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- # Copyright 2012-2022 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 case for forgotten hw-watchpoints after fork()-off of a process.
- set testfile watchpoint-fork
- # Set DEBUG to 0 or 1 in sources
- set debug 0
- proc test {type symbol} {
- global debug
- with_test_prefix "$type" {
- global testfile subdir srcdir gdb_prompt
- set srcfile_type ${srcdir}/${subdir}/${testfile}-${type}.c
- # no threads
- with_test_prefix "singlethreaded" {
- set executable ${testfile}-${type}-st
- set srcfile_main ${testfile}-st.c
- if {[build_executable $testfile.exp $executable \
- [list $srcfile_main ${testfile}-${type}.c] \
- [list debug additional_flags=-D$symbol \
- additional_flags=-DDEBUG=$debug]] == -1} {
- return -1
- }
- clean_restart $executable
- if [target_info exists gdb,no_hardware_watchpoints] {
- # The software watchpoint functionality is in GDB an unrelated test.
- gdb_test_no_output "set can-use-hw-watchpoints 0"
- # Software watchpoints can be quite slow on remote targets
- # on this test because it ends up single-stepping through
- # code to initialize dynamic libraries, etc.
- set factor 20
- } else {
- set factor 1
- }
- gdb_test "show detach-on-fork" "Whether gdb will detach the child of a fork is on\\."
- gdb_test_no_output "set follow-fork-mode $type"
- gdb_test "show follow-fork-mode" "Debugger response to a program call of fork or vfork is \"$type\"\\."
- # Testcase uses it for the `follow-fork-mode child' type.
- gdb_test "handle SIGUSR1 nostop noprint pass" "No\[ \t\]+No\[ \t\]+Yes.*"
- if ![runto_main] {
- return
- }
- gdb_test "watch var" "atchpoint \[0-9\]+: var" "set the watchpoint"
- # It is never hit but it should not be left over in the fork()ed-off child.
- if [skip_hw_breakpoint_tests] {
- set hbreak "break"
- } else {
- set hbreak "hbreak"
- }
- gdb_test "$hbreak marker"
- gdb_breakpoint "mark_exit"
- with_timeout_factor $factor {
- gdb_test "continue" \
- "reakpoint \[0-9\]+, marker.*" "hardware breakpoints work"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 0.*New value = 1.*forkoff *\\(1\\).*" "watchpoints work"
- gdb_test "continue" \
- "reakpoint \[0-9\]+, marker.*" "breakpoint after the first fork"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 1.*New value = 2.*forkoff *\\(2\\).*" "watchpoint after the first fork"
- gdb_test "continue" \
- "reakpoint \[0-9\]+, marker.*" "breakpoint after the second fork"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 2.*New value = 3.*mark_exit \\(\\);" "watchpoint after the second fork"
- gdb_test "continue" "Continuing\\..*\r\n(Thread .* hit )?Breakpoint \[0-9\]+, mark_exit .*" "finish"
- }
- }
- # threads
- if [target_info exists gdb,no_hardware_watchpoints] {
- # Watchpoint hits would get detected in unexpected threads.
- return
- }
- with_test_prefix "multithreaded" {
- set executable ${testfile}-${type}-mt
- set srcfile_main ${srcdir}/${subdir}/${testfile}-mt.c
- if { [gdb_compile_pthreads "${srcfile_main} ${srcfile_type}" \
- [standard_output_file ${executable}] executable \
- [list debug "additional_flags=-D$symbol" \
- "additional_flags=-DDEBUG=$debug" \
- "-DTHREAD"]] != "" } {
- untested "failed to compile"
- return
- }
- clean_restart $executable
- gdb_test_no_output "set follow-fork-mode $type"
- # Testcase uses it for the `follow-fork-mode child' type.
- gdb_test "handle SIGUSR1 nostop noprint pass" "No\[ \t\]+No\[ \t\]+Yes.*"
- if ![runto_main] {
- return
- }
- gdb_test "watch var" "atchpoint \[0-9\]+: var" "set the watchpoint"
- # It should not be left over in the fork()ed-off child.
- gdb_test "$hbreak marker" {reakpoint [0-9]+.*}
- gdb_breakpoint "mark_exit"
- gdb_test "continue" \
- "reakpoint \[0-9\]+, marker.*" "hardware breakpoints work"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 0.*New value = 1.*validity-first.*" "singlethread watchpoints work"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 1.*New value = 2.*validity-thread-A.*" "multithreaded watchpoints work at A"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 2.*New value = 3.*validity-thread-B.*" "multithreaded watchpoints work at B"
- gdb_test "continue" \
- "reakpoint \[0-9\]+, marker.*" "breakpoint (A) after the first fork"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 3.*New value = 4.*after-fork1-A.*" "watchpoint A after the first fork"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 4.*New value = 5.*after-fork1-B.*" "watchpoint B after the first fork"
- gdb_test "continue" \
- "reakpoint \[0-9\]+, marker.*" "breakpoint (A) after the second fork"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 5.*New value = 6.*after-fork2-A.*" "watchpoint A after the second fork"
- gdb_test "continue" \
- "atchpoint \[0-9\]+: var.*Old value = 6.*New value = 7.*after-fork2-B.*" "watchpoint B after the second fork"
- gdb_test "continue" "Continuing\\..*\r\nThread .* hit Breakpoint \[0-9\]+, mark_exit .*" "finish"
- }
- }
- }
- test parent FOLLOW_PARENT
- # Only GNU/Linux is known to support `set follow-fork-mode child'.
- if [istarget "*-*-linux*"] {
- test child FOLLOW_CHILD
- } else {
- untested "${testfile}: child"
- }
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