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:
InterruptedExecutionError(JSGlobalData * globalData)44 InterruptedExecutionError(JSGlobalData* globalData)
45 : JSObject(globalData->interruptedExecutionErrorStructure)
46 {
47 }
48
isWatchdogException() const49 virtual bool isWatchdogException() const { return true; }
50 };
51
createInterruptedExecutionException(JSGlobalData * globalData)52 JSValuePtr createInterruptedExecutionException(JSGlobalData* globalData)
53 {
54 return new (globalData) InterruptedExecutionError(globalData);
55 }
56
createError(ExecState * exec,ErrorType e,const char * msg)57 static JSValuePtr createError(ExecState* exec, ErrorType e, const char* msg)
58 {
59 return Error::create(exec, e, msg, -1, -1, 0);
60 }
61
createStackOverflowError(ExecState * exec)62 JSValuePtr createStackOverflowError(ExecState* exec)
63 {
64 return createError(exec, RangeError, "Maximum call stack size exceeded.");
65 }
66
createUndefinedVariableError(ExecState * exec,const Identifier & ident,unsigned bytecodeOffset,CodeBlock * codeBlock)67 JSValuePtr createUndefinedVariableError(ExecState* exec, const Identifier& ident, unsigned bytecodeOffset, CodeBlock* codeBlock)
68 {
69 int startOffset = 0;
70 int endOffset = 0;
71 int divotPoint = 0;
72 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
73 UString message = "Can't find variable: ";
74 message.append(ident.ustring());
75 JSObject* exception = Error::create(exec, ReferenceError, message, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
76 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
77 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
78 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
79 return exception;
80 }
81
createErrorMessage(ExecState * exec,CodeBlock * codeBlock,int,int expressionStart,int expressionStop,JSValuePtr value,UString error)82 static UString createErrorMessage(ExecState* exec, CodeBlock* codeBlock, int, int expressionStart, int expressionStop, JSValuePtr value, UString error)
83 {
84 if (!expressionStop || expressionStart > codeBlock->source()->length()) {
85 UString errorText = value.toString(exec);
86 errorText.append(" is ");
87 errorText.append(error);
88 return errorText;
89 }
90
91 UString errorText = "Result of expression ";
92
93 if (expressionStart < expressionStop) {
94 errorText.append('\'');
95 errorText.append(codeBlock->source()->getRange(expressionStart, expressionStop));
96 errorText.append("' [");
97 errorText.append(value.toString(exec));
98 errorText.append("] is ");
99 } else {
100 // No range information, so give a few characters of context
101 const UChar* data = codeBlock->source()->data();
102 int dataLength = codeBlock->source()->length();
103 int start = expressionStart;
104 int stop = expressionStart;
105 // Get up to 20 characters of context to the left and right of the divot, clamping to the line.
106 // then strip whitespace.
107 while (start > 0 && (expressionStart - start < 20) && data[start - 1] != '\n')
108 start--;
109 while (start < (expressionStart - 1) && isStrWhiteSpace(data[start]))
110 start++;
111 while (stop < dataLength && (stop - expressionStart < 20) && data[stop] != '\n')
112 stop++;
113 while (stop > expressionStart && isStrWhiteSpace(data[stop]))
114 stop--;
115 errorText.append("near '...");
116 errorText.append(codeBlock->source()->getRange(start, stop));
117 errorText.append("...' [");
118 errorText.append(value.toString(exec));
119 errorText.append("] is ");
120 }
121 errorText.append(error);
122 errorText.append(".");
123 return errorText;
124 }
125
createInvalidParamError(ExecState * exec,const char * op,JSValuePtr value,unsigned bytecodeOffset,CodeBlock * codeBlock)126 JSObject* createInvalidParamError(ExecState* exec, const char* op, JSValuePtr value, unsigned bytecodeOffset, CodeBlock* codeBlock)
127 {
128 UString message = "not a valid argument for '";
129 message.append(op);
130 message.append("'");
131
132 int startOffset = 0;
133 int endOffset = 0;
134 int divotPoint = 0;
135 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
136 UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint, divotPoint + endOffset, value, message);
137 JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
138 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
139 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
140 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
141 return exception;
142 }
143
createNotAConstructorError(ExecState * exec,JSValuePtr value,unsigned bytecodeOffset,CodeBlock * codeBlock)144 JSObject* createNotAConstructorError(ExecState* exec, JSValuePtr value, unsigned bytecodeOffset, CodeBlock* codeBlock)
145 {
146 int startOffset = 0;
147 int endOffset = 0;
148 int divotPoint = 0;
149 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
150
151 // We're in a "new" expression, so we need to skip over the "new.." part
152 int startPoint = divotPoint - (startOffset ? startOffset - 4 : 0); // -4 for "new "
153 const UChar* data = codeBlock->source()->data();
154 while (startPoint < divotPoint && isStrWhiteSpace(data[startPoint]))
155 startPoint++;
156
157 UString errorMessage = createErrorMessage(exec, codeBlock, line, startPoint, divotPoint, value, "not a constructor");
158 JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
159 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
160 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
161 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
162 return exception;
163 }
164
createNotAFunctionError(ExecState * exec,JSValuePtr value,unsigned bytecodeOffset,CodeBlock * codeBlock)165 JSValuePtr createNotAFunctionError(ExecState* exec, JSValuePtr value, unsigned bytecodeOffset, CodeBlock* codeBlock)
166 {
167 int startOffset = 0;
168 int endOffset = 0;
169 int divotPoint = 0;
170 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
171 UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint - startOffset, divotPoint, value, "not a function");
172 JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
173 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
174 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
175 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
176 return exception;
177 }
178
createNotAnObjectErrorStub(ExecState * exec,bool isNull)179 JSNotAnObjectErrorStub* createNotAnObjectErrorStub(ExecState* exec, bool isNull)
180 {
181 return new (exec) JSNotAnObjectErrorStub(exec, isNull);
182 }
183
createNotAnObjectError(ExecState * exec,JSNotAnObjectErrorStub * error,unsigned bytecodeOffset,CodeBlock * codeBlock)184 JSObject* createNotAnObjectError(ExecState* exec, JSNotAnObjectErrorStub* error, unsigned bytecodeOffset, CodeBlock* codeBlock)
185 {
186 // Both op_construct and op_instanceof require a use of op_get_by_id to get
187 // the prototype property from an object. The exception messages for exceptions
188 // thrown by these instances op_get_by_id need to reflect this.
189 OpcodeID followingOpcodeID;
190 if (codeBlock->getByIdExceptionInfoForBytecodeOffset(exec, bytecodeOffset, followingOpcodeID)) {
191 ASSERT(followingOpcodeID == op_construct || followingOpcodeID == op_instanceof);
192 if (followingOpcodeID == op_construct)
193 return createNotAConstructorError(exec, error->isNull() ? jsNull() : jsUndefined(), bytecodeOffset, codeBlock);
194 return createInvalidParamError(exec, "instanceof", error->isNull() ? jsNull() : jsUndefined(), bytecodeOffset, codeBlock);
195 }
196
197 int startOffset = 0;
198 int endOffset = 0;
199 int divotPoint = 0;
200 int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
201 UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint - startOffset, divotPoint, error->isNull() ? jsNull() : jsUndefined(), "not an object");
202 JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerNode()->sourceID(), codeBlock->ownerNode()->sourceURL());
203 exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
204 exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
205 exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
206 return exception;
207 }
208
209 } // namespace JSC
210