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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 "JSGlobalObjectFunctions.h"
#include "JSObject.h"
#include "JSNotAnObject.h"
#include "Interpreter.h"
#include "Nodes.h"
namespace JSC {
class InterruptedExecutionError : public JSObject {
public:
InterruptedExecutionError(JSGlobalData* globalData)
: JSObject(globalData->interruptedExecutionErrorStructure)
{
}
virtual bool isWatchdogException() const { return true; }
virtual UString toString(ExecState*) const { return "JavaScript execution exceeded timeout."; }
};
JSValue createInterruptedExecutionException(JSGlobalData* globalData)
{
return new (globalData) InterruptedExecutionError(globalData);
}
static JSValue createError(ExecState* exec, ErrorType e, const char* msg)
{
return Error::create(exec, e, msg, -1, -1, 0);
}
JSValue createStackOverflowError(ExecState* exec)
{
return createError(exec, RangeError, "Maximum call stack size exceeded.");
}
JSValue createTypeError(ExecState* exec, const char* message)
{
return createError(exec, TypeError, message);
}
JSValue 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);
JSObject* exception = Error::create(exec, ReferenceError, makeString("Can't find variable: ", ident.ustring()), line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->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;
}
static UString createErrorMessage(ExecState* exec, CodeBlock* codeBlock, int, int expressionStart, int expressionStop, JSValue value, UString error)
{
if (!expressionStop || expressionStart > codeBlock->source()->length())
return makeString(value.toString(exec), " is ", error);
if (expressionStart < expressionStop)
return makeString("Result of expression '", codeBlock->source()->getRange(expressionStart, expressionStop), "' [", value.toString(exec), "] is ", error, ".");
// 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--;
return makeString("Result of expression near '...", codeBlock->source()->getRange(start, stop), "...' [", value.toString(exec), "] is ", error, ".");
}
JSObject* createInvalidParamError(ExecState* exec, const char* op, JSValue 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, divotPoint + endOffset, value, makeString("not a valid argument for '", op, "'"));
JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->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, JSValue 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->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->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;
}
JSValue createNotAFunctionError(ExecState* exec, JSValue 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->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->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->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->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
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