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// RUN: %clangxx_dfsan %s -o %t && %run %t
// RUN: %clangxx_dfsan -mllvm -dfsan-track-origins=1 %s -o %t && %run %t
// RUN: %clangxx_dfsan -mllvm -dfsan-track-origins=1 -mllvm -dfsan-instrument-with-call-threshold=0 %s -o %t && %run %t
//
// Test that the state of shadows from a sigaction handler are consistent.
#include <signal.h>
#include <stdarg.h>
#include <sanitizer/dfsan_interface.h>
#include <assert.h>
#include <sys/time.h>
#include <stdio.h>
const int kSigCnt = 200;
int x = 0;
__attribute__((noinline))
int f(int a) {
return a;
}
__attribute__((noinline))
void g() {
int r = f(x);
const dfsan_label r_label = dfsan_get_label(r);
assert(r_label == 8 || r_label == 0);
return;
}
int sigcnt;
void SignalHandler(int signo) {
assert(signo == SIGPROF);
int a = 0;
dfsan_set_label(4, &a, sizeof(a));
(void)f(a);
++sigcnt;
}
int main() {
struct sigaction psa = {};
psa.sa_handler = SignalHandler;
int r = sigaction(SIGPROF, &psa, NULL);
itimerval itv;
itv.it_interval.tv_sec = 0;
itv.it_interval.tv_usec = 100;
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 100;
setitimer(ITIMER_PROF, &itv, NULL);
dfsan_set_label(8, &x, sizeof(x));
do {
g();
} while (sigcnt < kSigCnt);
itv.it_interval.tv_sec = 0;
itv.it_interval.tv_usec = 0;
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 0;
setitimer(ITIMER_PROF, &itv, NULL);
signal(SIGPROF, SIG_DFL);
return 0;
}
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