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Fix lost siginfo_t for inferior calls.
	* infrun.c
	(struct inferior_thread_state) <siginfo_gdbarch, siginfo_data>: New.
	(save_inferior_thread_state): New variables regcache, gdbarch and
	siginfo_data.  Initialize SIGINFO_DATA if gdbarch_get_siginfo_type_p.
	Move INF_STATE allocation later, pre-clear it.  Initialize REGISTERS
	using REGCACHE.
	(restore_inferior_thread_state): New variables regcache and gdbarch.
	Restore SIGINFO_DATA for matching GDBARCH.  Restore REGISTERS using
	REGCACHE.  Free also SIGINFO_DATA.

gdb/testsuite/
	Fix lost siginfo_t for inferior calls.
	* gdb.base/siginfo-infcall.exp: New file.
	* gdb.base/siginfo-infcall.c: New file.
This commit is contained in:
Jan Kratochvil
2010-09-24 18:35:28 +00:00
parent 4b5246aacb
commit 1736ad1102
5 changed files with 200 additions and 3 deletions
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58
gdb/infrun.c
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@ -6037,18 +6037,57 @@ struct inferior_thread_state
enum target_signal stop_signal;
CORE_ADDR stop_pc;
struct regcache *registers;
/* Format of SIGINFO or NULL if it is not present. */
struct gdbarch *siginfo_gdbarch;
/* The inferior format depends on SIGINFO_GDBARCH and it has a length of
TYPE_LENGTH (gdbarch_get_siginfo_type ()). For different gdbarch the
content would be invalid. */
gdb_byte *siginfo_data;
};
struct inferior_thread_state *
save_inferior_thread_state (void)
{
struct inferior_thread_state *inf_state = XMALLOC (struct inferior_thread_state);
struct inferior_thread_state *inf_state;
struct thread_info *tp = inferior_thread ();
struct regcache *regcache = get_current_regcache ();
struct gdbarch *gdbarch = get_regcache_arch (regcache);
gdb_byte *siginfo_data = NULL;
if (gdbarch_get_siginfo_type_p (gdbarch))
{
struct type *type = gdbarch_get_siginfo_type (gdbarch);
size_t len = TYPE_LENGTH (type);
struct cleanup *back_to;
siginfo_data = xmalloc (len);
back_to = make_cleanup (xfree, siginfo_data);
if (target_read (&current_target, TARGET_OBJECT_SIGNAL_INFO, NULL,
siginfo_data, 0, len) == len)
discard_cleanups (back_to);
else
{
/* Errors ignored. */
do_cleanups (back_to);
siginfo_data = NULL;
}
}
inf_state = XZALLOC (struct inferior_thread_state);
if (siginfo_data)
{
inf_state->siginfo_gdbarch = gdbarch;
inf_state->siginfo_data = siginfo_data;
}
inf_state->stop_signal = tp->stop_signal;
inf_state->stop_pc = stop_pc;
inf_state->registers = regcache_dup (get_current_regcache ());
inf_state->registers = regcache_dup (regcache);
return inf_state;
}
@ -6059,16 +6098,29 @@ void
restore_inferior_thread_state (struct inferior_thread_state *inf_state)
{
struct thread_info *tp = inferior_thread ();
struct regcache *regcache = get_current_regcache ();
struct gdbarch *gdbarch = get_regcache_arch (regcache);
tp->stop_signal = inf_state->stop_signal;
stop_pc = inf_state->stop_pc;
if (inf_state->siginfo_gdbarch == gdbarch)
{
struct type *type = gdbarch_get_siginfo_type (gdbarch);
size_t len = TYPE_LENGTH (type);
/* Errors ignored. */
target_write (&current_target, TARGET_OBJECT_SIGNAL_INFO, NULL,
inf_state->siginfo_data, 0, len);
}
/* The inferior can be gone if the user types "print exit(0)"
(and perhaps other times). */
if (target_has_execution)
/* NB: The register write goes through to the target. */
regcache_cpy (get_current_regcache (), inf_state->registers);
regcache_cpy (regcache, inf_state->registers);
regcache_xfree (inf_state->registers);
xfree (inf_state->siginfo_data);
xfree (inf_state);
}