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// Check that stores in signal handlers are not recorded in origin history.
// This is, in fact, undesired behavior caused by our chained origins
// implementation being not async-signal-safe.
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O3 %s -o %t && \
// RUN: not %run %t >%t.out 2>&1
// RUN: FileCheck %s < %t.out
// RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -O3 %s -o %t && \
// RUN: not %run %t >%t.out 2>&1
// RUN: FileCheck %s < %t.out
#include <signal.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
volatile int x, y;
void SignalHandler(int signo) {
y = x;
}
int main(int argc, char *argv[]) {
int volatile z;
x = z;
signal(SIGHUP, SignalHandler);
kill(getpid(), SIGHUP);
signal(SIGHUP, SIG_DFL);
return y;
}
// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
// CHECK-NOT: in SignalHandler
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