[profiler] Graphical front-end for tick processor.

tools/codemap.js

Index: tools/codemap.js
diff --git a/tools/codemap.js b/tools/codemap.js
index 30cdc21db50160b3363cbc34131487003ae94492..df6770f9a88087e5daa62ac0dee433ed27fdaa92 100644
--- a/tools/codemap.js
+++ b/tools/codemap.js
@@ -175,23 +175,28 @@ CodeMap.prototype.isAddressBelongsTo_ = function(addr, node) {
  */
 CodeMap.prototype.findInTree_ = function(tree, addr) {
   var node = tree.findGreatestLessThan(addr);
-  return node && this.isAddressBelongsTo_(addr, node) ? node.value : null;
+  return node && this.isAddressBelongsTo_(addr, node) ? node : null;
 };
 
 
 /**
  * Finds a code entry that contains the specified address. Both static and
- * dynamic code entries are considered.
+ * dynamic code entries are considered. Returns the code entry and the offset
+ * within the entry.
  *
  * @param {number} addr Address.
  */
-CodeMap.prototype.findEntry = function(addr) {
+CodeMap.prototype.findAddress = function(addr) {
   var pageAddr = addr >>> CodeMap.PAGE_ALIGNMENT;
   if (pageAddr in this.pages_) {
     // Static code entries can contain "holes" of unnamed code.
     // In this case, the whole library is assigned to this address.
-    return this.findInTree_(this.statics_, addr) ||
-        this.findInTree_(this.libraries_, addr);
+    var result = this.findInTree_(this.statics_, addr);
+    if (!result) {
+      result = this.findInTree_(this.libraries_, addr);
+      if (!result) return null;
+    }
+    return { entry : result.value, offset : addr - result.key };
   }
   var min = this.dynamics_.findMin();
   var max = this.dynamics_.findMax();
@@ -199,17 +204,30 @@ CodeMap.prototype.findEntry = function(addr) {
     var dynaEntry = this.findInTree_(this.dynamics_, addr);
     if (dynaEntry == null) return null;
     // Dedupe entry name.
-    if (!dynaEntry.nameUpdated_) {
-      dynaEntry.name = this.dynamicsNameGen_.getName(dynaEntry.name);
-      dynaEntry.nameUpdated_ = true;
+    var entry = dynaEntry.value;
+    if (!entry.nameUpdated_) {
+      entry.name = this.dynamicsNameGen_.getName(entry.name);
+      entry.nameUpdated_ = true;
     }
-    return dynaEntry;
+    return { entry : entry, offset : addr - dynaEntry.key };
   }
   return null;
 };
 
 
 /**
+ * Finds a code entry that contains the specified address. Both static and
+ * dynamic code entries are considered.
+ *
+ * @param {number} addr Address.
+ */
+CodeMap.prototype.findEntry = function(addr) {
+  var result = this.findAddress(addr);
+  return result ? result.entry : null;
+};
+
+
+/**
  * Returns a dynamic code entry using its starting address.
  *
  * @param {number} addr Address.