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selftests/bpf: Refactor stacktrace_map case with skeleton

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The loading method of the stacktrace_map test case looks too outdated,
refactor it with skeleton, and we can use global variable feature in
the next patch.

Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250925175030.1615837-2-chen.dylane@linux.dev
This commit is contained in:
Tao Chen 2025-09-26 01:50:29 +08:00 committed by Andrii Nakryiko
parent 17f0d1f632
commit 363b17e273
3 changed files with 18 additions and 40 deletions
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56
tools/testing/selftests/bpf/prog_tests/stacktrace_map.c
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@ -1,46 +1,26 @@
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "stacktrace_map.skel.h"
void test_stacktrace_map(void)
{
struct stacktrace_map *skel;
int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
const char *prog_name = "oncpu";
int err, prog_fd, stack_trace_len;
const char *file = "./test_stacktrace_map.bpf.o";
int err, stack_trace_len;
__u32 key, val, duration = 0;
struct bpf_program *prog;
struct bpf_object *obj;
struct bpf_link *link;
err = bpf_prog_test_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
skel = stacktrace_map__open_and_load();
if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
return;
prog = bpf_object__find_program_by_name(obj, prog_name);
if (CHECK(!prog, "find_prog", "prog '%s' not found\n", prog_name))
goto close_prog;
link = bpf_program__attach_tracepoint(prog, "sched", "sched_switch");
if (!ASSERT_OK_PTR(link, "attach_tp"))
goto close_prog;
/* find map fds */
control_map_fd = bpf_find_map(__func__, obj, "control_map");
if (CHECK_FAIL(control_map_fd < 0))
goto disable_pmu;
stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
if (CHECK_FAIL(stackid_hmap_fd < 0))
goto disable_pmu;
stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
if (CHECK_FAIL(stackmap_fd < 0))
goto disable_pmu;
stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
if (CHECK_FAIL(stack_amap_fd < 0))
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);
err = stacktrace_map__attach(skel);
if (!ASSERT_OK(err, "skel_attach"))
goto out;
/* give some time for bpf program run */
sleep(1);
@ -55,21 +35,19 @@ void test_stacktrace_map(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 out;
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 out;
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;
goto out;
disable_pmu:
bpf_link__destroy(link);
close_prog:
bpf_object__close(obj);
out:
stacktrace_map__destroy(skel);
}

2
tools/testing/selftests/bpf/prog_tests/stacktrace_map_raw_tp.c
View File

@ -5,7 +5,7 @@ void test_stacktrace_map_raw_tp(void)
{
const char *prog_name = "oncpu";
int control_map_fd, stackid_hmap_fd, stackmap_fd;
const char *file = "./test_stacktrace_map.bpf.o";
const char *file = "./stacktrace_map.bpf.o";
__u32 key, val, duration = 0;
int err, prog_fd;
struct bpf_program *prog;

0
tools/testing/selftests/bpf/progs/test_stacktrace_map.c → tools/testing/selftests/bpf/progs/stacktrace_map.c
View File