- Linux-kselftest-mirror - lists.linaro.org

[PATCH AUTOSEL 5.19 15/40] kselftest/arm64: Allow larger buffers in get_signal_context()

by Sasha Levin

From: Mark Brown <broonie(a)kernel.org> [ Upstream commit 38150a6204c731a4846786682e500d132571fd82 ] In order to allow testing of signal contexts that overflow the base signal frame allow callers to pass the buffer size for the user context into get_signal_context(). No functional change. Signed-off-by: Mark Brown <broonie(a)kernel.org> Link: https://lore.kernel.org/r/20220829160703.874492-10-broonie@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/arm64/signal/test_signals_utils.h | 5 +++-- .../arm64/signal/testcases/fake_sigreturn_bad_magic.c | 2 +- .../arm64/signal/testcases/fake_sigreturn_bad_size.c | 2 +- .../signal/testcases/fake_sigreturn_bad_size_for_magic0.c | 2 +- .../signal/testcases/fake_sigreturn_duplicated_fpsimd.c | 2 +- .../arm64/signal/testcases/fake_sigreturn_misaligned_sp.c | 2 +- .../arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c | 2 +- .../arm64/signal/testcases/fake_sigreturn_sme_change_vl.c | 2 +- .../arm64/signal/testcases/fake_sigreturn_sve_change_vl.c | 2 +- tools/testing/selftests/arm64/signal/testcases/sme_vl.c | 2 +- tools/testing/selftests/arm64/signal/testcases/ssve_regs.c | 2 +- tools/testing/selftests/arm64/signal/testcases/sve_regs.c | 2 +- tools/testing/selftests/arm64/signal/testcases/sve_vl.c | 2 +- tools/testing/selftests/arm64/signal/testcases/za_regs.c | 2 +- 14 files changed, 16 insertions(+), 15 deletions(-) diff --git a/tools/testing/selftests/arm64/signal/test_signals_utils.h b/tools/testing/selftests/arm64/signal/test_signals_utils.h index f3aa99ba67bb..222093f51b67 100644 --- a/tools/testing/selftests/arm64/signal/test_signals_utils.h +++ b/tools/testing/selftests/arm64/signal/test_signals_utils.h @@ -56,7 +56,8 @@ static inline bool feats_ok(struct tdescr *td) * at sizeof(ucontext_t). */ static __always_inline bool get_current_context(struct tdescr *td, - ucontext_t *dest_uc) + ucontext_t *dest_uc, + size_t dest_sz) { static volatile bool seen_already; @@ -64,7 +65,7 @@ static __always_inline bool get_current_context(struct tdescr *td, /* it's a genuine invocation..reinit */ seen_already = 0; td->live_uc_valid = 0; - td->live_sz = sizeof(*dest_uc); + td->live_sz = dest_sz; memset(dest_uc, 0x00, td->live_sz); td->live_uc = dest_uc; /* diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_magic.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_magic.c index 8dc600a7d4fd..8c7f00ea9823 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_magic.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_magic.c @@ -21,7 +21,7 @@ static int fake_sigreturn_bad_magic_run(struct tdescr *td, struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head; /* just to fill the ucontext_t with something real */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; /* need at least 2*HDR_SZ space: KSFT_BAD_MAGIC + terminator. */ diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size.c index b3c362100666..1c03f6b638e0 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size.c @@ -24,7 +24,7 @@ static int fake_sigreturn_bad_size_run(struct tdescr *td, struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head; /* just to fill the ucontext_t with something real */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c index a44b88bfc81a..bc22f64b544e 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c @@ -21,7 +21,7 @@ static int fake_sigreturn_bad_size_for_magic0_run(struct tdescr *td, struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head; /* just to fill the ucontext_t with something real */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; /* at least HDR_SZ for the badly sized terminator. */ diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c index afe8915f0998..63e3906b631c 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c @@ -21,7 +21,7 @@ static int fake_sigreturn_duplicated_fpsimd_run(struct tdescr *td, struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head; /* just to fill the ucontext_t with something real */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; head = get_starting_head(shead, sizeof(struct fpsimd_context) + HDR_SZ, diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned_sp.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned_sp.c index 1e089e66f9f3..d00625ff12c2 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned_sp.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned_sp.c @@ -19,7 +19,7 @@ static int fake_sigreturn_misaligned_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc) { /* just to fill the ucontext_t with something real */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; /* Forcing sigframe on misaligned SP (16 + 3) */ diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c index 08ecd8073a1a..f805138cb20d 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c @@ -23,7 +23,7 @@ static int fake_sigreturn_missing_fpsimd_run(struct tdescr *td, struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf); /* just to fill the ucontext_t with something real */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c index 7ed762b7202f..ebd5815b54bb 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sme_change_vl.c @@ -54,7 +54,7 @@ static int fake_sigreturn_ssve_change_vl(struct tdescr *td, struct sve_context *sve; /* Get a signal context with a SME ZA frame in it */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c index 915821375b0a..e2a452190511 100644 --- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c @@ -56,7 +56,7 @@ static int fake_sigreturn_sve_change_vl(struct tdescr *td, struct sve_context *sve; /* Get a signal context with a SVE frame in it */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); diff --git a/tools/testing/selftests/arm64/signal/testcases/sme_vl.c b/tools/testing/selftests/arm64/signal/testcases/sme_vl.c index 13ff3b35cbaf..75f387f2db81 100644 --- a/tools/testing/selftests/arm64/signal/testcases/sme_vl.c +++ b/tools/testing/selftests/arm64/signal/testcases/sme_vl.c @@ -34,7 +34,7 @@ static int sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc) struct za_context *za; /* Get a signal context which should have a ZA frame in it */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); diff --git a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c index 9022a6cab4b3..71f14632c524 100644 --- a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c @@ -73,7 +73,7 @@ static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, * in it. */ setup_ssve_regs(); - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); diff --git a/tools/testing/selftests/arm64/signal/testcases/sve_regs.c b/tools/testing/selftests/arm64/signal/testcases/sve_regs.c index 4b2418aa08a9..4cdedb706786 100644 --- a/tools/testing/selftests/arm64/signal/testcases/sve_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/sve_regs.c @@ -71,7 +71,7 @@ static int do_one_sve_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, * in it. */ setup_sve_regs(); - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); diff --git a/tools/testing/selftests/arm64/signal/testcases/sve_vl.c b/tools/testing/selftests/arm64/signal/testcases/sve_vl.c index 92904653add1..aa835acec062 100644 --- a/tools/testing/selftests/arm64/signal/testcases/sve_vl.c +++ b/tools/testing/selftests/arm64/signal/testcases/sve_vl.c @@ -34,7 +34,7 @@ static int sve_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc) struct sve_context *sve; /* Get a signal context which should have a SVE frame in it */ - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); diff --git a/tools/testing/selftests/arm64/signal/testcases/za_regs.c b/tools/testing/selftests/arm64/signal/testcases/za_regs.c index b94e4f99fcac..70c00ca6eded 100644 --- a/tools/testing/selftests/arm64/signal/testcases/za_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/za_regs.c @@ -71,7 +71,7 @@ static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, * in it. */ setup_za_regs(); - if (!get_current_context(td, &sf.uc)) + if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) return 1; resv_sz = GET_SF_RESV_SIZE(sf); -- 2.35.1

2 years, 8 months

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[PATCH AUTOSEL 5.19 14/40] kselftest/arm64: Fix validatation termination record after EXTRA_CONTEXT

by Sasha Levin

From: Mark Brown <broonie(a)kernel.org> [ Upstream commit 5c152c2f66f9368394b89ac90dc7483476ef7b88 ] When arm64 signal context data overflows the base struct sigcontext it gets placed in an extra buffer pointed to by a record of type EXTRA_CONTEXT in the base struct sigcontext which is required to be the last record in the base struct sigframe. The current validation code attempts to check this by using GET_RESV_NEXT_HEAD() to step forward from the current record to the next but that is a macro which assumes it is being provided with a struct _aarch64_ctx and uses the size there to skip forward to the next record. Instead validate_extra_context() passes it a struct extra_context which has a separate size field. This compiles but results in us trying to validate a termination record in completely the wrong place, at best failing validation and at worst just segfaulting. Fix this by passing the struct _aarch64_ctx we meant to into the macro. Signed-off-by: Mark Brown <broonie(a)kernel.org> Link: https://lore.kernel.org/r/20220829160703.874492-4-broonie@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/arm64/signal/testcases/testcases.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/arm64/signal/testcases/testcases.c b/tools/testing/selftests/arm64/signal/testcases/testcases.c index 84c36bee4d82..d98828cb542b 100644 --- a/tools/testing/selftests/arm64/signal/testcases/testcases.c +++ b/tools/testing/selftests/arm64/signal/testcases/testcases.c @@ -33,7 +33,7 @@ bool validate_extra_context(struct extra_context *extra, char **err) return false; fprintf(stderr, "Validating EXTRA...\n"); - term = GET_RESV_NEXT_HEAD(extra); + term = GET_RESV_NEXT_HEAD(&extra->head); if (!term || term->magic || term->size) { *err = "Missing terminator after EXTRA context"; return false; -- 2.35.1

2 years, 8 months

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[PATCH AUTOSEL 6.0 46/46] selftests/cpu-hotplug: Use return instead of exit

by Sasha Levin

From: Zhao Gongyi <zhaogongyi(a)huawei.com> [ Upstream commit 972cf4ce51ef5532d56822af17defb148aac0ccb ] Some cpus will be left in offline state when online function exits in some error conditions. Use return instead of exit to fix it. Signed-off-by: Zhao Gongyi <zhaogongyi(a)huawei.com> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- .../selftests/cpu-hotplug/cpu-on-off-test.sh | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh b/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh index 0d26b5e3f966..940b68c940bb 100755 --- a/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh +++ b/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh @@ -4,6 +4,7 @@ SYSFS= # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 +retval=0 prerequisite() { @@ -102,10 +103,10 @@ online_cpu_expect_success() if ! online_cpu $cpu; then echo $FUNCNAME $cpu: unexpected fail >&2 - exit 1 + retval=1 elif ! cpu_is_online $cpu; then echo $FUNCNAME $cpu: unexpected offline >&2 - exit 1 + retval=1 fi } @@ -128,10 +129,10 @@ offline_cpu_expect_success() if ! offline_cpu $cpu; then echo $FUNCNAME $cpu: unexpected fail >&2 - exit 1 + retval=1 elif ! cpu_is_offline $cpu; then echo $FUNCNAME $cpu: unexpected offline >&2 - exit 1 + retval=1 fi } @@ -201,7 +202,7 @@ if [ $allcpus -eq 0 ]; then offline_cpu_expect_success $present_max online_cpu $present_max fi - exit 0 + exit $retval else echo "Full scope test: all hotplug cpus" echo -e "\t online all offline cpus" @@ -291,3 +292,5 @@ done echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error /sbin/modprobe -q -r cpu-notifier-error-inject + +exit $retval -- 2.35.1

2 years, 8 months

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[PATCH AUTOSEL 6.0 14/46] kselftest/arm64: Fix validatation termination record after EXTRA_CONTEXT

by Sasha Levin

From: Mark Brown <broonie(a)kernel.org> [ Upstream commit 5c152c2f66f9368394b89ac90dc7483476ef7b88 ] When arm64 signal context data overflows the base struct sigcontext it gets placed in an extra buffer pointed to by a record of type EXTRA_CONTEXT in the base struct sigcontext which is required to be the last record in the base struct sigframe. The current validation code attempts to check this by using GET_RESV_NEXT_HEAD() to step forward from the current record to the next but that is a macro which assumes it is being provided with a struct _aarch64_ctx and uses the size there to skip forward to the next record. Instead validate_extra_context() passes it a struct extra_context which has a separate size field. This compiles but results in us trying to validate a termination record in completely the wrong place, at best failing validation and at worst just segfaulting. Fix this by passing the struct _aarch64_ctx we meant to into the macro. Signed-off-by: Mark Brown <broonie(a)kernel.org> Link: https://lore.kernel.org/r/20220829160703.874492-4-broonie@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/arm64/signal/testcases/testcases.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/arm64/signal/testcases/testcases.c b/tools/testing/selftests/arm64/signal/testcases/testcases.c index 84c36bee4d82..d98828cb542b 100644 --- a/tools/testing/selftests/arm64/signal/testcases/testcases.c +++ b/tools/testing/selftests/arm64/signal/testcases/testcases.c @@ -33,7 +33,7 @@ bool validate_extra_context(struct extra_context *extra, char **err) return false; fprintf(stderr, "Validating EXTRA...\n"); - term = GET_RESV_NEXT_HEAD(extra); + term = GET_RESV_NEXT_HEAD(&extra->head); if (!term || term->magic || term->size) { *err = "Missing terminator after EXTRA context"; return false; -- 2.35.1

2 years, 8 months

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[PATCH] selftests/perf_events: Add a SIGTRAP stress test with disables

by Marco Elver

Add a SIGTRAP stress test that exercises repeatedly enabling/disabling an event while it concurrently keeps firing. Link: https://lore.kernel.org/all/Y0E3uG7jOywn7vy3@elver.google.com/ Signed-off-by: Marco Elver <elver(a)google.com> --- .../selftests/perf_events/sigtrap_threads.c | 35 +++++++++++++++++-- 1 file changed, 32 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/perf_events/sigtrap_threads.c b/tools/testing/selftests/perf_events/sigtrap_threads.c index 6d849dc2bee0..d1d8483ac628 100644 --- a/tools/testing/selftests/perf_events/sigtrap_threads.c +++ b/tools/testing/selftests/perf_events/sigtrap_threads.c @@ -62,6 +62,8 @@ static struct perf_event_attr make_event_attr(bool enabled, volatile void *addr, .remove_on_exec = 1, /* Required by sigtrap. */ .sigtrap = 1, /* Request synchronous SIGTRAP on event. */ .sig_data = TEST_SIG_DATA(addr, id), + .exclude_kernel = 1, /* To allow */ + .exclude_hv = 1, /* running as !root */ }; return attr; } @@ -93,9 +95,13 @@ static void *test_thread(void *arg) __atomic_fetch_add(&ctx.tids_want_signal, tid, __ATOMIC_RELAXED); iter = ctx.iterate_on; /* read */ - for (i = 0; i < iter - 1; i++) { - __atomic_fetch_add(&ctx.tids_want_signal, tid, __ATOMIC_RELAXED); - ctx.iterate_on = iter; /* idempotent write */ + if (iter >= 0) { + for (i = 0; i < iter - 1; i++) { + __atomic_fetch_add(&ctx.tids_want_signal, tid, __ATOMIC_RELAXED); + ctx.iterate_on = iter; /* idempotent write */ + } + } else { + while (ctx.iterate_on); } return NULL; @@ -208,4 +214,27 @@ TEST_F(sigtrap_threads, signal_stress) EXPECT_EQ(ctx.first_siginfo.si_perf_data, TEST_SIG_DATA(&ctx.iterate_on, 0)); } +TEST_F(sigtrap_threads, signal_stress_with_disable) +{ + const int target_count = NUM_THREADS * 3000; + int i; + + ctx.iterate_on = -1; + + EXPECT_EQ(ioctl(self->fd, PERF_EVENT_IOC_ENABLE, 0), 0); + pthread_barrier_wait(&self->barrier); + while (__atomic_load_n(&ctx.signal_count, __ATOMIC_RELAXED) < target_count) { + EXPECT_EQ(ioctl(self->fd, PERF_EVENT_IOC_DISABLE, 0), 0); + EXPECT_EQ(ioctl(self->fd, PERF_EVENT_IOC_ENABLE, 0), 0); + } + ctx.iterate_on = 0; + for (i = 0; i < NUM_THREADS; i++) + ASSERT_EQ(pthread_join(self->threads[i], NULL), 0); + EXPECT_EQ(ioctl(self->fd, PERF_EVENT_IOC_DISABLE, 0), 0); + + EXPECT_EQ(ctx.first_siginfo.si_addr, &ctx.iterate_on); + EXPECT_EQ(ctx.first_siginfo.si_perf_type, PERF_TYPE_BREAKPOINT); + EXPECT_EQ(ctx.first_siginfo.si_perf_data, TEST_SIG_DATA(&ctx.iterate_on, 0)); +} + TEST_HARNESS_MAIN -- 2.38.0.rc1.362.ged0d419d3c-goog

2 years, 8 months

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Re: tools/nolibc: fix missing strlen() definition and infinite loop with gcc-12

by Alexey Dobriyan

Willy Tarreau wrote: > +#if defined(__GNUC__) && (__GNUC__ >= 12) > +__attribute__((optimize("no-tree-loop-distribute-patterns"))) > +#endif > static __attribute__((unused)) > -size_t nolibc_strlen(const char *str I'd suggest to use asm("") in the loop body. It worked in the past to prevent folding division loop back into division instruction. Or switch to size_t f(const char *s) { const char *s0 = s; while (*s++) ; return s - s0 - 1; } which compiles to 1 branch, not 2. But of course they could recognise this pattern too.

2 years, 8 months

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[PATCH] Documentation: Kunit: Update architecture.rst for minor fixes

by Sadiya Kazi

Updated the architecture.rst page with the following changes: -Add missing article _the_ across the document. -Reword content across for style and standard. -Upate all occurrences of Command Line to Command-line across the document. -Correct grammatical issues, for example - added _it_wherever missing. -Update all occurrences of _via_ to either use _through_ or _using_. -Update the text preceding the external links and pushed the full link to a new line for better readability. -Reword content under the config command to make it more clear and concise. Signed-off-by: Sadiya Kazi <sadiyakazi(a)google.com> --- .../dev-tools/kunit/architecture.rst | 86 ++++++++++--------- 1 file changed, 45 insertions(+), 41 deletions(-) diff --git a/Documentation/dev-tools/kunit/architecture.rst b/Documentation/dev-tools/kunit/architecture.rst index 8efe792bdcb9..1736c37c33f2 100644 --- a/Documentation/dev-tools/kunit/architecture.rst +++ b/Documentation/dev-tools/kunit/architecture.rst @@ -4,16 +4,17 @@ KUnit Architecture ================== -The KUnit architecture can be divided into two parts: +The KUnit architecture is divided into two parts: - `In-Kernel Testing Framework`_ -- `kunit_tool (Command Line Test Harness)`_ +- `kunit_tool (Command-line Test Harness)`_ In-Kernel Testing Framework =========================== The kernel testing library supports KUnit tests written in C using -KUnit. KUnit tests are kernel code. KUnit does several things: +KUnit. KUnit tests are written in the kernel code. KUnit performs the following +tasks: - Organizes tests - Reports test results @@ -22,8 +23,8 @@ KUnit. KUnit tests are kernel code. KUnit does several things: Test Cases ---------- -The fundamental unit in KUnit is the test case. The KUnit test cases are -grouped into KUnit suites. A KUnit test case is a function with type +The test case is the fundamental unit in KUnit. KUnit test cases are organised +into suites. A KUnit test case is a function with type signature ``void (*)(struct kunit *test)``. These test case functions are wrapped in a struct called struct kunit_case. @@ -31,8 +32,8 @@ struct kunit_case. .. note: ``generate_params`` is optional for non-parameterized tests. -Each KUnit test case gets a ``struct kunit`` context -object passed to it that tracks a running test. The KUnit assertion +Each KUnit test case receives a ``struct kunit`` context object that tracks a +running test. The KUnit assertion macros and other KUnit utilities use the ``struct kunit`` context object. As an exception, there are two fields: @@ -77,11 +78,12 @@ Executor The KUnit executor can list and run built-in KUnit tests on boot. The Test suites are stored in a linker section -called ``.kunit_test_suites``. For code, see: +called ``.kunit_test_suites``. For code, see the following link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/inc…. + The linker section consists of an array of pointers to ``struct kunit_suite``, and is populated by the ``kunit_test_suites()`` -macro. To run all tests compiled into the kernel, the KUnit executor +macro. To run all the compiled tests into the kernel, the KUnit executor iterates over the linker section array. .. kernel-figure:: kunit_suitememorydiagram.svg @@ -90,8 +92,8 @@ iterates over the linker section array. KUnit Suite Memory Diagram On the kernel boot, the KUnit executor uses the start and end addresses -of this section to iterate over and run all tests. For code, see: -https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/kunit/executor.c +of this section to iterate over and run all tests. For code, see the following link: +https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/kunit/executor.c. When built as a module, the ``kunit_test_suites()`` macro defines a ``module_init()`` function, which runs all the tests in the compilation @@ -99,46 +101,48 @@ unit instead of utilizing the executor. In KUnit tests, some error classes do not affect other tests or parts of the kernel, each KUnit case executes in a separate thread -context. For code, see: +context. For code, see the following link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib… Assertion Macros ---------------- -KUnit tests verify state using expectations/assertions. +KUnit tests verify the state using expectations/assertions. All expectations/assertions are formatted as: ``KUNIT_{EXPECT|ASSERT}_<op>[_MSG](kunit, property[, message])`` - ``{EXPECT|ASSERT}`` determines whether the check is an assertion or an expectation. - - For an expectation, if the check fails, marks the test as failed + - For an expectation, if the check fails, it marks the test as failed and logs the failure. - An assertion, on failure, causes the test case to terminate immediately. - - Assertions call function: + - Assertion calls the function: ``void __noreturn kunit_abort(struct kunit *)``. - - ``kunit_abort`` calls function: + - ``kunit_abort`` calls the function: ``void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch)``. - - ``kunit_try_catch_throw`` calls function: + - ``kunit_try_catch_throw`` calls the function: ``void kthread_complete_and_exit(struct completion *, long) __noreturn;`` and terminates the special thread context. - ``<op>`` denotes a check with options: ``TRUE`` (supplied property - has the boolean value “true”), ``EQ`` (two supplied properties are + has the boolean value "true"), ``EQ`` (two supplied properties are equal), ``NOT_ERR_OR_NULL`` (supplied pointer is not null and does not - contain an “err” value). + contain an "err" value). - ``[_MSG]`` prints a custom message on failure. Test Result Reporting --------------------- -KUnit prints test results in KTAP format. KTAP is based on TAP14, see: +KUnit prints the test results in KTAP format. +KTAP is based on TAP14, see: https://github.com/isaacs/testanything.github.io/blob/tap14/tap-version-14-…. + KTAP (yet to be standardized format) works with KUnit and Kselftest. The KUnit executor prints KTAP results to dmesg, and debugfs (if configured). @@ -151,32 +155,32 @@ parameters. The test is invoked multiple times, once for each parameter value and the parameter is stored in the ``param_value`` field. The test case includes a KUNIT_CASE_PARAM() macro that accepts a generator function. -The generator function is passed the previous parameter and returns the next -parameter. It also provides a macro to generate common-case generators based on -arrays. +The previous parameter is passed to the generator function, which returns +the next parameter. It also includes a macro for generating array-based +common-case generators. -kunit_tool (Command Line Test Harness) +kunit_tool (Command-line Test Harness) ====================================== -kunit_tool is a Python script ``(tools/testing/kunit/kunit.py)`` -that can be used to configure, build, exec, parse and run (runs other -commands in order) test results. You can either run KUnit tests using -kunit_tool or can include KUnit in kernel and parse manually. +``kunit_tool`` is a Python script, found in ``tools/testing/kunit/kunit.py``. It +is used to configure, build, execute, parse, and run (other commands in order) +test results. You have two options for running KUnit tests: either include KUnit +in the kernel and parse manually, or use the ``kunit_tool``. - ``configure`` command generates the kernel ``.config`` from a ``.kunitconfig`` file (and any architecture-specific options). - For some architectures, additional config options are specified in the - ``qemu_config`` Python script - (For example: ``tools/testing/kunit/qemu_configs/powerpc.py``). + The Python script available in ``qemu_configs`` folder + (for example, ``tools/testing/kunit/qemu configs/powerpc.py``) contains + additional configuration options for specific architectures. It parses both the existing ``.config`` and the ``.kunitconfig`` files - and ensures that ``.config`` is a superset of ``.kunitconfig``. - If this is not the case, it will combine the two and run - ``make olddefconfig`` to regenerate the ``.config`` file. It then - verifies that ``.config`` is now a superset. This checks if all - Kconfig dependencies are correctly specified in ``.kunitconfig``. - ``kunit_config.py`` includes the parsing Kconfigs code. The code which - runs ``make olddefconfig`` is a part of ``kunit_kernel.py``. You can - invoke this command via: ``./tools/testing/kunit/kunit.py config`` and + to ensure that ``.config`` is a superset of ``.kunitconfig``. + If not, it will combine the two and execute ``make olddefconfig`` to regenerate + the ``.config`` file. It then checks to see if ``.config`` has become a superset. + This verifies that all the Kconfig dependencies are correctly specified in the file + ``.kunitconfig``. The + ``kunit_config.py`` script contains the code for parsing Kconfigs. The code which + runs ``make olddefconfig`` is part of the ``kunit_kernel.py`` script. You can + invoke this command through: ``./tools/testing/kunit/kunit.py config`` and generate a ``.config`` file. - ``build`` runs ``make`` on the kernel tree with required options (depends on the architecture and some options, for example: build_dir) @@ -184,8 +188,8 @@ kunit_tool or can include KUnit in kernel and parse manually. To build a KUnit kernel from the current ``.config``, you can use the ``build`` argument: ``./tools/testing/kunit/kunit.py build``. - ``exec`` command executes kernel results either directly (using - User-mode Linux configuration), or via an emulator such - as QEMU. It reads results from the log via standard + User-mode Linux configuration), or through an emulator such + as QEMU. It reads results from the log using standard output (stdout), and passes them to ``parse`` to be parsed. If you already have built a kernel with built-in KUnit tests, you can run the kernel and display the test results with the ``exec`` -- 2.38.0.rc1.362.ged0d419d3c-goog

2 years, 8 months

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[PATCH -next] selftests/memory-hotplug: Remove the redundant warning information

by Zhao Gongyi

Remove the redundant warning information of online_all_offline_memory() since there is a warning in online_memory_expect_success(). Signed-off-by: Zhao Gongyi <zhaogongyi(a)huawei.com> --- tools/testing/selftests/memory-hotplug/mem-on-off-test.sh | 1 - 1 file changed, 1 deletion(-) diff --git a/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh b/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh index 74ee5067a8ce..611be86eaf3d 100755 --- a/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh +++ b/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh @@ -138,7 +138,6 @@ online_all_offline_memory() { for memory in `hotpluggable_offline_memory`; do if ! online_memory_expect_success $memory; then - echo "$FUNCNAME $memory: unexpected fail" >&2 retval=1 fi done -- 2.17.1

2 years, 8 months

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[PATCH bpf v3 0/6] Fix bugs found by ASAN when running selftests

by Xu Kuohai

v3: - Fix error failure of case test_xdp_adjust_tail_grow exposed by this series v2: https://lore.kernel.org/bpf/20221010070454.577433-1-xukuohai@huaweicloud.com - Rebase and fix conflict v1: https://lore.kernel.org/bpf/20221009131830.395569-1-xukuohai@huaweicloud.com Xu Kuohai (6): libbpf: Fix use-after-free in btf_dump_name_dups libbpf: Fix memory leak in parse_usdt_arg() selftests/bpf: Fix memory leak caused by not destroying skeleton selftest/bpf: Fix memory leak in kprobe_multi_test selftests/bpf: Fix error failure of case test_xdp_adjust_tail_grow selftest/bpf: Fix error usage of ASSERT_OK in xdp_adjust_tail.c tools/lib/bpf/btf_dump.c | 47 +++++++++++---- tools/lib/bpf/usdt.c | 59 +++++++++++-------- .../bpf/prog_tests/kprobe_multi_test.c | 17 +++--- .../selftests/bpf/prog_tests/map_kptr.c | 3 +- .../selftests/bpf/prog_tests/tracing_struct.c | 3 +- .../bpf/prog_tests/xdp_adjust_tail.c | 7 ++- 6 files changed, 86 insertions(+), 50 deletions(-) -- 2.30.2

2 years, 8 months

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Re: [PATCH -next v5 2/4] selftests/memory-hotplug: Restore memory before exit

by zhaogongyi

Hi Shuah, David, I am sorry for my slow response, I have submit a new patch to fix it. Please see: https://patchwork.kernel.org/project/linux-kselftest/patch/20221011013926.2… Thanks, Gongyi > > On 10/10/22 00:54, David Hildenbrand wrote: > > On 08.10.22 03:40, zhaogongyi wrote: > > >> > >> Yes, online_memory_expect_success() already prints a warning, > remove > >> the warning in online_all_offline_memory() seems ok, > >> > >> My previous consideration was that one more log information would > make it easier to locate the wrong location. > > > > Let's keep it simple unless there is real reason to warn twice. > > > > zhaogongyi, > > Please note that I already applied the patches to linux-kselftest next for my > second pull request before the merge window. Please send the change > David requested in a separate patch on top of next as a fix. > > thanks, > -- Shuah

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