1 // RUN: %clangxx -O2 %s -o %t && %run %t 2>&1 | FileCheck %s
2
3 #include <stdio.h>
4
5 #if !defined(__GLIBC_PREREQ)
6 #define __GLIBC_PREREQ(a, b) 0
7 #endif
8
9 // getauxval() used instead of sysconf() in GetPageSize() is defined starting
10 // glbc version 2.16.
11 // Does not work with 2.31 and above at it calls sysconf for SIGSTKSZ.
12 #if __GLIBC_PREREQ(2, 16) && !__GLIBC_PREREQ(2, 31)
sysconf(int name)13 extern "C" long sysconf(int name) {
14 fprintf(stderr, "sysconf wrapper called: %d\n", name);
15 return 0;
16 }
17 #endif
18
main()19 int main() {
20 // All we need to check is that the sysconf() interceptor defined above was
21 // not called. Should it get called, it will crash right there, any
22 // instrumented code executed before sanitizer init is finished will crash
23 // accessing non-initialized sanitizer internals. Even if it will not crash
24 // in some configuration, it should never be called anyway.
25 fprintf(stderr, "Passed\n");
26 // CHECK-NOT: sysconf wrapper called
27 // CHECK: Passed
28 // CHECK-NOT: sysconf wrapper called
29 return 0;
30 }
31