Alex Light | c758875 | 2018-02-20 11:15:54 -0800 | [diff] [blame] | 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 "jvmti.h" |
| 18 | |
| 19 | // Test infrastructure |
| 20 | #include "jvmti_helper.h" |
| 21 | #include "scoped_local_ref.h" |
| 22 | #include "test_env.h" |
| 23 | |
| 24 | namespace art { |
| 25 | namespace Test1946Descriptors { |
| 26 | |
| 27 | typedef jvmtiError (*GetDescriptorList)(jvmtiEnv* env, jobject loader, jint* cnt, char*** descs); |
| 28 | |
| 29 | struct DescriptorData { |
| 30 | GetDescriptorList get_descriptor_list; |
| 31 | }; |
| 32 | |
| 33 | template <typename T> |
| 34 | static void Dealloc(T* t) { |
| 35 | jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(t)); |
| 36 | } |
| 37 | |
| 38 | template <typename T, typename ...Rest> |
| 39 | static void Dealloc(T* t, Rest... rs) { |
| 40 | Dealloc(t); |
| 41 | Dealloc(rs...); |
| 42 | } |
| 43 | |
| 44 | static void Cleanup(char** data, jint cnt) { |
| 45 | for (jint i = 0; i < cnt; i++) { |
| 46 | Dealloc(data[i]); |
| 47 | } |
| 48 | Dealloc(data); |
| 49 | } |
| 50 | |
| 51 | extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Test1946_getClassloaderDescriptors( |
| 52 | JNIEnv* env, jclass, jobject loader) { |
| 53 | DescriptorData* data = nullptr; |
| 54 | if (JvmtiErrorToException( |
| 55 | env, jvmti_env, jvmti_env->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) { |
| 56 | return nullptr; |
| 57 | } |
| 58 | if (data == nullptr || data->get_descriptor_list == nullptr) { |
| 59 | ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException")); |
| 60 | env->ThrowNew(rt_exception.get(), "Alloc tracking data not initialized."); |
| 61 | return nullptr; |
| 62 | } |
| 63 | char** classes = nullptr; |
| 64 | jint cnt = -1; |
| 65 | if (JvmtiErrorToException(env, jvmti_env, data->get_descriptor_list(jvmti_env, |
| 66 | loader, |
| 67 | &cnt, |
| 68 | &classes))) { |
| 69 | return nullptr; |
| 70 | } |
| 71 | ScopedLocalRef<jobjectArray> arr(env, env->NewObjectArray(cnt, |
| 72 | env->FindClass("java/lang/String"), |
| 73 | nullptr)); |
| 74 | if (env->ExceptionCheck()) { |
| 75 | Cleanup(classes, cnt); |
| 76 | return nullptr; |
| 77 | } |
| 78 | |
| 79 | for (jint i = 0; i < cnt; i++) { |
| 80 | env->SetObjectArrayElement(arr.get(), i, env->NewStringUTF(classes[i])); |
| 81 | if (env->ExceptionCheck()) { |
| 82 | Cleanup(classes, cnt); |
| 83 | return nullptr; |
| 84 | } |
| 85 | } |
| 86 | Cleanup(classes, cnt); |
| 87 | return arr.release(); |
| 88 | } |
| 89 | |
| 90 | static void DeallocParams(jvmtiParamInfo* params, jint n_params) { |
| 91 | for (jint i = 0; i < n_params; i++) { |
| 92 | Dealloc(params[i].name); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | extern "C" JNIEXPORT void JNICALL Java_art_Test1946_initializeTest(JNIEnv* env, jclass) { |
| 97 | void* old_data = nullptr; |
| 98 | if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetEnvironmentLocalStorage(&old_data))) { |
| 99 | return; |
| 100 | } else if (old_data != nullptr) { |
| 101 | ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException")); |
| 102 | env->ThrowNew(rt_exception.get(), "Environment already has local storage set!"); |
| 103 | return; |
| 104 | } |
| 105 | DescriptorData* data = nullptr; |
| 106 | if (JvmtiErrorToException(env, |
| 107 | jvmti_env, |
| 108 | jvmti_env->Allocate(sizeof(DescriptorData), |
| 109 | reinterpret_cast<unsigned char**>(&data)))) { |
| 110 | return; |
| 111 | } |
| 112 | memset(data, 0, sizeof(DescriptorData)); |
| 113 | // Get the extensions. |
| 114 | jint n_ext = 0; |
| 115 | jvmtiExtensionFunctionInfo* infos = nullptr; |
| 116 | if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetExtensionFunctions(&n_ext, &infos))) { |
| 117 | return; |
| 118 | } |
| 119 | for (jint i = 0; i < n_ext; i++) { |
| 120 | jvmtiExtensionFunctionInfo* cur_info = &infos[i]; |
| 121 | if (strcmp("com.android.art.class.get_class_loader_class_descriptors", cur_info->id) == 0) { |
| 122 | data->get_descriptor_list = reinterpret_cast<GetDescriptorList>(cur_info->func); |
| 123 | } |
| 124 | // Cleanup the cur_info |
| 125 | DeallocParams(cur_info->params, cur_info->param_count); |
| 126 | Dealloc(cur_info->id, cur_info->short_description, cur_info->params, cur_info->errors); |
| 127 | } |
| 128 | // Cleanup the array. |
| 129 | Dealloc(infos); |
| 130 | if (data->get_descriptor_list == nullptr) { |
| 131 | ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException")); |
| 132 | env->ThrowNew(rt_exception.get(), "Unable to find memory tracking extensions."); |
| 133 | return; |
| 134 | } |
| 135 | JvmtiErrorToException(env, jvmti_env, jvmti_env->SetEnvironmentLocalStorage(data)); |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | } // namespace Test1946Descriptors |
| 140 | } // namespace art |