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- # Copyright (C) 2014-2022 Free Software Foundation, Inc.
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation; either version 3 of the License, or
- # (at your option) any later version.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with this program. If not, see <http://www.gnu.org/licenses/>.
- # Test that when a step-over trips on a watchpoint, that watchpoint is
- # reported.
- standard_testfile
- set executable ${testfile}
- # This test verifies that a watchpoint is detected in a multithreaded
- # program so the test is only meaningful on a system with hardware
- # watchpoints.
- if {[skip_hw_watchpoint_tests]} {
- return 0
- }
- if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" \
- executable [list debug "incdir=${objdir}"]] != "" } {
- return -1
- }
- # The test proper. DISPLACED is true if we should try with displaced
- # stepping. WITH_BP is true if we should try with a thread-specific
- # breakpoint (for the wrong thread) right after the instruction that
- # triggers the watchpoint.
- proc do_test { displaced with_bp } {
- global executable
- global gdb_prompt
- global hex
- if ${with_bp} {
- set prefix "with thread-specific bp"
- } else {
- set prefix "no thread-specific bp"
- }
- with_test_prefix "displaced=$displaced: $prefix" {
- # Cover both stepping and non-stepping execution commands.
- foreach command {"step" "next" "continue" } {
- with_test_prefix $command {
- clean_restart $executable
- if ![runto_main] {
- continue
- }
- gdb_test_no_output "set displaced-stepping $displaced"
- set line [gdb_get_line_number "set wait-thread breakpoint here"]
- if { ![gdb_breakpoint $line] } {
- return
- }
- gdb_continue_to_breakpoint "run to wait-thread breakpoint"
- gdb_test "info threads" "\\\* 1 .* 2 .*" "info threads shows all threads"
- gdb_test_no_output "set scheduler-locking on"
- delete_breakpoints
- gdb_breakpoint [gdb_get_line_number "set breakpoint child here"]
- gdb_test "thread 2" "Switching to .*"
- gdb_continue_to_breakpoint "run to breakpoint in thread 2"
- set address_triggers_watch "<invalid>"
- set after_address_triggers_watch "<invalid>"
- # Let the watchpoint trigger once (with the other
- # thread locked), in order to find both the address of
- # the instruction that triggers the watchpoint and the
- # address of the instruction immediately after.
- with_test_prefix "find addresses" {
- gdb_test "p watch_me = 0" " = 0" "clear watch_me"
- gdb_test "watch watch_me" "Hardware watchpoint .*"
- gdb_test "continue" \
- "Hardware watchpoint.*: watch_me.*New value = 1.*" \
- "continue to watchpoint"
- set msg "find addresses"
- gdb_test_multiple "disassemble" $msg {
- -re " ($hex) \[^\r\n\]*\r\n=> ($hex) .*$gdb_prompt $" {
- set address_triggers_watch $expect_out(1,string)
- set after_address_triggers_watch $expect_out(2,string)
- pass $msg
- }
- }
- delete_breakpoints
- }
- gdb_test "break *$address_triggers_watch" "Breakpoint .*" \
- "set breakpoint at address that triggers watch"
- gdb_continue_to_breakpoint \
- "run to instruction that triggers watch in thread 2"
- gdb_test "p counter = 0" " = 0" "unbreak loop in thread 2"
- gdb_test "p watch_me = 0" " = 0" "clear watch_me"
- gdb_test "watch watch_me" "Hardware watchpoint .*"
- if ${with_bp} {
- gdb_test "b *$after_address_triggers_watch thread 1" \
- "Breakpoint .*" \
- "set breakpoint specific to thread 1"
- }
- # Switch back to thread 1 and disable scheduler locking.
- gdb_test "thread 1" "Switching to .*"
- gdb_test_no_output "set scheduler-locking off"
- # Thread 2 is still stopped at a breakpoint that needs
- # to be stepped over. However, the instruction that
- # is under the breakpoint triggers a watchpoint, which
- # should trap and be reported to the user.
- gdb_test "$command" "Hardware watchpoint.*: watch_me.*New value = 1.*"
- }
- }
- }
- }
- foreach displaced { "off" "on" } {
- if { $displaced != "off" && ![support_displaced_stepping] } {
- continue
- }
- foreach with_bp { 0 1 } {
- do_test $displaced $with_bp
- }
- }
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