Upgrade V8 to 2.4.4

deps/v8/AUTHORS

@@ -9,6 +9,8 @@ ARM Ltd.
 
 Alexander Botero-Lowry <alexbl@FreeBSD.org>
 Alexandre Vassalotti <avassalotti@gmail.com>
+Andreas Anyuru <andreas.anyuru@gmail.com>
+Burcu Dogan <burcujdogan@gmail.com>
 Craig Schlenter <craig.schlenter@gmail.com>
 Daniel Andersson <kodandersson@gmail.com>
 Daniel James <dnljms@gmail.com>
@@ -21,13 +23,12 @@ John Jozwiak <jjozwiak@codeaurora.org>
 Kun Zhang <zhangk@codeaurora.org>
 Matt Hanselman <mjhanselman@gmail.com>
 Martyn Capewell <martyn.capewell@arm.com>
+Michael Smith <mike@w3.org>
 Paolo Giarrusso <p.giarrusso@gmail.com>
 Patrick Gansterer <paroga@paroga.com>
 Rafal Krypa <rafal@krypa.net>
 Rene Rebe <rene@exactcode.de>
 Rodolph Perfetta <rodolph.perfetta@arm.com>
 Ryan Dahl <coldredlemur@gmail.com>
 Subrato K De <subratokde@codeaurora.org>
-Burcu Dogan <burcujdogan@gmail.com>
 Vlad Burlik <vladbph@gmail.com>
-

deps/v8/ChangeLog

@@ -1,3 +1,21 @@
+2010-09-15: Version 2.4.4
+
+        Fix bug with hangs on very large sparse arrays.
+
+        Try harder to free up memory when running out of space.
+
+        Add heap snapshots to JSON format to API.
+
+        Recalibrate benchmarks.
+
+
+2010-09-13: Version 2.4.3
+
+        Made Date.parse properly handle TZ offsets (issue 857).
+
+        Performance improvements on all platforms.
+
+
 2010-09-08: Version 2.4.2
 
         Fixed GC crash bug.

deps/v8/benchmarks/crypto.js

@@ -31,7 +31,7 @@
 
 
 // The code has been adapted for use as a benchmark by Google.
-var Crypto = new BenchmarkSuite('Crypto', 110465, [
+var Crypto = new BenchmarkSuite('Crypto', 266181, [
   new Benchmark("Encrypt", encrypt),
   new Benchmark("Decrypt", decrypt)
 ]);

deps/v8/benchmarks/deltablue.js

@@ -23,7 +23,7 @@
 // more like a JavaScript program.
 
 
-var DeltaBlue = new BenchmarkSuite('DeltaBlue', 30282, [
+var DeltaBlue = new BenchmarkSuite('DeltaBlue', 66118, [
   new Benchmark('DeltaBlue', deltaBlue)
 ]);
 

deps/v8/benchmarks/earley-boyer.js

@@ -1,7 +1,7 @@
 // This file is automatically generated by scheme2js, except for the
 // benchmark harness code at the beginning and end of the file.
 
-var EarleyBoyer = new BenchmarkSuite('EarleyBoyer', 280581, [
+var EarleyBoyer = new BenchmarkSuite('EarleyBoyer', 666463, [
   new Benchmark("Earley", function () { BgL_earleyzd2benchmarkzd2(); }),
   new Benchmark("Boyer", function () { BgL_nboyerzd2benchmarkzd2(); })
 ]);

deps/v8/benchmarks/raytrace.js

@@ -8,7 +8,7 @@
 // untouched. This file also contains a copy of parts of the Prototype
 // JavaScript framework which is used by the ray tracer.
 
-var RayTrace = new BenchmarkSuite('RayTrace', 533115, [
+var RayTrace = new BenchmarkSuite('RayTrace', 739989, [
   new Benchmark('RayTrace', renderScene)
 ]);
 

deps/v8/benchmarks/regexp.js

@@ -35,7 +35,7 @@
 // letters in the data are encoded using ROT13 in a way that does not
 // affect how the regexps match their input.
 
-var RegRxp = new BenchmarkSuite('RegExp', 601250, [
+var RegRxp = new BenchmarkSuite('RegExp', 910985, [
   new Benchmark("RegExp", runRegExpBenchmark)
 ]);
 

deps/v8/benchmarks/richards.js

@@ -35,7 +35,7 @@
 // Martin Richards.
 
 
-var Richards = new BenchmarkSuite('Richards', 20687, [
+var Richards = new BenchmarkSuite('Richards', 35302, [
   new Benchmark("Richards", runRichards)
 ]);
 

deps/v8/benchmarks/splay.js

@@ -33,7 +33,7 @@
 // also has to deal with a lot of changes to the large tree object
 // graph.
 
-var Splay = new BenchmarkSuite('Splay', 21915, [
+var Splay = new BenchmarkSuite('Splay', 81491, [
   new Benchmark("Splay", SplayRun, SplaySetup, SplayTearDown)
 ]);
 

deps/v8/include/v8-profiler.h

@@ -323,7 +323,10 @@ class V8EXPORT HeapSnapshot {
   enum Type {
     kFull = 0,       // Heap snapshot with all instances and references.
     kAggregated = 1  // Snapshot doesn't contain individual heap entries,
-                     //instead they are grouped by constructor name.
+                     // instead they are grouped by constructor name.
+  };
+  enum SerializationFormat {
+    kJSON = 0  // See format description near 'Serialize' method.
   };
 
   /** Returns heap snapshot type. */
@@ -343,6 +346,30 @@ class V8EXPORT HeapSnapshot {
    * of the same type can be compared.
    */
   const HeapSnapshotsDiff* CompareWith(const HeapSnapshot* snapshot) const;
+
+  /**
+   * Prepare a serialized representation of the snapshot. The result
+   * is written into the stream provided in chunks of specified size.
+   * The total length of the serialized snapshot is unknown in
+   * advance, it is can be roughly equal to JS heap size (that means,
+   * it can be really big - tens of megabytes).
+   *
+   * For the JSON format, heap contents are represented as an object
+   * with the following structure:
+   *
+   *  {
+   *    snapshot: {title: "...", uid: nnn},
+   *    nodes: [
+   *      meta-info (JSON string),
+   *      nodes themselves
+   *    ],
+   *    strings: [strings]
+   *  }
+   *
+   * Outgoing node links are stored after each node. Nodes reference strings
+   * and other nodes by their indexes in corresponding arrays.
+   */
+  void Serialize(OutputStream* stream, SerializationFormat format) const;
 };
 
 

deps/v8/include/v8.h

@@ -3196,6 +3196,34 @@ class V8EXPORT Locker {
 };
 
 
+/**
+ * An interface for exporting data from V8, using "push" model.
+ */
+class V8EXPORT OutputStream {
+public:
+  enum OutputEncoding {
+    kAscii = 0  // 7-bit ASCII.
+  };
+  enum WriteResult {
+    kContinue = 0,
+    kAbort = 1
+  };
+  virtual ~OutputStream() {}
+  /** Notify about the end of stream. */
+  virtual void EndOfStream() = 0;
+  /** Get preferred output chunk size. Called only once. */
+  virtual int GetChunkSize() { return 1024; }
+  /** Get preferred output encoding. Called only once. */
+  virtual OutputEncoding GetOutputEncoding() { return kAscii; }
+  /**
+   * Writes the next chunk of snapshot data into the stream. Writing
+   * can be stopped by returning kAbort as function result. EndOfStream
+   * will not be called in case writing was aborted.
+   */
+  virtual WriteResult WriteAsciiChunk(char* data, int size) = 0;
+};
+
+
 
 // --- I m p l e m e n t a t i o n ---
 

deps/v8/src/api.cc

@@ -4739,6 +4739,23 @@ const HeapSnapshotsDiff* HeapSnapshot::CompareWith(
 }
 
 
+void HeapSnapshot::Serialize(OutputStream* stream,
+                             HeapSnapshot::SerializationFormat format) const {
+  IsDeadCheck("v8::HeapSnapshot::Serialize");
+  ApiCheck(format == kJSON,
+           "v8::HeapSnapshot::Serialize",
+           "Unknown serialization format");
+  ApiCheck(stream->GetOutputEncoding() == OutputStream::kAscii,
+           "v8::HeapSnapshot::Serialize",
+           "Unsupported output encoding");
+  ApiCheck(stream->GetChunkSize() > 0,
+           "v8::HeapSnapshot::Serialize",
+           "Invalid stream chunk size");
+  i::HeapSnapshotJSONSerializer serializer(ToInternal(this));
+  serializer.Serialize(stream);
+}
+
+
 int HeapProfiler::GetSnapshotsCount() {
   IsDeadCheck("v8::HeapProfiler::GetSnapshotsCount");
   return i::HeapProfiler::GetSnapshotsCount();