/*
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* Copyright (C) 2013 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 <stdio.h>
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#include "jni.h"
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#include "jvmti.h"
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#include "android-base/logging.h"
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#include "android-base/macros.h"
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// Test infrastructure
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#include "jvmti_helper.h"
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#include "test_env.h"
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namespace art {
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namespace Test927JNITable {
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// This test is equivalent to the jni_internal_test JNIEnvExtTableOverride.
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static size_t gGlobalRefCount = 0;
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static JNINativeInterface* gOriginalEnv = nullptr;
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static jobject CountNewGlobalRef(JNIEnv* env, jobject o) {
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++gGlobalRefCount;
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return gOriginalEnv->NewGlobalRef(env, o);
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}
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extern "C" JNIEXPORT void JNICALL Java_art_Test928_doJNITableTest(
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JNIEnv* env, jclass klass) {
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// Get the current table, as the delegate.
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jvmtiError getorig_result = jvmti_env->GetJNIFunctionTable(&gOriginalEnv);
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if (JvmtiErrorToException(env, jvmti_env, getorig_result)) {
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return;
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}
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// Get the current table, as the override we'll install.
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JNINativeInterface* env_override;
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jvmtiError getoverride_result = jvmti_env->GetJNIFunctionTable(&env_override);
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if (JvmtiErrorToException(env, jvmti_env, getoverride_result)) {
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return;
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}
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env_override->NewGlobalRef = CountNewGlobalRef;
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gGlobalRefCount = 0;
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// Install the override.
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jvmtiError setoverride_result = jvmti_env->SetJNIFunctionTable(env_override);
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if (JvmtiErrorToException(env, jvmti_env, setoverride_result)) {
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return;
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}
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jobject global = env->NewGlobalRef(klass);
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CHECK_EQ(1u, gGlobalRefCount);
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env->DeleteGlobalRef(global);
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// Install the "original." There is no real reset.
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jvmtiError setoverride2_result = jvmti_env->SetJNIFunctionTable(gOriginalEnv);
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if (JvmtiErrorToException(env, jvmti_env, setoverride2_result)) {
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return;
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}
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jobject global2 = env->NewGlobalRef(klass);
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CHECK_EQ(1u, gGlobalRefCount);
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env->DeleteGlobalRef(global2);
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// Try to install null. Should return NULL_POINTER error.
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jvmtiError setoverride3_result = jvmti_env->SetJNIFunctionTable(nullptr);
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if (setoverride3_result != JVMTI_ERROR_NULL_POINTER) {
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LOG(FATAL) << "Didn't receive NULL_POINTER";
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}
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jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(env_override));
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}
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} // namespace Test927JNITable
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} // namespace art
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