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/*
* Copyright (C) 2016 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 "common_helper.h"
#include <sstream>
#include <string>
#include "android-base/stringprintf.h"
#include "jni.h"
#include "jvmti.h"
#include "jvmti_helper.h"
#include "ti_macros.h"
namespace art {
jobject GetJavaField(jvmtiEnv* jvmti, JNIEnv* env, jclass field_klass, jfieldID f) {
jint mods = 0;
if (JvmtiErrorToException(env, jvmti, jvmti->GetFieldModifiers(field_klass, f, &mods))) {
return nullptr;
}
bool is_static = (mods & kAccStatic) != 0;
return env->ToReflectedField(field_klass, f, is_static);
}
jobject GetJavaMethod(jvmtiEnv* jvmti, JNIEnv* env, jmethodID m) {
jint mods = 0;
if (JvmtiErrorToException(env, jvmti, jvmti->GetMethodModifiers(m, &mods))) {
return nullptr;
}
bool is_static = (mods & kAccStatic) != 0;
jclass method_klass = nullptr;
if (JvmtiErrorToException(env, jvmti, jvmti->GetMethodDeclaringClass(m, &method_klass))) {
return nullptr;
}
jobject res = env->ToReflectedMethod(method_klass, m, is_static);
env->DeleteLocalRef(method_klass);
return res;
}
jobject GetJavaValueByType(JNIEnv* env, char type, jvalue value) {
std::string name;
switch (type) {
case 'V':
return nullptr;
case '[':
case 'L':
return value.l;
case 'Z':
name = "java/lang/Boolean";
break;
case 'B':
name = "java/lang/Byte";
break;
case 'C':
name = "java/lang/Character";
break;
case 'S':
name = "java/lang/Short";
break;
case 'I':
name = "java/lang/Integer";
break;
case 'J':
name = "java/lang/Long";
break;
case 'F':
name = "java/lang/Float";
break;
case 'D':
name = "java/lang/Double";
break;
default:
LOG(FATAL) << "Unable to figure out type!";
UNREACHABLE();
}
std::ostringstream oss;
oss << "(" << type << ")L" << name << ";";
std::string args = oss.str();
jclass target = env->FindClass(name.c_str());
jmethodID valueOfMethod = env->GetStaticMethodID(target, "valueOf", args.c_str());
CHECK(valueOfMethod != nullptr) << args;
jobject res = env->CallStaticObjectMethodA(target, valueOfMethod, &value);
env->DeleteLocalRef(target);
return res;
}
jobject GetJavaValue(jvmtiEnv* jvmtienv, JNIEnv* env, jmethodID m, jvalue value) {
char *fname, *fsig, *fgen;
if (JvmtiErrorToException(env, jvmtienv, jvmtienv->GetMethodName(m, &fname, &fsig, &fgen))) {
return nullptr;
}
std::string type(fsig);
type = type.substr(type.find(')') + 1);
jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(fsig));
jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(fname));
jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(fgen));
return GetJavaValueByType(env, type[0], value);
}
} // namespace art
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