1 /*
2 * Copyright (C) 2015 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 <errno.h>
18 #include <signal.h>
19 #include <stdarg.h>
20 #include <sys/ptrace.h>
21
22 #include <string>
23
24 #include "ptrace_fake.h"
25
26 siginfo_t g_fake_si = {.si_signo = 0};
27
ptrace_set_fake_getsiginfo(const siginfo_t & si)28 void ptrace_set_fake_getsiginfo(const siginfo_t& si) {
29 g_fake_si = si;
30 }
31
32 #if !defined(__BIONIC__)
ptrace_fake(enum __ptrace_request request,...)33 extern "C" long ptrace_fake(enum __ptrace_request request, ...) {
34 #else
35 extern "C" long ptrace_fake(int request, ...) {
36 #endif
37 if (request == PTRACE_GETSIGINFO) {
38 if (g_fake_si.si_signo == 0) {
39 errno = EFAULT;
40 return -1;
41 }
42
43 va_list ap;
44 va_start(ap, request);
45 va_arg(ap, int);
46 va_arg(ap, int);
47 siginfo_t* si = va_arg(ap, siginfo*);
48 va_end(ap);
49 *si = g_fake_si;
50 return 0;
51 }
52 return -1;
53 }
54