File: pr79223.c

package info (click to toggle)
gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 680,956 kB
  • sloc: ansic: 3,237,715; cpp: 896,882; ada: 772,854; f90: 144,254; asm: 68,788; makefile: 67,456; sh: 29,743; exp: 28,045; objc: 15,273; fortran: 11,885; python: 7,369; pascal: 5,375; awk: 3,725; perl: 2,872; yacc: 316; xml: 311; ml: 285; lex: 198; haskell: 122
file content (37 lines) | stat: -rw-r--r-- 1,010 bytes parent folder | download | duplicates (4) 
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
32
33
34
35
36
37
 
/* PR middle-end/79223 - missing -Wstringop-overflow on a memmove overflow
   { dg-do compile }
   { dg-additional-options "-O2 -Wall -Wno-array-bounds -std=gnu99" }  */

typedef __SIZE_TYPE__ size_t;

extern void* memcpy (void*, const void*, size_t);
extern void* mempcpy (void*, const void*, size_t);
extern void* memmove (void*, const void*, size_t);

char d[3];
char s[4];

size_t range (void)
{
  extern size_t size ();
  size_t n = size ();
  if (n <= sizeof d)
    return sizeof d + 1;

  return n;
}

void test_memcpy (void)
{
  memcpy (d, s, range ());   /* { dg-warning ".memcpy. writing 4 or more bytes into a region of size 3 overflows the destination" } */
}

void test_mempcpy (void)
{
  mempcpy (d, s, range ());   /* { dg-warning ".mempcpy. writing 4 or more bytes into a region of size 3 overflows the destination" } */
}

void test_memmove (void)
{
  memmove (d + 1, d, range ());   /* { dg-warning ".memmove. writing 4 or more bytes into a region of size 2 overflows the destination" } */
}