/*
* operation_add_entry -- adds new entry to the current operation with
* entry type autodetected based on the memory location
*/
void
operation_add_entry(struct operation_context *ctx, void *ptr, uint64_t value,
enum operation_type type)
{
operation_add_typed_entry(ctx, ptr, value, type,
OBJ_PTR_IS_VALID(ctx->pop, ptr) ?
ENTRY_PERSISTENT : ENTRY_TRANSIENT);
}
/*
* 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);
}
}
/*
* 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 zone *z = ZID_TO_ZONE(m->heap->layout, m->zone_id);
struct chunk_header *hdr = &z->chunk_headers[m->chunk_id];
/*
* 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);
operation_add_entry(ctx, hdr, val, 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.
*/
operation_add_typed_entry(ctx,
footer, val, OPERATION_SET, ENTRY_TRANSIENT);
}
