/*
- * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2012 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
#include "Identifier.h"
#include "CallFrame.h"
-#include <new> // for placement new
-#include <string.h> // for strlen
+#include "JSObject.h"
+#include "JSScope.h"
+#include "NumericStrings.h"
+#include "JSCInlines.h"
+#include <new>
+#include <string.h>
#include <wtf/Assertions.h>
#include <wtf/FastMalloc.h>
#include <wtf/HashSet.h>
+#include <wtf/text/ASCIIFastPath.h>
+#include <wtf/text/StringHash.h>
using WTF::ThreadSpecific;
namespace JSC {
-typedef HashMap<const char*, RefPtr<UString::Rep>, PtrHash<const char*> > LiteralIdentifierTable;
-
-class IdentifierTable : public FastAllocBase {
-public:
- ~IdentifierTable()
- {
- HashSet<UString::Rep*>::iterator end = m_table.end();
- for (HashSet<UString::Rep*>::iterator iter = m_table.begin(); iter != end; ++iter)
- (*iter)->setIsIdentifier(false);
- }
-
- std::pair<HashSet<UString::Rep*>::iterator, bool> add(UString::Rep* value)
- {
- std::pair<HashSet<UString::Rep*>::iterator, bool> result = m_table.add(value);
- (*result.first)->setIsIdentifier(true);
- return result;
- }
-
- template<typename U, typename V>
- std::pair<HashSet<UString::Rep*>::iterator, bool> add(U value)
- {
- std::pair<HashSet<UString::Rep*>::iterator, bool> result = m_table.add<U, V>(value);
- (*result.first)->setIsIdentifier(true);
- return result;
- }
-
- void remove(UString::Rep* r) { m_table.remove(r); }
-
- LiteralIdentifierTable& literalTable() { return m_literalTable; }
-
-private:
- HashSet<UString::Rep*> m_table;
- LiteralIdentifierTable m_literalTable;
-};
-
-IdentifierTable* createIdentifierTable()
-{
- return new IdentifierTable;
-}
-
-void deleteIdentifierTable(IdentifierTable* table)
+Ref<StringImpl> Identifier::add(VM* vm, const char* c)
{
- delete table;
-}
-
-bool Identifier::equal(const UString::Rep* r, const char* s)
-{
- int length = r->size();
- const UChar* d = r->data();
- for (int i = 0; i != length; ++i)
- if (d[i] != (unsigned char)s[i])
- return false;
- return s[length] == 0;
-}
-
-bool Identifier::equal(const UString::Rep* r, const UChar* s, int length)
-{
- if (r->size() != length)
- return false;
- const UChar* d = r->data();
- for (int i = 0; i != length; ++i)
- if (d[i] != s[i])
- return false;
- return true;
-}
-
-struct CStringTranslator {
- static unsigned hash(const char* c)
- {
- return UString::Rep::computeHash(c);
- }
-
- static bool equal(UString::Rep* r, const char* s)
- {
- return Identifier::equal(r, s);
- }
-
- static void translate(UString::Rep*& location, const char* c, unsigned hash)
- {
- size_t length = strlen(c);
- UChar* d;
- UString::Rep* r = UString::Rep::createUninitialized(length, d).releaseRef();
- for (size_t i = 0; i != length; i++)
- d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
- r->setHash(hash);
- location = r;
- }
-};
-
-PassRefPtr<UString::Rep> Identifier::add(JSGlobalData* globalData, const char* c)
-{
- if (!c) {
- UString::Rep::null().hash();
- return &UString::Rep::null();
- }
- if (!c[0]) {
- UString::Rep::empty().hash();
- return &UString::Rep::empty();
- }
+ ASSERT(c);
+ ASSERT(c[0]);
if (!c[1])
- return add(globalData, globalData->smallStrings.singleCharacterStringRep(static_cast<unsigned char>(c[0])));
-
- IdentifierTable& identifierTable = *globalData->identifierTable;
- LiteralIdentifierTable& literalIdentifierTable = identifierTable.literalTable();
-
- const LiteralIdentifierTable::iterator& iter = literalIdentifierTable.find(c);
- if (iter != literalIdentifierTable.end())
- return iter->second;
+ return *vm->smallStrings.singleCharacterStringRep(c[0]);
- pair<HashSet<UString::Rep*>::iterator, bool> addResult = identifierTable.add<const char*, CStringTranslator>(c);
-
- // If the string is newly-translated, then we need to adopt it.
- // The boolean in the pair tells us if that is so.
- RefPtr<UString::Rep> addedString = addResult.second ? adoptRef(*addResult.first) : *addResult.first;
-
- literalIdentifierTable.add(c, addedString.get());
-
- return addedString.release();
+ return *AtomicStringImpl::add(c);
}
-PassRefPtr<UString::Rep> Identifier::add(ExecState* exec, const char* c)
+Ref<StringImpl> Identifier::add(ExecState* exec, const char* c)
{
- return add(&exec->globalData(), c);
+ return add(&exec->vm(), c);
}
-struct UCharBuffer {
- const UChar* s;
- unsigned int length;
-};
-
-struct UCharBufferTranslator {
- static unsigned hash(const UCharBuffer& buf)
- {
- return UString::Rep::computeHash(buf.s, buf.length);
- }
-
- static bool equal(UString::Rep* str, const UCharBuffer& buf)
- {
- return Identifier::equal(str, buf.s, buf.length);
- }
-
- static void translate(UString::Rep*& location, const UCharBuffer& buf, unsigned hash)
- {
- UChar* d;
- UString::Rep* r = UString::Rep::createUninitialized(buf.length, d).releaseRef();
- for (unsigned i = 0; i != buf.length; i++)
- d[i] = buf.s[i];
- r->setHash(hash);
- location = r;
- }
-};
-
-PassRefPtr<UString::Rep> Identifier::add(JSGlobalData* globalData, const UChar* s, int length)
+Ref<StringImpl> Identifier::add8(VM* vm, const UChar* s, int length)
{
if (length == 1) {
UChar c = s[0];
- if (c <= 0xFF)
- return add(globalData, globalData->smallStrings.singleCharacterStringRep(c));
+ ASSERT(c <= 0xff);
+ if (canUseSingleCharacterString(c))
+ return *vm->smallStrings.singleCharacterStringRep(c);
}
- if (!length) {
- UString::Rep::empty().hash();
- return &UString::Rep::empty();
- }
- UCharBuffer buf = {s, length};
- pair<HashSet<UString::Rep*>::iterator, bool> addResult = globalData->identifierTable->add<UCharBuffer, UCharBufferTranslator>(buf);
+ if (!length)
+ return *StringImpl::empty();
- // If the string is newly-translated, then we need to adopt it.
- // The boolean in the pair tells us if that is so.
- return addResult.second ? adoptRef(*addResult.first) : *addResult.first;
+ return *AtomicStringImpl::add(s, length);
}
-PassRefPtr<UString::Rep> Identifier::add(ExecState* exec, const UChar* s, int length)
+Identifier Identifier::from(ExecState* exec, unsigned value)
{
- return add(&exec->globalData(), s, length);
-}
-
-PassRefPtr<UString::Rep> Identifier::addSlowCase(JSGlobalData* globalData, UString::Rep* r)
-{
- ASSERT(!r->isIdentifier());
- if (r->size() == 1) {
- UChar c = r->data()[0];
- if (c <= 0xFF)
- r = globalData->smallStrings.singleCharacterStringRep(c);
- if (r->isIdentifier()) {
-#ifndef NDEBUG
- checkSameIdentifierTable(globalData, r);
-#endif
- return r;
- }
- }
- if (!r->size()) {
- UString::Rep::empty().hash();
- return &UString::Rep::empty();
- }
- return *globalData->identifierTable->add(r).first;
+ return Identifier(exec, exec->vm().numericStrings.add(value));
}
-PassRefPtr<UString::Rep> Identifier::addSlowCase(ExecState* exec, UString::Rep* r)
+Identifier Identifier::from(ExecState* exec, int value)
{
- return addSlowCase(&exec->globalData(), r);
+ return Identifier(exec, exec->vm().numericStrings.add(value));
}
-void Identifier::remove(UString::Rep* r)
+Identifier Identifier::from(ExecState* exec, double value)
{
- currentIdentifierTable()->remove(r);
+ return Identifier(exec, exec->vm().numericStrings.add(value));
}
-#ifndef NDEBUG
-
-void Identifier::checkSameIdentifierTable(ExecState* exec, UString::Rep*)
+Identifier Identifier::from(VM* vm, unsigned value)
{
- ASSERT_UNUSED(exec, exec->globalData().identifierTable == currentIdentifierTable());
+ return Identifier(vm, vm->numericStrings.add(value));
}
-void Identifier::checkSameIdentifierTable(JSGlobalData* globalData, UString::Rep*)
+Identifier Identifier::from(VM* vm, int value)
{
- ASSERT_UNUSED(globalData, globalData->identifierTable == currentIdentifierTable());
+ return Identifier(vm, vm->numericStrings.add(value));
}
-#else
-
-void Identifier::checkSameIdentifierTable(ExecState*, UString::Rep*)
+Identifier Identifier::from(VM* vm, double value)
{
+ return Identifier(vm, vm->numericStrings.add(value));
}
-void Identifier::checkSameIdentifierTable(JSGlobalData*, UString::Rep*)
+void Identifier::dump(PrintStream& out) const
{
+ if (impl())
+ out.print(impl());
+ else
+ out.print("<null identifier>");
}
-#endif
-
-ThreadSpecific<ThreadIdentifierTableData>* g_identifierTableSpecific = 0;
-ThreadIdentifierTableData* g_identifierTableMain = 0;
-
-#if ENABLE(JSC_MULTIPLE_THREADS)
+#ifndef NDEBUG
-pthread_once_t createIdentifierTableSpecificOnce = PTHREAD_ONCE_INIT;
-static void createIdentifierTableSpecificCallback()
+void Identifier::checkCurrentAtomicStringTable(VM* vm)
{
- ASSERT(!g_identifierTableSpecific);
- g_identifierTableSpecific = new ThreadSpecific<ThreadIdentifierTableData>();
- ASSERT(!g_identifierTableMain);
- g_identifierTableMain = new ThreadIdentifierTableData();
+ // Check the identifier table accessible through the threadspecific matches the
+ // vm's identifier table.
+ ASSERT_UNUSED(vm, vm->atomicStringTable() == wtfThreadData().atomicStringTable());
}
-void createIdentifierTableSpecific()
+
+void Identifier::checkCurrentAtomicStringTable(ExecState* exec)
{
- pthread_once(&createIdentifierTableSpecificOnce, createIdentifierTableSpecificCallback);
- ASSERT(g_identifierTableSpecific);
- ASSERT(g_identifierTableMain);
+ checkCurrentAtomicStringTable(&exec->vm());
}
-#else
+#else
-void createIdentifierTableSpecific()
-{
- ASSERT(!g_identifierTableSpecific);
- g_identifierTableSpecific = new ThreadSpecific<ThreadIdentifierTableData>();
- ASSERT(!g_identifierTableMain);
- g_identifierTableMain = new ThreadIdentifierTableData();
-}
+// These only exists so that our exports are the same for debug and release builds.
+// This would be an RELEASE_ASSERT_NOT_REACHED(), but we're in NDEBUG only code here!
+NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentAtomicStringTable(VM*) { CRASH(); }
+NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentAtomicStringTable(ExecState*) { CRASH(); }
#endif
projects / apple / javascriptcore.git / blobdiff