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https://sourceware.org/git/binutils-gdb.git
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137 lines
4.3 KiB
Plaintext
137 lines
4.3 KiB
Plaintext
# Copyright (C) 2014-2018 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Test that when a step-over trips on a watchpoint, that watchpoint is
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# reported.
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standard_testfile
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set executable ${testfile}
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# This test verifies that a watchpoint is detected in a multithreaded
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# program so the test is only meaningful on a system with hardware
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# watchpoints.
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if {[skip_hw_watchpoint_tests]} {
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return 0
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}
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if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" \
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executable [list debug "incdir=${objdir}"]] != "" } {
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return -1
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}
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# The test proper. DISPLACED is true if we should try with displaced
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# stepping. WITH_BP is true if we should try with a thread-specific
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# breakpoint (for the wrong thread) right after the instruction that
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# triggers the watchpoint.
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proc do_test { displaced with_bp } {
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global executable
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global gdb_prompt
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global hex
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if ${with_bp} {
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set prefix "with thread-specific bp"
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} else {
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set prefix "no thread-specific bp"
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}
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with_test_prefix "displaced=$displaced: $prefix" {
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# Cover both stepping and non-stepping execution commands.
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foreach command {"step" "next" "continue" } {
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with_test_prefix $command {
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clean_restart $executable
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if ![runto_main] {
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continue
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}
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gdb_test_no_output "set displaced-stepping $displaced"
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gdb_breakpoint [gdb_get_line_number "set wait-thread breakpoint here"]
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gdb_continue_to_breakpoint "run to wait-thread breakpoint"
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gdb_test "info threads" "\\\* 1 .* 2 .*" "info threads shows all threads"
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gdb_test_no_output "set scheduler-locking on"
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delete_breakpoints
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gdb_breakpoint [gdb_get_line_number "set breakpoint child here"]
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gdb_test "thread 2" "Switching to .*"
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gdb_continue_to_breakpoint "run to breakpoint in thread 2"
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set address_triggers_watch "<invalid>"
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set after_address_triggers_watch "<invalid>"
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# Let the watchpoint trigger once (with the other
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# thread locked), in order to find both the address of
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# the instruction that triggers the watchpoint and the
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# address of the instruction immediately after.
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with_test_prefix "find addresses" {
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gdb_test "p watch_me = 0" " = 0" "clear watch_me"
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gdb_test "watch watch_me" "Hardware watchpoint .*"
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gdb_test "continue" \
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"Hardware watchpoint.*: watch_me.*New value = 1.*" \
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"continue to watchpoint"
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set msg "find addresses"
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gdb_test_multiple "disassemble" $msg {
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-re " ($hex) \[^\r\n\]*\r\n=> ($hex) .*$gdb_prompt $" {
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set address_triggers_watch $expect_out(1,string)
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set after_address_triggers_watch $expect_out(2,string)
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pass $msg
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}
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}
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delete_breakpoints
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}
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gdb_test "break *$address_triggers_watch" "Breakpoint .*" \
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"set breakpoint at address that triggers watch"
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gdb_continue_to_breakpoint \
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"run to instruction that triggers watch in thread 2"
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gdb_test "p counter = 0" " = 0" "unbreak loop in thread 2"
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gdb_test "p watch_me = 0" " = 0" "clear watch_me"
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gdb_test "watch watch_me" "Hardware watchpoint .*"
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if ${with_bp} {
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gdb_test "b *$after_address_triggers_watch thread 1" \
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"Breakpoint .*" \
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"set breakpoint specific to thread 1"
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}
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# Switch back to thread 1 and disable scheduler locking.
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gdb_test "thread 1" "Switching to .*"
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gdb_test_no_output "set scheduler-locking off"
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# Thread 2 is still stopped at a breakpoint that needs
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# to be stepped over. However, the instruction that
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# is under the breakpoint triggers a watchpoint, which
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# should trap and be reported to the user.
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gdb_test "$command" "Hardware watchpoint.*: watch_me.*New value = 1.*"
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}
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}
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}
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}
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foreach displaced { "off" "on" } {
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if { $displaced != "off" && ![support_displaced_stepping] } {
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continue
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}
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foreach with_bp { 0 1 } {
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do_test $displaced $with_bp
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}
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}
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