webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 73 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGOSRExit.cpp b/Source/JavaScriptCore/dfg/DFGOSRExit.cpp
new file mode 100644
index 000000000..8b4d67ace
--- /dev/null
+++ b/Source/JavaScriptCore/dfg/DFGOSRExit.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2011, 2013 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 "DFGOSRExit.h"
+
+#if ENABLE(DFG_JIT)
+
+#include "AssemblyHelpers.h"
+#include "DFGGraph.h"
+#include "DFGSpeculativeJIT.h"
+#include "JSCInlines.h"
+
+namespace JSC { namespace DFG {
+
+OSRExit::OSRExit(ExitKind kind, JSValueSource jsValueSource, MethodOfGettingAValueProfile valueProfile, SpeculativeJIT* jit, unsigned streamIndex, unsigned recoveryIndex)
+    : OSRExitBase(kind, jit->m_codeOriginForExitTarget, jit->m_codeOriginForExitProfile)
+    , m_jsValueSource(jsValueSource)
+    , m_valueProfile(valueProfile)
+    , m_patchableCodeOffset(0)
+    , m_recoveryIndex(recoveryIndex)
+    , m_streamIndex(streamIndex)
+{
+    ASSERT(m_codeOrigin.isSet());
+}
+
+void OSRExit::setPatchableCodeOffset(MacroAssembler::PatchableJump check)
+{
+    m_patchableCodeOffset = check.m_jump.m_label.m_offset;
+}
+
+MacroAssembler::Jump OSRExit::getPatchableCodeOffsetAsJump() const
+{
+    return MacroAssembler::Jump(AssemblerLabel(m_patchableCodeOffset));
+}
+
+CodeLocationJump OSRExit::codeLocationForRepatch(CodeBlock* dfgCodeBlock) const
+{
+    return CodeLocationJump(dfgCodeBlock->jitCode()->dataAddressAtOffset(m_patchableCodeOffset));
+}
+
+void OSRExit::correctJump(LinkBuffer& linkBuffer)
+{
+    MacroAssembler::Label label;
+    label.m_label.m_offset = m_patchableCodeOffset;
+    m_patchableCodeOffset = linkBuffer.offsetOf(label);
+}
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)