1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 2004-2024 Free Software Foundation, Inc.
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6 # it under the terms of the GNU General Public License as published by
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
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18 # Check that GDB can support multiple watchpoints across threads.
21 # This test verifies that a watchpoint is detected in the proper thread
22 # so the test is only meaningful on a system with hardware watchpoints.
23 require allow_hw_watchpoint_multi_tests
25 proc target_no_stopped_data { } {
26 return [istarget s390*-*-*]
30 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable debug] != "" } {
34 clean_restart $binfile
35 gdb_test_no_output "set can-use-hw-watchpoints 1" ""
38 # Run to `main' where we begin our tests.
48 # Watch values that will be modified by distinct threads.
49 gdb_test "watch args\[0\]" "Hardware watchpoint 2: args\\\[0\\\]"
50 gdb_test "watch args\[1\]" "Hardware watchpoint 3: args\\\[1\\\]"
54 set init_line [gdb_get_line_number "Init value"]
55 set inc_line [gdb_get_line_number "Loop increment"]
56 set main_loc "main \\\(\\\) at .*watchthreads.c:$init_line"
57 set thread0_loc "thread_function \\\(arg=0x0\\\) at .*watchthreads.c:$inc_line"
58 set thread1_loc "thread_function \\\(arg=0x1\\\) at .*watchthreads.c:$inc_line"
60 # Loop and continue to allow both watchpoints to be triggered.
61 for {set i 0} {$i < 30} {incr i} {
65 gdb_test_multiple "continue" "threaded watch loop" {
66 -re "(.*Hardware watchpoint.*)$gdb_prompt $" {
67 # At least one hardware watchpoint was hit. Check if both were.
68 set string $expect_out(1,string)
70 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] {
74 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] {
79 set expected_loc "bogus location"
80 if { $test_flag_0 == 1 && $test_flag_1 == 0 && $args_0 == 1 } {
81 set expected_loc $main_loc
82 } elseif { $test_flag_0 == 0 && $test_flag_1 == 1 && $args_1 == 1 } {
83 set expected_loc $main_loc
84 } elseif { $test_flag_0 == 1 && $test_flag_1 == 0 } {
85 set expected_loc $thread0_loc
86 } elseif { $test_flag_0 == 0 && $test_flag_1 == 1 } {
87 set expected_loc $thread1_loc
88 } elseif { $test_flag_0 + $test_flag_1 == 2 } {
89 # On S/390, or any other system which can not report the
90 # stopped data address, it is OK to report two watchpoints
91 # at once in this test. Make sure the reported location
92 # corresponds to at least one of the watchpoints (and not,
93 # e.g., __nptl_create_event). On other systems, we should
94 # report the two watchpoints serially.
95 if { [target_no_stopped_data] } {
96 set expected_loc "($main_loc|$thread0_loc|$thread1_loc)"
100 if [ regexp "$expected_loc" $string ] {
103 fail "threaded watch loop"
106 # If one of the watchpoints is disabled, we'd better not stop there.
107 if { !$hwwp_2_enabled && $test_flag_0 } {
108 fail "disabled hw watchpoint 2 triggered"
110 if { !$hwwp_3_enabled && $test_flag_1 } {
111 fail "disabled hw watchpoint 3 triggered"
114 # If we get to 10 in one of the watched locations disable it so we
115 # see some of the other watched location.
116 # 10 is chosen so we're guaranteed to come through here.
117 if { $hwwp_2_enabled && $hwwp_3_enabled } {
118 if { $args_0 >= 10 && $hwwp_2_enabled } {
119 gdb_test_no_output "disable 2" "disable first watchpoint at 10"
121 } elseif { $args_1 >= 10 && $hwwp_3_enabled } {
122 gdb_test_no_output "disable 3" "disable first watchpoint at 10"
129 # If we fail above, don't bother continuing loop
130 if { $test_flag == 0 } {
135 # Print success message if loop succeeded.
136 if { $test_flag == 1 } {
137 pass "threaded watch loop"
140 # Verify that we hit first watchpoint in main thread.
141 set message "first watchpoint on args\[0\] hit"
148 # Verify that we hit second watchpoint in main thread.
149 set message "first watchpoint on args\[1\] hit"
156 # Verify that we hit first watchpoint in child thread.
157 set message "watchpoint on args\[0\] hit in thread"
164 # Verify that we hit second watchpoint in child thread.
165 set message "watchpoint on args\[1\] hit in thread"
172 # Verify that all watchpoint hits are accounted for.
173 set message "combination of threaded watchpoints = 30"
174 if { [target_no_stopped_data] } {
175 # See above. If we allow two watchpoints to be hit at once, we
176 # may have more than 30 hits total.
177 set result [expr $args_0 + $args_1 >= 30]
179 set result [expr $args_0 + $args_1 == 30]