runtime/ExceptionHelpers.cpp

   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 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 "ErrorHandlingScope.h"
  35 #include "ErrorInstance.h"
  36 #include "JSGlobalObjectFunctions.h"
  37 #include "JSObject.h"
  38 #include "JSNotAnObject.h"
  39 #include "Interpreter.h"
  40 #include "Nodes.h"
  41 #include "JSCInlines.h"
  42
  43 namespace JSC {
  44
  45 STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(TerminatedExecutionError);
  46
  47 const ClassInfo TerminatedExecutionError::s_info = { "TerminatedExecutionError", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(TerminatedExecutionError) };
  48
  49 JSValue TerminatedExecutionError::defaultValue(const JSObject*, ExecState* exec, PreferredPrimitiveType hint)
  50 {
  51     if (hint == PreferString)
  52         return jsNontrivialString(exec, String(ASCIILiteral("JavaScript execution terminated.")));
  53     return JSValue(PNaN);
  54 }
  55
  56 JSObject* createTerminatedExecutionException(VM* vm)
  57 {
  58     return TerminatedExecutionError::create(*vm);
  59 }
  60
  61 bool isTerminatedExecutionException(JSObject* object)
  62 {
  63     return object->inherits(TerminatedExecutionError::info());
  64 }
  65
  66 bool isTerminatedExecutionException(JSValue value)
  67 {
  68     return value.inherits(TerminatedExecutionError::info());
  69 }
  70
  71
  72 JSObject* createStackOverflowError(ExecState* exec)
  73 {
  74     return createRangeError(exec, ASCIILiteral("Maximum call stack size exceeded."));
  75 }
  76
  77 JSObject* createStackOverflowError(JSGlobalObject* globalObject)
  78 {
  79     return createRangeError(globalObject, ASCIILiteral("Maximum call stack size exceeded."));
  80 }
  81
  82 JSObject* createUndefinedVariableError(ExecState* exec, const Identifier& ident)
  83 {
  84
  85     if (ident.impl()->isEmptyUnique()) {
  86         String message(makeString("Can't find private variable: @", exec->propertyNames().getPublicName(ident).string()));
  87         return createReferenceError(exec, message);
  88     }
  89     String message(makeString("Can't find variable: ", ident.string()));
  90     return createReferenceError(exec, message);
  91 }
  92
  93 JSString* errorDescriptionForValue(ExecState* exec, JSValue v)
  94 {
  95     VM& vm = exec->vm();
  96     if (v.isNull())
  97         return vm.smallStrings.nullString();
  98     if (v.isUndefined())
  99         return vm.smallStrings.undefinedString();
 100     if (v.isInt32())
 101         return jsString(&vm, vm.numericStrings.add(v.asInt32()));
 102     if (v.isDouble())
 103         return jsString(&vm, vm.numericStrings.add(v.asDouble()));
 104     if (v.isTrue())
 105         return vm.smallStrings.trueString();
 106     if (v.isFalse())
 107         return vm.smallStrings.falseString();
 108     if (v.isString())
 109         return jsCast<JSString*>(v.asCell());
 110     if (v.isObject()) {
 111         CallData callData;
 112         JSObject* object = asObject(v);
 113         if (object->methodTable()->getCallData(object, callData) != CallTypeNone)
 114             return vm.smallStrings.functionString();
 115         return jsString(exec, object->methodTable()->className(object));
 116     }
 117
 118     // The JSValue should never be empty, so this point in the code should never be reached.
 119     ASSERT_NOT_REACHED();
 120     return vm.smallStrings.emptyString();
 121 }
 122
 123 JSObject* createError(ExecState* exec, ErrorFactory errorFactory, JSValue value, const String& message)
 124 {
 125     String errorMessage = makeString(errorDescriptionForValue(exec, value)->value(exec), " ", message);
 126     JSObject* exception = errorFactory(exec, errorMessage);
 127     ASSERT(exception->isErrorInstance());
 128     static_cast<ErrorInstance*>(exception)->setAppendSourceToMessage();
 129     return exception;
 130 }
 131
 132 JSObject* createInvalidParameterError(ExecState* exec, const char* op, JSValue value)
 133 {
 134     return createError(exec, createTypeError, value, makeString("is not a valid argument for '", op, "'"));
 135 }
 136
 137 JSObject* createNotAConstructorError(ExecState* exec, JSValue value)
 138 {
 139     return createError(exec, createTypeError, value, "is not a constructor");
 140 }
 141
 142 JSObject* createNotAFunctionError(ExecState* exec, JSValue value)
 143 {
 144     return createError(exec, createTypeError, value, "is not a function");
 145 }
 146
 147 JSObject* createNotAnObjectError(ExecState* exec, JSValue value)
 148 {
 149     return createError(exec, createTypeError, value, "is not an object");
 150 }
 151
 152 JSObject* createErrorForInvalidGlobalAssignment(ExecState* exec, const String& propertyName)
 153 {
 154     return createReferenceError(exec, makeString("Strict mode forbids implicit creation of global property '", propertyName, "'"));
 155 }
 156
 157 JSObject* createOutOfMemoryError(JSGlobalObject* globalObject)
 158 {
 159     return createError(globalObject, ASCIILiteral("Out of memory"));
 160 }
 161
 162 JSObject* throwOutOfMemoryError(ExecState* exec)
 163 {
 164     return exec->vm().throwException(exec, createOutOfMemoryError(exec->lexicalGlobalObject()));
 165 }
 166
 167 JSObject* throwStackOverflowError(ExecState* exec)
 168 {
 169     VM& vm = exec->vm();
 170     ErrorHandlingScope errorScope(vm);
 171     return vm.throwException(exec, createStackOverflowError(exec));
 172 }
 173
 174 JSObject* throwTerminatedExecutionException(ExecState* exec)
 175 {
 176     VM& vm = exec->vm();
 177     ErrorHandlingScope errorScope(vm);
 178     return vm.throwException(exec, createTerminatedExecutionException(&vm));
 179 }
 180
 181 } // namespace JSC