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
24extern "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
31extern "C" void* native_bridge3_loadLibrary(const char* /* libpath */, int /* flag */) {
32  return nullptr;
33}
34
35extern "C" void* native_bridge3_getTrampoline(void* /* handle */, const char* /* name */,
36                                             const char* /* shorty */, uint32_t /* len */) {
37  return nullptr;
38}
39
40extern "C" bool native_bridge3_isSupported(const char* /* libpath */) {
41  return false;
42}
43
44extern "C" const struct android::NativeBridgeRuntimeValues* native_bridge3_getAppEnv(
45    const char* /* abi */) {
46  return nullptr;
47}
48
49extern "C" bool native_bridge3_isCompatibleWith(uint32_t version) {
50  // For testing, allow 1-3, but disallow 4+.
51  return version <= 3;
52}
53
54static 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
60extern "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
67extern "C" int native_bridge3_unloadLibrary(void* /* handle */) {
68  return 0;
69}
70
71extern "C" const char* native_bridge3_getError() {
72  return nullptr;
73}
74
75extern "C" bool native_bridge3_isPathSupported(const char* /* path */) {
76  return true;
77}
78
79extern "C" bool native_bridge3_initAnonymousNamespace(const char* /* public_ns_sonames */,
80                                                      const char* /* anon_ns_library_path */) {
81    return true;
82}
83
84extern "C" android::native_bridge_namespace_t*
85native_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
94extern "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
100extern "C" void* native_bridge3_loadLibraryExt(const char* /* libpath */,
101                                               int /* flag */,
102                                               android::native_bridge_namespace_t* /* ns */) {
103  return nullptr;
104}
105
106android::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