On Linux, move the passing of filedescriptors to a dedicated socketpair().

chrome/tools/test/reference_build/chrome_linux/resources/inspector/BottomUpProfileDataGridTree.js

+/*
+ * Copyright (C) 2009 280 North Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// Bottom Up Profiling shows the entire callstack backwards:
+// The root node is a representation of each individual function called, and each child of that node represents
+// a reverse-callstack showing how many of those calls came from it. So, unlike top-down, the statistics in
+// each child still represent the root node. We have to be particularly careful of recursion with this mode
+// because a root node can represent itself AND an ancestor.
+
+WebInspector.BottomUpProfileDataGridTree = function(/*ProfileView*/ aProfileView, /*ProfileNode*/ aProfileNode)
+{
+    WebInspector.ProfileDataGridTree.call(this, aProfileView, aProfileNode);
+
+    // Iterate each node in pre-order.
+    var profileNodeUIDs = 0;
+    var profileNodeGroups = [[], [aProfileNode]];
+    var visitedProfileNodesForCallUID = {};
+
+    this._remainingNodeInfos = [];
+
+    for (var profileNodeGroupIndex = 0; profileNodeGroupIndex < profileNodeGroups.length; ++profileNodeGroupIndex) {
+        var parentProfileNodes = profileNodeGroups[profileNodeGroupIndex];
+        var profileNodes = profileNodeGroups[++profileNodeGroupIndex];
+        var count = profileNodes.length;
+
+        for (var index = 0; index < count; ++index) {
+            var profileNode = profileNodes[index];
+
+            if (!profileNode.UID)
+                profileNode.UID = ++profileNodeUIDs;
+
+            if (profileNode.head && profileNode !== profileNode.head) {
+                // The total time of this ancestor is accounted for if we're in any form of recursive cycle.
+                var visitedNodes = visitedProfileNodesForCallUID[profileNode.callUID];
+                var totalTimeAccountedFor = false;
+
+                if (!visitedNodes) {
+                    visitedNodes = {}
+                    visitedProfileNodesForCallUID[profileNode.callUID] = visitedNodes;
+                } else {
+                    // The total time for this node has already been accounted for iff one of it's parents has already been visited.
+                    // We can do this check in this style because we are traversing the tree in pre-order.
+                    var parentCount = parentProfileNodes.length;
+                    for (var parentIndex = 0; parentIndex < parentCount; ++parentIndex) {
+                        if (visitedNodes[parentProfileNodes[parentIndex].UID]) {
+                            totalTimeAccountedFor = true;
+                            break;
+                        }
+                    }
+                }
+
+                visitedNodes[profileNode.UID] = true;
+
+                this._remainingNodeInfos.push({ ancestor:profileNode, focusNode:profileNode, totalTimeAccountedFor:totalTimeAccountedFor });
+            }
+
+            var children = profileNode.children;
+            if (children.length) {
+                profileNodeGroups.push(parentProfileNodes.concat([profileNode]))
+                profileNodeGroups.push(children);
+            }
+        }
+    }
+
+    // Populate the top level nodes.
+    WebInspector.BottomUpProfileDataGridNode.prototype._populate.call(this);
+
+    return this;
+}
+
+WebInspector.BottomUpProfileDataGridTree.prototype = {
+    // When focusing, we keep the entire callstack up to this ancestor.
+    focus: function(/*ProfileDataGridNode*/ profileDataGridNode)
+    {
+        if (!profileDataGridNode)
+            return;
+
+        this._save();
+
+        var currentNode = profileDataGridNode;
+        var focusNode = profileDataGridNode;
+
+        while (currentNode.parent && (currentNode instanceof WebInspector.ProfileDataGridNode)) {
+            currentNode._takePropertiesFromProfileDataGridNode(profileDataGridNode);
+
+            focusNode = currentNode;
+            currentNode = currentNode.parent;
+
+            if (currentNode instanceof WebInspector.ProfileDataGridNode)
+                currentNode._keepOnlyChild(focusNode);
+        }
+
+        this.children = [focusNode];
+        this.totalTime = profileDataGridNode.totalTime;
+    },
+
+    exclude: function(/*ProfileDataGridNode*/ profileDataGridNode)
+    {
+        if (!profileDataGridNode)
+            return;
+
+        this._save();
+
+        var excludedCallUID = profileDataGridNode.callUID;
+        var excludedTopLevelChild = this.childrenByCallUID[excludedCallUID];
+
+        // If we have a top level node that is excluded, get rid of it completely (not keeping children),
+        // since bottom up data relies entirely on the root node.
+        if (excludedTopLevelChild)
+            this.children.remove(excludedTopLevelChild);
+
+        var children = this.children;
+        var count = children.length;
+
+        for (var index = 0; index < count; ++index)
+            children[index]._exclude(excludedCallUID);
+
+        if (this.lastComparator)
+            this.sort(this.lastComparator, true);
+    }
+}
+
+WebInspector.BottomUpProfileDataGridTree.prototype.__proto__ = WebInspector.ProfileDataGridTree.prototype;
+
+WebInspector.BottomUpProfileDataGridNode = function(/*ProfileView*/ profileView, /*ProfileNode*/ profileNode, /*BottomUpProfileDataGridTree*/ owningTree)
+{
+    // In bottom up mode, our parents are our children since we display an inverted tree.
+    // However, we don't want to show the very top parent since it is redundant.
+    var hasChildren = !!(profileNode.parent && profileNode.parent.parent);
+
+    WebInspector.ProfileDataGridNode.call(this, profileView, profileNode, owningTree, hasChildren);
+
+    this._remainingNodeInfos = [];
+}
+
+WebInspector.BottomUpProfileDataGridNode.prototype = {
+    _takePropertiesFromProfileDataGridNode: function(/*ProfileDataGridNode*/ profileDataGridNode)
+    {
+        this._save();
+
+        this.selfTime = profileDataGridNode.selfTime;
+        this.totalTime = profileDataGridNode.totalTime;
+        this.numberOfCalls = profileDataGridNode.numberOfCalls;
+    },
+
+    // When focusing, we keep just the members of the callstack.
+    _keepOnlyChild: function(/*ProfileDataGridNode*/ child)
+    {
+        this._save();
+
+        this.removeChildren();
+        this.appendChild(child);
+    },
+
+    _exclude: function(aCallUID)
+    {
+        if (this._remainingNodeInfos)
+            this._populate();
+
+        this._save();
+
+        var children = this.children;
+        var index = this.children.length;
+
+        while (index--)
+            children[index]._exclude(aCallUID);
+
+        var child = this.childrenByCallUID[aCallUID];
+
+        if (child)
+            this._merge(child, true);
+    },
+
+    _merge: function(/*ProfileDataGridNode*/ child, /*Boolean*/ shouldAbsorb)
+    {
+        this.selfTime -= child.selfTime;
+
+        WebInspector.ProfileDataGridNode.prototype._merge.call(this, child, shouldAbsorb);
+    },
+
+    _populate: function(event)
+    {
+        var remainingNodeInfos = this._remainingNodeInfos;
+        var count = remainingNodeInfos.length;
+
+        for (var index = 0; index < count; ++index) {
+            var nodeInfo = remainingNodeInfos[index];
+            var ancestor = nodeInfo.ancestor;
+            var focusNode = nodeInfo.focusNode;
+            var child = this.findChild(ancestor);
+
+            // If we already have this child, then merge the data together.
+            if (child) {
+                var totalTimeAccountedFor = nodeInfo.totalTimeAccountedFor;
+
+                child.selfTime += focusNode.selfTime;
+                child.numberOfCalls += focusNode.numberOfCalls;
+
+                if (!totalTimeAccountedFor)
+                    child.totalTime += focusNode.totalTime;
+            } else {
+                // If not, add it as a true ancestor.
+                // In heavy mode, we take our visual identity from ancestor node...
+                var child = new WebInspector.BottomUpProfileDataGridNode(this.profileView, ancestor, this.tree);
+
+                if (ancestor !== focusNode) {
+                    // but the actual statistics from the "root" node (bottom of the callstack).
+                    child.selfTime = focusNode.selfTime;
+                    child.totalTime = focusNode.totalTime;
+                    child.numberOfCalls = focusNode.numberOfCalls;
+                }
+
+                this.appendChild(child);
+            }
+
+            var parent = ancestor.parent;
+            if (parent && parent.parent) {
+                nodeInfo.ancestor = parent;
+                child._remainingNodeInfos.push(nodeInfo);
+            }
+        }
+
+        delete this._remainingNodeInfos;
+
+        if (this.removeEventListener)
+            this.removeEventListener("populate", this._populate, this);
+    }
+}
+
+WebInspector.BottomUpProfileDataGridNode.prototype.__proto__ = WebInspector.ProfileDataGridNode.prototype;