webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 79 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/ftl/FTLLazySlowPath.cpp b/Source/JavaScriptCore/ftl/FTLLazySlowPath.cpp
new file mode 100644
index 000000000..9bdc06da8
--- /dev/null
+++ b/Source/JavaScriptCore/ftl/FTLLazySlowPath.cpp
@@ -0,0 +1,79 @@
+/*
+ * 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. 
+ */
+
+#include "config.h"
+#include "FTLLazySlowPath.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "FTLSlowPathCall.h"
+#include "LinkBuffer.h"
+
+namespace JSC { namespace FTL {
+
+LazySlowPath::LazySlowPath(
+    CodeLocationJump patchableJump, CodeLocationLabel done,
+    CodeLocationLabel exceptionTarget,
+    const RegisterSet& usedRegisters, CallSiteIndex callSiteIndex, RefPtr<Generator> generator
+    )
+    : m_patchableJump(patchableJump)
+    , m_done(done)
+    , m_exceptionTarget(exceptionTarget)
+    , m_usedRegisters(usedRegisters)
+    , m_callSiteIndex(callSiteIndex)
+    , m_generator(generator)
+{
+}
+
+LazySlowPath::~LazySlowPath()
+{
+}
+
+void LazySlowPath::generate(CodeBlock* codeBlock)
+{
+    RELEASE_ASSERT(!m_stub);
+
+    VM& vm = *codeBlock->vm();
+
+    CCallHelpers jit(&vm, codeBlock);
+    GenerationParams params;
+    CCallHelpers::JumpList exceptionJumps;
+    params.exceptionJumps = m_exceptionTarget ? &exceptionJumps : nullptr;
+    params.lazySlowPath = this;
+
+    m_generator->run(jit, params);
+
+    LinkBuffer linkBuffer(vm, jit, codeBlock, JITCompilationMustSucceed);
+    linkBuffer.link(params.doneJumps, m_done);
+    if (m_exceptionTarget)
+        linkBuffer.link(exceptionJumps, m_exceptionTarget);
+    m_stub = FINALIZE_CODE_FOR(codeBlock, linkBuffer, ("Lazy slow path call stub"));
+
+    MacroAssembler::repatchJump(m_patchableJump, CodeLocationLabel(m_stub.code()));
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)