| // Copyright 2021 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef GIN_V8_PLATFORM_PAGE_ALLOCATOR_H_ |
| #define GIN_V8_PLATFORM_PAGE_ALLOCATOR_H_ |
| |
| #include"build/build_config.h" |
| #include"build/buildflag.h" |
| #include"partition_alloc/buildflags.h" |
| |
| #if PA_BUILDFLAG(USE_PARTITION_ALLOC) |
| |
| #include"gin/gin_export.h" |
| #include"partition_alloc/page_allocator.h" |
| #include"v8/include/v8-platform.h" |
| |
| namespace gin{ |
| |
| // A v8::PageAllocator implementation to use with gin. |
| class GIN_EXPORTPageAllocatorfinal:public v8::PageAllocator{ |
| public: |
| ~PageAllocator()override; |
| |
| size_tAllocatePageSize()override; |
| |
| size_tCommitPageSize()override; |
| |
| voidSetRandomMmapSeed(int64_t seed)override; |
| |
| void*GetRandomMmapAddr()override; |
| |
| void*AllocatePages(void* address, |
| size_t length, |
| size_t alignment, |
| v8::PageAllocator::Permission permissions)override; |
| |
| boolFreePages(void* address,size_t length)override; |
| |
| boolReleasePages(void* address,size_t length,size_t new_length)override; |
| |
| boolSetPermissions(void* address, |
| size_t length, |
| Permission permissions)override; |
| |
| boolRecommitPages(void* address, |
| size_t length, |
| Permission permissions)override; |
| |
| boolDiscardSystemPages(void* address,size_t size)override; |
| |
| boolDecommitPages(void* address,size_t size)override; |
| |
| boolSealPages(void* address,size_t length)override; |
| |
| // For testing purposes only: Map the v8 page permissions into a page |
| // configuration from base. |
| ::partition_alloc::PageAccessibilityConfiguration::Permissions |
| GetPageConfigPermissionsForTesting(v8::PageAllocator::Permission permission); |
| }; |
| }// namespace gin |
| |
| #endif// PA_BUILDFLAG(USE_PARTITION_ALLOC) |
| |
| #endif// GIN_V8_PLATFORM_PAGE_ALLOCATOR_H_ |
