更新日期: 2022/06/01 来源: https://gitee.com/weharmony/kernel_liteos_a_note
main.c
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1/*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <stdio.h>
33#include <string.h>
34#include <sys/types.h>
35#include <sys/stat.h>
36#include <fcntl.h>
37#include <unistd.h>
38#include <stdlib.h>
39#include "perf.h"
40#include "perf_list.h"
41#include "perf_stat.h"
42#include "perf_record.h"
43
44int main(int argc, char **argv)
45{
46#define TWO_ARGS 2
47#define THREE_ARGS 3
48 int fd = open("/dev/perf", O_RDWR);
49 if (fd == -1) {
50 printf("Perf open failed.\n");
51 exit(EXIT_FAILURE);
52 }
53
54 if (argc == 1) {
55 PerfUsage();
56 } else if ((argc == TWO_ARGS) && strcmp(argv[1], "start") == 0) {
57 PerfStart(fd, 0);
58 } else if ((argc == THREE_ARGS) && strcmp(argv[1], "start") == 0) {
59 size_t id = strtoul(argv[THREE_ARGS - 1], NULL, 0);
60 PerfStart(fd, id);
61 } else if ((argc == TWO_ARGS) && strcmp(argv[1], "stop") == 0) {
62 PerfStop(fd);
63 } else if ((argc == THREE_ARGS) && strcmp(argv[1], "read") == 0) {
64 size_t size = strtoul(argv[THREE_ARGS - 1], NULL, 0);
65 if (size <= 0) {
66 goto EXIT:
67 }
68
69 char *buf = (char *)malloc(size);
70 if (buf != NULL) {
71 int len = PerfRead(fd, buf, size);
72 PerfPrintBuffer(buf, len);
73 free(buf);
74 buf = NULL;
75 }
76 } else if ((argc == TWO_ARGS) && strcmp(argv[1], "list") == 0) {
77 PerfList();
78 } else if ((argc >= THREE_ARGS) && strcmp(argv[1], "stat") == 0) {
79 PerfStat(fd, argc, argv);
80 } else if ((argc >= THREE_ARGS) && strcmp(argv[1], "record") == 0) {
81 PerfRecord(fd, argc, argv);
82 } else {
83 printf("Unsupported perf command.\n");
84 PerfUsage();
85 }
86
87EXIT:
88 close(fd);
89 return 0;
90}
void PerfUsage(void)
Definition: perf.c:44
void PerfStart(int fd, size_t sectionId)
Definition: perf.c:106
void PerfPrintBuffer(const char *buf, ssize_t num)
Definition: perf.c:70
ssize_t PerfRead(int fd, char *buf, size_t size)
Definition: perf.c:126
void PerfStop(int fd)
Definition: perf.c:111
int main(int argc, char **argv)
Definition: main.c:44
void * malloc(size_t size)
动态分配内存块大小
Definition: malloc.c:81
void free(void *ptr)
释放ptr所指向的内存空间
Definition: malloc.c:66
void PerfList(void)
Definition: perf_list.c:121
void PerfRecord(int fd, int argc, char **argv)
Definition: perf_record.c:146
void PerfStat(int fd, int argc, char **argv)
Definition: perf_stat.c:107
void exit(int status)
Definition: stdlib.c:60