selftests: bpf: break up test_progs - stackmap

Move stackmap prog tests into separate files.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

tools/testing/selftests/bpf/prog_tests/stacktrace_build_id.c

@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+
+void test_stacktrace_build_id(void)
+{
+	int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
+	const char *file = "./test_stacktrace_build_id.o";
+	int bytes, efd, err, pmu_fd, prog_fd, stack_trace_len;
+	struct perf_event_attr attr = {};
+	__u32 key, previous_key, val, duration = 0;
+	struct bpf_object *obj;
+	char buf[256];
+	int i, j;
+	struct bpf_stack_build_id id_offs[PERF_MAX_STACK_DEPTH];
+	int build_id_matches = 0;
+	int retry = 1;
+
+retry:
+	err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
+	if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
+		goto out;
+
+	/* Get the ID for the sched/sched_switch tracepoint */
+	snprintf(buf, sizeof(buf),
+		 "/sys/kernel/debug/tracing/events/random/urandom_read/id");
+	efd = open(buf, O_RDONLY, 0);
+	if (CHECK(efd < 0, "open", "err %d errno %d\n", efd, errno))
+		goto close_prog;
+
+	bytes = read(efd, buf, sizeof(buf));
+	close(efd);
+	if (CHECK(bytes <= 0 || bytes >= sizeof(buf),
+		  "read", "bytes %d errno %d\n", bytes, errno))
+		goto close_prog;
+
+	/* Open the perf event and attach bpf progrram */
+	attr.config = strtol(buf, NULL, 0);
+	attr.type = PERF_TYPE_TRACEPOINT;
+	attr.sample_type = PERF_SAMPLE_RAW | PERF_SAMPLE_CALLCHAIN;
+	attr.sample_period = 1;
+	attr.wakeup_events = 1;
+	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
+			 0 /* cpu 0 */, -1 /* group id */,
+			 0 /* flags */);
+	if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
+		  pmu_fd, errno))
+		goto close_prog;
+
+	err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
+	if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n",
+		  err, errno))
+		goto close_pmu;
+
+	err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
+	if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n",
+		  err, errno))
+		goto disable_pmu;
+
+	/* find map fds */
+	control_map_fd = bpf_find_map(__func__, obj, "control_map");
+	if (CHECK(control_map_fd < 0, "bpf_find_map control_map",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
+	if (CHECK(stackid_hmap_fd < 0, "bpf_find_map stackid_hmap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
+	if (CHECK(stackmap_fd < 0, "bpf_find_map stackmap", "err %d errno %d\n",
+		  err, errno))
+		goto disable_pmu;
+
+	stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
+	if (CHECK(stack_amap_fd < 0, "bpf_find_map stack_amap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	assert(system("dd if=/dev/urandom of=/dev/zero count=4 2> /dev/null")
+	       == 0);
+	assert(system("./urandom_read") == 0);
+	/* disable stack trace collection */
+	key = 0;
+	val = 1;
+	bpf_map_update_elem(control_map_fd, &key, &val, 0);
+
+	/* for every element in stackid_hmap, we can find a corresponding one
+	 * in stackmap, and vise versa.
+	 */
+	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
+	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
+	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	err = extract_build_id(buf, 256);
+
+	if (CHECK(err, "get build_id with readelf",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	err = bpf_map_get_next_key(stackmap_fd, NULL, &key);
+	if (CHECK(err, "get_next_key from stackmap",
+		  "err %d, errno %d\n", err, errno))
+		goto disable_pmu;
+
+	do {
+		char build_id[64];
+
+		err = bpf_map_lookup_elem(stackmap_fd, &key, id_offs);
+		if (CHECK(err, "lookup_elem from stackmap",
+			  "err %d, errno %d\n", err, errno))
+			goto disable_pmu;
+		for (i = 0; i < PERF_MAX_STACK_DEPTH; ++i)
+			if (id_offs[i].status == BPF_STACK_BUILD_ID_VALID &&
+			    id_offs[i].offset != 0) {
+				for (j = 0; j < 20; ++j)
+					sprintf(build_id + 2 * j, "%02x",
+						id_offs[i].build_id[j] & 0xff);
+				if (strstr(buf, build_id) != NULL)
+					build_id_matches = 1;
+			}
+		previous_key = key;
+	} while (bpf_map_get_next_key(stackmap_fd, &previous_key, &key) == 0);
+
+	/* stack_map_get_build_id_offset() is racy and sometimes can return
+	 * BPF_STACK_BUILD_ID_IP instead of BPF_STACK_BUILD_ID_VALID;
+	 * try it one more time.
+	 */
+	if (build_id_matches < 1 && retry--) {
+		ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
+		close(pmu_fd);
+		bpf_object__close(obj);
+		printf("%s:WARN:Didn't find expected build ID from the map, retrying\n",
+		       __func__);
+		goto retry;
+	}
+
+	if (CHECK(build_id_matches < 1, "build id match",
+		  "Didn't find expected build ID from the map\n"))
+		goto disable_pmu;
+
+	stack_trace_len = PERF_MAX_STACK_DEPTH
+		* sizeof(struct bpf_stack_build_id);
+	err = compare_stack_ips(stackmap_fd, stack_amap_fd, stack_trace_len);
+	CHECK(err, "compare_stack_ips stackmap vs. stack_amap",
+	      "err %d errno %d\n", err, errno);
+
+disable_pmu:
+	ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
+
+close_pmu:
+	close(pmu_fd);
+
+close_prog:
+	bpf_object__close(obj);
+
+out:
+	return;
+}

tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c

@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+
+void test_stacktrace_build_id_nmi(void)
+{
+	int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
+	const char *file = "./test_stacktrace_build_id.o";
+	int err, pmu_fd, prog_fd;
+	struct perf_event_attr attr = {
+		.sample_freq = 5000,
+		.freq = 1,
+		.type = PERF_TYPE_HARDWARE,
+		.config = PERF_COUNT_HW_CPU_CYCLES,
+	};
+	__u32 key, previous_key, val, duration = 0;
+	struct bpf_object *obj;
+	char buf[256];
+	int i, j;
+	struct bpf_stack_build_id id_offs[PERF_MAX_STACK_DEPTH];
+	int build_id_matches = 0;
+	int retry = 1;
+
+retry:
+	err = bpf_prog_load(file, BPF_PROG_TYPE_PERF_EVENT, &obj, &prog_fd);
+	if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
+		return;
+
+	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
+			 0 /* cpu 0 */, -1 /* group id */,
+			 0 /* flags */);
+	if (CHECK(pmu_fd < 0, "perf_event_open",
+		  "err %d errno %d. Does the test host support PERF_COUNT_HW_CPU_CYCLES?\n",
+		  pmu_fd, errno))
+		goto close_prog;
+
+	err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
+	if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n",
+		  err, errno))
+		goto close_pmu;
+
+	err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
+	if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n",
+		  err, errno))
+		goto disable_pmu;
+
+	/* find map fds */
+	control_map_fd = bpf_find_map(__func__, obj, "control_map");
+	if (CHECK(control_map_fd < 0, "bpf_find_map control_map",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
+	if (CHECK(stackid_hmap_fd < 0, "bpf_find_map stackid_hmap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
+	if (CHECK(stackmap_fd < 0, "bpf_find_map stackmap", "err %d errno %d\n",
+		  err, errno))
+		goto disable_pmu;
+
+	stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
+	if (CHECK(stack_amap_fd < 0, "bpf_find_map stack_amap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	assert(system("dd if=/dev/urandom of=/dev/zero count=4 2> /dev/null")
+	       == 0);
+	assert(system("taskset 0x1 ./urandom_read 100000") == 0);
+	/* disable stack trace collection */
+	key = 0;
+	val = 1;
+	bpf_map_update_elem(control_map_fd, &key, &val, 0);
+
+	/* for every element in stackid_hmap, we can find a corresponding one
+	 * in stackmap, and vise versa.
+	 */
+	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
+	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
+	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	err = extract_build_id(buf, 256);
+
+	if (CHECK(err, "get build_id with readelf",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu;
+
+	err = bpf_map_get_next_key(stackmap_fd, NULL, &key);
+	if (CHECK(err, "get_next_key from stackmap",
+		  "err %d, errno %d\n", err, errno))
+		goto disable_pmu;
+
+	do {
+		char build_id[64];
+
+		err = bpf_map_lookup_elem(stackmap_fd, &key, id_offs);
+		if (CHECK(err, "lookup_elem from stackmap",
+			  "err %d, errno %d\n", err, errno))
+			goto disable_pmu;
+		for (i = 0; i < PERF_MAX_STACK_DEPTH; ++i)
+			if (id_offs[i].status == BPF_STACK_BUILD_ID_VALID &&
+			    id_offs[i].offset != 0) {
+				for (j = 0; j < 20; ++j)
+					sprintf(build_id + 2 * j, "%02x",
+						id_offs[i].build_id[j] & 0xff);
+				if (strstr(buf, build_id) != NULL)
+					build_id_matches = 1;
+			}
+		previous_key = key;
+	} while (bpf_map_get_next_key(stackmap_fd, &previous_key, &key) == 0);
+
+	/* stack_map_get_build_id_offset() is racy and sometimes can return
+	 * BPF_STACK_BUILD_ID_IP instead of BPF_STACK_BUILD_ID_VALID;
+	 * try it one more time.
+	 */
+	if (build_id_matches < 1 && retry--) {
+		ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
+		close(pmu_fd);
+		bpf_object__close(obj);
+		printf("%s:WARN:Didn't find expected build ID from the map, retrying\n",
+		       __func__);
+		goto retry;
+	}
+
+	if (CHECK(build_id_matches < 1, "build id match",
+		  "Didn't find expected build ID from the map\n"))
+		goto disable_pmu;
+
+	/*
+	 * We intentionally skip compare_stack_ips(). This is because we
+	 * only support one in_nmi() ips-to-build_id translation per cpu
+	 * at any time, thus stack_amap here will always fallback to
+	 * BPF_STACK_BUILD_ID_IP;
+	 */
+
+disable_pmu:
+	ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
+
+close_pmu:
+	close(pmu_fd);
+
+close_prog:
+	bpf_object__close(obj);
+}

tools/testing/selftests/bpf/prog_tests/stacktrace_map.c

@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+
+void test_stacktrace_map(void)
+{
+	int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
+	const char *file = "./test_stacktrace_map.o";
+	int bytes, efd, err, pmu_fd, prog_fd, stack_trace_len;
+	struct perf_event_attr attr = {};
+	__u32 key, val, duration = 0;
+	struct bpf_object *obj;
+	char buf[256];
+
+	err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
+	if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
+		return;
+
+	/* Get the ID for the sched/sched_switch tracepoint */
+	snprintf(buf, sizeof(buf),
+		 "/sys/kernel/debug/tracing/events/sched/sched_switch/id");
+	efd = open(buf, O_RDONLY, 0);
+	if (CHECK(efd < 0, "open", "err %d errno %d\n", efd, errno))
+		goto close_prog;
+
+	bytes = read(efd, buf, sizeof(buf));
+	close(efd);
+	if (bytes <= 0 || bytes >= sizeof(buf))
+		goto close_prog;
+
+	/* Open the perf event and attach bpf progrram */
+	attr.config = strtol(buf, NULL, 0);
+	attr.type = PERF_TYPE_TRACEPOINT;
+	attr.sample_type = PERF_SAMPLE_RAW | PERF_SAMPLE_CALLCHAIN;
+	attr.sample_period = 1;
+	attr.wakeup_events = 1;
+	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
+			 0 /* cpu 0 */, -1 /* group id */,
+			 0 /* flags */);
+	if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
+		  pmu_fd, errno))
+		goto close_prog;
+
+	err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
+	if (err)
+		goto disable_pmu;
+
+	err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
+	if (err)
+		goto disable_pmu;
+
+	/* find map fds */
+	control_map_fd = bpf_find_map(__func__, obj, "control_map");
+	if (control_map_fd < 0)
+		goto disable_pmu;
+
+	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
+	if (stackid_hmap_fd < 0)
+		goto disable_pmu;
+
+	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
+	if (stackmap_fd < 0)
+		goto disable_pmu;
+
+	stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
+	if (stack_amap_fd < 0)
+		goto disable_pmu;
+
+	/* give some time for bpf program run */
+	sleep(1);
+
+	/* disable stack trace collection */
+	key = 0;
+	val = 1;
+	bpf_map_update_elem(control_map_fd, &key, &val, 0);
+
+	/* for every element in stackid_hmap, we can find a corresponding one
+	 * in stackmap, and vise versa.
+	 */
+	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
+	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu_noerr;
+
+	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
+	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu_noerr;
+
+	stack_trace_len = PERF_MAX_STACK_DEPTH * sizeof(__u64);
+	err = compare_stack_ips(stackmap_fd, stack_amap_fd, stack_trace_len);
+	if (CHECK(err, "compare_stack_ips stackmap vs. stack_amap",
+		  "err %d errno %d\n", err, errno))
+		goto disable_pmu_noerr;
+
+	goto disable_pmu_noerr;
+disable_pmu:
+	error_cnt++;
+disable_pmu_noerr:
+	ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
+	close(pmu_fd);
+close_prog:
+	bpf_object__close(obj);
+}

tools/testing/selftests/bpf/prog_tests/stacktrace_map_raw_tp.c

@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+
+void test_stacktrace_map_raw_tp(void)
+{
+	int control_map_fd, stackid_hmap_fd, stackmap_fd;
+	const char *file = "./test_stacktrace_map.o";
+	int efd, err, prog_fd;
+	__u32 key, val, duration = 0;
+	struct bpf_object *obj;
+
+	err = bpf_prog_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);
+	if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))
+		return;
+
+	efd = bpf_raw_tracepoint_open("sched_switch", prog_fd);
+	if (CHECK(efd < 0, "raw_tp_open", "err %d errno %d\n", efd, errno))
+		goto close_prog;
+
+	/* find map fds */
+	control_map_fd = bpf_find_map(__func__, obj, "control_map");
+	if (control_map_fd < 0)
+		goto close_prog;
+
+	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
+	if (stackid_hmap_fd < 0)
+		goto close_prog;
+
+	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
+	if (stackmap_fd < 0)
+		goto close_prog;
+
+	/* give some time for bpf program run */
+	sleep(1);
+
+	/* disable stack trace collection */
+	key = 0;
+	val = 1;
+	bpf_map_update_elem(control_map_fd, &key, &val, 0);
+
+	/* for every element in stackid_hmap, we can find a corresponding one
+	 * in stackmap, and vise versa.
+	 */
+	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
+	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
+		  "err %d errno %d\n", err, errno))
+		goto close_prog;
+
+	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
+	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
+		  "err %d errno %d\n", err, errno))
+		goto close_prog;
+
+	goto close_prog_noerr;
+close_prog:
+	error_cnt++;
+close_prog_noerr:
+	bpf_object__close(obj);
+}

tools/testing/selftests/bpf/test_progs.c

@@ -661,7 +661,7 @@ static void test_tp_attach_query(void)
 	free(query);
 }
 
-static int compare_map_keys(int map1_fd, int map2_fd)
+int compare_map_keys(int map1_fd, int map2_fd)
 {
 	__u32 key, next_key;
 	char val_buf[PERF_MAX_STACK_DEPTH *
@@ -688,7 +688,7 @@ static int compare_map_keys(int map1_fd, int map2_fd)
 	return 0;
 }
 
-static int compare_stack_ips(int smap_fd, int amap_fd, int stack_trace_len)
+int compare_stack_ips(int smap_fd, int amap_fd, int stack_trace_len)
 {
 	__u32 key, next_key, *cur_key_p, *next_key_p;
 	char *val_buf1, *val_buf2;
@@ -724,165 +724,7 @@ out:
 	return err;
 }
 
-static void test_stacktrace_map()
-{
-	int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
-	const char *file = "./test_stacktrace_map.o";
-	int bytes, efd, err, pmu_fd, prog_fd, stack_trace_len;
-	struct perf_event_attr attr = {};
-	__u32 key, val, duration = 0;
-	struct bpf_object *obj;
-	char buf[256];
-
-	err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
-	if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
-		return;
-
-	/* Get the ID for the sched/sched_switch tracepoint */
-	snprintf(buf, sizeof(buf),
-		 "/sys/kernel/debug/tracing/events/sched/sched_switch/id");
-	efd = open(buf, O_RDONLY, 0);
-	if (CHECK(efd < 0, "open", "err %d errno %d\n", efd, errno))
-		goto close_prog;
-
-	bytes = read(efd, buf, sizeof(buf));
-	close(efd);
-	if (bytes <= 0 || bytes >= sizeof(buf))
-		goto close_prog;
-
-	/* Open the perf event and attach bpf progrram */
-	attr.config = strtol(buf, NULL, 0);
-	attr.type = PERF_TYPE_TRACEPOINT;
-	attr.sample_type = PERF_SAMPLE_RAW | PERF_SAMPLE_CALLCHAIN;
-	attr.sample_period = 1;
-	attr.wakeup_events = 1;
-	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
-			 0 /* cpu 0 */, -1 /* group id */,
-			 0 /* flags */);
-	if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
-		  pmu_fd, errno))
-		goto close_prog;
-
-	err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
-	if (err)
-		goto disable_pmu;
-
-	err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
-	if (err)
-		goto disable_pmu;
-
-	/* find map fds */
-	control_map_fd = bpf_find_map(__func__, obj, "control_map");
-	if (control_map_fd < 0)
-		goto disable_pmu;
-
-	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
-	if (stackid_hmap_fd < 0)
-		goto disable_pmu;
-
-	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
-	if (stackmap_fd < 0)
-		goto disable_pmu;
-
-	stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
-	if (stack_amap_fd < 0)
-		goto disable_pmu;
-
-	/* give some time for bpf program run */
-	sleep(1);
-
-	/* disable stack trace collection */
-	key = 0;
-	val = 1;
-	bpf_map_update_elem(control_map_fd, &key, &val, 0);
-
-	/* for every element in stackid_hmap, we can find a corresponding one
-	 * in stackmap, and vise versa.
-	 */
-	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
-	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu_noerr;
-
-	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
-	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu_noerr;
-
-	stack_trace_len = PERF_MAX_STACK_DEPTH * sizeof(__u64);
-	err = compare_stack_ips(stackmap_fd, stack_amap_fd, stack_trace_len);
-	if (CHECK(err, "compare_stack_ips stackmap vs. stack_amap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu_noerr;
-
-	goto disable_pmu_noerr;
-disable_pmu:
-	error_cnt++;
-disable_pmu_noerr:
-	ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
-	close(pmu_fd);
-close_prog:
-	bpf_object__close(obj);
-}
-
-static void test_stacktrace_map_raw_tp()
-{
-	int control_map_fd, stackid_hmap_fd, stackmap_fd;
-	const char *file = "./test_stacktrace_map.o";
-	int efd, err, prog_fd;
-	__u32 key, val, duration = 0;
-	struct bpf_object *obj;
-
-	err = bpf_prog_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);
-	if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))
-		return;
-
-	efd = bpf_raw_tracepoint_open("sched_switch", prog_fd);
-	if (CHECK(efd < 0, "raw_tp_open", "err %d errno %d\n", efd, errno))
-		goto close_prog;
-
-	/* find map fds */
-	control_map_fd = bpf_find_map(__func__, obj, "control_map");
-	if (control_map_fd < 0)
-		goto close_prog;
-
-	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
-	if (stackid_hmap_fd < 0)
-		goto close_prog;
-
-	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
-	if (stackmap_fd < 0)
-		goto close_prog;
-
-	/* give some time for bpf program run */
-	sleep(1);
-
-	/* disable stack trace collection */
-	key = 0;
-	val = 1;
-	bpf_map_update_elem(control_map_fd, &key, &val, 0);
-
-	/* for every element in stackid_hmap, we can find a corresponding one
-	 * in stackmap, and vise versa.
-	 */
-	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
-	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
-		  "err %d errno %d\n", err, errno))
-		goto close_prog;
-
-	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
-	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
-		  "err %d errno %d\n", err, errno))
-		goto close_prog;
-
-	goto close_prog_noerr;
-close_prog:
-	error_cnt++;
-close_prog_noerr:
-	bpf_object__close(obj);
-}
-
-static int extract_build_id(char *build_id, size_t size)
+int extract_build_id(char *build_id, size_t size)
 {
 	FILE *fp;
 	char *line = NULL;
@@ -906,317 +748,6 @@ err:
 	return -1;
 }
 
-static void test_stacktrace_build_id(void)
-{
-	int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
-	const char *file = "./test_stacktrace_build_id.o";
-	int bytes, efd, err, pmu_fd, prog_fd, stack_trace_len;
-	struct perf_event_attr attr = {};
-	__u32 key, previous_key, val, duration = 0;
-	struct bpf_object *obj;
-	char buf[256];
-	int i, j;
-	struct bpf_stack_build_id id_offs[PERF_MAX_STACK_DEPTH];
-	int build_id_matches = 0;
-	int retry = 1;
-
-retry:
-	err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
-	if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
-		goto out;
-
-	/* Get the ID for the sched/sched_switch tracepoint */
-	snprintf(buf, sizeof(buf),
-		 "/sys/kernel/debug/tracing/events/random/urandom_read/id");
-	efd = open(buf, O_RDONLY, 0);
-	if (CHECK(efd < 0, "open", "err %d errno %d\n", efd, errno))
-		goto close_prog;
-
-	bytes = read(efd, buf, sizeof(buf));
-	close(efd);
-	if (CHECK(bytes <= 0 || bytes >= sizeof(buf),
-		  "read", "bytes %d errno %d\n", bytes, errno))
-		goto close_prog;
-
-	/* Open the perf event and attach bpf progrram */
-	attr.config = strtol(buf, NULL, 0);
-	attr.type = PERF_TYPE_TRACEPOINT;
-	attr.sample_type = PERF_SAMPLE_RAW | PERF_SAMPLE_CALLCHAIN;
-	attr.sample_period = 1;
-	attr.wakeup_events = 1;
-	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
-			 0 /* cpu 0 */, -1 /* group id */,
-			 0 /* flags */);
-	if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
-		  pmu_fd, errno))
-		goto close_prog;
-
-	err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
-	if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n",
-		  err, errno))
-		goto close_pmu;
-
-	err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
-	if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n",
-		  err, errno))
-		goto disable_pmu;
-
-	/* find map fds */
-	control_map_fd = bpf_find_map(__func__, obj, "control_map");
-	if (CHECK(control_map_fd < 0, "bpf_find_map control_map",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
-	if (CHECK(stackid_hmap_fd < 0, "bpf_find_map stackid_hmap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
-	if (CHECK(stackmap_fd < 0, "bpf_find_map stackmap", "err %d errno %d\n",
-		  err, errno))
-		goto disable_pmu;
-
-	stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
-	if (CHECK(stack_amap_fd < 0, "bpf_find_map stack_amap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	assert(system("dd if=/dev/urandom of=/dev/zero count=4 2> /dev/null")
-	       == 0);
-	assert(system("./urandom_read") == 0);
-	/* disable stack trace collection */
-	key = 0;
-	val = 1;
-	bpf_map_update_elem(control_map_fd, &key, &val, 0);
-
-	/* for every element in stackid_hmap, we can find a corresponding one
-	 * in stackmap, and vise versa.
-	 */
-	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
-	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
-	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	err = extract_build_id(buf, 256);
-
-	if (CHECK(err, "get build_id with readelf",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	err = bpf_map_get_next_key(stackmap_fd, NULL, &key);
-	if (CHECK(err, "get_next_key from stackmap",
-		  "err %d, errno %d\n", err, errno))
-		goto disable_pmu;
-
-	do {
-		char build_id[64];
-
-		err = bpf_map_lookup_elem(stackmap_fd, &key, id_offs);
-		if (CHECK(err, "lookup_elem from stackmap",
-			  "err %d, errno %d\n", err, errno))
-			goto disable_pmu;
-		for (i = 0; i < PERF_MAX_STACK_DEPTH; ++i)
-			if (id_offs[i].status == BPF_STACK_BUILD_ID_VALID &&
-			    id_offs[i].offset != 0) {
-				for (j = 0; j < 20; ++j)
-					sprintf(build_id + 2 * j, "%02x",
-						id_offs[i].build_id[j] & 0xff);
-				if (strstr(buf, build_id) != NULL)
-					build_id_matches = 1;
-			}
-		previous_key = key;
-	} while (bpf_map_get_next_key(stackmap_fd, &previous_key, &key) == 0);
-
-	/* stack_map_get_build_id_offset() is racy and sometimes can return
-	 * BPF_STACK_BUILD_ID_IP instead of BPF_STACK_BUILD_ID_VALID;
-	 * try it one more time.
-	 */
-	if (build_id_matches < 1 && retry--) {
-		ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
-		close(pmu_fd);
-		bpf_object__close(obj);
-		printf("%s:WARN:Didn't find expected build ID from the map, retrying\n",
-		       __func__);
-		goto retry;
-	}
-
-	if (CHECK(build_id_matches < 1, "build id match",
-		  "Didn't find expected build ID from the map\n"))
-		goto disable_pmu;
-
-	stack_trace_len = PERF_MAX_STACK_DEPTH
-		* sizeof(struct bpf_stack_build_id);
-	err = compare_stack_ips(stackmap_fd, stack_amap_fd, stack_trace_len);
-	CHECK(err, "compare_stack_ips stackmap vs. stack_amap",
-	      "err %d errno %d\n", err, errno);
-
-disable_pmu:
-	ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
-
-close_pmu:
-	close(pmu_fd);
-
-close_prog:
-	bpf_object__close(obj);
-
-out:
-	return;
-}
-
-static void test_stacktrace_build_id_nmi(void)
-{
-	int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
-	const char *file = "./test_stacktrace_build_id.o";
-	int err, pmu_fd, prog_fd;
-	struct perf_event_attr attr = {
-		.sample_freq = 5000,
-		.freq = 1,
-		.type = PERF_TYPE_HARDWARE,
-		.config = PERF_COUNT_HW_CPU_CYCLES,
-	};
-	__u32 key, previous_key, val, duration = 0;
-	struct bpf_object *obj;
-	char buf[256];
-	int i, j;
-	struct bpf_stack_build_id id_offs[PERF_MAX_STACK_DEPTH];
-	int build_id_matches = 0;
-	int retry = 1;
-
-retry:
-	err = bpf_prog_load(file, BPF_PROG_TYPE_PERF_EVENT, &obj, &prog_fd);
-	if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
-		return;
-
-	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
-			 0 /* cpu 0 */, -1 /* group id */,
-			 0 /* flags */);
-	if (CHECK(pmu_fd < 0, "perf_event_open",
-		  "err %d errno %d. Does the test host support PERF_COUNT_HW_CPU_CYCLES?\n",
-		  pmu_fd, errno))
-		goto close_prog;
-
-	err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
-	if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n",
-		  err, errno))
-		goto close_pmu;
-
-	err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
-	if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n",
-		  err, errno))
-		goto disable_pmu;
-
-	/* find map fds */
-	control_map_fd = bpf_find_map(__func__, obj, "control_map");
-	if (CHECK(control_map_fd < 0, "bpf_find_map control_map",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
-	if (CHECK(stackid_hmap_fd < 0, "bpf_find_map stackid_hmap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
-	if (CHECK(stackmap_fd < 0, "bpf_find_map stackmap", "err %d errno %d\n",
-		  err, errno))
-		goto disable_pmu;
-
-	stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
-	if (CHECK(stack_amap_fd < 0, "bpf_find_map stack_amap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	assert(system("dd if=/dev/urandom of=/dev/zero count=4 2> /dev/null")
-	       == 0);
-	assert(system("taskset 0x1 ./urandom_read 100000") == 0);
-	/* disable stack trace collection */
-	key = 0;
-	val = 1;
-	bpf_map_update_elem(control_map_fd, &key, &val, 0);
-
-	/* for every element in stackid_hmap, we can find a corresponding one
-	 * in stackmap, and vise versa.
-	 */
-	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
-	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
-	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	err = extract_build_id(buf, 256);
-
-	if (CHECK(err, "get build_id with readelf",
-		  "err %d errno %d\n", err, errno))
-		goto disable_pmu;
-
-	err = bpf_map_get_next_key(stackmap_fd, NULL, &key);
-	if (CHECK(err, "get_next_key from stackmap",
-		  "err %d, errno %d\n", err, errno))
-		goto disable_pmu;
-
-	do {
-		char build_id[64];
-
-		err = bpf_map_lookup_elem(stackmap_fd, &key, id_offs);
-		if (CHECK(err, "lookup_elem from stackmap",
-			  "err %d, errno %d\n", err, errno))
-			goto disable_pmu;
-		for (i = 0; i < PERF_MAX_STACK_DEPTH; ++i)
-			if (id_offs[i].status == BPF_STACK_BUILD_ID_VALID &&
-			    id_offs[i].offset != 0) {
-				for (j = 0; j < 20; ++j)
-					sprintf(build_id + 2 * j, "%02x",
-						id_offs[i].build_id[j] & 0xff);
-				if (strstr(buf, build_id) != NULL)
-					build_id_matches = 1;
-			}
-		previous_key = key;
-	} while (bpf_map_get_next_key(stackmap_fd, &previous_key, &key) == 0);
-
-	/* stack_map_get_build_id_offset() is racy and sometimes can return
-	 * BPF_STACK_BUILD_ID_IP instead of BPF_STACK_BUILD_ID_VALID;
-	 * try it one more time.
-	 */
-	if (build_id_matches < 1 && retry--) {
-		ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
-		close(pmu_fd);
-		bpf_object__close(obj);
-		printf("%s:WARN:Didn't find expected build ID from the map, retrying\n",
-		       __func__);
-		goto retry;
-	}
-
-	if (CHECK(build_id_matches < 1, "build id match",
-		  "Didn't find expected build ID from the map\n"))
-		goto disable_pmu;
-
-	/*
-	 * We intentionally skip compare_stack_ips(). This is because we
-	 * only support one in_nmi() ips-to-build_id translation per cpu
-	 * at any time, thus stack_amap here will always fallback to
-	 * BPF_STACK_BUILD_ID_IP;
-	 */
-
-disable_pmu:
-	ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
-
-close_pmu:
-	close(pmu_fd);
-
-close_prog:
-	bpf_object__close(obj);
-}
-
 #define MAX_CNT_RAWTP	10ull
 #define MAX_STACK_RAWTP	100
 struct get_stack_trace_t {
@@ -1893,10 +1424,6 @@ int main(void)
 	test_bpf_obj_id();
 	test_obj_name();
 	test_tp_attach_query();
-	test_stacktrace_map();
-	test_stacktrace_build_id();
-	test_stacktrace_build_id_nmi();
-	test_stacktrace_map_raw_tp();
 	test_get_stack_raw_tp();
 	test_task_fd_query_rawtp();
 	test_task_fd_query_tp();

tools/testing/selftests/bpf/test_progs.h

@@ -82,3 +82,6 @@ extern struct ipv6_packet pkt_v6;
 #define VIP_NUM 5
 
 int bpf_find_map(const char *test, struct bpf_object *obj, const char *name);
+int compare_map_keys(int map1_fd, int map2_fd);
+int compare_stack_ips(int smap_fd, int amap_fd, int stack_trace_len);
+int extract_build_id(char *build_id, size_t size);