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Adding GC.compact and compacting GC support.

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This commit adds the new method `GC.compact` and compacting GC support.
Please see this issue for caveats:

  https://bugs.ruby-lang.org/issues/15626

[Feature #15626]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
tenderlove 2019-04-09 20:32:04 +00:00
parent c09e35d7bb
commit 3ef4db15e9
27 changed files with 1677 additions and 131 deletions
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50
transient_heap.c
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@ -796,6 +796,56 @@ blocks_clear_marked_index(struct transient_heap_block* block)
}
}
static void
transient_heap_block_update_refs(struct transient_heap* theap, struct transient_heap_block* block)
{
int i=0, n=0;
while (i<block->info.index) {
void *ptr = &block->buff[i];
struct transient_alloc_header *header = ptr;
unpoison_memory_region(header, sizeof *header, false);
void *poisoned = __asan_region_is_poisoned(header->obj, SIZEOF_VALUE);
unpoison_object(header->obj, false);
header->obj = rb_gc_new_location(header->obj);
if (poisoned) {
poison_object(header->obj);
}
i += header->size;
poison_memory_region(header, sizeof *header);
n++;
}
}
static void
transient_heap_blocks_update_refs(struct transient_heap* theap, struct transient_heap_block *block, const char *type_str)
{
while (block) {
transient_heap_block_update_refs(theap, block);
block = block->info.next_block;
}
}
void
rb_transient_heap_update_references(void)
{
struct transient_heap* theap = transient_heap_get();
int i;
transient_heap_blocks_update_refs(theap, theap->using_blocks, "using_blocks");
transient_heap_blocks_update_refs(theap, theap->marked_blocks, "marked_blocks");
for (i=0; i<theap->promoted_objects_index; i++) {
VALUE obj = theap->promoted_objects[i];
theap->promoted_objects[i] == rb_gc_new_location(obj);
}
}
void
rb_transient_heap_start_marking(int full_marking)
{