| // RUN: %clangxx_msan -O0 %s -o %t && %run %t | |
| #include <sys/types.h> | |
| #include <sys/socket.h> | |
| #include <netdb.h> | |
| #include <stdlib.h> | |
| void poison_stack_ahead() { | |
| char buf[100000]; | |
| // With -O0 this poisons a large chunk of stack. | |
| } | |
| int main(void) { | |
| poison_stack_ahead(); | |
| struct addrinfo *ai; | |
| // This should trigger loading of libnss_dns and friends. | |
| // Those libraries are typically uninstrumented.They will call strlen() on a | |
| // stack-allocated buffer, which is very likely to be poisoned. Test that we | |
| // don't report this as an UMR. | |
| int res = getaddrinfo("not-in-etc-hosts", NULL, NULL, &ai); | |
| return 0; | |
| } |