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Refactor mark-sweep to send mutator to collect()

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This will let the mutator hold a pointer to the heap.
This commit is contained in:
Andy Wingo 2022-03-29 08:34:19 +02:00
parent edd46d8fe2
commit 61d38e4205
1 changed files with 14 additions and 13 deletions
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27
mark-sweep.h
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@ -152,7 +152,7 @@ static inline void clear_memory(uintptr_t addr, size_t size) {
memset((char*)addr, 0, size); memset((char*)addr, 0, size);
} }
static void collect(struct context *cx) NEVER_INLINE; static void collect(struct mutator *mut) NEVER_INLINE;
static inline uint8_t* mark_byte(struct context *cx, struct gcobj *obj) { static inline uint8_t* mark_byte(struct context *cx, struct gcobj *obj) {
ASSERT(cx->heap_base <= (uintptr_t) obj); ASSERT(cx->heap_base <= (uintptr_t) obj);
@ -188,11 +188,10 @@ static void clear_freelists(struct context *cx) {
cx->large_objects = NULL; cx->large_objects = NULL;
} }
static void collect(struct context *cx) { static void collect(struct mutator *mut) {
struct context *cx = mutator_context(mut);
DEBUG("start collect #%ld:\n", cx->count); DEBUG("start collect #%ld:\n", cx->count);
marker_prepare(cx); marker_prepare(cx);
// HACK!!!
struct mutator *mut = (struct mutator *)cx;
for (struct handle *h = mut->roots; h; h = h->next) for (struct handle *h = mut->roots; h; h = h->next)
marker_visit_root(&h->v, cx); marker_visit_root(&h->v, cx);
marker_trace(cx); marker_trace(cx);
@ -341,8 +340,9 @@ static int sweep(struct context *cx, size_t for_granules) {
return 1; return 1;
} }
static void* allocate_large(struct context *cx, enum alloc_kind kind, static void* allocate_large(struct mutator *mut, enum alloc_kind kind,
size_t granules) { size_t granules) {
struct context *cx = mutator_context(mut);
int swept_from_beginning = 0; int swept_from_beginning = 0;
struct gcobj_free_large *already_scanned = NULL; struct gcobj_free_large *already_scanned = NULL;
while (1) { while (1) {
@ -367,13 +367,14 @@ static void* allocate_large(struct context *cx, enum alloc_kind kind,
fprintf(stderr, "ran out of space, heap size %zu\n", cx->heap_size); fprintf(stderr, "ran out of space, heap size %zu\n", cx->heap_size);
abort(); abort();
} else { } else {
collect(cx); collect(mut);
swept_from_beginning = 1; swept_from_beginning = 1;
} }
} }
} }
static void fill_small(struct context *cx, enum small_object_size kind) { static void fill_small(struct mutator *mut, enum small_object_size kind) {
struct context *cx = mutator_context(mut);
int swept_from_beginning = 0; int swept_from_beginning = 0;
while (1) { while (1) {
// First see if there are small objects already on the freelists // First see if there are small objects already on the freelists
@ -407,19 +408,20 @@ static void fill_small(struct context *cx, enum small_object_size kind) {
fprintf(stderr, "ran out of space, heap size %zu\n", cx->heap_size); fprintf(stderr, "ran out of space, heap size %zu\n", cx->heap_size);
abort(); abort();
} else { } else {
collect(cx); collect(mut);
swept_from_beginning = 1; swept_from_beginning = 1;
} }
} }
} }
} }
static inline void* allocate_small(struct context *cx, static inline void* allocate_small(struct mutator *mut,
enum alloc_kind alloc_kind, enum alloc_kind alloc_kind,
enum small_object_size small_kind) { enum small_object_size small_kind) {
struct context *cx = mutator_context(mut);
struct gcobj_free **loc = get_small_object_freelist(cx, small_kind); struct gcobj_free **loc = get_small_object_freelist(cx, small_kind);
if (!*loc) if (!*loc)
fill_small(cx, small_kind); fill_small(mut, small_kind);
struct gcobj_free *ret = *loc; struct gcobj_free *ret = *loc;
*loc = ret->next; *loc = ret->next;
struct gcobj *obj = (struct gcobj *)ret; struct gcobj *obj = (struct gcobj *)ret;
@ -429,11 +431,10 @@ static inline void* allocate_small(struct context *cx,
static inline void* allocate(struct mutator *mut, enum alloc_kind kind, static inline void* allocate(struct mutator *mut, enum alloc_kind kind,
size_t size) { size_t size) {
struct context *cx = mutator_context(mut);
size_t granules = size_to_granules(size); size_t granules = size_to_granules(size);
if (granules <= LARGE_OBJECT_GRANULE_THRESHOLD) if (granules <= LARGE_OBJECT_GRANULE_THRESHOLD)
return allocate_small(cx, kind, granules_to_small_object_size(granules)); return allocate_small(mut, kind, granules_to_small_object_size(granules));
return allocate_large(cx, kind, granules); return allocate_large(mut, kind, granules);
} }
static inline void* allocate_pointerless(struct mutator *mut, static inline void* allocate_pointerless(struct mutator *mut,
enum alloc_kind kind, enum alloc_kind kind,