sigchain_dummy.cc revision 277ccbd200ea43590dfc06a93ae184a765327ad0 
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#include <stdio.h>
18#include <stdlib.h>
19
20#ifdef HAVE_ANDROID_OS
21#include <android/log.h>
22#else
23#include <stdarg.h>
24#include <iostream>
25#endif
26
27#include "sigchain.h"
28
29#define ATTRIBUTE_UNUSED __attribute__((__unused__))
30
31static void log(const char* format, ...) {
32  char buf[256];
33  va_list ap;
34  va_start(ap, format);
35  vsnprintf(buf, sizeof(buf), format, ap);
36#ifdef HAVE_ANDROID_OS
37  __android_log_write(ANDROID_LOG_ERROR, "libsigchain", buf);
38#else
39  std::cout << buf << "\n";
40#endif
41  va_end(ap);
42}
43
44namespace art {
45
46
47extern "C" void ClaimSignalChain(int signal ATTRIBUTE_UNUSED,
48                                 struct sigaction* oldaction ATTRIBUTE_UNUSED) {
49  log("ClaimSignalChain is not exported by the main executable.");
50  abort();
51}
52
53extern "C" void UnclaimSignalChain(int signal ATTRIBUTE_UNUSED) {
54  log("UnclaimSignalChain is not exported by the main executable.");
55  abort();
56}
57
58extern "C" void InvokeUserSignalHandler(int sig ATTRIBUTE_UNUSED,
59                                        siginfo_t* info ATTRIBUTE_UNUSED,
60                                        void* context ATTRIBUTE_UNUSED) {
61  log("InvokeUserSignalHandler is not exported by the main executable.");
62  abort();
63}
64
65extern "C" void InitializeSignalChain() {
66  log("InitializeSignalChain is not exported by the main executable.");
67  abort();
68}
69
70extern "C" void EnsureFrontOfChain(int signal ATTRIBUTE_UNUSED,
71                                   struct sigaction* expected_action ATTRIBUTE_UNUSED) {
72  log("EnsureFrontOfChain is not exported by the main executable.");
73  abort();
74}
75
76}  // namespace art
77