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/* Test the attribute counted_by for pointer fields and its usage in
* __builtin_dynamic_object_size: when the type of the pointer
* is casting to another type. */
/* { dg-do run } */
/* { dg-options "-O2" } */
#include "builtin-object-size-common.h"
typedef unsigned short u16;
struct info {
u16 data_len;
char *data __attribute__((counted_by(data_len)));
};
struct foo {
int a;
int b;
};
static __attribute__((__noinline__))
struct info *setup ()
{
struct info *p;
size_t bytes = 3 * sizeof(struct foo);
p = (struct info *) malloc (sizeof (struct info));
p->data = (char *) malloc (bytes);
p->data_len = bytes;
return p;
}
static void
__attribute__((__noinline__)) report (struct info *p)
{
struct foo *bar = (struct foo *)p->data;
EXPECT(__builtin_dynamic_object_size((char *)(bar + 1), 1),
sizeof (struct foo) * 2);
EXPECT(__builtin_dynamic_object_size((char *)(bar + 2), 1),
sizeof (struct foo));
}
void cleanup (struct info *p)
{
free (p->data);
free (p);
}
int main(int argc, char *argv[])
{
struct info *p = setup();
report(p);
cleanup (p);
return 0;
}
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