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diff src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20304:a22acf6d7598

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8048112: G1 Full GC needs to support the case when the very first region is not available Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett. Reviewed-by: brutisso
author tschatzl
date Mon, 21 Jul 2014 10:00:31 +0200
parents f3aeae1f9fc5
children 755930f931e3
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Mon Jul 21 09:59:54 2014 +0200
+++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Mon Jul 21 10:00:31 2014 +0200
@@ -2957,10 +2957,17 @@
   }
 }
 
-CompactibleSpace* G1CollectedHeap::first_compactible_space() {
-  return n_regions() > 0 ? region_at(0) : NULL;
-}
-
+HeapRegion* G1CollectedHeap::next_compaction_region(const HeapRegion* from) const {
+  // We're not using an iterator given that it will wrap around when
+  // it reaches the last region and this is not what we want here.
+  for (uint index = from->hrs_index() + 1; index < n_regions(); index++) {
+    HeapRegion* hr = region_at(index);
+    if (!hr->isHumongous()) {
+      return hr;
+    }
+  }
+  return NULL;
+}
 
 Space* G1CollectedHeap::space_containing(const void* addr) const {
   Space* res = heap_region_containing(addr);