1 files changed, 125 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/bytecode/DOMJITAccessCasePatchpointParams.cpp b/Source/JavaScriptCore/bytecode/DOMJITAccessCasePatchpointParams.cpp
new file mode 100644
index 000000000..790d9c03d
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+++ b/Source/JavaScriptCore/bytecode/DOMJITAccessCasePatchpointParams.cpp
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 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 "DOMJITAccessCasePatchpointParams.h"
+
+#include "LinkBuffer.h"
+#include "PolymorphicAccess.h"
+#include "StructureStubInfo.h"
+
+#if ENABLE(JIT)
+
+namespace JSC {
+
+template<typename JumpType, typename FunctionType, typename ResultType, typename... Arguments>
+class SlowPathCallGeneratorWithArguments : public DOMJITAccessCasePatchpointParams::SlowPathCallGenerator {
+public:
+    SlowPathCallGeneratorWithArguments(JumpType from, CCallHelpers::Label to, FunctionType function, ResultType result, std::tuple<Arguments...> arguments)
+        : m_from(from)
+        , m_to(to)
+        , m_function(function)
+        , m_result(result)
+        , m_arguments(arguments)
+    {
+    }
+
+    template<size_t... ArgumentsIndex>
+    CCallHelpers::JumpList generateImpl(AccessGenerationState& state, const RegisterSet& usedRegistersByPatchpoint, CCallHelpers& jit, std::index_sequence<ArgumentsIndex...>)
+    {
+        CCallHelpers::JumpList exceptions;
+        // We spill (1) the used registers by IC and (2) the used registers by DOMJIT::Patchpoint.
+        AccessGenerationState::SpillState spillState = state.preserveLiveRegistersToStackForCall(usedRegistersByPatchpoint);
+
+        jit.store32(
+            CCallHelpers::TrustedImm32(state.callSiteIndexForExceptionHandlingOrOriginal().bits()),
+            CCallHelpers::tagFor(static_cast<VirtualRegister>(CallFrameSlot::argumentCount)));
+
+        jit.makeSpaceOnStackForCCall();
+
+        // FIXME: Currently, we do not check any ARM EABI things here.
+        // But it is OK because a compile error happens when you pass JSValueRegs as an argument.
+        // https://bugs.webkit.org/show_bug.cgi?id=163099
+        jit.setupArgumentsWithExecState(std::get<ArgumentsIndex>(m_arguments)...);
+
+        CCallHelpers::Call operationCall = jit.call();
+        auto function = m_function;
+        jit.addLinkTask([=] (LinkBuffer& linkBuffer) {
+            linkBuffer.link(operationCall, FunctionPtr(function));
+        });
+
+        jit.setupResults(m_result);
+        jit.reclaimSpaceOnStackForCCall();
+
+        CCallHelpers::Jump noException = jit.emitExceptionCheck(CCallHelpers::InvertedExceptionCheck);
+
+        state.restoreLiveRegistersFromStackForCallWithThrownException(spillState);
+        exceptions.append(jit.jump());
+
+        noException.link(&jit);
+        RegisterSet dontRestore;
+        dontRestore.set(m_result);
+        state.restoreLiveRegistersFromStackForCall(spillState, dontRestore);
+
+        return exceptions;
+    }
+
+    CCallHelpers::JumpList generate(AccessGenerationState& state, const RegisterSet& usedRegistersByPatchpoint, CCallHelpers& jit) override
+    {
+        m_from.link(&jit);
+        CCallHelpers::JumpList exceptions = generateImpl(state, usedRegistersByPatchpoint, jit, std::make_index_sequence<std::tuple_size<std::tuple<Arguments...>>::value>());
+        jit.jump().linkTo(m_to, &jit);
+        return exceptions;
+    }
+
+protected:
+    JumpType m_from;
+    CCallHelpers::Label m_to;
+    FunctionType m_function;
+    ResultType m_result;
+    std::tuple<Arguments...> m_arguments;
+};
+
+#define JSC_DEFINE_CALL_OPERATIONS(OperationType, ResultType, ...) \
+    void DOMJITAccessCasePatchpointParams::addSlowPathCallImpl(CCallHelpers::JumpList from, CCallHelpers& jit, OperationType operation, ResultType result, std::tuple<__VA_ARGS__> args) \
+    { \
+        CCallHelpers::Label to = jit.label(); \
+        m_generators.append(std::make_unique<SlowPathCallGeneratorWithArguments<CCallHelpers::JumpList, OperationType, ResultType, __VA_ARGS__>>(from, to, operation, result, args)); \
+    } \
+
+DOMJIT_SLOW_PATH_CALLS(JSC_DEFINE_CALL_OPERATIONS)
+#undef JSC_DEFINE_CALL_OPERATIONS
+
+CCallHelpers::JumpList DOMJITAccessCasePatchpointParams::emitSlowPathCalls(AccessGenerationState& state, const RegisterSet& usedRegistersByPatchpoint, CCallHelpers& jit)
+{
+    CCallHelpers::JumpList exceptions;
+    for (auto& generator : m_generators)
+        exceptions.append(generator->generate(state, usedRegistersByPatchpoint, jit));
+    return exceptions;
+}
+
+}
+
+#endif