gdb/testsuite/gdb.base/watch-before-fork.exp

   1 # Copyright 2021-2023 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 # Regression test for PR gdb/28621.  Test that GDB does not misreport
  17 # a watchpoint hit when a previous watchpoint hit is immediately
  18 # followed by a catchpoint hit.
  19
  20 # This test uses "awatch".
  21 require allow_hw_watchpoint_access_tests
  22
  23 standard_testfile
  24
  25 if {[build_executable "failed to prepare" $testfile $srcfile debug]} {
  26     return
  27 }
  28
  29 # Check that fork catchpoints are supported.  Returns 1 if they are.
  30 # Returns 0 and issues unsupported if they are not supported.  If it
  31 # couldn't be determined, returns 0 (but does not call unsupported).
  32
  33 proc_with_prefix catch_fork_supported {} {
  34     clean_restart $::testfile
  35
  36     if { ![runto_main] } {
  37         return 0
  38     }
  39
  40     # Verify that the system supports "catch fork".
  41     gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint"
  42     set has_fork_catchpoints -1
  43     gdb_test_multiple "continue" "continue to first fork catchpoint" {
  44         -re -wrap ".*Your system does not support this type\r\nof catchpoint.*" {
  45             set has_fork_catchpoints 0
  46             pass $gdb_test_name
  47         }
  48         -re -wrap ".*Catchpoint.*" {
  49             set has_fork_catchpoints 1
  50             pass $gdb_test_name
  51         }
  52     }
  53
  54     if {$has_fork_catchpoints == 1} {
  55         return 1
  56     } elseif {$has_fork_catchpoints == -1} {
  57         return 0
  58     } else {
  59         unsupported "catch fork not supported"
  60         return 0
  61     }
  62 }
  63
  64 # The test proper.
  65
  66 proc_with_prefix test {} {
  67     clean_restart $::testfile
  68
  69     if { ![runto_main] } {
  70         return 0
  71     }
  72
  73     gdb_test "awatch global_var" \
  74         "Hardware access \\(read/write\\) watchpoint .*: global_var.*" \
  75         "watchpoint on global variable"
  76
  77     gdb_test "continue" \
  78         "Hardware access \\(read/write\\) watchpoint .*: global_var.*" \
  79         "continue to watchpoint"
  80
  81     set seen_watchpoint 0
  82     gdb_test_multiple "continue" "continue to catch fork" {
  83         -re "watchpoint" {
  84             set seen_watchpoint 1
  85             exp_continue
  86         }
  87         -re "$::gdb_prompt " {
  88             gdb_assert { !$seen_watchpoint } $gdb_test_name
  89         }
  90     }
  91 }
  92
  93 if {![catch_fork_supported] } {
  94     return
  95 }
  96
  97 test