/*
* heap_coalesce_huge -- finds neighbours of a huge block, removes them from the
* volatile state and returns the resulting block
*/
struct memory_block
heap_coalesce_huge(struct palloc_heap *heap, const struct memory_block *m)
{
const struct memory_block *blocks[3] = {NULL, m, NULL};
struct bucket *b = heap_get_default_bucket(heap);
struct memory_block prev = MEMORY_BLOCK_NONE;
if (heap_get_adjacent_free_block(heap, m, &prev, 1) == 0 &&
b->c_ops->get_rm_exact(b->container, &prev) == 0) {
blocks[0] = &prev;
}
struct memory_block next = MEMORY_BLOCK_NONE;
if (heap_get_adjacent_free_block(heap, m, &next, 0) == 0 &&
b->c_ops->get_rm_exact(b->container, &next) == 0) {
blocks[2] = &next;
}
return heap_coalesce(heap, blocks, 3);
}
/*
* heap_free_block -- creates free persistent state of a memory block
*/
struct memory_block
heap_free_block(PMEMobjpool *pop, struct bucket *b,
struct memory_block m, void *hdr, uint64_t *op_result)
{
struct memory_block *blocks[3] = {NULL, &m, NULL};
struct memory_block prev = {0};
if (heap_get_adjacent_free_block(pop, &prev, m, 1) == 0 &&
bucket_get_rm_block_exact(b, prev) == 0) {
blocks[0] = &prev;
}
struct memory_block next = {0};
if (heap_get_adjacent_free_block(pop, &next, m, 0) == 0 &&
bucket_get_rm_block_exact(b, next) == 0) {
blocks[2] = &next;
}
struct memory_block res = heap_coalesce(pop, blocks, 3, HEAP_OP_FREE,
hdr, op_result);
return res;
}
/*
* prealloc_construct -- resizes an existing memory block with a constructor
*
* The block offset is written persistently into the off variable, but only
* after the constructor function has been called.
*
* If successful function returns zero. Otherwise an error number is returned.
*/
int
prealloc_construct(PMEMobjpool *pop, uint64_t *off, size_t size,
void (*constructor)(PMEMobjpool *pop, void *ptr, void *arg), void *arg,
uint64_t data_off)
{
if (size <= pmalloc_usable_size(pop, *off))
return 0;
size_t sizeh = size + sizeof (struct allocation_header);
int err = 0;
struct allocation_header *alloc = alloc_get_header(pop, *off);
struct bucket *b = heap_get_best_bucket(pop, alloc->size);
uint32_t add_size_idx = bucket_calc_units(b, sizeh - alloc->size);
uint32_t new_size_idx = bucket_calc_units(b, sizeh);
uint64_t real_size = new_size_idx * bucket_unit_size(b);
struct memory_block cnt = get_mblock_from_alloc(pop, b, alloc);
if ((err = heap_lock_if_run(pop, cnt)) != 0)
return err;
struct memory_block next = {0};
if ((err = heap_get_adjacent_free_block(pop, &next, cnt, 0)) != 0)
goto error;
if (next.size_idx < add_size_idx) {
err = ENOMEM;
goto error;
}
if ((err = heap_get_exact_block(pop, b, &next,
add_size_idx)) != 0)
goto error;
struct memory_block *blocks[2] = {&cnt, &next};
uint64_t op_result;
void *hdr;
struct memory_block m =
heap_coalesce(pop, blocks, 2, HEAP_OP_ALLOC, &hdr, &op_result);
void *block_data = heap_get_block_data(pop, m);
void *datap = block_data + sizeof (struct allocation_header);
if (constructor != NULL)
constructor(pop, datap + data_off, arg);
struct lane_section *lane;
if ((err = lane_hold(pop, &lane, LANE_SECTION_ALLOCATOR)) != 0)
goto error;
struct allocator_lane_section *sec =
(struct allocator_lane_section *)lane->layout;
redo_log_store(pop, sec->redo, ALLOC_OP_REDO_PTR_OFFSET,
pop_offset(pop, &alloc->size), real_size);
redo_log_store_last(pop, sec->redo, ALLOC_OP_REDO_HEADER,
pop_offset(pop, hdr), op_result);
redo_log_process(pop, sec->redo, MAX_ALLOC_OP_REDO);
if (lane_release(pop) != 0) {
ERR("Failed to release the lane");
ASSERT(0);
}
if (heap_unlock_if_run(pop, cnt) != 0) {
ERR("Failed to release run lock");
ASSERT(0);
}
return 0;
error:
if (heap_unlock_if_run(pop, cnt) != 0) {
ERR("Failed to release run lock");
ASSERT(0);
}
return err;
}
/*
* prealloc_construct -- resizes an existing memory block with a constructor
*
* The block offset is written persistently into the off variable, but only
* after the constructor function has been called.
*
* If successful function returns zero. Otherwise an error number is returned.
*/
int
prealloc_construct(PMEMobjpool *pop, uint64_t *off, size_t size,
void (*constructor)(PMEMobjpool *pop, void *ptr,
size_t usable_size, void *arg), void *arg, uint64_t data_off)
{
if (size <= pmalloc_usable_size(pop, *off))
return 0;
size_t sizeh = size + sizeof (struct allocation_header);
int err;
struct allocation_header *alloc = alloc_get_header(pop, *off);
struct lane_section *lane;
lane_hold(pop, &lane, LANE_SECTION_ALLOCATOR);
struct bucket *b = heap_get_best_bucket(pop, alloc->size);
uint32_t add_size_idx = b->calc_units(b, sizeh - alloc->size);
uint32_t new_size_idx = b->calc_units(b, sizeh);
uint64_t real_size = new_size_idx * b->unit_size;
struct memory_block cnt = get_mblock_from_alloc(pop, alloc);
heap_lock_if_run(pop, cnt);
struct memory_block next = {0, 0, 0, 0};
if ((err = heap_get_adjacent_free_block(pop, b, &next, cnt, 0)) != 0)
goto out;
if (next.size_idx < add_size_idx) {
err = ENOMEM;
goto out;
}
if ((err = heap_get_exact_block(pop, b, &next, add_size_idx)) != 0)
goto out;
struct memory_block *blocks[2] = {&cnt, &next};
uint64_t op_result;
void *hdr;
struct memory_block m =
heap_coalesce(pop, blocks, 2, HEAP_OP_ALLOC, &hdr, &op_result);
void *block_data = heap_get_block_data(pop, m);
void *datap = (char *)block_data + sizeof (struct allocation_header);
void *userdatap = (char *)datap + data_off;
/* mark new part as accessible and undefined */
VALGRIND_DO_MAKE_MEM_UNDEFINED(pop, (char *)block_data + alloc->size,
real_size - alloc->size);
/* resize allocated space */
VALGRIND_DO_MEMPOOL_CHANGE(pop, userdatap, userdatap,
real_size - sizeof (struct allocation_header) - data_off);
if (constructor != NULL)
constructor(pop, userdatap,
real_size - sizeof (struct allocation_header) -
data_off, arg);
struct allocator_lane_section *sec =
(struct allocator_lane_section *)lane->layout;
redo_log_store(pop, sec->redo, ALLOC_OP_REDO_PTR_OFFSET,
pop_offset(pop, &alloc->size), real_size);
redo_log_store_last(pop, sec->redo, ALLOC_OP_REDO_HEADER,
pop_offset(pop, hdr), op_result);
redo_log_process(pop, sec->redo, MAX_ALLOC_OP_REDO);
out:
heap_unlock_if_run(pop, cnt);
lane_release(pop);
return err;
}
static void
test_heap()
{
struct mock_pop *mpop = Malloc(MOCK_POOL_SIZE);
PMEMobjpool *pop = &mpop->p;
memset(pop, 0, MOCK_POOL_SIZE);
pop->size = MOCK_POOL_SIZE;
pop->heap_size = MOCK_POOL_SIZE - sizeof(PMEMobjpool);
pop->heap_offset = (uint64_t)((uint64_t)&mpop->heap - (uint64_t)mpop);
pop->persist = obj_heap_persist;
UT_ASSERT(heap_check(pop) != 0);
UT_ASSERT(heap_init(pop) == 0);
UT_ASSERT(heap_boot(pop) == 0);
UT_ASSERT(pop->heap != NULL);
struct bucket *b_small = heap_get_best_bucket(pop, 1);
struct bucket *b_big = heap_get_best_bucket(pop, 2048);
UT_ASSERT(b_small->unit_size < b_big->unit_size);
struct bucket *b_def = heap_get_best_bucket(pop, CHUNKSIZE);
UT_ASSERT(b_def->unit_size == CHUNKSIZE);
/* new small buckets should be empty */
UT_ASSERT(b_small->type == BUCKET_RUN);
UT_ASSERT(b_big->type == BUCKET_RUN);
struct memory_block blocks[MAX_BLOCKS] = {
{0, 0, 1, 0},
{0, 0, 1, 0},
{0, 0, 1, 0}
};
for (int i = 0; i < MAX_BLOCKS; ++i) {
heap_get_bestfit_block(pop, b_def, &blocks[i]);
UT_ASSERT(blocks[i].block_off == 0);
}
struct memory_block *blocksp[MAX_BLOCKS] = {NULL};
struct memory_block prev;
heap_get_adjacent_free_block(pop, b_def, &prev, blocks[1], 1);
UT_ASSERT(prev.chunk_id == blocks[0].chunk_id);
blocksp[0] = &prev;
struct memory_block cnt;
heap_get_adjacent_free_block(pop, b_def, &cnt, blocks[0], 0);
UT_ASSERT(cnt.chunk_id == blocks[1].chunk_id);
blocksp[1] = &cnt;
struct memory_block next;
heap_get_adjacent_free_block(pop, b_def, &next, blocks[1], 0);
UT_ASSERT(next.chunk_id == blocks[2].chunk_id);
blocksp[2] = &next;
struct operation_context *ctx = operation_init(pop, NULL);
struct memory_block result =
heap_coalesce(pop, blocksp, MAX_BLOCKS, HEAP_OP_FREE, ctx);
operation_process(ctx);
operation_delete(ctx);
UT_ASSERT(result.size_idx == 3);
UT_ASSERT(result.chunk_id == prev.chunk_id);
UT_ASSERT(heap_check(pop) == 0);
heap_cleanup(pop);
UT_ASSERT(pop->heap == NULL);
Free(mpop);
}
