[heap] Rename main thread allocation functions

Rename functions for main thread allocation to indicate that they are
used for main thread allocation.

Bug: v8:10315
Change-Id: Idd359a7a439ec2e93f0bdc2f1bed987755790bbe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2292308Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68828}

src/heap/paged-spaces-inl.h

@@ -89,12 +89,11 @@ bool PagedSpace::TryFreeLast(HeapObject object, int object_size) {
   return false;
 }
 
-bool PagedSpace::EnsureLinearAllocationArea(int size_in_bytes,
-                                            AllocationOrigin origin) {
+bool PagedSpace::EnsureLabMain(int size_in_bytes, AllocationOrigin origin) {
   if (allocation_info_.top() + size_in_bytes <= allocation_info_.limit()) {
     return true;
   }
-  return SlowRefillLinearAllocationArea(size_in_bytes, origin);
+  return RefillLabMain(size_in_bytes, origin);
 }
 
 AllocationResult PagedSpace::AllocateLinearly(int size_in_bytes) {
@@ -130,7 +129,7 @@ AllocationResult PagedSpace::TryAllocateLinearlyAligned(
 
 AllocationResult PagedSpace::AllocateRawUnaligned(int size_in_bytes,
                                                   AllocationOrigin origin) {
-  if (!EnsureLinearAllocationArea(size_in_bytes, origin)) {
+  if (!EnsureLabMain(size_in_bytes, origin)) {
     return AllocationResult::Retry(identity());
   }
   AllocationResult result = AllocateLinearly(size_in_bytes);
@@ -154,7 +153,7 @@ AllocationResult PagedSpace::AllocateRawAligned(int size_in_bytes,
   // allocated, so assume the worst case.
   int filler_size = Heap::GetMaximumFillToAlign(alignment);
   allocation_size += filler_size;
-  if (!EnsureLinearAllocationArea(allocation_size, origin)) {
+  if (!EnsureLabMain(allocation_size, origin)) {
     return AllocationResult::Retry(identity());
   }
   allocation_size = size_in_bytes;

src/heap/paged-spaces.cc

@@ -512,8 +512,8 @@ std::unique_ptr<ObjectIterator> PagedSpace::GetObjectIterator(Heap* heap) {
       new PagedSpaceObjectIterator(heap, this));
 }
 
-bool PagedSpace::RefillLinearAllocationAreaFromFreeList(
-    size_t size_in_bytes, AllocationOrigin origin) {
+bool PagedSpace::RefillLabFromFreeListMain(size_t size_in_bytes,
+                                           AllocationOrigin origin) {
   DCHECK(IsAligned(size_in_bytes, kTaggedSize));
   DCHECK_LE(top(), limit());
 #ifdef DEBUG
@@ -859,24 +859,7 @@ size_t PagedSpace::SizeOfObjects() {
   return Size() - (limit() - top());
 }
 
-bool PagedSpace::EnsureSweptAndRetryAllocation(int size_in_bytes,
-                                               AllocationOrigin origin) {
-  DCHECK(!is_local_space());
-  MarkCompactCollector* collector = heap()->mark_compact_collector();
-  if (collector->sweeping_in_progress()) {
-    // Complete sweeping for this space.
-    collector->DrainSweepingWorklistForSpace(identity());
-    RefillFreeList();
-
-    // After waiting for the sweeper threads, there may be new free-list
-    // entries.
-    return RefillLinearAllocationAreaFromFreeList(size_in_bytes, origin);
-  }
-  return false;
-}
-
-bool PagedSpace::SlowRefillLinearAllocationArea(int size_in_bytes,
-                                                AllocationOrigin origin) {
+bool PagedSpace::RefillLabMain(int size_in_bytes, AllocationOrigin origin) {
   VMState<GC> state(heap()->isolate());
   RuntimeCallTimerScope runtime_timer(
       heap()->isolate(), RuntimeCallCounterId::kGC_Custom_SlowAllocateRaw);
@@ -887,31 +870,28 @@ bool PagedSpace::SlowRefillLinearAllocationArea(int size_in_bytes,
     optional_mutex.emplace(&allocation_mutex_);
   }
 
-  return RawSlowRefillLinearAllocationArea(size_in_bytes, origin);
+  return RawRefillLabMain(size_in_bytes, origin);
 }
 
-bool CompactionSpace::SlowRefillLinearAllocationArea(int size_in_bytes,
+bool CompactionSpace::RefillLabMain(int size_in_bytes,
                                     AllocationOrigin origin) {
-  return RawSlowRefillLinearAllocationArea(size_in_bytes, origin);
+  return RawRefillLabMain(size_in_bytes, origin);
 }
 
-bool OffThreadSpace::SlowRefillLinearAllocationArea(int size_in_bytes,
-                                                    AllocationOrigin origin) {
-  if (RefillLinearAllocationAreaFromFreeList(size_in_bytes, origin))
-    return true;
+bool OffThreadSpace::RefillLabMain(int size_in_bytes, AllocationOrigin origin) {
+  if (RefillLabFromFreeListMain(size_in_bytes, origin)) return true;
 
   if (heap()->CanExpandOldGenerationBackground(size_in_bytes) && Expand()) {
     DCHECK((CountTotalPages() > 1) ||
            (static_cast<size_t>(size_in_bytes) <= free_list_->Available()));
-    return RefillLinearAllocationAreaFromFreeList(
-        static_cast<size_t>(size_in_bytes), origin);
+    return RefillLabFromFreeListMain(static_cast<size_t>(size_in_bytes),
+                                     origin);
   }
 
   return false;
 }
 
-bool PagedSpace::RawSlowRefillLinearAllocationArea(int size_in_bytes,
-                                                   AllocationOrigin origin) {
+bool PagedSpace::RawRefillLabMain(int size_in_bytes, AllocationOrigin origin) {
   // Non-compaction local spaces are not supported.
   DCHECK_IMPLIES(is_local_space(), is_compaction_space());
 
@@ -919,8 +899,7 @@ bool PagedSpace::RawSlowRefillLinearAllocationArea(int size_in_bytes,
   DCHECK_GE(size_in_bytes, 0);
   const int kMaxPagesToSweep = 1;
 
-  if (RefillLinearAllocationAreaFromFreeList(size_in_bytes, origin))
-    return true;
+  if (RefillLabFromFreeListMain(size_in_bytes, origin)) return true;
 
   MarkCompactCollector* collector = heap()->mark_compact_collector();
   // Sweeping is still in progress.
@@ -935,11 +914,10 @@ bool PagedSpace::RawSlowRefillLinearAllocationArea(int size_in_bytes,
     RefillFreeList();
 
     // Retry the free list allocation.
-    if (RefillLinearAllocationAreaFromFreeList(
-            static_cast<size_t>(size_in_bytes), origin))
+    if (RefillLabFromFreeListMain(static_cast<size_t>(size_in_bytes), origin))
       return true;
 
-    if (SweepAndRetryAllocation(size_in_bytes, kMaxPagesToSweep, size_in_bytes,
+    if (ContributeToSweepingMain(size_in_bytes, kMaxPagesToSweep, size_in_bytes,
                                  origin))
       return true;
   }
@@ -951,8 +929,7 @@ bool PagedSpace::RawSlowRefillLinearAllocationArea(int size_in_bytes,
     Page* page = main_space->RemovePageSafe(size_in_bytes);
     if (page != nullptr) {
       AddPage(page);
-      if (RefillLinearAllocationAreaFromFreeList(
-              static_cast<size_t>(size_in_bytes), origin))
+      if (RefillLabFromFreeListMain(static_cast<size_t>(size_in_bytes), origin))
         return true;
     }
   }
@@ -966,23 +943,29 @@ bool PagedSpace::RawSlowRefillLinearAllocationArea(int size_in_bytes,
       }
       DCHECK((CountTotalPages() > 1) ||
              (static_cast<size_t>(size_in_bytes) <= free_list_->Available()));
-      return RefillLinearAllocationAreaFromFreeList(
-          static_cast<size_t>(size_in_bytes), origin);
+      return RefillLabFromFreeListMain(static_cast<size_t>(size_in_bytes),
+                                       origin);
     }
   }
 
   if (is_compaction_space()) {
-    return SweepAndRetryAllocation(0, 0, size_in_bytes, origin);
+    return ContributeToSweepingMain(0, 0, size_in_bytes, origin);
 
   } else {
-    // If sweeper threads are active, wait for them at that point and steal
-    // elements from their free-lists. Allocation may still fail here which
-    // would indicate that there is not enough memory for the given allocation.
-    return EnsureSweptAndRetryAllocation(size_in_bytes, origin);
+    DCHECK(!is_local_space());
+    if (collector->sweeping_in_progress()) {
+      // Complete sweeping for this space.
+      collector->DrainSweepingWorklistForSpace(identity());
+      RefillFreeList();
+
+      // Last try to acquire memory from free list.
+      return RefillLabFromFreeListMain(size_in_bytes, origin);
+    }
+    return false;
   }
 }
 
-bool PagedSpace::SweepAndRetryAllocation(int required_freed_bytes,
+bool PagedSpace::ContributeToSweepingMain(int required_freed_bytes,
                                           int max_pages, int size_in_bytes,
                                           AllocationOrigin origin) {
   // Cleanup invalidated old-to-new refs for compaction space in the
@@ -998,7 +981,7 @@ bool PagedSpace::SweepAndRetryAllocation(int required_freed_bytes,
         invalidated_slots_in_free_space);
     RefillFreeList();
     if (max_freed >= size_in_bytes)
-      return RefillLinearAllocationAreaFromFreeList(size_in_bytes, origin);
+      return RefillLabFromFreeListMain(size_in_bytes, origin);
   }
   return false;
 }

src/heap/paged-spaces.h

@@ -353,8 +353,7 @@ class V8_EXPORT_PRIVATE PagedSpace
   // Sets up a linear allocation area that fits the given number of bytes.
   // Returns false if there is not enough space and the caller has to retry
   // after collecting garbage.
-  inline bool EnsureLinearAllocationArea(int size_in_bytes,
-                                         AllocationOrigin origin);
+  inline bool EnsureLabMain(int size_in_bytes, AllocationOrigin origin);
   // Allocates an object from the linear allocation area. Assumes that the
   // linear allocation area is large enought to fit the object.
   inline AllocationResult AllocateLinearly(int size_in_bytes);
@@ -365,31 +364,24 @@ class V8_EXPORT_PRIVATE PagedSpace
   inline AllocationResult TryAllocateLinearlyAligned(
       int* size_in_bytes, AllocationAlignment alignment);
 
-  V8_WARN_UNUSED_RESULT bool RefillLinearAllocationAreaFromFreeList(
-      size_t size_in_bytes, AllocationOrigin origin);
-
-  // If sweeping is still in progress try to sweep unswept pages. If that is
-  // not successful, wait for the sweeper threads and retry free-list
-  // allocation. Returns false if there is not enough space and the caller
-  // has to retry after collecting garbage.
-  V8_WARN_UNUSED_RESULT bool EnsureSweptAndRetryAllocation(
-      int size_in_bytes, AllocationOrigin origin);
+  V8_WARN_UNUSED_RESULT bool RefillLabFromFreeListMain(size_t size_in_bytes,
+                                                       AllocationOrigin origin);
 
-  V8_WARN_UNUSED_RESULT bool SweepAndRetryAllocation(int required_freed_bytes,
+  V8_WARN_UNUSED_RESULT bool ContributeToSweepingMain(int required_freed_bytes,
                                                       int max_pages,
                                                       int size_in_bytes,
                                                       AllocationOrigin origin);
 
-  // Slow path of AllocateRaw. This function is space-dependent. Returns false
-  // if there is not enough space and the caller has to retry after
+  // Refills LAB for EnsureLabMain. This function is space-dependent. Returns
+  // false if there is not enough space and the caller has to retry after
   // collecting garbage.
-  V8_WARN_UNUSED_RESULT virtual bool SlowRefillLinearAllocationArea(
-      int size_in_bytes, AllocationOrigin origin);
+  V8_WARN_UNUSED_RESULT virtual bool RefillLabMain(int size_in_bytes,
+                                                   AllocationOrigin origin);
 
-  // Implementation of SlowAllocateRaw. Returns false if there is not enough
-  // space and the caller has to retry after collecting garbage.
-  V8_WARN_UNUSED_RESULT bool RawSlowRefillLinearAllocationArea(
-      int size_in_bytes, AllocationOrigin origin);
+  // Actual implementation of refilling LAB. Returns false if there is not
+  // enough space and the caller has to retry after collecting garbage.
+  V8_WARN_UNUSED_RESULT bool RawRefillLabMain(int size_in_bytes,
+                                              AllocationOrigin origin);
 
   V8_WARN_UNUSED_RESULT base::Optional<std::pair<Address, size_t>>
   TryAllocationFromFreeListBackground(LocalHeap* local_heap,
@@ -449,8 +441,8 @@ class V8_EXPORT_PRIVATE CompactionSpace : public LocalSpace {
   }
 
  protected:
-  V8_WARN_UNUSED_RESULT bool SlowRefillLinearAllocationArea(
-      int size_in_bytes, AllocationOrigin origin) override;
+  V8_WARN_UNUSED_RESULT bool RefillLabMain(int size_in_bytes,
+                                           AllocationOrigin origin) override;
 };
 
 // A collection of |CompactionSpace|s used by a single compaction task.
@@ -554,8 +546,8 @@ class V8_EXPORT_PRIVATE OffThreadSpace : public LocalSpace {
   }
 
  protected:
-  V8_WARN_UNUSED_RESULT bool SlowRefillLinearAllocationArea(
-      int size_in_bytes, AllocationOrigin origin) override;
+  V8_WARN_UNUSED_RESULT bool RefillLabMain(int size_in_bytes,
+                                           AllocationOrigin origin) override;
 
   void RefillFreeList() override;
 };

test/cctest/heap/test-heap.cc

@@ -5461,8 +5461,8 @@ AllocationResult HeapTester::AllocateByteArrayForTest(
 }
 
 bool HeapTester::CodeEnsureLinearAllocationArea(Heap* heap, int size_in_bytes) {
-  return heap->code_space()->EnsureLinearAllocationArea(
-      size_in_bytes, AllocationOrigin::kRuntime);
+  return heap->code_space()->EnsureLabMain(size_in_bytes,
+                                           AllocationOrigin::kRuntime);
 }
 
 HEAP_TEST(Regress587004) {