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