Viewing file:  Wfree-nonheap-object.C (2.71 KB) -rw-r--r--
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/* PR ????? - No warning on attempts to access free object
Verify that attempts to deallocate objects by pointers with nonzero
offsets is diagnosed.
{ dg-do compile }
{ dg-options "-O2 -Wall -Wfree-nonheap-object" } */
typedef __INTPTR_TYPE__ intptr_t;
typedef __SIZE_TYPE__ size_t;
void sink (void*, ...);
extern char ecarr[];
extern void* eparr[];
extern char *eptr;
char* source (void);
void nowarn_op_delete (void *p, void ***ppp, size_t n, intptr_t iptr)
{
operator delete (p);
p = 0;
operator delete (p);
p = operator new (n);
sink (p);
operator delete (p);
p = operator new (n);
sink (p);
operator delete ((void*)iptr);
p = source ();
operator delete (p);
p = source ();
p = (char*)p - 1;
operator delete (p);
operator delete (**ppp);
operator delete (*ppp);
operator delete (ppp);
}
void warn_op_delete_cstaddr (void *p)
{
operator delete (p);
p = (void*)~0;
operator delete (p); // { dg-warning "called on a pointer to an unallocated object" } */
}
void warn_op_delete_funcaddr ()
{
void *p = (void*)&warn_op_delete_funcaddr;
operator delete (p); // { dg-warning "called on unallocated object 'void warn_op_delete_funcaddr()" } */
}
void warn_op_delete_string (void *p)
{
operator delete (p);
p = (void*)"";
operator delete (p); // { dg-warning "called on a pointer to an unallocated object" } */
}
void warn_op_delete_ptr_to_self (void *p)
{
operator delete (p);
p = &p;
operator delete (p); // { dg-warning "called on unallocated object 'p'" } */
}
void nowarn_op_new_delete (size_t n)
{
void *p = operator new (n);
sink (p);
operator delete (p);
}
void nowarn_op_new_delete_ptr_plus (size_t n)
{
void *p0_1 = operator new (n);
void *p1 = (char*)p0_1 + 1;
sink (p0_1, p1);
void *p0_2 = (char*)p1 - 1;
sink (p0_1, p1, p0_2);
operator delete (p0_2);
}
void warn_op_new_delete_cstoff (size_t n)
{
void *p = operator new (n);
void *q = (char*)p + 1;
sink (p, q);
operator delete (q); // { dg-warning "'void operator delete\\\(void\\\*\\\)' called on pointer '\[^'\]+' with nonzero offset 1" }
}
void warn_op_new_delete_ptr_plus (size_t n)
{
char *p = (char*)operator new (n);
sink (++p);
operator delete (p); // { dg-warning "called on pointer '\[^']+' with nonzero offset 1" }
}
void warn_op_delete_funcret_plus (size_t n)
{
char *p = source ();
sink (++p);
operator delete (p); // { dg-warning "called on pointer '\[^']+' with nonzero offset 1" }
}
void warn_op_delete_eptr_plus (int i)
{
extern char *ecp;
if (i < 1)
i = 1;
char *p = ecp + i;
sink (p);
operator delete (p); // { dg-warning "called on pointer '\[^']+' with nonzero offset \\\[1, \\d+]" }
}
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