src/v8/src/compilation-cache.cc - cobalt - Git at Google

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "src/compilation-cache.h"

 #include "src/counters.h"
 #include "src/factory.h"
 #include "src/globals.h"
 #include "src/objects-inl.h"
 #include "src/objects/compilation-cache-inl.h"
 #include "src/visitors.h"

 namespace v8 {
 namespace internal {

 // The number of generations for each sub cache.
 static const int kRegExpGenerations = 2;

 // Initial size of each compilation cache table allocated.
 static const int kInitialCacheSize = 64;

 CompilationCache::CompilationCache(Isolate* isolate)
     : isolate_(isolate),
       script_(isolate),
       eval_global_(isolate),
       eval_contextual_(isolate),
       reg_exp_(isolate, kRegExpGenerations),
       enabled_(true) {
   CompilationSubCache* subcaches[kSubCacheCount] =
     {&script_, &eval_global_, &eval_contextual_, &reg_exp_};
   for (int i = 0; i < kSubCacheCount; ++i) {
     subcaches_[i] = subcaches[i];
   }
 }

 CompilationCache::~CompilationCache() {}

 Handle<CompilationCacheTable> CompilationSubCache::GetTable(int generation) {
   DCHECK(generation < generations_);
   Handle<CompilationCacheTable> result;
   if (tables_[generation]->IsUndefined(isolate())) {
     result = CompilationCacheTable::New(isolate(), kInitialCacheSize);
     tables_[generation] = *result;
   } else {
     CompilationCacheTable* table =
         CompilationCacheTable::cast(tables_[generation]);
     result = Handle<CompilationCacheTable>(table, isolate());
   }
   return result;
 }

 void CompilationSubCache::Age() {
   // Don't directly age single-generation caches.
   if (generations_ == 1) {
     if (!tables_[0]->IsUndefined(isolate())) {
       CompilationCacheTable::cast(tables_[0])->Age();
     }
     return;
   }

   // Age the generations implicitly killing off the oldest.
   for (int i = generations_ - 1; i > 0; i--) {
     tables_[i] = tables_[i - 1];
   }

   // Set the first generation as unborn.
   tables_[0] = isolate()->heap()->undefined_value();
 }

 void CompilationSubCache::Iterate(RootVisitor* v) {
   v->VisitRootPointers(Root::kCompilationCache, &tables_[0],
                        &tables_[generations_]);
 }

 void CompilationSubCache::Clear() {
   MemsetPointer(tables_, isolate()->heap()->undefined_value(), generations_);
 }

 void CompilationSubCache::Remove(Handle<SharedFunctionInfo> function_info) {
   // Probe the script generation tables. Make sure not to leak handles
   // into the caller's handle scope.
   { HandleScope scope(isolate());
     for (int generation = 0; generation < generations(); generation++) {
       Handle<CompilationCacheTable> table = GetTable(generation);
       table->Remove(*function_info);
     }
   }
 }

 CompilationCacheScript::CompilationCacheScript(Isolate* isolate)
     : CompilationSubCache(isolate, 1) {}

 // We only re-use a cached function for some script source code if the
 // script originates from the same place. This is to avoid issues
 // when reporting errors, etc.
 bool CompilationCacheScript::HasOrigin(Handle<SharedFunctionInfo> function_info,
                                        MaybeHandle<Object> maybe_name,
                                        int line_offset, int column_offset,
                                        ScriptOriginOptions resource_options) {
   Handle<Script> script =
       Handle<Script>(Script::cast(function_info->script()), isolate());
   // If the script name isn't set, the boilerplate script should have
   // an undefined name to have the same origin.
   Handle<Object> name;
   if (!maybe_name.ToHandle(&name)) {
     return script->name()->IsUndefined(isolate());
   }
   // Do the fast bailout checks first.
   if (line_offset != script->line_offset()) return false;
   if (column_offset != script->column_offset()) return false;
   // Check that both names are strings. If not, no match.
   if (!name->IsString() || !script->name()->IsString()) return false;
   // Are the origin_options same?
   if (resource_options.Flags() != script->origin_options().Flags())
     return false;
   // Compare the two name strings for equality.
   return String::Equals(Handle<String>::cast(name),
                         Handle<String>(String::cast(script->name())));
 }

 // TODO(245): Need to allow identical code from different contexts to
 // be cached in the same script generation. Currently the first use
 // will be cached, but subsequent code from different source / line
 // won't.
 InfoVectorPair CompilationCacheScript::Lookup(
     Handle<String> source, MaybeHandle<Object> name, int line_offset,
     int column_offset, ScriptOriginOptions resource_options,
     Handle<Context> context, LanguageMode language_mode) {
   InfoVectorPair result;

   // Probe the script generation tables. Make sure not to leak handles
   // into the caller's handle scope.
   { HandleScope scope(isolate());
     const int generation = 0;
     DCHECK_EQ(generations(), 1);
     Handle<CompilationCacheTable> table = GetTable(generation);
     InfoVectorPair probe = table->LookupScript(source, context, language_mode);
     if (probe.has_shared()) {
       Handle<SharedFunctionInfo> function_info(probe.shared(), isolate());
       Handle<Cell> vector_handle;
       if (probe.has_vector()) {
         vector_handle = Handle<Cell>(probe.vector(), isolate());
       }
       // Break when we've found a suitable shared function info that
       // matches the origin.
       if (HasOrigin(function_info, name, line_offset, column_offset,
                     resource_options)) {
         result = InfoVectorPair(*function_info,
                                 probe.has_vector() ? *vector_handle : nullptr);
       }
     }
   }

   // Once outside the manacles of the handle scope, we need to recheck
   // to see if we actually found a cached script. If so, we return a
   // handle created in the caller's handle scope.
   if (result.has_shared()) {
 #ifdef DEBUG
     // Since HasOrigin can allocate, we need to protect the SharedFunctionInfo
     // and the FeedbackVector with handles during the call.
     Handle<SharedFunctionInfo> shared(result.shared(), isolate());
     Handle<Cell> vector_handle;
     if (result.has_vector()) {
       vector_handle = Handle<Cell>(result.vector(), isolate());
     }
     DCHECK(
         HasOrigin(shared, name, line_offset, column_offset, resource_options));
     result =
         InfoVectorPair(*shared, result.has_vector() ? *vector_handle : nullptr);
 #endif
     isolate()->counters()->compilation_cache_hits()->Increment();
   } else {
     isolate()->counters()->compilation_cache_misses()->Increment();
   }
   return result;
 }

 void CompilationCacheScript::Put(Handle<String> source, Handle<Context> context,
                                  LanguageMode language_mode,
                                  Handle<SharedFunctionInfo> function_info,
                                  Handle<Cell> literals) {
   HandleScope scope(isolate());
   Handle<CompilationCacheTable> table = GetFirstTable();
   SetFirstTable(CompilationCacheTable::PutScript(
       table, source, context, language_mode, function_info, literals));
 }

 InfoVectorPair CompilationCacheEval::Lookup(
     Handle<String> source, Handle<SharedFunctionInfo> outer_info,
     Handle<Context> native_context, LanguageMode language_mode, int position) {
   HandleScope scope(isolate());
   // Make sure not to leak the table into the surrounding handle
   // scope. Otherwise, we risk keeping old tables around even after
   // having cleared the cache.
   InfoVectorPair result;
   const int generation = 0;
   DCHECK_EQ(generations(), 1);
   Handle<CompilationCacheTable> table = GetTable(generation);
   result = table->LookupEval(source, outer_info, native_context, language_mode,
                              position);
   if (result.has_shared()) {
     isolate()->counters()->compilation_cache_hits()->Increment();
   } else {
     isolate()->counters()->compilation_cache_misses()->Increment();
   }
   return result;
 }

 void CompilationCacheEval::Put(Handle<String> source,
                                Handle<SharedFunctionInfo> outer_info,
                                Handle<SharedFunctionInfo> function_info,
                                Handle<Context> native_context,
                                Handle<Cell> literals, int position) {
   HandleScope scope(isolate());
   Handle<CompilationCacheTable> table = GetFirstTable();
   table =
       CompilationCacheTable::PutEval(table, source, outer_info, function_info,
                                      native_context, literals, position);
   SetFirstTable(table);
 }

 MaybeHandle<FixedArray> CompilationCacheRegExp::Lookup(
     Handle<String> source,
     JSRegExp::Flags flags) {
   HandleScope scope(isolate());
   // Make sure not to leak the table into the surrounding handle
   // scope. Otherwise, we risk keeping old tables around even after
   // having cleared the cache.
   Handle<Object> result = isolate()->factory()->undefined_value();
   int generation;
   for (generation = 0; generation < generations(); generation++) {
     Handle<CompilationCacheTable> table = GetTable(generation);
     result = table->LookupRegExp(source, flags);
     if (result->IsFixedArray()) break;
   }
   if (result->IsFixedArray()) {
     Handle<FixedArray> data = Handle<FixedArray>::cast(result);
     if (generation != 0) {
       Put(source, flags, data);
     }
     isolate()->counters()->compilation_cache_hits()->Increment();
     return scope.CloseAndEscape(data);
   } else {
     isolate()->counters()->compilation_cache_misses()->Increment();
     return MaybeHandle<FixedArray>();
   }
 }

 void CompilationCacheRegExp::Put(Handle<String> source,
                                  JSRegExp::Flags flags,
                                  Handle<FixedArray> data) {
   HandleScope scope(isolate());
   Handle<CompilationCacheTable> table = GetFirstTable();
   SetFirstTable(CompilationCacheTable::PutRegExp(table, source, flags, data));
 }

 void CompilationCache::Remove(Handle<SharedFunctionInfo> function_info) {
   if (!IsEnabled()) return;

   eval_global_.Remove(function_info);
   eval_contextual_.Remove(function_info);
   script_.Remove(function_info);
 }

 InfoVectorPair CompilationCache::LookupScript(
     Handle<String> source, MaybeHandle<Object> name, int line_offset,
     int column_offset, ScriptOriginOptions resource_options,
     Handle<Context> context, LanguageMode language_mode) {
   InfoVectorPair empty_result;
   if (!IsEnabled()) return empty_result;

   return script_.Lookup(source, name, line_offset, column_offset,
                         resource_options, context, language_mode);
 }

 InfoVectorPair CompilationCache::LookupEval(
     Handle<String> source, Handle<SharedFunctionInfo> outer_info,
     Handle<Context> context, LanguageMode language_mode, int position) {
   InfoVectorPair result;
   if (!IsEnabled()) return result;

   if (context->IsNativeContext()) {
     result = eval_global_.Lookup(source, outer_info, context, language_mode,
                                  position);
   } else {
     DCHECK_NE(position, kNoSourcePosition);
     Handle<Context> native_context(context->native_context(), isolate());
     result = eval_contextual_.Lookup(source, outer_info, native_context,
                                      language_mode, position);
   }

   return result;
 }

 MaybeHandle<FixedArray> CompilationCache::LookupRegExp(Handle<String> source,
                                                        JSRegExp::Flags flags) {
   if (!IsEnabled()) return MaybeHandle<FixedArray>();

   return reg_exp_.Lookup(source, flags);
 }

 void CompilationCache::PutScript(Handle<String> source, Handle<Context> context,
                                  LanguageMode language_mode,
                                  Handle<SharedFunctionInfo> function_info,
                                  Handle<Cell> literals) {
   if (!IsEnabled()) return;

   script_.Put(source, context, language_mode, function_info, literals);
 }

 void CompilationCache::PutEval(Handle<String> source,
                                Handle<SharedFunctionInfo> outer_info,
                                Handle<Context> context,
                                Handle<SharedFunctionInfo> function_info,
                                Handle<Cell> literals, int position) {
   if (!IsEnabled()) return;

   HandleScope scope(isolate());
   if (context->IsNativeContext()) {
     eval_global_.Put(source, outer_info, function_info, context, literals,
                      position);
   } else {
     DCHECK_NE(position, kNoSourcePosition);
     Handle<Context> native_context(context->native_context(), isolate());
     eval_contextual_.Put(source, outer_info, function_info, native_context,
                          literals, position);
   }
 }

 void CompilationCache::PutRegExp(Handle<String> source,
                                  JSRegExp::Flags flags,
                                  Handle<FixedArray> data) {
   if (!IsEnabled()) {
     return;
   }

   reg_exp_.Put(source, flags, data);
 }

 void CompilationCache::Clear() {
   for (int i = 0; i < kSubCacheCount; i++) {
     subcaches_[i]->Clear();
   }
 }

 void CompilationCache::Iterate(RootVisitor* v) {
   for (int i = 0; i < kSubCacheCount; i++) {
     subcaches_[i]->Iterate(v);
   }
 }

 void CompilationCache::MarkCompactPrologue() {
   for (int i = 0; i < kSubCacheCount; i++) {
     subcaches_[i]->Age();
   }
 }

 void CompilationCache::Enable() {
   enabled_ = true;
 }

 void CompilationCache::Disable() {
   enabled_ = false;
   Clear();
 }

 }  // namespace internal
 }  // namespace v8
	// Copyright 2011 the V8 project authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "src/compilation-cache.h"

	#include "src/counters.h"
	#include "src/factory.h"
	#include "src/globals.h"
	#include "src/objects-inl.h"
	#include "src/objects/compilation-cache-inl.h"
	#include "src/visitors.h"

	namespace v8 {
	namespace internal {

	// The number of generations for each sub cache.
	static const int kRegExpGenerations = 2;

	// Initial size of each compilation cache table allocated.
	static const int kInitialCacheSize = 64;

	CompilationCache::CompilationCache(Isolate* isolate)
	: isolate_(isolate),
	script_(isolate),
	eval_global_(isolate),
	eval_contextual_(isolate),
	reg_exp_(isolate, kRegExpGenerations),
	enabled_(true) {
	CompilationSubCache* subcaches[kSubCacheCount] =
	{&script_, &eval_global_, &eval_contextual_, &reg_exp_};
	for (int i = 0; i < kSubCacheCount; ++i) {
	subcaches_[i] = subcaches[i];
	}
	}

	CompilationCache::~CompilationCache() {}

	Handle<CompilationCacheTable> CompilationSubCache::GetTable(int generation) {
	DCHECK(generation < generations_);
	Handle<CompilationCacheTable> result;
	if (tables_[generation]->IsUndefined(isolate())) {
	result = CompilationCacheTable::New(isolate(), kInitialCacheSize);
	tables_[generation] = *result;
	} else {
	CompilationCacheTable* table =
	CompilationCacheTable::cast(tables_[generation]);
	result = Handle<CompilationCacheTable>(table, isolate());
	}
	return result;
	}

	void CompilationSubCache::Age() {
	// Don't directly age single-generation caches.
	if (generations_ == 1) {
	if (!tables_[0]->IsUndefined(isolate())) {
	CompilationCacheTable::cast(tables_[0])->Age();
	}
	return;
	}

	// Age the generations implicitly killing off the oldest.
	for (int i = generations_ - 1; i > 0; i--) {
	tables_[i] = tables_[i - 1];
	}

	// Set the first generation as unborn.
	tables_[0] = isolate()->heap()->undefined_value();
	}

	void CompilationSubCache::Iterate(RootVisitor* v) {
	v->VisitRootPointers(Root::kCompilationCache, &tables_[0],
	&tables_[generations_]);
	}

	void CompilationSubCache::Clear() {
	MemsetPointer(tables_, isolate()->heap()->undefined_value(), generations_);
	}

	void CompilationSubCache::Remove(Handle<SharedFunctionInfo> function_info) {
	// Probe the script generation tables. Make sure not to leak handles
	// into the caller's handle scope.
	{ HandleScope scope(isolate());
	for (int generation = 0; generation < generations(); generation++) {
	Handle<CompilationCacheTable> table = GetTable(generation);
	table->Remove(*function_info);
	}
	}
	}

	CompilationCacheScript::CompilationCacheScript(Isolate* isolate)
	: CompilationSubCache(isolate, 1) {}

	// We only re-use a cached function for some script source code if the
	// script originates from the same place. This is to avoid issues
	// when reporting errors, etc.
	bool CompilationCacheScript::HasOrigin(Handle<SharedFunctionInfo> function_info,
	MaybeHandle<Object> maybe_name,
	int line_offset, int column_offset,
	ScriptOriginOptions resource_options) {
	Handle<Script> script =
	Handle<Script>(Script::cast(function_info->script()), isolate());
	// If the script name isn't set, the boilerplate script should have
	// an undefined name to have the same origin.
	Handle<Object> name;
	if (!maybe_name.ToHandle(&name)) {
	return script->name()->IsUndefined(isolate());
	}
	// Do the fast bailout checks first.
	if (line_offset != script->line_offset()) return false;
	if (column_offset != script->column_offset()) return false;
	// Check that both names are strings. If not, no match.
	if (!name->IsString() \|\| !script->name()->IsString()) return false;
	// Are the origin_options same?
	if (resource_options.Flags() != script->origin_options().Flags())
	return false;
	// Compare the two name strings for equality.
	return String::Equals(Handle<String>::cast(name),
	Handle<String>(String::cast(script->name())));
	}

	// TODO(245): Need to allow identical code from different contexts to
	// be cached in the same script generation. Currently the first use
	// will be cached, but subsequent code from different source / line
	// won't.
	InfoVectorPair CompilationCacheScript::Lookup(
	Handle<String> source, MaybeHandle<Object> name, int line_offset,
	int column_offset, ScriptOriginOptions resource_options,
	Handle<Context> context, LanguageMode language_mode) {
	InfoVectorPair result;

	// Probe the script generation tables. Make sure not to leak handles
	// into the caller's handle scope.
	{ HandleScope scope(isolate());
	const int generation = 0;
	DCHECK_EQ(generations(), 1);
	Handle<CompilationCacheTable> table = GetTable(generation);
	InfoVectorPair probe = table->LookupScript(source, context, language_mode);
	if (probe.has_shared()) {
	Handle<SharedFunctionInfo> function_info(probe.shared(), isolate());
	Handle<Cell> vector_handle;
	if (probe.has_vector()) {
	vector_handle = Handle<Cell>(probe.vector(), isolate());
	}
	// Break when we've found a suitable shared function info that
	// matches the origin.
	if (HasOrigin(function_info, name, line_offset, column_offset,
	resource_options)) {
	result = InfoVectorPair(*function_info,
	probe.has_vector() ? *vector_handle : nullptr);
	}
	}
	}

	// Once outside the manacles of the handle scope, we need to recheck
	// to see if we actually found a cached script. If so, we return a
	// handle created in the caller's handle scope.
	if (result.has_shared()) {
	#ifdef DEBUG
	// Since HasOrigin can allocate, we need to protect the SharedFunctionInfo
	// and the FeedbackVector with handles during the call.
	Handle<SharedFunctionInfo> shared(result.shared(), isolate());
	Handle<Cell> vector_handle;
	if (result.has_vector()) {
	vector_handle = Handle<Cell>(result.vector(), isolate());
	}
	DCHECK(
	HasOrigin(shared, name, line_offset, column_offset, resource_options));
	result =
	InfoVectorPair(shared, result.has_vector() ? vector_handle : nullptr);
	#endif
	isolate()->counters()->compilation_cache_hits()->Increment();
	} else {
	isolate()->counters()->compilation_cache_misses()->Increment();
	}
	return result;
	}

	void CompilationCacheScript::Put(Handle<String> source, Handle<Context> context,
	LanguageMode language_mode,
	Handle<SharedFunctionInfo> function_info,
	Handle<Cell> literals) {
	HandleScope scope(isolate());
	Handle<CompilationCacheTable> table = GetFirstTable();
	SetFirstTable(CompilationCacheTable::PutScript(
	table, source, context, language_mode, function_info, literals));
	}

	InfoVectorPair CompilationCacheEval::Lookup(
	Handle<String> source, Handle<SharedFunctionInfo> outer_info,
	Handle<Context> native_context, LanguageMode language_mode, int position) {
	HandleScope scope(isolate());
	// Make sure not to leak the table into the surrounding handle
	// scope. Otherwise, we risk keeping old tables around even after
	// having cleared the cache.
	InfoVectorPair result;
	const int generation = 0;
	DCHECK_EQ(generations(), 1);
	Handle<CompilationCacheTable> table = GetTable(generation);
	result = table->LookupEval(source, outer_info, native_context, language_mode,
	position);
	if (result.has_shared()) {
	isolate()->counters()->compilation_cache_hits()->Increment();
	} else {
	isolate()->counters()->compilation_cache_misses()->Increment();
	}
	return result;
	}

	void CompilationCacheEval::Put(Handle<String> source,
	Handle<SharedFunctionInfo> outer_info,
	Handle<SharedFunctionInfo> function_info,
	Handle<Context> native_context,
	Handle<Cell> literals, int position) {
	HandleScope scope(isolate());
	Handle<CompilationCacheTable> table = GetFirstTable();
	table =
	CompilationCacheTable::PutEval(table, source, outer_info, function_info,
	native_context, literals, position);
	SetFirstTable(table);
	}

	MaybeHandle<FixedArray> CompilationCacheRegExp::Lookup(
	Handle<String> source,
	JSRegExp::Flags flags) {
	HandleScope scope(isolate());
	// Make sure not to leak the table into the surrounding handle
	// scope. Otherwise, we risk keeping old tables around even after
	// having cleared the cache.
	Handle<Object> result = isolate()->factory()->undefined_value();
	int generation;
	for (generation = 0; generation < generations(); generation++) {
	Handle<CompilationCacheTable> table = GetTable(generation);
	result = table->LookupRegExp(source, flags);
	if (result->IsFixedArray()) break;
	}
	if (result->IsFixedArray()) {
	Handle<FixedArray> data = Handle<FixedArray>::cast(result);
	if (generation != 0) {
	Put(source, flags, data);
	}
	isolate()->counters()->compilation_cache_hits()->Increment();
	return scope.CloseAndEscape(data);
	} else {
	isolate()->counters()->compilation_cache_misses()->Increment();
	return MaybeHandle<FixedArray>();
	}
	}

	void CompilationCacheRegExp::Put(Handle<String> source,
	JSRegExp::Flags flags,
	Handle<FixedArray> data) {
	HandleScope scope(isolate());
	Handle<CompilationCacheTable> table = GetFirstTable();
	SetFirstTable(CompilationCacheTable::PutRegExp(table, source, flags, data));
	}

	void CompilationCache::Remove(Handle<SharedFunctionInfo> function_info) {
	if (!IsEnabled()) return;

	eval_global_.Remove(function_info);
	eval_contextual_.Remove(function_info);
	script_.Remove(function_info);
	}

	InfoVectorPair CompilationCache::LookupScript(
	Handle<String> source, MaybeHandle<Object> name, int line_offset,
	int column_offset, ScriptOriginOptions resource_options,
	Handle<Context> context, LanguageMode language_mode) {
	InfoVectorPair empty_result;
	if (!IsEnabled()) return empty_result;

	return script_.Lookup(source, name, line_offset, column_offset,
	resource_options, context, language_mode);
	}

	InfoVectorPair CompilationCache::LookupEval(
	Handle<String> source, Handle<SharedFunctionInfo> outer_info,
	Handle<Context> context, LanguageMode language_mode, int position) {
	InfoVectorPair result;
	if (!IsEnabled()) return result;

	if (context->IsNativeContext()) {
	result = eval_global_.Lookup(source, outer_info, context, language_mode,
	position);
	} else {
	DCHECK_NE(position, kNoSourcePosition);
	Handle<Context> native_context(context->native_context(), isolate());
	result = eval_contextual_.Lookup(source, outer_info, native_context,
	language_mode, position);
	}

	return result;
	}

	MaybeHandle<FixedArray> CompilationCache::LookupRegExp(Handle<String> source,
	JSRegExp::Flags flags) {
	if (!IsEnabled()) return MaybeHandle<FixedArray>();

	return reg_exp_.Lookup(source, flags);
	}

	void CompilationCache::PutScript(Handle<String> source, Handle<Context> context,
	LanguageMode language_mode,
	Handle<SharedFunctionInfo> function_info,
	Handle<Cell> literals) {
	if (!IsEnabled()) return;

	script_.Put(source, context, language_mode, function_info, literals);
	}

	void CompilationCache::PutEval(Handle<String> source,
	Handle<SharedFunctionInfo> outer_info,
	Handle<Context> context,
	Handle<SharedFunctionInfo> function_info,
	Handle<Cell> literals, int position) {
	if (!IsEnabled()) return;

	HandleScope scope(isolate());
	if (context->IsNativeContext()) {
	eval_global_.Put(source, outer_info, function_info, context, literals,
	position);
	} else {
	DCHECK_NE(position, kNoSourcePosition);
	Handle<Context> native_context(context->native_context(), isolate());
	eval_contextual_.Put(source, outer_info, function_info, native_context,
	literals, position);
	}
	}

	void CompilationCache::PutRegExp(Handle<String> source,
	JSRegExp::Flags flags,
	Handle<FixedArray> data) {
	if (!IsEnabled()) {
	return;
	}

	reg_exp_.Put(source, flags, data);
	}

	void CompilationCache::Clear() {
	for (int i = 0; i < kSubCacheCount; i++) {
	subcaches_[i]->Clear();
	}
	}

	void CompilationCache::Iterate(RootVisitor* v) {
	for (int i = 0; i < kSubCacheCount; i++) {
	subcaches_[i]->Iterate(v);
	}
	}

	void CompilationCache::MarkCompactPrologue() {
	for (int i = 0; i < kSubCacheCount; i++) {
	subcaches_[i]->Age();
	}
	}

	void CompilationCache::Enable() {
	enabled_ = true;
	}

	void CompilationCache::Disable() {
	enabled_ = false;
	Clear();
	}

	} // namespace internal
	} // namespace v8