Viewing file:  Wstringop-overflow-7.C (1.06 KB) -rw-r--r--
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/* PR c++/100876 - -Wmismatched-new-delete should either look through
or ignore placement new
{ dg-do compile }
{ dg-options "-O0 -Wall -Wno-array-bounds" } */
inline void* operator new (__SIZE_TYPE__, void *p) { return p; }
inline void* operator new[] (__SIZE_TYPE__, void *p) { return p; }
void* nowarn_placement_new_memset ()
{
struct S { int i; };
void *p = __builtin_malloc (sizeof (S));
S *q = new (p) S;
__builtin_memset (q, 0, sizeof (S));
return q;
}
void* warn_placement_new_memset ()
{
struct S { int i; };
void *p = __builtin_malloc (sizeof (S));
S *q = new (p) S;
__builtin_memset (q, 0, sizeof (S) + 1); // { dg-warning "\\\[-Wstringop-overflow" }
return q;
}
void* nowarn_placement_new_array_strncpy (const char *s)
{
void *p = __builtin_malloc (5);
char *q = new (p) char[5];
__builtin_strncpy (q, s, 5);
return q;
}
void* warn_placement_new_array_strncpy (const char *s)
{
void *p = __builtin_malloc (4);
char *q = new (p) char[5];
__builtin_strncpy (q, s, 5); // { dg-warning "\\\[-Wstringop-overflow" }
return q;
}
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