122 lines
3.8 KiB
C++
122 lines
3.8 KiB
C++
/*
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* Copyright (C) 2020 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 <queue>
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#include <vector>
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#include "jvmti.h"
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// Test infrastructure
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#include "jvmti_helper.h"
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#include "nativehelper/scoped_local_ref.h"
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#include "nativehelper/scoped_primitive_array.h"
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#include "test_env.h"
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namespace art {
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namespace Test2038HiddenApiExt {
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template <typename T>
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static void Dealloc(T* t) {
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jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(t));
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}
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template <typename T, typename... Rest>
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static void Dealloc(T* t, Rest... rs) {
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Dealloc(t);
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Dealloc(rs...);
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}
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static void DeallocParams(jvmtiParamInfo* params, jint n_params) {
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for (jint i = 0; i < n_params; i++) {
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Dealloc(params[i].name);
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}
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}
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static constexpr std::string_view kDisablePolicyName =
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"com.android.art.misc.disable_hidden_api_enforcement_policy";
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static constexpr std::string_view kGetPolicyName =
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"com.android.art.misc.get_hidden_api_enforcement_policy";
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static constexpr std::string_view kSetPolicyName =
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"com.android.art.misc.set_hidden_api_enforcement_policy";
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using GetPolicy = jvmtiError (*)(jvmtiEnv*, jint*);
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using SetPolicy = jvmtiError (*)(jvmtiEnv*, jint);
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using DisablePolicy = jvmtiError (*)(jvmtiEnv*);
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void* GetExtension(JNIEnv* env, const std::string_view& name) {
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// Get the extensions.
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jint n_ext = 0;
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void* result = nullptr;
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jvmtiExtensionFunctionInfo* infos = nullptr;
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if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetExtensionFunctions(&n_ext, &infos))) {
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return nullptr;
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}
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for (jint i = 0; i < n_ext; i++) {
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jvmtiExtensionFunctionInfo* cur_info = &infos[i];
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if (name == std::string_view(cur_info->id)) {
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result = reinterpret_cast<void*>(cur_info->func);
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}
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// Cleanup the cur_info
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DeallocParams(cur_info->params, cur_info->param_count);
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Dealloc(cur_info->id, cur_info->short_description, cur_info->params, cur_info->errors);
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}
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// Cleanup the array.
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Dealloc(infos);
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if (result == nullptr) {
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ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
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env->ThrowNew(rt_exception.get(), "Unable to find policy extensions.");
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return nullptr;
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}
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return result;
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}
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extern "C" JNIEXPORT jint JNICALL Java_Main_disablePolicy(JNIEnv* env, jclass) {
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jint res;
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GetPolicy get_policy = reinterpret_cast<GetPolicy>(GetExtension(env, kGetPolicyName));
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if (get_policy == nullptr) {
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return -1;
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}
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DisablePolicy disable_policy =
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reinterpret_cast<DisablePolicy>(GetExtension(env, kDisablePolicyName));
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if (disable_policy == nullptr) {
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return -1;
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}
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if (JvmtiErrorToException(env, jvmti_env, get_policy(jvmti_env, &res))) {
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return -1;
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}
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JvmtiErrorToException(env, jvmti_env, disable_policy(jvmti_env));
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return res;
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}
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extern "C" JNIEXPORT jint JNICALL Java_Main_setPolicy(JNIEnv* env, jclass, jint pol) {
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jint res;
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GetPolicy get_policy = reinterpret_cast<GetPolicy>(GetExtension(env, kGetPolicyName));
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if (get_policy == nullptr) {
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return -1;
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}
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SetPolicy set_policy = reinterpret_cast<SetPolicy>(GetExtension(env, kSetPolicyName));
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if (set_policy == nullptr) {
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return -1;
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}
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if (JvmtiErrorToException(env, jvmti_env, get_policy(jvmti_env, &res))) {
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return -1;
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}
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JvmtiErrorToException(env, jvmti_env, set_policy(jvmti_env, pol));
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return res;
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}
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} // namespace Test2038HiddenApiExt
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} // namespace art
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