| 1 | // RUN: %clangxx_msan -O0 %s -o %t && %run %t |
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| 2 | |
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| 3 | #include <sys/types.h> |
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| 4 | #include <sys/socket.h> |
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| 5 | #include <netdb.h> |
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| 6 | #include <stdlib.h> |
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| 7 | |
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| 8 | void poison_stack_ahead() { |
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| 9 | char buf[100000]; |
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| 10 | // With -O0 this poisons a large chunk of stack. |
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| 11 | } |
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| 12 | |
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| 13 | int main(void) { |
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| 14 | poison_stack_ahead(); |
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| 15 | |
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| 16 | struct addrinfo *ai; |
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| 17 | |
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| 18 | // This should trigger loading of libnss_dns and friends. |
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| 19 | // Those libraries are typically uninstrumented.They will call strlen() on a |
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| 20 | // stack-allocated buffer, which is very likely to be poisoned. Test that we |
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| 21 | // don't report this as an UMR. |
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| 22 | int res = getaddrinfo(name: "not-in-etc-hosts" , NULL, NULL, pai: &ai); |
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| 23 | return 0; |
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| 24 | } |
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| 25 | |
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