1 /*
2  * Copyright (C) 2015 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 <dlfcn.h>
18 
19 #include "code_simulator_container.h"
20 
21 #include "base/globals.h"
22 #include "base/logging.h"  // For VLOG.
23 #include "code_simulator.h"
24 
25 namespace art {
26 
CodeSimulatorContainer(InstructionSet target_isa)27 CodeSimulatorContainer::CodeSimulatorContainer(InstructionSet target_isa)
28     : libart_simulator_handle_(nullptr),
29       simulator_(nullptr) {
30   const char* libart_simulator_so_name =
31       kIsDebugBuild ? "libartd-simulator.so" : "libart-simulator.so";
32   libart_simulator_handle_ = dlopen(libart_simulator_so_name, RTLD_NOW);
33   // It is not a real error when libart-simulator does not exist, e.g., on target.
34   if (libart_simulator_handle_ == nullptr) {
35     VLOG(simulator) << "Could not load " << libart_simulator_so_name << ": " << dlerror();
36   } else {
37     using CreateCodeSimulatorPtr = CodeSimulator*(*)(InstructionSet);
38     CreateCodeSimulatorPtr create_code_simulator =
39         reinterpret_cast<CreateCodeSimulatorPtr>(
40             dlsym(libart_simulator_handle_, "CreateCodeSimulator"));
41     DCHECK(create_code_simulator != nullptr) << "Fail to find symbol of CreateCodeSimulator: "
42         << dlerror();
43     simulator_ = create_code_simulator(target_isa);
44   }
45 }
46 
~CodeSimulatorContainer()47 CodeSimulatorContainer::~CodeSimulatorContainer() {
48   // Free simulator object before closing libart-simulator because destructor of
49   // CodeSimulator lives in it.
50   if (simulator_ != nullptr) {
51     delete simulator_;
52   }
53   if (libart_simulator_handle_ != nullptr) {
54     dlclose(libart_simulator_handle_);
55   }
56 }
57 
58 }  // namespace art
59