Long live Qt!

1 files changed, 234 insertions, 0 deletions

diff --git a/src/3rdparty/webkit/JavaScriptCore/runtime/ExceptionHelpers.cpp b/src/3rdparty/webkit/JavaScriptCore/runtime/ExceptionHelpers.cpp
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+++ b/src/3rdparty/webkit/JavaScriptCore/runtime/ExceptionHelpers.cpp
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+/*
+ * Copyright (C) 2008, 2009 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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "ExceptionHelpers.h"
+
+#include "CodeBlock.h"
+#include "CallFrame.h"
+#include "JSObject.h"
+#include "JSNotAnObject.h"
+#include "Interpreter.h"
+#include "Nodes.h"
+
+namespace JSC {
+
+static void substitute(UString& string, const UString& substring)
+{
+    int position = string.find("%s");
+    ASSERT(position != -1);
+    UString newString = string.substr(0, position);
+    newString.append(substring);
+    newString.append(string.substr(position + 2));
+    string = newString;
+}
+
+class InterruptedExecutionError : public JSObject {
+public:
+    InterruptedExecutionError(JSGlobalData* globalData)
+        : JSObject(globalData->interruptedExecutionErrorStructure)
+    {
+    }
+
+    virtual bool isWatchdogException() const { return true; }
+};
+
+JSValuePtr createInterruptedExecutionException(JSGlobalData* globalData)
+{
+    return new (globalData) InterruptedExecutionError(globalData);
+}
+
+JSValuePtr createError(ExecState* exec, ErrorType e, const char* msg)
+{
+    return Error::create(exec, e, msg, -1, -1, 0);
+}
+
+JSValuePtr createError(ExecState* exec, ErrorType e, const char* msg, const Identifier& label)
+{
+    UString message = msg;
+    substitute(message, label.ustring());
+    return Error::create(exec, e, message, -1, -1, 0);
+}
+
+JSValuePtr createError(ExecState* exec, ErrorType e, const char* msg, JSValuePtr v)
+{
+    UString message = msg;
+    substitute(message, v->toString(exec));
+    return Error::create(exec, e, message, -1, -1, 0);
+}
+
+JSValuePtr createStackOverflowError(ExecState* exec)
+{
+    return createError(exec, RangeError, "Maximum call stack size exceeded.");
+}
+
+JSValuePtr createUndefinedVariableError(ExecState* exec, const Identifier& ident, unsigned bytecodeOffset, CodeBlock* codeBlock)
+{
+    int startOffset = 0;
+    int endOffset = 0;
+    int divotPoint = 0;
+    int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
+    UString message = "Can't find variable: ";
+    message.append(ident.ustring());
+    JSObject* exception = Error::create(exec, ReferenceError, message, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
+    exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
+    return exception;
+}
+    
+bool isStrWhiteSpace(UChar c);
+
+static UString createErrorMessage(ExecState* exec, CodeBlock* codeBlock, int, int expressionStart, int expressionStop, JSValuePtr value, UString error)
+{
+    if (!expressionStop || expressionStart > codeBlock->source()->length()) {
+        UString errorText = value->toString(exec);
+        errorText.append(" is ");
+        errorText.append(error);
+        return errorText;
+    }
+
+    UString errorText = "Result of expression ";
+    
+    if (expressionStart < expressionStop) {
+        errorText.append('\'');
+        errorText.append(codeBlock->source()->getRange(expressionStart, expressionStop));
+        errorText.append("' [");
+        errorText.append(value->toString(exec));
+        errorText.append("] is ");
+    } else {
+        // No range information, so give a few characters of context
+        const UChar* data = codeBlock->source()->data();
+        int dataLength = codeBlock->source()->length();
+        int start = expressionStart;
+        int stop = expressionStart;
+        // Get up to 20 characters of context to the left and right of the divot, clamping to the line.
+        // then strip whitespace.
+        while (start > 0 && (expressionStart - start < 20) && data[start - 1] != '\n')
+            start--;
+        while (start < (expressionStart - 1) && isStrWhiteSpace(data[start]))
+            start++;
+        while (stop < dataLength && (stop - expressionStart < 20) && data[stop] != '\n')
+            stop++;
+        while (stop > expressionStart && isStrWhiteSpace(data[stop]))
+            stop--;
+        errorText.append("near '...");
+        errorText.append(codeBlock->source()->getRange(start, stop));
+        errorText.append("...' [");
+        errorText.append(value->toString(exec));
+        errorText.append("] is ");
+    }
+    errorText.append(error);
+    errorText.append(".");
+    return errorText;
+}
+
+JSObject* createInvalidParamError(ExecState* exec, const char* op, JSValuePtr value, unsigned bytecodeOffset, CodeBlock* codeBlock)
+{
+    UString message = "not a valid argument for '";
+    message.append(op);
+    message.append("'");
+    
+    int startOffset = 0;
+    int endOffset = 0;
+    int divotPoint = 0;
+    int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
+    UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint, divotPoint + endOffset, value, message);
+    JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
+    exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
+    return exception;
+}
+
+JSObject* createNotAConstructorError(ExecState* exec, JSValuePtr value, unsigned bytecodeOffset, CodeBlock* codeBlock)
+{
+    int startOffset = 0;
+    int endOffset = 0;
+    int divotPoint = 0;
+    int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
+
+    // We're in a "new" expression, so we need to skip over the "new.." part
+    int startPoint = divotPoint - (startOffset ? startOffset - 4 : 0); // -4 for "new "
+    const UChar* data = codeBlock->source()->data();
+    while (startPoint < divotPoint && isStrWhiteSpace(data[startPoint]))
+        startPoint++;
+    
+    UString errorMessage = createErrorMessage(exec, codeBlock, line, startPoint, divotPoint, value, "not a constructor");
+    JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
+    exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
+    return exception;
+}
+
+JSValuePtr createNotAFunctionError(ExecState* exec, JSValuePtr value, unsigned bytecodeOffset, CodeBlock* codeBlock)
+{
+    int startOffset = 0;
+    int endOffset = 0;
+    int divotPoint = 0;
+    int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
+    UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint - startOffset, divotPoint, value, "not a function");
+    JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());    
+    exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
+    return exception;
+}
+
+JSNotAnObjectErrorStub* createNotAnObjectErrorStub(ExecState* exec, bool isNull)
+{
+    return new (exec) JSNotAnObjectErrorStub(exec, isNull);
+}
+
+JSObject* createNotAnObjectError(ExecState* exec, JSNotAnObjectErrorStub* error, unsigned bytecodeOffset, CodeBlock* codeBlock)
+{
+    // Both op_construct and op_instanceof require a use of op_get_by_id to get
+    // the prototype property from an object. The exception messages for exceptions
+    // thrown by these instances op_get_by_id need to reflect this.
+    OpcodeID followingOpcodeID;
+    if (codeBlock->getByIdExceptionInfoForBytecodeOffset(exec, bytecodeOffset, followingOpcodeID)) {
+        ASSERT(followingOpcodeID == op_construct || followingOpcodeID == op_instanceof);
+        if (followingOpcodeID == op_construct)
+            return createNotAConstructorError(exec, error->isNull() ? jsNull() : jsUndefined(), bytecodeOffset, codeBlock);
+        return createInvalidParamError(exec, "instanceof", error->isNull() ? jsNull() : jsUndefined(), bytecodeOffset, codeBlock);
+    }
+
+    int startOffset = 0;
+    int endOffset = 0;
+    int divotPoint = 0;
+    int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
+    UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint - startOffset, divotPoint, error->isNull() ? jsNull() : jsUndefined(), "not an object");
+    JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
+    exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
+    exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
+    return exception;
+}
+
+} // namespace JSC