[RFC PATCH for 4.17 18/21] rseq: selftests: Provide basic test
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: 2018-03-27 16:21:11
Also in:
linux-kselftest, lkml
Subsystem:
kernel selftest framework, restartable sequences support, the rest · Maintainers:
Shuah Khan, Mathieu Desnoyers, Peter Zijlstra, "Paul E. McKenney", Boqun Feng, Linus Torvalds
"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 <redacted> CC: Russell King <redacted> CC: Catalin Marinas <catalin.marinas@arm.com> CC: Will Deacon <redacted> CC: Thomas Gleixner <redacted> CC: Paul Turner <redacted> CC: Andrew Hunter <redacted> CC: Peter Zijlstra <peterz@infradead.org> CC: Andy Lutomirski <luto@amacapital.net> CC: Andi Kleen <redacted> CC: Dave Watson <redacted> CC: Chris Lameter <redacted> CC: Ingo Molnar <mingo@redhat.com> CC: "H. Peter Anvin" <hpa@zytor.com> CC: Ben Maurer <redacted> CC: Steven Rostedt <rostedt@goodmis.org> CC: "Paul E. McKenney" <redacted> CC: Josh Triplett <josh@joshtriplett.org> CC: Linus Torvalds <torvalds@linux-foundation.org> CC: Andrew Morton <akpm@linux-foundation.org> CC: Boqun Feng <redacted> 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