webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 81 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/interpreter/CLoopStackInlines.h b/Source/JavaScriptCore/interpreter/CLoopStackInlines.h
new file mode 100644
index 000000000..44e385bdc
--- /dev/null
+++ b/Source/JavaScriptCore/interpreter/CLoopStackInlines.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2012-2014, 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. 
+ */
+
+#pragma once
+
+#if !ENABLE(JIT)
+
+#include "CLoopStack.h"
+#include "CallFrame.h"
+#include "CodeBlock.h"
+#include "VM.h"
+
+namespace JSC {
+
+inline bool CLoopStack::ensureCapacityFor(Register* newTopOfStack)
+{
+    Register* newEnd = newTopOfStack - 1;
+    if (newEnd >= m_end)
+        return true;
+    return grow(newTopOfStack);
+}
+
+inline Register* CLoopStack::topOfFrameFor(CallFrame* frame)
+{
+    if (UNLIKELY(!frame))
+        return baseOfStack();
+    return frame->topOfFrame() - 1;
+}
+
+inline Register* CLoopStack::topOfStack()
+{
+    return topOfFrameFor(m_topCallFrame);
+}
+
+inline void CLoopStack::shrink(Register* newTopOfStack)
+{
+    Register* newEnd = newTopOfStack - 1;
+    if (newEnd >= m_end)
+        return;
+    setCLoopStackLimit(newTopOfStack);
+    // Note: Clang complains of an unresolved linkage to maxExcessCapacity if
+    // invoke std::max() with it as an argument. To work around this, we first
+    // assign the constant to a local variable, and use the local instead.
+    ptrdiff_t maxExcessCapacity = CLoopStack::maxExcessCapacity;
+    ptrdiff_t maxExcessInRegisters = std::max(maxExcessCapacity, m_softReservedZoneSizeInRegisters);
+    if (m_end == baseOfStack() && (highAddress() - m_commitTop) >= maxExcessInRegisters)
+        releaseExcessCapacity();
+}
+
+inline void CLoopStack::setCLoopStackLimit(Register* newTopOfStack)
+{
+    Register* newEnd = newTopOfStack - 1;
+    m_end = newEnd;
+    m_vm.setCLoopStackLimit(newTopOfStack);
+}
+
+} // namespace JSC
+
+#endif // !ENABLE(JIT)