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gdb/gdb-bz592031-siginfo-lost-3...

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http://sourceware.org/ml/gdb-patches/2010-09/msg00438.html
http://sourceware.org/ml/gdb-cvs/2010-09/msg00156.html
### src/gdb/ChangeLog 2010/09/24 16:11:44 1.12203
### src/gdb/ChangeLog 2010/09/24 18:35:20 1.12204
## -1,3 +1,16 @@
+2010-09-24 Jan Kratochvil <jan.kratochvil@redhat.com>
+
+ 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.
+
2010-09-24 Tom Tromey <tromey@redhat.com>
* dwarf2read.c (dw2_expand_symtabs_matching): Add missing
--- src/gdb/infrun.c 2010/09/06 14:22:07 1.450
+++ src/gdb/infrun.c 2010/09/24 18:35:27 1.451
@@ -6037,18 +6037,57 @@
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 @@
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);
}
### src/gdb/testsuite/ChangeLog 2010/09/22 20:08:04 1.2456
### src/gdb/testsuite/ChangeLog 2010/09/24 18:35:28 1.2457
## -1,3 +1,9 @@
+2010-09-24 Jan Kratochvil <jan.kratochvil@redhat.com>
+
+ Fix lost siginfo_t for inferior calls.
+ * gdb.base/siginfo-infcall.exp: New file.
+ * gdb.base/siginfo-infcall.c: New file.
+
2010-09-22 Joel Brobecker <brobecker@adacore.com>
* gdb.dwarf2/dw2-const.S: Minor (space) reformatting.
--- src/gdb/testsuite/gdb.base/siginfo-infcall.c
+++ src/gdb/testsuite/gdb.base/siginfo-infcall.c 2010-09-25 13:25:25.007169000 +0000
@@ -0,0 +1,79 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2010 Free Software Foundation, Inc.
+
+ 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/>. */
+
+#include <signal.h>
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifndef SA_SIGINFO
+# error "SA_SIGINFO is required for this test"
+#endif
+
+static int
+callme (void)
+{
+ return 42;
+}
+
+static int
+pass (void)
+{
+ return 1;
+}
+
+static int
+fail (void)
+{
+ return 1;
+}
+
+static void
+handler (int sig, siginfo_t *siginfo, void *context)
+{
+ assert (sig == SIGUSR1);
+ assert (siginfo->si_signo == SIGUSR1);
+ if (siginfo->si_pid == getpid ())
+ pass ();
+ else
+ fail ();
+}
+
+int
+main (void)
+{
+ struct sigaction sa;
+ int i;
+
+ callme ();
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sa_sigaction = handler;
+ sa.sa_flags = SA_SIGINFO;
+
+ i = sigemptyset (&sa.sa_mask);
+ assert (i == 0);
+
+ i = sigaction (SIGUSR1, &sa, NULL);
+ assert (i == 0);
+
+ i = raise (SIGUSR1);
+ assert (i == 0);
+
+ sleep (600);
+ return 0;
+}
--- src/gdb/testsuite/gdb.base/siginfo-infcall.exp
+++ src/gdb/testsuite/gdb.base/siginfo-infcall.exp 2010-09-25 13:25:25.357724000 +0000
@@ -0,0 +1,47 @@
+# Copyright 2010 Free Software Foundation, Inc.
+
+# 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 [target_info exists gdb,nosignals] {
+ verbose "Skipping siginfo-infcall.exp because of nosignals."
+ continue
+}
+
+set testfile siginfo-infcall
+set srcfile ${testfile}.c
+set executable ${testfile}
+if { [prepare_for_testing ${testfile}.exp $executable] } {
+ return -1
+}
+
+if ![runto_main] {
+ return -1
+}
+
+gdb_breakpoint "pass"
+gdb_breakpoint "fail"
+
+gdb_test "continue" "Program received signal SIGUSR1, .*" "continue to SIGUSR1"
+
+gdb_test "p callme ()" " = 42"
+
+set test "continue to the handler"
+gdb_test_multiple "continue" $test {
+ -re "Breakpoint \[0-9\]+,\[^\r\n\]* pass .*\r\n$gdb_prompt $" {
+ pass $test
+ }
+ -re "Breakpoint \[0-9\]+,\[^\r\n\]* fail .*\r\n$gdb_prompt $" {
+ fail $test
+ }
+}
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