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On Wed, Aug 5, 2009 at 04:00, Michael Snyder<msnyder@vmware.com> wrote:
> Eli Zaretskii wrote:
>>>
>>> From: Hui Zhu <teawater@gmail.com>
>>> Date: Tue, 4 Aug 2009 10:07:11 +0800
>>> Cc: msnyder@vmware.com, gdb-patches@sourceware.org
>>>
>>>> By the way, does it make sense to make the dump file portable, so that
>>>> another host that supports debugging the same target could then use
>>>> it?
>>>>
>>> Yes, the dump file is portable like core file.
>>
>> Well, maybe I'm missing something important, but isn't the dump file a
>> series of struct's defined as this:
>>
>> ? ?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;
>> ? ? ?} u;
>> ? ?};
>>
>> ? ?If so, then the dump file uses host's native pointers, so it is not
>> portable to a different host. ?Right?
>
> No. ?If you look at the code that dumps the file (and I had
> to add a bunch of printfs and stuff to figure it out), you'll
> see that the dump file looks like this:
>
> 4 byte magic number
> Series of the following:
> 1) 1 byte tag (record_end), or
> 2) 1 byte tag (record_rec) followed by
> ? 8 byte number (register id), followed by
> ? MAX_REGISTER_SIZE byte value (register value): or
> 3) 1 byte tag (record_mem) followed by
> ? 8 byte number (memory address) followed by
> ? 8 byte number (memory length) followed by
> ? N byte buffer (memory value).
>
> If you look for the #if (BYTE_ORDER == BIG_ENDIAN), this is
> where Teawater is making the byte orders host-independent.
>
> I was going to mention the ifdefs eventually. ? ;-)
>
Cool. It's very clear. :)
Thanks Michael.
I make a new version patch to follow the cvs head. And removed the ifdef.
Please help me review it.
Thanks,
Hui
2009-08-05 Hui Zhu <teawater@gmail.com>
Add dump and load command to process record and replay.
* record.c (completer.h, arch-utils.h, gdbcore.h, exec.h,
byteswap.h, netinet/in.h): Include files.
(RECORD_IS_REPLAY): Return true if record_core is true.
(RECORD_FILE_MAGIC): New macro.
(record_core_buf_entry): New struct.
(record_core, record_core_regbuf, record_core_start,
record_core_end, record_core_buf_list,
record_beneath_to_fetch_registers_ops,
record_beneath_to_fetch_registers,
record_beneath_to_store_registers_ops,
record_beneath_to_store_registers,
record_beneath_to_has_execution_ops,
record_beneath_to_has_execution,
record_beneath_to_prepare_to_store): New variables.
(record_list_release_first_insn): Change function
record_list_release_first to this name.
(record_arch_list_cleanups): New function.
(record_message_cleanups): Removed.
(record_message): Change to call record_arch_list_cleanups
and record_list_release_first_insn.
(record_exec_entry): New function.
(record_open): Add support for target core.
(record_close): Add support for target core.
(record_wait): Call function 'record_exec_entry'.
(record_kill): Add support for target core.
(record_registers_change): Call record_list_release_first_insn.
(record_fetch_registers): New function.
(record_prepare_to_store): New function.
(record_store_registers): Add support for target core.
(record_xfer_partial): Add support for target core.
(record_has_execution): New function.
(init_record_ops): Set record_ops.to_fetch_registers,
record_ops.to_prepare_to_store
and record_ops.to_has_execution.
(cmd_record_fd_cleanups): New function.
(cmd_record_dump): New function.
(cmd_record_load): New function.
(set_record_insn_max_num): Call record_list_release_first_insn.
(_initialize_record): Add commands "record dump"
and "record load".
---
record.c | 731 +++++++++++++++++++++++++++++++++++++++++++++++++++++++--------
1 file changed, 640 insertions(+), 91 deletions(-)
--- a/record.c
+++ b/record.c
@@ -23,14 +23,22 @@
#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 <byteswap.h>
#include <signal.h>
+#include <netinet/in.h>
#define DEFAULT_RECORD_INSN_MAX_NUM 200000
#define RECORD_IS_REPLAY \
- (record_list->next || execution_direction == EXEC_REVERSE)
+ (record_list->next || execution_direction == EXEC_REVERSE || record_core)
+
+#define RECORD_FILE_MAGIC htonl(0x20090726)
/* These are the core struct of record function.
@@ -78,9 +86,23 @@ struct record_entry
} u;
};
+struct record_core_buf_entry
+{
+ struct record_core_buf_entry *prev;
+ struct target_section *p;
+ bfd_byte *buf;
+};
+
/* This is the debug switch for process record. */
int record_debug = 0;
+/* Record with core target. */
+static int record_core = 0;
+static gdb_byte *record_core_regbuf;
+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;
+
/* These list is for execution log. */
static struct record_entry record_first;
static struct record_entry *record_list = &record_first;
@@ -103,6 +125,14 @@ static struct target_ops *record_beneath
static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t,
struct target_waitstatus *,
int);
+static struct target_ops *record_beneath_to_fetch_registers_ops;
+static void (*record_beneath_to_fetch_registers) (struct target_ops *,
+ struct regcache *,
+ int regno);
+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_store_registers_ops;
static void (*record_beneath_to_store_registers) (struct target_ops *,
struct regcache *,
@@ -119,6 +149,9 @@ static int (*record_beneath_to_insert_br
struct bp_target_info *);
static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *,
struct bp_target_info *);
+static struct target_ops *record_beneath_to_has_execution_ops;
+static int (*record_beneath_to_has_execution) (struct target_ops *ops);
+static void (*record_beneath_to_prepare_to_store) (struct regcache *regcache);
static void
record_list_release (struct record_entry *rec)
@@ -169,7 +202,7 @@ record_list_release_next (void)
}
static void
-record_list_release_first (void)
+record_list_release_first_insn (void)
{
struct record_entry *tmp = NULL;
enum record_type type;
@@ -340,30 +373,30 @@ record_check_insn_num (int set_terminal)
if (q)
record_stop_at_limit = 0;
else
- error (_("Process record: inferior program stopped."));
+ error (_("Process record: stoped 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);
-}
-
static int
record_message (void *args)
{
int ret;
struct regcache *regcache = args;
- 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;
@@ -386,7 +419,7 @@ record_message (void *args)
record_list = record_arch_list_tail;
if (record_insn_num == record_insn_max_num && record_insn_max_num)
- record_list_release_first ();
+ record_list_release_first_insn ();
else
record_insn_num++;
@@ -416,6 +449,91 @@ record_gdb_operation_disable_set (void)
return old_cleanups;
}
+static inline void
+record_exec_entry (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, entry->u.reg.val);
+ memcpy (entry->u.reg.val, reg, MAX_REGISTER_SIZE);
+ }
+ break;
+
+ case record_mem: /* mem */
+ {
+ if (!record_list->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),
+ record_list->u.mem.len);
+
+ if (target_read_memory (entry->u.mem.addr, mem, entry->u.mem.len))
+ {
+ if ((execution_direction == EXEC_REVERSE && !record_core)
+ || (execution_direction != EXEC_REVERSE && record_core))
+ {
+ record_list->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
+ error (_("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, entry->u.mem.val,
+ entry->u.mem.len))
+ {
+ if ((execution_direction == EXEC_REVERSE && !record_core)
+ || (execution_direction != EXEC_REVERSE &&
record_core))
+ {
+ record_list->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
+ error (_("Process record: error writing memory at "
+ "addr = %s len = %d."),
+ paddress (gdbarch, entry->u.mem.addr),
+ entry->u.mem.len);
+ }
+ }
+
+ memcpy (entry->u.mem.val, mem, entry->u.mem.len);
+ }
+ }
+ break;
+ }
+}
+
static void
record_open (char *name, int from_tty)
{
@@ -424,8 +542,13 @@ record_open (char *name, int from_tty)
if (record_debug)
fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n");
+ if (!strcmp (current_target.to_shortname, "core"))
+ record_core = 1;
+ else
+ record_core = 0;
+
/* check exec */
- if (!target_has_execution)
+ if (!target_has_execution && !record_core)
error (_("Process record: the program is not being run."));
if (non_stop)
error (_("Process record target can't debug inferior in non-stop mode "
@@ -454,6 +577,8 @@ record_open (char *name, int from_tty)
record_beneath_to_xfer_partial = NULL;
record_beneath_to_insert_breakpoint = NULL;
record_beneath_to_remove_breakpoint = NULL;
+ record_beneath_to_has_execution = NULL;
+ record_beneath_to_prepare_to_store = NULL;
/* Set the beneath function pointers. */
for (t = current_target.beneath; t != NULL; t = t->beneath)
@@ -468,6 +593,11 @@ record_open (char *name, int from_tty)
record_beneath_to_wait = t->to_wait;
record_beneath_to_wait_ops = t;
}
+ if (!record_beneath_to_fetch_registers)
+ {
+ record_beneath_to_fetch_registers = t->to_fetch_registers;
+ record_beneath_to_fetch_registers_ops = t;
+ }
if (!record_beneath_to_store_registers)
{
record_beneath_to_store_registers = t->to_store_registers;
@@ -482,19 +612,51 @@ record_open (char *name, int from_tty)
record_beneath_to_insert_breakpoint = t->to_insert_breakpoint;
if (!record_beneath_to_remove_breakpoint)
record_beneath_to_remove_breakpoint = t->to_remove_breakpoint;
+ if (!record_beneath_to_has_execution)
+ {
+ record_beneath_to_has_execution_ops = t;
+ record_beneath_to_has_execution = t->to_has_execution;
+ }
+ if (!record_beneath_to_prepare_to_store)
+ record_beneath_to_prepare_to_store = t->to_prepare_to_store;
}
- if (!record_beneath_to_resume)
+ if (!record_beneath_to_resume && !record_core)
error (_("Process record can't get to_resume."));
- if (!record_beneath_to_wait)
+ if (!record_beneath_to_wait && !record_core)
error (_("Process record can't get to_wait."));
- if (!record_beneath_to_store_registers)
+ if (!record_beneath_to_fetch_registers)
+ error (_("Process record can't get to_fetch_registers."));
+ if (!record_beneath_to_store_registers && !record_core)
error (_("Process record can't get to_store_registers."));
if (!record_beneath_to_xfer_partial)
error (_("Process record can't get to_xfer_partial."));
- if (!record_beneath_to_insert_breakpoint)
+ if (!record_beneath_to_insert_breakpoint && !record_core)
error (_("Process record can't get to_insert_breakpoint."));
- if (!record_beneath_to_remove_breakpoint)
+ if (!record_beneath_to_remove_breakpoint && !record_core)
error (_("Process record can't get to_remove_breakpoint."));
+ if (!record_beneath_to_has_execution && !record_core)
+ error (_("Process record can't get to_has_execution."));
+ if (!record_beneath_to_prepare_to_store && !record_core)
+ error (_("Process record can't get to_prepare_to_store."));
+
+ if (record_core)
+ {
+ /* Get record_core_regbuf. */
+ struct regcache *regcache = get_current_regcache ();
+ int regnum = gdbarch_num_regs (get_regcache_arch (regcache));
+ int i;
+
+ 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))
+ error (_("\"%s\": Can't find sections: %s"),
+ bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
+ }
push_target (&record_ops);
@@ -507,10 +669,26 @@ record_open (char *name, int from_tty)
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. */
+ xfree (record_core_regbuf);
+
+ /* 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;
+ }
}
static int record_resume_step = 0;
@@ -712,76 +890,9 @@ record_wait (struct target_ops *ops,
break;
}
- /* Set ptid, register and memory according to record_list. */
- if (record_list->type == 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 (record_list),
- record_list->u.reg.num);
- regcache_cooked_read (regcache, record_list->u.reg.num, reg);
- regcache_cooked_write (regcache, record_list->u.reg.num,
- record_list->u.reg.val);
- memcpy (record_list->u.reg.val, reg, MAX_REGISTER_SIZE);
- }
- else if (record_list->type == record_mem)
- {
- /* mem */
- /* Nothing to do if the entry is flagged not_accessible. */
- if (!record_list->u.mem.mem_entry_not_accessible)
- {
- gdb_byte *mem = alloca (record_list->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 (record_list),
- paddress (gdbarch,
- record_list->u.mem.addr),
- record_list->u.mem.len);
+ record_exec_entry (regcache, gdbarch, record_list);
- if (target_read_memory (record_list->u.mem.addr, mem,
- record_list->u.mem.len))
- {
- if (execution_direction != EXEC_REVERSE)
- error (_("Process record: error reading memory at "
- "addr = %s len = %d."),
- paddress (gdbarch, record_list->u.mem.addr),
- record_list->u.mem.len);
- else
- /* Read failed --
- flag entry as not_accessible. */
- record_list->u.mem.mem_entry_not_accessible = 1;
- }
- else
- {
- if (target_write_memory (record_list->u.mem.addr,
- record_list->u.mem.val,
- record_list->u.mem.len))
- {
- if (execution_direction != EXEC_REVERSE)
- error (_("Process record: error writing memory at "
- "addr = %s len = %d."),
- paddress (gdbarch, record_list->u.mem.addr),
- record_list->u.mem.len);
- else
- /* Write failed --
- flag entry as not_accessible. */
- record_list->u.mem.mem_entry_not_accessible = 1;
- }
- else
- {
- memcpy (record_list->u.mem.val, mem,
- record_list->u.mem.len);
- }
- }
- }
- }
- else
+ if (record_list->type == record_end)
{
if (record_debug > 1)
fprintf_unfiltered (gdb_stdlog,
@@ -901,7 +1012,9 @@ record_kill (struct target_ops *ops)
fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n");
unpush_target (&record_ops);
- target_kill ();
+
+ if (!record_core)
+ target_kill ();
}
/* Record registers change (by user or by GDB) to list as an instruction. */
@@ -945,15 +1058,58 @@ record_registers_change (struct regcache
record_list = record_arch_list_tail;
if (record_insn_num == record_insn_max_num && record_insn_max_num)
- record_list_release_first ();
+ record_list_release_first_insn ();
else
record_insn_num++;
}
static void
+record_fetch_registers (struct target_ops *ops, struct regcache *regcache,
+ int regno)
+{
+ if (record_core)
+ {
+ 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);
+ }
+ else
+ record_beneath_to_fetch_registers (record_beneath_to_store_registers_ops,
+ regcache, regno);
+}
+
+static void
+record_prepare_to_store (struct regcache *regcache)
+{
+ if (!record_core)
+ record_beneath_to_prepare_to_store (regcache);
+}
+
+static void
record_store_registers (struct target_ops *ops, struct regcache *regcache,
int regno)
{
+ if (record_core)
+ {
+ /* Debug with core. */
+ 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."));
+
+ return;
+ }
+
if (!record_gdb_operation_disable)
{
if (RECORD_IS_REPLAY)
@@ -1000,6 +1156,7 @@ record_store_registers (struct target_op
record_registers_change (regcache, regno);
}
+
record_beneath_to_store_registers (record_beneath_to_store_registers_ops,
regcache, regno);
}
@@ -1015,7 +1172,7 @@ record_xfer_partial (struct target_ops *
{
if (!record_gdb_operation_disable
&& (object == TARGET_OBJECT_MEMORY
- || object == TARGET_OBJECT_RAW_MEMORY) && writebuf)
+ || object == TARGET_OBJECT_RAW_MEMORY) && writebuf && !record_core)
{
if (RECORD_IS_REPLAY)
{
@@ -1059,11 +1216,91 @@ record_xfer_partial (struct target_ops *
record_list = record_arch_list_tail;
if (record_insn_num == record_insn_max_num && record_insn_max_num)
- record_list_release_first ();
+ record_list_release_first_insn ();
else
record_insn_num++;
}
+ if (record_core && object == TARGET_OBJECT_MEMORY)
+ {
+ /* Debug with core. */
+ if (record_gdb_operation_disable || !writebuf)
+ {
+ struct target_section *p;
+ for (p = record_core_start; p < record_core_end; p++)
+ {
+ if (offset >= p->addr)
+ {
+ struct record_core_buf_entry *entry;
+
+ if (offset >= p->endaddr)
+ continue;
+
+ if (offset + len > p->endaddr)
+ len = p->endaddr - 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 + 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 + offset, (size_t) len);
+ }
+
+ return len;
+ }
+ }
+
+ return 0;
+ }
+ else
+ error (_("You can't do that without a process to debug."));
+
+ return 0;
+ }
+
return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops,
object, annex, readbuf, writebuf,
offset, len);
@@ -1113,6 +1350,15 @@ record_can_execute_reverse (void)
return 1;
}
+int
+record_has_execution (struct target_ops *ops)
+{
+ if (record_core)
+ return 1;
+
+ return record_beneath_to_has_execution (ops);
+}
+
static void
init_record_ops (void)
{
@@ -1129,11 +1375,14 @@ init_record_ops (void)
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_fetch_registers = record_fetch_registers;
+ record_ops.to_prepare_to_store = record_prepare_to_store;
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_can_execute_reverse = record_can_execute_reverse;
+ record_ops.to_has_execution = record_has_execution;
record_ops.to_stratum = record_stratum;
record_ops.to_magic = OPS_MAGIC;
}
@@ -1154,6 +1403,294 @@ cmd_record_start (char *args, int from_t
execute_command ("target record", from_tty);
}
+static void
+cmd_record_fd_cleanups (void *recfdp)
+{
+ int recfd = *(int *) recfdp;
+ close (recfd);
+}
+
+static inline void
+record_read_dump (char *recfilename, int fildes, void *buf, size_t nbyte)
+{
+ if (read (fildes, buf, nbyte) != nbyte)
+ error (_("Failed to read dump of execution records in '%s'."),
+ recfilename);
+}
+
+static inline void
+record_write_dump (char *recfilename, int fildes, const void *buf,
+ size_t nbyte)
+{
+ if (write (fildes, buf, nbyte) != nbyte)
+ error (_("Failed to write dump of execution records to '%s'."),
+ recfilename);
+}
+
+/* Dump the execution log to a file. */
+
+static void
+cmd_record_dump (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;
+
+ if (current_target.to_stratum != record_stratum)
+ error (_("Process record is not started.\n"));
+
+ if (args && *args)
+ recfilename = args;
+ else
+ {
+ /* Default corefile name is "gdb_record.PID". */
+ sprintf (recfilename_buffer, "gdb_record.%d", PIDGET (inferior_ptid));
+ recfilename = recfilename_buffer;
+ }
+
+ /* Open the dump file. */
+ recfd = open (recfilename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
+ S_IRUSR | S_IWUSR);
+ if (recfd < 0)
+ error (_("Failed to open '%s' for dump execution records: %s"),
+ recfilename, strerror (errno));
+ old_cleanups = make_cleanup (cmd_record_fd_cleanups, &recfd);
+
+ /* 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 ();
+
+ /* Write the magic code. */
+ magic = RECORD_FILE_MAGIC;
+ record_write_dump (recfilename, recfd, &magic, 4);
+
+ /* 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_entry (regcache, gdbarch, record_list);
+
+ if (record_list->prev)
+ record_list = record_list->prev;
+ }
+
+ /* Dump the entries to recfd and forward execute to the end of
+ record list. */
+ while (1)
+ {
+ /* Dump entry. */
+ if (record_list != &record_first)
+ {
+ uint8_t tmpu8;
+ uint64_t tmpu64;
+
+ tmpu8 = record_list->type;
+ record_write_dump (recfilename, recfd, &tmpu8, 1);
+
+ switch (record_list->type)
+ {
+ case record_reg: /* reg */
+ tmpu64 = record_list->u.reg.num;
+ if (BYTE_ORDER == LITTLE_ENDIAN)
+ tmpu64 = bswap_64 (tmpu64);
+ record_write_dump (recfilename, recfd, &tmpu64, 8);
+
+ record_write_dump (recfilename, recfd, record_list->u.reg.val,
+ MAX_REGISTER_SIZE);
+ break;
+ case record_mem: /* mem */
+ if (!record_list->u.mem.mem_entry_not_accessible)
+ {
+ tmpu64 = record_list->u.mem.addr;
+ if (BYTE_ORDER == LITTLE_ENDIAN)
+ tmpu64 = bswap_64 (tmpu64);
+ record_write_dump (recfilename, recfd, &tmpu64, 8);
+
+ tmpu64 = record_list->u.mem.len;
+ if (BYTE_ORDER == LITTLE_ENDIAN)
+ tmpu64 = bswap_64 (tmpu64);
+ record_write_dump (recfilename, recfd, &tmpu64, 8);
+
+ record_write_dump (recfilename, recfd,
+ record_list->u.mem.val,
+ record_list->u.mem.len);
+ }
+ break;
+ }
+ }
+
+ /* Execute entry. */
+ record_exec_entry (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_entry (regcache, gdbarch, record_list);
+
+ if (record_list->prev)
+ record_list = record_list->prev;
+ }
+
+ do_cleanups (set_cleanups);
+ do_cleanups (old_cleanups);
+
+ /* Succeeded. */
+ fprintf_filtered (gdb_stdout, _("Saved dump of execution "
+ "records to `%s'.\n"),
+ recfilename);
+}
+
+/* Load the execution log from a file. */
+
+static void
+cmd_record_load (char *args, int from_tty)
+{
+ int recfd;
+ uint32_t magic;
+ struct cleanup *old_cleanups;
+ struct cleanup *old_cleanups2;
+ struct record_entry *rec;
+ int insn_number = 0;
+
+ if (current_target.to_stratum != record_stratum)
+ {
+ cmd_record_start (NULL, from_tty);
+ printf_unfiltered (_("Auto start process record.\n"));
+ }
+
+ if (!args || (args && !*args))
+ error (_("Argument for filename required.\n"));
+
+ /* Open the load file. */
+ recfd = open (args, O_RDONLY | O_BINARY);
+ if (recfd < 0)
+ error (_("Failed to open '%s' for loading execution records: %s"),
+ args, strerror (errno));
+ old_cleanups = make_cleanup (cmd_record_fd_cleanups, &recfd);
+
+ /* Check the magic code. */
+ record_read_dump (args, recfd, &magic, 4);
+ if (magic != RECORD_FILE_MAGIC)
+ error (_("'%s' is not a valid dump of execution records."), args);
+
+ /* Load the entries in recfd to the record_arch_list_head and
+ record_arch_list_tail. */
+ record_arch_list_head = NULL;
+ record_arch_list_tail = NULL;
+ old_cleanups2 = make_cleanup (record_arch_list_cleanups, 0);
+
+ while (1)
+ {
+ int ret;
+ uint8_t tmpu8;
+ uint64_t tmpu64;
+
+ ret = read (recfd, &tmpu8, 1);
+ if (ret < 0)
+ error (_("Failed to read dump of execution records in '%s'."), args);
+ if (ret == 0)
+ break;
+
+ switch (tmpu8)
+ {
+ case record_reg: /* reg */
+ rec = (struct record_entry *) xmalloc (sizeof (struct record_entry));
+ rec->u.reg.val = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE);
+ rec->prev = NULL;
+ rec->next = NULL;
+ rec->type = record_reg;
+ /* Get num. */
+ record_read_dump (args, recfd, &tmpu64, 8);
+ if (BYTE_ORDER == LITTLE_ENDIAN)
+ tmpu64 = bswap_64 (tmpu64);
+ rec->u.reg.num = tmpu64;
+ /* Get val. */
+ record_read_dump (args, recfd, rec->u.reg.val, MAX_REGISTER_SIZE);
+ record_arch_list_add (rec);
+ break;
+ case record_mem: /* mem */
+ rec = (struct record_entry *) xmalloc (sizeof (struct record_entry));
+ rec->prev = NULL;
+ rec->next = NULL;
+ rec->type = record_mem;
+ /* Get addr. */
+ record_read_dump (args, recfd, &tmpu64, 8);
+ if (BYTE_ORDER == LITTLE_ENDIAN)
+ tmpu64 = bswap_64 (tmpu64);
+ rec->u.mem.addr = tmpu64;
+ /* Get len. */
+ record_read_dump (args, recfd, &tmpu64, 8);
+ if (BYTE_ORDER == LITTLE_ENDIAN)
+ tmpu64 = bswap_64 (tmpu64);
+ rec->u.mem.len = tmpu64;
+ rec->u.mem.mem_entry_not_accessible = 0;
+ rec->u.mem.val = (gdb_byte *) xmalloc (rec->u.mem.len);
+ /* Get val. */
+ record_read_dump (args, recfd, rec->u.mem.val, rec->u.mem.len);
+ record_arch_list_add (rec);
+ break;
+
+ case record_end: /* end */
+ rec = (struct record_entry *) xmalloc (sizeof (struct record_entry));
+ rec->prev = NULL;
+ rec->next = NULL;
+ rec->type = record_end;
+ record_arch_list_add (rec);
+ insn_number ++;
+ break;
+
+ default:
+ error (_("Format of '%s' is not right."), args);
+ break;
+ }
+ }
+
+ discard_cleanups (old_cleanups2);
+
+ /* Add record_arch_list_head to the end of record list. */
+ for (rec = record_list; rec->next; rec = rec->next);
+ rec->next = record_arch_list_head;
+ record_arch_list_head->prev = rec;
+
+ /* Update record_insn_num and record_insn_max_num. */
+ record_insn_num += insn_number;
+ 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);
+ }
+
+ do_cleanups (old_cleanups);
+
+ /* Succeeded. */
+ fprintf_filtered (gdb_stdout, "Loaded recfile %s.\n", args);
+}
+
/* Truncate the record log from the present point
of replay until the end. */
@@ -1204,7 +1741,7 @@ set_record_insn_max_num (char *args, int
"the first ones?\n"));
while (record_insn_num > record_insn_max_num)
- record_list_release_first ();
+ record_list_release_first_insn ();
}
}
@@ -1244,6 +1781,8 @@ info_record_command (char *args, int fro
void
_initialize_record (void)
{
+ struct cmd_list_element *c;
+
/* Init record_first. */
record_first.prev = NULL;
record_first.next = NULL;
@@ -1277,6 +1816,16 @@ _initialize_record (void)
"info record ", 0, &infolist);
add_alias_cmd ("rec", "record", class_obscure, 1, &infolist);
+ c = add_cmd ("dump", class_obscure, cmd_record_dump,
+ _("Dump the execution records to a file.\n\
+Argument is optional filename. Default filename is
'gdb_record.<process_id>'."),
+ &record_cmdlist);
+ set_cmd_completer (c, filename_completer);
+ c = add_cmd ("load", class_obscure, cmd_record_load,
+ _("Load previously dumped execution records from \
+a file given as argument."),
+ &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."),
Attachment:
prec-dump.txt
Description: Text document
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