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8202776: Modularize GC allocations in runtime

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Reviewed-by: eosterlund, shade
This commit is contained in:
Roman Kennke 2018-06-05 19:13:53 +02:00
parent fcfd1c85dd
commit 26b8ea76f5
3 changed files with 43 additions and 30 deletions
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23
src/hotspot/share/gc/shared/collectedHeap.hpp
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@ -141,8 +141,15 @@ class CollectedHeap : public CHeapObj<mtInternal> {
virtual void resize_all_tlabs();
// Allocate from the current thread's TLAB, with broken-out slow path.
inline static HeapWord* allocate_from_tlab(Klass* klass, Thread* thread, size_t size);
static HeapWord* allocate_from_tlab_slow(Klass* klass, Thread* thread, size_t size);
inline static HeapWord* allocate_from_tlab(Klass* klass, size_t size, TRAPS);
static HeapWord* allocate_from_tlab_slow(Klass* klass, size_t size, TRAPS);
// Raw memory allocation facilities
// The obj and array allocate methods are covers for these methods.
// mem_allocate() should never be
// called to allocate TLABs, only individual objects.
virtual HeapWord* mem_allocate(size_t size,
bool* gc_overhead_limit_was_exceeded) = 0;
// Allocate an uninitialized block of the given size, or returns NULL if
// this is impossible.
@ -309,12 +316,12 @@ class CollectedHeap : public CHeapObj<mtInternal> {
inline static oop array_allocate_nozero(Klass* klass, int size, int length, TRAPS);
inline static oop class_allocate(Klass* klass, int size, TRAPS);
// Raw memory allocation facilities
// The obj and array allocate methods are covers for these methods.
// mem_allocate() should never be
// called to allocate TLABs, only individual objects.
virtual HeapWord* mem_allocate(size_t size,
bool* gc_overhead_limit_was_exceeded) = 0;
// Raw memory allocation. This may or may not use TLAB allocations to satisfy the
// allocation. A GC implementation may override this function to satisfy the allocation
// in any way. But the default is to try a TLAB allocation, and otherwise perform
// mem_allocate.
virtual HeapWord* obj_allocate_raw(Klass* klass, size_t size,
bool* gc_overhead_limit_was_exceeded, TRAPS);
// Utilities for turning raw memory into filler objects.
//