AuroraMiddleware/v8
1
0
Fork 0
Code Issues 2 Pull Requests Releases Wiki Activity

cppgc: Provide alignment attribute to allocations functions

Browse Source 
assume_aligned allows the caller may assume alignment of the allocation
methods.

Bug: v8:12295
Change-Id: I0c946dd668ae9c0c1d83da7278ad8d87bab96717
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3218984
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77366}
This commit is contained in:
Michael Lippautz 2021-10-12 19:00:06 +02:00 committed by V8 LUCI CQ
parent 5638b7db6a
commit 83c9bdeddf
1 changed files with 30 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
include/cppgc/allocation.h
View File

@ -18,6 +18,23 @@
#include "cppgc/type-traits.h"
#include "v8config.h" // NOLINT(build/include_directory)
#if defined(__has_attribute)
#if __has_attribute(assume_aligned)
#define CPPGC_DEFAULT_ALIGNED \
__attribute__((assume_aligned(api_constants::kDefaultAlignment)))
#define CPPGC_DOUBLE_WORD_ALIGNED \
__attribute__((assume_aligned(2 * api_constants::kDefaultAlignment)))
#endif // __has_attribute(assume_aligned)
#endif // defined(__has_attribute)
#if !defined(CPPGC_DEFAULT_ALIGNED)
#define CPPGC_DEFAULT_ALIGNED
#endif
#if !defined(CPPGC_DOUBLE_WORD_ALIGNED)
#define CPPGC_DOUBLE_WORD_ALIGNED
#endif
namespace cppgc {
/**
@ -104,15 +121,16 @@ class V8_EXPORT MakeGarbageCollectedTraitInternal {
};
private:
static void* Allocate(cppgc::AllocationHandle& handle, size_t size,
GCInfoIndex index);
static void* Allocate(cppgc::AllocationHandle& handle, size_t size,
AlignVal alignment, GCInfoIndex index);
static void* Allocate(cppgc::AllocationHandle& handle, size_t size,
GCInfoIndex index, CustomSpaceIndex space_index);
static void* Allocate(cppgc::AllocationHandle& handle, size_t size,
AlignVal alignment, GCInfoIndex index,
CustomSpaceIndex space_index);
static void* CPPGC_DEFAULT_ALIGNED Allocate(cppgc::AllocationHandle&, size_t,
GCInfoIndex);
static void* CPPGC_DOUBLE_WORD_ALIGNED Allocate(cppgc::AllocationHandle&,
size_t, AlignVal,
GCInfoIndex);
static void* CPPGC_DEFAULT_ALIGNED Allocate(cppgc::AllocationHandle&, size_t,
GCInfoIndex, CustomSpaceIndex);
static void* CPPGC_DOUBLE_WORD_ALIGNED Allocate(cppgc::AllocationHandle&,
size_t, AlignVal, GCInfoIndex,
CustomSpaceIndex);
friend class HeapObjectHeader;
};
@ -286,4 +304,7 @@ V8_INLINE T* MakeGarbageCollected(AllocationHandle& handle,
} // namespace cppgc
#undef CPPGC_DEFAULT_ALIGNED
#undef CPPGC_DOUBLE_WORD_ALIGNED
#endif // INCLUDE_CPPGC_ALLOCATION_H_