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This commit is contained in:
dcode
2019-03-14 04:33:58 +01:00
parent e38f627c8b
commit 6163a73ab5
30 changed files with 645 additions and 1287 deletions
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24
std/assembly/collector/itcm.ts
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@@ -1,9 +1,3 @@
/**
* Incremental Tri-Color-Marking Garbage Collector.
*
* @module std/assembly/collector/itcm
*//***/
// Largely based on Bach Le's μgc, see: https://github.com/bullno1/ugc
@inline const TRACE = false;
@@ -11,8 +5,8 @@
/** Size of a managed object header. */
@inline export const HEADER_SIZE: usize = (offsetof<ManagedObject>() + AL_MASK) & ~AL_MASK;
import { AL_MASK, MAX_SIZE_32 } from "../internal/allocator";
import { __rt_iterateroots } from "../builtins";
import { AL_MASK, MAX_SIZE_32 } from "../util/allocator";
import { gc } from "../gc";
/** Collector states. */
const enum State {
@@ -142,7 +136,7 @@ function step(): void {
}
case State.IDLE: {
if (TRACE) trace("gc~step/IDLE");
__rt_iterateroots(__gc_mark);
gc.iterateRoots(__gc_mark);
state = State.MARK;
if (TRACE) trace("gc~state = MARK");
break;
@@ -163,7 +157,7 @@ function step(): void {
obj.hookFn(objToRef(obj));
} else {
if (TRACE) trace("gc~step/MARK finish");
__rt_iterateroots(__gc_mark);
gc.iterateRoots(__gc_mark);
obj = iter.next;
if (obj === toSpace) {
let from = fromSpace;
@@ -202,9 +196,7 @@ function step(): void {
return changetype<usize>(obj) + HEADER_SIZE;
}
// Garbage collector interface
@global export function __gc_allocate(
@global @unsafe export function __gc_allocate( // TODO: make this register only / reuse header
size: usize,
markFn: (ref: usize) => void
): usize {
@@ -218,13 +210,13 @@ function step(): void {
return objToRef(obj);
}
@global export function __gc_link(parentRef: usize, childRef: usize): void {
@global @unsafe export function __gc_link(parentRef: usize, childRef: usize): void {
if (TRACE) trace("gc.link", 2, parentRef, childRef);
var parent = refToObj(parentRef);
if (parent.color == <i32>!white && refToObj(childRef).color == white) parent.makeGray();
}
@global export function __gc_mark(ref: usize): void {
@global @unsafe export function __gc_mark(ref: usize): void {
if (TRACE) trace("gc.mark", 1, ref);
if (ref) {
let obj = refToObj(ref);
@@ -232,7 +224,7 @@ function step(): void {
}
}
@global export function __gc_collect(): void {
@global @unsafe export function __gc_collect(): void {
if (TRACE) trace("gc.collect");
// begin collecting if not yet collecting
switch (state) {