libumem/common/malloc.c

41  * See umem_impl.h for the various magic numbers used, and the size
44  * The 'size' of the buffer includes the tags.  That is, we encode the
59 	size_t size;
62 	size = size_arg + sizeof (malloc_data_t);
65 	if (size > UMEM_SECOND_ALIGN) {
66 		size += sizeof (malloc_data_t);
67 		high_size = (size >> 32);
70 	if (size < size_arg) {
74 	ret = (malloc_data_t *)_umem_alloc(size, UMEM_DEFAULT);
76 		if (size <= UMEM_MAXBUF)
83 		uint32_t low_size = (uint32_t)size;
97 	} else if (size > UMEM_SECOND_ALIGN) {
98 		uint32_t low_size = (uint32_t)size;
108 		ret->malloc_size = size;
109 		ret->malloc_stat = UMEM_MALLOC_ENCODE(MALLOC_MAGIC, size);
118 	size_t size = nelem * elsize;
121 	if (nelem > 0 && elsize > 0 && size/nelem != elsize) {
126 	retval = malloc(size);
130 	(void) memset(retval, 0, size);
144 	size_t size;
172 	size = size_arg + overhead;
180 	if (size < size_arg) {
185 	buf = vmem_xalloc(umem_memalign_arena, size, align, phase,
199 		uint32_t low_size = (uint32_t)size;
202 		uint32_t high_size = (uint32_t)(size >> 32);
222 valloc(size_t size)
224 	return (memalign(pagesize, size));
234  * On success, returns the data size through *data_size_arg, if (!is_free).
241     int do_free,		/* free the buffer, or just get its size? */
247 	size_t size;
256 	size = buf->malloc_size;
258 	switch (UMEM_MALLOC_DECODE(buf->malloc_stat, size)) {
262 		data_size = size - sizeof (malloc_data_t);
272 		data_size = size - 2 * sizeof (malloc_data_t);
291 		size += high_size << 32;
294 		data_size = size - 2 * sizeof (malloc_data_t);
321 		size += high_size << 32;
331 		data_size = size - overhead;
354 		_umem_free(base, size);
363 		vmem_xfree(umem_memalign_arena, base, size);
398 	 * get the old data size without freeing the buffer
405 	if (newsize == oldsize)		/* size didn't change */