gdb/testsuite/gdb.base/share-psymtabs-bt.exp

   1 # Copyright 2020-2024 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 # Test that a backtrace is shown correctly for an objfile that uses partial
  17 # symtabs created by another objfile sharing the same BFD.
  18 #
  19 # It mimics how a bug with psymtab sharing was initially found:
  20 #
  21 #  1. Load the test file twice, such that the second objfile re-uses the
  22 #     per_bfd object created for the first objfile.
  23 #  2. Run to some point where in the backtrace there is a frame for a
  24 #     function that's in a CU that's not yet read in.
  25 #  3. Check that this frame's information is complete in the "backtrace"
  26 #     output.
  27
  28 standard_testfile .c share-psymtabs-bt-2.c
  29
  30 if { [prepare_for_testing "failed to prepare" $testfile "$srcfile $srcfile2" \
  31          {debug}] } {
  32     untested "failed to compile"
  33     return -1
  34 }
  35
  36 # Load $binfile a second time.  The second created objfile will re-use the
  37 # partial symtabs created by the first one.
  38 if { [gdb_file_cmd $binfile] != 0 } {
  39     fail "file command failed"
  40     return -1
  41 }
  42
  43 gdb_breakpoint "bar"
  44 if { ![runto "bar"] } {
  45     return -1
  46 }
  47
  48 # A buggy GDB would fail to find the full symbol associated to this frame's
  49 # address, so would just show "foo ()" (from the minimal symbol).
  50 gdb_test "bt" "foo \\(x=12345\\).*"