/*
* huge_reinit_chunk -- chunk reinitialization on first zone traversal
*/
static void
huge_reinit_chunk(const struct memory_block *m)
{
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
if (hdr->type == CHUNK_TYPE_USED)
huge_write_footer(hdr, hdr->size_idx);
}
/*
* huge_vg_init -- initalizes chunk metadata in memcheck state
*/
static void
huge_vg_init(const struct memory_block *m, int objects,
object_callback cb, void *arg)
{
struct zone *z = ZID_TO_ZONE(m->heap->layout, m->zone_id);
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
struct chunk *chunk = heap_get_chunk(m->heap, m);
VALGRIND_DO_MAKE_MEM_DEFINED(hdr, sizeof(*hdr));
/*
* Mark unused chunk headers as not accessible.
*/
VALGRIND_DO_MAKE_MEM_NOACCESS(
&z->chunk_headers[m->chunk_id + 1],
(m->size_idx - 1) *
sizeof(struct chunk_header));
size_t size = block_get_real_size(m);
VALGRIND_DO_MAKE_MEM_NOACCESS(chunk, size);
if (objects && huge_get_state(m) == MEMBLOCK_ALLOCATED) {
if (cb(m, arg) != 0)
FATAL("failed to initialize valgrind state");
}
}
/*
* huge_iterate_free -- calls cb on memory block if it's used
*/
static int
huge_iterate_used(const struct memory_block *m, object_callback cb, void *arg)
{
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
return hdr->type == CHUNK_TYPE_USED ? cb(m, arg) : 0;
}
/*
* huge_prep_operation_hdr -- prepares the new value of a chunk header that will
* be set after the operation concludes.
*/
static void
huge_prep_operation_hdr(const struct memory_block *m, enum memblock_state op,
struct operation_context *ctx)
{
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
/*
* Depending on the operation that needs to be performed a new chunk
* header needs to be prepared with the new chunk state.
*/
uint64_t val = chunk_get_chunk_hdr_value(
op == MEMBLOCK_ALLOCATED ? CHUNK_TYPE_USED : CHUNK_TYPE_FREE,
hdr->flags,
m->size_idx);
if (ctx == NULL) {
util_atomic_store_explicit64((uint64_t *)hdr, val,
memory_order_relaxed);
pmemops_persist(&m->heap->p_ops, hdr, sizeof(*hdr));
} else {
operation_add_entry(ctx, hdr, val, ULOG_OPERATION_SET);
}
VALGRIND_DO_MAKE_MEM_NOACCESS(hdr + 1,
(hdr->size_idx - 1) * sizeof(struct chunk_header));
/*
* In the case of chunks larger than one unit the footer must be
* created immediately AFTER the persistent state is safely updated.
*/
if (m->size_idx == 1)
return;
struct chunk_header *footer = hdr + m->size_idx - 1;
VALGRIND_DO_MAKE_MEM_UNDEFINED(footer, sizeof(*footer));
val = chunk_get_chunk_hdr_value(CHUNK_TYPE_FOOTER, 0, m->size_idx);
/*
* It's only safe to write the footer AFTER the persistent part of
* the operation have been successfully processed because the footer
* pointer might point to a currently valid persistent state
* of a different chunk.
* The footer entry change is updated as transient because it will
* be recreated at heap boot regardless - it's just needed for runtime
* operations.
*/
if (ctx == NULL) {
util_atomic_store_explicit64((uint64_t *)footer, val,
memory_order_relaxed);
VALGRIND_SET_CLEAN(footer, sizeof(*footer));
} else {
operation_add_typed_entry(ctx,
footer, val, ULOG_OPERATION_SET, LOG_TRANSIENT);
}
}
/*
* run_ensure_header_type -- runs must be created with appropriate header type.
*/
static void
run_ensure_header_type(const struct memory_block *m,
enum header_type t)
{
#ifdef DEBUG
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
ASSERTeq(hdr->type, CHUNK_TYPE_RUN);
ASSERT((hdr->flags & header_type_to_flag[t]) == header_type_to_flag[t]);
#endif
}
/*
* run_get_real_data -- returns pointer to the beginning data of a run block
*/
static void *
run_get_real_data(const struct memory_block *m)
{
struct chunk_run *run = heap_get_chunk_run(m->heap, m);
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
ASSERT(run->block_size != 0);
return run_get_data_start(hdr, run, m->header_type) +
(run->block_size * m->block_off);
}
/*
* run_get_bitmap -- initializes run bitmap information
*/
static void
run_get_bitmap(const struct memory_block *m, struct run_bitmap *b)
{
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
struct chunk_run *run = heap_get_chunk_run(m->heap, m);
uint32_t size_idx = hdr->size_idx;
memblock_run_bitmap(&size_idx, hdr->flags, run->hdr.block_size,
run->hdr.alignment, run->content, b);
ASSERTeq(size_idx, hdr->size_idx);
}
/*
* huge_get_state -- returns whether a huge block is allocated or not
*/
static enum memblock_state
huge_get_state(const struct memory_block *m)
{
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
if (hdr->type == CHUNK_TYPE_USED)
return MEMBLOCK_ALLOCATED;
if (hdr->type == CHUNK_TYPE_FREE)
return MEMBLOCK_FREE;
return MEMBLOCK_STATE_UNKNOWN;
}
/*
* memblock_header_type -- determines the memory block's header type
*/
static enum header_type
memblock_header_type(const struct memory_block *m)
{
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
if (hdr->flags & CHUNK_FLAG_COMPACT_HEADER)
return HEADER_COMPACT;
if (hdr->flags & CHUNK_FLAG_HEADER_NONE)
return HEADER_NONE;
return HEADER_LEGACY;
}
/*
* huge_ensure_header_type -- checks the header type of a chunk and modifies
* it if necessary. This is fail-safe atomic.
*/
static void
huge_ensure_header_type(const struct memory_block *m,
enum header_type t)
{
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
ASSERTeq(hdr->type, CHUNK_TYPE_FREE);
if ((hdr->flags & header_type_to_flag[t]) == 0) {
VALGRIND_ADD_TO_TX(hdr, sizeof(*hdr));
uint16_t f = ((uint16_t)header_type_to_flag[t]);
hdr->flags |= f;
pmemops_persist(&m->heap->p_ops, hdr, sizeof(*hdr));
VALGRIND_REMOVE_FROM_TX(hdr, sizeof(*hdr));
}
}
/*
* memblock_from_offset -- resolves a memory block data from an offset that
* originates from the heap
*/
struct memory_block
memblock_from_offset_opt(struct palloc_heap *heap, uint64_t off, int size)
{
struct memory_block m = MEMORY_BLOCK_NONE;
m.heap = heap;
off -= HEAP_PTR_TO_OFF(heap, &heap->layout->zone0);
m.zone_id = (uint32_t)(off / ZONE_MAX_SIZE);
off -= (ZONE_MAX_SIZE * m.zone_id) + sizeof(struct zone);
m.chunk_id = (uint32_t)(off / CHUNKSIZE);
struct chunk_header *hdr = heap_get_chunk_hdr(heap, &m);
if (hdr->type == CHUNK_TYPE_RUN_DATA)
m.chunk_id -= hdr->size_idx;
off -= CHUNKSIZE * m.chunk_id;
m.header_type = memblock_header_type(&m);
off -= header_type_to_size[m.header_type];
m.type = off != 0 ? MEMORY_BLOCK_RUN : MEMORY_BLOCK_HUGE;
ASSERTeq(memblock_detect_type(heap, &m), m.type);
m.m_ops = &mb_ops[m.type];
uint64_t unit_size = m.m_ops->block_size(&m);
if (off != 0) { /* run */
struct chunk_run *run = heap_get_chunk_run(heap, &m);
off -= run_get_alignment_padding(hdr, run, m.header_type);
off -= RUN_METASIZE;
m.block_off = (uint16_t)(off / unit_size);
off -= m.block_off * unit_size;
}
m.size_idx = !size ? 0 : CALC_SIZE_IDX(unit_size,
memblock_header_ops[m.header_type].get_size(&m));
ASSERTeq(off, 0);
return m;
}
/*
* memblock_detect_type -- looks for the corresponding chunk header and
* depending on the chunks type returns the right memory block type
*/
static enum memory_block_type
memblock_detect_type(struct palloc_heap *heap, const struct memory_block *m)
{
enum memory_block_type ret;
switch (heap_get_chunk_hdr(heap, m)->type) {
case CHUNK_TYPE_RUN:
case CHUNK_TYPE_RUN_DATA:
ret = MEMORY_BLOCK_RUN;
break;
case CHUNK_TYPE_FREE:
case CHUNK_TYPE_USED:
case CHUNK_TYPE_FOOTER:
ret = MEMORY_BLOCK_HUGE;
break;
default:
/* unreachable */
FATAL("possible zone chunks metadata corruption");
}
return ret;
}
/*
* run_get_data_start -- (internal) returns the pointer to the beginning of
* allocations in a run
*/
static char *
run_get_data_start(const struct memory_block *m)
{
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
struct chunk_run *run = heap_get_chunk_run(m->heap, m);
struct run_bitmap b;
run_get_bitmap(m, &b);
if (hdr->flags & CHUNK_FLAG_ALIGNED) {
/*
* Alignment is property of user data in allocations. And
* since objects have headers, we need to take them into
* account when calculating the address.
*/
uintptr_t hsize = header_type_to_size[m->header_type];
uintptr_t base = (uintptr_t)run->content +
b.size + hsize;
return (char *)(ALIGN_UP(base, run->hdr.alignment) - hsize);
} else {
return (char *)&run->content + b.size;
}
}
/*
* run_vg_init -- initalizes run metadata in memcheck state
*/
static void
run_vg_init(const struct memory_block *m, int objects,
object_callback cb, void *arg)
{
struct zone *z = ZID_TO_ZONE(m->heap->layout, m->zone_id);
struct chunk_header *hdr = heap_get_chunk_hdr(m->heap, m);
struct chunk_run *run = heap_get_chunk_run(m->heap, m);
VALGRIND_DO_MAKE_MEM_DEFINED(hdr, sizeof(*hdr));
/* set the run metadata as defined */
VALGRIND_DO_MAKE_MEM_DEFINED(run, RUN_BASE_METADATA_SIZE);
struct run_bitmap b;
run_get_bitmap(m, &b);
/*
* Mark run data headers as defined.
*/
for (unsigned j = 1; j < m->size_idx; ++j) {
struct chunk_header *data_hdr =
&z->chunk_headers[m->chunk_id + j];
VALGRIND_DO_MAKE_MEM_DEFINED(data_hdr,
sizeof(struct chunk_header));
ASSERTeq(data_hdr->type, CHUNK_TYPE_RUN_DATA);
}
VALGRIND_DO_MAKE_MEM_NOACCESS(run, SIZEOF_RUN(run, m->size_idx));
/* set the run bitmap as defined */
VALGRIND_DO_MAKE_MEM_DEFINED(run, b.size + RUN_BASE_METADATA_SIZE);
if (objects) {
if (run_iterate_used(m, cb, arg) != 0)
FATAL("failed to initialize valgrind state");
}
}
/*
* memblock_huge_init -- initializes a new huge memory block
*/
struct memory_block
memblock_huge_init(struct palloc_heap *heap,
uint32_t chunk_id, uint32_t zone_id, uint32_t size_idx)
{
struct memory_block m = MEMORY_BLOCK_NONE;
m.chunk_id = chunk_id;
m.zone_id = zone_id;
m.size_idx = size_idx;
m.heap = heap;
struct chunk_header nhdr = {
.type = CHUNK_TYPE_FREE,
.flags = 0,
.size_idx = size_idx
};
struct chunk_header *hdr = heap_get_chunk_hdr(heap, &m);
VALGRIND_DO_MAKE_MEM_UNDEFINED(hdr, sizeof(*hdr));
VALGRIND_ANNOTATE_NEW_MEMORY(hdr, sizeof(*hdr));
*hdr = nhdr; /* write the entire header (8 bytes) at once */
pmemops_persist(&heap->p_ops, hdr, sizeof(*hdr));
huge_write_footer(hdr, size_idx);
memblock_rebuild_state(heap, &m);
return m;
}
/*
* memblock_run_init -- initializes a new run memory block
*/
struct memory_block
memblock_run_init(struct palloc_heap *heap,
uint32_t chunk_id, uint32_t zone_id, uint32_t size_idx, uint16_t flags,
uint64_t unit_size, uint64_t alignment)
{
ASSERTne(size_idx, 0);
struct memory_block m = MEMORY_BLOCK_NONE;
m.chunk_id = chunk_id;
m.zone_id = zone_id;
m.size_idx = size_idx;
m.heap = heap;
struct zone *z = ZID_TO_ZONE(heap->layout, zone_id);
struct chunk_run *run = heap_get_chunk_run(heap, &m);
size_t runsize = SIZEOF_RUN(run, size_idx);
VALGRIND_DO_MAKE_MEM_UNDEFINED(run, runsize);
/* add/remove chunk_run and chunk_header to valgrind transaction */
VALGRIND_ADD_TO_TX(run, runsize);
run->hdr.block_size = unit_size;
run->hdr.alignment = alignment;
struct run_bitmap b;
memblock_run_bitmap(&size_idx, flags, unit_size, alignment,
run->content, &b);
size_t bitmap_size = b.size;
/* set all the bits */
memset(b.values, 0xFF, bitmap_size);
/* clear only the bits available for allocations from this bucket */
memset(b.values, 0, sizeof(*b.values) * (b.nvalues - 1));
unsigned trailing_bits = b.nbits % RUN_BITS_PER_VALUE;
uint64_t last_value = UINT64_MAX << trailing_bits;
b.values[b.nvalues - 1] = last_value;
VALGRIND_REMOVE_FROM_TX(run, runsize);
pmemops_flush(&heap->p_ops, run,
sizeof(struct chunk_run_header) +
bitmap_size);
struct chunk_header run_data_hdr;
run_data_hdr.type = CHUNK_TYPE_RUN_DATA;
run_data_hdr.flags = 0;
VALGRIND_ADD_TO_TX(&z->chunk_headers[chunk_id],
sizeof(struct chunk_header) * size_idx);
struct chunk_header *data_hdr;
for (unsigned i = 1; i < size_idx; ++i) {
data_hdr = &z->chunk_headers[chunk_id + i];
VALGRIND_DO_MAKE_MEM_UNDEFINED(data_hdr, sizeof(*data_hdr));
VALGRIND_ANNOTATE_NEW_MEMORY(data_hdr, sizeof(*data_hdr));
run_data_hdr.size_idx = i;
*data_hdr = run_data_hdr;
}
pmemops_persist(&heap->p_ops,
&z->chunk_headers[chunk_id + 1],
sizeof(struct chunk_header) * (size_idx - 1));
struct chunk_header *hdr = &z->chunk_headers[chunk_id];
ASSERT(hdr->type == CHUNK_TYPE_FREE);
VALGRIND_ANNOTATE_NEW_MEMORY(hdr, sizeof(*hdr));
struct chunk_header run_hdr;
run_hdr.size_idx = hdr->size_idx;
run_hdr.type = CHUNK_TYPE_RUN;
run_hdr.flags = flags;
*hdr = run_hdr;
pmemops_persist(&heap->p_ops, hdr, sizeof(*hdr));
VALGRIND_REMOVE_FROM_TX(&z->chunk_headers[chunk_id],
sizeof(struct chunk_header) * size_idx);
memblock_rebuild_state(heap, &m);
return m;
}