1 files changed, 120 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/ftl/FTLOSRExit.cpp b/Source/JavaScriptCore/ftl/FTLOSRExit.cpp
new file mode 100644
index 000000000..a9cd3b90d
--- /dev/null
+++ b/Source/JavaScriptCore/ftl/FTLOSRExit.cpp
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2013, 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 "FTLOSRExit.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "AirGenerationContext.h"
+#include "B3StackmapGenerationParams.h"
+#include "B3StackmapValue.h"
+#include "CodeBlock.h"
+#include "DFGBasicBlock.h"
+#include "DFGNode.h"
+#include "FTLExitArgument.h"
+#include "FTLJITCode.h"
+#include "FTLLocation.h"
+#include "FTLState.h"
+#include "JSCInlines.h"
+
+namespace JSC { namespace FTL {
+
+using namespace B3;
+using namespace DFG;
+
+OSRExitDescriptor::OSRExitDescriptor(
+    DataFormat profileDataFormat, MethodOfGettingAValueProfile valueProfile,
+    unsigned numberOfArguments, unsigned numberOfLocals)
+    : m_profileDataFormat(profileDataFormat)
+    , m_valueProfile(valueProfile)
+    , m_values(numberOfArguments, numberOfLocals)
+{
+}
+
+void OSRExitDescriptor::validateReferences(const TrackedReferences& trackedReferences)
+{
+    for (unsigned i = m_values.size(); i--;)
+        m_values[i].validateReferences(trackedReferences);
+    
+    for (ExitTimeObjectMaterialization* materialization : m_materializations)
+        materialization->validateReferences(trackedReferences);
+}
+
+RefPtr<OSRExitHandle> OSRExitDescriptor::emitOSRExit(
+    State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin, CCallHelpers& jit,
+    const StackmapGenerationParams& params, unsigned offset)
+{
+    RefPtr<OSRExitHandle> handle =
+        prepareOSRExitHandle(state, exitKind, nodeOrigin, params, offset);
+    handle->emitExitThunk(state, jit);
+    return handle;
+}
+
+RefPtr<OSRExitHandle> OSRExitDescriptor::emitOSRExitLater(
+    State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin,
+    const StackmapGenerationParams& params, unsigned offset)
+{
+    RefPtr<OSRExitHandle> handle =
+        prepareOSRExitHandle(state, exitKind, nodeOrigin, params, offset);
+    params.addLatePath(
+        [handle, &state] (CCallHelpers& jit) {
+            handle->emitExitThunk(state, jit);
+        });
+    return handle;
+}
+
+RefPtr<OSRExitHandle> OSRExitDescriptor::prepareOSRExitHandle(
+    State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin,
+    const StackmapGenerationParams& params, unsigned offset)
+{
+    unsigned index = state.jitCode->osrExit.size();
+    OSRExit& exit = state.jitCode->osrExit.alloc(
+        this, exitKind, nodeOrigin.forExit, nodeOrigin.semantic);
+    RefPtr<OSRExitHandle> handle = adoptRef(new OSRExitHandle(index, exit));
+    for (unsigned i = offset; i < params.size(); ++i)
+        exit.m_valueReps.append(params[i]);
+    exit.m_valueReps.shrinkToFit();
+    return handle;
+}
+
+OSRExit::OSRExit(
+    OSRExitDescriptor* descriptor,
+    ExitKind exitKind, CodeOrigin codeOrigin, CodeOrigin codeOriginForExitProfile)
+    : OSRExitBase(exitKind, codeOrigin, codeOriginForExitProfile)
+    , m_descriptor(descriptor)
+{
+}
+
+CodeLocationJump OSRExit::codeLocationForRepatch(CodeBlock* ftlCodeBlock) const
+{
+    UNUSED_PARAM(ftlCodeBlock);
+    return m_patchableJump;
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+