1 /*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "Trace"
18 // #define LOG_NDEBUG 0
19
20 #include <JNIHelp.h>
21 #include <ScopedUtfChars.h>
22 #include <ScopedStringChars.h>
23
24 #include <utils/String8.h>
25
26 #include <cutils/trace.h>
27 #include <cutils/log.h>
28
29 namespace android {
30
sanitizeString(String8 & utf8Chars)31 static void sanitizeString(String8& utf8Chars) {
32 size_t size = utf8Chars.size();
33 char* str = utf8Chars.lockBuffer(size);
34 for (size_t i = 0; i < size; i++) {
35 char c = str[i];
36 if (c == '\0' || c == '\n' || c == '|') {
37 str[i] = ' ';
38 }
39 }
40 utf8Chars.unlockBuffer();
41 }
42
android_os_Trace_nativeGetEnabledTags(JNIEnv * env,jclass clazz)43 static jlong android_os_Trace_nativeGetEnabledTags(JNIEnv* env, jclass clazz) {
44 return atrace_get_enabled_tags();
45 }
46
android_os_Trace_nativeTraceCounter(JNIEnv * env,jclass clazz,jlong tag,jstring nameStr,jint value)47 static void android_os_Trace_nativeTraceCounter(JNIEnv* env, jclass clazz,
48 jlong tag, jstring nameStr, jint value) {
49 ScopedUtfChars name(env, nameStr);
50
51 ALOGV("%s: %lld %s %d", __FUNCTION__, tag, name.c_str(), value);
52 atrace_int(tag, name.c_str(), value);
53 }
54
android_os_Trace_nativeTraceBegin(JNIEnv * env,jclass clazz,jlong tag,jstring nameStr)55 static void android_os_Trace_nativeTraceBegin(JNIEnv* env, jclass clazz,
56 jlong tag, jstring nameStr) {
57 const size_t MAX_SECTION_NAME_LEN = 127;
58 ScopedStringChars jchars(env, nameStr);
59 String8 utf8Chars(reinterpret_cast<const char16_t*>(jchars.get()), jchars.size());
60 sanitizeString(utf8Chars);
61
62 ALOGV("%s: %lld %s", __FUNCTION__, tag, utf8Chars.string());
63 atrace_begin(tag, utf8Chars.string());
64 }
65
android_os_Trace_nativeTraceEnd(JNIEnv * env,jclass clazz,jlong tag)66 static void android_os_Trace_nativeTraceEnd(JNIEnv* env, jclass clazz,
67 jlong tag) {
68
69 ALOGV("%s: %lld", __FUNCTION__, tag);
70 atrace_end(tag);
71 }
72
android_os_Trace_nativeAsyncTraceBegin(JNIEnv * env,jclass clazz,jlong tag,jstring nameStr,jint cookie)73 static void android_os_Trace_nativeAsyncTraceBegin(JNIEnv* env, jclass clazz,
74 jlong tag, jstring nameStr, jint cookie) {
75 const size_t MAX_SECTION_NAME_LEN = 127;
76 ScopedStringChars jchars(env, nameStr);
77 String8 utf8Chars(reinterpret_cast<const char16_t*>(jchars.get()), jchars.size());
78 sanitizeString(utf8Chars);
79
80 ALOGV("%s: %lld %s %d", __FUNCTION__, tag, utf8Chars.string(), cookie);
81 atrace_async_begin(tag, utf8Chars.string(), cookie);
82 }
83
android_os_Trace_nativeAsyncTraceEnd(JNIEnv * env,jclass clazz,jlong tag,jstring nameStr,jint cookie)84 static void android_os_Trace_nativeAsyncTraceEnd(JNIEnv* env, jclass clazz,
85 jlong tag, jstring nameStr, jint cookie) {
86 const size_t MAX_SECTION_NAME_LEN = 127;
87 ScopedStringChars jchars(env, nameStr);
88 String8 utf8Chars(reinterpret_cast<const char16_t*>(jchars.get()), jchars.size());
89 sanitizeString(utf8Chars);
90
91 ALOGV("%s: %lld %s %d", __FUNCTION__, tag, utf8Chars.string(), cookie);
92 atrace_async_end(tag, utf8Chars.string(), cookie);
93 }
94
android_os_Trace_nativeSetAppTracingAllowed(JNIEnv * env,jclass clazz,jboolean allowed)95 static void android_os_Trace_nativeSetAppTracingAllowed(JNIEnv* env,
96 jclass clazz, jboolean allowed) {
97 ALOGV("%s: %d", __FUNCTION__, allowed);
98
99 atrace_set_debuggable(allowed);
100 }
101
android_os_Trace_nativeSetTracingEnabled(JNIEnv * env,jclass clazz,jboolean enabled)102 static void android_os_Trace_nativeSetTracingEnabled(JNIEnv* env,
103 jclass clazz, jboolean enabled) {
104 ALOGV("%s: %d", __FUNCTION__, enabled);
105
106 atrace_set_tracing_enabled(enabled);
107 }
108
109 static JNINativeMethod gTraceMethods[] = {
110 /* name, signature, funcPtr */
111 { "nativeGetEnabledTags",
112 "()J",
113 (void*)android_os_Trace_nativeGetEnabledTags },
114 { "nativeTraceCounter",
115 "(JLjava/lang/String;I)V",
116 (void*)android_os_Trace_nativeTraceCounter },
117 { "nativeTraceBegin",
118 "(JLjava/lang/String;)V",
119 (void*)android_os_Trace_nativeTraceBegin },
120 { "nativeTraceEnd",
121 "(J)V",
122 (void*)android_os_Trace_nativeTraceEnd },
123 { "nativeAsyncTraceBegin",
124 "(JLjava/lang/String;I)V",
125 (void*)android_os_Trace_nativeAsyncTraceBegin },
126 { "nativeAsyncTraceEnd",
127 "(JLjava/lang/String;I)V",
128 (void*)android_os_Trace_nativeAsyncTraceEnd },
129 { "nativeSetAppTracingAllowed",
130 "(Z)V",
131 (void*)android_os_Trace_nativeSetAppTracingAllowed },
132 { "nativeSetTracingEnabled",
133 "(Z)V",
134 (void*)android_os_Trace_nativeSetTracingEnabled },
135 };
136
register_android_os_Trace(JNIEnv * env)137 int register_android_os_Trace(JNIEnv* env) {
138 int res = jniRegisterNativeMethods(env, "android/os/Trace",
139 gTraceMethods, NELEM(gTraceMethods));
140 LOG_FATAL_IF(res < 0, "Unable to register native methods.");
141
142 return 0;
143 }
144
145 } // namespace android
146