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-rw-r--r--transient_heap.c989
1 files changed, 0 insertions, 989 deletions
diff --git a/transient_heap.c b/transient_heap.c
deleted file mode 100644
index d2cf8e4bd9..0000000000
--- a/transient_heap.c
+++ /dev/null
@@ -1,989 +0,0 @@
-/**********************************************************************
-
- transient_heap.c - implement transient_heap.
-
- Copyright (C) 2018 Koichi Sasada
-
-**********************************************************************/
-
-#include "debug_counter.h"
-#include "gc.h"
-#include "internal.h"
-#include "internal/gc.h"
-#include "internal/hash.h"
-#include "internal/sanitizers.h"
-#include "internal/static_assert.h"
-#include "internal/struct.h"
-#include "internal/variable.h"
-#include "ruby/debug.h"
-#include "ruby/ruby.h"
-#include "ruby_assert.h"
-#include "transient_heap.h"
-#include "vm_debug.h"
-#include "vm_sync.h"
-
-#if USE_TRANSIENT_HEAP /* USE_TRANSIENT_HEAP */
-/*
- * 1: enable assertions
- * 2: enable verify all transient heaps
- */
-#ifndef TRANSIENT_HEAP_CHECK_MODE
-#define TRANSIENT_HEAP_CHECK_MODE 0
-#endif
-#define TH_ASSERT(expr) RUBY_ASSERT_MESG_WHEN(TRANSIENT_HEAP_CHECK_MODE > 0, expr, #expr)
-
-/*
- * 1: show events
- * 2: show dump at events
- * 3: show all operations
- */
-#define TRANSIENT_HEAP_DEBUG 0
-
-/* For Debug: Provide blocks infinitely.
- * This mode generates blocks unlimitedly
- * and prohibit access free'ed blocks to check invalid access.
- */
-#define TRANSIENT_HEAP_DEBUG_INFINITE_BLOCK 0
-
-#if TRANSIENT_HEAP_DEBUG_INFINITE_BLOCK
-#include <sys/mman.h>
-#include <errno.h>
-#endif
-
-/* For Debug: Prohibit promoting to malloc space.
- */
-#define TRANSIENT_HEAP_DEBUG_DONT_PROMOTE 0
-
-/* size configuration */
-#define TRANSIENT_HEAP_PROMOTED_DEFAULT_SIZE 1024
-
- /* K M */
-#define TRANSIENT_HEAP_BLOCK_SIZE (1024 * 32 ) /* 32KB int16_t */
-#define TRANSIENT_HEAP_TOTAL_SIZE (1024 * 1024 * 32) /* 32 MB */
-#define TRANSIENT_HEAP_ALLOC_MAX (1024 * 2 ) /* 2 KB */
-#define TRANSIENT_HEAP_BLOCK_NUM (TRANSIENT_HEAP_TOTAL_SIZE / TRANSIENT_HEAP_BLOCK_SIZE)
-#define TRANSIENT_HEAP_USABLE_SIZE (TRANSIENT_HEAP_BLOCK_SIZE - sizeof(struct transient_heap_block_header))
-
-#define TRANSIENT_HEAP_ALLOC_MAGIC 0xfeab
-#define TRANSIENT_HEAP_ALLOC_ALIGN RUBY_ALIGNOF(void *)
-
-#define TRANSIENT_HEAP_ALLOC_MARKING_LAST -1
-#define TRANSIENT_HEAP_ALLOC_MARKING_FREE -2
-
-enum transient_heap_status {
- transient_heap_none,
- transient_heap_marking,
- transient_heap_escaping
-};
-
-struct transient_heap_block {
- struct transient_heap_block_header {
- int16_t index;
- int16_t last_marked_index;
- int16_t objects;
- struct transient_heap_block *next_block;
- } info;
- char buff[TRANSIENT_HEAP_USABLE_SIZE];
-};
-
-struct transient_heap {
- struct transient_heap_block *using_blocks;
- struct transient_heap_block *marked_blocks;
- struct transient_heap_block *free_blocks;
- int total_objects;
- int total_marked_objects;
- int total_blocks;
- enum transient_heap_status status;
-
- VALUE *promoted_objects;
- int promoted_objects_size;
- int promoted_objects_index;
-
- struct transient_heap_block *arena;
- int arena_index; /* increment only */
-};
-
-struct transient_alloc_header {
- uint16_t magic;
- uint16_t size;
- int16_t next_marked_index;
- int16_t dummy;
- VALUE obj;
-};
-
-static struct transient_heap global_transient_heap;
-
-static void transient_heap_promote_add(struct transient_heap* theap, VALUE obj);
-static const void *transient_heap_ptr(VALUE obj, int error);
-static int transient_header_managed_ptr_p(struct transient_heap* theap, const void *ptr);
-
-#define ROUND_UP(v, a) (((size_t)(v) + (a) - 1) & ~((a) - 1))
-
-static void
-transient_heap_block_dump(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;
- fprintf(stderr, "%4d %8d %p size:%4d next:%4d %s\n", n, i, ptr, header->size, header->next_marked_index, rb_obj_info(header->obj));
- i += header->size;
- n++;
- }
-}
-
-static void
-transient_heap_blocks_dump(struct transient_heap* theap, struct transient_heap_block *block, const char *type_str)
-{
- while (block) {
- fprintf(stderr, "- transient_heap_dump: %s:%p index:%d objects:%d last_marked_index:%d next:%p\n",
- type_str, (void *)block, block->info.index, block->info.objects, block->info.last_marked_index, (void *)block->info.next_block);
-
- transient_heap_block_dump(theap, block);
- block = block->info.next_block;
- }
-}
-
-static void
-transient_heap_dump(struct transient_heap* theap)
-{
- fprintf(stderr, "transient_heap_dump objects:%d marked_objects:%d blocks:%d\n", theap->total_objects, theap->total_marked_objects, theap->total_blocks);
- transient_heap_blocks_dump(theap, theap->using_blocks, "using_blocks");
- transient_heap_blocks_dump(theap, theap->marked_blocks, "marked_blocks");
- transient_heap_blocks_dump(theap, theap->free_blocks, "free_blocks");
-}
-
-/* Debug: dump all transient_heap blocks */
-void
-rb_transient_heap_dump(void)
-{
- transient_heap_dump(&global_transient_heap);
-}
-
-#if TRANSIENT_HEAP_CHECK_MODE >= 2
-ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(static void transient_heap_ptr_check(struct transient_heap *theap, VALUE obj));
-static void
-transient_heap_ptr_check(struct transient_heap *theap, VALUE obj)
-{
- if (obj != Qundef) {
- const void *ptr = transient_heap_ptr(obj, FALSE);
- TH_ASSERT(ptr == NULL || transient_header_managed_ptr_p(theap, ptr));
- }
-}
-
-ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(static int transient_heap_block_verify(struct transient_heap *theap, struct transient_heap_block *block));
-static int
-transient_heap_block_verify(struct transient_heap *theap, struct transient_heap_block *block)
-{
- int i=0, n=0;
- struct transient_alloc_header *header;
-
- while (i<block->info.index) {
- header = (void *)&block->buff[i];
- TH_ASSERT(header->magic == TRANSIENT_HEAP_ALLOC_MAGIC);
- transient_heap_ptr_check(theap, header->obj);
- n ++;
- i += header->size;
- }
- TH_ASSERT(block->info.objects == n);
-
- return n;
-}
-
-static int
-transient_heap_blocks_verify(struct transient_heap *theap, struct transient_heap_block *blocks, int *block_num_ptr)
-{
- int n = 0;
- struct transient_heap_block *block = blocks;
- while (block) {
- n += transient_heap_block_verify(theap, block);
- *block_num_ptr += 1;
- block = block->info.next_block;
- }
-
- return n;
-}
-#endif
-
-static void
-transient_heap_verify(struct transient_heap *theap)
-{
-#if TRANSIENT_HEAP_CHECK_MODE >= 2
- int n=0, block_num=0;
-
- n += transient_heap_blocks_verify(theap, theap->using_blocks, &block_num);
- n += transient_heap_blocks_verify(theap, theap->marked_blocks, &block_num);
-
- TH_ASSERT(n == theap->total_objects);
- TH_ASSERT(n >= theap->total_marked_objects);
- TH_ASSERT(block_num == theap->total_blocks);
-#endif
-}
-
-/* Debug: check assertions for all transient_heap blocks */
-void
-rb_transient_heap_verify(void)
-{
- transient_heap_verify(&global_transient_heap);
-}
-
-static struct transient_heap*
-transient_heap_get(void)
-{
- struct transient_heap* theap = &global_transient_heap;
- transient_heap_verify(theap);
- return theap;
-}
-
-static void
-reset_block(struct transient_heap_block *block)
-{
- __msan_allocated_memory(block, sizeof block);
- block->info.index = 0;
- block->info.objects = 0;
- block->info.last_marked_index = TRANSIENT_HEAP_ALLOC_MARKING_LAST;
- block->info.next_block = NULL;
- __asan_poison_memory_region(&block->buff, sizeof block->buff);
-}
-
-static void
-connect_to_free_blocks(struct transient_heap *theap, struct transient_heap_block *block)
-{
- block->info.next_block = theap->free_blocks;
- theap->free_blocks = block;
-}
-
-static void
-connect_to_using_blocks(struct transient_heap *theap, struct transient_heap_block *block)
-{
- block->info.next_block = theap->using_blocks;
- theap->using_blocks = block;
-}
-
-#if 0
-static void
-connect_to_marked_blocks(struct transient_heap *theap, struct transient_heap_block *block)
-{
- block->info.next_block = theap->marked_blocks;
- theap->marked_blocks = block;
-}
-#endif
-
-static void
-append_to_marked_blocks(struct transient_heap *theap, struct transient_heap_block *append_blocks)
-{
- if (theap->marked_blocks) {
- struct transient_heap_block *block = theap->marked_blocks, *last_block = NULL;
- while (block) {
- last_block = block;
- block = block->info.next_block;
- }
-
- TH_ASSERT(last_block->info.next_block == NULL);
- last_block->info.next_block = append_blocks;
- }
- else {
- theap->marked_blocks = append_blocks;
- }
-}
-
-static struct transient_heap_block *
-transient_heap_block_alloc(struct transient_heap* theap)
-{
- struct transient_heap_block *block;
-#if TRANSIENT_HEAP_DEBUG_INFINITE_BLOCK
- block = mmap(NULL, TRANSIENT_HEAP_BLOCK_SIZE, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS,
- -1, 0);
- if (block == MAP_FAILED) rb_bug("transient_heap_block_alloc: err:%d\n", errno);
-#else
- if (theap->arena == NULL) {
- theap->arena = rb_aligned_malloc(TRANSIENT_HEAP_BLOCK_SIZE, TRANSIENT_HEAP_TOTAL_SIZE);
- if (theap->arena == NULL) {
- rb_bug("transient_heap_block_alloc: failed\n");
- }
- }
-
- TH_ASSERT(theap->arena_index < TRANSIENT_HEAP_BLOCK_NUM);
- block = &theap->arena[theap->arena_index++];
- TH_ASSERT(((intptr_t)block & (TRANSIENT_HEAP_BLOCK_SIZE - 1)) == 0);
-#endif
- reset_block(block);
-
- TH_ASSERT(((intptr_t)block->buff & (TRANSIENT_HEAP_ALLOC_ALIGN-1)) == 0);
- if (0) fprintf(stderr, "transient_heap_block_alloc: %4d %p\n", theap->total_blocks, (void *)block);
- return block;
-}
-
-
-static struct transient_heap_block *
-transient_heap_allocatable_block(struct transient_heap* theap)
-{
- struct transient_heap_block *block;
-
-#if TRANSIENT_HEAP_DEBUG_INFINITE_BLOCK
- block = transient_heap_block_alloc(theap);
- theap->total_blocks++;
-#else
- /* get one block from free_blocks */
- block = theap->free_blocks;
- if (block) {
- theap->free_blocks = block->info.next_block;
- block->info.next_block = NULL;
- theap->total_blocks++;
- }
-#endif
-
- return block;
-}
-
-static struct transient_alloc_header *
-transient_heap_allocatable_header(struct transient_heap* theap, size_t size)
-{
- struct transient_heap_block *block = theap->using_blocks;
-
- while (block) {
- TH_ASSERT(block->info.index <= (int16_t)TRANSIENT_HEAP_USABLE_SIZE);
-
- if (TRANSIENT_HEAP_USABLE_SIZE - block->info.index >= size) {
- struct transient_alloc_header *header = (void *)&block->buff[block->info.index];
- block->info.index += size;
- block->info.objects++;
- return header;
- }
- else {
- block = transient_heap_allocatable_block(theap);
- if (block) connect_to_using_blocks(theap, block);
- }
- }
-
- return NULL;
-}
-
-void *
-rb_transient_heap_alloc(VALUE obj, size_t req_size)
-{
- // only on single main ractor
- if (ruby_single_main_ractor == NULL) return NULL;
-
- void *ret;
- struct transient_heap* theap = transient_heap_get();
- size_t size = ROUND_UP(req_size + sizeof(struct transient_alloc_header), TRANSIENT_HEAP_ALLOC_ALIGN);
-
- TH_ASSERT(RB_TYPE_P(obj, T_ARRAY) ||
- RB_TYPE_P(obj, T_OBJECT) ||
- RB_TYPE_P(obj, T_STRUCT) ||
- RB_TYPE_P(obj, T_HASH)); /* supported types */
-
- if (size > TRANSIENT_HEAP_ALLOC_MAX) {
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "rb_transient_heap_alloc: [too big: %ld] %s\n", (long)size, rb_obj_info(obj));
- ret = NULL;
- }
-#if TRANSIENT_HEAP_DEBUG_DONT_PROMOTE == 0
- else if (RB_OBJ_PROMOTED_RAW(obj)) {
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "rb_transient_heap_alloc: [promoted object] %s\n", rb_obj_info(obj));
- ret = NULL;
- }
-#else
- else if (RBASIC_CLASS(obj) == 0) {
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "rb_transient_heap_alloc: [hidden object] %s\n", rb_obj_info(obj));
- ret = NULL;
- }
-#endif
- else {
- struct transient_alloc_header *header = transient_heap_allocatable_header(theap, size);
- if (header) {
- void *ptr;
-
- /* header is poisoned to prevent buffer overflow, should
- * unpoison first... */
- asan_unpoison_memory_region(header, sizeof *header, true);
-
- header->size = size;
- header->magic = TRANSIENT_HEAP_ALLOC_MAGIC;
- header->next_marked_index = TRANSIENT_HEAP_ALLOC_MARKING_FREE;
- header->obj = obj; /* TODO: can we eliminate it? */
-
- /* header is fixed; shall poison again */
- asan_poison_memory_region(header, sizeof *header);
- ptr = header + 1;
-
- theap->total_objects++; /* statistics */
-
-#if TRANSIENT_HEAP_DEBUG_DONT_PROMOTE
- if (RB_OBJ_PROMOTED_RAW(obj)) {
- transient_heap_promote_add(theap, obj);
- }
-#endif
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "rb_transient_heap_alloc: header:%p ptr:%p size:%d obj:%s\n", (void *)header, ptr, (int)size, rb_obj_info(obj));
-
- RB_DEBUG_COUNTER_INC(theap_alloc);
-
- /* ptr is set up; OK to unpoison. */
- asan_unpoison_memory_region(ptr, size - sizeof *header, true);
- ret = ptr;
- }
- else {
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "rb_transient_heap_alloc: [no enough space: %ld] %s\n", (long)size, rb_obj_info(obj));
- RB_DEBUG_COUNTER_INC(theap_alloc_fail);
- ret = NULL;
- }
- }
-
- return ret;
-}
-
-void
-Init_TransientHeap(void)
-{
- int i, block_num;
- struct transient_heap* theap = transient_heap_get();
-
-#if TRANSIENT_HEAP_DEBUG_INFINITE_BLOCK
- block_num = 0;
-#else
- TH_ASSERT(TRANSIENT_HEAP_BLOCK_SIZE * TRANSIENT_HEAP_BLOCK_NUM == TRANSIENT_HEAP_TOTAL_SIZE);
- block_num = TRANSIENT_HEAP_BLOCK_NUM;
-#endif
- for (i=0; i<block_num; i++) {
- connect_to_free_blocks(theap, transient_heap_block_alloc(theap));
- }
- theap->using_blocks = transient_heap_allocatable_block(theap);
-
- theap->promoted_objects_size = TRANSIENT_HEAP_PROMOTED_DEFAULT_SIZE;
- theap->promoted_objects_index = 0;
- /* should not use ALLOC_N to be free from GC */
- theap->promoted_objects = malloc(sizeof(VALUE) * theap->promoted_objects_size);
- STATIC_ASSERT(
- integer_overflow,
- sizeof(VALUE) <= SIZE_MAX / TRANSIENT_HEAP_PROMOTED_DEFAULT_SIZE);
- if (theap->promoted_objects == NULL) rb_bug("Init_TransientHeap: malloc failed.");
-}
-
-static struct transient_heap_block *
-blocks_alloc_header_to_block(struct transient_heap *theap, struct transient_heap_block *blocks, struct transient_alloc_header *header)
-{
- struct transient_heap_block *block = blocks;
-
- while (block) {
- if (block->buff <= (char *)header && (char *)header < block->buff + TRANSIENT_HEAP_USABLE_SIZE) {
- return block;
- }
- block = block->info.next_block;
- }
-
- return NULL;
-}
-
-static struct transient_heap_block *
-alloc_header_to_block_verbose(struct transient_heap *theap, struct transient_alloc_header *header)
-{
- struct transient_heap_block *block;
-
- if ((block = blocks_alloc_header_to_block(theap, theap->marked_blocks, header)) != NULL) {
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "alloc_header_to_block: found in marked_blocks\n");
- return block;
- }
- else if ((block = blocks_alloc_header_to_block(theap, theap->using_blocks, header)) != NULL) {
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "alloc_header_to_block: found in using_blocks\n");
- return block;
- }
- else {
- return NULL;
- }
-}
-
-static struct transient_alloc_header *
-ptr_to_alloc_header(const void *ptr)
-{
- struct transient_alloc_header *header = (void *)ptr;
- header -= 1;
- return header;
-}
-
-static int
-transient_header_managed_ptr_p(struct transient_heap* theap, const void *ptr)
-{
- if (alloc_header_to_block_verbose(theap, ptr_to_alloc_header(ptr))) {
- return TRUE;
- }
- else {
- return FALSE;
- }
-}
-
-
-int
-rb_transient_heap_managed_ptr_p(const void *ptr)
-{
- return transient_header_managed_ptr_p(transient_heap_get(), ptr);
-}
-
-static struct transient_heap_block *
-alloc_header_to_block(struct transient_heap *theap, struct transient_alloc_header *header)
-{
- struct transient_heap_block *block;
-#if TRANSIENT_HEAP_DEBUG_INFINITE_BLOCK
- block = alloc_header_to_block_verbose(theap, header);
- if (block == NULL) {
- transient_heap_dump(theap);
- rb_bug("alloc_header_to_block: not found in mark_blocks (%p)\n", header);
- }
-#else
- block = (void *)((intptr_t)header & ~(TRANSIENT_HEAP_BLOCK_SIZE-1));
- TH_ASSERT(block == alloc_header_to_block_verbose(theap, header));
-#endif
- return block;
-}
-
-void
-rb_transient_heap_mark(VALUE obj, const void *ptr)
-{
- ASSERT_vm_locking();
-
- struct transient_alloc_header *header = ptr_to_alloc_header(ptr);
- asan_unpoison_memory_region(header, sizeof *header, false);
- if (header->magic != TRANSIENT_HEAP_ALLOC_MAGIC) rb_bug("rb_transient_heap_mark: wrong header, %s (%p)", rb_obj_info(obj), ptr);
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "rb_transient_heap_mark: %s (%p)\n", rb_obj_info(obj), ptr);
-
-#if TRANSIENT_HEAP_CHECK_MODE > 0
- {
- struct transient_heap* theap = transient_heap_get();
- TH_ASSERT(theap->status == transient_heap_marking);
- TH_ASSERT(transient_header_managed_ptr_p(theap, ptr));
-
- if (header->magic != TRANSIENT_HEAP_ALLOC_MAGIC) {
- transient_heap_dump(theap);
- rb_bug("rb_transient_heap_mark: magic is broken");
- }
- else if (header->obj != obj) {
- // transient_heap_dump(theap);
- rb_bug("rb_transient_heap_mark: unmatch (%s is stored, but %s is given)\n",
- rb_obj_info(header->obj), rb_obj_info(obj));
- }
- }
-#endif
-
- if (header->next_marked_index != TRANSIENT_HEAP_ALLOC_MARKING_FREE) {
- /* already marked */
- return;
- }
- else {
- struct transient_heap* theap = transient_heap_get();
- struct transient_heap_block *block = alloc_header_to_block(theap, header);
- __asan_unpoison_memory_region(&block->info, sizeof block->info);
- header->next_marked_index = block->info.last_marked_index;
- block->info.last_marked_index = (int)((char *)header - block->buff);
- theap->total_marked_objects++;
-
- transient_heap_verify(theap);
- }
-}
-
-ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(static const void *transient_heap_ptr(VALUE obj, int error));
-static const void *
-transient_heap_ptr(VALUE obj, int error)
-{
- const void *ptr = NULL;
-
- switch (BUILTIN_TYPE(obj)) {
- case T_ARRAY:
- if (RARRAY_TRANSIENT_P(obj)) {
- TH_ASSERT(!FL_TEST_RAW(obj, RARRAY_EMBED_FLAG));
- ptr = RARRAY(obj)->as.heap.ptr;
- }
- break;
- case T_OBJECT:
- if (ROBJ_TRANSIENT_P(obj)) {
- ptr = ROBJECT_IVPTR(obj);
- }
- break;
- case T_STRUCT:
- if (RSTRUCT_TRANSIENT_P(obj)) {
- ptr = rb_struct_const_heap_ptr(obj);
- }
- break;
- case T_HASH:
- if (RHASH_TRANSIENT_P(obj)) {
- TH_ASSERT(RHASH_AR_TABLE_P(obj));
- ptr = (VALUE *)(RHASH(obj)->as.ar);
- }
- else {
- ptr = NULL;
- }
- break;
- default:
- if (error) {
- rb_bug("transient_heap_ptr: unknown obj %s\n", rb_obj_info(obj));
- }
- }
-
- return ptr;
-}
-
-static void
-transient_heap_promote_add(struct transient_heap* theap, VALUE obj)
-{
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, "rb_transient_heap_promote: %s\n", rb_obj_info(obj));
-
- if (TRANSIENT_HEAP_DEBUG_DONT_PROMOTE) {
- /* duplicate check */
- int i;
- for (i=0; i<theap->promoted_objects_index; i++) {
- if (theap->promoted_objects[i] == obj) return;
- }
- }
-
- if (theap->promoted_objects_size <= theap->promoted_objects_index) {
- theap->promoted_objects_size *= 2;
- if (TRANSIENT_HEAP_DEBUG >= 1) fprintf(stderr, "rb_transient_heap_promote: expand table to %d\n", theap->promoted_objects_size);
- if (UNLIKELY((size_t)theap->promoted_objects_size > SIZE_MAX / sizeof(VALUE))) {
- /* realloc failure due to integer overflow */
- theap->promoted_objects = NULL;
- }
- else {
- theap->promoted_objects = realloc(theap->promoted_objects, theap->promoted_objects_size * sizeof(VALUE));
- }
- if (theap->promoted_objects == NULL) rb_bug("rb_transient_heap_promote: realloc failed");
- }
- theap->promoted_objects[theap->promoted_objects_index++] = obj;
-}
-
-void
-rb_transient_heap_promote(VALUE obj)
-{
- ASSERT_vm_locking();
-
- if (transient_heap_ptr(obj, FALSE)) {
- struct transient_heap* theap = transient_heap_get();
- transient_heap_promote_add(theap, obj);
- }
- else {
- /* ignore */
- }
-}
-
-static struct transient_alloc_header *
-alloc_header(struct transient_heap_block* block, int index)
-{
- return (void *)&block->buff[index];
-}
-
-static void
-transient_heap_reset(void)
-{
- ASSERT_vm_locking();
-
- struct transient_heap* theap = transient_heap_get();
- struct transient_heap_block* block;
-
- if (TRANSIENT_HEAP_DEBUG >= 1) fprintf(stderr, "!! transient_heap_reset\n");
-
- block = theap->marked_blocks;
- while (block) {
- struct transient_heap_block *next_block = block->info.next_block;
- theap->total_objects -= block->info.objects;
-#if TRANSIENT_HEAP_DEBUG_INFINITE_BLOCK
- if (madvise(block, TRANSIENT_HEAP_BLOCK_SIZE, MADV_DONTNEED) != 0) {
- rb_bug("madvise err:%d", errno);
- }
- if (mprotect(block, TRANSIENT_HEAP_BLOCK_SIZE, PROT_NONE) != 0) {
- rb_bug("mprotect err:%d", errno);
- }
-#else
- reset_block(block);
- connect_to_free_blocks(theap, block);
-#endif
- theap->total_blocks--;
- block = next_block;
- }
-
- if (TRANSIENT_HEAP_DEBUG >= 1) fprintf(stderr, "!! transient_heap_reset block_num:%d\n", theap->total_blocks);
-
- theap->marked_blocks = NULL;
- theap->total_marked_objects = 0;
-}
-
-static void
-transient_heap_block_evacuate(struct transient_heap* theap, struct transient_heap_block* block)
-{
- int marked_index = block->info.last_marked_index;
- block->info.last_marked_index = TRANSIENT_HEAP_ALLOC_MARKING_LAST;
-
- while (marked_index >= 0) {
- struct transient_alloc_header *header = alloc_header(block, marked_index);
- asan_unpoison_memory_region(header, sizeof *header, true);
- VALUE obj = header->obj;
- TH_ASSERT(header->magic == TRANSIENT_HEAP_ALLOC_MAGIC);
- if (header->magic != TRANSIENT_HEAP_ALLOC_MAGIC) rb_bug("transient_heap_block_evacuate: wrong header %p %s\n", (void *)header, rb_obj_info(obj));
-
- if (TRANSIENT_HEAP_DEBUG >= 3) fprintf(stderr, " * transient_heap_block_evacuate %p %s\n", (void *)header, rb_obj_info(obj));
-
- if (obj != Qnil) {
- RB_DEBUG_COUNTER_INC(theap_evacuate);
-
- switch (BUILTIN_TYPE(obj)) {
- case T_ARRAY:
- rb_ary_transient_heap_evacuate(obj, !TRANSIENT_HEAP_DEBUG_DONT_PROMOTE);
- break;
- case T_OBJECT:
- rb_obj_transient_heap_evacuate(obj, !TRANSIENT_HEAP_DEBUG_DONT_PROMOTE);
- break;
- case T_STRUCT:
- rb_struct_transient_heap_evacuate(obj, !TRANSIENT_HEAP_DEBUG_DONT_PROMOTE);
- break;
- case T_HASH:
- rb_hash_transient_heap_evacuate(obj, !TRANSIENT_HEAP_DEBUG_DONT_PROMOTE);
- break;
- default:
- rb_bug("unsupported: %s\n", rb_obj_info(obj));
- }
- header->obj = Qundef; /* for debug */
- }
- marked_index = header->next_marked_index;
- asan_poison_memory_region(header, sizeof *header);
- }
-}
-
-#if USE_RUBY_DEBUG_LOG
-static const char *
-transient_heap_status_cstr(enum transient_heap_status status)
-{
- switch (status) {
- case transient_heap_none: return "none";
- case transient_heap_marking: return "marking";
- case transient_heap_escaping: return "escaping";
- }
- UNREACHABLE_RETURN(NULL);
-}
-#endif
-
-static void
-transient_heap_update_status(struct transient_heap* theap, enum transient_heap_status status)
-{
- RUBY_DEBUG_LOG("%s -> %s",
- transient_heap_status_cstr(theap->status),
- transient_heap_status_cstr(status));
-
- TH_ASSERT(theap->status != status);
- theap->status = status;
-}
-
-static void
-transient_heap_evacuate(void *dmy)
-{
- struct transient_heap* theap = transient_heap_get();
-
- if (theap->total_marked_objects == 0) return;
- if (ruby_single_main_ractor == NULL) rb_bug("not single ractor mode");
- if (theap->status == transient_heap_marking) {
- if (TRANSIENT_HEAP_DEBUG >= 1) fprintf(stderr, "!! transient_heap_evacuate: skip while transient_heap_marking\n");
- }
- else {
- VALUE gc_disabled = rb_gc_disable_no_rest();
- {
- struct transient_heap_block* block;
-
- RUBY_DEBUG_LOG("start gc_disabled:%d", RTEST(gc_disabled));
-
- if (TRANSIENT_HEAP_DEBUG >= 1) {
- int i;
- fprintf(stderr, "!! transient_heap_evacuate start total_blocks:%d\n", theap->total_blocks);
- if (TRANSIENT_HEAP_DEBUG >= 4) {
- for (i=0; i<theap->promoted_objects_index; i++) fprintf(stderr, "%4d %s\n", i, rb_obj_info(theap->promoted_objects[i]));
- }
- }
- if (TRANSIENT_HEAP_DEBUG >= 2) transient_heap_dump(theap);
-
- TH_ASSERT(theap->status == transient_heap_none);
- transient_heap_update_status(theap, transient_heap_escaping);
-
- /* evacuate from marked blocks */
- block = theap->marked_blocks;
- while (block) {
- transient_heap_block_evacuate(theap, block);
- block = block->info.next_block;
- }
-
- /* evacuate from using blocks
- only affect incremental marking */
- block = theap->using_blocks;
- while (block) {
- transient_heap_block_evacuate(theap, block);
- block = block->info.next_block;
- }
-
- /* all objects in marked_objects are escaped. */
- transient_heap_reset();
-
- if (TRANSIENT_HEAP_DEBUG > 0) {
- fprintf(stderr, "!! transient_heap_evacuate end total_blocks:%d\n", theap->total_blocks);
- }
-
- transient_heap_verify(theap);
- transient_heap_update_status(theap, transient_heap_none);
- }
- if (gc_disabled != Qtrue) rb_gc_enable();
- RUBY_DEBUG_LOG("finish");
- }
-}
-
-void
-rb_transient_heap_evacuate(void)
-{
- transient_heap_evacuate(NULL);
-}
-
-static void
-clear_marked_index(struct transient_heap_block* block)
-{
- int marked_index = block->info.last_marked_index;
-
- while (marked_index != TRANSIENT_HEAP_ALLOC_MARKING_LAST) {
- struct transient_alloc_header *header = alloc_header(block, marked_index);
- /* header is poisoned to prevent buffer overflow, should
- * unpoison first... */
- asan_unpoison_memory_region(header, sizeof *header, false);
- TH_ASSERT(marked_index != TRANSIENT_HEAP_ALLOC_MARKING_FREE);
- if (0) fprintf(stderr, "clear_marked_index - block:%p mark_index:%d\n", (void *)block, marked_index);
-
- marked_index = header->next_marked_index;
- header->next_marked_index = TRANSIENT_HEAP_ALLOC_MARKING_FREE;
- }
-
- block->info.last_marked_index = TRANSIENT_HEAP_ALLOC_MARKING_LAST;
-}
-
-static void
-blocks_clear_marked_index(struct transient_heap_block* block)
-{
- while (block) {
- clear_marked_index(block);
- block = block->info.next_block;
- }
-}
-
-static void
-transient_heap_block_update_refs(struct transient_heap* theap, struct transient_heap_block* block)
-{
- int marked_index = block->info.last_marked_index;
-
- while (marked_index >= 0) {
- struct transient_alloc_header *header = alloc_header(block, marked_index);
-
- asan_unpoison_memory_region(header, sizeof *header, false);
-
- header->obj = rb_gc_location(header->obj);
-
- marked_index = header->next_marked_index;
- asan_poison_memory_region(header, sizeof *header);
- }
-}
-
-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)
-{
- ASSERT_vm_locking();
-
- 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_location(obj);
- }
-}
-
-void
-rb_transient_heap_start_marking(int full_marking)
-{
- ASSERT_vm_locking();
- RUBY_DEBUG_LOG("full?:%d", full_marking);
-
- struct transient_heap* theap = transient_heap_get();
-
- if (TRANSIENT_HEAP_DEBUG >= 1) fprintf(stderr, "!! rb_transient_heap_start_marking objects:%d blocks:%d promoted:%d full_marking:%d\n",
- theap->total_objects, theap->total_blocks, theap->promoted_objects_index, full_marking);
- if (TRANSIENT_HEAP_DEBUG >= 2) transient_heap_dump(theap);
-
- blocks_clear_marked_index(theap->marked_blocks);
- blocks_clear_marked_index(theap->using_blocks);
-
- if (theap->using_blocks) {
- if (theap->using_blocks->info.objects > 0) {
- append_to_marked_blocks(theap, theap->using_blocks);
- theap->using_blocks = NULL;
- }
- else {
- append_to_marked_blocks(theap, theap->using_blocks->info.next_block);
- theap->using_blocks->info.next_block = NULL;
- }
- }
-
- if (theap->using_blocks == NULL) {
- theap->using_blocks = transient_heap_allocatable_block(theap);
- }
-
- TH_ASSERT(theap->status == transient_heap_none);
- transient_heap_update_status(theap, transient_heap_marking);
- theap->total_marked_objects = 0;
-
- if (full_marking) {
- theap->promoted_objects_index = 0;
- }
- else { /* mark promoted objects */
- int i;
- for (i=0; i<theap->promoted_objects_index; i++) {
- VALUE obj = theap->promoted_objects[i];
- const void *ptr = transient_heap_ptr(obj, TRUE);
- if (ptr) {
- rb_transient_heap_mark(obj, ptr);
- }
- }
- }
-
- transient_heap_verify(theap);
-}
-
-void
-rb_transient_heap_finish_marking(void)
-{
- ASSERT_vm_locking();
- RUBY_DEBUG_LOG("");
-
- struct transient_heap* theap = transient_heap_get();
-
- RUBY_DEBUG_LOG("objects:%d, marked:%d",
- theap->total_objects,
- theap->total_marked_objects);
- if (TRANSIENT_HEAP_DEBUG >= 2) transient_heap_dump(theap);
-
- TH_ASSERT(theap->total_objects >= theap->total_marked_objects);
-
- TH_ASSERT(theap->status == transient_heap_marking);
- transient_heap_update_status(theap, transient_heap_none);
-
- if (theap->total_marked_objects > 0) {
- if (TRANSIENT_HEAP_DEBUG >= 1) fprintf(stderr, "-> rb_transient_heap_finish_marking register escape func.\n");
- rb_postponed_job_register_one(0, transient_heap_evacuate, NULL);
- }
- else {
- transient_heap_reset();
- }
-
- transient_heap_verify(theap);
-}
-#endif /* USE_TRANSIENT_HEAP */