File: strndup.cpp

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (28 lines) | stat: -rw-r--r-- 1,032 bytes parent folder | download | duplicates (6) 
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
 
// RUN: %clangxx_msan %s -o %t && not %run %t 2>&1 | FileCheck --check-prefix=ON %s
// RUN: %clangxx_msan %s -o %t && MSAN_OPTIONS=intercept_strndup=0 %run %t 2>&1 | FileCheck --check-prefix=OFF --allow-empty %s

// When built as C on Linux, strndup is transformed to __strndup.
// RUN: %clangxx_msan -O3 -xc %s -o %t && not %run %t 2>&1 | FileCheck --check-prefix=ON %s

// UNSUPPORTED: target={{.*windows-msvc.*}}

#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <sanitizer/msan_interface.h>

int main(int argc, char **argv) {
  char kString[4] = "abc";
  __msan_poison(kString + 2, 1);
  char *copy = strndup(kString, 4); // BOOM
  assert(__msan_test_shadow(copy, 4) == 2); // Poisoning is preserved.
  free(copy);
  return 0;
  // ON: Uninitialized bytes in {{(__)?}}strndup at offset 2 inside [{{.*}}, 4)
  // ON: MemorySanitizer: use-of-uninitialized-value
  // ON: #0 {{.*}}main {{.*}}strndup.cpp:[[@LINE-6]]
  // ON-LABEL: SUMMARY
  // ON: {{.*}}strndup.cpp:[[@LINE-8]]
  // OFF-NOT: MemorySanitizer
}