v8/src/factory.h

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// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
// OWNER OR 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.
#ifndef V8_FACTORY_H_
#define V8_FACTORY_H_
#include "heap.h"
namespace v8 { namespace internal {
// Interface for handle based allocation.
class Factory : public AllStatic {
public:
// Allocate a new fixed array.
static Handle<FixedArray> NewFixedArray(
int size,
PretenureFlag pretenure = NOT_TENURED);
static Handle<DescriptorArray> NewDescriptorArray(int number_of_descriptors);
static Handle<String> LookupSymbol(Vector<const char> str);
static Handle<String> LookupAsciiSymbol(const char* str) {
return LookupSymbol(CStrVector(str));
}
// String creation functions. Most of the string creation functions take
// a Heap::PretenureFlag argument to optionally request that they be
// allocated in the old generation. The pretenure flag defaults to
// DONT_TENURE.
//
// Creates a new String object. There are two String encodings: ASCII and
// two byte. One should choose between the three string factory functions
// based on the encoding of the string buffer that the string is
// initialized from.
// - ...FromAscii initializes the string from a buffer that is ASCII
// encoded (it does not check that the buffer is ASCII encoded) and
// the result will be ASCII encoded.
// - ...FromUtf8 initializes the string from a buffer that is UTF-8
// encoded. If the characters are all single-byte characters, the
// result will be ASCII encoded, otherwise it will converted to two
// byte.
// - ...FromTwoByte initializes the string from a buffer that is two
// byte encoded. If the characters are all single-byte characters,
// the result will be converted to ASCII, otherwise it will be left as
// two byte.
//
// ASCII strings are pretenured when used as keys in the SourceCodeCache.
static Handle<String> NewStringFromAscii(
Vector<const char> str,
PretenureFlag pretenure = NOT_TENURED);
// UTF8 strings are pretenured when used for regexp literal patterns and
// flags in the parser.
static Handle<String> NewStringFromUtf8(
Vector<const char> str,
PretenureFlag pretenure = NOT_TENURED);
static Handle<String> NewStringFromTwoByte(Vector<const uc16> str);
// Allocates and partially initializes a TwoByte String. The characters of
// the string are uninitialized. Currently used in regexp code only, where
// they are pretenured.
static Handle<String> NewRawTwoByteString(
int length,
PretenureFlag pretenure = NOT_TENURED);
// Create a new cons string object which consists of a pair of strings.
static Handle<String> NewConsString(Handle<String> first,
Handle<String> second);
// Create a new sliced string object which represents a substring of a
// backing string.
static Handle<String> NewStringSlice(Handle<String> str, int begin, int end);
// Creates a new external String object. There are two String encodings
// in the system: ASCII and two byte. Unlike other String types, it does
// not make sense to have a UTF-8 factory function for external strings,
// because we cannot change the underlying buffer.
static Handle<String> NewExternalStringFromAscii(
ExternalAsciiString::Resource* resource);
static Handle<String> NewExternalStringFromTwoByte(
ExternalTwoByteString::Resource* resource);
// Create a global (but otherwise uninitialized) context.
static Handle<Context> NewGlobalContext();
// Create a function context.
static Handle<Context> NewFunctionContext(int length,
Handle<JSFunction> closure);
// Create a 'with' context.
static Handle<Context> NewWithContext(Handle<Context> previous,
Handle<JSObject> extension);
// Return the Symbol maching the passed in string.
static Handle<String> SymbolFromString(Handle<String> value);
// Allocate a new struct. The struct is pretenured (allocated directly in
// the old generation).
static Handle<Struct> NewStruct(InstanceType type);
static Handle<AccessorInfo> NewAccessorInfo();
static Handle<Script> NewScript(Handle<String> source);
// Proxies are pretenured when allocated by the bootstrapper.
static Handle<Proxy> NewProxy(Address addr,
PretenureFlag pretenure = NOT_TENURED);
// Allocate a new proxy. The proxy is pretenured (allocated directly in
// the old generation).
static Handle<Proxy> NewProxy(const AccessorDescriptor* proxy);
static Handle<ByteArray> NewByteArray(int length);
static Handle<Map> NewMap(InstanceType type, int instance_size);
static Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function);
static Handle<Map> CopyMap(Handle<Map> map);
static Handle<Map> CopyMapDropTransitions(Handle<Map> map);
static Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
// Numbers (eg, literals) are pretenured by the parser.
static Handle<Object> NewNumber(double value,
PretenureFlag pretenure = NOT_TENURED);
static Handle<Object> NewNumberFromInt(int value);
// These objects are used by the api to create env-independent data
// structures in the heap.
static Handle<JSObject> NewNeanderObject();
static Handle<JSObject> NewArgumentsObject(Handle<Object> callee, int length);
// JS objects are pretenured when allocated by the bootstrapper and
// runtime.
static Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
PretenureFlag pretenure = NOT_TENURED);
// Allocate a JS object representing an object literal. The object is
// pretenured (allocated directly in the old generation).
static Handle<JSObject> NewObjectLiteral(int expected_number_of_properties);
// Allocate a JS array representing an array literal. The array is
// pretenured (allocated directly in the old generation).
static Handle<JSArray> NewArrayLiteral(int length);
// JS arrays are pretenured when allocated by the parser.
static Handle<JSArray> NewJSArray(int init_length,
PretenureFlag pretenure = NOT_TENURED);
static Handle<JSArray> NewJSArrayWithElements(
Handle<FixedArray> elements,
PretenureFlag pretenure = NOT_TENURED);
static Handle<JSFunction> NewFunction(Handle<String> name,
Handle<Object> prototype);
static Handle<JSFunction> NewFunction(Handle<Object> super, bool is_global);
static Handle<JSFunction> NewFunctionFromBoilerplate(
Handle<JSFunction> boilerplate,
Handle<Context> context);
static Handle<Code> NewCode(const CodeDesc& desc, ScopeInfo<>* sinfo,
Code::Flags flags);
static Handle<Code> CopyCode(Handle<Code> code);
static Handle<Object> ToObject(Handle<Object> object,
Handle<Context> global_context);
// Interface for creating error objects.
static Handle<Object> NewError(const char* maker, const char* type,
Handle<JSArray> args);
static Handle<Object> NewError(const char* maker, const char* type,
Vector< Handle<Object> > args);
static Handle<Object> NewError(const char* type,
Vector< Handle<Object> > args);
static Handle<Object> NewError(Handle<String> message);
static Handle<Object> NewError(const char* constructor,
Handle<String> message);
static Handle<Object> NewTypeError(const char* type,
Vector< Handle<Object> > args);
static Handle<Object> NewTypeError(Handle<String> message);
static Handle<Object> NewRangeError(const char* type,
Vector< Handle<Object> > args);
static Handle<Object> NewRangeError(Handle<String> message);
static Handle<Object> NewSyntaxError(const char* type, Handle<JSArray> args);
static Handle<Object> NewSyntaxError(Handle<String> message);
static Handle<Object> NewReferenceError(const char* type,
Vector< Handle<Object> > args);
static Handle<Object> NewReferenceError(Handle<String> message);
static Handle<Object> NewEvalError(const char* type,
Vector< Handle<Object> > args);
static Handle<JSFunction> NewFunction(Handle<String> name,
InstanceType type,
int instance_size,
Handle<Code> code,
bool force_initial_map);
static Handle<JSFunction> NewFunctionBoilerplate(Handle<String> name,
int number_of_literals,
bool contains_array_literal,
Handle<Code> code);
static Handle<JSFunction> NewFunctionBoilerplate(Handle<String> name);
static Handle<JSFunction> NewFunction(Handle<Map> function_map,
Handle<SharedFunctionInfo> shared, Handle<Object> prototype);
static Handle<JSFunction> NewFunctionWithPrototype(Handle<String> name,
InstanceType type,
int instance_size,
Handle<JSObject> prototype,
Handle<Code> code,
bool force_initial_map);
static Handle<DescriptorArray> CopyAppendProxyDescriptor(
Handle<DescriptorArray> array,
Handle<String> key,
Handle<Object> value,
PropertyAttributes attributes);
static Handle<JSFunction> CreateApiFunction(Handle<FunctionTemplateInfo> data,
bool is_global = false);
static Handle<JSFunction> InstallMembers(Handle<JSFunction> function);
// Installs interceptors on the instance. 'desc' is a function template,
// and instance is an object instance created by the function of this
// function tempalte.
static void ConfigureInstance(Handle<FunctionTemplateInfo> desc,
Handle<JSObject> instance,
bool* pending_exception);
#define ROOT_ACCESSOR(type, name) \
static Handle<type> name() { return Handle<type>(&Heap::name##_); }
ROOT_LIST(ROOT_ACCESSOR)
#undef ROOT_ACCESSOR_ACCESSOR
#define SYMBOL_ACCESSOR(name, str) \
static Handle<String> name() { return Handle<String>(&Heap::name##_); }
SYMBOL_LIST(SYMBOL_ACCESSOR)
#undef SYMBOL_ACCESSOR
static Handle<SharedFunctionInfo> NewSharedFunctionInfo(Handle<String> name);
static Handle<Dictionary> DictionaryAtNumberPut(Handle<Dictionary>,
uint32_t key,
Handle<Object> value);
static Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
private:
static Handle<JSFunction> NewFunctionHelper(Handle<String> name,
Handle<Object> prototype);
static Handle<DescriptorArray> CopyAppendCallbackDescriptors(
Handle<DescriptorArray> array,
Handle<Object> descriptors);
static Handle<JSFunction> BaseNewFunctionFromBoilerplate(
Handle<JSFunction> boilerplate,
Handle<Map> function_map);
};
} } // namespace v8::internal
#endif // V8_FACTORY_H_