1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdio.h> 18 19 #include "jni.h" 20 #include "jvmti.h" 21 22 #include "android-base/logging.h" 23 #include "android-base/macros.h" 24 25 // Test infrastructure 26 #include "jvmti_helper.h" 27 #include "test_env.h" 28 29 namespace art { 30 namespace Test927JNITable { 31 32 // This test is equivalent to the jni_internal_test JNIEnvExtTableOverride. 33 34 static size_t gGlobalRefCount = 0; 35 static JNINativeInterface* gOriginalEnv = nullptr; 36 37 static jobject CountNewGlobalRef(JNIEnv* env, jobject o) { 38 ++gGlobalRefCount; 39 return gOriginalEnv->NewGlobalRef(env, o); 40 } 41 42 extern "C" JNIEXPORT void JNICALL Java_art_Test928_doJNITableTest( 43 JNIEnv* env, jclass klass) { 44 // Get the current table, as the delegate. 45 jvmtiError getorig_result = jvmti_env->GetJNIFunctionTable(&gOriginalEnv); 46 if (JvmtiErrorToException(env, jvmti_env, getorig_result)) { 47 return; 48 } 49 50 // Get the current table, as the override we'll install. 51 JNINativeInterface* env_override; 52 jvmtiError getoverride_result = jvmti_env->GetJNIFunctionTable(&env_override); 53 if (JvmtiErrorToException(env, jvmti_env, getoverride_result)) { 54 return; 55 } 56 57 env_override->NewGlobalRef = CountNewGlobalRef; 58 gGlobalRefCount = 0; 59 60 // Install the override. 61 jvmtiError setoverride_result = jvmti_env->SetJNIFunctionTable(env_override); 62 if (JvmtiErrorToException(env, jvmti_env, setoverride_result)) { 63 return; 64 } 65 66 jobject global = env->NewGlobalRef(klass); 67 CHECK_EQ(1u, gGlobalRefCount); 68 env->DeleteGlobalRef(global); 69 70 // Install the "original." There is no real reset. 71 jvmtiError setoverride2_result = jvmti_env->SetJNIFunctionTable(gOriginalEnv); 72 if (JvmtiErrorToException(env, jvmti_env, setoverride2_result)) { 73 return; 74 } 75 76 jobject global2 = env->NewGlobalRef(klass); 77 CHECK_EQ(1u, gGlobalRefCount); 78 env->DeleteGlobalRef(global2); 79 80 // Try to install null. Should return NULL_POINTER error. 81 jvmtiError setoverride3_result = jvmti_env->SetJNIFunctionTable(nullptr); 82 if (setoverride3_result != JVMTI_ERROR_NULL_POINTER) { 83 LOG(FATAL) << "Didn't receive NULL_POINTER"; 84 } 85 86 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(env_override)); 87 } 88 89 } // namespace Test927JNITable 90 } // namespace art 91
