1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ld_log.h"
17
18 static bool ld_log_enable = false;
19 static bool ld_dlclose_debug = false;
20 static bool ld_dlopen_debug = false;
21
22 #ifdef OHOS_ENABLE_PARAMETER
23 #include <fcntl.h>
24 #include <stdint.h>
25 #include <string.h>
26 #include <sys/prctl.h>
27 #include <unistd.h>
28
29 #include "sys_param.h"
30
31 #define SYSPARAM_LENGTH 32
32 #define PROCESS_NAME_LEN 1024
33
get_app_name(char * buf,size_t length)34 static char *get_app_name(char *buf, size_t length)
35 {
36 char *app = NULL;
37 int fd = open("/proc/self/cmdline", O_RDONLY);
38 if (fd != -1) {
39 ssize_t ret = read(fd, buf, length - 1);
40 if (ret != -1) {
41 buf[ret] = 0;
42 app = strrchr(buf, '/');
43 if (app) {
44 app++;
45 } else {
46 app = buf;
47 }
48 char *app_end = strchr(app, ':');
49 if (app_end) {
50 *app_end = 0;
51 }
52 }
53 close(fd);
54 }
55 return app;
56 }
57
get_ld_log_value()58 static bool get_ld_log_value()
59 {
60 char buf[PROCESS_NAME_LEN];
61 char *path = get_app_name(buf, PROCESS_NAME_LEN);
62 if (!path) {
63 return false;
64 }
65
66 char app_param_name[PROCESS_NAME_LEN] = "musl.log.ld.app.";
67 strcat(app_param_name, path);
68 static CachedHandle app_param_handle = NULL;
69 static CachedHandle all_param_handle = NULL;
70 if (app_param_handle == NULL) {
71 app_param_handle = CachedParameterCreate(app_param_name, "false");
72 }
73 if (all_param_handle == NULL) {
74 all_param_handle = CachedParameterCreate("musl.log.ld.all", "false");
75 }
76 return (get_bool_sysparam(app_param_handle) || get_bool_sysparam(all_param_handle));
77 }
78
get_ld_debug_dlclose_value()79 static bool get_ld_debug_dlclose_value()
80 {
81 static CachedHandle param_handle = NULL;
82 if (param_handle == NULL) {
83 param_handle = CachedParameterCreate("musl.ld.debug.dlclose", "false");
84 }
85 return get_bool_sysparam(param_handle);
86 }
87
get_ld_debug_dlopen_value()88 static bool get_ld_debug_dlopen_value()
89 {
90 static CachedHandle param_handle = NULL;
91 if (param_handle == NULL) {
92 param_handle = CachedParameterCreate("musl.ld.debug.dlopen", "false");
93 }
94 return get_bool_sysparam(param_handle);
95 }
96 #endif
97
ld_log_reset()98 void ld_log_reset()
99 {
100 #if (defined(OHOS_ENABLE_PARAMETER))
101 ld_dlopen_debug = get_ld_debug_dlopen_value();
102 ld_dlclose_debug = get_ld_debug_dlclose_value();
103 if (!is_musl_log_enable()) {
104 ld_log_enable = false;
105 return;
106 }
107 ld_log_enable = get_ld_log_value();
108 #else
109 ld_log_enable = is_musl_log_enable();
110 #endif
111 }
112
get_ld_log_enable()113 bool get_ld_log_enable()
114 {
115 return ld_log_enable;
116 }
117
is_dlclose_debug_enable()118 bool is_dlclose_debug_enable()
119 {
120 return ld_dlclose_debug;
121 }
122
is_dlopen_debug_enable()123 bool is_dlopen_debug_enable()
124 {
125 return ld_dlopen_debug;
126 }
127