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

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c
Extension
.c
Size
21453 bytes
Lines
754
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <sys/prctl.h>
#include <test_progs.h>
#include "kprobe_multi.skel.h"
#include "trace_helpers.h"
#include "kprobe_multi_empty.skel.h"
#include "kprobe_multi_override.skel.h"
#include "kprobe_multi_session.skel.h"
#include "kprobe_multi_session_cookie.skel.h"
#include "kprobe_multi_verifier.skel.h"
#include "kprobe_write_ctx.skel.h"
#include "kprobe_multi_sleepable.skel.h"
#include "bpf/libbpf_internal.h"
#include "bpf/hashmap.h"

static void kprobe_multi_test_run(struct kprobe_multi *skel, bool test_return)
{
	LIBBPF_OPTS(bpf_test_run_opts, topts);
	int err, prog_fd;

	prog_fd = bpf_program__fd(skel->progs.trigger);
	err = bpf_prog_test_run_opts(prog_fd, &topts);
	ASSERT_OK(err, "test_run");
	ASSERT_EQ(topts.retval, 0, "test_run");

	ASSERT_EQ(skel->bss->kprobe_test1_result, 1, "kprobe_test1_result");
	ASSERT_EQ(skel->bss->kprobe_test2_result, 1, "kprobe_test2_result");
	ASSERT_EQ(skel->bss->kprobe_test3_result, 1, "kprobe_test3_result");
	ASSERT_EQ(skel->bss->kprobe_test4_result, 1, "kprobe_test4_result");
	ASSERT_EQ(skel->bss->kprobe_test5_result, 1, "kprobe_test5_result");
	ASSERT_EQ(skel->bss->kprobe_test6_result, 1, "kprobe_test6_result");
	ASSERT_EQ(skel->bss->kprobe_test7_result, 1, "kprobe_test7_result");
	ASSERT_EQ(skel->bss->kprobe_test8_result, 1, "kprobe_test8_result");

	if (test_return) {
		ASSERT_EQ(skel->bss->kretprobe_test1_result, 1, "kretprobe_test1_result");
		ASSERT_EQ(skel->bss->kretprobe_test2_result, 1, "kretprobe_test2_result");
		ASSERT_EQ(skel->bss->kretprobe_test3_result, 1, "kretprobe_test3_result");
		ASSERT_EQ(skel->bss->kretprobe_test4_result, 1, "kretprobe_test4_result");
		ASSERT_EQ(skel->bss->kretprobe_test5_result, 1, "kretprobe_test5_result");
		ASSERT_EQ(skel->bss->kretprobe_test6_result, 1, "kretprobe_test6_result");
		ASSERT_EQ(skel->bss->kretprobe_test7_result, 1, "kretprobe_test7_result");
		ASSERT_EQ(skel->bss->kretprobe_test8_result, 1, "kretprobe_test8_result");
	}
}

static void test_skel_api(void)
{
	struct kprobe_multi *skel = NULL;
	int err;

	skel = kprobe_multi__open_and_load();
	if (!ASSERT_OK_PTR(skel, "kprobe_multi__open_and_load"))
		goto cleanup;

	skel->bss->pid = getpid();
	err = kprobe_multi__attach(skel);
	if (!ASSERT_OK(err, "kprobe_multi__attach"))
		goto cleanup;

	kprobe_multi_test_run(skel, true);

cleanup:
	kprobe_multi__destroy(skel);
}

static void test_link_api(struct bpf_link_create_opts *opts)
{
	int prog_fd, link1_fd = -1, link2_fd = -1;
	struct kprobe_multi *skel = NULL;

	skel = kprobe_multi__open_and_load();
	if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load"))
		goto cleanup;

	skel->bss->pid = getpid();
	prog_fd = bpf_program__fd(skel->progs.test_kprobe);
	link1_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts);
	if (!ASSERT_GE(link1_fd, 0, "link_fd"))
		goto cleanup;

	opts->kprobe_multi.flags = BPF_F_KPROBE_MULTI_RETURN;
	prog_fd = bpf_program__fd(skel->progs.test_kretprobe);
	link2_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts);
	if (!ASSERT_GE(link2_fd, 0, "link_fd"))
		goto cleanup;

	kprobe_multi_test_run(skel, true);

Annotation

Implementation Notes