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* linux-tdep.c (linux_make_siginfo_note): New function.
	(linux_make_corefile_notes): Use it.
	* corelow.c (get_core_siginfo): New function.
	(core_xfer_partial) <TARGET_OBJECT_SIGNAL_INFO>: New case.
gdb/testsuite
	* gdb.base/siginfo-obj.exp: Create core file.  Test siginfo from
	core files, if possible.
	* gdb.base/siginfo-thread.c: New file
	* gdb.base/siginfo-thread.exp: New file
bfd
	* elf.c (elfcore_grok_note) <NT_SIGINFO>: New case; make
	pseudosection.
This commit is contained in:
Tom Tromey
2012-11-08 21:16:43 +00:00
parent ea9f10bb87
commit 9015683b1c
9 changed files with 347 additions and 0 deletions
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56
gdb/linux-tdep.c
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@@ -765,6 +765,44 @@ linux_collect_thread_registers (const struct regcache *regcache,
return note_data;
}
/* Fetch the siginfo data for the current thread, if it exists. If
there is no data, or we could not read it, return NULL. Otherwise,
return a newly malloc'd buffer holding the data and fill in *SIZE
with the size of the data. The caller is responsible for freeing
the data. */
static gdb_byte *
linux_get_siginfo_data (struct gdbarch *gdbarch, LONGEST *size)
{
struct type *siginfo_type;
gdb_byte *buf;
LONGEST bytes_read;
struct cleanup *cleanups;
if (!gdbarch_get_siginfo_type_p (gdbarch))
return NULL;
siginfo_type = gdbarch_get_siginfo_type (gdbarch);
buf = xmalloc (TYPE_LENGTH (siginfo_type));
cleanups = make_cleanup (xfree, buf);
bytes_read = target_read (&current_target, TARGET_OBJECT_SIGNAL_INFO, NULL,
buf, 0, TYPE_LENGTH (siginfo_type));
if (bytes_read == TYPE_LENGTH (siginfo_type))
{
discard_cleanups (cleanups);
*size = bytes_read;
}
else
{
do_cleanups (cleanups);
buf = NULL;
}
return buf;
}
struct linux_corefile_thread_data
{
struct gdbarch *gdbarch;
@@ -789,17 +827,35 @@ linux_corefile_thread_callback (struct thread_info *info, void *data)
{
struct cleanup *old_chain;
struct regcache *regcache;
gdb_byte *siginfo_data;
LONGEST siginfo_size;
regcache = get_thread_arch_regcache (info->ptid, args->gdbarch);
old_chain = save_inferior_ptid ();
inferior_ptid = info->ptid;
target_fetch_registers (regcache, -1);
siginfo_data = linux_get_siginfo_data (args->gdbarch, &siginfo_size);
do_cleanups (old_chain);
old_chain = make_cleanup (xfree, siginfo_data);
args->note_data = args->collect (regcache, info->ptid, args->obfd,
args->note_data, args->note_size,
args->stop_signal);
args->num_notes++;
if (siginfo_data != NULL)
{
args->note_data = elfcore_write_note (args->obfd,
args->note_data,
args->note_size,
"CORE", NT_SIGINFO,
siginfo_data, siginfo_size);
args->num_notes++;
}
do_cleanups (old_chain);
}
return !args->note_data;