tools/testing/selftests/bpf/test_cpp.cpp

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/test_cpp.cpp

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/test_cpp.cpp
Extension
.cpp
Size
2804 bytes
Lines
140
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

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

if (err) {
			skel = nullptr;
			return err;
		}

		return 0;
	}

	int load() { return T::load(skel); }

	int attach() { return T::attach(skel); }

	void detach() { return T::detach(skel); }

	const T* operator->() const { return skel; }

	T* operator->() { return skel; }

	const T *get() const { return skel; }
};

static void dump_printf(void *ctx, const char *fmt, va_list args)
{
}

static void try_skeleton_template()
{
	Skeleton<test_core_extern> skel;
	std::string prog_name;
	int err;
	LIBBPF_OPTS(bpf_object_open_opts, opts);

	err = skel.open(&opts);
	if (err) {
		fprintf(stderr, "Skeleton open failed: %d\n", err);
		return;
	}

	skel->data->kern_ver = 123;
	skel->data->int_val = skel->data->ushort_val;

	err = skel.load();
	if (err) {
		fprintf(stderr, "Skeleton load failed: %d\n", err);
		return;
	}

	if (!skel->kconfig->CONFIG_BPF_SYSCALL)
		fprintf(stderr, "Seems like CONFIG_BPF_SYSCALL isn't set?!\n");

	err = skel.attach();
	if (err) {
		fprintf(stderr, "Skeleton attach failed: %d\n", err);
		return;
	}

	prog_name = bpf_program__name(skel->progs.handle_sys_enter);
	if (prog_name != "handle_sys_enter")
		fprintf(stderr, "Unexpected program name: %s\n", prog_name.c_str());

	bpf_link__destroy(skel->links.handle_sys_enter);
	skel->links.handle_sys_enter = bpf_program__attach(skel->progs.handle_sys_enter);

	skel.detach();

	/* destructor will destroy underlying skeleton */
}

int main(int argc, char *argv[])
{

Annotation

Implementation Notes