1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "adapter/ohos/entrance/pa_engine/engine/common/js_backend_engine_loader.h"
17
18 #include <dlfcn.h>
19
20 #include "base/log/log.h"
21 #include "base/utils/singleton.h"
22 #include "base/utils/system_properties.h"
23 #include "base/utils/utils.h"
24 #include "core/common/ace_application_info.h"
25
26 namespace OHOS::Ace {
27 namespace {
28
29 constexpr char BACKEND_ENGINE_ENTRY[] = "OHOS_ACE_GetJsBackendEngineLoader";
30
31 using DynamicEntry = void* (*)();
32 class DummyJsBackendEngineLoader final : public JsBackendEngineLoader, public Singleton<DummyJsBackendEngineLoader> {
33 DECLARE_SINGLETON(DummyJsBackendEngineLoader);
34
35 public:
CreateJsBackendEngine(int32_t instanceId) const36 RefPtr<JsBackendEngine> CreateJsBackendEngine(int32_t instanceId) const override
37 {
38 return nullptr;
39 }
40 };
41
42 DummyJsBackendEngineLoader::DummyJsBackendEngineLoader() = default;
43 DummyJsBackendEngineLoader::~DummyJsBackendEngineLoader() = default;
44
GetJsBackendEngineLoader(const char * sharedLibrary)45 JsBackendEngineLoader& GetJsBackendEngineLoader(const char* sharedLibrary)
46 {
47 CHECK_NULL_RETURN(sharedLibrary, DummyJsBackendEngineLoader::GetInstance());
48 void* handle = dlopen(sharedLibrary, RTLD_LAZY);
49 if (handle == nullptr) {
50 LOGE("Failed to open shared library %{public}s, reason: %{public}sn", sharedLibrary, dlerror());
51 return DummyJsBackendEngineLoader::GetInstance();
52 }
53
54 auto entry = reinterpret_cast<DynamicEntry>(dlsym(handle, BACKEND_ENGINE_ENTRY));
55 if (entry == nullptr) {
56 dlclose(handle);
57 LOGE("Failed to get symbol %{public}s in %{public}s", BACKEND_ENGINE_ENTRY, sharedLibrary);
58 return DummyJsBackendEngineLoader::GetInstance();
59 }
60
61 auto loader = reinterpret_cast<JsBackendEngineLoader*>(entry());
62 if (loader == nullptr) {
63 dlclose(handle);
64 LOGE("Failed to get js engine loader in %{public}s", sharedLibrary);
65 return DummyJsBackendEngineLoader::GetInstance();
66 }
67
68 return *loader;
69 }
70
71 } // namespace
72
Get(const char * sharedLibrary)73 JsBackendEngineLoader& JsBackendEngineLoader::Get(const char* sharedLibrary)
74 {
75 static JsBackendEngineLoader& instance = GetJsBackendEngineLoader(sharedLibrary);
76 return instance;
77 }
78
79 } // namespace OHOS::Ace
80