tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.c
Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.c
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.c- Extension
.c- Size
- 1028 bytes
- Lines
- 48
- 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.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
vmlinux.hbpf/bpf_helpers.hbpf/bpf_tracing.hstdbool.h
Detected Declarations
function check_cookiefunction uprobe_1function uprobe_2function uprobe_3
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <stdbool.h>
char _license[] SEC("license") = "GPL";
int pid = 0;
__u64 test_uprobe_1_result = 0;
__u64 test_uprobe_2_result = 0;
__u64 test_uprobe_3_result = 0;
static int check_cookie(struct pt_regs *ctx, __u64 val, __u64 *result)
{
__u64 *cookie;
if (bpf_get_current_pid_tgid() >> 32 != pid)
return 1;
cookie = bpf_session_cookie(ctx);
if (bpf_session_is_return(ctx))
*result = *cookie == val ? val : 0;
else
*cookie = val;
return 0;
}
SEC("uprobe.session//proc/self/exe:uprobe_multi_func_1")
int uprobe_1(struct pt_regs *ctx)
{
return check_cookie(ctx, 1, &test_uprobe_1_result);
}
SEC("uprobe.session//proc/self/exe:uprobe_multi_func_2")
int uprobe_2(struct pt_regs *ctx)
{
return check_cookie(ctx, 2, &test_uprobe_2_result);
}
SEC("uprobe.session//proc/self/exe:uprobe_multi_func_3")
int uprobe_3(struct pt_regs *ctx)
{
return check_cookie(ctx, 3, &test_uprobe_3_result);
}
Annotation
- Immediate include surface: `vmlinux.h`, `bpf/bpf_helpers.h`, `bpf/bpf_tracing.h`, `stdbool.h`.
- Detected declarations: `function check_cookie`, `function uprobe_1`, `function uprobe_2`, `function uprobe_3`.
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.