File: msan_check_mem_is_initialized.cpp

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (28 lines) | stat: -rw-r--r-- 993 bytes parent folder | download | duplicates (5) 
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 -O0 -g -DPOSITIVE %s -o %t
// RUN: not %run %t 2>&1 | FileCheck %s
// RUN: MSAN_OPTIONS=verbosity=1 not %run %t 2>&1 | \
// RUN:     FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-VERBOSE

// RUN: %clangxx_msan -O0 -g %s -o %t && %run %t

#include <sanitizer/msan_interface.h>

int main(void) {
  char p[32] = {};
  __msan_poison(p + 10, 2);

  __msan_check_mem_is_initialized(p, 10);
  __msan_check_mem_is_initialized(p + 12, 30);
#ifdef POSITIVE
  __msan_check_mem_is_initialized(p + 5, 20);
  // CHECK: Uninitialized bytes in __msan_check_mem_is_initialized at offset 5 inside [0x{{.*}}, 20)
  // CHECK-VERBOSE: Shadow map of [0x{{.*}}, 0x{{.*}}), 20 bytes:
  // CHECK-VERBOSE: 0x{{.*}}: ..000000 0000ffff 00000000 00000000
  // CHECK-VERBOSE: 0x{{.*}}: 00000000 00...... ........ ........

  // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  // CHECK: #0 0x{{.*}}in main{{.*}}msan_check_mem_is_initialized.cpp:[[@LINE-7]]
#endif
  return 0;
}