@ record_core_open_1 (char *name, int from_tty)
}
push_target (&record_core_ops);
record_restore ();
}
/* "to_open" target method for 'live' processes. */
@ -1438,8 +1448,8 @@ record_xfer_partial (struct target_ops *ops, enum target_object object,
record_list_release (record_arch_list_tail);
if (record_debug)
fprintf_unfiltered (gdb_stdlog,
_("Process record: failed to record "
"execution log."));
"Process record: failed to record "
"execution log.");
return -1;
}
if (record_arch_list_add_end ())
@ -1447,8 +1457,8 @@ record_xfer_partial (struct target_ops *ops, enum target_object object,
record_list_release (record_arch_list_tail);
if (record_debug)
fprintf_unfiltered (gdb_stdlog,
_("Process record: failed to record "
"execution log."));
"Process record: failed to record "
"execution log.");
return -1;
}
record_list->next = record_arch_list_head;
@ -1885,9 +1895,513 @@ info_record_command (char *args, int from_tty)
record_insn_max_num);
}
/* 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)
{
int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len);
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 ()));
}
static inline uint64_t
netorder64 (uint64_t fromfile)
{
return (BYTE_ORDER == LITTLE_ENDIAN)
? bswap_64 (fromfile)
: fromfile;
}
static inline uint32_t
netorder32 (uint32_t fromfile)
{
return (BYTE_ORDER == LITTLE_ENDIAN)
? bswap_32 (fromfile)
: fromfile;
}
static inline uint16_t
netorder16 (uint16_t fromfile)
{
return (BYTE_ORDER == LITTLE_ENDIAN)
? bswap_16 (fromfile)
: fromfile;
}
/* Restore the execution log from a core_bfd file. */
static void
record_restore (void)
{
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)
printf_filtered ("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)
printf_filtered ("Find precord section %s.\n",
osec ? "succeeded" : "failed");
if (!osec)
return;
if (record_debug)
printf_filtered ("%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)
printf_filtered ("\
Reading 4-byte magic cookie RECORD_FILE_MAGIC (0x%08x)\n",
netorder32 (magic));
/* 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)
{
int ret;
uint8_t tmpu8;
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, &tmpu8, sizeof (tmpu8), &bfd_offset);
switch (tmpu8)
{
case record_reg: /* reg */
/* Get register number to regnum. */
bfdcore_read (core_bfd, osec, &regnum,
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)
printf_filtered ("\
Reading register %d (1 plus %d plus %d bytes)\n",
rec->u.reg.num,
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)
printf_filtered ("\
Reading memory %s (1 plus %d plus %d plus %d bytes)\n",
paddress (get_current_arch (),
rec->u.mem.addr),
sizeof (addr),
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)
printf_filtered ("\
Reading record_end (1 + %d + %d bytes), offset == %s\n",
sizeof (signal),
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);
}
discard_cleanups (old_cleanups);
/* 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;
/* 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);
}
/* Succeeded. */
printf_filtered (_("Restored records from core file %s.\n"),
bfd_get_filename (core_bfd));
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
}
/* bfdcore_write -- write bytes into a core file section. */
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);
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 ()));
}
/* Restore the execution log from a file. We use a modified elf
corefile format, with an extra section for our data. */
static void
cmd_record_restore (char *args, int from_tty)
{
core_file_command (args, from_tty);
record_open (args, from_tty);
}
static void
record_save_cleanups (void *data)
{
bfd *obfd = data;
char *pathname = xstrdup (bfd_get_filename (obfd));
bfd_close (obfd);
unlink (pathname);
xfree (pathname);
}
/* Save the execution log to a file. We use a modified elf corefile
format, with an extra section for our data. */
static void
cmd_record_save (char *args, int from_tty)
{
char *recfilename, recfilename_buffer[40];
int recfd;
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)
printf_filtered ("Saving execution log to core file '%s'\n", recfilename);
/* Open the output file. */
obfd = create_gcore_bfd (recfilename);
old_cleanups = make_cleanup (record_save_cleanups, obfd);
/* Save the current record entry to "cur_record_list". */
cur_record_list = record_list;
/* Get the values of regcache and gdbarch. */
regcache = get_current_regcache ();
gdbarch = get_regcache_arch (regcache);
/* Disable the GDB operation record. */
set_cleanups = record_gdb_operation_disable_set ();
/* Reverse execute to the begin of record list. */
while (1)
{
/* Check for beginning and end of log. */
if (record_list == &record_first)
break;
record_exec_insn (regcache, gdbarch, record_list);
if (record_list->prev)
record_list = record_list->prev;
}
/* 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)
printf_filtered ("\
Writing 4-byte magic cookie RECORD_FILE_MAGIC (0x%08x)\n",
magic);
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)
printf_filtered ("\
Writing register %d (1 plus %d plus %d bytes)\n",
record_list->u.reg.num,
sizeof (regnum),
record_list->u.reg.len);
/* Write regnum. */
regnum = netorder32 (record_list->u.reg.num);
bfdcore_write (obfd, osec, &regnum,
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)
printf_filtered ("\
Writing memory %s (1 plus %d plus %d plus %d bytes)\n",
paddress (gdbarch,
record_list->u.mem.addr),
sizeof (addr),
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)
printf_filtered ("\
Writing record_end (1 + %d + %d bytes)\n",
sizeof (signal),
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;
}
/* Reverse execute to cur_record_list. */
while (1)
{
/* Check for beginning and end of log. */
if (record_list == cur_record_list)
break;
record_exec_insn (regcache, gdbarch, record_list);
if (record_list->prev)
record_list = record_list->prev;
}
do_cleanups (set_cleanups);
bfd_close (obfd);
discard_cleanups (old_cleanups);
/* Succeeded. */
printf_filtered (_("Saved core file %s with execution log.\n"),
recfilename);
}
void
_initialize_record (void)
{
struct cmd_list_element *c;
/* Init record_first. */
record_first.prev = NULL;
record_first.next = NULL;
@ -1906,9 +2420,11 @@ _initialize_record (void)
NULL, show_record_debug, &setdebuglist,
&showdebuglist);
add_prefix_cmd ("record", class_obscure, cmd_record_start,
_("Abbreviated form of \"target record\" command."),
&record_cmdlist, "record ", 0, &cmdlist);
c = add_prefix_cmd ("record", class_obscure, cmd_record_start,
_("Abbreviated form of \"target record\" command."),
&record_cmdlist, "record ", 0, &cmdlist);
set_cmd_completer (c, filename_completer);
add_com_alias ("rec", "record", class_obscure, 1);
add_prefix_cmd ("record", class_support, set_record_command,
_("Set record options"), &set_record_cmdlist,
@ -1923,6 +2439,18 @@ _initialize_record (void)
"info record ", 0, &infolist);
add_alias_cmd ("rec", "record", class_obscure, 1, &infolist);
c = add_cmd ("save", class_obscure, cmd_record_save,
_("Save the execution log to a file.\n\
Argument is optional filename.\n\
Default filename is 'gdb_record.<process_id>'."),
&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."),