Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

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

1 files changed, 287 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/wasm/WASMFunctionSyntaxChecker.h b/Source/JavaScriptCore/wasm/WASMFunctionSyntaxChecker.h
new file mode 100644
index 000000000..edfe42808
--- /dev/null
+++ b/Source/JavaScriptCore/wasm/WASMFunctionSyntaxChecker.h
@@ -0,0 +1,287 @@
+/*
+ * 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.
+ */
+
+#ifndef WASMFunctionSyntaxChecker_h
+#define WASMFunctionSyntaxChecker_h
+
+#if ENABLE(WEBASSEMBLY)
+
+#define UNUSED 0
+
+namespace JSC {
+
+class WASMFunctionSyntaxChecker {
+public:
+    typedef int Expression;
+    typedef int Statement;
+    typedef int ExpressionList;
+    struct MemoryAddress {
+        MemoryAddress(void*) { }
+        MemoryAddress(int, uint32_t) { }
+    };
+    typedef int JumpTarget;
+    enum class JumpCondition { Zero, NonZero };
+
+    void startFunction(const Vector<WASMType>& arguments, uint32_t numberOfI32LocalVariables, uint32_t numberOfF32LocalVariables, uint32_t numberOfF64LocalVariables)
+    {
+        m_numberOfLocals = arguments.size() + numberOfI32LocalVariables + numberOfF32LocalVariables + numberOfF64LocalVariables;
+    }
+
+    void endFunction()
+    {
+        ASSERT(!m_tempStackTop);
+    }
+
+    int buildSetLocal(WASMOpKind opKind, uint32_t, int, WASMType)
+    {
+        if (opKind == WASMOpKind::Statement)
+            m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildSetGlobal(WASMOpKind opKind, uint32_t, int, WASMType)
+    {
+        if (opKind == WASMOpKind::Statement)
+            m_tempStackTop--;
+        return UNUSED;
+    }
+
+    void buildReturn(int, WASMExpressionType returnType)
+    {
+        if (returnType != WASMExpressionType::Void)
+            m_tempStackTop--;
+    }
+
+    int buildImmediateI32(uint32_t)
+    {
+        m_tempStackTop++;
+        updateTempStackHeight();
+        return UNUSED;
+    }
+
+    int buildImmediateF32(float)
+    {
+        m_tempStackTop++;
+        updateTempStackHeight();
+        return UNUSED;
+    }
+
+    int buildImmediateF64(double)
+    {
+        m_tempStackTop++;
+        updateTempStackHeight();
+        return UNUSED;
+    }
+
+    int buildGetLocal(uint32_t, WASMType)
+    {
+        m_tempStackTop++;
+        updateTempStackHeight();
+        return UNUSED;
+    }
+
+    int buildGetGlobal(uint32_t, WASMType)
+    {
+        m_tempStackTop++;
+        updateTempStackHeight();
+        return UNUSED;
+    }
+
+    int buildConvertType(int, WASMExpressionType, WASMExpressionType, WASMTypeConversion)
+    {
+        return UNUSED;
+    }
+
+    int buildLoad(const MemoryAddress&, WASMExpressionType, WASMMemoryType, MemoryAccessConversion)
+    {
+        return UNUSED;
+    }
+
+    int buildStore(WASMOpKind opKind, const MemoryAddress&, WASMExpressionType, WASMMemoryType, int)
+    {
+        m_tempStackTop -= 2;
+        if (opKind == WASMOpKind::Expression)
+            m_tempStackTop++;
+        return UNUSED;
+    }
+
+    int buildUnaryI32(int, WASMOpExpressionI32)
+    {
+        return UNUSED;
+    }
+
+    int buildUnaryF32(int, WASMOpExpressionF32)
+    {
+        return UNUSED;
+    }
+
+    int buildUnaryF64(int, WASMOpExpressionF64)
+    {
+        return UNUSED;
+    }
+
+    int buildBinaryI32(int, int, WASMOpExpressionI32)
+    {
+        m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildBinaryF32(int, int, WASMOpExpressionF32)
+    {
+        m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildBinaryF64(int, int, WASMOpExpressionF64)
+    {
+        m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildRelationalI32(int, int, WASMOpExpressionI32)
+    {
+        m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildRelationalF32(int, int, WASMOpExpressionI32)
+    {
+        m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildRelationalF64(int, int, WASMOpExpressionI32)
+    {
+        m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildMinOrMaxI32(int, int, WASMOpExpressionI32)
+    {
+        m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildMinOrMaxF64(int, int, WASMOpExpressionF64)
+    {
+        m_tempStackTop--;
+        return UNUSED;
+    }
+
+    int buildCallInternal(uint32_t, int, const WASMSignature& signature, WASMExpressionType returnType)
+    {
+        size_t argumentCount = signature.arguments.size();
+        updateTempStackHeightForCall(argumentCount);
+        m_tempStackTop -= argumentCount;
+        if (returnType != WASMExpressionType::Void) {
+            m_tempStackTop++;
+            updateTempStackHeight();
+        }
+        return UNUSED;
+    }
+
+    int buildCallImport(uint32_t, int, const WASMSignature& signature, WASMExpressionType returnType)
+    {
+        size_t argumentCount = signature.arguments.size();
+        updateTempStackHeightForCall(argumentCount);
+        m_tempStackTop -= argumentCount;
+        if (returnType != WASMExpressionType::Void) {
+            m_tempStackTop++;
+            updateTempStackHeight();
+        }
+        return UNUSED;
+    }
+
+    int buildCallIndirect(uint32_t, int, int, const WASMSignature& signature, WASMExpressionType returnType)
+    {
+        size_t argumentCount = signature.arguments.size();
+        updateTempStackHeightForCall(argumentCount);
+        m_tempStackTop -= argumentCount + 1;
+        if (returnType != WASMExpressionType::Void)
+            m_tempStackTop++;
+        return UNUSED;
+    }
+
+    void appendExpressionList(int&, int) { }
+
+    void discard(int)
+    {
+        m_tempStackTop--;
+    }
+
+    void linkTarget(const int&) { }
+    void jumpToTarget(const int&) { }
+    void jumpToTargetIf(JumpCondition, int, const int&)
+    {
+        m_tempStackTop--;
+    }
+
+    void startLoop() { }
+    void endLoop() { }
+    void startSwitch() { }
+    void endSwitch() { }
+    void startLabel() { }
+    void endLabel() { }
+
+    int breakTarget() { return UNUSED; }
+    int continueTarget() { return UNUSED; }
+    int breakLabelTarget(uint32_t) { return UNUSED; }
+    int continueLabelTarget(uint32_t) { return UNUSED; }
+
+    void buildSwitch(int, const Vector<int64_t>&, const Vector<int>&, const int&)
+    {
+        m_tempStackTop--;
+    }
+
+    unsigned stackHeight()
+    {
+        return m_numberOfLocals + m_tempStackHeight;
+    }
+
+private:
+    void updateTempStackHeight()
+    {
+        if (m_tempStackTop > m_tempStackHeight)
+            m_tempStackHeight = m_tempStackTop;
+    }
+
+    void updateTempStackHeightForCall(size_t argumentCount)
+    {
+        // Boxed arguments + this argument + call frame header + maximum padding.
+        m_tempStackTop += argumentCount + 1 + JSStack::CallFrameHeaderSize + 1;
+        updateTempStackHeight();
+        m_tempStackTop -= argumentCount + 1 + JSStack::CallFrameHeaderSize + 1;
+    }
+
+    unsigned m_numberOfLocals;
+    unsigned m_tempStackTop { 0 };
+    unsigned m_tempStackHeight { 0 };
+};
+
+} // namespace JSC
+
+#endif // ENABLE(WEBASSEMBLY)
+
+#endif // WASMFunctionSyntaxChecker_h