tools/lib/perf/core.c

Source file repositories/reference/linux-study-clean/tools/lib/perf/core.c

File Facts

System
Linux kernel
Corpus path
tools/lib/perf/core.c
Extension
.c
Size
792 bytes
Lines
39
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-only

#define __printf(a, b)  __attribute__((format(printf, a, b)))

#include <stdio.h>
#include <stdarg.h>
#include <unistd.h>
#include <linux/compiler.h>
#include <perf/core.h>
#include <internal/lib.h>
#include "internal.h"

static int __base_pr(enum libperf_print_level level __maybe_unused, const char *format,
		     va_list args)
{
	return vfprintf(stderr, format, args);
}

static libperf_print_fn_t __libperf_pr = __base_pr;

__printf(2, 3)
void libperf_print(enum libperf_print_level level, const char *format, ...)
{
	va_list args;

	if (!__libperf_pr)
		return;

	va_start(args, format);
	__libperf_pr(level, format, args);
	va_end(args);
}

void libperf_init(libperf_print_fn_t fn)
{
	page_size = sysconf(_SC_PAGE_SIZE);
	__libperf_pr = fn;
}

Annotation

Implementation Notes