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2009-10-20 Hui Zhu <teawater@gmail.com>

Browse Source 
Michael Snyder  <msnyder@vmware.com>

	* record.c (record_exec_insn): New function.  Emulate one
	instruction, forward or backward.  Abstracted from record_wait.
	(record_wait) Call record_exec_insn.
This commit is contained in:
Michael Snyder 2009-10-20 22:56:04 +00:00
parent 4b06377fcc
commit 90ca047913
2 changed files with 83 additions and 70 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2009-10-20 Hui Zhu <teawater@gmail.com>
Michael Snyder <msnyder@vmware.com>
* record.c (record_exec_insn): New function. Emulate one
instruction, forward or backward. Abstracted from record_wait.
(record_wait) Call record_exec_insn.
2009-10-20 Michael Snyder <msnyder@msnyder-server.eng.vmware.com>
* infrun.c (handle_inferior_event): Add pspace field to sal

146
gdb/record.c
View File

@ -585,6 +585,80 @@ record_gdb_operation_disable_set (void)
return old_cleanups;
}
/* 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);
}
}
}
break;
}
}
static void
record_open (char *name, int from_tty)
{
@ -881,77 +955,9 @@ 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_get_loc (record_list));
memcpy (record_get_loc (record_list), reg,
record_list->u.reg.len);
}
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_insn (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_get_loc (record_list),
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_get_loc (record_list), mem,
record_list->u.mem.len);
}
}
}
}
else
if (record_list->type == record_end)
{
if (record_debug > 1)
fprintf_unfiltered (gdb_stdlog,