File: intercept_strlen.cpp

package info (click to toggle)
llvm-toolchain-18 1%3A18.1.8-18
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 1,908,340 kB
  • sloc: cpp: 6,667,937; ansic: 1,440,452; asm: 883,619; python: 230,549; objc: 76,880; f90: 74,238; lisp: 35,989; pascal: 16,571; sh: 10,229; perl: 7,459; ml: 5,047; awk: 3,523; makefile: 2,987; javascript: 2,149; xml: 892; fortran: 649; cs: 573
file content (27 lines) | stat: -rw-r--r-- 838 bytes parent folder | download | duplicates (20) 
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
 
// RUN: %clang_cl_asan %Od %s %Fe%t
// RUN: not %run %t 2>&1 | FileCheck %s

#include <stdio.h>
#include <string.h>

int main() {
  char str[] = "Hello";
  if (5 != strlen(str))
    return 1;

  printf("Initial test OK\n");
  fflush(0);
// CHECK: Initial test OK

  str[5] = '!';  // Losing '\0' at the end.
  int len = strlen(str);
// CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
// FIXME: Should be READ of size 1, see issue 155.
// CHECK: READ of size {{[0-9]+}} at [[ADDR]] thread T0
// CHECK:      strlen 
// CHECK-NEXT: main {{.*}}intercept_strlen.cpp:[[@LINE-5]]
// CHECK: Address [[ADDR]] is located in stack of thread T0 at offset {{.*}} in frame
// CHECK-NEXT: main {{.*}}intercept_strlen.cpp
// CHECK: 'str'{{.*}} <== Memory access at offset {{.*}} overflows this variable
  return len < 6;
}