1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 2007-2024 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 # watch-thread_num.exp Test thread <thread_num> parameter for
22 # This test verifies that a watchpoint is detected in the proper thread
23 # so the test is only meaningful on a system with hardware watchpoints.
24 # More specifically, the implementation of this test uses access
25 # watchpoints, so skip it when those are not available.
26 require allow_hw_watchpoint_access_tests
30 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
34 clean_restart ${binfile}
40 gdb_test "watch shared_var thread 0" "Invalid thread ID: 0" "watchpoint on invalid thread"
41 gdb_test "watch shared_var thread" "A syntax error in expression, near `thread'\." "invalid watch syntax"
43 set bpexitline [gdb_get_line_number "all threads started"]
44 gdb_breakpoint "$bpexitline"
45 gdb_continue_to_breakpoint "all threads started"
47 gdb_test "break loop" "Breakpoint \[0-9\].*" \
48 "Set breakpoint at loop"
50 gdb_test "continue" ".*Breakpoint .*loop.*" "stopped in loop"
52 gdb_test_multiple "thread" "thread command" {
53 -re ".*Current thread is (\[0-9\]*).*$gdb_prompt $" {
58 set thread_num "$expect_out(1,string)"
62 # We use an access watchpoint rather than a write watchpoint, because
63 # GDB can drop the latter when multiple threads trigger events
64 # simultaneously, on targets with continuable watchpoints, such as
65 # x86. See PR breakpoints/10116.
67 gdb_test "awatch shared_var thread $thread_num" \
68 "Hardware access \\(read/write\\) watchpoint .*: shared_var.*" \
69 "watchpoint on shared variable"
71 gdb_test "info breakpoint \$bpnum" \
72 "stop only in thread $thread_num" \
73 "info breakpoint shows watchpoint is thread-specific"
75 # Uncomment to see additional information.
76 #gdb_test "set debug infrun 1"
78 for {set i 1} {$i <= 5} {incr i} {
79 set watchpoint "Watchpoint triggered iteration $i"
80 set check "Check thread that triggered iteration $i"
84 gdb_test_multiple "continue" $test {
85 -re "Hardware access \\(read/write\\) watchpoint .*: shared_var" {
90 if { $seen_watchpoint } {
96 -re "\\\[infrun\\\] " {
97 # Avoid timeouts when debugging GDB.
101 gdb_test "thread" ".*Current thread is $thread_num .*" $check