tools/perf/tests/hists_common.c

Source file repositories/reference/linux-study-clean/tools/perf/tests/hists_common.c

File Facts

System
Linux kernel
Corpus path
tools/perf/tests/hists_common.c
Extension
.c
Size
5351 bytes
Lines
224
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

struct fake_sym {
	u64 start;
	u64 length;
	const char *name;
};

static struct fake_sym perf_syms[] = {
	{ FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "main" },
	{ FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "run_command" },
	{ FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "cmd_record" },
};

static struct fake_sym bash_syms[] = {
	{ FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "main" },
	{ FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "xmalloc" },
	{ FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "xfree" },
};

static struct fake_sym libc_syms[] = {
	{ 700, 100, "malloc" },
	{ 800, 100, "free" },
	{ 900, 100, "realloc" },
	{ FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "malloc" },
	{ FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "free" },
	{ FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "realloc" },
};

static struct fake_sym kernel_syms[] = {
	{ FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "schedule" },
	{ FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "page_fault" },
	{ FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "sys_perf_event_open" },
};

static struct {
	const char *dso_name;
	struct fake_sym *syms;
	size_t nr_syms;
} fake_symbols[] = {
	{ "perf", perf_syms, ARRAY_SIZE(perf_syms) },
	{ "bash", bash_syms, ARRAY_SIZE(bash_syms) },
	{ "libc", libc_syms, ARRAY_SIZE(libc_syms) },
	{ "[kernel]", kernel_syms, ARRAY_SIZE(kernel_syms) },
};

struct machine *setup_fake_machine(struct machines *machines)
{
	struct machine *machine = machines__find(machines, HOST_KERNEL_ID);
	size_t i;

	if (machine == NULL) {
		pr_debug("Not enough memory for machine setup\n");
		return NULL;
	}

	for (i = 0; i < ARRAY_SIZE(fake_threads); i++) {
		struct thread *thread;

		thread = machine__findnew_thread(machine, fake_threads[i].pid,
						 fake_threads[i].pid);
		if (thread == NULL)
			goto out;

		thread__set_comm(thread, fake_threads[i].comm, 0);
		thread__put(thread);
	}

	for (i = 0; i < ARRAY_SIZE(fake_mmap_info); i++) {
		struct perf_sample sample = {
			.cpumode = PERF_RECORD_MISC_USER,
		};
		union perf_event fake_mmap_event = {
			.mmap = {
				.pid = fake_mmap_info[i].pid,
				.tid = fake_mmap_info[i].pid,
				.start = fake_mmap_info[i].start,
				.len = FAKE_MAP_LENGTH,
				.pgoff = 0ULL,
			},
		};

		strcpy(fake_mmap_event.mmap.filename,
		       fake_mmap_info[i].filename);

		machine__process_mmap_event(machine, &fake_mmap_event, &sample);
	}

	for (i = 0; i < ARRAY_SIZE(fake_symbols); i++) {
		size_t k;
		struct dso *dso;

Annotation

Implementation Notes