- i = 0;
- for (chunk = pinned_chunk_list; chunk; chunk = chunk->block.next) {
- report_pinned_chunk (chunk, i++);
- }
-}
-
-/*
- * the array of pointers from @start to @end contains conservative
- * pointers to objects inside @chunk: mark each referenced object
- * with the PIN bit.
- */
-static void
-mark_pinned_from_addresses (PinnedChunk *chunk, void **start, void **end)
-{
- for (; start < end; start++) {
- char *addr = *start;
- int offset = (char*)addr - (char*)chunk;
- int page = offset / FREELIST_PAGESIZE;
- int obj_offset = page == 0? offset - ((char*)chunk->start_data - (char*)chunk): offset % FREELIST_PAGESIZE;
- int slot_size = chunk->page_sizes [page];
- void **ptr;
- /* the page is not allocated */
- if (!slot_size)
- continue;
- /* would be faster if we restrict the sizes to power of two,
- * but that's a waste of memory: need to measure. it could reduce
- * fragmentation since there are less pages needed, if for example
- * someone interns strings of each size we end up with one page per
- * interned string (still this is just ~40 KB): with more fine-grained sizes
- * this increases the number of used pages.
- */
- if (page == 0) {
- obj_offset /= slot_size;
- obj_offset *= slot_size;
- addr = (char*)chunk->start_data + obj_offset;
- } else {
- obj_offset /= slot_size;
- obj_offset *= slot_size;
- addr = (char*)chunk + page * FREELIST_PAGESIZE + obj_offset;
- }
- ptr = (void**)addr;
- /* if the vtable is inside the chunk it's on the freelist, so skip */
- if (*ptr && (*ptr < (void*)chunk->start_data || *ptr > (void*)((char*)chunk + chunk->num_pages * FREELIST_PAGESIZE))) {
- binary_protocol_pin (addr, (gpointer)LOAD_VTABLE (addr), safe_object_get_size ((MonoObject*)addr));
- if (heap_dump_file && !object_is_pinned (addr))
- pin_stats_register_object ((char*) addr, safe_object_get_size ((MonoObject*) addr));
- pin_object (addr);
- DEBUG (6, fprintf (gc_debug_file, "Marked pinned object %p (%s) from roots\n", addr, safe_name (addr)));
- }
- }
-}
-
-static void
-scan_pinned_objects (ScanPinnedObjectCallbackFunc callback, void *callback_data)
-{
- PinnedChunk *chunk;
- int i, obj_size;
- char *p, *endp;
- void **ptr;
- void *end_chunk;
- for (chunk = pinned_chunk_list; chunk; chunk = chunk->block.next) {
- end_chunk = (char*)chunk + chunk->num_pages * FREELIST_PAGESIZE;
- DEBUG (6, fprintf (gc_debug_file, "Scanning pinned chunk %p (range: %p-%p)\n", chunk, chunk->start_data, end_chunk));
- for (i = 0; i < chunk->num_pages; ++i) {
- obj_size = chunk->page_sizes [i];
- if (!obj_size)
- continue;
- p = i? (char*)chunk + i * FREELIST_PAGESIZE: chunk->start_data;
- endp = i? p + FREELIST_PAGESIZE: (char*)chunk + FREELIST_PAGESIZE;
- DEBUG (6, fprintf (gc_debug_file, "Page %d (size: %d, range: %p-%p)\n", i, obj_size, p, endp));
- while (p + obj_size <= endp) {
- ptr = (void**)p;
- DEBUG (9, fprintf (gc_debug_file, "Considering %p (vtable: %p)\n", ptr, *ptr));
- /* if the first word (the vtable) is outside the chunk we have an object */
- if (*ptr && (*ptr < (void*)chunk || *ptr >= end_chunk))
- callback (chunk, (char*)ptr, obj_size, callback_data);
- p += obj_size;
- }
- }
- }
-}
-
-static void
-sweep_pinned_objects_callback (PinnedChunk *chunk, char *ptr, size_t size, void *data)
-{
- if (object_is_pinned (ptr)) {
- unpin_object (ptr);
- DEBUG (6, fprintf (gc_debug_file, "Unmarked pinned object %p (%s)\n", ptr, safe_name (ptr)));
- } else {
- DEBUG (6, fprintf (gc_debug_file, "Freeing unmarked pinned object %p (%s)\n", ptr, safe_name (ptr)));
- free_pinned_object (chunk, ptr, size);
- }
-}
-
-static void
-sweep_pinned_objects (void)
-{
- scan_pinned_objects (sweep_pinned_objects_callback, NULL);
-}
-
-static void
-scan_object_callback (PinnedChunk *chunk, char *ptr, size_t size, char **data)
-{
- DEBUG (6, fprintf (gc_debug_file, "Precise object scan of alloc_pinned %p (%s)\n", ptr, safe_name (ptr)));
- /* FIXME: Put objects without references into separate chunks
- which do not need to be scanned */
- scan_object (ptr, data [0], data [1]);
-}
-
-static void
-scan_from_pinned_objects (char *addr_start, char *addr_end)
-{
- char *data [2] = { addr_start, addr_end };
- scan_pinned_objects ((ScanPinnedObjectCallbackFunc)scan_object_callback, data);
projects / mono.git / blobdiff