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eb31228b1d
Fix the following coccicheck warning: tools/perf/util/trace-event-parse.c:209:35-36: WARNING: Use ARRAY_SIZE ARRAY_SIZE(arr) is a macro provided in tools/include/linux/kernel.h, which not only measures the size of the array, but also makes sure that `arr` is really an array. It has been tested with gcc (Debian 8.3.0-6) 8.3.0. Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20220307034008.4024-1-guozhengkui@vivo.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
215 lines
4.4 KiB
C
215 lines
4.4 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 "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_print_event(event->tep, &s, &record, "%s", TEP_PRINT_INFO);
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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 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)(ARRAY_SIZE(flags)); 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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