From f289129acf23994b9d1b12e13f28ad98fb8a6e5c Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Fri, 14 Jul 2017 11:13:09 +0100 Subject: tests: Handle $RANDOM not being supported by the shell In various places in our test makefiles and scripts we use the shell $RANDOM to create a random number. This is a bash specific extension, and doesn't work on other shells. With dash the shell doesn't complain, it just effectively always evaluates $RANDOM to 0: echo $((RANDOM + 32768)) => 32768 However, on NetBSD the shell will complain: "-sh: arith: syntax error: "RANDOM + 32768" which means that "make check" fails. Switch to using "${RANDOM:-0}" instead of $RANDOM, which will portably either give us a random number or zero. This means that on non-bash shells we don't get such good test coverage via the MALLOC_PERTURB_ setting, but we were already in that situation for non-bash shells. Our only other uses of $RANDOM (in tests/qemu-iotests/check and tests/qemu-iotests/162) are in shell scripts which use a #!/bin/bash line so they are always run under bash. Signed-off-by: Peter Maydell --- tests/Makefile.include | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tests/Makefile.include b/tests/Makefile.include index 6d6cb74e9a..f6310d21b0 100644 --- a/tests/Makefile.include +++ b/tests/Makefile.include @@ -826,7 +826,7 @@ $(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-$* \ QTEST_QEMU_IMG=qemu-img$(EXESUF) \ - MALLOC_PERTURB_=$${MALLOC_PERTURB_:-$$((RANDOM % 255 + 1))} \ + MALLOC_PERTURB_=$${MALLOC_PERTURB_:-$$(( $${RANDOM:-0} % 255 + 1))} \ gtester $(GTESTER_OPTIONS) -m=$(SPEED) $(check-qtest-$*-y) $(check-qtest-generic-y),"GTESTER","$@") $(if $(CONFIG_GCOV),@for f in $(gcov-files-$*-y) $(gcov-files-generic-y); do \ echo Gcov report for $$f:;\ @@ -837,7 +837,7 @@ $(patsubst %, check-qtest-%, $(QTEST_TARGETS)): check-qtest-%: $(check-qtest-y) $(patsubst %, check-%, $(check-unit-y)): check-%: % $(if $(CONFIG_GCOV),@rm -f *.gcda */*.gcda */*/*.gcda */*/*/*.gcda,) $(call quiet-command, \ - MALLOC_PERTURB_=$${MALLOC_PERTURB_:-$$((RANDOM % 255 + 1))} \ + MALLOC_PERTURB_=$${MALLOC_PERTURB_:-$$(( $${RANDOM:-0} % 255 + 1))} \ gtester $(GTESTER_OPTIONS) -m=$(SPEED) $*,"GTESTER","$*") $(if $(CONFIG_GCOV),@for f in $(gcov-files-$(subst tests/,,$*)-y) $(gcov-files-generic-y); do \ echo Gcov report for $$f:;\ -- cgit v1.2.3