[bugfix] change block layout in page
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@ -192,20 +192,18 @@ heap_free(pic_state *pic, void *ap)
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bp = (union header *)ap - 1;
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assert(bp->s.size > 1);
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for (p = pic->heap->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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if (bp + bp->s.size == p->s.ptr && p->s.ptr->s.size > 0) { /* don't melt base header */
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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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} 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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if (p + p->s.size == bp) {
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p->s.size += bp->s.size;
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p->s.ptr = bp->s.ptr;
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} else {
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@ -221,21 +219,21 @@ heap_morecore(pic_state *pic)
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struct heap_page *page;
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size_t nu;
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nu = (PIC_HEAP_PAGE_SIZE + sizeof(union header) - 1) / sizeof(union header) + 1;
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nu = PIC_HEAP_PAGE_SIZE / sizeof(union header);
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up = pic_malloc(pic, (1 + nu + 1) * sizeof(union header));
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up->s.size = nu + 1;
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assert(nu >= 2);
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up = pic_malloc(pic, PIC_HEAP_PAGE_SIZE);
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up->s.size = 0; /* up is never used for allocation */
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heap_free(pic, up + 1);
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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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np->s.size = nu - 1;
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heap_free(pic, np + 1);
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page = pic_malloc(pic, sizeof(struct heap_page));
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page->basep = up;
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page->endp = up + nu + 1;
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page->endp = up + nu;
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page->next = pic->heap->pages;
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pic->heap->pages = page;
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@ -716,8 +714,9 @@ gc_sweep_page(pic_state *pic, struct heap_page *page)
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union header *bp, *p, *head = NULL, *tail = NULL;
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for (bp = page->basep; ; bp = bp->s.ptr) {
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for (p = bp + bp->s.size; p != bp->s.ptr; p += p->s.size) {
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if (p == page->endp) {
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p = bp + (bp->s.size ? bp->s.size : 1); /* first bp's size is 0, so force advnce */
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for (; p != bp->s.ptr; p += p->s.size) {
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if (p < page->basep || page->endp <= p) {
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goto escape;
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}
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if (gc_is_marked(p)) {
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