tools/perf/arch/riscv/util/header.c

Source file repositories/reference/linux-study-clean/tools/perf/arch/riscv/util/header.c

File Facts

System
Linux kernel
Corpus path
tools/perf/arch/riscv/util/header.c
Extension
.c
Size
1921 bytes
Lines
105
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

if (!strncmp(line, CPUINFO_MVEN, strlen(CPUINFO_MVEN))) {
			mvendorid = _get_field(line);
			if (!mvendorid)
				goto free;
		} else if (!strncmp(line, CPUINFO_MARCH, strlen(CPUINFO_MARCH))) {
			marchid = _get_field(line);
			if (!marchid)
				goto free;
		} else if (!strncmp(line, CPUINFO_MIMP, strlen(CPUINFO_MIMP))) {
			mimpid = _get_field(line);
			if (!mimpid)
				goto free;

			break;
		}
	}

	if (!mvendorid || !marchid || !mimpid)
		goto free;

	if (asprintf(&cpuid, "%s-%s-%s", mvendorid, marchid, mimpid) < 0)
		cpuid = NULL;

free:
	fclose(cpuinfo);
	free(mvendorid);
	free(marchid);
	free(mimpid);

	return cpuid;
}

int get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused)
{
	char *cpuid = _get_cpuid();
	int ret = 0;

	if (sz < strlen(cpuid)) {
		ret = -EINVAL;
		goto free;
	}

	scnprintf(buffer, sz, "%s", cpuid);
free:
	free(cpuid);
	return ret;
}

char *
get_cpuid_str(struct perf_cpu cpu __maybe_unused)
{
	return _get_cpuid();
}

Annotation

Implementation Notes