1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 # Check that GDB can support multiple watchpoints across threads.
25 # This test verifies that a watchpoint is detected in the proper thread
26 # so the test is only meaningful on a system with hardware watchpoints.
27 if [target_info exists gdb,no_hardware_watchpoints] {
31 proc target_no_stopped_data { } {
32 return [istarget s390*-*-*]
35 set testfile "watchthreads"
36 set srcfile ${testfile}.c
37 set binfile ${objdir}/${subdir}/${testfile}
38 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
44 gdb_reinitialize_dir $srcdir/$subdir
47 gdb_test "set can-use-hw-watchpoints 1" "" ""
50 # Run to `main' where we begin our tests.
53 if ![runto_main] then {
60 # Watch values that will be modified by distinct threads.
61 gdb_test "watch args\[0\]" "Hardware watchpoint 2: args\\\[0\\\]"
62 gdb_test "watch args\[1\]" "Hardware watchpoint 3: args\\\[1\\\]"
66 set init_line [gdb_get_line_number "Init value"]
67 set inc_line [gdb_get_line_number "Loop increment"]
68 set main_loc "main \\\(\\\) at .*watchthreads.c:$init_line"
69 set thread0_loc "thread_function \\\(arg=0x0\\\) at .*watchthreads.c:$inc_line"
70 set thread1_loc "thread_function \\\(arg=0x1\\\) at .*watchthreads.c:$inc_line"
72 # Loop and continue to allow both watchpoints to be triggered.
73 for {set i 0} {$i < 30} {incr i} {
77 gdb_test_multiple "continue" "threaded watch loop" {
78 -re "(.*Hardware watchpoint.*)$gdb_prompt $" {
79 # At least one hardware watchpoint was hit. Check if both were.
80 set string $expect_out(1,string)
82 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] {
86 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] {
91 set expected_loc "bogus location"
92 if { $test_flag_0 == 1 && $test_flag_1 == 0 && $args_0 == 1 } {
93 set expected_loc $main_loc
94 } elseif { $test_flag_0 == 0 && $test_flag_1 == 1 && $args_1 == 1 } {
95 set expected_loc $main_loc
96 } elseif { $test_flag_0 == 1 && $test_flag_1 == 0 } {
97 set expected_loc $thread0_loc
98 } elseif { $test_flag_0 == 0 && $test_flag_1 == 1 } {
99 set expected_loc $thread1_loc
100 } elseif { $test_flag_0 + $test_flag_1 == 2 } {
101 # On S/390, or any other system which can not report the
102 # stopped data address, it is OK to report two watchpoints
103 # at once in this test. Make sure the reported location
104 # corresponds to at least one of the watchpoints (and not,
105 # e.g., __nptl_create_event). On other systems, we should
106 # report the two watchpoints serially.
107 if { [target_no_stopped_data] } {
108 set expected_loc "($main_loc|$thread0_loc|$thread1_loc)"
112 if [ regexp "$expected_loc" $string ] {
115 fail "threaded watch loop"
118 # If one of the watchpoints is disabled, we'd better not stop there.
119 if { !$hwwp_2_enabled && $test_flag_0 } {
120 fail "disabled hw watchpoint 2 triggered"
122 if { !$hwwp_3_enabled && $test_flag_1 } {
123 fail "disabled hw watchpoint 3 triggered"
126 # If we get to 10 in one of the watched locations disable it so we
127 # see some of the other watched location.
128 # 10 is chosen so we're guaranteed to come through here.
129 if { $hwwp_2_enabled && $hwwp_3_enabled } {
130 if { $args_0 >= 10 && $hwwp_2_enabled } {
131 gdb_test "disable 2" "" "disable first watchpoint at 10"
133 } elseif { $args_1 >= 10 && $hwwp_3_enabled } {
134 gdb_test "disable 3" "" "disable first watchpoint at 10"
141 # If we fail above, don't bother continuing loop
142 if { $test_flag == 0 } {
147 # Print success message if loop succeeded.
148 if { $test_flag == 1 } {
149 pass "threaded watch loop"
152 # Verify that we hit first watchpoint in main thread.
153 set message "first watchpoint on args\[0\] hit"
160 # Verify that we hit second watchpoint in main thread.
161 set message "first watchpoint on args\[1\] hit"
168 # Verify that we hit first watchpoint in child thread.
169 set message "watchpoint on args\[0\] hit in thread"
176 # Verify that we hit second watchpoint in child thread.
177 set message "watchpoint on args\[1\] hit in thread"
184 # Verify that all watchpoint hits are accounted for.
185 set message "combination of threaded watchpoints = 30"
186 if { [target_no_stopped_data] } {
187 # See above. If we allow two watchpoints to be hit at once, we
188 # may have more than 30 hits total.
189 set result [expr $args_0 + $args_1 >= 30]
191 set result [expr $args_0 + $args_1 == 30]