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-rw-r--r--dom/heapsnapshot/HeapAnalysesWorker.js303
1 files changed, 0 insertions, 303 deletions
diff --git a/dom/heapsnapshot/HeapAnalysesWorker.js b/dom/heapsnapshot/HeapAnalysesWorker.js
deleted file mode 100644
index d07d67f80..000000000
--- a/dom/heapsnapshot/HeapAnalysesWorker.js
+++ /dev/null
@@ -1,303 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-/* global ThreadSafeChromeUtils*/
-
-// This is a worker which reads offline heap snapshots into memory and performs
-// heavyweight analyses on them without blocking the main thread. A
-// HeapAnalysesWorker is owned and communicated with by a HeapAnalysesClient
-// instance. See HeapAnalysesClient.js.
-
-"use strict";
-
-importScripts("resource://gre/modules/workers/require.js");
-importScripts("resource://devtools/shared/worker/helper.js");
-const { censusReportToCensusTreeNode } = require("resource://devtools/shared/heapsnapshot/census-tree-node.js");
-const DominatorTreeNode = require("resource://devtools/shared/heapsnapshot/DominatorTreeNode.js");
-const CensusUtils = require("resource://devtools/shared/heapsnapshot/CensusUtils.js");
-
-const DEFAULT_START_INDEX = 0;
-const DEFAULT_MAX_COUNT = 50;
-
-/**
- * The set of HeapSnapshot instances this worker has read into memory. Keyed by
- * snapshot file path.
- */
-const snapshots = Object.create(null);
-
-/**
- * The set of `DominatorTree`s that have been computed, mapped by their id (aka
- * the index into this array).
- *
- * @see /dom/webidl/DominatorTree.webidl
- */
-const dominatorTrees = [];
-
-/**
- * The i^th HeapSnapshot in this array is the snapshot used to generate the i^th
- * dominator tree in `dominatorTrees` above. This lets us map from a dominator
- * tree id to the snapshot it came from.
- */
-const dominatorTreeSnapshots = [];
-
-/**
- * @see HeapAnalysesClient.prototype.readHeapSnapshot
- */
-workerHelper.createTask(self, "readHeapSnapshot", ({ snapshotFilePath }) => {
- snapshots[snapshotFilePath] =
- ThreadSafeChromeUtils.readHeapSnapshot(snapshotFilePath);
- return true;
-});
-
-/**
- * @see HeapAnalysesClient.prototype.deleteHeapSnapshot
- */
-workerHelper.createTask(self, "deleteHeapSnapshot", ({ snapshotFilePath }) => {
- let snapshot = snapshots[snapshotFilePath];
- if (!snapshot) {
- throw new Error(`No known heap snapshot for '${snapshotFilePath}'`);
- }
-
- snapshots[snapshotFilePath] = undefined;
-
- let dominatorTreeId = dominatorTreeSnapshots.indexOf(snapshot);
- if (dominatorTreeId != -1) {
- dominatorTreeSnapshots[dominatorTreeId] = undefined;
- dominatorTrees[dominatorTreeId] = undefined;
- }
-});
-
-/**
- * @see HeapAnalysesClient.prototype.takeCensus
- */
-workerHelper.createTask(self, "takeCensus", ({ snapshotFilePath, censusOptions, requestOptions }) => {
- if (!snapshots[snapshotFilePath]) {
- throw new Error(`No known heap snapshot for '${snapshotFilePath}'`);
- }
-
- let report = snapshots[snapshotFilePath].takeCensus(censusOptions);
- let parentMap;
-
- if (requestOptions.asTreeNode || requestOptions.asInvertedTreeNode) {
- const opts = { filter: requestOptions.filter || null };
- if (requestOptions.asInvertedTreeNode) {
- opts.invert = true;
- }
- report = censusReportToCensusTreeNode(censusOptions.breakdown, report, opts);
- parentMap = CensusUtils.createParentMap(report);
- }
-
- return { report, parentMap };
-});
-
-/**
- * @see HeapAnalysesClient.prototype.getCensusIndividuals
- */
-workerHelper.createTask(self, "getCensusIndividuals", request => {
- const {
- dominatorTreeId,
- indices,
- censusBreakdown,
- labelBreakdown,
- maxRetainingPaths,
- maxIndividuals,
- } = request;
-
- const dominatorTree = dominatorTrees[dominatorTreeId];
- if (!dominatorTree) {
- throw new Error(
- `There does not exist a DominatorTree with the id ${dominatorTreeId}`);
- }
-
- const snapshot = dominatorTreeSnapshots[dominatorTreeId];
- const nodeIds = CensusUtils.getCensusIndividuals(indices, censusBreakdown, snapshot);
-
- const nodes = nodeIds
- .sort((a, b) => dominatorTree.getRetainedSize(b) - dominatorTree.getRetainedSize(a))
- .slice(0, maxIndividuals)
- .map(id => {
- const { label, shallowSize } =
- DominatorTreeNode.getLabelAndShallowSize(id, snapshot, labelBreakdown);
- const retainedSize = dominatorTree.getRetainedSize(id);
- const node = new DominatorTreeNode(id, label, shallowSize, retainedSize);
- node.moreChildrenAvailable = false;
- return node;
- });
-
- DominatorTreeNode.attachShortestPaths(snapshot,
- labelBreakdown,
- dominatorTree.root,
- nodes,
- maxRetainingPaths);
-
- return { nodes };
-});
-
-/**
- * @see HeapAnalysesClient.prototype.takeCensusDiff
- */
-workerHelper.createTask(self, "takeCensusDiff", request => {
- const {
- firstSnapshotFilePath,
- secondSnapshotFilePath,
- censusOptions,
- requestOptions
- } = request;
-
- if (!snapshots[firstSnapshotFilePath]) {
- throw new Error(`No known heap snapshot for '${firstSnapshotFilePath}'`);
- }
-
- if (!snapshots[secondSnapshotFilePath]) {
- throw new Error(`No known heap snapshot for '${secondSnapshotFilePath}'`);
- }
-
- const first = snapshots[firstSnapshotFilePath].takeCensus(censusOptions);
- const second = snapshots[secondSnapshotFilePath].takeCensus(censusOptions);
- let delta = CensusUtils.diff(censusOptions.breakdown, first, second);
- let parentMap;
-
- if (requestOptions.asTreeNode || requestOptions.asInvertedTreeNode) {
- const opts = { filter: requestOptions.filter || null };
- if (requestOptions.asInvertedTreeNode) {
- opts.invert = true;
- }
- delta = censusReportToCensusTreeNode(censusOptions.breakdown, delta, opts);
- parentMap = CensusUtils.createParentMap(delta);
- }
-
- return { delta, parentMap };
-});
-
-/**
- * @see HeapAnalysesClient.prototype.getCreationTime
- */
-workerHelper.createTask(self, "getCreationTime", snapshotFilePath => {
- if (!snapshots[snapshotFilePath]) {
- throw new Error(`No known heap snapshot for '${snapshotFilePath}'`);
- }
- return snapshots[snapshotFilePath].creationTime;
-});
-
-/**
- * @see HeapAnalysesClient.prototype.computeDominatorTree
- */
-workerHelper.createTask(self, "computeDominatorTree", snapshotFilePath => {
- const snapshot = snapshots[snapshotFilePath];
- if (!snapshot) {
- throw new Error(`No known heap snapshot for '${snapshotFilePath}'`);
- }
-
- const id = dominatorTrees.length;
- dominatorTrees.push(snapshot.computeDominatorTree());
- dominatorTreeSnapshots.push(snapshot);
- return id;
-});
-
-/**
- * @see HeapAnalysesClient.prototype.getDominatorTree
- */
-workerHelper.createTask(self, "getDominatorTree", request => {
- const {
- dominatorTreeId,
- breakdown,
- maxDepth,
- maxSiblings,
- maxRetainingPaths,
- } = request;
-
- if (!(0 <= dominatorTreeId && dominatorTreeId < dominatorTrees.length)) {
- throw new Error(
- `There does not exist a DominatorTree with the id ${dominatorTreeId}`);
- }
-
- const dominatorTree = dominatorTrees[dominatorTreeId];
- const snapshot = dominatorTreeSnapshots[dominatorTreeId];
-
- const tree = DominatorTreeNode.partialTraversal(dominatorTree,
- snapshot,
- breakdown,
- maxDepth,
- maxSiblings);
-
- const nodes = [];
- (function getNodes(node) {
- nodes.push(node);
- if (node.children) {
- for (let i = 0, length = node.children.length; i < length; i++) {
- getNodes(node.children[i]);
- }
- }
- }(tree));
-
- DominatorTreeNode.attachShortestPaths(snapshot,
- breakdown,
- dominatorTree.root,
- nodes,
- maxRetainingPaths);
-
- return tree;
-});
-
-/**
- * @see HeapAnalysesClient.prototype.getImmediatelyDominated
- */
-workerHelper.createTask(self, "getImmediatelyDominated", request => {
- const {
- dominatorTreeId,
- nodeId,
- breakdown,
- startIndex,
- maxCount,
- maxRetainingPaths,
- } = request;
-
- if (!(0 <= dominatorTreeId && dominatorTreeId < dominatorTrees.length)) {
- throw new Error(
- `There does not exist a DominatorTree with the id ${dominatorTreeId}`);
- }
-
- const dominatorTree = dominatorTrees[dominatorTreeId];
- const snapshot = dominatorTreeSnapshots[dominatorTreeId];
-
- const childIds = dominatorTree.getImmediatelyDominated(nodeId);
- if (!childIds) {
- throw new Error(`${nodeId} is not a node id in the dominator tree`);
- }
-
- const start = startIndex || DEFAULT_START_INDEX;
- const count = maxCount || DEFAULT_MAX_COUNT;
- const end = start + count;
-
- const nodes = childIds
- .slice(start, end)
- .map(id => {
- const { label, shallowSize } =
- DominatorTreeNode.getLabelAndShallowSize(id, snapshot, breakdown);
- const retainedSize = dominatorTree.getRetainedSize(id);
- const node = new DominatorTreeNode(id, label, shallowSize, retainedSize);
- node.parentId = nodeId;
- // DominatorTree.getImmediatelyDominated will always return non-null here
- // because we got the id directly from the dominator tree.
- node.moreChildrenAvailable = dominatorTree.getImmediatelyDominated(id).length > 0;
- return node;
- });
-
- const path = [];
- let id = nodeId;
- do {
- path.push(id);
- id = dominatorTree.getImmediateDominator(id);
- } while (id !== null);
- path.reverse();
-
- const moreChildrenAvailable = childIds.length > end;
-
- DominatorTreeNode.attachShortestPaths(snapshot,
- breakdown,
- dominatorTree.root,
- nodes,
- maxRetainingPaths);
-
- return { nodes, moreChildrenAvailable, path };
-});
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-15 21:25:49 +0000