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selftests/bpf: Convert few more selftest to skeletons 

Convert few more selftests to use generated BPF skeletons as a demonstration
on how to use it.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20191214014341.3442258-16-andriin@fb.com
This commit is contained in:
Andrii Nakryiko 2019-12-13 17:43:39 -08:00 committed by Alexei Starovoitov
parent f3c926a4df
commit dde53c1b76
5 changed files with 150 additions and 250 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

105
tools/testing/selftests/bpf/prog_tests/fentry_fexit.c
View File

@ -1,90 +1,59 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */
#include <test_progs.h>
#include "test_pkt_access.skel.h"
#include "fentry_test.skel.h"
#include "fexit_test.skel.h"
BPF_EMBED_OBJ(pkt_access, "test_pkt_access.o");
BPF_EMBED_OBJ(fentry, "fentry_test.o");
BPF_EMBED_OBJ(fexit, "fexit_test.o");
void test_fentry_fexit(void)
{
struct bpf_prog_load_attr attr_fentry = {
.file = "./fentry_test.o",
};
struct bpf_prog_load_attr attr_fexit = {
.file = "./fexit_test.o",
};
struct test_pkt_access *pkt_skel = NULL;
struct fentry_test *fentry_skel = NULL;
struct fexit_test *fexit_skel = NULL;
__u64 *fentry_res, *fexit_res;
__u32 duration = 0, retval;
int err, pkt_fd, i;
struct bpf_object *obj_fentry = NULL, *obj_fexit = NULL, *pkt_obj;
struct bpf_map *data_map_fentry, *data_map_fexit;
char fentry_name[] = "fentry/bpf_fentry_testX";
char fexit_name[] = "fexit/bpf_fentry_testX";
int err, pkt_fd, kfree_skb_fd, i;
struct bpf_link *link[12] = {};
struct bpf_program *prog[12];
__u32 duration, retval;
const int zero = 0;
u64 result[12];
err = bpf_prog_load("./test_pkt_access.o", BPF_PROG_TYPE_SCHED_CLS,
&pkt_obj, &pkt_fd);
if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno))
pkt_skel = test_pkt_access__open_and_load(&pkt_access_embed);
if (CHECK(!pkt_skel, "pkt_skel_load", "pkt_access skeleton failed\n"))
return;
err = bpf_prog_load_xattr(&attr_fentry, &obj_fentry, &kfree_skb_fd);
if (CHECK(err, "prog_load fail", "err %d errno %d\n", err, errno))
fentry_skel = fentry_test__open_and_load(&fentry_embed);
if (CHECK(!fentry_skel, "fentry_skel_load", "fentry skeleton failed\n"))
goto close_prog;
err = bpf_prog_load_xattr(&attr_fexit, &obj_fexit, &kfree_skb_fd);
if (CHECK(err, "prog_load fail", "err %d errno %d\n", err, errno))
fexit_skel = fexit_test__open_and_load(&fexit_embed);
if (CHECK(!fexit_skel, "fexit_skel_load", "fexit skeleton failed\n"))
goto close_prog;
for (i = 0; i < 6; i++) {
fentry_name[sizeof(fentry_name) - 2] = '1' + i;
prog[i] = bpf_object__find_program_by_title(obj_fentry, fentry_name);
if (CHECK(!prog[i], "find_prog", "prog %s not found\n", fentry_name))
goto close_prog;
link[i] = bpf_program__attach_trace(prog[i]);
if (CHECK(IS_ERR(link[i]), "attach_trace", "failed to link\n"))
goto close_prog;
}
data_map_fentry = bpf_object__find_map_by_name(obj_fentry, "fentry_t.bss");
if (CHECK(!data_map_fentry, "find_data_map", "data map not found\n"))
goto close_prog;
for (i = 6; i < 12; i++) {
fexit_name[sizeof(fexit_name) - 2] = '1' + i - 6;
prog[i] = bpf_object__find_program_by_title(obj_fexit, fexit_name);
if (CHECK(!prog[i], "find_prog", "prog %s not found\n", fexit_name))
goto close_prog;
link[i] = bpf_program__attach_trace(prog[i]);
if (CHECK(IS_ERR(link[i]), "attach_trace", "failed to link\n"))
goto close_prog;
}
data_map_fexit = bpf_object__find_map_by_name(obj_fexit, "fexit_te.bss");
if (CHECK(!data_map_fexit, "find_data_map", "data map not found\n"))
err = fentry_test__attach(fentry_skel);
if (CHECK(err, "fentry_attach", "fentry attach failed: %d\n", err))
goto close_prog;
err = fexit_test__attach(fexit_skel);
if (CHECK(err, "fexit_attach", "fexit attach failed: %d\n", err))
goto close_prog;
pkt_fd = bpf_program__fd(pkt_skel->progs.test_pkt_access);
err = bpf_prog_test_run(pkt_fd, 1, &pkt_v6, sizeof(pkt_v6),
NULL, NULL, &retval, &duration);
CHECK(err || retval, "ipv6",
"err %d errno %d retval %d duration %d\n",
err, errno, retval, duration);
err = bpf_map_lookup_elem(bpf_map__fd(data_map_fentry), &zero, &result);
if (CHECK(err, "get_result",
"failed to get output data: %d\n", err))
goto close_prog;
err = bpf_map_lookup_elem(bpf_map__fd(data_map_fexit), &zero, result + 6);
if (CHECK(err, "get_result",
"failed to get output data: %d\n", err))
goto close_prog;
for (i = 0; i < 12; i++)
if (CHECK(result[i] != 1, "result", "bpf_fentry_test%d failed err %ld\n",
i % 6 + 1, result[i]))
goto close_prog;
fentry_res = (__u64 *)fentry_skel->bss;
fexit_res = (__u64 *)fexit_skel->bss;
printf("%lld\n", fentry_skel->bss->test1_result);
for (i = 0; i < 6; i++) {
CHECK(fentry_res[i] != 1, "result",
"fentry_test%d failed err %lld\n", i + 1, fentry_res[i]);
CHECK(fexit_res[i] != 1, "result",
"fexit_test%d failed err %lld\n", i + 1, fexit_res[i]);
}
close_prog:
for (i = 0; i < 12; i++)
if (!IS_ERR_OR_NULL(link[i]))
bpf_link__destroy(link[i]);
bpf_object__close(obj_fentry);
bpf_object__close(obj_fexit);
bpf_object__close(pkt_obj);
test_pkt_access__destroy(pkt_skel);
fentry_test__destroy(fentry_skel);
fexit_test__destroy(fexit_skel);
}

72
tools/testing/selftests/bpf/prog_tests/fentry_test.c
View File

@ -1,64 +1,46 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */
#include <test_progs.h>
#include "test_pkt_access.skel.h"
#include "fentry_test.skel.h"
BPF_EMBED_OBJ_DECLARE(pkt_access);
BPF_EMBED_OBJ_DECLARE(fentry);
void test_fentry_test(void)
{
struct bpf_prog_load_attr attr = {
.file = "./fentry_test.o",
};
char prog_name[] = "fentry/bpf_fentry_testX";
struct bpf_object *obj = NULL, *pkt_obj;
int err, pkt_fd, kfree_skb_fd, i;
struct bpf_link *link[6] = {};
struct bpf_program *prog[6];
struct test_pkt_access *pkt_skel = NULL;
struct fentry_test *fentry_skel = NULL;
int err, pkt_fd, i;
__u32 duration, retval;
struct bpf_map *data_map;
const int zero = 0;
u64 result[6];
__u64 *result;
err = bpf_prog_load("./test_pkt_access.o", BPF_PROG_TYPE_SCHED_CLS,
&pkt_obj, &pkt_fd);
if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno))
pkt_skel = test_pkt_access__open_and_load(&pkt_access_embed);
if (CHECK(!pkt_skel, "pkt_skel_load", "pkt_access skeleton failed\n"))
return;
err = bpf_prog_load_xattr(&attr, &obj, &kfree_skb_fd);
if (CHECK(err, "prog_load fail", "err %d errno %d\n", err, errno))
goto close_prog;
fentry_skel = fentry_test__open_and_load(&fentry_embed);
if (CHECK(!fentry_skel, "fentry_skel_load", "fentry skeleton failed\n"))
goto cleanup;
for (i = 0; i < 6; i++) {
prog_name[sizeof(prog_name) - 2] = '1' + i;
prog[i] = bpf_object__find_program_by_title(obj, prog_name);
if (CHECK(!prog[i], "find_prog", "prog %s not found\n", prog_name))
goto close_prog;
link[i] = bpf_program__attach_trace(prog[i]);
if (CHECK(IS_ERR(link[i]), "attach_trace", "failed to link\n"))
goto close_prog;
}
data_map = bpf_object__find_map_by_name(obj, "fentry_t.bss");
if (CHECK(!data_map, "find_data_map", "data map not found\n"))
goto close_prog;
err = fentry_test__attach(fentry_skel);
if (CHECK(err, "fentry_attach", "fentry attach failed: %d\n", err))
goto cleanup;
pkt_fd = bpf_program__fd(pkt_skel->progs.test_pkt_access);
err = bpf_prog_test_run(pkt_fd, 1, &pkt_v6, sizeof(pkt_v6),
NULL, NULL, &retval, &duration);
CHECK(err || retval, "ipv6",
"err %d errno %d retval %d duration %d\n",
err, errno, retval, duration);
err = bpf_map_lookup_elem(bpf_map__fd(data_map), &zero, &result);
if (CHECK(err, "get_result",
"failed to get output data: %d\n", err))
goto close_prog;
result = (__u64 *)fentry_skel->bss;
for (i = 0; i < 6; i++) {
if (CHECK(result[i] != 1, "result",
"fentry_test%d failed err %lld\n", i + 1, result[i]))
goto cleanup;
}
for (i = 0; i < 6; i++)
if (CHECK(result[i] != 1, "result", "bpf_fentry_test%d failed err %ld\n",
i + 1, result[i]))
goto close_prog;
close_prog:
for (i = 0; i < 6; i++)
if (!IS_ERR_OR_NULL(link[i]))
bpf_link__destroy(link[i]);
bpf_object__close(obj);
bpf_object__close(pkt_obj);
cleanup:
fentry_test__destroy(fentry_skel);
test_pkt_access__destroy(pkt_skel);
}

60
tools/testing/selftests/bpf/prog_tests/mmap.c
View File

@ -1,59 +1,41 @@
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <sys/mman.h>
#include "test_mmap.skel.h"
struct map_data {
__u64 val[512 * 4];
};
struct bss_data {
__u64 in_val;
__u64 out_val;
};
static size_t roundup_page(size_t sz)
{
long page_size = sysconf(_SC_PAGE_SIZE);
return (sz + page_size - 1) / page_size * page_size;
}
BPF_EMBED_OBJ(test_mmap, "test_mmap.o");
void test_mmap(void)
{
const char *file = "test_mmap.o";
const char *probe_name = "raw_tracepoint/sys_enter";
const char *tp_name = "sys_enter";
const size_t bss_sz = roundup_page(sizeof(struct bss_data));
const size_t bss_sz = roundup_page(sizeof(struct test_mmap__bss));
const size_t map_sz = roundup_page(sizeof(struct map_data));
const int zero = 0, one = 1, two = 2, far = 1500;
const long page_size = sysconf(_SC_PAGE_SIZE);
int err, duration = 0, i, data_map_fd;
struct bpf_program *prog;
struct bpf_object *obj;
struct bpf_link *link = NULL;
struct bpf_map *data_map, *bss_map;
void *bss_mmaped = NULL, *map_mmaped = NULL, *tmp1, *tmp2;
volatile struct bss_data *bss_data;
volatile struct map_data *map_data;
struct test_mmap__bss *bss_data;
struct map_data *map_data;
struct test_mmap *skel;
__u64 val = 0;
obj = bpf_object__open_file("test_mmap.o", NULL);
if (CHECK(IS_ERR(obj), "obj_open", "failed to open '%s': %ld\n",
file, PTR_ERR(obj)))
return;
prog = bpf_object__find_program_by_title(obj, probe_name);
if (CHECK(!prog, "find_probe", "prog '%s' not found\n", probe_name))
goto cleanup;
err = bpf_object__load(obj);
if (CHECK(err, "obj_load", "failed to load prog '%s': %d\n",
probe_name, err))
goto cleanup;
bss_map = bpf_object__find_map_by_name(obj, "test_mma.bss");
if (CHECK(!bss_map, "find_bss_map", ".bss map not found\n"))
goto cleanup;
data_map = bpf_object__find_map_by_name(obj, "data_map");
if (CHECK(!data_map, "find_data_map", "data_map map not found\n"))
goto cleanup;
skel = test_mmap__open_and_load(&test_mmap_embed);
if (CHECK(!skel, "skel_open_and_load", "skeleton open/load failed\n"))
return;
bss_map = skel->maps.bss;
data_map = skel->maps.data_map;
data_map_fd = bpf_map__fd(data_map);
bss_mmaped = mmap(NULL, bss_sz, PROT_READ | PROT_WRITE, MAP_SHARED,
@ -77,13 +59,15 @@ void test_mmap(void)
CHECK_FAIL(bss_data->in_val);
CHECK_FAIL(bss_data->out_val);
CHECK_FAIL(skel->bss->in_val);
CHECK_FAIL(skel->bss->out_val);
CHECK_FAIL(map_data->val[0]);
CHECK_FAIL(map_data->val[1]);
CHECK_FAIL(map_data->val[2]);
CHECK_FAIL(map_data->val[far]);
link = bpf_program__attach_raw_tracepoint(prog, tp_name);
if (CHECK(IS_ERR(link), "attach_raw_tp", "err %ld\n", PTR_ERR(link)))
err = test_mmap__attach(skel);
if (CHECK(err, "attach_raw_tp", "err %d\n", err))
goto cleanup;
bss_data->in_val = 123;
@ -94,6 +78,8 @@ void test_mmap(void)
CHECK_FAIL(bss_data->in_val != 123);
CHECK_FAIL(bss_data->out_val != 123);
CHECK_FAIL(skel->bss->in_val != 123);
CHECK_FAIL(skel->bss->out_val != 123);
CHECK_FAIL(map_data->val[0] != 111);
CHECK_FAIL(map_data->val[1] != 222);
CHECK_FAIL(map_data->val[2] != 123);
@ -160,6 +146,8 @@ void test_mmap(void)
usleep(1);
CHECK_FAIL(bss_data->in_val != 321);
CHECK_FAIL(bss_data->out_val != 321);
CHECK_FAIL(skel->bss->in_val != 321);
CHECK_FAIL(skel->bss->out_val != 321);
CHECK_FAIL(map_data->val[0] != 111);
CHECK_FAIL(map_data->val[1] != 222);
CHECK_FAIL(map_data->val[2] != 321);
@ -203,6 +191,8 @@ void test_mmap(void)
map_data = tmp2;
CHECK_FAIL(bss_data->in_val != 321);
CHECK_FAIL(bss_data->out_val != 321);
CHECK_FAIL(skel->bss->in_val != 321);
CHECK_FAIL(skel->bss->out_val != 321);
CHECK_FAIL(map_data->val[0] != 111);
CHECK_FAIL(map_data->val[1] != 222);
CHECK_FAIL(map_data->val[2] != 321);
@ -214,7 +204,5 @@ void test_mmap(void)
CHECK_FAIL(munmap(bss_mmaped, bss_sz));
if (map_mmaped)
CHECK_FAIL(munmap(map_mmaped, map_sz));
if (!IS_ERR_OR_NULL(link))
bpf_link__destroy(link);
bpf_object__close(obj);
test_mmap__destroy(skel);
}

79
tools/testing/selftests/bpf/prog_tests/stacktrace_build_id.c
View File

@ -1,16 +1,16 @@
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "test_stacktrace_build_id.skel.h"
BPF_EMBED_OBJ(stacktrace_build_id, "test_stacktrace_build_id.o");
void test_stacktrace_build_id(void)
{
int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
const char *prog_name = "tracepoint/random/urandom_read";
const char *file = "./test_stacktrace_build_id.o";
int err, prog_fd, stack_trace_len;
struct test_stacktrace_build_id *skel;
int err, stack_trace_len;
__u32 key, previous_key, val, duration = 0;
struct bpf_program *prog;
struct bpf_object *obj;
struct bpf_link *link = NULL;
char buf[256];
int i, j;
struct bpf_stack_build_id id_offs[PERF_MAX_STACK_DEPTH];
@ -18,43 +18,24 @@ void test_stacktrace_build_id(void)
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))
skel = test_stacktrace_build_id__open_and_load(&stacktrace_build_id_embed);
if (CHECK(!skel, "skel_open_and_load", "skeleton open/load failed\n"))
return;
prog = bpf_object__find_program_by_title(obj, prog_name);
if (CHECK(!prog, "find_prog", "prog '%s' not found\n", prog_name))
goto close_prog;
link = bpf_program__attach_tracepoint(prog, "random", "urandom_read");
if (CHECK(IS_ERR(link), "attach_tp", "err %ld\n", PTR_ERR(link)))
goto close_prog;
err = test_stacktrace_build_id__attach(skel);
if (CHECK(err, "attach_tp", "err %d\n", err))
goto cleanup;
/* 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;
control_map_fd = bpf_map__fd(skel->maps.control_map);
stackid_hmap_fd = bpf_map__fd(skel->maps.stackid_hmap);
stackmap_fd = bpf_map__fd(skel->maps.stackmap);
stack_amap_fd = bpf_map__fd(skel->maps.stack_amap);
if (CHECK_FAIL(system("dd if=/dev/urandom of=/dev/zero count=4 2> /dev/null")))
goto disable_pmu;
goto cleanup;
if (CHECK_FAIL(system("./urandom_read")))
goto disable_pmu;
goto cleanup;
/* disable stack trace collection */
key = 0;
val = 1;
@ -66,23 +47,23 @@ void test_stacktrace_build_id(void)
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;
goto cleanup;
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;
goto cleanup;
err = extract_build_id(buf, 256);
if (CHECK(err, "get build_id with readelf",
"err %d errno %d\n", err, errno))
goto disable_pmu;
goto cleanup;
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;
goto cleanup;
do {
char build_id[64];
@ -90,7 +71,7 @@ void test_stacktrace_build_id(void)
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;
goto cleanup;
for (i = 0; i < PERF_MAX_STACK_DEPTH; ++i)
if (id_offs[i].status == BPF_STACK_BUILD_ID_VALID &&
id_offs[i].offset != 0) {
@ -108,8 +89,7 @@ void test_stacktrace_build_id(void)
* try it one more time.
*/
if (build_id_matches < 1 && retry--) {
bpf_link__destroy(link);
bpf_object__close(obj);
test_stacktrace_build_id__destroy(skel);
printf("%s:WARN:Didn't find expected build ID from the map, retrying\n",
__func__);
goto retry;
@ -117,17 +97,14 @@ void test_stacktrace_build_id(void)
if (CHECK(build_id_matches < 1, "build id match",
"Didn't find expected build ID from the map\n"))
goto disable_pmu;
goto cleanup;
stack_trace_len = PERF_MAX_STACK_DEPTH
* sizeof(struct bpf_stack_build_id);
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:
bpf_link__destroy(link);
close_prog:
bpf_object__close(obj);
cleanup:
test_stacktrace_build_id__destroy(skel);
}

84
tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c
View File

@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "test_stacktrace_build_id.skel.h"
static __u64 read_perf_max_sample_freq(void)
{
@ -14,21 +15,19 @@ static __u64 read_perf_max_sample_freq(void)
return sample_freq;
}
BPF_EMBED_OBJ_DECLARE(stacktrace_build_id);
void test_stacktrace_build_id_nmi(void)
{
int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
const char *prog_name = "tracepoint/random/urandom_read";
const char *file = "./test_stacktrace_build_id.o";
int err, pmu_fd, prog_fd;
int control_map_fd, stackid_hmap_fd, stackmap_fd;
struct test_stacktrace_build_id *skel;
int err, pmu_fd;
struct perf_event_attr attr = {
.freq = 1,
.type = PERF_TYPE_HARDWARE,
.config = PERF_COUNT_HW_CPU_CYCLES,
};
__u32 key, previous_key, val, duration = 0;
struct bpf_program *prog;
struct bpf_object *obj;
struct bpf_link *link;
char buf[256];
int i, j;
struct bpf_stack_build_id id_offs[PERF_MAX_STACK_DEPTH];
@ -38,13 +37,16 @@ void test_stacktrace_build_id_nmi(void)
attr.sample_freq = read_perf_max_sample_freq();
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))
skel = test_stacktrace_build_id__open(&stacktrace_build_id_embed);
if (CHECK(!skel, "skel_open", "skeleton open failed\n"))
return;
prog = bpf_object__find_program_by_title(obj, prog_name);
if (CHECK(!prog, "find_prog", "prog '%s' not found\n", prog_name))
goto close_prog;
/* override program type */
bpf_program__set_perf_event(skel->progs.oncpu);
err = test_stacktrace_build_id__load(skel);
if (CHECK(err, "skel_load", "skeleton load failed: %d\n", err))
goto cleanup;
pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
0 /* cpu 0 */, -1 /* group id */,
@ -52,40 +54,25 @@ void test_stacktrace_build_id_nmi(void)
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;
goto cleanup;
link = bpf_program__attach_perf_event(prog, pmu_fd);
if (CHECK(IS_ERR(link), "attach_perf_event",
"err %ld\n", PTR_ERR(link))) {
skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
pmu_fd);
if (CHECK(IS_ERR(skel->links.oncpu), "attach_perf_event",
"err %ld\n", PTR_ERR(skel->links.oncpu))) {
close(pmu_fd);
goto close_prog;
goto cleanup;
}
/* 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;
control_map_fd = bpf_map__fd(skel->maps.control_map);
stackid_hmap_fd = bpf_map__fd(skel->maps.stackid_hmap);
stackmap_fd = bpf_map__fd(skel->maps.stackmap);
if (CHECK_FAIL(system("dd if=/dev/urandom of=/dev/zero count=4 2> /dev/null")))
goto disable_pmu;
goto cleanup;
if (CHECK_FAIL(system("taskset 0x1 ./urandom_read 100000")))
goto disable_pmu;
goto cleanup;
/* disable stack trace collection */
key = 0;
val = 1;
@ -97,23 +84,23 @@ void test_stacktrace_build_id_nmi(void)
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;
goto cleanup;
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;
goto cleanup;
err = extract_build_id(buf, 256);
if (CHECK(err, "get build_id with readelf",
"err %d errno %d\n", err, errno))
goto disable_pmu;
goto cleanup;
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;
goto cleanup;
do {
char build_id[64];
@ -121,7 +108,7 @@ void test_stacktrace_build_id_nmi(void)
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;
goto cleanup;
for (i = 0; i < PERF_MAX_STACK_DEPTH; ++i)
if (id_offs[i].status == BPF_STACK_BUILD_ID_VALID &&
id_offs[i].offset != 0) {
@ -139,8 +126,7 @@ void test_stacktrace_build_id_nmi(void)
* try it one more time.
*/
if (build_id_matches < 1 && retry--) {
bpf_link__destroy(link);
bpf_object__close(obj);
test_stacktrace_build_id__destroy(skel);
printf("%s:WARN:Didn't find expected build ID from the map, retrying\n",
__func__);
goto retry;
@ -148,7 +134,7 @@ void test_stacktrace_build_id_nmi(void)
if (CHECK(build_id_matches < 1, "build id match",
"Didn't find expected build ID from the map\n"))
goto disable_pmu;
goto cleanup;
/*
* We intentionally skip compare_stack_ips(). This is because we
@ -157,8 +143,6 @@ void test_stacktrace_build_id_nmi(void)
* BPF_STACK_BUILD_ID_IP;
*/
disable_pmu:
bpf_link__destroy(link);
close_prog:
bpf_object__close(obj);
cleanup:
test_stacktrace_build_id__destroy(skel);
}