src/compilation-cache.cc - platform/external/v8 - 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/assembler.h"
 #include "src/counters.h"
 #include "src/factory.h"
 #include "src/objects-inl.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, 1),
       eval_global_(isolate, 1),
       eval_contextual_(isolate, 1),
       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::IterateFunctions(ObjectVisitor* v) {
   Object* undefined = isolate()->heap()->undefined_value();
   for (int i = 0; i < generations_; i++) {
     if (tables_[i] != undefined) {
       reinterpret_cast<CompilationCacheTable*>(tables_[i])->IterateElements(v);
     }
   }
 }


 void CompilationSubCache::Iterate(ObjectVisitor* v) {
   v->VisitPointers(&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,
                                                int generations)
     : CompilationSubCache(isolate, generations) {}


 // 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,
                                        Handle<Object> 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.
   if (name.is_null()) {
     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.
 Handle<SharedFunctionInfo> CompilationCacheScript::Lookup(
     Handle<String> source, Handle<Object> name, int line_offset,
     int column_offset, ScriptOriginOptions resource_options,
     Handle<Context> context, LanguageMode language_mode) {
   Object* result = NULL;
   int generation;

   // Probe the script generation tables. Make sure not to leak handles
   // into the caller's handle scope.
   { HandleScope scope(isolate());
     for (generation = 0; generation < generations(); generation++) {
       Handle<CompilationCacheTable> table = GetTable(generation);
       Handle<Object> probe = table->Lookup(source, context, language_mode);
       if (probe->IsSharedFunctionInfo()) {
         Handle<SharedFunctionInfo> function_info =
             Handle<SharedFunctionInfo>::cast(probe);
         // 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 = *function_info;
           break;
         }
       }
     }
   }

   // 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 != NULL) {
     Handle<SharedFunctionInfo> shared(SharedFunctionInfo::cast(result),
                                       isolate());
     DCHECK(
         HasOrigin(shared, name, line_offset, column_offset, resource_options));
     // If the script was found in a later generation, we promote it to
     // the first generation to let it survive longer in the cache.
     if (generation != 0) Put(source, context, language_mode, shared);
     isolate()->counters()->compilation_cache_hits()->Increment();
     return shared;
   } else {
     isolate()->counters()->compilation_cache_misses()->Increment();
     return Handle<SharedFunctionInfo>::null();
   }
 }


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


 MaybeHandle<SharedFunctionInfo> CompilationCacheEval::Lookup(
     Handle<String> source, Handle<SharedFunctionInfo> outer_info,
     LanguageMode language_mode, int scope_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.
   Handle<Object> result = isolate()->factory()->undefined_value();
   int generation;
   for (generation = 0; generation < generations(); generation++) {
     Handle<CompilationCacheTable> table = GetTable(generation);
     result =
         table->LookupEval(source, outer_info, language_mode, scope_position);
     if (result->IsSharedFunctionInfo()) break;
   }
   if (result->IsSharedFunctionInfo()) {
     Handle<SharedFunctionInfo> function_info =
         Handle<SharedFunctionInfo>::cast(result);
     if (generation != 0) {
       Put(source, outer_info, function_info, scope_position);
     }
     isolate()->counters()->compilation_cache_hits()->Increment();
     return scope.CloseAndEscape(function_info);
   } else {
     isolate()->counters()->compilation_cache_misses()->Increment();
     return MaybeHandle<SharedFunctionInfo>();
   }
 }


 void CompilationCacheEval::Put(Handle<String> source,
                                Handle<SharedFunctionInfo> outer_info,
                                Handle<SharedFunctionInfo> function_info,
                                int scope_position) {
   HandleScope scope(isolate());
   Handle<CompilationCacheTable> table = GetFirstTable();
   table = CompilationCacheTable::PutEval(table, source, outer_info,
                                          function_info, scope_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);
 }


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

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


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

   MaybeHandle<SharedFunctionInfo> result;
   if (context->IsNativeContext()) {
     result =
         eval_global_.Lookup(source, outer_info, language_mode, scope_position);
   } else {
     DCHECK(scope_position != RelocInfo::kNoPosition);
     result = eval_contextual_.Lookup(source, outer_info, language_mode,
                                      scope_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) {
   if (!IsEnabled()) return;

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


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

   HandleScope scope(isolate());
   if (context->IsNativeContext()) {
     eval_global_.Put(source, outer_info, function_info, scope_position);
   } else {
     DCHECK(scope_position != RelocInfo::kNoPosition);
     eval_contextual_.Put(source, outer_info, function_info, scope_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(ObjectVisitor* v) {
   for (int i = 0; i < kSubCacheCount; i++) {
     subcaches_[i]->Iterate(v);
   }
 }


 void CompilationCache::IterateFunctions(ObjectVisitor* v) {
   for (int i = 0; i < kSubCacheCount; i++) {
     subcaches_[i]->IterateFunctions(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/assembler.h"
	#include "src/counters.h"
	#include "src/factory.h"
	#include "src/objects-inl.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, 1),
	eval_global_(isolate, 1),
	eval_contextual_(isolate, 1),
	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::IterateFunctions(ObjectVisitor* v) {
	Object* undefined = isolate()->heap()->undefined_value();
	for (int i = 0; i < generations_; i++) {
	if (tables_[i] != undefined) {
	reinterpret_cast<CompilationCacheTable*>(tables_[i])->IterateElements(v);
	}
	}
	}


	void CompilationSubCache::Iterate(ObjectVisitor* v) {
	v->VisitPointers(&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,
	int generations)
	: CompilationSubCache(isolate, generations) {}


	// 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,
	Handle<Object> 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.
	if (name.is_null()) {
	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.
	Handle<SharedFunctionInfo> CompilationCacheScript::Lookup(
	Handle<String> source, Handle<Object> name, int line_offset,
	int column_offset, ScriptOriginOptions resource_options,
	Handle<Context> context, LanguageMode language_mode) {
	Object* result = NULL;
	int generation;

	// Probe the script generation tables. Make sure not to leak handles
	// into the caller's handle scope.
	{ HandleScope scope(isolate());
	for (generation = 0; generation < generations(); generation++) {
	Handle<CompilationCacheTable> table = GetTable(generation);
	Handle<Object> probe = table->Lookup(source, context, language_mode);
	if (probe->IsSharedFunctionInfo()) {
	Handle<SharedFunctionInfo> function_info =
	Handle<SharedFunctionInfo>::cast(probe);
	// 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 = *function_info;
	break;
	}
	}
	}
	}

	// 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 != NULL) {
	Handle<SharedFunctionInfo> shared(SharedFunctionInfo::cast(result),
	isolate());
	DCHECK(
	HasOrigin(shared, name, line_offset, column_offset, resource_options));
	// If the script was found in a later generation, we promote it to
	// the first generation to let it survive longer in the cache.
	if (generation != 0) Put(source, context, language_mode, shared);
	isolate()->counters()->compilation_cache_hits()->Increment();
	return shared;
	} else {
	isolate()->counters()->compilation_cache_misses()->Increment();
	return Handle<SharedFunctionInfo>::null();
	}
	}


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


	MaybeHandle<SharedFunctionInfo> CompilationCacheEval::Lookup(
	Handle<String> source, Handle<SharedFunctionInfo> outer_info,
	LanguageMode language_mode, int scope_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.
	Handle<Object> result = isolate()->factory()->undefined_value();
	int generation;
	for (generation = 0; generation < generations(); generation++) {
	Handle<CompilationCacheTable> table = GetTable(generation);
	result =
	table->LookupEval(source, outer_info, language_mode, scope_position);
	if (result->IsSharedFunctionInfo()) break;
	}
	if (result->IsSharedFunctionInfo()) {
	Handle<SharedFunctionInfo> function_info =
	Handle<SharedFunctionInfo>::cast(result);
	if (generation != 0) {
	Put(source, outer_info, function_info, scope_position);
	}
	isolate()->counters()->compilation_cache_hits()->Increment();
	return scope.CloseAndEscape(function_info);
	} else {
	isolate()->counters()->compilation_cache_misses()->Increment();
	return MaybeHandle<SharedFunctionInfo>();
	}
	}


	void CompilationCacheEval::Put(Handle<String> source,
	Handle<SharedFunctionInfo> outer_info,
	Handle<SharedFunctionInfo> function_info,
	int scope_position) {
	HandleScope scope(isolate());
	Handle<CompilationCacheTable> table = GetFirstTable();
	table = CompilationCacheTable::PutEval(table, source, outer_info,
	function_info, scope_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);
	}


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

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


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

	MaybeHandle<SharedFunctionInfo> result;
	if (context->IsNativeContext()) {
	result =
	eval_global_.Lookup(source, outer_info, language_mode, scope_position);
	} else {
	DCHECK(scope_position != RelocInfo::kNoPosition);
	result = eval_contextual_.Lookup(source, outer_info, language_mode,
	scope_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) {
	if (!IsEnabled()) return;

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


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

	HandleScope scope(isolate());
	if (context->IsNativeContext()) {
	eval_global_.Put(source, outer_info, function_info, scope_position);
	} else {
	DCHECK(scope_position != RelocInfo::kNoPosition);
	eval_contextual_.Put(source, outer_info, function_info, scope_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(ObjectVisitor* v) {
	for (int i = 0; i < kSubCacheCount; i++) {
	subcaches_[i]->Iterate(v);
	}
	}


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