/** * Allocation of memory block, running 'try to give memory back' callbacks, if there is not enough memory. * * Note: * if there is still not enough memory after running the callbacks * - NULL value will be returned if parmeter 'ret_null_on_error' is true * - the engine will terminate with ERR_OUT_OF_MEMORY if 'ret_null_on_error' is false * * @return NULL, if the required memory size is 0 * also NULL, if 'ret_null_on_error' is true and the allocation fails because of there is not enough memory */ static void * jmem_heap_gc_and_alloc_block (const size_t size, /**< required memory size */ bool ret_null_on_error) /**< indicates whether return null or terminate with ERR_OUT_OF_MEMORY on out of memory */ { if (unlikely (size == 0)) { return NULL; } VALGRIND_FREYA_CHECK_MEMPOOL_REQUEST; #ifdef JMEM_GC_BEFORE_EACH_ALLOC jmem_run_free_unused_memory_callbacks (JMEM_FREE_UNUSED_MEMORY_SEVERITY_HIGH); #endif /* JMEM_GC_BEFORE_EACH_ALLOC */ if (JERRY_CONTEXT (jmem_heap_allocated_size) + size >= JERRY_CONTEXT (jmem_heap_limit)) { jmem_run_free_unused_memory_callbacks (JMEM_FREE_UNUSED_MEMORY_SEVERITY_LOW); } void *data_space_p = jmem_heap_alloc_block_internal (size); if (likely (data_space_p != NULL)) { VALGRIND_FREYA_MALLOCLIKE_SPACE (data_space_p, size); return data_space_p; } for (jmem_free_unused_memory_severity_t severity = JMEM_FREE_UNUSED_MEMORY_SEVERITY_LOW; severity <= JMEM_FREE_UNUSED_MEMORY_SEVERITY_HIGH; severity = (jmem_free_unused_memory_severity_t) (severity + 1)) { jmem_run_free_unused_memory_callbacks (severity); data_space_p = jmem_heap_alloc_block_internal (size); if (likely (data_space_p != NULL)) { VALGRIND_FREYA_MALLOCLIKE_SPACE (data_space_p, size); return data_space_p; } } JERRY_ASSERT (data_space_p == NULL); if (!ret_null_on_error) { jerry_fatal (ERR_OUT_OF_MEMORY); } return data_space_p; } /* jmem_heap_gc_and_alloc_block */
/** * Allocate a chunk of specified size * * @return pointer to allocated chunk, if allocation was successful, * or NULL - if not enough memory. */ uint8_t* __attr_always_inline___ mem_pools_alloc (void) { #ifdef MEM_GC_BEFORE_EACH_ALLOC mem_run_try_to_give_memory_back_callbacks (MEM_TRY_GIVE_MEMORY_BACK_SEVERITY_HIGH); #endif /* MEM_GC_BEFORE_EACH_ALLOC */ mem_check_pools (); do { if (mem_free_chunk_p != NULL) { mem_pool_chunk_t *chunk_p = mem_free_chunk_p; MEM_POOLS_STAT_ALLOC_CHUNK (); #ifndef JERRY_NDEBUG mem_free_chunks_number--; #endif /* !JERRY_NDEBUG */ VALGRIND_DEFINED_SPACE (chunk_p, MEM_POOL_CHUNK_SIZE); mem_free_chunk_p = chunk_p->u.free.next_p; VALGRIND_UNDEFINED_SPACE (chunk_p, MEM_POOL_CHUNK_SIZE); mem_check_pools (); VALGRIND_FREYA_MALLOCLIKE_SPACE (chunk_p, MEM_POOL_CHUNK_SIZE); return (uint8_t *) chunk_p; } else { mem_pools_alloc_longpath (); /* the assertion guarantees that there will be no more than two iterations */ JERRY_ASSERT (mem_free_chunk_p != NULL); } } while (true); } /* mem_pools_alloc */