| 1 | // Check that stores in signal handlers are not recorded in origin history. |
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| 2 | // This is, in fact, undesired behavior caused by our chained origins |
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| 3 | // implementation being not async-signal-safe. |
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| 4 | |
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| 5 | // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O3 %s -o %t && \ |
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| 6 | // RUN: not %run %t >%t.out 2>&1 |
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| 7 | // RUN: FileCheck %s < %t.out |
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| 8 | |
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| 9 | // RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -O3 %s -o %t && \ |
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| 10 | // RUN: not %run %t >%t.out 2>&1 |
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| 11 | // RUN: FileCheck %s < %t.out |
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| 12 | |
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| 13 | // Reported deadly signal due to stack-overflow |
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| 14 | // XFAIL: target={{.*netbsd.*}} |
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| 15 | |
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| 16 | #include <signal.h> |
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| 17 | #include <stdio.h> |
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| 18 | #include <sys/types.h> |
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| 19 | #include <unistd.h> |
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| 20 | |
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| 21 | volatile int x, y; |
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| 22 | |
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| 23 | void SignalHandler(int signo) { |
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| 24 | y = x; |
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| 25 | } |
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| 26 | |
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| 27 | int main(int argc, char *argv[]) { |
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| 28 | int volatile z; |
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| 29 | x = z; |
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| 30 | |
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| 31 | signal(SIGHUP, handler: SignalHandler); |
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| 32 | kill(pid: getpid(), SIGHUP); |
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| 33 | signal(SIGHUP, SIG_DFL); |
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| 34 | |
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| 35 | return y; |
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| 36 | } |
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| 37 | |
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| 38 | // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value |
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| 39 | // CHECK-NOT: in SignalHandler |
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| 40 | |
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