File: overflow.c

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb11u2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,634,820 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (31 lines) | stat: -rw-r--r-- 636 bytes parent folder | download | duplicates (27) 
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: %clang_safestack %s -o %t
// RUN: %run %t

// RUN: %clang_nosafestack -fno-stack-protector %s -o %t
// RUN: not %run %t

// Test that buffer overflows on the unsafe stack do not affect variables on the
// safe stack.

// REQUIRES: stable-runtime

extern void *memset(void *, int, __typeof__(sizeof(0)));

__attribute__((noinline))
void fct(volatile int *buffer)
{
  memset(buffer - 1, 0, 7 * sizeof(int));
}

int main(int argc, char **argv)
{
  int prebuf[7];
  int value1 = 42;
  int buffer[5];
  int value2 = 42;
  int postbuf[7];
  fct(prebuf + 1);
  fct(postbuf + 1);
  fct(buffer);
  return value1 != 42 || value2 != 42;
}