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Re: [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by th
From: |
Kamil Rytarowski |
Subject: |
Re: [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by the shell |
Date: |
Fri, 14 Jul 2017 13:27:14 +0200 |
User-agent: |
Mozilla/5.0 (X11; NetBSD amd64; rv:52.0) Gecko/20100101 Thunderbird/52.1.0 |
On 14.07.2017 12:45, Peter Maydell wrote:
> 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.
This is supported on other shells like ksh (Korn Shell), but still as an
extension.
> With dash the shell doesn't complain, it just effectively
> always evaluates $RANDOM to 0:
> echo $((RANDOM + 32768)) => 32768
>
> However, on NetBSD the shell will complain:
> "-sh: arith: syntax error: "RANDOM + 32768"
>
I will make sure whether this behavior is correct in our sh(1).
> which means that "make check" fails.
>
> Switch to using "${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.
>
> Suggested-by: Eric Blake <address@hidden>
> Signed-off-by: Peter Maydell <address@hidden>
Reviewed-by: Kamil Rytarowski <address@hidden>
> ---
> tests/Makefile.include | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tests/Makefile.include b/tests/Makefile.include
> index 6d6cb74..f6310d2 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:;\
>
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- [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by the shell, Peter Maydell, 2017/07/14
- Re: [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by the shell,
Kamil Rytarowski <=
- Re: [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by the shell, Fam Zheng, 2017/07/14
- Re: [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by the shell, Eric Blake, 2017/07/14
- Re: [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by the shell, Stefan Hajnoczi, 2017/07/17
- Re: [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by the shell, Markus Armbruster, 2017/07/20
- Re: [Qemu-devel] [PATCH] tests: Handle $RANDOM not being supported by the shell, Peter Maydell, 2017/07/20