binutils-gdb/gdb/testsuite/gdb.dwarf2/dw2-stack-boundary.exp
Tom Tromey 6e195444fb Fix latent bug in DWARF test case
On my branch that replaces the DWARF psymtab reader,
dw2-stack-boundary.exp started failing.  However, when I look at the
output in gdb.log, it is correct:

    file /home/tromey/gdb/build/gdb/testsuite/outputs/gdb.dwarf2/dw2-stack-boundary/dw2-stack-boundary
    Reading symbols from /home/tromey/gdb/build/gdb/testsuite/outputs/gdb.dwarf2/dw2-stack-boundary/dw2-stack-boundary...
    During symbol reading: location description stack overflow
    During symbol reading: location description stack underflow

What happens to cause the failure is that the two branches in
gdb_test_multiple appear in this order:

    -re "\r\nDuring symbol reading: location description stack underflow" {
    [...]
    -re "\r\nDuring symbol reading: location description stack overflow" {

The first one will match the above, without causing the second one to
ever match -- leading to a spurious failure.

Anchoring the regexps seems to fix the problem, and works for the
current gdb as well.
2021-10-31 11:35:28 -06:00

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# Copyright 2010-2021 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
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# 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 <http://www.gnu.org/licenses/>.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
if {![dwarf2_support]} {
return 0
}
standard_testfile .S
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" object {}] != "" } {
return -1
}
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
# From gdb_file_cmd:
if [is_remote host] {
set arg [remote_download host $binfile]
if { $arg == "" } {
perror "download failed"
return -1
}
}
gdb_test_no_output "set complaints 100"
set w1 0
set w2 0
gdb_test_multiple "file $binfile" "file command" {
-re "\r\nReading symbols from \[^\r\n\]*\\.\\.\\." {
exp_continue
}
-re "^\r\nDuring symbol reading: location description stack underflow" {
set w1 1
exp_continue
}
-re "^\r\nDuring symbol reading: location description stack overflow" {
set w2 1
exp_continue
}
-re -wrap "" {
pass $gdb_test_name
}
}
set readnow_p [readnow]
if { $readnow_p } {
setup_kfail "gdb/26796" *-*-*
}
gdb_assert {$w1 && $w2}
gdb_test "p underflow" {Asked for position 0 of stack, stack only has 0 elements on it\.}
gdb_test "p overflow" " = 2"