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      1 /*
      2  * Copyright (C) 2017 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 "runtime_callbacks.h"
     18 
     19 #include <algorithm>
     20 
     21 #include "art_method.h"
     22 #include "base/macros.h"
     23 #include "class_linker.h"
     24 #include "thread.h"
     25 
     26 namespace art {
     27 
     28 void RuntimeCallbacks::AddThreadLifecycleCallback(ThreadLifecycleCallback* cb) {
     29   thread_callbacks_.push_back(cb);
     30 }
     31 
     32 template <typename T>
     33 ALWAYS_INLINE
     34 static inline void Remove(T* cb, std::vector<T*>* data) {
     35   auto it = std::find(data->begin(), data->end(), cb);
     36   if (it != data->end()) {
     37     data->erase(it);
     38   }
     39 }
     40 
     41 void RuntimeCallbacks::RemoveThreadLifecycleCallback(ThreadLifecycleCallback* cb) {
     42   Remove(cb, &thread_callbacks_);
     43 }
     44 
     45 void RuntimeCallbacks::ThreadStart(Thread* self) {
     46   for (ThreadLifecycleCallback* cb : thread_callbacks_) {
     47     cb->ThreadStart(self);
     48   }
     49 }
     50 
     51 void RuntimeCallbacks::ThreadDeath(Thread* self) {
     52   for (ThreadLifecycleCallback* cb : thread_callbacks_) {
     53     cb->ThreadDeath(self);
     54   }
     55 }
     56 
     57 void RuntimeCallbacks::AddClassLoadCallback(ClassLoadCallback* cb) {
     58   class_callbacks_.push_back(cb);
     59 }
     60 
     61 void RuntimeCallbacks::RemoveClassLoadCallback(ClassLoadCallback* cb) {
     62   Remove(cb, &class_callbacks_);
     63 }
     64 
     65 void RuntimeCallbacks::ClassLoad(Handle<mirror::Class> klass) {
     66   for (ClassLoadCallback* cb : class_callbacks_) {
     67     cb->ClassLoad(klass);
     68   }
     69 }
     70 
     71 void RuntimeCallbacks::ClassPreDefine(const char* descriptor,
     72                                       Handle<mirror::Class> temp_class,
     73                                       Handle<mirror::ClassLoader> loader,
     74                                       const DexFile& initial_dex_file,
     75                                       const DexFile::ClassDef& initial_class_def,
     76                                       /*out*/DexFile const** final_dex_file,
     77                                       /*out*/DexFile::ClassDef const** final_class_def) {
     78   DexFile const* current_dex_file = &initial_dex_file;
     79   DexFile::ClassDef const* current_class_def = &initial_class_def;
     80   for (ClassLoadCallback* cb : class_callbacks_) {
     81     DexFile const* new_dex_file = nullptr;
     82     DexFile::ClassDef const* new_class_def = nullptr;
     83     cb->ClassPreDefine(descriptor,
     84                        temp_class,
     85                        loader,
     86                        *current_dex_file,
     87                        *current_class_def,
     88                        &new_dex_file,
     89                        &new_class_def);
     90     if ((new_dex_file != nullptr && new_dex_file != current_dex_file) ||
     91         (new_class_def != nullptr && new_class_def != current_class_def)) {
     92       DCHECK(new_dex_file != nullptr && new_class_def != nullptr);
     93       current_dex_file = new_dex_file;
     94       current_class_def = new_class_def;
     95     }
     96   }
     97   *final_dex_file = current_dex_file;
     98   *final_class_def = current_class_def;
     99 }
    100 
    101 void RuntimeCallbacks::ClassPrepare(Handle<mirror::Class> temp_klass, Handle<mirror::Class> klass) {
    102   for (ClassLoadCallback* cb : class_callbacks_) {
    103     cb->ClassPrepare(temp_klass, klass);
    104   }
    105 }
    106 
    107 void RuntimeCallbacks::AddRuntimeSigQuitCallback(RuntimeSigQuitCallback* cb) {
    108   sigquit_callbacks_.push_back(cb);
    109 }
    110 
    111 void RuntimeCallbacks::RemoveRuntimeSigQuitCallback(RuntimeSigQuitCallback* cb) {
    112   Remove(cb, &sigquit_callbacks_);
    113 }
    114 
    115 void RuntimeCallbacks::SigQuit() {
    116   for (RuntimeSigQuitCallback* cb : sigquit_callbacks_) {
    117     cb->SigQuit();
    118   }
    119 }
    120 
    121 void RuntimeCallbacks::AddRuntimePhaseCallback(RuntimePhaseCallback* cb) {
    122   phase_callbacks_.push_back(cb);
    123 }
    124 
    125 void RuntimeCallbacks::RemoveRuntimePhaseCallback(RuntimePhaseCallback* cb) {
    126   Remove(cb, &phase_callbacks_);
    127 }
    128 
    129 void RuntimeCallbacks::NextRuntimePhase(RuntimePhaseCallback::RuntimePhase phase) {
    130   for (RuntimePhaseCallback* cb : phase_callbacks_) {
    131     cb->NextRuntimePhase(phase);
    132   }
    133 }
    134 
    135 void RuntimeCallbacks::AddMethodCallback(MethodCallback* cb) {
    136   method_callbacks_.push_back(cb);
    137 }
    138 
    139 void RuntimeCallbacks::RemoveMethodCallback(MethodCallback* cb) {
    140   Remove(cb, &method_callbacks_);
    141 }
    142 
    143 void RuntimeCallbacks::RegisterNativeMethod(ArtMethod* method,
    144                                             const void* in_cur_method,
    145                                             /*out*/void** new_method) {
    146   void* cur_method = const_cast<void*>(in_cur_method);
    147   *new_method = cur_method;
    148   for (MethodCallback* cb : method_callbacks_) {
    149     cb->RegisterNativeMethod(method, cur_method, new_method);
    150     if (*new_method != nullptr) {
    151       cur_method = *new_method;
    152     }
    153   }
    154 }
    155 
    156 }  // namespace art
    157