1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
//===-- sanitizer_signal_interceptors.inc -----------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Signal interceptors for sanitizers.
//
//===----------------------------------------------------------------------===//
#include "interception/interception.h"
#include "sanitizer_common.h"
#include "sanitizer_internal_defs.h"
#include "sanitizer_platform_interceptors.h"
using namespace __sanitizer;
#if SANITIZER_INTERCEPT_BSD_SIGNAL
INTERCEPTOR(void *, bsd_signal, int signum, void *handler) {
if (GetHandleSignalMode(signum) == kHandleSignalExclusive) return 0;
return REAL(bsd_signal)(signum, handler);
}
#define INIT_BSD_SIGNAL COMMON_INTERCEPT_FUNCTION(bsd_signal)
#else // SANITIZER_INTERCEPT_BSD_SIGNAL
#define INIT_BSD_SIGNAL
#endif // SANITIZER_INTERCEPT_BSD_SIGNAL
#if SANITIZER_INTERCEPT_SIGNAL_AND_SIGACTION
INTERCEPTOR(void *, signal, int signum, void *handler) {
if (GetHandleSignalMode(signum) == kHandleSignalExclusive) return nullptr;
return REAL(signal)(signum, handler);
}
#define INIT_SIGNAL COMMON_INTERCEPT_FUNCTION(signal)
INTERCEPTOR(int, sigaction, int signum, const struct sigaction *act,
struct sigaction *oldact) {
if (GetHandleSignalMode(signum) == kHandleSignalExclusive) return 0;
return REAL(sigaction)(signum, act, oldact);
}
#define INIT_SIGACTION COMMON_INTERCEPT_FUNCTION(sigaction)
namespace __sanitizer {
int real_sigaction(int signum, const void *act, void *oldact) {
return REAL(sigaction)(signum, (const struct sigaction *)act,
(struct sigaction *)oldact);
}
} // namespace __sanitizer
#else // SANITIZER_INTERCEPT_SIGNAL_AND_SIGACTION
#define INIT_SIGNAL
#define INIT_SIGACTION
// We need to have defined REAL(sigaction) on other systems.
DEFINE_REAL(int, sigaction, int signum, const struct sigaction *act,
struct sigaction *oldact)
#endif // SANITIZER_INTERCEPT_SIGNAL_AND_SIGACTION
static void InitializeSignalInterceptors() {
static bool was_called_once;
CHECK(!was_called_once);
was_called_once = true;
INIT_BSD_SIGNAL;
INIT_SIGNAL;
INIT_SIGACTION;
}
|
