Viewing file:  data-model-5d.c (1.33 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* A toy re-implementation of CPython's object model. */
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include "analyzer-decls.h"
typedef struct base_obj
{
struct type_obj *ob_type;
int ob_refcnt;
} base_obj;
typedef struct type_obj
{
base_obj tp_base;
void (*tp_dealloc) (base_obj *);
} type_obj;
typedef struct boxed_int_obj
{
base_obj int_base;
int int_val;
} boxed_int_obj;
extern void int_del (base_obj *);
type_obj type_type = {
{ &type_type, 1}
};
type_obj boxed_int_type = {
{ &type_type, 1},
int_del
};
base_obj *alloc_obj (type_obj *ob_type, size_t sz)
{
base_obj *obj = (base_obj *)malloc (sz);
if (!obj)
return NULL;
obj->ob_type = ob_type;
obj->ob_refcnt = 1;
return obj;
}
base_obj *new_int_obj (int val)
{
boxed_int_obj *int_obj
= (boxed_int_obj *)alloc_obj (&boxed_int_type, sizeof (boxed_int_obj));
if (!int_obj)
return NULL;
int_obj->int_val = val;
return (base_obj *)int_obj;
}
void unref (base_obj *obj)
{
if (--obj->ob_refcnt == 0)
obj->ob_type->tp_dealloc (obj);
}
void test_1 (const char *str)
{
base_obj *obj = new_int_obj (42);
if (!obj)
return;
__analyzer_eval (((boxed_int_obj *)obj)->int_val == 42); /* { dg-warning "TRUE" } */
__analyzer_eval (obj->ob_refcnt == 1); /* { dg-warning "TRUE" } */
unref (obj);
} /* { dg-bogus "leak" "" } */
|
