6711316: Open source the Garbage-First garbage collector

Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr

1 files changed, 114 insertions, 0 deletions

diff --git a/src/share/vm/gc_implementation/g1/vm_operations_g1.hpp b/src/share/vm/gc_implementation/g1/vm_operations_g1.hpp
new file mode 100644
index 000000000..a914cea3b
--- /dev/null
+++ b/src/share/vm/gc_implementation/g1/vm_operations_g1.hpp
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// VM_operations for the G1 collector.
+// VM_GC_Operation:
+//   - VM_CGC_Operation
+//   - VM_G1CollectFull
+//   - VM_G1CollectForAllocation
+//   - VM_G1IncCollectionPause
+//   - VM_G1PopRegionCollectionPause
+
+class VM_G1CollectFull: public VM_GC_Operation {
+ private:
+ public:
+  VM_G1CollectFull(int gc_count_before,
+                   GCCause::Cause gc_cause)
+    : VM_GC_Operation(gc_count_before)
+  {
+    _gc_cause = gc_cause;
+  }
+  ~VM_G1CollectFull() {}
+  virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
+  virtual void doit();
+  virtual const char* name() const {
+    return "full garbage-first collection";
+  }
+};
+
+class VM_G1CollectForAllocation: public VM_GC_Operation {
+ private:
+  HeapWord*   _res;
+  size_t      _size;                       // size of object to be allocated
+ public:
+  VM_G1CollectForAllocation(size_t size, int gc_count_before)
+    : VM_GC_Operation(gc_count_before) {
+    _size        = size;
+    _res         = NULL;
+  }
+  ~VM_G1CollectForAllocation()        {}
+  virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
+  virtual void doit();
+  virtual const char* name() const {
+    return "garbage-first collection to satisfy allocation";
+  }
+  HeapWord* result() { return _res; }
+};
+
+class VM_G1IncCollectionPause: public VM_GC_Operation {
+ public:
+  VM_G1IncCollectionPause(int gc_count_before) :
+    VM_GC_Operation(gc_count_before) {}
+  virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
+  virtual void doit();
+  virtual const char* name() const {
+    return "garbage-first incremental collection pause";
+  }
+};
+
+class VM_G1PopRegionCollectionPause: public VM_GC_Operation {
+  HeapRegion* _pop_region;
+ public:
+  VM_G1PopRegionCollectionPause(int gc_count_before, HeapRegion* pop_region) :
+    VM_GC_Operation(gc_count_before),
+    _pop_region(pop_region)
+  {}
+  virtual VMOp_Type type() const { return VMOp_G1PopRegionCollectionPause; }
+  virtual void doit();
+  virtual const char* name() const {
+    return "garbage-first popular region collection pause";
+  }
+};
+
+// Concurrent GC stop-the-world operations such as initial and final mark;
+// consider sharing these with CMS's counterparts.
+class VM_CGC_Operation: public VM_Operation {
+  VoidClosure* _cl;
+  const char* _printGCMessage;
+ public:
+  VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) :
+    _cl(cl),
+    _printGCMessage(printGCMsg)
+    {}
+
+  ~VM_CGC_Operation() {}
+
+  virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
+  virtual void doit();
+  virtual bool doit_prologue();
+  virtual void doit_epilogue();
+  virtual const char* name() const {
+    return "concurrent gc";
+  }
+};