Messages in this thread Patch in this message | | | From | Mathieu Desnoyers <> | Subject | [RFC PATCH for 4.18 20/23] rseq: selftests: Provide basic test | Date | Thu, 12 Apr 2018 15:27:57 -0400 |
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"basic_test" only asserts that RSEQ works moderately correctly. E.g. that the CPUID pointer works.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> CC: Shuah Khan <shuahkh@osg.samsung.com> CC: Russell King <linux@arm.linux.org.uk> CC: Catalin Marinas <catalin.marinas@arm.com> CC: Will Deacon <will.deacon@arm.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: Paul Turner <pjt@google.com> CC: Andrew Hunter <ahh@google.com> CC: Peter Zijlstra <peterz@infradead.org> CC: Andy Lutomirski <luto@amacapital.net> CC: Andi Kleen <andi@firstfloor.org> CC: Dave Watson <davejwatson@fb.com> CC: Chris Lameter <cl@linux.com> CC: Ingo Molnar <mingo@redhat.com> CC: "H. Peter Anvin" <hpa@zytor.com> CC: Ben Maurer <bmaurer@fb.com> CC: Steven Rostedt <rostedt@goodmis.org> CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> CC: Josh Triplett <josh@joshtriplett.org> CC: Linus Torvalds <torvalds@linux-foundation.org> CC: Andrew Morton <akpm@linux-foundation.org> CC: Boqun Feng <boqun.feng@gmail.com> CC: linux-kselftest@vger.kernel.org CC: linux-api@vger.kernel.org --- tools/testing/selftests/rseq/basic_test.c | 55 +++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 tools/testing/selftests/rseq/basic_test.c
diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c new file mode 100644 index 000000000000..e2086b3885d7 --- /dev/null +++ b/tools/testing/selftests/rseq/basic_test.c @@ -0,0 +1,55 @@ +/* + * Basic test coverage for critical regions and rseq_current_cpu(). + */ + +#define _GNU_SOURCE +#include <assert.h> +#include <sched.h> +#include <signal.h> +#include <stdio.h> +#include <string.h> +#include <sys/time.h> + +#include "rseq.h" + +void test_cpu_pointer(void) +{ + cpu_set_t affinity, test_affinity; + int i; + + sched_getaffinity(0, sizeof(affinity), &affinity); + CPU_ZERO(&test_affinity); + for (i = 0; i < CPU_SETSIZE; i++) { + if (CPU_ISSET(i, &affinity)) { + CPU_SET(i, &test_affinity); + sched_setaffinity(0, sizeof(test_affinity), + &test_affinity); + assert(sched_getcpu() == i); + assert(rseq_current_cpu() == i); + assert(rseq_current_cpu_raw() == i); + assert(rseq_cpu_start() == i); + CPU_CLR(i, &test_affinity); + } + } + sched_setaffinity(0, sizeof(affinity), &affinity); +} + +int main(int argc, char **argv) +{ + if (rseq_register_current_thread()) { + fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n", + errno, strerror(errno)); + goto init_thread_error; + } + printf("testing current cpu\n"); + test_cpu_pointer(); + if (rseq_unregister_current_thread()) { + fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n", + errno, strerror(errno)); + goto init_thread_error; + } + return 0; + +init_thread_error: + return -1; +} -- 2.11.0
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