File: sysconf_interceptor_bypass_test.cpp

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-6~deb10u4
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 1,418,792 kB
  • sloc: cpp: 5,290,827; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,900; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,892; xml: 953; cs: 573; fortran: 539
file content (31 lines) | stat: -rw-r--r-- 1,010 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
// RUN: %clangxx -O2 %s -o %t && %run %t 2>&1 | FileCheck %s
// XFAIL: *

#include <stdio.h>

#if !defined(__GLIBC_PREREQ)
#define __GLIBC_PREREQ(a, b) 0
#endif

// getauxval() used instead of sysconf() in GetPageSize() is defined starting
// glbc version 2.16.
// Does not work with 2.31 and above at it calls sysconf for SIGSTKSZ.
#if __GLIBC_PREREQ(2, 16) && !__GLIBC_PREREQ(2, 31)
extern "C" long sysconf(int name) {
  fprintf(stderr, "sysconf wrapper called\n");
  return 0;
}
#endif

int main() {
  // All we need to check is that the sysconf() interceptor defined above was
  // not called. Should it get called, it will crash right there, any
  // instrumented code executed before sanitizer init is finished will crash
  // accessing non-initialized sanitizer internals. Even if it will not crash
  // in some configuration, it should never be called anyway.
  fprintf(stderr, "Passed\n");
  // CHECK-NOT: sysconf wrapper called
  // CHECK: Passed
  // CHECK-NOT: sysconf wrapper called
  return 0;
}