gdb/testsuite/gdb.python/py-breakpoint-create-fail.exp

   1 # Copyright (C) 2016-2024 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 # This file is part of the GDB testsuite.  It tests proper handling for
  17 # breakpoint creation failure.
  18
  19 load_lib gdb-python.exp
  20
  21 require allow_python_tests
  22
  23 standard_testfile
  24
  25 if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] } {
  26     return -1
  27 }
  28
  29 clean_restart "${testfile}"
  30 if ![runto_main] {
  31     return
  32 }
  33
  34 # The following will create a breakpoint Python wrapper whose construction will
  35 # abort: the requested symbol is not defined.  GDB should not keep a reference
  36 # to the wrapper; however it used to...
  37 gdb_test "source py-breakpoint-create-fail.py"
  38
  39 # ... and when it did, as a result, the following breakpoint creation (not
  40 # initiated by the Python API) would dereference the already-freed Python
  41 # breakpoint wrapper, resulting in undefined behavior, sometimes observed as a
  42 # gdb crash, and other times causing the next stop to invoke the Python wrapper
  43 # "stop" method for the object that is not supposed to exist.
  44 gdb_test "break foo"
  45
  46 set test "continuing to foo"
  47 gdb_test_multiple "continue" "$test" {
  48     -re "MyBP\.stop was invoked\!.*$gdb_prompt $" {
  49         fail "$test"
  50     }
  51     -re "Continuing.*Breakpoint 2, foo.*$gdb_prompt $" {
  52         pass "$test"
  53     }
  54 }