1 /*
2 * Copyright (C) 2016 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_bridge3_initialize(const android::NativeBridgeRuntimeCallbacks *,const char *,const char *)24 extern "C" bool native_bridge3_initialize(
25 const android::NativeBridgeRuntimeCallbacks* /* art_cbs */,
26 const char* /* app_code_cache_dir */,
27 const char* /* isa */) {
28 return true;
29 }
30
native_bridge3_loadLibrary(const char *,int)31 extern "C" void* native_bridge3_loadLibrary(const char* /* libpath */, int /* flag */) {
32 return nullptr;
33 }
34
native_bridge3_getTrampoline(void *,const char *,const char *,uint32_t)35 extern "C" void* native_bridge3_getTrampoline(void* /* handle */, const char* /* name */,
36 const char* /* shorty */, uint32_t /* len */) {
37 return nullptr;
38 }
39
native_bridge3_isSupported(const char *)40 extern "C" bool native_bridge3_isSupported(const char* /* libpath */) {
41 return false;
42 }
43
native_bridge3_getAppEnv(const char *)44 extern "C" const struct android::NativeBridgeRuntimeValues* native_bridge3_getAppEnv(
45 const char* /* abi */) {
46 return nullptr;
47 }
48
native_bridge3_isCompatibleWith(uint32_t version)49 extern "C" bool native_bridge3_isCompatibleWith(uint32_t version) {
50 // For testing, allow 1-3, but disallow 4+.
51 return version <= 3;
52 }
53
native_bridge3_dummy_signal_handler(int,siginfo_t *,void *)54 static bool native_bridge3_dummy_signal_handler(int, siginfo_t*, void*) {
55 // TODO: Implement something here. We'd either have to have a death test with a log here, or
56 // we'd have to be able to resume after the faulting instruction...
57 return true;
58 }
59
native_bridge3_getSignalHandler(int signal)60 extern "C" android::NativeBridgeSignalHandlerFn native_bridge3_getSignalHandler(int signal) {
61 if (signal == SIGSEGV) {
62 return &native_bridge3_dummy_signal_handler;
63 }
64 return nullptr;
65 }
66
native_bridge3_unloadLibrary(void *)67 extern "C" int native_bridge3_unloadLibrary(void* /* handle */) {
68 return 0;
69 }
70
native_bridge3_getError()71 extern "C" const char* native_bridge3_getError() {
72 return nullptr;
73 }
74
native_bridge3_isPathSupported(const char *)75 extern "C" bool native_bridge3_isPathSupported(const char* /* path */) {
76 return true;
77 }
78
native_bridge3_initAnonymousNamespace(const char *,const char *)79 extern "C" bool native_bridge3_initAnonymousNamespace(const char* /* public_ns_sonames */,
80 const char* /* anon_ns_library_path */) {
81 return true;
82 }
83
84 extern "C" android::native_bridge_namespace_t*
native_bridge3_createNamespace(const char *,const char *,const char *,uint64_t,const char *,android::native_bridge_namespace_t *)85 native_bridge3_createNamespace(const char* /* name */,
86 const char* /* ld_library_path */,
87 const char* /* default_library_path */,
88 uint64_t /* type */,
89 const char* /* permitted_when_isolated_path */,
90 android::native_bridge_namespace_t* /* parent_ns */) {
91 return nullptr;
92 }
93
native_bridge3_linkNamespaces(android::native_bridge_namespace_t *,android::native_bridge_namespace_t *,const char *)94 extern "C" bool native_bridge3_linkNamespaces(android::native_bridge_namespace_t* /* from */,
95 android::native_bridge_namespace_t* /* to */,
96 const char* /* shared_libs_soname */) {
97 return true;
98 }
99
native_bridge3_loadLibraryExt(const char *,int,android::native_bridge_namespace_t *)100 extern "C" void* native_bridge3_loadLibraryExt(const char* /* libpath */,
101 int /* flag */,
102 android::native_bridge_namespace_t* /* ns */) {
103 return nullptr;
104 }
105
106 android::NativeBridgeCallbacks NativeBridgeItf{
107 // v1
108 .version = 3,
109 .initialize = &native_bridge3_initialize,
110 .loadLibrary = &native_bridge3_loadLibrary,
111 .getTrampoline = &native_bridge3_getTrampoline,
112 .isSupported = &native_bridge3_isSupported,
113 .getAppEnv = &native_bridge3_getAppEnv,
114 // v2
115 .isCompatibleWith = &native_bridge3_isCompatibleWith,
116 .getSignalHandler = &native_bridge3_getSignalHandler,
117 // v3
118 .unloadLibrary = &native_bridge3_unloadLibrary,
119 .getError = &native_bridge3_getError,
120 .isPathSupported = &native_bridge3_isPathSupported,
121 .initAnonymousNamespace = &native_bridge3_initAnonymousNamespace,
122 .createNamespace = &native_bridge3_createNamespace,
123 .linkNamespaces = &native_bridge3_linkNamespaces,
124 .loadLibraryExt = &native_bridge3_loadLibraryExt};
125