Recycle mem-maps for collector transitions.

We now create spaces when we need them for collector transitions or
homogeneous compaction by recycling mem maps. Change the bump
pointer space size to be as large as the heap capacity instead of
1/2 heap capacity like it used to be. For GSS, bump pointer spaces
are set to 32MB currently.

Changed GSS to have main space == non moving space since we don't
need to copy from the main space.

Fixes GC stress tests 074, 096.
Fixed test 080 oom throw with -Xmx2m for GC stress test, this was
broken since it was allocating a 4 MB array before starting the
OOM process.

Bug: 14059466
Bug: 16406852
Change-Id: I62877cfa24ec944a6f34ffac30334f454a8002fd

1 files changed, 4 insertions, 5 deletions

diff --git a/runtime/gc/collector/semi_space.cc b/runtime/gc/collector/semi_space.cc
index c7c567f..8fb33ce 100644
--- a/runtime/gc/collector/semi_space.cc
+++ b/runtime/gc/collector/semi_space.cc
@@ -69,9 +69,9 @@ void SemiSpace::BindBitmaps() {
     } else if (space->GetLiveBitmap() != nullptr) {
       if (space == to_space_ || collect_from_space_only_) {
         if (collect_from_space_only_) {
-          // Bind the main free list space and the non-moving space to the immune space if a bump
-          // pointer space only collection.
-          CHECK(space == to_space_ || space == GetHeap()->GetPrimaryFreeListSpace() ||
+          // Bind the bitmaps of the main free list space and the non-moving space we are doing a
+          // bump pointer space only collection.
+          CHECK(space == GetHeap()->GetPrimaryFreeListSpace() ||
                 space == GetHeap()->GetNonMovingSpace());
         }
         CHECK(space->IsContinuousMemMapAllocSpace());
@@ -222,7 +222,6 @@ void SemiSpace::MarkingPhase() {
   heap_->GetCardTable()->ClearCardTable();
   // Need to do this before the checkpoint since we don't want any threads to add references to
   // the live stack during the recursive mark.
-  t.NewTiming("SwapStacks");
   if (kUseThreadLocalAllocationStack) {
     TimingLogger::ScopedTiming t("RevokeAllThreadLocalAllocationStacks", GetTimings());
     heap_->RevokeAllThreadLocalAllocationStacks(self_);
@@ -492,7 +491,7 @@ mirror::Object* SemiSpace::MarkNonForwardedObject(mirror::Object* obj) {
       // If out of space, fall back to the to-space.
       forward_address = to_space_->AllocThreadUnsafe(self_, object_size, &bytes_allocated, nullptr);
       // No logic for marking the bitmap, so it must be null.
-      DCHECK(to_space_->GetLiveBitmap() == nullptr);
+      DCHECK(to_space_live_bitmap_ == nullptr);
     } else {
       bytes_promoted_ += bytes_allocated;
       // Dirty the card at the destionation as it may contain