1 files changed, 170 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/ftl/FTLJITCode.cpp b/Source/JavaScriptCore/ftl/FTLJITCode.cpp
new file mode 100644
index 000000000..65e6c0052
--- /dev/null
+++ b/Source/JavaScriptCore/ftl/FTLJITCode.cpp
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2013, 2015-2016 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 "FTLJITCode.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "FTLState.h"
+
+namespace JSC { namespace FTL {
+
+using namespace B3;
+
+JITCode::JITCode()
+    : JSC::JITCode(FTLJIT)
+{
+}
+
+JITCode::~JITCode()
+{
+    if (FTL::shouldDumpDisassembly()) {
+        dataLog("Destroying FTL JIT code at ");
+        CommaPrinter comma;
+        dataLog(comma, m_b3Code);
+        dataLog(comma, m_arityCheckEntrypoint);
+    }
+}
+
+void JITCode::initializeB3Code(CodeRef b3Code)
+{
+    m_b3Code = b3Code;
+}
+
+void JITCode::initializeB3Byproducts(std::unique_ptr<OpaqueByproducts> byproducts)
+{
+    m_b3Byproducts = WTFMove(byproducts);
+}
+
+void JITCode::initializeAddressForCall(CodePtr address)
+{
+    m_addressForCall = address;
+}
+
+void JITCode::initializeArityCheckEntrypoint(CodeRef entrypoint)
+{
+    m_arityCheckEntrypoint = entrypoint;
+}
+
+JITCode::CodePtr JITCode::addressForCall(ArityCheckMode arityCheck)
+{
+    switch (arityCheck) {
+    case ArityCheckNotRequired:
+        return m_addressForCall;
+    case MustCheckArity:
+        return m_arityCheckEntrypoint.code();
+    }
+    RELEASE_ASSERT_NOT_REACHED();
+    return CodePtr();
+}
+
+void* JITCode::executableAddressAtOffset(size_t offset)
+{
+    return reinterpret_cast<char*>(m_addressForCall.executableAddress()) + offset;
+}
+
+void* JITCode::dataAddressAtOffset(size_t)
+{
+    // We can't patch FTL code, yet. Even if we did, it's not clear that we would do so
+    // through this API.
+    RELEASE_ASSERT_NOT_REACHED();
+    return 0;
+}
+
+unsigned JITCode::offsetOf(void*)
+{
+    // We currently don't have visibility into the FTL code.
+    RELEASE_ASSERT_NOT_REACHED();
+    return 0;
+}
+
+size_t JITCode::size()
+{
+    // We don't know the size of FTL code, yet. Make a wild guess. This is mostly used for
+    // GC load estimates.
+    return 1000;
+}
+
+bool JITCode::contains(void*)
+{
+    // We have no idea what addresses the FTL code contains, yet.
+    RELEASE_ASSERT_NOT_REACHED();
+    return false;
+}
+
+JITCode* JITCode::ftl()
+{
+    return this;
+}
+
+DFG::CommonData* JITCode::dfgCommon()
+{
+    return &common;
+}
+
+void JITCode::validateReferences(const TrackedReferences& trackedReferences)
+{
+    common.validateReferences(trackedReferences);
+    
+    for (OSRExit& exit : osrExit)
+        exit.m_descriptor->validateReferences(trackedReferences);
+}
+
+RegisterSet JITCode::liveRegistersToPreserveAtExceptionHandlingCallSite(CodeBlock*, CallSiteIndex callSiteIndex)
+{
+    for (OSRExit& exit : osrExit) {
+        if (exit.m_exceptionHandlerCallSiteIndex.bits() == callSiteIndex.bits()) {
+            RELEASE_ASSERT(exit.isExceptionHandler());
+            RELEASE_ASSERT(exit.isGenericUnwindHandler());
+            return ValueRep::usedRegisters(exit.m_valueReps);
+        }
+    }
+    return RegisterSet();
+}
+
+Optional<CodeOrigin> JITCode::findPC(CodeBlock* codeBlock, void* pc)
+{
+    for (OSRExit& exit : osrExit) {
+        if (ExecutableMemoryHandle* handle = exit.m_code.executableMemory()) {
+            if (handle->start() <= pc && pc < handle->end())
+                return Optional<CodeOrigin>(exit.m_codeOriginForExitProfile);
+        }
+    }
+
+    for (std::unique_ptr<LazySlowPath>& lazySlowPath : lazySlowPaths) {
+        if (ExecutableMemoryHandle* handle = lazySlowPath->stub().executableMemory()) {
+            if (handle->start() <= pc && pc < handle->end())
+                return Optional<CodeOrigin>(codeBlock->codeOrigin(lazySlowPath->callSiteIndex()));
+        }
+    }
+
+    return Nullopt;
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+