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 <pthread.h> 18 19 #include <cstdio> 20 #include <iostream> 21 #include <vector> 22 23 #include "android-base/logging.h" 24 #include "jni.h" 25 #include "jvmti.h" 26 #include "scoped_local_ref.h" 27 #include "scoped_primitive_array.h" 28 29 // Test infrastructure 30 #include "jvmti_helper.h" 31 #include "test_env.h" 32 33 namespace art { 34 namespace Test903HelloTagging { 35 36 extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Test903_getTaggedObjects( 37 JNIEnv* env, jclass, jlongArray searchTags, jboolean returnObjects, jboolean returnTags) { 38 ScopedLongArrayRO scoped_array(env); 39 if (searchTags != nullptr) { 40 scoped_array.reset(searchTags); 41 } 42 const jlong* tag_ptr = scoped_array.get(); 43 if (tag_ptr == nullptr) { 44 // Can never pass null. 45 tag_ptr = reinterpret_cast<const jlong*>(1); 46 } 47 48 jint result_count; 49 jobject* result_object_array; 50 jobject** result_object_array_ptr = returnObjects == JNI_TRUE ? &result_object_array : nullptr; 51 jlong* result_tag_array; 52 jlong** result_tag_array_ptr = returnTags == JNI_TRUE ? &result_tag_array : nullptr; 53 54 jvmtiError ret = jvmti_env->GetObjectsWithTags(scoped_array.size(), 55 tag_ptr, 56 &result_count, 57 result_object_array_ptr, 58 result_tag_array_ptr); 59 if (JvmtiErrorToException(env, jvmti_env, ret)) { 60 return nullptr; 61 } 62 63 CHECK_GE(result_count, 0); 64 65 ScopedLocalRef<jclass> obj_class(env, env->FindClass("java/lang/Object")); 66 if (obj_class.get() == nullptr) { 67 return nullptr; 68 } 69 70 jobjectArray resultObjectArray = nullptr; 71 if (returnObjects == JNI_TRUE) { 72 resultObjectArray = env->NewObjectArray(result_count, obj_class.get(), nullptr); 73 if (resultObjectArray == nullptr) { 74 return nullptr; 75 } 76 for (jint i = 0; i < result_count; ++i) { 77 env->SetObjectArrayElement(resultObjectArray, i, result_object_array[i]); 78 } 79 } 80 81 jlongArray resultTagArray = nullptr; 82 if (returnTags == JNI_TRUE) { 83 resultTagArray = env->NewLongArray(result_count); 84 env->SetLongArrayRegion(resultTagArray, 0, result_count, result_tag_array); 85 } 86 87 jobject count_integer; 88 { 89 ScopedLocalRef<jclass> integer_class(env, env->FindClass("java/lang/Integer")); 90 jmethodID methodID = env->GetMethodID(integer_class.get(), "<init>", "(I)V"); 91 count_integer = env->NewObject(integer_class.get(), methodID, result_count); 92 if (count_integer == nullptr) { 93 return nullptr; 94 } 95 } 96 97 jobjectArray resultArray = env->NewObjectArray(3, obj_class.get(), nullptr); 98 if (resultArray == nullptr) { 99 return nullptr; 100 } 101 env->SetObjectArrayElement(resultArray, 0, resultObjectArray); 102 env->SetObjectArrayElement(resultArray, 1, resultTagArray); 103 env->SetObjectArrayElement(resultArray, 2, count_integer); 104 105 return resultArray; 106 } 107 108 static jvmtiEnv* CreateJvmtiEnv(JNIEnv* env) { 109 JavaVM* jvm; 110 CHECK_EQ(0, env->GetJavaVM(&jvm)); 111 112 jvmtiEnv* new_jvmti_env; 113 CHECK_EQ(0, jvm->GetEnv(reinterpret_cast<void**>(&new_jvmti_env), JVMTI_VERSION_1_0)); 114 115 jvmtiCapabilities capa; 116 memset(&capa, 0, sizeof(jvmtiCapabilities)); 117 capa.can_tag_objects = 1; 118 jvmtiError error = new_jvmti_env->AddCapabilities(&capa); 119 CHECK_EQ(JVMTI_ERROR_NONE, error); 120 121 return new_jvmti_env; 122 } 123 124 static void SetTag(jvmtiEnv* env, jobject obj, jlong tag) { 125 jvmtiError ret = env->SetTag(obj, tag); 126 CHECK_EQ(JVMTI_ERROR_NONE, ret); 127 } 128 129 static jlong GetTag(jvmtiEnv* env, jobject obj) { 130 jlong tag; 131 jvmtiError ret = env->GetTag(obj, &tag); 132 CHECK_EQ(JVMTI_ERROR_NONE, ret); 133 return tag; 134 } 135 136 extern "C" JNIEXPORT jlongArray JNICALL Java_art_Test903_testTagsInDifferentEnvs( 137 JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jobject obj, jlong base_tag, jint count) { 138 std::unique_ptr<jvmtiEnv*[]> envs = std::unique_ptr<jvmtiEnv*[]>(new jvmtiEnv*[count]); 139 envs[0] = jvmti_env; 140 for (int32_t i = 1; i != count; ++i) { 141 envs[i] = CreateJvmtiEnv(env); 142 } 143 144 for (int32_t i = 0; i != count; ++i) { 145 SetTag(envs[i], obj, base_tag + i); 146 } 147 std::unique_ptr<jlong[]> vals = std::unique_ptr<jlong[]>(new jlong[count]); 148 for (int32_t i = 0; i != count; ++i) { 149 vals[i] = GetTag(envs[i], obj); 150 } 151 152 for (int32_t i = 1; i != count; ++i) { 153 CHECK_EQ(JVMTI_ERROR_NONE, envs[i]->DisposeEnvironment()); 154 } 155 156 jlongArray res = env->NewLongArray(count); 157 if (res == nullptr) { 158 return nullptr; 159 } 160 env->SetLongArrayRegion(res, 0, count, vals.get()); 161 return res; 162 } 163 164 } // namespace Test903HelloTagging 165 } // namespace art 166
