2014-08-25 00:38:09 -04:00
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/**
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* See Copyright Notice in picrin.h
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*/
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#include "picrin.h"
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union header {
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struct {
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union header *ptr;
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size_t size;
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2015-05-27 09:49:29 -04:00
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char mark;
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2014-08-25 00:38:09 -04:00
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} s;
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2015-01-17 04:36:23 -05:00
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long alignment[2];
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2014-08-25 00:38:09 -04:00
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};
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struct heap_page {
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union header *basep, *endp;
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struct heap_page *next;
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};
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struct pic_heap {
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union header base, *freep;
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struct heap_page *pages;
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};
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static void
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heap_init(struct pic_heap *heap)
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{
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heap->base.s.ptr = &heap->base;
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heap->base.s.size = 0; /* not 1, since it must never be used for allocation */
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heap->base.s.mark = PIC_GC_UNMARK;
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heap->freep = &heap->base;
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heap->pages = NULL;
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#if GC_DEBUG
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printf("freep = %p\n", (void *)heap->freep);
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#endif
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}
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struct pic_heap *
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2015-01-22 03:08:41 -05:00
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pic_heap_open(pic_state *pic)
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2014-08-25 00:38:09 -04:00
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{
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struct pic_heap *heap;
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2015-01-22 03:08:41 -05:00
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heap = pic_calloc(pic, 1, sizeof(struct pic_heap));
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2014-08-25 00:38:09 -04:00
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heap_init(heap);
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return heap;
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}
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void
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2015-01-22 03:08:41 -05:00
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pic_heap_close(pic_state *pic, struct pic_heap *heap)
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2014-08-25 00:38:09 -04:00
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{
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struct heap_page *page;
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while (heap->pages) {
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page = heap->pages;
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heap->pages = heap->pages->next;
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2015-01-22 03:08:41 -05:00
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pic_free(pic, page);
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2014-08-25 00:38:09 -04:00
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}
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}
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static void gc_free(pic_state *, union header *);
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static void
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add_heap_page(pic_state *pic)
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{
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union header *up, *np;
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struct heap_page *page;
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size_t nu;
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#if GC_DEBUG
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puts("adding heap page!");
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#endif
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nu = (PIC_HEAP_PAGE_SIZE + sizeof(union header) - 1) / sizeof(union header) + 1;
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2015-05-27 09:49:29 -04:00
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up = pic_calloc(pic, 1 + nu + 1, sizeof(union header));
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2014-08-25 00:38:09 -04:00
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up->s.size = nu + 1;
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up->s.mark = PIC_GC_UNMARK;
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gc_free(pic, up);
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np = up + 1;
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np->s.size = nu;
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np->s.ptr = up->s.ptr;
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up->s.size = 1;
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up->s.ptr = np;
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2015-05-28 03:42:16 -04:00
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page = pic_malloc(pic, sizeof(struct heap_page));
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2014-08-25 00:38:09 -04:00
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page->basep = up;
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page->endp = up + nu + 1;
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page->next = pic->heap->pages;
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pic->heap->pages = page;
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}
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2015-05-27 13:12:26 -04:00
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#if PIC_ENABLE_LIBC
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void *
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pic_default_allocf(void *ptr, size_t size)
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2014-08-25 00:38:09 -04:00
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{
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if (size == 0) {
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if (ptr) {
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free(ptr);
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}
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return NULL;
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}
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if (ptr) {
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return realloc(ptr, size);
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} else {
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return malloc(size);
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}
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}
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2015-05-27 13:12:26 -04:00
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#endif
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2014-08-25 00:38:09 -04:00
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void *
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2015-05-28 03:42:16 -04:00
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pic_malloc(pic_state *pic, size_t size)
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2014-08-25 00:38:09 -04:00
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{
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void *ptr;
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2015-05-27 13:12:26 -04:00
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ptr = pic->allocf(NULL, size);
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2014-08-25 00:38:09 -04:00
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if (ptr == NULL && size > 0) {
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2014-09-16 12:02:27 -04:00
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pic_panic(pic, "memory exhausted");
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2014-08-25 00:38:09 -04:00
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}
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return ptr;
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}
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void *
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pic_realloc(pic_state *pic, void *ptr, size_t size)
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{
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2015-05-27 13:12:26 -04:00
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ptr = pic->allocf(ptr, size);
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2014-08-25 00:38:09 -04:00
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if (ptr == NULL && size > 0) {
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2014-09-16 12:02:27 -04:00
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pic_panic(pic, "memory exhausted");
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2014-08-25 00:38:09 -04:00
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}
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return ptr;
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}
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void *
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pic_calloc(pic_state *pic, size_t count, size_t size)
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{
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void *ptr;
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size *= count;
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2015-05-27 13:12:26 -04:00
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ptr = pic->allocf(NULL, size);
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2014-08-25 00:38:09 -04:00
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if (ptr == NULL && size > 0) {
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2014-09-16 12:02:27 -04:00
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pic_panic(pic, "memory exhausted");
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2014-08-25 00:38:09 -04:00
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}
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memset(ptr, 0, size);
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return ptr;
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}
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void
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pic_free(pic_state *pic, void *ptr)
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{
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2015-05-27 13:12:26 -04:00
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pic->allocf(ptr, 0);
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2014-08-25 00:38:09 -04:00
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}
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static void
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gc_protect(pic_state *pic, struct pic_object *obj)
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{
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if (pic->arena_idx >= pic->arena_size) {
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pic->arena_size = pic->arena_size * 2 + 1;
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pic->arena = pic_realloc(pic, pic->arena, sizeof(struct pic_object *) * pic->arena_size);
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}
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pic->arena[pic->arena_idx++] = obj;
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}
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pic_value
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pic_gc_protect(pic_state *pic, pic_value v)
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{
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struct pic_object *obj;
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if (pic_vtype(v) != PIC_VTYPE_HEAP) {
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return v;
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}
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obj = pic_obj_ptr(v);
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gc_protect(pic, obj);
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return v;
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}
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size_t
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pic_gc_arena_preserve(pic_state *pic)
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{
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return pic->arena_idx;
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}
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void
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pic_gc_arena_restore(pic_state *pic, size_t state)
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{
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pic->arena_idx = state;
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}
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static void *
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gc_alloc(pic_state *pic, size_t size)
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{
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union header *freep, *p, *prevp;
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size_t nunits;
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#if GC_DEBUG
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assert(size > 0);
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#endif
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nunits = (size + sizeof(union header) - 1) / sizeof(union header) + 1;
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prevp = freep = pic->heap->freep;
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for (p = prevp->s.ptr; ; prevp = p, p = p->s.ptr) {
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if (p->s.size >= nunits)
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break;
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if (p == freep) {
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return NULL;
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}
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}
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#if GC_DEBUG
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{
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unsigned char *c;
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size_t s, i, j;
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if (p->s.size == nunits) {
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c = (unsigned char *)(p + p->s.size - nunits + 1);
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s = nunits - 1;
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} else {
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c = (unsigned char *)(p + p->s.size - nunits);
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s = nunits;
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}
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for (i = 0; i < s; ++i) {
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for (j = 0; j < sizeof(union header); ++j) {
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assert(c[i * sizeof(union header) + j] == 0xAA);
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}
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}
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}
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#endif
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if (p->s.size == nunits) {
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prevp->s.ptr = p->s.ptr;
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}
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else {
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p->s.size -= nunits;
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p += p->s.size;
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p->s.size = nunits;
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}
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pic->heap->freep = prevp;
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p->s.mark = PIC_GC_UNMARK;
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#if GC_DEBUG
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memset(p+1, 0, sizeof(union header) * (nunits - 1));
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p->s.ptr = (union header *)0xcafebabe;
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#endif
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return (void *)(p + 1);
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}
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static void
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gc_free(pic_state *pic, union header *bp)
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{
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union header *freep, *p;
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#if GC_DEBUG
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assert(bp != NULL);
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assert(bp->s.size > 1);
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#endif
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#if GC_DEBUG
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memset(bp + 1, 0xAA, (bp->s.size - 1) * sizeof(union header));
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#endif
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freep = pic->heap->freep;
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for (p = freep; ! (bp > p && bp < p->s.ptr); p = p->s.ptr) {
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if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
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break;
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}
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}
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if (bp + bp->s.size == p->s.ptr) {
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bp->s.size += p->s.ptr->s.size;
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bp->s.ptr = p->s.ptr->s.ptr;
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#if GC_DEBUG
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memset(p->s.ptr, 0xAA, sizeof(union header));
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#endif
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}
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else {
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bp->s.ptr = p->s.ptr;
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}
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if (p + p->s.size == bp && p->s.size > 1) {
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p->s.size += bp->s.size;
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p->s.ptr = bp->s.ptr;
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#if GC_DEBUG
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memset(bp, 0xAA, sizeof(union header));
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#endif
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}
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else {
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p->s.ptr = bp;
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}
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pic->heap->freep = p;
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}
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static void gc_mark(pic_state *, pic_value);
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static void gc_mark_object(pic_state *pic, struct pic_object *obj);
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static bool
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gc_is_marked(union header *p)
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{
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return p->s.mark == PIC_GC_MARK;
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}
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2014-09-24 23:12:52 -04:00
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static bool
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gc_obj_is_marked(struct pic_object *obj)
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{
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union header *p;
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p = ((union header *)obj) - 1;
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return gc_is_marked(p);
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}
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2015-06-09 05:31:46 -04:00
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static bool
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gc_value_need_mark(pic_value value)
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{
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return pic_obj_p(value) && (! gc_obj_is_marked(pic_obj_ptr(value)));
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}
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2014-08-25 00:38:09 -04:00
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static void
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gc_unmark(union header *p)
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{
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p->s.mark = PIC_GC_UNMARK;
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}
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static void
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gc_mark_object(pic_state *pic, struct pic_object *obj)
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{
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union header *p;
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p = ((union header *)obj) - 1;
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if (gc_is_marked(p))
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return;
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p->s.mark = PIC_GC_MARK;
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switch (obj->tt) {
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case PIC_TT_PAIR: {
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gc_mark(pic, ((struct pic_pair *)obj)->car);
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gc_mark(pic, ((struct pic_pair *)obj)->cdr);
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break;
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}
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2015-05-30 09:34:51 -04:00
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case PIC_TT_CXT: {
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struct pic_context *cxt = (struct pic_context *)obj;
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2014-08-25 00:38:09 -04:00
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int i;
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2015-05-30 09:34:51 -04:00
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for (i = 0; i < cxt->regc; ++i) {
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gc_mark(pic, cxt->regs[i]);
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2014-08-25 00:38:09 -04:00
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}
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2015-05-30 09:34:51 -04:00
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if (cxt->up) {
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gc_mark_object(pic, (struct pic_object *)cxt->up);
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2014-08-25 00:38:09 -04:00
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}
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break;
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}
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case PIC_TT_PROC: {
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struct pic_proc *proc = (struct pic_proc *)obj;
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if (pic_proc_irep_p(proc)) {
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2015-05-31 07:19:07 -04:00
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gc_mark_object(pic, (struct pic_object *)proc->u.i.irep);
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if (proc->u.i.cxt) {
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gc_mark_object(pic, (struct pic_object *)proc->u.i.cxt);
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}
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2015-01-18 22:14:46 -05:00
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} else {
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2015-05-31 07:22:46 -04:00
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gc_mark_object(pic, (struct pic_object *)proc->u.f.name);
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2015-05-31 07:46:44 -04:00
|
|
|
if (proc->u.f.env) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)proc->u.f.env);
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_PORT: {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_ERROR: {
|
|
|
|
struct pic_error *err = (struct pic_error *)obj;
|
2015-01-18 22:14:46 -05:00
|
|
|
gc_mark_object(pic, (struct pic_object *)err->type);
|
|
|
|
gc_mark_object(pic, (struct pic_object *)err->msg);
|
2014-08-25 00:38:09 -04:00
|
|
|
gc_mark(pic, err->irrs);
|
|
|
|
gc_mark_object(pic, (struct pic_object *)err->stack);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_STRING: {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_VECTOR: {
|
|
|
|
size_t i;
|
|
|
|
for (i = 0; i < ((struct pic_vector *)obj)->len; ++i) {
|
|
|
|
gc_mark(pic, ((struct pic_vector *)obj)->data[i]);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_BLOB: {
|
|
|
|
break;
|
|
|
|
}
|
2015-06-09 13:16:38 -04:00
|
|
|
case PIC_TT_ID: {
|
|
|
|
struct pic_id *id = (struct pic_id *)obj;
|
|
|
|
gc_mark(pic, id->var);
|
|
|
|
gc_mark_object(pic, (struct pic_object *)id->env);
|
|
|
|
break;
|
|
|
|
}
|
2015-05-30 09:39:03 -04:00
|
|
|
case PIC_TT_ENV: {
|
|
|
|
struct pic_env *env = (struct pic_env *)obj;
|
2015-06-09 13:16:38 -04:00
|
|
|
xh_entry *it;
|
2014-08-25 00:38:09 -04:00
|
|
|
|
2015-05-30 09:39:03 -04:00
|
|
|
if (env->up) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)env->up);
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
2015-06-09 13:16:38 -04:00
|
|
|
for (it = xh_begin(&env->map); it != NULL; it = xh_next(it)) {
|
|
|
|
gc_mark_object(pic, xh_key(it, struct pic_object *));
|
|
|
|
gc_mark_object(pic, xh_val(it, struct pic_object *));
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_LIB: {
|
|
|
|
struct pic_lib *lib = (struct pic_lib *)obj;
|
|
|
|
gc_mark(pic, lib->name);
|
|
|
|
gc_mark_object(pic, (struct pic_object *)lib->env);
|
2015-01-18 07:32:16 -05:00
|
|
|
gc_mark_object(pic, (struct pic_object *)lib->exports);
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_IREP: {
|
|
|
|
struct pic_irep *irep = (struct pic_irep *)obj;
|
|
|
|
size_t i;
|
|
|
|
|
2015-01-19 12:51:51 -05:00
|
|
|
gc_mark_object(pic, (struct pic_object *)irep->name);
|
|
|
|
|
2014-08-25 00:38:09 -04:00
|
|
|
for (i = 0; i < irep->ilen; ++i) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)irep->irep[i]);
|
|
|
|
}
|
|
|
|
for (i = 0; i < irep->plen; ++i) {
|
|
|
|
gc_mark(pic, irep->pool[i]);
|
|
|
|
}
|
2015-01-18 22:14:46 -05:00
|
|
|
for (i = 0; i < irep->slen; ++i) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)irep->syms[i]);
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_DATA: {
|
|
|
|
struct pic_data *data = (struct pic_data *)obj;
|
|
|
|
|
2015-06-23 12:13:18 -04:00
|
|
|
gc_mark_object(pic, (struct pic_object *)data->storage);
|
2014-09-16 03:18:19 -04:00
|
|
|
if (data->type->mark) {
|
|
|
|
data->type->mark(pic, data->data, gc_mark);
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_DICT: {
|
|
|
|
struct pic_dict *dict = (struct pic_dict *)obj;
|
2015-06-23 12:13:18 -04:00
|
|
|
pic_sym *sym;
|
2015-06-24 16:56:15 -04:00
|
|
|
khiter_t it;
|
2014-08-25 00:38:09 -04:00
|
|
|
|
2015-06-23 12:13:18 -04:00
|
|
|
pic_dict_for_each (sym, dict, it) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)sym);
|
|
|
|
gc_mark(pic, pic_dict_ref(pic, dict, sym));
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_RECORD: {
|
|
|
|
struct pic_record *rec = (struct pic_record *)obj;
|
|
|
|
|
2015-01-18 07:40:14 -05:00
|
|
|
gc_mark_object(pic, (struct pic_object *)rec->data);
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
2015-01-18 20:59:35 -05:00
|
|
|
case PIC_TT_SYMBOL: {
|
|
|
|
struct pic_symbol *sym = (struct pic_symbol *)obj;
|
|
|
|
|
|
|
|
gc_mark_object(pic, (struct pic_object *)sym->str);
|
|
|
|
break;
|
|
|
|
}
|
2015-06-09 05:31:46 -04:00
|
|
|
case PIC_TT_REG: {
|
|
|
|
struct pic_reg *reg = (struct pic_reg *)obj;
|
|
|
|
|
|
|
|
reg->prev = pic->regs;
|
|
|
|
pic->regs = reg;
|
|
|
|
break;
|
|
|
|
}
|
2015-06-22 04:06:13 -04:00
|
|
|
case PIC_TT_CP: {
|
|
|
|
struct pic_checkpoint *cp = (struct pic_checkpoint *)obj;
|
|
|
|
|
|
|
|
if (cp->prev) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)cp->prev);
|
|
|
|
}
|
|
|
|
if (cp->in) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)cp->in);
|
|
|
|
}
|
|
|
|
if (cp->out) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)cp->out);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
case PIC_TT_NIL:
|
|
|
|
case PIC_TT_BOOL:
|
2015-05-27 12:48:38 -04:00
|
|
|
#if PIC_ENABLE_FLOAT
|
2014-08-25 00:38:09 -04:00
|
|
|
case PIC_TT_FLOAT:
|
2015-05-27 12:48:38 -04:00
|
|
|
#endif
|
2014-08-25 00:38:09 -04:00
|
|
|
case PIC_TT_INT:
|
|
|
|
case PIC_TT_CHAR:
|
|
|
|
case PIC_TT_EOF:
|
|
|
|
case PIC_TT_UNDEF:
|
2015-06-09 03:02:23 -04:00
|
|
|
case PIC_TT_INVALID:
|
2014-09-16 12:02:27 -04:00
|
|
|
pic_panic(pic, "logic flaw");
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
gc_mark(pic_state *pic, pic_value v)
|
|
|
|
{
|
|
|
|
struct pic_object *obj;
|
|
|
|
|
|
|
|
if (pic_vtype(v) != PIC_VTYPE_HEAP)
|
|
|
|
return;
|
|
|
|
obj = pic_obj_ptr(v);
|
|
|
|
|
|
|
|
gc_mark_object(pic, obj);
|
|
|
|
}
|
|
|
|
|
2015-01-18 22:14:46 -05:00
|
|
|
#define M(x) gc_mark_object(pic, (struct pic_object *)pic->x)
|
|
|
|
|
|
|
|
static void
|
|
|
|
gc_mark_global_symbols(pic_state *pic)
|
|
|
|
{
|
2015-01-20 03:38:34 -05:00
|
|
|
M(sDEFINE); M(sLAMBDA); M(sIF); M(sBEGIN); M(sQUOTE); M(sSETBANG);
|
|
|
|
M(sQUASIQUOTE); M(sUNQUOTE); M(sUNQUOTE_SPLICING);
|
2015-06-10 02:18:03 -04:00
|
|
|
M(sSYNTAX_QUOTE); M(sSYNTAX_QUASIQUOTE); M(sSYNTAX_UNQUOTE);
|
|
|
|
M(sSYNTAX_UNQUOTE_SPLICING);
|
2015-06-09 13:16:38 -04:00
|
|
|
M(sDEFINE_MACRO); M(sIMPORT); M(sEXPORT);
|
2015-06-09 09:58:11 -04:00
|
|
|
M(sDEFINE_LIBRARY);
|
2015-01-20 03:38:34 -05:00
|
|
|
M(sCOND_EXPAND); M(sAND); M(sOR); M(sELSE); M(sLIBRARY);
|
|
|
|
M(sONLY); M(sRENAME); M(sPREFIX); M(sEXCEPT);
|
|
|
|
M(sCONS); M(sCAR); M(sCDR); M(sNILP);
|
|
|
|
M(sSYMBOLP); M(sPAIRP);
|
|
|
|
M(sADD); M(sSUB); M(sMUL); M(sDIV); M(sMINUS);
|
|
|
|
M(sEQ); M(sLT); M(sLE); M(sGT); M(sGE); M(sNOT);
|
|
|
|
M(sREAD); M(sFILE);
|
|
|
|
M(sCALL); M(sTAILCALL); M(sCALL_WITH_VALUES); M(sTAILCALL_WITH_VALUES);
|
|
|
|
M(sGREF); M(sLREF); M(sCREF); M(sRETURN);
|
|
|
|
|
2015-06-09 12:06:56 -04:00
|
|
|
M(uDEFINE); M(uLAMBDA); M(uIF); M(uBEGIN); M(uQUOTE); M(uSETBANG);
|
2015-06-09 13:16:38 -04:00
|
|
|
M(uDEFINE_MACRO); M(uIMPORT); M(uEXPORT);
|
2015-06-09 12:06:56 -04:00
|
|
|
M(uDEFINE_LIBRARY);
|
|
|
|
M(uCOND_EXPAND);
|
|
|
|
M(uCONS); M(uCAR); M(uCDR); M(uNILP);
|
|
|
|
M(uSYMBOLP); M(uPAIRP);
|
|
|
|
M(uADD); M(uSUB); M(uMUL); M(uDIV);
|
|
|
|
M(uEQ); M(uLT); M(uLE); M(uGT); M(uGE); M(uNOT);
|
|
|
|
M(uVALUES); M(uCALL_WITH_VALUES);
|
2015-01-18 22:14:46 -05:00
|
|
|
}
|
|
|
|
|
2014-08-25 00:38:09 -04:00
|
|
|
static void
|
|
|
|
gc_mark_phase(pic_state *pic)
|
|
|
|
{
|
|
|
|
pic_value *stack;
|
|
|
|
pic_callinfo *ci;
|
2014-09-18 01:50:01 -04:00
|
|
|
struct pic_proc **xhandler;
|
|
|
|
size_t j;
|
2015-06-09 05:31:46 -04:00
|
|
|
|
|
|
|
assert(pic->regs == NULL);
|
2014-08-25 00:38:09 -04:00
|
|
|
|
2015-06-08 08:04:04 -04:00
|
|
|
/* checkpoint */
|
|
|
|
if (pic->cp) {
|
2015-06-22 04:06:13 -04:00
|
|
|
gc_mark_object(pic, (struct pic_object *)pic->cp);
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* stack */
|
|
|
|
for (stack = pic->stbase; stack != pic->sp; ++stack) {
|
|
|
|
gc_mark(pic, *stack);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* callinfo */
|
|
|
|
for (ci = pic->ci; ci != pic->cibase; --ci) {
|
2015-05-30 09:34:51 -04:00
|
|
|
if (ci->cxt) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)ci->cxt);
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-09-18 01:50:01 -04:00
|
|
|
/* exception handlers */
|
|
|
|
for (xhandler = pic->xpbase; xhandler != pic->xp; ++xhandler) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)*xhandler);
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
|
|
|
|
/* arena */
|
|
|
|
for (j = 0; j < pic->arena_idx; ++j) {
|
|
|
|
gc_mark_object(pic, pic->arena[j]);
|
|
|
|
}
|
|
|
|
|
2015-01-20 03:38:34 -05:00
|
|
|
/* mark reserved symbols */
|
2015-01-18 22:14:46 -05:00
|
|
|
gc_mark_global_symbols(pic);
|
|
|
|
|
2014-08-25 00:38:09 -04:00
|
|
|
/* global variables */
|
2015-01-18 07:25:34 -05:00
|
|
|
if (pic->globals) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)pic->globals);
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* macro objects */
|
2015-01-18 07:25:34 -05:00
|
|
|
if (pic->macros) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)pic->macros);
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
|
2015-06-09 05:31:46 -04:00
|
|
|
/* attribute table */
|
|
|
|
if (pic->attrs) {
|
|
|
|
gc_mark_object(pic, (struct pic_object *)pic->attrs);
|
|
|
|
}
|
|
|
|
|
2014-09-18 01:50:01 -04:00
|
|
|
/* error object */
|
|
|
|
gc_mark(pic, pic->err);
|
2014-08-25 00:38:09 -04:00
|
|
|
|
2014-09-18 01:50:01 -04:00
|
|
|
/* features */
|
2014-09-09 12:41:10 -04:00
|
|
|
gc_mark(pic, pic->features);
|
|
|
|
|
2014-08-25 00:38:09 -04:00
|
|
|
/* library table */
|
|
|
|
gc_mark(pic, pic->libs);
|
2014-09-01 00:43:54 -04:00
|
|
|
|
2015-06-08 09:28:17 -04:00
|
|
|
/* parameter table */
|
|
|
|
gc_mark(pic, pic->ptable);
|
|
|
|
|
2015-06-09 05:31:46 -04:00
|
|
|
/* registries */
|
2014-09-24 23:12:52 -04:00
|
|
|
do {
|
2015-06-09 05:31:46 -04:00
|
|
|
struct pic_object *key;
|
|
|
|
pic_value val;
|
|
|
|
xh_entry *it;
|
|
|
|
struct pic_reg *reg;
|
2014-09-24 23:12:52 -04:00
|
|
|
|
2015-06-09 05:31:46 -04:00
|
|
|
j = 0;
|
|
|
|
reg = pic->regs;
|
|
|
|
|
|
|
|
while (reg != NULL) {
|
|
|
|
for (it = xh_begin(®->hash); it != NULL; it = xh_next(it)) {
|
|
|
|
key = xh_key(it, struct pic_object *);
|
|
|
|
val = xh_val(it, pic_value);
|
|
|
|
if (gc_obj_is_marked(key) && gc_value_need_mark(val)) {
|
|
|
|
gc_mark(pic, val);
|
2014-09-24 23:12:52 -04:00
|
|
|
++j;
|
|
|
|
}
|
|
|
|
}
|
2015-06-09 05:31:46 -04:00
|
|
|
reg = reg->prev;
|
2014-09-24 23:12:52 -04:00
|
|
|
}
|
|
|
|
} while (j > 0);
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
gc_finalize_object(pic_state *pic, struct pic_object *obj)
|
|
|
|
{
|
|
|
|
#if GC_DEBUG
|
|
|
|
printf("* finalizing object: %s", pic_type_repr(pic_type(pic_obj_value(obj))));
|
|
|
|
// pic_debug(pic, pic_obj_value(obj));
|
|
|
|
puts("");
|
|
|
|
#endif
|
|
|
|
|
|
|
|
switch (obj->tt) {
|
|
|
|
case PIC_TT_PAIR: {
|
|
|
|
break;
|
|
|
|
}
|
2015-05-30 09:34:51 -04:00
|
|
|
case PIC_TT_CXT: {
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_PROC: {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_VECTOR: {
|
|
|
|
pic_free(pic, ((struct pic_vector *)obj)->data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_BLOB: {
|
|
|
|
pic_free(pic, ((struct pic_blob *)obj)->data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_STRING: {
|
2015-05-27 10:34:40 -04:00
|
|
|
pic_rope_decref(pic, ((struct pic_string *)obj)->rope);
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_PORT: {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_ERROR: {
|
|
|
|
break;
|
|
|
|
}
|
2015-06-09 13:16:38 -04:00
|
|
|
case PIC_TT_ID: {
|
|
|
|
break;
|
|
|
|
}
|
2015-05-30 09:39:03 -04:00
|
|
|
case PIC_TT_ENV: {
|
2015-06-09 13:16:38 -04:00
|
|
|
struct pic_env *env = (struct pic_env *)obj;
|
|
|
|
xh_destroy(&env->map);
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_LIB: {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_IREP: {
|
|
|
|
struct pic_irep *irep = (struct pic_irep *)obj;
|
|
|
|
pic_free(pic, irep->code);
|
|
|
|
pic_free(pic, irep->irep);
|
|
|
|
pic_free(pic, irep->pool);
|
2015-01-18 11:29:00 -05:00
|
|
|
pic_free(pic, irep->syms);
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_DATA: {
|
|
|
|
struct pic_data *data = (struct pic_data *)obj;
|
2015-06-22 14:02:12 -04:00
|
|
|
if (data->type->dtor) {
|
|
|
|
data->type->dtor(pic, data->data);
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_DICT: {
|
|
|
|
struct pic_dict *dict = (struct pic_dict *)obj;
|
2015-06-24 16:56:15 -04:00
|
|
|
kh_destroy(dict, &dict->hash);
|
2014-08-25 00:38:09 -04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PIC_TT_RECORD: {
|
|
|
|
break;
|
|
|
|
}
|
2015-01-18 20:59:35 -05:00
|
|
|
case PIC_TT_SYMBOL: {
|
|
|
|
break;
|
|
|
|
}
|
2015-06-09 05:31:46 -04:00
|
|
|
case PIC_TT_REG: {
|
|
|
|
struct pic_reg *reg = (struct pic_reg *)obj;
|
|
|
|
xh_destroy(®->hash);
|
|
|
|
break;
|
|
|
|
}
|
2015-06-22 04:06:13 -04:00
|
|
|
case PIC_TT_CP: {
|
|
|
|
break;
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
case PIC_TT_NIL:
|
|
|
|
case PIC_TT_BOOL:
|
2015-05-27 12:48:38 -04:00
|
|
|
#if PIC_ENABLE_FLOAT
|
2014-08-25 00:38:09 -04:00
|
|
|
case PIC_TT_FLOAT:
|
2015-05-27 12:48:38 -04:00
|
|
|
#endif
|
2014-08-25 00:38:09 -04:00
|
|
|
case PIC_TT_INT:
|
|
|
|
case PIC_TT_CHAR:
|
|
|
|
case PIC_TT_EOF:
|
|
|
|
case PIC_TT_UNDEF:
|
2015-06-09 03:02:23 -04:00
|
|
|
case PIC_TT_INVALID:
|
2014-09-16 12:02:27 -04:00
|
|
|
pic_panic(pic, "logic flaw");
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-01-20 03:38:34 -05:00
|
|
|
static void
|
|
|
|
gc_sweep_symbols(pic_state *pic)
|
|
|
|
{
|
|
|
|
xh_entry *it;
|
|
|
|
char *cstr;
|
|
|
|
|
|
|
|
for (it = xh_begin(&pic->syms); it != NULL; it = xh_next(it)) {
|
|
|
|
if (! gc_obj_is_marked((struct pic_object *)xh_val(it, pic_sym *))) {
|
2015-06-23 09:08:18 -04:00
|
|
|
cstr = xh_key(it, char *);
|
2015-01-20 03:38:34 -05:00
|
|
|
|
2015-06-23 09:08:18 -04:00
|
|
|
xh_del_str(&pic->syms, cstr);
|
2015-01-20 03:38:34 -05:00
|
|
|
|
2015-06-23 09:08:18 -04:00
|
|
|
pic_free(pic, cstr);
|
|
|
|
}
|
2015-01-20 03:38:34 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-25 00:38:09 -04:00
|
|
|
static void
|
|
|
|
gc_sweep_page(pic_state *pic, struct heap_page *page)
|
|
|
|
{
|
|
|
|
#if GC_DEBUG
|
2015-06-09 06:19:27 -04:00
|
|
|
static union header * const NIL = (union header *)0xdeadbeef;
|
2014-08-25 00:38:09 -04:00
|
|
|
#else
|
2015-06-09 06:19:27 -04:00
|
|
|
static union header * const NIL = NULL;
|
2014-08-25 00:38:09 -04:00
|
|
|
#endif
|
2014-09-26 02:59:28 -04:00
|
|
|
union header *bp, *p, *s = NIL, *t = NIL;
|
2014-08-25 00:38:09 -04:00
|
|
|
|
|
|
|
#if GC_DEBUG
|
|
|
|
int c = 0;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
for (bp = page->basep; ; bp = bp->s.ptr) {
|
|
|
|
for (p = bp + bp->s.size; p != bp->s.ptr; p += p->s.size) {
|
|
|
|
if (p == page->endp) {
|
|
|
|
goto escape;
|
|
|
|
}
|
|
|
|
if (! gc_is_marked(p)) {
|
|
|
|
if (s == NIL) {
|
|
|
|
s = p;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
t->s.ptr = p;
|
|
|
|
}
|
|
|
|
t = p;
|
|
|
|
t->s.ptr = NIL; /* For dead objects we can safely reuse ptr field */
|
|
|
|
}
|
|
|
|
gc_unmark(p);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
escape:
|
|
|
|
|
|
|
|
/* free! */
|
|
|
|
while (s != NIL) {
|
|
|
|
t = s->s.ptr;
|
|
|
|
gc_finalize_object(pic, (struct pic_object *)(s + 1));
|
|
|
|
gc_free(pic, s);
|
|
|
|
s = t;
|
|
|
|
|
|
|
|
#if GC_DEBUG
|
|
|
|
c++;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
#if GC_DEBUG
|
|
|
|
printf("freed objects count: %d\n", c);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
gc_sweep_phase(pic_state *pic)
|
|
|
|
{
|
|
|
|
struct heap_page *page = pic->heap->pages;
|
2014-09-24 23:12:52 -04:00
|
|
|
xh_entry *it, *next;
|
|
|
|
|
2015-06-09 05:31:46 -04:00
|
|
|
/* registries */
|
|
|
|
while (pic->regs != NULL) {
|
|
|
|
for (it = xh_begin(&pic->regs->hash); it != NULL; it = next) {
|
2014-09-24 23:12:52 -04:00
|
|
|
next = xh_next(it);
|
|
|
|
if (! gc_obj_is_marked(xh_key(it, struct pic_object *))) {
|
2015-06-09 05:31:46 -04:00
|
|
|
xh_del_ptr(&pic->regs->hash, xh_key(it, struct pic_object *));
|
2014-09-24 23:12:52 -04:00
|
|
|
}
|
|
|
|
}
|
2015-06-09 05:31:46 -04:00
|
|
|
pic->regs = pic->regs->prev;
|
|
|
|
}
|
2014-08-25 00:38:09 -04:00
|
|
|
|
2015-01-20 03:38:34 -05:00
|
|
|
gc_sweep_symbols(pic);
|
|
|
|
|
2014-08-25 00:38:09 -04:00
|
|
|
while (page) {
|
|
|
|
gc_sweep_page(pic, page);
|
|
|
|
page = page->next;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
pic_gc_run(pic_state *pic)
|
|
|
|
{
|
|
|
|
#if GC_DEBUG
|
|
|
|
struct heap_page *page;
|
|
|
|
#endif
|
|
|
|
|
2015-01-18 22:14:29 -05:00
|
|
|
if (! pic->gc_enable) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2014-08-25 00:38:09 -04:00
|
|
|
#if DEBUG
|
|
|
|
puts("gc run!");
|
|
|
|
#endif
|
|
|
|
|
|
|
|
gc_mark_phase(pic);
|
|
|
|
gc_sweep_phase(pic);
|
|
|
|
|
|
|
|
#if GC_DEBUG
|
|
|
|
for (page = pic->heap->pages; page; page = page->next) {
|
|
|
|
union header *bp, *p;
|
|
|
|
unsigned char *c;
|
|
|
|
|
|
|
|
for (bp = page->basep; ; bp = bp->s.ptr) {
|
|
|
|
for (c = (unsigned char *)(bp+1); c != (unsigned char *)(bp + bp->s.size); ++c) {
|
|
|
|
assert(*c == 0xAA);
|
|
|
|
}
|
|
|
|
for (p = bp + bp->s.size; p != bp->s.ptr; p += p->s.size) {
|
|
|
|
if (p == page->endp) {
|
|
|
|
/* if (page->next) */
|
|
|
|
/* assert(bp->s.ptr == page->next->basep); */
|
|
|
|
/* else */
|
|
|
|
/* assert(bp->s.ptr == &pic->heap->base); */
|
|
|
|
goto escape;
|
|
|
|
}
|
|
|
|
assert(! gc_is_marked(p));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
escape:
|
|
|
|
((void)0);
|
|
|
|
}
|
|
|
|
|
|
|
|
puts("not error on heap found! gc successfully finished");
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
struct pic_object *
|
|
|
|
pic_obj_alloc_unsafe(pic_state *pic, size_t size, enum pic_tt tt)
|
|
|
|
{
|
|
|
|
struct pic_object *obj;
|
|
|
|
|
|
|
|
#if GC_DEBUG
|
|
|
|
printf("*allocating: %s\n", pic_type_repr(tt));
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#if GC_STRESS
|
|
|
|
pic_gc_run(pic);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
obj = (struct pic_object *)gc_alloc(pic, size);
|
|
|
|
if (obj == NULL) {
|
2015-01-18 22:14:46 -05:00
|
|
|
pic_gc_run(pic);
|
2014-08-25 00:38:09 -04:00
|
|
|
obj = (struct pic_object *)gc_alloc(pic, size);
|
|
|
|
if (obj == NULL) {
|
|
|
|
add_heap_page(pic);
|
|
|
|
obj = (struct pic_object *)gc_alloc(pic, size);
|
|
|
|
if (obj == NULL)
|
2014-09-16 12:02:27 -04:00
|
|
|
pic_panic(pic, "GC memory exhausted");
|
2014-08-25 00:38:09 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
obj->tt = tt;
|
|
|
|
|
|
|
|
return obj;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct pic_object *
|
|
|
|
pic_obj_alloc(pic_state *pic, size_t size, enum pic_tt tt)
|
|
|
|
{
|
|
|
|
struct pic_object *obj;
|
|
|
|
|
|
|
|
obj = pic_obj_alloc_unsafe(pic, size, tt);
|
|
|
|
|
|
|
|
gc_protect(pic, obj);
|
|
|
|
return obj;
|
|
|
|
}
|