1 /*
2 * Copyright (C) 2019 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 <atomic>
18
19 #include "jvmti.h"
20
21 // Test infrastructure
22 #include "jvmti_helper.h"
23 #include "scoped_local_ref.h"
24 #include "test_env.h"
25
26 namespace art {
27 namespace Test1964AddToDexClassLoader {
28
29 using AddToDexClassLoader = jvmtiError (*)(jvmtiEnv* env,
30 jobject loader,
31 const char* segment);
32
Dealloc(T * t)33 template <typename T> static void Dealloc(T* t) {
34 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(t));
35 }
36
Dealloc(T * t,Rest...rs)37 template <typename T, typename... Rest> static void Dealloc(T* t, Rest... rs) {
38 Dealloc(t);
39 Dealloc(rs...);
40 }
DeallocParams(jvmtiParamInfo * params,jint n_params)41 static void DeallocParams(jvmtiParamInfo* params, jint n_params) {
42 for (jint i = 0; i < n_params; i++) {
43 Dealloc(params[i].name);
44 }
45 }
46
GetAddFunction(JNIEnv * env)47 AddToDexClassLoader GetAddFunction(JNIEnv* env) {
48 // Get the extensions.
49 jint n_ext = 0;
50 jvmtiExtensionFunctionInfo* infos = nullptr;
51 if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetExtensionFunctions(&n_ext, &infos))) {
52 return nullptr;
53 }
54 AddToDexClassLoader result = nullptr;
55 for (jint i = 0; i < n_ext; i++) {
56 jvmtiExtensionFunctionInfo* cur_info = &infos[i];
57 if (strcmp("com.android.art.classloader.add_to_dex_class_loader", cur_info->id) ==
58 0) {
59 result = reinterpret_cast<AddToDexClassLoader>(cur_info->func);
60 }
61 // Cleanup the cur_info
62 DeallocParams(cur_info->params, cur_info->param_count);
63 Dealloc(cur_info->id, cur_info->short_description, cur_info->params, cur_info->errors);
64 }
65 // Cleanup the array.
66 Dealloc(infos);
67 return result;
68 }
69
Java_Main_addToClassLoaderNative(JNIEnv * env,jclass,jobject loader,jstring segment)70 extern "C" JNIEXPORT void JNICALL Java_Main_addToClassLoaderNative(JNIEnv* env,
71 jclass,
72 jobject loader,
73 jstring segment) {
74 AddToDexClassLoader add_func = GetAddFunction(env);
75 if (add_func == nullptr) {
76 env->ThrowNew(env->FindClass("java/lang/RuntimeError"), "Failed to find extension function");
77 return;
78 }
79 const char* chars = env->GetStringUTFChars(segment, nullptr);
80 JvmtiErrorToException(
81 env,
82 jvmti_env,
83 add_func(jvmti_env,
84 loader,
85 chars));
86 env->ReleaseStringUTFChars(segment, chars);
87 }
88
89 } // namespace Test1964AddToDexClassLoader
90 } // namespace art
91