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# Copyright 2020-2021 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <>.
# Test that a backtrace is shown correctly for an objfile that uses partial
# symtabs created by another objfile sharing the same BFD.
# It mimics how a bug with psymtab sharing was initially found:
# 1. Load the test file twice, such that the second objfile re-uses the
# per_bfd object created for the first objfile.
# 2. Run to some point where in the backtrace there is a frame for a
# function that's in a CU that's not yet read in.
# 3. Check that this frame's information is complete in the "backtrace"
# output.
standard_testfile .c share-psymtabs-bt-2.c
if { [prepare_for_testing "failed to prepare" $testfile "$srcfile $srcfile2" \
{debug}] } {
untested "failed to compile"
return -1
# Load $binfile a second time. The second created objfile will re-use the
# partial symtabs created by the first one.
if { [gdb_file_cmd $binfile] != 0 } {
fail "file command failed"
return -1
gdb_breakpoint "bar"
if { ![runto "bar"] } {
return -1
# A buggy GDB would fail to find the full symbol associated to this frame's
# address, so would just show "foo ()" (from the minimal symbol).
gdb_test "bt" "foo \\(x=12345\\).*"