https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68201
Bug ID: 68201
Summary: alloc_size attribute and memory pools
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: bugzi...@poradnik-webmastera.com
Target Milestone: ---
When memory pool is used to allocate fixed-size blocks, size of block is often
stored in structure describing mempool. In such case it is not possible to tell
gcc via alloc_size attribute how much memory is allocated in pool_alloc
function. Please add new attribute or extend existing one to support this case
too. You can also provide new build-in function __builtin_set_object_size(ptr,
size) which would be used to handle all non-trivial cases.
Example:
struct MemPool
{
size_t block_size;
};
void* pool_alloc(struct MemPool *pool)
{
void *ptr = get_block_from_pool(pool);
__builtin_set_object_size(ptr, pool->block_size); // example
return ptr;
}
