| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <jni.h> |
| |
| #include <cutils/trace.h> |
| #include <log/log.h> |
| #include <nativehelper/JNIHelp.h> |
| |
| #include <array> |
| |
| namespace android { |
| |
| inline static void sanitizeString(char* str) { |
| while (*str) { |
| char c = *str; |
| if (c == '\n' || c == '|') { |
| *str = ' '; |
| } |
| str++; |
| } |
| } |
| |
| template<typename F> |
| inline static void withString(JNIEnv* env, jstring jstr, F callback) { |
| // We need to handle the worst case of 1 character -> 4 bytes |
| // So make a buffer of size 4097 and let it hold a string with a maximum length |
| // of 1024. The extra last byte for the null terminator. |
| std::array<char, 4097> buffer; |
| // We have no idea of knowing how much data GetStringUTFRegion wrote, so null it out in |
| // advance so we can have a reliable null terminator |
| memset(buffer.data(), 0, buffer.size()); |
| jsize size = std::min(env->GetStringLength(jstr), 1024); |
| env->GetStringUTFRegion(jstr, 0, size, buffer.data()); |
| sanitizeString(buffer.data()); |
| |
| callback(buffer.data()); |
| } |
| |
| static jlong android_os_Trace_nativeGetEnabledTags(JNIEnv*, jclass) { |
| return atrace_get_enabled_tags(); |
| } |
| |
| static void android_os_Trace_nativeTraceCounter(JNIEnv* env, jclass, |
| jlong tag, jstring nameStr, jlong value) { |
| withString(env, nameStr, [tag, value](char* str) { |
| atrace_int64(tag, str, value); |
| }); |
| } |
| |
| static void android_os_Trace_nativeTraceBegin(JNIEnv* env, jclass, |
| jlong tag, jstring nameStr) { |
| withString(env, nameStr, [tag](char* str) { |
| atrace_begin(tag, str); |
| }); |
| } |
| |
| static void android_os_Trace_nativeTraceEnd(JNIEnv*, jclass, jlong tag) { |
| atrace_end(tag); |
| } |
| |
| static void android_os_Trace_nativeAsyncTraceBegin(JNIEnv* env, jclass, |
| jlong tag, jstring nameStr, jint cookie) { |
| withString(env, nameStr, [tag, cookie](char* str) { |
| atrace_async_begin(tag, str, cookie); |
| }); |
| } |
| |
| static void android_os_Trace_nativeAsyncTraceEnd(JNIEnv* env, jclass, |
| jlong tag, jstring nameStr, jint cookie) { |
| withString(env, nameStr, [tag, cookie](char* str) { |
| atrace_async_end(tag, str, cookie); |
| }); |
| } |
| |
| static void android_os_Trace_nativeSetAppTracingAllowed(JNIEnv*, jclass, jboolean allowed) { |
| atrace_set_debuggable(allowed); |
| } |
| |
| static void android_os_Trace_nativeSetTracingEnabled(JNIEnv*, jclass, jboolean enabled) { |
| atrace_set_tracing_enabled(enabled); |
| } |
| |
| static const JNINativeMethod gTraceMethods[] = { |
| /* name, signature, funcPtr */ |
| { "nativeGetEnabledTags", |
| "()J", |
| (void*)android_os_Trace_nativeGetEnabledTags }, |
| { "nativeSetAppTracingAllowed", |
| "(Z)V", |
| (void*)android_os_Trace_nativeSetAppTracingAllowed }, |
| { "nativeSetTracingEnabled", |
| "(Z)V", |
| (void*)android_os_Trace_nativeSetTracingEnabled }, |
| |
| // ----------- @FastNative ---------------- |
| |
| { "nativeTraceCounter", |
| "(JLjava/lang/String;J)V", |
| (void*)android_os_Trace_nativeTraceCounter }, |
| { "nativeTraceBegin", |
| "(JLjava/lang/String;)V", |
| (void*)android_os_Trace_nativeTraceBegin }, |
| { "nativeTraceEnd", |
| "(J)V", |
| (void*)android_os_Trace_nativeTraceEnd }, |
| { "nativeAsyncTraceBegin", |
| "(JLjava/lang/String;I)V", |
| (void*)android_os_Trace_nativeAsyncTraceBegin }, |
| { "nativeAsyncTraceEnd", |
| "(JLjava/lang/String;I)V", |
| (void*)android_os_Trace_nativeAsyncTraceEnd }, |
| }; |
| |
| int register_android_os_Trace(JNIEnv* env) { |
| int res = jniRegisterNativeMethods(env, "android/os/Trace", |
| gTraceMethods, NELEM(gTraceMethods)); |
| LOG_ALWAYS_FATAL_IF(res < 0, "Unable to register native methods."); |
| |
| return 0; |
| } |
| |
| } // namespace android |