Add Intel PT full trace mode basic test case

testcases/kernel/tracing/pt_test/pt_test.c new file +29 -0

+#include <linux/perf_event.h>
+#include <sched.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "tst_test.h"
+#include "lapi/syscalls.h"
+
+#define PAGESIZE 4096
+#define INTEL_PT_MEMSIZE (17*PAGESIZE)
+
+#define BIT(nr)                 (1UL << (nr))
+
+#define INTEL_PT_PMU_TYPE "/sys/devices/intel_pt/type"
+#define INTEL_PT_FORMAT_TSC "/sys/devices/intel_pt/format/tsc"
+#define INTEL_PT_FORMAT_NRT "/sys/devices/intel_pt/format/noretcomp"
+
+//Intel PT event handle
+int FDE = -1;
+//map head and size
+uint64_t **BUFM;
+long BUFSZ;
+
+uint64_t **create_map(int fde, long bufsize)
+{
+	int PROTo;
+	long pbufSz;
+	uint64_t **bufEv;
+	struct perf_event_mmap_page *pc;
+

testcases/kernel/tracing/pt_test/pt_test.c new file +23 -0

+		pc = (struct perf_event_mmap_page *)bufEv[0];
+		pc->aux_offset = pbufSz;
+		pc->aux_size = bufsize;
+		bufEv[1] = SAFE_MMAP(NULL, bufsize, PROTo, MAP_SHARED,
+								fde, pbufSz);
+	}
+	return bufEv;
+}
+
+
+int intel_pt_pmu_value(char *dir)
+{
+	char *value;
+	int val = 0;
+	char delims[] = ":";
+
+	SAFE_FILE_SCANF(dir, "%m[^\n]", &value);
+	if (strstr(value, delims) == NULL) {
+		val = atoi(value);
+	} else {
+		strsep(&value, delims);
+		val = atoi(value);
+	}

testcases/kernel/tracing/pt_test/pt_test.c new file +14 -0

+	munmap(bufEv[1], bufsize);
+
+	free(bufEv);
+}
+
+static void intel_pt_full_trace_check(void)
+{
+	uint64_t aux_head = 0;
+	struct perf_event_mmap_page *pmp;
+	/* enable tracing */
+	if (ioctl(FDE, PERF_EVENT_IOC_RESET) != 0) {
+		tst_res(TFAIL, "ioctl with PERF_EVENT_IOC_RESET is failed!");
+		return;
+	}

testcases/kernel/tracing/pt_test/pt_test.c new file +21 -0

+	// check if there is some trace generated
+	pmp = (struct perf_event_mmap_page *)BUFM[0];
+	aux_head = *(volatile uint64_t *)&pmp->aux_head;
+	if (aux_head == 0) {
+		tst_res(TFAIL, "There is no trace, so failed!");
+		return;
+	}
+
+	tst_res(TPASS, "perf trace full mode is passed!");
+}
+
+void setup(void)
+{
+	struct perf_event_attr attr = {};
+
+	BUFSZ = 2 * PAGESIZE;
+
+	//set attr for Intel PT trace
+	attr.type	= intel_pt_pmu_value(INTEL_PT_PMU_TYPE);
+	attr.read_format = PERF_FORMAT_ID | PERF_FORMAT_TOTAL_TIME_RUNNING |
+				PERF_FORMAT_TOTAL_TIME_ENABLED;

testcases/kernel/tracing/pt_test/pt_test.c new file +10 -0

+		del_map(BUFM, BUFSZ);
+}
+
+static struct tst_test test = {
+	.test_all = intel_pt_full_trace_check,
+	.min_kver = "4.1",
+	.setup = setup,
+	.cleanup = cleanup,
+	.needs_root = 1,
+};

Signature · 5 lines

2.14.1


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