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# This testcase is part of GDB, the GNU debugger.
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# Copyright 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Check that GDB can support multiple watchpoints across threads.
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# This test verifies that a watchpoint is detected in the proper thread
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# so the test is only meaningful on a system with hardware watchpoints.
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if [target_info exists gdb,no_hardware_watchpoints] {
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proc target_no_stopped_data { } {
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return [istarget s390*-*-*]
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set testfile "watchthreads"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_test_no_output "set can-use-hw-watchpoints 1" ""
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# Run to `main' where we begin our tests.
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if ![runto_main] then {
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# Watch values that will be modified by distinct threads.
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gdb_test "watch args\[0\]" "Hardware watchpoint 2: args\\\[0\\\]"
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gdb_test "watch args\[1\]" "Hardware watchpoint 3: args\\\[1\\\]"
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set init_line [gdb_get_line_number "Init value"]
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set inc_line [gdb_get_line_number "Loop increment"]
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set main_loc "main \\\(\\\) at .*watchthreads.c:$init_line"
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set thread0_loc "thread_function \\\(arg=0x0\\\) at .*watchthreads.c:$inc_line"
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set thread1_loc "thread_function \\\(arg=0x1\\\) at .*watchthreads.c:$inc_line"
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# Loop and continue to allow both watchpoints to be triggered.
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for {set i 0} {$i < 30} {incr i} {
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gdb_test_multiple "continue" "threaded watch loop" {
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-re "(.*Hardware watchpoint.*)$gdb_prompt $" {
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# At least one hardware watchpoint was hit. Check if both were.
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set string $expect_out(1,string)
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if [regexp "Hardware watchpoint 2: args\\\[0\\\]\[^\r\]*\r\[^\r\]*\r\[^\r\]*Old value = $args_0\[^\r\]*\r\[^\r\]*New value = [expr $args_0+1]\r" $string] {
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if [regexp "Hardware watchpoint 3: args\\\[1\\\]\[^\r\]*\r\[^\r\]*\r\[^\r\]*Old value = $args_1\[^\r\]*\r\[^\r\]*New value = [expr $args_1+1]\r" $string] {
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set expected_loc "bogus location"
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if { $test_flag_0 == 1 && $test_flag_1 == 0 && $args_0 == 1 } {
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set expected_loc $main_loc
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} elseif { $test_flag_0 == 0 && $test_flag_1 == 1 && $args_1 == 1 } {
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set expected_loc $main_loc
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} elseif { $test_flag_0 == 1 && $test_flag_1 == 0 } {
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set expected_loc $thread0_loc
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} elseif { $test_flag_0 == 0 && $test_flag_1 == 1 } {
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set expected_loc $thread1_loc
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} elseif { $test_flag_0 + $test_flag_1 == 2 } {
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# On S/390, or any other system which can not report the
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# stopped data address, it is OK to report two watchpoints
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# at once in this test. Make sure the reported location
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# corresponds to at least one of the watchpoints (and not,
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# e.g., __nptl_create_event). On other systems, we should
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# report the two watchpoints serially.
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if { [target_no_stopped_data] } {
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set expected_loc "($main_loc|$thread0_loc|$thread1_loc)"
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if [ regexp "$expected_loc" $string ] {
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fail "threaded watch loop"
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# If one of the watchpoints is disabled, we'd better not stop there.
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if { !$hwwp_2_enabled && $test_flag_0 } {
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fail "disabled hw watchpoint 2 triggered"
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if { !$hwwp_3_enabled && $test_flag_1 } {
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fail "disabled hw watchpoint 3 triggered"
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# If we get to 10 in one of the watched locations disable it so we
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# see some of the other watched location.
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# 10 is chosen so we're guaranteed to come through here.
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if { $hwwp_2_enabled && $hwwp_3_enabled } {
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if { $args_0 >= 10 && $hwwp_2_enabled } {
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gdb_test_no_output "disable 2" "disable first watchpoint at 10"
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} elseif { $args_1 >= 10 && $hwwp_3_enabled } {
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gdb_test_no_output "disable 3" "disable first watchpoint at 10"
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# If we fail above, don't bother continuing loop
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if { $test_flag == 0 } {
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# Print success message if loop succeeded.
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if { $test_flag == 1 } {
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pass "threaded watch loop"
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# Verify that we hit first watchpoint in main thread.
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set message "first watchpoint on args\[0\] hit"
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# Verify that we hit second watchpoint in main thread.
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set message "first watchpoint on args\[1\] hit"
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# Verify that we hit first watchpoint in child thread.
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set message "watchpoint on args\[0\] hit in thread"
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# Verify that we hit second watchpoint in child thread.
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set message "watchpoint on args\[1\] hit in thread"
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# Verify that all watchpoint hits are accounted for.
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set message "combination of threaded watchpoints = 30"
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if { [target_no_stopped_data] } {
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# See above. If we allow two watchpoints to be hit at once, we
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# may have more than 30 hits total.
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set result [expr $args_0 + $args_1 >= 30]
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set result [expr $args_0 + $args_1 == 30]
added
removed
.pc/linaro-gdb.patch/gdb/testsuite/gdb.threads/watchthreads.exp
