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/*
* 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
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