/*
- * Copyright (C) 2012 Apple Inc. All rights reserved.
+ * Copyright (C) 2012, 2014, 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 2. 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.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
#include "config.h"
#include "SymbolTable.h"
+#include "JSDestructibleObject.h"
+#include "JSCInlines.h"
+#include "SlotVisitorInlines.h"
+#include "TypeProfiler.h"
+
namespace JSC {
-const ClassInfo SharedSymbolTable::s_info = { "SharedSymbolTable", 0, 0, 0, CREATE_METHOD_TABLE(SharedSymbolTable) };
+const ClassInfo SymbolTable::s_info = { "SymbolTable", 0, 0, CREATE_METHOD_TABLE(SymbolTable) };
SymbolTableEntry& SymbolTableEntry::copySlow(const SymbolTableEntry& other)
{
return *this;
}
-void SharedSymbolTable::destroy(JSCell* cell)
+void SymbolTable::destroy(JSCell* cell)
{
- SharedSymbolTable* thisObject = jsCast<SharedSymbolTable*>(cell);
- thisObject->SharedSymbolTable::~SharedSymbolTable();
+ SymbolTable* thisObject = jsCast<SymbolTable*>(cell);
+ thisObject->SymbolTable::~SymbolTable();
}
void SymbolTableEntry::freeFatEntrySlow()
delete fatEntry();
}
-bool SymbolTableEntry::couldBeWatched()
+void SymbolTableEntry::prepareToWatch()
{
- if (!isFat())
- return false;
- WatchpointSet* watchpoints = fatEntry()->m_watchpoints.get();
- if (!watchpoints)
- return false;
- return watchpoints->isStillValid();
+ if (!isWatchable())
+ return;
+ FatEntry* entry = inflate();
+ if (entry->m_watchpoints)
+ return;
+ entry->m_watchpoints = adoptRef(new WatchpointSet(ClearWatchpoint));
}
-void SymbolTableEntry::attemptToWatch()
+void SymbolTableEntry::addWatchpoint(Watchpoint* watchpoint)
{
- FatEntry* entry = inflate();
- if (!entry->m_watchpoints)
- entry->m_watchpoints = adoptRef(new WatchpointSet(InitializedWatching));
+ fatEntry()->m_watchpoints->add(watchpoint);
}
-bool* SymbolTableEntry::addressOfIsWatched()
+SymbolTableEntry::FatEntry* SymbolTableEntry::inflateSlow()
{
- ASSERT(couldBeWatched());
- return fatEntry()->m_watchpoints->addressOfIsWatched();
+ FatEntry* entry = new FatEntry(m_bits);
+ m_bits = bitwise_cast<intptr_t>(entry);
+ return entry;
}
-void SymbolTableEntry::addWatchpoint(Watchpoint* watchpoint)
+SymbolTable::SymbolTable(VM& vm)
+ : JSCell(vm, vm.symbolTableStructure.get())
+ , m_usesNonStrictEval(false)
{
- ASSERT(couldBeWatched());
- fatEntry()->m_watchpoints->add(watchpoint);
}
-void SymbolTableEntry::notifyWriteSlow()
+SymbolTable::~SymbolTable() { }
+
+void SymbolTable::finishCreation(VM& vm)
+{
+ Base::finishCreation(vm);
+ m_singletonScope.set(vm, this, InferredValue::create(vm));
+}
+
+void SymbolTable::visitChildren(JSCell* thisCell, SlotVisitor& visitor)
+{
+ SymbolTable* thisSymbolTable = jsCast<SymbolTable*>(thisCell);
+
+ visitor.append(&thisSymbolTable->m_arguments);
+ visitor.append(&thisSymbolTable->m_singletonScope);
+
+ // Save some memory. This is O(n) to rebuild and we do so on the fly.
+ ConcurrentJITLocker locker(thisSymbolTable->m_lock);
+ thisSymbolTable->m_localToEntry = nullptr;
+}
+
+const SymbolTable::LocalToEntryVec& SymbolTable::localToEntry(const ConcurrentJITLocker&)
+{
+ if (UNLIKELY(!m_localToEntry)) {
+ unsigned size = 0;
+ for (auto& entry : m_map) {
+ VarOffset offset = entry.value.varOffset();
+ if (offset.isScope())
+ size = std::max(size, offset.scopeOffset().offset() + 1);
+ }
+
+ m_localToEntry = std::make_unique<LocalToEntryVec>(size, nullptr);
+ for (auto& entry : m_map) {
+ VarOffset offset = entry.value.varOffset();
+ if (offset.isScope())
+ m_localToEntry->at(offset.scopeOffset().offset()) = &entry.value;
+ }
+ }
+
+ return *m_localToEntry;
+}
+
+SymbolTableEntry* SymbolTable::entryFor(const ConcurrentJITLocker& locker, ScopeOffset offset)
{
- WatchpointSet* watchpoints = fatEntry()->m_watchpoints.get();
- if (!watchpoints)
+ auto& toEntryVector = localToEntry(locker);
+ if (offset.offset() >= toEntryVector.size())
+ return nullptr;
+ return toEntryVector[offset.offset()];
+}
+
+SymbolTable* SymbolTable::cloneScopePart(VM& vm)
+{
+ SymbolTable* result = SymbolTable::create(vm);
+
+ result->m_usesNonStrictEval = m_usesNonStrictEval;
+
+ for (auto iter = m_map.begin(), end = m_map.end(); iter != end; ++iter) {
+ if (!iter->value.varOffset().isScope())
+ continue;
+ result->m_map.add(
+ iter->key,
+ SymbolTableEntry(iter->value.varOffset(), iter->value.getAttributes()));
+ }
+
+ result->m_maxScopeOffset = m_maxScopeOffset;
+
+ if (ScopedArgumentsTable* arguments = this->arguments())
+ result->m_arguments.set(vm, result, arguments);
+
+ if (m_typeProfilingRareData) {
+ result->m_typeProfilingRareData = std::make_unique<TypeProfilingRareData>();
+
+ {
+ auto iter = m_typeProfilingRareData->m_uniqueIDMap.begin();
+ auto end = m_typeProfilingRareData->m_uniqueIDMap.end();
+ for (; iter != end; ++iter)
+ result->m_typeProfilingRareData->m_uniqueIDMap.set(iter->key, iter->value);
+ }
+
+ {
+ auto iter = m_typeProfilingRareData->m_offsetToVariableMap.begin();
+ auto end = m_typeProfilingRareData->m_offsetToVariableMap.end();
+ for (; iter != end; ++iter)
+ result->m_typeProfilingRareData->m_offsetToVariableMap.set(iter->key, iter->value);
+ }
+
+ {
+ auto iter = m_typeProfilingRareData->m_uniqueTypeSetMap.begin();
+ auto end = m_typeProfilingRareData->m_uniqueTypeSetMap.end();
+ for (; iter != end; ++iter)
+ result->m_typeProfilingRareData->m_uniqueTypeSetMap.set(iter->key, iter->value);
+ }
+ }
+
+ return result;
+}
+
+void SymbolTable::prepareForTypeProfiling(const ConcurrentJITLocker&)
+{
+ if (m_typeProfilingRareData)
return;
- watchpoints->notifyWrite();
+
+ m_typeProfilingRareData = std::make_unique<TypeProfilingRareData>();
+
+ for (auto iter = m_map.begin(), end = m_map.end(); iter != end; ++iter) {
+ m_typeProfilingRareData->m_uniqueIDMap.set(iter->key, TypeProfilerNeedsUniqueIDGeneration);
+ m_typeProfilingRareData->m_offsetToVariableMap.set(iter->value.varOffset(), iter->key);
+ }
}
-SymbolTableEntry::FatEntry* SymbolTableEntry::inflateSlow()
+GlobalVariableID SymbolTable::uniqueIDForVariable(const ConcurrentJITLocker&, UniquedStringImpl* key, VM& vm)
{
- FatEntry* entry = new FatEntry(m_bits);
- m_bits = bitwise_cast<intptr_t>(entry);
- return entry;
+ RELEASE_ASSERT(m_typeProfilingRareData);
+
+ auto iter = m_typeProfilingRareData->m_uniqueIDMap.find(key);
+ auto end = m_typeProfilingRareData->m_uniqueIDMap.end();
+ if (iter == end)
+ return TypeProfilerNoGlobalIDExists;
+
+ GlobalVariableID id = iter->value;
+ if (id == TypeProfilerNeedsUniqueIDGeneration) {
+ id = vm.typeProfiler()->getNextUniqueVariableID();
+ m_typeProfilingRareData->m_uniqueIDMap.set(key, id);
+ m_typeProfilingRareData->m_uniqueTypeSetMap.set(key, TypeSet::create()); // Make a new global typeset for this corresponding ID.
+ }
+
+ return id;
+}
+
+GlobalVariableID SymbolTable::uniqueIDForOffset(const ConcurrentJITLocker& locker, VarOffset offset, VM& vm)
+{
+ RELEASE_ASSERT(m_typeProfilingRareData);
+
+ auto iter = m_typeProfilingRareData->m_offsetToVariableMap.find(offset);
+ auto end = m_typeProfilingRareData->m_offsetToVariableMap.end();
+ if (iter == end)
+ return TypeProfilerNoGlobalIDExists;
+
+ return uniqueIDForVariable(locker, iter->value.get(), vm);
+}
+
+RefPtr<TypeSet> SymbolTable::globalTypeSetForOffset(const ConcurrentJITLocker& locker, VarOffset offset, VM& vm)
+{
+ RELEASE_ASSERT(m_typeProfilingRareData);
+
+ uniqueIDForOffset(locker, offset, vm); // Lazily create the TypeSet if necessary.
+
+ auto iter = m_typeProfilingRareData->m_offsetToVariableMap.find(offset);
+ auto end = m_typeProfilingRareData->m_offsetToVariableMap.end();
+ if (iter == end)
+ return nullptr;
+
+ return globalTypeSetForVariable(locker, iter->value.get(), vm);
+}
+
+RefPtr<TypeSet> SymbolTable::globalTypeSetForVariable(const ConcurrentJITLocker& locker, UniquedStringImpl* key, VM& vm)
+{
+ RELEASE_ASSERT(m_typeProfilingRareData);
+
+ uniqueIDForVariable(locker, key, vm); // Lazily create the TypeSet if necessary.
+
+ auto iter = m_typeProfilingRareData->m_uniqueTypeSetMap.find(key);
+ auto end = m_typeProfilingRareData->m_uniqueTypeSetMap.end();
+ if (iter == end)
+ return nullptr;
+
+ return iter->value;
}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff