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Unified Diff: runtime/vm/freelist.cc

Issue 792163003: Deletion barrier preparation: validate overwritten references. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 5 years, 12 months ago
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Index: runtime/vm/freelist.cc
===================================================================
--- runtime/vm/freelist.cc (revision 42583)
+++ runtime/vm/freelist.cc (working copy)
@@ -26,6 +26,9 @@
uword tags = 0;
tags = RawObject::SizeTag::update(size, tags);
tags = RawObject::ClassIdTag::update(kFreeListElement, tags);
+ // All words in a freelist element header must look like smis; see
+ // TryAllocateSmiInitializedLocked.
+ ASSERT(!reinterpret_cast<RawObject*>(tags)->IsHeapObject());
result->tags_ = tags;
if (size > RawObject::SizeTag::kMaxSizeTag) {
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