v8::internal::AllocationSiteUsageContext Class Reference

#include <allocation-site-scopes.h>

Inheritance diagram for v8::internal::AllocationSiteUsageContext:

Collaboration diagram for v8::internal::AllocationSiteUsageContext:

Public Member Functions
	AllocationSiteUsageContext (Isolate *isolate, Handle< AllocationSite > site, bool activated)
Handle< AllocationSite >	EnterNewScope ()
void	ExitScope (Handle< AllocationSite > scope_site, Handle< JSObject > object)
bool	ShouldCreateMemento (Handle< JSObject > object)
Public Member Functions inherited from v8::internal::AllocationSiteContext
	AllocationSiteContext (Isolate *isolate)
Handle< AllocationSite >	top ()
Handle< AllocationSite >	current ()
bool	ShouldCreateMemento (Handle< JSObject > object)
Isolate *	isolate ()

Private Attributes
Handle< AllocationSite >	top_site_
bool	activated_

Additional Inherited Members
Protected Member Functions inherited from v8::internal::AllocationSiteContext
void	update_current_site (AllocationSite *site)
void	InitializeTraversal (Handle< AllocationSite > site)

Detailed Description

Definition at line 63 of file allocation-site-scopes.h.

Constructor & Destructor Documentation

AllocationSiteUsageContext()

v8::internal::AllocationSiteUsageContext::AllocationSiteUsageContext ( Isolate *  isolate, Handle< AllocationSite >  site, bool  activated  )

inline

Definition at line 65 of file allocation-site-scopes.h.

      : AllocationSiteContext(isolate),
        top_site_(site),
        activated_(activated) { }

Member Function Documentation

EnterNewScope()

Handle<AllocationSite> v8::internal::AllocationSiteUsageContext::EnterNewScope ( )

inline

Definition at line 71 of file allocation-site-scopes.h.

                                                {
    if (top().is_null()) {
      InitializeTraversal(top_site_);
    } else {
      // Advance current site
      Object* nested_site = current()->nested_site();
      // Something is wrong if we advance to the end of the list here.
      DCHECK(nested_site->IsAllocationSite());
      update_current_site(AllocationSite::cast(nested_site));
    }
    return Handle<AllocationSite>(*current(), isolate());
  }

References v8::internal::AllocationSiteContext::current(), DCHECK, v8::internal::AllocationSiteContext::InitializeTraversal(), v8::internal::AllocationSiteContext::isolate(), v8::internal::AllocationSiteContext::top(), top_site_, and v8::internal::AllocationSiteContext::update_current_site().

Referenced by v8::internal::HOptimizedGraphBuilder::BuildEmitFixedArray(), v8::internal::HOptimizedGraphBuilder::BuildEmitInObjectProperties(), v8::internal::CreateArrayLiteralImpl(), and v8::internal::RUNTIME_FUNCTION().

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ExitScope()

void v8::internal::AllocationSiteUsageContext::ExitScope ( Handle< AllocationSite >  scope_site, Handle< JSObject >  object  )

inline

Definition at line 84 of file allocation-site-scopes.h.

                                                 {
    // This assert ensures that we are pointing at the right sub-object in a
    // recursive walk of a nested literal.
    DCHECK(object.is_null() || *object == scope_site->transition_info());
  }

References DCHECK.

Referenced by v8::internal::HOptimizedGraphBuilder::BuildEmitFixedArray(), v8::internal::HOptimizedGraphBuilder::BuildEmitInObjectProperties(), v8::internal::CreateArrayLiteralImpl(), and v8::internal::RUNTIME_FUNCTION().

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ShouldCreateMemento()

bool v8::internal::AllocationSiteUsageContext::ShouldCreateMemento

(

Handle< JSObject >

object

)

Definition at line 63 of file allocation-site-scopes.cc.

                                                                            {
  if (activated_ && AllocationSite::CanTrack(object->map()->instance_type())) {
    if (FLAG_allocation_site_pretenuring ||
        AllocationSite::GetMode(object->GetElementsKind()) ==
        TRACK_ALLOCATION_SITE) {
      if (FLAG_trace_creation_allocation_sites) {
        PrintF("*** Creating Memento for %s %p\n",
               object->IsJSArray() ? "JSArray" : "JSObject",
               static_cast<void*>(*object));
      }
      return true;
    }
  }
  return false;
}

References activated_, v8::internal::AllocationSite::CanTrack(), v8::internal::AllocationSite::GetMode(), v8::internal::PrintF(), and v8::internal::TRACK_ALLOCATION_SITE.

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Member Data Documentation

activated_

bool v8::internal::AllocationSiteUsageContext::activated_

private

Definition at line 95 of file allocation-site-scopes.h.

Referenced by ShouldCreateMemento().

top_site_

Handle<AllocationSite> v8::internal::AllocationSiteUsageContext::top_site_

private

Definition at line 94 of file allocation-site-scopes.h.

Referenced by EnterNewScope().

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The documentation for this class was generated from the following files:

• /mnt/V8SourceCode/src/allocation-site-scopes.h
• /mnt/V8SourceCode/src/allocation-site-scopes.cc