Files
binutils-gdb/gdb/testsuite/gdb.base/morestack.exp
Jan Kratochvil b8d38ee425 testsuite: Fix false FAIL for gdb.base/morestack.exp
Since
	[commit] [testsuite patch] Fix gcc_compiled for gcc 6 & 7
	https://sourceware.org/ml/gdb-patches/2016-10/msg00620.html

there has started running again
	 Running gdb/testsuite/gdb.base/morestack.exp ...
	+FAIL: gdb.base/morestack.exp: continue
	+PASS: gdb.base/morestack.exp: up 3000

but as you can see it FAILs now - on Fedora 24 x86_64 (although for example it
still PASSes on CentOS-7.2 x86_64).

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff787c7bb in malloc_consolidate (av=av@entry=0x7ffff7bbcb00 <main_arena>) at malloc.c:4181
4181		      unlink(av, nextchunk, bck, fwd);
(gdb) bt
[...]
[...]

This apparently is due to - man gcc - -fsplit-stack:
	When code compiled with -fsplit-stack calls code compiled without
	-fsplit-stack, there may not be much stack space available for the
	latter code to run.  If compiling all code, including library code,
	with -fsplit-stack is not an option, then the linker can fix up these
	calls so that the code compiled without -fsplit-stack always has
	a large stack.  Support for this is implemented in the gold linker in
	GNU binutils release 2.21 and later.

gdb/testsuite/ChangeLog
2016-10-24  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.base/morestack.exp: Try to build it using -fuse-ld=gold first.
2016-10-24 14:13:51 +02:00

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# Copyright (C) 2011-2016 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/>.
if [get_compiler_info] {
return -1
}
if {$gcc_compiled == 0} {
return -1
}
standard_testfile
# -fuse-ld=gold is used for calling printf code built without -fsplit-stack
# which could crash otherwise. See GCC documentation of -fsplit-stack.
set opts "additional_flags=-fsplit-stack"
if { [prepare_for_testing ${testfile}.exp ${testfile} $srcfile [list $opts additional_flags=-fuse-ld=gold]] \
&& [prepare_for_testing ${testfile}.exp ${testfile} $srcfile $opts] } {
return -1
}
if ![runto_main] {
return -1
}
gdb_breakpoint "marker_hit"
gdb_breakpoint "marker_miss"
set test "continue"
gdb_test_multiple $test $test {
-re "marker_hit.*$gdb_prompt $" {
pass $test
}
-re "marker_miss.*$gdb_prompt $" {
# The testcase failed to violated the frame_id_inner condition by
# handing inner frame with higher (on the stack-grows-down arches)
# $sp address than the outer frame.
xfail $test
return 0
}
}
# FAIL was on `bt' producing:
# Backtrace stopped: previous frame inner to this frame (corrupt stack?)
gdb_test "up 3000" " in main .*"