--- /dev/null
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2015 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 <assert.h>
+#include <pthread.h>
+#include <unistd.h>
+
+/* Number of threads. Each thread continuously steps over a
+ breakpoint. */
+#define NTHREADS 10
+
+pthread_t threads[NTHREADS];
+
+pthread_barrier_t barrier;
+
+/* Used to create a conditional breakpoint that always fails. */
+volatile int zero;
+
+static void *
+thread_func (void *arg)
+{
+ pthread_barrier_wait (&barrier);
+
+ while (1)
+ {
+ usleep (1); /* set break here */
+ }
+
+ return NULL;
+}
+
+int
+main (void)
+{
+ int ret;
+ int i;
+
+ /* Don't run forever. */
+ alarm (180);
+
+ pthread_barrier_init (&barrier, NULL, NTHREADS + 1);
+
+ /* Start the threads that constantly hits a conditional breakpoint
+ that needs to be stepped over. */
+ for (i = 0; i < NTHREADS; i++)
+ {
+ ret = pthread_create (&threads[i], NULL, thread_func, NULL);
+ assert (ret == 0);
+ }
+
+ /* Wait until all threads are up and running. */
+ pthread_barrier_wait (&barrier);
+
+ /* Let them start hitting the breakpoint. */
+ usleep (100);
+
+ /* Exit abruptly. */
+ return 0;
+}
--- /dev/null
+# Copyright (C) 2015 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/>.
+
+# This test spawns a few threads that constantly trip on a breakpoint
+# that does not cause a user-visible stop. While one of those
+# breakpoints is being handled, the main thread exits the whole
+# process. The result is that the current thread for which GDB is
+# handling the event disappears too and any attempt to access
+# register/memory now errors out. GDB and GDBserver should be able to
+# handle this scenario gracefully.
+#
+# See https://sourceware.org/bugzilla/show_bug.cgi?id=18749
+
+standard_testfile
+
+set linenum [gdb_get_line_number "set break here"]
+
+if {[build_executable "failed to prepare" $testfile $srcfile {debug pthreads}] == -1} {
+ return -1
+}
+
+# The test proper. If COND_BP_TARGET is true, then test with
+# conditional breakpoints evaluated on the target side, if possible.
+
+proc do_test { non_stop cond_bp_target } {
+ global GDBFLAGS
+ global gdb_prompt
+ global binfile
+ global linenum
+
+ set saved_gdbflags $GDBFLAGS
+ set GDBFLAGS [concat $GDBFLAGS " -ex \"set non-stop $non_stop\""]
+ clean_restart $binfile
+ set GDBFLAGS $saved_gdbflags
+
+ if ![runto_main] then {
+ fail "Can't run to main"
+ return 0
+ }
+
+ # Whether it's known that the test fails.
+ set should_kfail 0
+
+ if {![gdb_is_target_remote]} {
+ set should_kfail 1
+ } else {
+ if {!$cond_bp_target} {
+ # Leaving breakpoint evaluation to GDB exposes failures
+ # similar to native debugging.
+ gdb_test_no_output "set remote conditional-breakpoints-packet off"
+ set should_kfail 1
+ } else {
+ set test "show remote conditional-breakpoints-packet"
+ gdb_test_multiple $test $test {
+ -re "currently enabled\.\r\n$gdb_prompt $" {
+ pass $test
+ }
+ -re "currently disabled\.\r\n$gdb_prompt $" {
+ unsupported "no support for target-side conditional breakpoints"
+ return
+ }
+ }
+ set should_kfail 1
+ }
+ }
+
+ gdb_test "break $linenum if zero == 1" \
+ "Breakpoint .*" \
+ "set breakpoint that evals false"
+
+ set test "continue &"
+ gdb_test_multiple $test $test {
+ -re "$gdb_prompt " {
+ pass $test
+ }
+ }
+
+ set ok 0
+
+ # Setup the kfail upfront in order to also catch GDB internal
+ # errors.
+ if {$should_kfail} {
+ setup_kfail "gdb/18749" "*-*-*"
+ }
+
+ set test "inferior 1 exited"
+ gdb_test_multiple "" $test {
+ -re "Inferior 1 \(\[^\r\n\]+\) exited normally" {
+ set ok 1
+
+ # Clear the kfail to avoid a PASS -> KPASS dance across
+ # runs.
+ clear_kfail "*-*-linux*"
+
+ pass $test
+ }
+ -re "$gdb_prompt " {
+ # Several errors end up at the top level, and printing the
+ # prompt.
+ fail "$test (prompt)"
+ }
+ -re "Cannot access memory" {
+ fail "$test (memory error)"
+ }
+ eof {
+ fail "$test (GDB died)"
+ }
+ }
+
+ if {!$ok} {
+ # No use testing further.
+ return
+ }
+
+ gdb_test "info threads" "No threads\." \
+ "no threads left"
+}
+
+# Wrapper for foreach that calls with_test_prefix on each iteration,
+# including the iterator's current value in the prefix.
+
+proc foreach_with_prefix {var list body} {
+ upvar 1 $var myvar
+ foreach myvar $list {
+ with_test_prefix "$var=$myvar" {
+ uplevel 1 $body
+ }
+ }
+}
+
+foreach_with_prefix non_stop {"on" "off"} {
+ foreach_with_prefix cond_bp_target {1 0} {
+ do_test $non_stop $cond_bp_target
+ }
+}
projects / binutils-gdb.git / commitdiff