gdb/testsuite/gdb.base/add-symbol-file-attach.exp

   1 # Copyright (C) 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 # This is a test case for bug 27831:
  17 #
  18 # https://sourceware.org/bugzilla/show_bug.cgi?id=27831
  19 #
  20 # Prior to fixing this bug, GDB could be caused to assert by doing
  21 # the following:  A simple program with a global was started outside
  22 # of GDB.  Once GDB was started, the symbol file was loaded in an
  23 # atypical manner via the 'add-symbol-file' command.  Then, the
  24 # program was attached to via the 'attach' command at which time the
  25 # symbol file was loaded again.  Once attached, printing the global
  26 # variable in the program would trigger the assertion error.
  27 #
  28 # This is what the assert looked like:
  29 #
  30 # gdb/symtab.c:6599: internal-error: get_msymbol_address:
  31 #   Assertion `(objf->flags & OBJF_MAINLINE) == 0' failed.
  32
  33 require can_spawn_for_attach
  34
  35 standard_testfile
  36
  37 if {[build_executable $testfile.exp $testfile $srcfile debug] == -1} {
  38     untested "failed to compile"
  39     return -1
  40 }
  41
  42 # Use 'spawn_wait_for_attach' to start the test program running.  It'll
  43 # also sleep for a short time in order to make sure that it's running
  44 # so that GDB may attach to it.
  45
  46 set test_spawn_id [spawn_wait_for_attach $binfile]
  47 set testpid [spawn_id_get_pid $test_spawn_id]
  48
  49 gdb_start
  50
  51 # Load the symbol file in an atypical manner by using the add-symbol-file
  52 # command.
  53
  54 set test "add-symbol-file before attach"
  55 gdb_test_multiple "add-symbol-file $binfile" $test {
  56     -re "add symbol table from file.*y or n. $" {
  57         send_gdb "y\n"
  58         exp_continue
  59     }
  60     -re -wrap "Reading symbols from .*" {
  61         pass $test
  62     }
  63 }
  64
  65 # Attach to the process started above.  GDB will want to load a "new"
  66 # symbol table, so handle that case.
  67
  68 set test "attach"
  69 gdb_test_multiple "attach $testpid" $test {
  70     -re "Attaching to process.*Load new symbol table.*y or n. $" {
  71         send_gdb "y\n"
  72         exp_continue
  73     }
  74     -re -wrap "Reading symbols from .*" {
  75         pass $test
  76     }
  77 }
  78
  79 # Print out the value of the global.  Prior to fixing bug 27831, GDB
  80 # would assert while executing this command.
  81
  82 gdb_test "print foo" "42"