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# This testcase is part of GDB, the GNU debugger.
# Copyright 2009-2023 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/>.
# This test verifies that a local watchpoint isn't deleted when a
# thread other than the thread the local watchpoint was set in stops
# for a breakpoint.
require allow_hw_watchpoint_multi_tests
standard_testfile
if {[gdb_compile_pthreads \
"${srcdir}/${subdir}/${srcfile}" \
"${binfile}" executable {debug} ] != "" } {
return -1
}
clean_restart ${binfile}
gdb_test_no_output "set can-use-hw-watchpoints 1" ""
if {![runto_main]} {
return
}
set inc_line_1 [gdb_get_line_number "Loop increment 1"]
set inc_line_2 [gdb_get_line_number "Loop increment 2"]
set bkpt_here [gdb_get_line_number "set breakpoint here"]
# Run to the loop within thread_function0, so we can set our local
# watchpoint.
gdb_test "break ${srcfile}:${inc_line_1}" \
"Breakpoint 2 at .*: file .*${srcfile}, line .*" \
"breakpoint on thread_function0"
gdb_test "continue" \
".*Breakpoint 2.*thread_function0.*" \
"continue to thread_function0"
delete_breakpoints
# Set the local watchpoint, and confirm that it traps as expected.
gdb_test "watch *myp" \
"Hardware watchpoint 3\: \\*myp.*" \
"set local watchpoint on *myp"
gdb_test "continue" \
"Hardware watchpoint.*Old value.*New value.*thread_function0.*" \
"local watchpoint triggers"
delete_breakpoints
# Recreate the watchpoint, but this time with a condition we know
# won't trigger. This is so the watchpoint is inserted, and the
# target reports events, but GDB doesn't stop for them. We want to
# hit the breakpoints on the other thread, and make sure this
# watchpoint isn't deleted then.
gdb_test "watch *myp if trigger != 0" \
"Hardware watchpoint 4\: \\*myp.*" \
"set local watchpoint on *myp, with false conditional"
# Run to a breakpoint on a different thread. The previous local
# watchpoint should not be deleted with the standard 'the program has
# left the block in which its expression is valid', because the
# thread_function0 thread should still be running in the loop.
gdb_test "break ${srcfile}:${inc_line_2}" \
"Breakpoint 5 at .*: file .*${srcfile}, line .*" \
"breakpoint on the other thread"
gdb_test "continue" \
"Breakpoint 5, thread_function1.*" \
"the other thread stopped on breakpoint"
# Delete the new breakpoint, we don't need it anymore.
gdb_test_no_output "delete 5" ""
# Check if the local watchpoint hasn't been deleted (is still listed).
# This is simpler to check than expecting 'the program has left ...',
# and, is immune to string changes in that warning.
gdb_test "info breakpoints" \
".*4.*hw watchpoint.*keep.*y.*\\*myp.*" \
"local watchpoint is still in breakpoint list"
# Make the watchpoint condition eval true.
gdb_test_no_output "set trigger=1" "let local watchpoint trigger"
gdb_test "continue" \
"Hardware watchpoint.*Old value.*New value.*thread_function0.*" \
"local watchpoint still triggers"
# Confirm that the local watchpoint is indeed deleted when
# thread_function0 returns.
gdb_test_no_output "set *myp=0" "let thread_function0 return"
gdb_test "break ${srcfile}:${bkpt_here}" \
"Breakpoint 6 at .*: file .*${srcfile}, line .*" \
"breakpoint on thread_function0's caller"
gdb_test "continue" \
".*Watchpoint.*deleted.*" \
"local watchpoint automatically deleted"
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