gdb/testsuite/gdb.threads/watchpoint-fork.exp

   1 # Copyright 2012-2019 Free Software Foundation, Inc.
   2 #
   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.
   7 #
   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.
  12 #
  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/>.
  15
  16 # Test case for forgotten hw-watchpoints after fork()-off of a process.
  17
  18 set testfile watchpoint-fork
  19
  20 proc test {type symbol} {
  21     with_test_prefix "$type" {
  22         global testfile subdir srcdir gdb_prompt
  23
  24         set srcfile_type ${srcdir}/${subdir}/${testfile}-${type}.c
  25
  26         # no threads
  27
  28         with_test_prefix "singlethreaded" {
  29             set executable ${testfile}-${type}-st
  30             set srcfile_main ${testfile}-st.c
  31             if {[build_executable $testfile.exp $executable \
  32                      [list $srcfile_main ${testfile}-${type}.c] \
  33                      [list debug additional_flags=-D$symbol]] == -1} {
  34                 return -1
  35             }
  36
  37             clean_restart $executable
  38
  39             if [target_info exists gdb,no_hardware_watchpoints] {
  40                 # The software watchpoint functionality is in GDB an unrelated test.
  41                 gdb_test_no_output "set can-use-hw-watchpoints 0"
  42                 # Software watchpoints can be quite slow on remote targets
  43                 # on this test because it ends up single-stepping through
  44                 # code to initialize dynamic libraries, etc.
  45                 set factor 20
  46             } else {
  47                 set factor 1
  48             }
  49
  50             gdb_test "show detach-on-fork" "Whether gdb will detach the child of a fork is on\\."
  51             gdb_test_no_output "set follow-fork-mode $type"
  52             gdb_test "show follow-fork-mode" "Debugger response to a program call of fork or vfork is \"$type\"\\."
  53             # Testcase uses it for the `follow-fork-mode child' type.
  54             gdb_test "handle SIGUSR1 nostop noprint pass" "No\[ \t\]+No\[ \t\]+Yes.*"
  55
  56             if ![runto_main] {
  57                 return
  58             }
  59
  60             gdb_test "watch var" "atchpoint \[0-9\]+: var" "set the watchpoint"
  61
  62             # It is never hit but it should not be left over in the fork()ed-off child.
  63             if [skip_hw_breakpoint_tests] {
  64                 set hbreak "break"
  65             } else {
  66                 set hbreak "hbreak"
  67             }
  68             gdb_test "$hbreak marker"
  69
  70             gdb_breakpoint "mark_exit"
  71
  72             with_timeout_factor $factor {
  73                 gdb_test "continue" \
  74                     "reakpoint \[0-9\]+, marker.*" "hardware breakpoints work"
  75                 gdb_test "continue" \
  76                     "atchpoint \[0-9\]+: var.*Old value = 0.*New value = 1.*forkoff *\\(1\\).*" "watchpoints work"
  77                 gdb_test "continue" \
  78                     "reakpoint \[0-9\]+, marker.*" "breakpoint after the first fork"
  79                 gdb_test "continue" \
  80                     "atchpoint \[0-9\]+: var.*Old value = 1.*New value = 2.*forkoff *\\(2\\).*" "watchpoint after the first fork"
  81                 gdb_test "continue" \
  82                     "reakpoint \[0-9\]+, marker.*" "breakpoint after the second fork"
  83                 gdb_test "continue" \
  84                     "atchpoint \[0-9\]+: var.*Old value = 2.*New value = 3.*mark_exit \\(\\);" "watchpoint after the second fork"
  85                 gdb_test "continue" "Continuing\\..*\r\n(Thread .* hit )?Breakpoint \[0-9\]+, mark_exit .*" "finish"
  86             }
  87         }
  88
  89         # threads
  90
  91         if [target_info exists gdb,no_hardware_watchpoints] {
  92             # Watchpoint hits would get detected in unexpected threads.
  93             return
  94         }
  95
  96         with_test_prefix "multithreaded" {
  97             set executable ${testfile}-${type}-mt
  98             set srcfile_main ${srcdir}/${subdir}/${testfile}-mt.c
  99             if { [gdb_compile_pthreads "${srcfile_main} ${srcfile_type}" [standard_output_file ${executable}] executable [list debug "additional_flags=-D$symbol -DTHREAD"]] != "" } {
 100                 untested "failed to compile"
 101                 return
 102             }
 103             clean_restart $executable
 104
 105             gdb_test_no_output "set follow-fork-mode $type"
 106             # Testcase uses it for the `follow-fork-mode child' type.
 107             gdb_test "handle SIGUSR1 nostop noprint pass" "No\[ \t\]+No\[ \t\]+Yes.*"
 108
 109             if ![runto_main] {
 110                 return
 111             }
 112
 113             gdb_test "watch var" "atchpoint \[0-9\]+: var" "set the watchpoint"
 114
 115             # It should not be left over in the fork()ed-off child.
 116             gdb_test "$hbreak marker" {reakpoint [0-9]+.*}
 117
 118             gdb_breakpoint "mark_exit"
 119
 120             gdb_test "continue" \
 121                 "reakpoint \[0-9\]+, marker.*" "hardware breakpoints work"
 122             gdb_test "continue" \
 123                 "atchpoint \[0-9\]+: var.*Old value = 0.*New value = 1.*validity-first.*" "singlethread watchpoints work"
 124             gdb_test "continue" \
 125                 "atchpoint \[0-9\]+: var.*Old value = 1.*New value = 2.*validity-thread-A.*" "multithreaded watchpoints work at A"
 126             gdb_test "continue" \
 127                 "atchpoint \[0-9\]+: var.*Old value = 2.*New value = 3.*validity-thread-B.*" "multithreaded watchpoints work at B"
 128             gdb_test "continue" \
 129                 "reakpoint \[0-9\]+, marker.*" "breakpoint (A) after the first fork"
 130             gdb_test "continue" \
 131                 "atchpoint \[0-9\]+: var.*Old value = 3.*New value = 4.*after-fork1-A.*" "watchpoint A after the first fork"
 132             gdb_test "continue" \
 133                 "atchpoint \[0-9\]+: var.*Old value = 4.*New value = 5.*after-fork1-B.*" "watchpoint B after the first fork"
 134             gdb_test "continue" \
 135                 "reakpoint \[0-9\]+, marker.*" "breakpoint (A) after the second fork"
 136             gdb_test "continue" \
 137                 "atchpoint \[0-9\]+: var.*Old value = 5.*New value = 6.*after-fork2-A.*" "watchpoint A after the second fork"
 138             gdb_test "continue" \
 139                 "atchpoint \[0-9\]+: var.*Old value = 6.*New value = 7.*after-fork2-B.*" "watchpoint B after the second fork"
 140             gdb_test "continue" "Continuing\\..*\r\nThread .* hit Breakpoint \[0-9\]+, mark_exit .*" "finish"
 141         }
 142     }
 143 }
 144
 145 test parent FOLLOW_PARENT
 146
 147 # Only GNU/Linux is known to support `set follow-fork-mode child'.
 148 if [istarget "*-*-linux*"] {
 149     test child FOLLOW_CHILD
 150 } else {
 151     untested "${testfile}: child"
 152 }