Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>

1 files changed, 77 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGAdaptiveStructureWatchpoint.cpp b/Source/JavaScriptCore/dfg/DFGAdaptiveStructureWatchpoint.cpp
new file mode 100644
index 000000000..0854c56b0
--- /dev/null
+++ b/Source/JavaScriptCore/dfg/DFGAdaptiveStructureWatchpoint.cpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2015 Apple 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. 
+ */
+
+#include "config.h"
+#include "DFGAdaptiveStructureWatchpoint.h"
+
+#if ENABLE(DFG_JIT)
+
+#include "CodeBlock.h"
+#include "JSCInlines.h"
+
+namespace JSC { namespace DFG {
+
+AdaptiveStructureWatchpoint::AdaptiveStructureWatchpoint(
+    const ObjectPropertyCondition& key,
+    CodeBlock* codeBlock)
+    : m_key(key)
+    , m_codeBlock(codeBlock)
+{
+    RELEASE_ASSERT(key.watchingRequiresStructureTransitionWatchpoint());
+    RELEASE_ASSERT(!key.watchingRequiresReplacementWatchpoint());
+}
+
+void AdaptiveStructureWatchpoint::install()
+{
+    RELEASE_ASSERT(m_key.isWatchable());
+    
+    m_key.object()->structure()->addTransitionWatchpoint(this);
+}
+
+void AdaptiveStructureWatchpoint::fireInternal(const FireDetail& detail)
+{
+    if (m_key.isWatchable(PropertyCondition::EnsureWatchability)) {
+        install();
+        return;
+    }
+    
+    if (DFG::shouldDumpDisassembly()) {
+        dataLog(
+            "Firing watchpoint ", RawPointer(this), " (", m_key, ") on ", *m_codeBlock, "\n");
+    }
+    
+    StringPrintStream out;
+    out.print("Adaptation of ", m_key, " failed: ", detail);
+    
+    StringFireDetail stringDetail(out.toCString().data());
+    
+    m_codeBlock->jettison(
+        Profiler::JettisonDueToUnprofiledWatchpoint, CountReoptimization, &stringDetail);
+}
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+