85 lines
2.5 KiB
Plaintext
85 lines
2.5 KiB
Plaintext
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# Copyright 2017-2018 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This file is part of the gdb testsuite.
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# Test that GDB tolerates being started with libSegFault.so preloaded
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# with LD_PRELOAD, and that GDB warns about a custom SIGSEGV custom
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# handler. See PR gdb/18653
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# <https://sourceware.org/bugzilla/show_bug.cgi?id=18653#c7>.
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# We cannot expect remote hosts to see environment variables set on
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# the local machine.
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if { [is_remote host] } {
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unsupported "can't set environment variables on remote host"
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return -1
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}
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# Spawn GDB with LIB preloaded with LD_PRELOAD. CMDLINE_OPTS are
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# command line options passed to GDB.
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proc gdb_spawn_with_ld_preload {lib cmdline_opts} {
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global env
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save_vars { env(LD_PRELOAD) } {
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if { ![info exists env(LD_PRELOAD) ]
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|| $env(LD_PRELOAD) == "" } {
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set env(LD_PRELOAD) "$lib"
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} else {
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append env(LD_PRELOAD) ":$lib"
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}
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gdb_spawn_with_cmdline_opts $cmdline_opts
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}
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}
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proc test_libsegfault {} {
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global gdb_prompt
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set libsegfault "libSegFault.so"
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# When started normally, if libSegFault.so is preloaded, GDB
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# should warn about not being able to propagate the signal
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# disposition of SIGSEGV.
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gdb_exit
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gdb_spawn_with_ld_preload $libsegfault ""
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set test "gdb emits custom handler warning"
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gdb_test_multiple "" $test {
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-re "cannot be preloaded.*\r\n$gdb_prompt $" {
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# Glibc 2.22 outputs:
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# ERROR: ld.so: object 'libSegFault.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
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untested "cannot preload libSegFault.so"
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return
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}
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-re "Found custom handler.*won't be propagated.*\r\n$gdb_prompt $" {
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pass $test
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}
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}
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# "-q" should disable the warning, though.
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gdb_exit
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gdb_spawn_with_ld_preload $libsegfault "-q"
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set test "quiet suppresses custom handler warning"
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gdb_test_multiple "" $test {
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-re "^$gdb_prompt $" {
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pass $test
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}
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}
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}
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test_libsegfault
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