1 /* 2 * Copyright (C) 2008, 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "config.h" 30 #include "ExceptionHelpers.h" 31 32 #include "CodeBlock.h" 33 #include "CallFrame.h" 34 #include "JSGlobalObjectFunctions.h" 35 #include "JSObject.h" 36 #include "JSNotAnObject.h" 37 #include "Interpreter.h" 38 #include "Nodes.h" 39 40 namespace JSC { 41 42 class InterruptedExecutionError : public JSObject { 43 public: 44 InterruptedExecutionError(JSGlobalData* globalData) 45 : JSObject(globalData->interruptedExecutionErrorStructure) 46 { 47 } 48 49 virtual bool isWatchdogException() const { return true; } 50 51 virtual UString toString(ExecState*) const { return "JavaScript execution exceeded timeout."; } 52 }; 53 54 JSValue createInterruptedExecutionException(JSGlobalData* globalData) 55 { 56 return new (globalData) InterruptedExecutionError(globalData); 57 } 58 59 static JSValue createError(ExecState* exec, ErrorType e, const char* msg) 60 { 61 return Error::create(exec, e, msg, -1, -1, UString()); 62 } 63 64 JSValue createStackOverflowError(ExecState* exec) 65 { 66 return createError(exec, RangeError, "Maximum call stack size exceeded."); 67 } 68 69 JSValue createTypeError(ExecState* exec, const char* message) 70 { 71 return createError(exec, TypeError, message); 72 } 73 74 JSValue createUndefinedVariableError(ExecState* exec, const Identifier& ident, unsigned bytecodeOffset, CodeBlock* codeBlock) 75 { 76 int startOffset = 0; 77 int endOffset = 0; 78 int divotPoint = 0; 79 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset); 80 JSObject* exception = Error::create(exec, ReferenceError, makeString("Can't find variable: ", ident.ustring()), line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL()); 81 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete); 82 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete); 83 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete); 84 return exception; 85 } 86 87 static UString createErrorMessage(ExecState* exec, CodeBlock* codeBlock, int, int expressionStart, int expressionStop, JSValue value, UString error) 88 { 89 if (!expressionStop || expressionStart > codeBlock->source()->length()) 90 return makeString(value.toString(exec), " is ", error); 91 if (expressionStart < expressionStop) 92 return makeString("Result of expression '", codeBlock->source()->getRange(expressionStart, expressionStop), "' [", value.toString(exec), "] is ", error, "."); 93 94 // No range information, so give a few characters of context 95 const UChar* data = codeBlock->source()->data(); 96 int dataLength = codeBlock->source()->length(); 97 int start = expressionStart; 98 int stop = expressionStart; 99 // Get up to 20 characters of context to the left and right of the divot, clamping to the line. 100 // then strip whitespace. 101 while (start > 0 && (expressionStart - start < 20) && data[start - 1] != '\n') 102 start--; 103 while (start < (expressionStart - 1) && isStrWhiteSpace(data[start])) 104 start++; 105 while (stop < dataLength && (stop - expressionStart < 20) && data[stop] != '\n') 106 stop++; 107 while (stop > expressionStart && isStrWhiteSpace(data[stop])) 108 stop--; 109 return makeString("Result of expression near '...", codeBlock->source()->getRange(start, stop), "...' [", value.toString(exec), "] is ", error, "."); 110 } 111 112 JSObject* createInvalidParamError(ExecState* exec, const char* op, JSValue value, unsigned bytecodeOffset, CodeBlock* codeBlock) 113 { 114 int startOffset = 0; 115 int endOffset = 0; 116 int divotPoint = 0; 117 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset); 118 UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint, divotPoint + endOffset, value, makeString("not a valid argument for '", op, "'")); 119 JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL()); 120 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete); 121 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete); 122 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete); 123 return exception; 124 } 125 126 JSObject* createNotAConstructorError(ExecState* exec, JSValue value, unsigned bytecodeOffset, CodeBlock* codeBlock) 127 { 128 int startOffset = 0; 129 int endOffset = 0; 130 int divotPoint = 0; 131 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset); 132 133 // We're in a "new" expression, so we need to skip over the "new.." part 134 int startPoint = divotPoint - (startOffset ? startOffset - 4 : 0); // -4 for "new " 135 const UChar* data = codeBlock->source()->data(); 136 while (startPoint < divotPoint && isStrWhiteSpace(data[startPoint])) 137 startPoint++; 138 139 UString errorMessage = createErrorMessage(exec, codeBlock, line, startPoint, divotPoint, value, "not a constructor"); 140 JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL()); 141 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete); 142 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete); 143 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete); 144 return exception; 145 } 146 147 JSValue createNotAFunctionError(ExecState* exec, JSValue value, unsigned bytecodeOffset, CodeBlock* codeBlock) 148 { 149 int startOffset = 0; 150 int endOffset = 0; 151 int divotPoint = 0; 152 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset); 153 UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint - startOffset, divotPoint, value, "not a function"); 154 JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL()); 155 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete); 156 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete); 157 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete); 158 return exception; 159 } 160 161 JSNotAnObjectErrorStub* createNotAnObjectErrorStub(ExecState* exec, bool isNull) 162 { 163 return new (exec) JSNotAnObjectErrorStub(exec, isNull); 164 } 165 166 JSObject* createNotAnObjectError(ExecState* exec, JSNotAnObjectErrorStub* error, unsigned bytecodeOffset, CodeBlock* codeBlock) 167 { 168 // Both op_construct and op_instanceof require a use of op_get_by_id to get 169 // the prototype property from an object. The exception messages for exceptions 170 // thrown by these instances op_get_by_id need to reflect this. 171 OpcodeID followingOpcodeID; 172 if (codeBlock->getByIdExceptionInfoForBytecodeOffset(exec, bytecodeOffset, followingOpcodeID)) { 173 ASSERT(followingOpcodeID == op_construct || followingOpcodeID == op_instanceof); 174 if (followingOpcodeID == op_construct) 175 return createNotAConstructorError(exec, error->isNull() ? jsNull() : jsUndefined(), bytecodeOffset, codeBlock); 176 return createInvalidParamError(exec, "instanceof", error->isNull() ? jsNull() : jsUndefined(), bytecodeOffset, codeBlock); 177 } 178 179 int startOffset = 0; 180 int endOffset = 0; 181 int divotPoint = 0; 182 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset); 183 UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint - startOffset, divotPoint, error->isNull() ? jsNull() : jsUndefined(), "not an object"); 184 JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL()); 185 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete); 186 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete); 187 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete); 188 return exception; 189 } 190 191 JSValue throwOutOfMemoryError(ExecState* exec) 192 { 193 return throwError(exec, GeneralError, "Out of memory"); 194 } 195 196 } // namespace JSC 197
