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synced 2024-09-06 02:50:43 +00:00
![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
We got the sane_ctype.h headers from git and kept using it so far, but since that code originally came from the kernel sources to the git sources, perhaps its better to just use the one in the kernel, so that we can leverage tools/perf/check_headers.sh to be notified when our copy gets out of sync, i.e. when fixes or goodies are added to the code we've copied. This will help with things like tools/lib/string.c where we want to have more things in common with the kernel, such as strim(), skip_spaces(), etc so as to go on removing the things that we have in tools/perf/util/ and instead using the code in the kernel, indirectly and removing things like EXPORT_SYMBOL(), etc, getting notified when fixes and improvements are made to the original code. Hopefully this also should help with reducing the difference of code hosted in tools/ to the one in the kernel proper. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-7k9868l713wqtgo01xxygn12@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
246 lines
5 KiB
C
246 lines
5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "../perf.h"
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#include "debug.h"
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#include "trace-event.h"
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#include <linux/ctype.h>
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static int get_common_field(struct scripting_context *context,
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int *offset, int *size, const char *type)
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{
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struct tep_handle *pevent = context->pevent;
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struct tep_event *event;
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struct tep_format_field *field;
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if (!*size) {
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event = tep_get_first_event(pevent);
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if (!event)
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return 0;
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field = tep_find_common_field(event, type);
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if (!field)
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return 0;
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*offset = field->offset;
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*size = field->size;
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}
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return tep_read_number(pevent, context->event_data + *offset, *size);
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}
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int common_lock_depth(struct scripting_context *context)
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{
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static int offset;
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static int size;
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int ret;
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ret = get_common_field(context, &size, &offset,
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"common_lock_depth");
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if (ret < 0)
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return -1;
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return ret;
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}
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int common_flags(struct scripting_context *context)
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{
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static int offset;
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static int size;
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int ret;
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ret = get_common_field(context, &size, &offset,
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"common_flags");
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if (ret < 0)
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return -1;
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return ret;
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}
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int common_pc(struct scripting_context *context)
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{
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static int offset;
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static int size;
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int ret;
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ret = get_common_field(context, &size, &offset,
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"common_preempt_count");
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if (ret < 0)
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return -1;
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return ret;
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}
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unsigned long long
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raw_field_value(struct tep_event *event, const char *name, void *data)
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{
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struct tep_format_field *field;
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unsigned long long val;
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field = tep_find_any_field(event, name);
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if (!field)
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return 0ULL;
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tep_read_number_field(field, data, &val);
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return val;
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}
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unsigned long long read_size(struct tep_event *event, void *ptr, int size)
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{
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return tep_read_number(event->tep, ptr, size);
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}
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void event_format__fprintf(struct tep_event *event,
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int cpu, void *data, int size, FILE *fp)
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{
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struct tep_record record;
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struct trace_seq s;
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memset(&record, 0, sizeof(record));
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record.cpu = cpu;
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record.size = size;
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record.data = data;
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trace_seq_init(&s);
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tep_event_info(&s, event, &record);
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trace_seq_do_fprintf(&s, fp);
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trace_seq_destroy(&s);
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}
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void event_format__print(struct tep_event *event,
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int cpu, void *data, int size)
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{
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return event_format__fprintf(event, cpu, data, size, stdout);
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}
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void parse_ftrace_printk(struct tep_handle *pevent,
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char *file, unsigned int size __maybe_unused)
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{
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unsigned long long addr;
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char *printk;
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char *line;
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char *next = NULL;
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char *addr_str;
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char *fmt = NULL;
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line = strtok_r(file, "\n", &next);
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while (line) {
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addr_str = strtok_r(line, ":", &fmt);
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if (!addr_str) {
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pr_warning("printk format with empty entry");
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break;
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}
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addr = strtoull(addr_str, NULL, 16);
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/* fmt still has a space, skip it */
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printk = strdup(fmt+1);
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line = strtok_r(NULL, "\n", &next);
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tep_register_print_string(pevent, printk, addr);
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free(printk);
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}
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}
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void parse_saved_cmdline(struct tep_handle *pevent,
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char *file, unsigned int size __maybe_unused)
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{
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char comm[17]; /* Max comm length in the kernel is 16. */
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char *line;
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char *next = NULL;
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int pid;
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line = strtok_r(file, "\n", &next);
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while (line) {
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if (sscanf(line, "%d %16s", &pid, comm) == 2)
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tep_register_comm(pevent, comm, pid);
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line = strtok_r(NULL, "\n", &next);
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}
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}
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int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size)
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{
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return tep_parse_event(pevent, buf, size, "ftrace");
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}
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int parse_event_file(struct tep_handle *pevent,
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char *buf, unsigned long size, char *sys)
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{
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return tep_parse_event(pevent, buf, size, sys);
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}
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struct tep_event *trace_find_next_event(struct tep_handle *pevent,
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struct tep_event *event)
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{
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static int idx;
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int events_count;
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struct tep_event *all_events;
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all_events = tep_get_first_event(pevent);
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events_count = tep_get_events_count(pevent);
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if (!pevent || !all_events || events_count < 1)
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return NULL;
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if (!event) {
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idx = 0;
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return all_events;
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}
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if (idx < events_count && event == (all_events + idx)) {
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idx++;
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if (idx == events_count)
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return NULL;
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return (all_events + idx);
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}
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for (idx = 1; idx < events_count; idx++) {
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if (event == (all_events + (idx - 1)))
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return (all_events + idx);
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}
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return NULL;
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}
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struct flag {
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const char *name;
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unsigned long long value;
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};
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static const struct flag flags[] = {
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{ "HI_SOFTIRQ", 0 },
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{ "TIMER_SOFTIRQ", 1 },
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{ "NET_TX_SOFTIRQ", 2 },
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{ "NET_RX_SOFTIRQ", 3 },
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{ "BLOCK_SOFTIRQ", 4 },
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{ "IRQ_POLL_SOFTIRQ", 5 },
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{ "TASKLET_SOFTIRQ", 6 },
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{ "SCHED_SOFTIRQ", 7 },
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{ "HRTIMER_SOFTIRQ", 8 },
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{ "RCU_SOFTIRQ", 9 },
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{ "HRTIMER_NORESTART", 0 },
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{ "HRTIMER_RESTART", 1 },
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};
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unsigned long long eval_flag(const char *flag)
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{
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int i;
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/*
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* Some flags in the format files do not get converted.
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* If the flag is not numeric, see if it is something that
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* we already know about.
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*/
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if (isdigit(flag[0]))
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return strtoull(flag, NULL, 0);
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for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
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if (strcmp(flags[i].name, flag) == 0)
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return flags[i].value;
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return 0;
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}
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