File: pr78138.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 (24 lines) | stat: -rw-r--r-- 645 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
 
/* PR middle-end/78138 - missing warnings on buffer overflow with non-constant
   source length
   { dg-do compile }
   { dg-options "-O2 -Wformat-overflow" } */

char d [5];

__extension__ typedef __SIZE_TYPE__ size_t;

void* memcpy (void*, const void*, size_t);
extern char* strcpy (char*, const char*);

void f (int i, int j)
{
  strcpy (d, j ? "12345" : "123456");   /* { dg-warning ".strcpy. writing between 6 and 7 bytes into a region of size 5 " } */
}

void g (void *p)
{
  extern unsigned n;
  if (n < 17 || 32 < n) n = 7;

  memcpy (d, p, n);   /* { dg-warning ".memcpy. writing between 7 and 32 bytes into a region of size 5" } */
};