v8::ThreadIsolatedAllocator Class Reference

#include <v8-platform.h>

Collaboration diagram for v8::ThreadIsolatedAllocator:

Public Types
enum class	Type { kPkey }

Public Member Functions
virtual	~ThreadIsolatedAllocator ()=default
virtual void *	Allocate (size_t size)=0
virtual void	Free (void *object)=0
virtual Type	Type () const =0
virtual int	Pkey () const

Static Public Member Functions
static void	SetDefaultPermissionsForSignalHandler ()

Detailed Description

An allocator that uses per-thread permissions to protect the memory.

The implementation is platform/hardware specific, e.g. using pkeys on x64.

INTERNAL ONLY: This interface has not been stabilised and may change without notice from one release to another without being deprecated first.

Definition at line 640 of file v8-platform.h.

Member Enumeration Documentation

Type

enum class v8::ThreadIsolatedAllocator::Type

strong

Enumerator
kPkey

Definition at line 648 of file v8-platform.h.

Constructor & Destructor Documentation

~ThreadIsolatedAllocator()

virtual v8::ThreadIsolatedAllocator::~ThreadIsolatedAllocator ( )

virtualdefault

Member Function Documentation

Allocate()

virtual void * v8::ThreadIsolatedAllocator::Allocate ( size_t size )

pure virtual

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Free()

virtual void v8::ThreadIsolatedAllocator::Free ( void * object )

pure virtual

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Pkey()

virtual int v8::ThreadIsolatedAllocator::Pkey ( ) const

inlinevirtual

Return the pkey used to implement the thread isolation if Type == kPkey.

Definition at line 657 of file v8-platform.h.

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SetDefaultPermissionsForSignalHandler()

void v8::ThreadIsolatedAllocator::SetDefaultPermissionsForSignalHandler ( )

static

Per-thread permissions can be reset on signal handler entry. Even reading ThreadIsolated memory will segfault in that case. Call this function on signal handler entry to ensure that read permissions are restored.

Definition at line 309 of file v8.cc.

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Type()

virtual Type v8::ThreadIsolatedAllocator::Type ( ) const

pure virtual

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

• include/v8-platform.h
• src/init/v8.cc