Imported WebKit commit 75bb2fc5882d2e1b3d5572c2961507996cbca5e3 (http://svn.webkit.org/repository/webkit/trunk@104681)

1 files changed, 72 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/jit/JITExceptions.cpp b/Source/JavaScriptCore/jit/JITExceptions.cpp
new file mode 100644
index 000000000..24baca41b
--- /dev/null
+++ b/Source/JavaScriptCore/jit/JITExceptions.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2012 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 "JITExceptions.h"
+
+#include "CallFrame.h"
+#include "CodeBlock.h"
+#include "Interpreter.h"
+#include "JSGlobalData.h"
+#include "JSValue.h"
+
+#if ENABLE(ASSEMBLER)
+
+namespace JSC {
+
+ExceptionHandler genericThrow(JSGlobalData* globalData, ExecState* callFrame, JSValue exceptionValue, unsigned vPCIndex)
+{
+    ASSERT(exceptionValue);
+
+    globalData->exception = JSValue();
+    HandlerInfo* handler = globalData->interpreter->throwException(callFrame, exceptionValue, vPCIndex); // This may update callFrame & exceptionValue!
+    globalData->exception = exceptionValue;
+
+    void* catchRoutine;
+    Instruction* catchPCForInterpreter = 0;
+    if (handler) {
+        catchRoutine = handler->nativeCode.executableAddress();
+        if (callFrame->codeBlock()->hasInstructions())
+            catchPCForInterpreter = &callFrame->codeBlock()->instructions()[handler->target];
+    } else
+        catchRoutine = FunctionPtr(ctiOpThrowNotCaught).value();
+    
+    globalData->callFrameForThrow = callFrame;
+    globalData->targetMachinePCForThrow = catchRoutine;
+    globalData->targetInterpreterPCForThrow = catchPCForInterpreter;
+    
+    ASSERT(catchRoutine);
+    ExceptionHandler exceptionHandler = { catchRoutine, callFrame };
+    return exceptionHandler;
+}
+
+ExceptionHandler jitThrow(JSGlobalData* globalData, ExecState* callFrame, JSValue exceptionValue, ReturnAddressPtr faultLocation)
+{
+    return genericThrow(globalData, callFrame, exceptionValue, callFrame->codeBlock()->bytecodeOffset(faultLocation));
+}
+
+}
+
+#endif