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tests: set MALLOC_PERTURB_ to expose memory bugs

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glibc wipes malloc(3) memory when the MALLOC_PERTURB_ environment
variable is set.  The value of the environment variable determines the
bit pattern used to wipe memory.  For more information, see
http://udrepper.livejournal.com/11429.html.

Set MALLOC_PERTURB_ for gtester and qemu-iotests.  Note we pick a random
value from 1 to 255 to expose more bugs.  If you need to reproduce a
crash use 'show environment' in gdb to extract the MALLOC_PERTURB_
value from a core dump.

Both make check and qemu-iotests pass with MALLOC_PERTURB_ enabled.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1369661331-28041-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Stefan Hajnoczi 2013-05-27 15:28:51 +02:00 committed by Anthony Liguori
parent dafb82e0fc
commit 0412960617
2 changed files with 6 additions and 2 deletions
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5
tests/Makefile
View File

@ -171,6 +171,7 @@ GCOV_OPTIONS = -n $(if $(V),-f,)
$(patsubst %, check-qtest-%, $(QTEST_TARGETS)): check-qtest-%: $(check-qtest-y)
$(if $(CONFIG_GCOV),@rm -f *.gcda */*.gcda */*/*.gcda */*/*/*.gcda,)
$(call quiet-command,QTEST_QEMU_BINARY=$*-softmmu/qemu-system-$* \
MALLOC_PERTURB_=$${MALLOC_PERTURB_:-$$((RANDOM % 255 + 1))} \
gtester $(GTESTER_OPTIONS) -m=$(SPEED) $(check-qtest-$*-y),"GTESTER $@")
$(if $(CONFIG_GCOV),@for f in $(gcov-files-$*-y); do \
echo Gcov report for $$f:;\
@ -180,7 +181,9 @@ $(patsubst %, check-qtest-%, $(QTEST_TARGETS)): check-qtest-%: $(check-qtest-y)
.PHONY: $(patsubst %, check-%, $(check-unit-y))
$(patsubst %, check-%, $(check-unit-y)): check-%: %
$(if $(CONFIG_GCOV),@rm -f *.gcda */*.gcda */*/*.gcda */*/*/*.gcda,)
$(call quiet-command,gtester $(GTESTER_OPTIONS) -m=$(SPEED) $*,"GTESTER $*")
$(call quiet-command, \
MALLOC_PERTURB_=$${MALLOC_PERTURB_:-$$((RANDOM % 255 + 1))} \
gtester $(GTESTER_OPTIONS) -m=$(SPEED) $*,"GTESTER $*")
$(if $(CONFIG_GCOV),@for f in $(gcov-files-$(subst tests/,,$*)-y); do \
echo Gcov report for $$f:;\
$(GCOV) $(GCOV_OPTIONS) $$f -o `dirname $$f`; \

1
tests/qemu-iotests/check
View File

@ -214,6 +214,7 @@ do
start=`_wallclock`
$timestamp && echo -n " ["`date "+%T"`"]"
[ ! -x $seq ] && chmod u+x $seq # ensure we can run it
MALLOC_PERTURB_=${MALLOC_PERTURB_:-$(($RANDOM % 255 + 1))} \
./$seq >$tmp.out 2>&1
sts=$?
$timestamp && _timestamp