tools/testing/selftests/bpf/progs/test_attach_probe.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_attach_probe.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_attach_probe.c
Extension
.c
Size
4386 bytes
Lines
184
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
// Copyright (c) 2017 Facebook

#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <bpf/bpf_core_read.h>
#include <errno.h>
#include "bpf_misc.h"

u32 dynamic_sz = 1;
int kprobe2_res = 0;
int kretprobe2_res = 0;
int uprobe_byname_res = 0;
int uretprobe_byname_res = 0;
int uprobe_byname2_res = 0;
int uretprobe_byname2_res = 0;
int uprobe_byname3_sleepable_res = 0;
int uprobe_byname3_str_sleepable_res = 0;
int uprobe_byname3_res = 0;
int uretprobe_byname3_sleepable_res = 0;
int uretprobe_byname3_str_sleepable_res = 0;
int uretprobe_byname3_res = 0;
void *user_ptr = 0;

int bpf_copy_from_user_str(void *dst, u32, const void *, u64) __weak __ksym;

SEC("ksyscall/nanosleep")
int BPF_KSYSCALL(handle_kprobe_auto, struct __kernel_timespec *req, struct __kernel_timespec *rem)
{
	kprobe2_res = 11;
	return 0;
}

SEC("kretsyscall/nanosleep")
int BPF_KRETPROBE(handle_kretprobe_auto, int ret)
{
	kretprobe2_res = 22;
	return ret;
}

SEC("uprobe")
int handle_uprobe_ref_ctr(struct pt_regs *ctx)
{
	return 0;
}

SEC("uretprobe")
int handle_uretprobe_ref_ctr(struct pt_regs *ctx)
{
	return 0;
}

SEC("uprobe")
int handle_uprobe_byname(struct pt_regs *ctx)
{
	uprobe_byname_res = 5;
	return 0;
}

/* use auto-attach format for section definition. */
SEC("uretprobe//proc/self/exe:trigger_func2")
int handle_uretprobe_byname(struct pt_regs *ctx)
{
	uretprobe_byname_res = 6;
	return 0;
}

SEC("uprobe")
int BPF_UPROBE(handle_uprobe_byname2, const char *pathname, const char *mode)
{
	char mode_buf[2] = {};

	/* verify fopen mode */
	bpf_probe_read_user(mode_buf, sizeof(mode_buf), mode);
	if (mode_buf[0] == 'r' && mode_buf[1] == 0)
		uprobe_byname2_res = 7;
	return 0;
}

SEC("uretprobe")
int BPF_URETPROBE(handle_uretprobe_byname2, void *ret)
{
	uretprobe_byname2_res = 8;
	return 0;
}

static __always_inline bool verify_sleepable_user_copy(void)
{
	char data[9];

Annotation

Implementation Notes