File: dll_intercept_strlen.cpp

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,696 kB
  • sloc: cpp: 7,438,781; ansic: 1,393,871; asm: 1,012,926; python: 241,771; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 8,596; ml: 5,082; perl: 4,730; makefile: 3,591; awk: 3,523; javascript: 2,251; xml: 892; fortran: 672
file content (28 lines) | stat: -rw-r--r-- 909 bytes parent folder | download | duplicates (21) 
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: %clang_cl_asan %Od %p/dll_host.cpp %Fe%t
// RUN: %clang_cl_asan %LD %Od %s %Fe%t.dll
// RUN: not %run %t %t.dll 2>&1 | FileCheck %s

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

extern "C" __declspec(dllexport)
int test_function() {
  char str[] = "Hello!";
  if (6 != strlen(str))
    return 1;
  printf("Initial test OK\n");
  fflush(0);
// CHECK: Initial test OK

  str[6] = '!';  // Removes '\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-NEXT: {{#0 .*}}strlen
// CHECK-NEXT: {{#1 .* test_function .*}}dll_intercept_strlen.cpp:[[@LINE-5]]
//
// CHECK: Address [[ADDR]] is located in stack of thread T0 at offset {{.*}} in frame
// CHECK-NEXT: test_function {{.*}}dll_intercept_strlen.cpp:
  return len > 42;
}