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gdb/gdb-6.8-attach-signalled-detach-stopped.patch

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Index: gdb-6.8.50.20081128/gdb/linux-nat.c
===================================================================
--- gdb-6.8.50.20081128.orig/gdb/linux-nat.c 2008-12-06 21:48:18.000000000 +0100
+++ gdb-6.8.50.20081128/gdb/linux-nat.c 2008-12-06 22:00:42.000000000 +0100
@@ -199,6 +199,9 @@ blocked. */
static struct target_ops *linux_ops;
static struct target_ops linux_ops_saved;
+/* PID of the inferior stopped by SIGSTOP before attaching (or zero). */
+static pid_t pid_was_stopped;
+
/* The method to call, if any, when a new thread is attached. */
static void (*linux_nat_new_thread) (ptid_t);
@@ -871,7 +874,14 @@ linux_child_follow_fork (struct target_o
fork_save_infrun_state (fp, 0);
}
else
- target_detach (NULL, 0);
+ {
+ /* We should check PID_WAS_STOPPED and detach it stopped accordingly.
+ In this point of code it cannot be 1 as we would not get FORK
+ executed without CONTINUE first which resets PID_WAS_STOPPED.
+ We would have to first TARGET_STOP and WAITPID it as with running
+ inferior PTRACE_DETACH, SIGSTOP will ignore the signal. */
+ target_detach (NULL, 0);
+ }
inferior_ptid = ptid_build (child_pid, child_pid, 0);
add_inferior (child_pid);
@@ -1203,6 +1213,7 @@ linux_nat_post_attach_wait (ptid_t ptid,
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
"LNPAW: Attaching to a stopped process\n");
+ pid_was_stopped = GET_PID (ptid);
/* The process is definitely stopped. It is in a job control
stop, unless the kernel predates the TASK_STOPPED /
@@ -1535,6 +1546,9 @@ GPT: lwp %s had signal %s, but it is in
*status = lp->status;
}
+ if (*status == 0 && GET_PID (lp->ptid) == pid_was_stopped)
+ *status = W_STOPCODE (SIGSTOP);
+
return 0;
}
@@ -1631,6 +1645,8 @@ linux_nat_detach (struct target_ops *ops
inferior_ptid = pid_to_ptid (pid);
linux_ops->to_detach (ops, args, from_tty);
+ pid_was_stopped = 0;
+
if (target_can_async_p ())
drain_queued_events (pid);
}
@@ -1787,6 +1803,14 @@ linux_nat_resume (ptid_t ptid, int step_
resume_callback. */
lp->stopped = 0;
+ /* At this point, we are going to resume the inferior and if we
+ have attached to a stopped process, we no longer should leave
+ it as stopped if the user detaches. PTID variable has PID set to LWP
+ while we need to check the real PID here. */
+
+ if (!step && lp && pid_was_stopped == GET_PID (lp->ptid))
+ pid_was_stopped = 0;
+
if (resume_all)
iterate_over_lwps (resume_callback, NULL);
@@ -3281,6 +3305,8 @@ linux_nat_mourn_inferior (struct target_
there are other viable forks to debug. Delete the exiting
one and context-switch to the first available. */
linux_fork_mourn_inferior ();
+
+ pid_was_stopped = 0;
}
static LONGEST
Index: gdb-6.8.50.20081128/gdb/testsuite/gdb.threads/attach-stopped.c
===================================================================
--- gdb-6.8.50.20081128.orig/gdb/testsuite/gdb.threads/attach-stopped.c 2008-05-01 20:50:14.000000000 +0200
+++ gdb-6.8.50.20081128/gdb/testsuite/gdb.threads/attach-stopped.c 2008-12-06 21:57:23.000000000 +0100
@@ -1,19 +1,20 @@
/* This testcase is part of GDB, the GNU debugger.
- Copyright 2008 Free Software Foundation, Inc.
+ Copyright 2005-2007 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
+ the Free Software Foundation; either version 2 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/>. */
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This program is intended to be started outside of gdb, then
manually stopped via a signal. */
Index: gdb-6.8.50.20081128/gdb/testsuite/gdb.threads/attach-stopped.exp
===================================================================
--- gdb-6.8.50.20081128.orig/gdb/testsuite/gdb.threads/attach-stopped.exp 2008-05-01 20:50:14.000000000 +0200
+++ gdb-6.8.50.20081128/gdb/testsuite/gdb.threads/attach-stopped.exp 2008-12-06 21:57:23.000000000 +0100
@@ -1,26 +1,33 @@
-# Copyright 2008
-# Free Software Foundation, Inc.
+# Copyright 2005-2007
# 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
+# the Free Software Foundation; either version 2 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/>.
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# This test was created by modifying attach.exp.
# This file was created by Jeff Johnston <jjohnstn@redhat.com>.
# This file was updated by Jan Kratochvil <jan.kratochvil@redhat.com>.
+if $tracelevel then {
+ strace $tracelevel
+}
+
+set prms_id 0
+set bug_id 0
+
# This test only works on Linux
-if { ![isnative] || [is_remote host] || ![istarget *-linux*] } {
- continue
+if { ![istarget "*-*-linux-gnu*"] } {
+ return 0
}
set testfile "attach-stopped"
@@ -63,7 +70,65 @@ proc corefunc { threadtype } {
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
- # Verify that we can attach to the stopped process.
+ # Verify that we can attach to the process by first giving its
+ # executable name via the file command, and using attach with the
+ # process ID.
+
+ set test "$threadtype: set file, before attach1 to stopped process"
+ gdb_test_multiple "file $binfile" "$test" {
+ -re "Load new symbol table from.*y or n. $" {
+ gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
+ "$test (re-read)"
+ }
+ -re "Reading symbols from $escapedbinfile\.\.\.*done.*$gdb_prompt $" {
+ pass "$test"
+ }
+ }
+
+ set test "$threadtype: attach1 to stopped, after setting file"
+ gdb_test_multiple "attach $testpid" "$test" {
+ -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*$gdb_prompt $" {
+ pass "$test"
+ }
+ }
+
+ # ".*sleep.*clone.*" would fail on s390x as bt stops at START_THREAD there.
+ if {[string equal $threadtype threaded]} {
+ gdb_test "thread apply all bt" ".*sleep.*start_thread.*" "$threadtype: attach1 to stopped bt"
+ } else {
+ gdb_test "bt" ".*sleep.*main.*" "$threadtype: attach1 to stopped bt"
+ }
+
+ # Exit and detach the process.
+
+ gdb_exit
+
+ # Avoid some race:
+ sleep 2
+
+ if [catch {open /proc/${testpid}/status r} fileid] {
+ set line2 "NOTFOUND"
+ } else {
+ gets $fileid line1;
+ gets $fileid line2;
+ close $fileid;
+ }
+
+ set test "$threadtype: attach1, exit leaves process stopped"
+ if {[string match "*(stopped)*" $line2]} {
+ pass $test
+ } else {
+ fail $test
+ }
+
+ # At this point, the process should still be stopped
+
+ gdb_start
+ gdb_reinitialize_dir $srcdir/$subdir
+ gdb_load ${binfile}
+
+ # Verify that we can attach to the process just by giving the
+ # process ID.
set test "$threadtype: attach2 to stopped, after setting file"
gdb_test_multiple "attach $testpid" "$test" {
Index: gdb-6.8.50.20081128/gdb/testsuite/gdb.threads/attachstop-mt.c
===================================================================
--- gdb-6.8.50.20081128.orig/gdb/testsuite/gdb.threads/attachstop-mt.c 2008-05-01 20:50:14.000000000 +0200
+++ gdb-6.8.50.20081128/gdb/testsuite/gdb.threads/attachstop-mt.c 2008-12-06 21:57:23.000000000 +0100
@@ -1,19 +1,20 @@
/* This testcase is part of GDB, the GNU debugger.
- Copyright 2008 Free Software Foundation, Inc.
+ Copyright 2005 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
+ the Free Software Foundation; either version 2 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/>. */
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This program is intended to be started outside of gdb, then
manually stopped via a signal. */
Index: gdb-6.8.50.20081128/gdb/testsuite/gdb.threads/attachstop-mt.exp
===================================================================
--- gdb-6.8.50.20081128.orig/gdb/testsuite/gdb.threads/attachstop-mt.exp 2008-09-28 13:39:45.000000000 +0200
+++ gdb-6.8.50.20081128/gdb/testsuite/gdb.threads/attachstop-mt.exp 2008-12-06 21:57:23.000000000 +0100
@@ -176,12 +176,23 @@ gdb_test "bt" ".*sleep.*(func|main).*" "
# Exit and detach the process.
gdb_exit
-# Stop the program
-remote_exec build "kill -s STOP ${testpid}"
-
# No race
sleep 2
+set fileid3 [open $status2 r];
+gets $fileid3 line1;
+gets $fileid3 line2;
+close $fileid3;
+
+set test "attach3, exit leaves process stopped"
+if {[string match "*(stopped)*" $line2]} {
+ pass $test
+} else {
+ fail $test
+}
+
+# At this point, the process should still be stopped
+
# Continue the test as we would hit another expected bug regarding
# Program received signal SIGSTOP, Stopped (signal).
# across NPTL threads.
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