1 /*
2  * Copyright (C) 2014 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 // A dummy implementation of the native-bridge interface.
18 
19 #include "nativebridge/native_bridge.h"
20 
21 #include <signal.h>
22 
23 // NativeBridgeCallbacks implementations
native_bridge2_initialize(const android::NativeBridgeRuntimeCallbacks *,const char *,const char *)24 extern "C" bool native_bridge2_initialize(const android::NativeBridgeRuntimeCallbacks* /* art_cbs */,
25                                          const char* /* app_code_cache_dir */,
26                                          const char* /* isa */) {
27   return true;
28 }
29 
native_bridge2_loadLibrary(const char *,int)30 extern "C" void* native_bridge2_loadLibrary(const char* /* libpath */, int /* flag */) {
31   return nullptr;
32 }
33 
native_bridge2_getTrampoline(void *,const char *,const char *,uint32_t)34 extern "C" void* native_bridge2_getTrampoline(void* /* handle */, const char* /* name */,
35                                              const char* /* shorty */, uint32_t /* len */) {
36   return nullptr;
37 }
38 
native_bridge2_isSupported(const char *)39 extern "C" bool native_bridge2_isSupported(const char* /* libpath */) {
40   return false;
41 }
42 
native_bridge2_getAppEnv(const char *)43 extern "C" const struct android::NativeBridgeRuntimeValues* native_bridge2_getAppEnv(
44     const char* /* abi */) {
45   return nullptr;
46 }
47 
native_bridge2_is_compatible_compatible_with(uint32_t version)48 extern "C" bool native_bridge2_is_compatible_compatible_with(uint32_t version) {
49   // For testing, allow 1 and 2, but disallow 3+.
50   return version <= 2;
51 }
52 
native_bridge2_dummy_signal_handler(int,siginfo_t *,void *)53 static bool native_bridge2_dummy_signal_handler(int, siginfo_t*, void*) {
54   // TODO: Implement something here. We'd either have to have a death test with a log here, or
55   //       we'd have to be able to resume after the faulting instruction...
56   return true;
57 }
58 
native_bridge2_get_signal_handler(int signal)59 extern "C" android::NativeBridgeSignalHandlerFn native_bridge2_get_signal_handler(int signal) {
60   if (signal == SIGSEGV) {
61     return &native_bridge2_dummy_signal_handler;
62   }
63   return nullptr;
64 }
65 
66 android::NativeBridgeCallbacks NativeBridgeItf {
67   .version = 2,
68   .initialize = &native_bridge2_initialize,
69   .loadLibrary = &native_bridge2_loadLibrary,
70   .getTrampoline = &native_bridge2_getTrampoline,
71   .isSupported = &native_bridge2_isSupported,
72   .getAppEnv = &native_bridge2_getAppEnv,
73   .isCompatibleWith = &native_bridge2_is_compatible_compatible_with,
74   .getSignalHandler = &native_bridge2_get_signal_handler
75 };
76 
77