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
|
// RUN: %clang_dfsan -DUSE_SIGNAL_ACTION %s -o %t && %run %t
// RUN: %clang_dfsan %s -o %t && %run %t
//
// REQUIRES: x86_64-target-arch
#include <sanitizer/dfsan_interface.h>
#include <assert.h>
#include <signal.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
volatile int x;
volatile int z = 1;
void SignalHandler(int signo) {
assert(dfsan_get_label(signo) == 0);
x = z;
}
void SignalAction(int signo, siginfo_t *si, void *uc) {
assert(dfsan_get_label(signo) == 0);
assert(dfsan_get_label(si) == 0);
assert(dfsan_get_label(uc) == 0);
assert(0 == dfsan_read_label(si, sizeof(*si)));
assert(0 == dfsan_read_label(uc, sizeof(ucontext_t)));
x = z;
}
int main(int argc, char *argv[]) {
dfsan_set_label(8, (void *)&z, sizeof(z));
struct sigaction sa = {};
#ifdef USE_SIGNAL_ACTION
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = SignalAction;
#else
sa.sa_handler = SignalHandler;
#endif
int r = sigaction(SIGHUP, &sa, NULL);
assert(dfsan_get_label(r) == 0);
kill(getpid(), SIGHUP);
signal(SIGHUP, SIG_DFL);
assert(x == 1);
return 0;
}
|
