1 # Copyright 2022-2024 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
16 # Test for conditional breakpoints where the breakpoint condition includes
17 # an inferior function call.
19 # The tests in this script are testing what happens when an event arrives in
20 # another thread while GDB is waiting for the inferior function call (in the
21 # breakpoint condition) to finish.
23 # The expectation is that GDB will queue events for other threads and wait
24 # for the inferior function call to complete, if the condition is true, then
25 # the conditional breakpoint should be reported first. The other thread
26 # event should of course, not get lost, and should be reported as soon as
27 # the user tries to continue the inferior.
29 # If the conditional breakpoint ends up not being taken (the condition is
30 # false), then the other thread event should be reported immediately.
32 # This script tests what happens when the other thread event is (a) the
33 # other thread hitting a breakpoint, and (b) the other thread taking a
34 # signal (SIGSEGV in this case).
38 if { [build_executable "failed to prepare" ${binfile} "${srcfile}" \
39 {debug pthreads}] == -1 } {
43 set cond_bp_line [gdb_get_line_number "First thread breakpoint"]
44 set other_bp_line [gdb_get_line_number "Other thread breakpoint"]
45 set final_bp_line [gdb_get_line_number "Final breakpoint here"]
46 set signal_line [gdb_get_line_number "Signal here"]
48 # Start GDB based on TARGET_ASYNC and TARGET_NON_STOP, and then runto main.
49 proc start_gdb_and_runto_main { target_async target_non_stop } {
50 save_vars { ::GDBFLAGS } {
52 " -ex \"maint set target-non-stop $target_non_stop\""
54 " -ex \"maintenance set target-async ${target_async}\""
56 clean_restart ${::binfile}
59 if { ![runto_main] } {
66 # Run a test of GDB's conditional breakpoints, where the conditions include
67 # inferior function calls. While the inferior function call is executing
68 # another thread will hit a breakpoint (when OTHER_THREAD_SIGNAL is false),
69 # or receive a signal (when OTHER_THREAD_SIGNAL is true). GDB should report
70 # the conditional breakpoint first (if the condition is true), and then
71 # report the second thread event once the inferior is continued again.
73 # When STOP_AT_COND is true then the conditional breakpoint will have a
74 # condition that evaluates to true (and GDB will stop at the breakpoint),
75 # otherwise, the condition will evaluate to false (and GDB will not stop at
77 proc run_condition_test { stop_at_cond other_thread_signal \
78 target_async target_non_stop } {
79 if { [start_gdb_and_runto_main $target_async \
80 $target_non_stop] == -1 } {
84 # Setup the conditional breakpoint.
85 if { $stop_at_cond } {
86 set cond_func "condition_true_func"
88 set cond_func "condition_false_func"
91 "${::srcfile}:${::cond_bp_line} if (${cond_func} ())"
92 set cond_bp_num [get_integer_valueof "\$bpnum" "*UNKNOWN*" \
93 "get number for conditional breakpoint"]
95 if { $other_thread_signal } {
96 # Arrange for the other thread to raise a signal while GDB is
97 # evaluating the breakpoint condition.
98 gdb_test_no_output "set raise_signal = 1"
100 # And a breakpoint that will be hit by another thread only once the
101 # breakpoint condition starts to be evaluated.
102 gdb_breakpoint "${::srcfile}:${::other_bp_line}"
103 set other_bp_num [get_integer_valueof "\$bpnum" "*UNKNOWN*" \
104 "get number for other breakpoint"]
107 # A final breakpoint once the test has completed.
108 gdb_breakpoint "${::srcfile}:${::final_bp_line}"
109 set final_bp_num [get_integer_valueof "\$bpnum" "*UNKNOWN*" \
110 "get number for final breakpoint"]
112 if { $stop_at_cond } {
113 # Continue. The first breakpoint we hit should be the conditional
114 # breakpoint. The other thread will have hit its breakpoint, but
115 # that will have been deferred until the conditional breakpoint is
117 gdb_test "continue" \
122 "Thread ${::decimal} \"\[^\"\r\n\]+\" hit Breakpoint ${cond_bp_num}, worker_func \[^\r\n\]+:${::cond_bp_line}" \
123 "${::decimal}\\s+\[^\r\n\]+First thread breakpoint\[^\r\n\]+"] \
124 "hit the conditional breakpoint"
127 if { $other_thread_signal } {
128 # Now continue again, the other thread will now report that it
130 gdb_test "continue" \
134 "Thread ${::decimal} \"\[^\"\r\n\]+\" received signal SIGSEGV, Segmentation fault\\." \
135 "\\\[Switching to Thread \[^\r\n\]+\\\]" \
136 "${::hex} in worker_func \[^\r\n\]+:${::signal_line}" \
137 "${::decimal}\\s+\[^\r\n\]+Signal here\[^\r\n\]+"] \
138 "received signal in other thread"
140 # Now continue again, the other thread will now report its
142 gdb_test "continue" \
147 "Thread ${::decimal} \"\[^\"\r\n\]+\" hit Breakpoint ${other_bp_num}, worker_func \[^\r\n\]+:${::other_bp_line}" \
148 "${::decimal}\\s+\[^\r\n\]+Other thread breakpoint\[^\r\n\]+"] \
149 "hit the breakpoint in other thread"
151 # Run to the stop marker.
152 gdb_test "continue" \
157 "Thread ${::decimal} \"\[^\"\r\n\]+\" hit Breakpoint ${final_bp_num}, stop_marker \[^\r\n\]+:${::final_bp_line}" \
158 "${::decimal}\\s+\[^\r\n\]+Final breakpoint here\[^\r\n\]+"] \
159 "hit the final breakpoint"
165 foreach_with_prefix target_async { "on" "off" } {
166 foreach_with_prefix target_non_stop { "on" "off" } {
167 foreach_with_prefix other_thread_signal { true false } {
168 foreach_with_prefix stop_at_cond { true false } {
169 run_condition_test $stop_at_cond $other_thread_signal \
170 $target_async $target_non_stop