| /* PR 35503 - Warn about restricted pointers |
| Test to exercise that -Wrestrict warnings are issued for memory and |
| sring functions when they are declared in system headers (i.e., not |
| just when they are explicitly declared in the source file.) |
| Also verify that the warnings are issued even for calls where the |
| source of the aliasing violation is in a different function than |
| the restricted call. |
| { dg-do compile } |
| { dg-options "-O2 -Wrestrict" } */ |
| |
| #include <string.h> |
| |
| static void wrap_memcpy (void *d, const void *s, size_t n) |
| { |
| memcpy (d, s, n); /* { dg-warning "accessing 2 bytes at offsets 0 and 1 overlaps 1 byte at offset 1" "memcpy" } */ |
| } |
| |
| void call_memcpy (char *d) |
| { |
| const void *s = d + 1; |
| wrap_memcpy (d, s, 2); |
| } |
| |
| |
| static void wrap_strcat (char *d, const char *s) |
| { |
| strcat (d, s); /* { dg-warning "source argument is the same as destination" "strcat" } */ |
| } |
| |
| void call_strcat (char *d) |
| { |
| const char *s = d; |
| wrap_strcat (d, s); |
| } |
| |
| |
| static void wrap_strcpy (char *d, const char *s) |
| { |
| strcpy (d, s); /* { dg-warning "source argument is the same as destination" "strcpy" } */ |
| } |
| |
| void call_strcpy (char *d) |
| { |
| const char *s = d; |
| wrap_strcpy (d, s); |
| } |
| |
| |
| static void wrap_strncat (char *d, const char *s, size_t n) |
| { |
| strncat (d, s, n); /* { dg-warning "source argument is the same as destination" "strncat" } */ |
| } |
| |
| void call_strncat (char *d, size_t n) |
| { |
| const char *s = d; |
| wrap_strncat (d, s, n); |
| } |
| |
| |
| static void wrap_strncpy (char *d, const char *s, size_t n) |
| { |
| strncpy (d, s, n); /* { dg-warning "source argument is the same as destination" "strncpy" } */ |
| } |
| |
| void call_strncpy (char *d, size_t n) |
| { |
| const char *s = d; |
| wrap_strncpy (d, s, n); |
| } |