tools/perf/util/trace-event-parse.c

File Facts

System

Linux kernel

Corpus path

tools/perf/util/trace-event-parse.c

Extension

.c

Size

7058 bytes

Lines

324

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

• stdio.h
• stdlib.h
• string.h
• errno.h
• debug.h
• trace-event.h
• linux/ctype.h
• linux/kernel.h
• event-parse.h

Detected Declarations

• struct flag
• function Copyright
• function common_lock_depth
• function common_flags
• function common_pc
• function raw_field_value
• function read_size
• function event_format__fprintf
• function find_arg_field
• function test_flags
• function search_op
• function parse_ftrace_printk
• function parse_saved_cmdline
• function parse_ftrace_file
• function parse_event_file
• function eval_flag

Annotated Snippet

struct flag {
	const char *name;
	unsigned long long value;
};

static const struct flag flags[] = {
	{ "HI_SOFTIRQ", 0 },
	{ "TIMER_SOFTIRQ", 1 },
	{ "NET_TX_SOFTIRQ", 2 },
	{ "NET_RX_SOFTIRQ", 3 },
	{ "BLOCK_SOFTIRQ", 4 },
	{ "IRQ_POLL_SOFTIRQ", 5 },
	{ "TASKLET_SOFTIRQ", 6 },
	{ "SCHED_SOFTIRQ", 7 },
	{ "HRTIMER_SOFTIRQ", 8 },
	{ "RCU_SOFTIRQ", 9 },

	{ "HRTIMER_NORESTART", 0 },
	{ "HRTIMER_RESTART", 1 },
};

unsigned long long eval_flag(const char *flag)
{
	int i;

	/*
	 * Some flags in the format files do not get converted.
	 * If the flag is not numeric, see if it is something that
	 * we already know about.
	 */
	if (isdigit(flag[0]))
		return strtoull(flag, NULL, 0);

	for (i = 0; i < (int)(ARRAY_SIZE(flags)); i++)
		if (strcmp(flags[i].name, flag) == 0)
			return flags[i].value;

	return 0;
}

Annotation

• Immediate include surface: `stdio.h`, `stdlib.h`, `string.h`, `errno.h`, `debug.h`, `trace-event.h`, `linux/ctype.h`, `linux/kernel.h`.
• Detected declarations: `struct flag`, `function Copyright`, `function common_lock_depth`, `function common_flags`, `function common_pc`, `function raw_field_value`, `function read_size`, `function event_format__fprintf`, `function find_arg_field`, `function test_flags`.
• 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.