[PATCH] JDK-8176571: Fine bitmaps should be allocated as belonging to mtGC

[Milan Mimica]

Just fixing the subject


________________________________
From: hotspot-gc-dev <hotspot-gc-dev-bounces at openjdk.java.net> on behalf of Milan Mimica <Milan.Mimica at infobip.com>
Sent: Sunday, May 21, 2017 13:12
To: hotspot-gc-dev at openjdk.java.net
Subject: RFR(XS) JDK-8176571:


Hello


Here is my attempt to fix https://bugs.openjdk.java.net/browse/JDK-8176571. The same applies to jdk9 and 10.

It changes the NMT category of CHeapBitMap which is used only in G1 code. Given that the class is defined in "share" scope, and it may be used elsewhere in the future, perhaps it should be made made a template? That will add more boilerplate code to g1 sources.


--- old/src/share/vm/utilities/bitMap.cpp    2017-05-21 13:09:15.350905240 +0200
+++ new/src/share/vm/utilities/bitMap.cpp    2017-05-21 13:09:15.286905238 +0200
@@ -48,10 +48,10 @@
 class CHeapBitMapAllocator : StackObj {
  public:
   bm_word_t* allocate(size_t size_in_words) const {
-    return ArrayAllocator<bm_word_t, mtInternal>::allocate(size_in_words);
+    return ArrayAllocator<bm_word_t, mtGC>::allocate(size_in_words);
   }
   void free(bm_word_t* map, idx_t size_in_words) const {
-    ArrayAllocator<bm_word_t, mtInternal>::free(map, size_in_words);
+    ArrayAllocator<bm_word_t, mtGC>::free(map, size_in_words);
   }
 };

Milan Mimica, Senior Software Engineer / Division Lead

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