[dpdk-dev] 6/6] test/oops: support unit test case for oops handling APIs

[<jerinj@marvell.com>]

From: Jerin Jacob <jerinj@marvell.com>

Added unit test cases for all the oops handling APIs.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
---
 app/test/meson.build |   2 +
 app/test/test_oops.c | 121 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 123 insertions(+)
 create mode 100644 app/test/test_oops.c

diff --git a/app/test/meson.build b/app/test/meson.build
index a7611686ad..1e471ab351 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -97,6 +97,7 @@ test_sources = files(
         'test_metrics.c',
         'test_mcslock.c',
         'test_mp_secondary.c',
+        'test_oops.c',
         'test_per_lcore.c',
         'test_pflock.c',
         'test_pmd_perf.c',
@@ -236,6 +237,7 @@ fast_tests = [
         ['memzone_autotest', false],
         ['meter_autotest', true],
         ['multiprocess_autotest', false],
+        ['oops_autotest', true],
         ['per_lcore_autotest', true],
         ['pflock_autotest', true],
         ['prefetch_autotest', true],
diff --git a/app/test/test_oops.c b/app/test/test_oops.c
new file mode 100644
index 0000000000..60a7f259c7
--- /dev/null
+++ b/app/test/test_oops.c
@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2021 Marvell
+ */
+
+#include <setjmp.h>
+#include <signal.h>
+
+#include <rte_config.h>
+#include <rte_oops.h>
+
+#include "test.h"
+
+static jmp_buf pc;
+static bool detected_segfault;
+
+static void
+segv_handler(int sig, siginfo_t *info, void *ctx)
+{
+	detected_segfault = true;
+	rte_oops_decode(sig, info, (ucontext_t *)ctx);
+	longjmp(pc, 1);
+}
+
+/* OS specific way install the signal segfault handler*/
+static int
+segv_handler_install(void)
+{
+	struct sigaction sa;
+
+	sigemptyset(&sa.sa_mask);
+	sa.sa_sigaction = &segv_handler;
+	sa.sa_flags = SA_SIGINFO;
+
+	return sigaction(SIGSEGV, &sa, NULL);
+}
+
+static int
+test_oops_generate(void)
+{
+	int rc;
+
+	rc = segv_handler_install();
+	TEST_ASSERT_EQUAL(rc, 0, "rc=%d\n", rc);
+
+	detected_segfault = false;
+	rc = setjmp(pc); /* Save the execution state */
+	if (rc == 0) {
+		/* Generate a segfault */
+		*(volatile int *)0x05 = 0;
+	} else { /* logjump from segv_handler */
+		if (detected_segfault)
+			return TEST_SUCCESS;
+
+	}
+	return TEST_FAILED;
+}
+
+static int
+test_signal_handler_installed(int count, int *signals)
+{
+	int i, rc, verified = 0;
+	struct sigaction sa;
+
+	for (i = 0; i < count; i++) {
+		rc = sigaction(signals[i], NULL, &sa);
+		if (rc) {
+			printf("Failed to get sigaction for %d", signals[i]);
+			continue;
+		}
+		if (sa.sa_handler != SIG_DFL)
+			verified++;
+	}
+	TEST_ASSERT_EQUAL(count, verified, "count=%d verified=%d\n", count,
+			  verified);
+	return TEST_SUCCESS;
+}
+
+static int
+test_oops_signals_enabled(void)
+{
+	int *signals = NULL;
+	int i, rc;
+
+	rc = rte_oops_signals_enabled(signals);
+	TEST_ASSERT_NOT_EQUAL(rc, 0, "rc=%d\n", rc);
+
+	signals = malloc(sizeof(int) * rc);
+	rc = rte_oops_signals_enabled(signals);
+	TEST_ASSERT_NOT_EQUAL(rc, 0, "rc=%d\n", rc);
+	free(signals);
+
+	signals = malloc(sizeof(int) * RTE_OOPS_SIGNALS_MAX);
+	rc = rte_oops_signals_enabled(signals);
+	TEST_ASSERT_NOT_EQUAL(rc, 0, "rc=%d\n", rc);
+
+	for (i = 0; i < rc; i++)
+		TEST_ASSERT_NOT_EQUAL(signals[i], 0, "idx=%d val=%d\n", i,
+				      signals[i]);
+
+	rc = test_signal_handler_installed(rc, signals);
+	free(signals);
+
+	return rc;
+}
+
+static struct unit_test_suite oops_tests = {
+	.suite_name = "oops autotest",
+	.setup = NULL,
+	.teardown = NULL,
+	.unit_test_cases = {
+			    TEST_CASE(test_oops_signals_enabled),
+			    TEST_CASE(test_oops_generate),
+			    TEST_CASES_END()}};
+
+static int
+test_oops(void)
+{
+	return unit_test_suite_runner(&oops_tests);
+}
+
+REGISTER_TEST_COMMAND(oops_autotest, test_oops);
-- 
2.32.0