src/hotspot/share/services/virtualMemoryTracker.hpp

@@ -158,13 +158,11 @@
   static inline void move_committed_memory(MEMFLAGS from, MEMFLAGS to, size_t size) {
     as_snapshot()->by_type(from)->uncommit_memory(size);
     as_snapshot()->by_type(to)->commit_memory(size);
   }
 
-  static inline void snapshot(VirtualMemorySnapshot* s) {
-    as_snapshot()->copy_to(s);
-  }
+  static void snapshot(VirtualMemorySnapshot* s);
 
   static VirtualMemorySnapshot* as_snapshot() {
     return (VirtualMemorySnapshot*)_snapshot;
   }
 

@@ -336,10 +334,13 @@
 
   inline bool equals(const ReservedMemoryRegion& rgn) const {
     return compare(rgn) == 0;
   }
 
+  // uncommitted thread stack bottom, above guard pages if there is any.
+  address thread_stack_uncommitted_bottom() const;
+
   bool    add_committed_region(address addr, size_t size, const NativeCallStack& stack);
   bool    remove_uncommitted_region(address addr, size_t size);
 
   size_t  committed_size() const;
 

@@ -413,10 +414,13 @@
   // Walk virtual memory data structure for creating baseline, etc.
   static bool walk_virtual_memory(VirtualMemoryWalker* walker);
 
   static bool transition(NMT_TrackingLevel from, NMT_TrackingLevel to);
 
+  // Snapshot current thread stacks
+  static void snapshot_thread_stacks();
+
  private:
   static SortedLinkedList<ReservedMemoryRegion, compare_reserved_region_base>* _reserved_regions;
 };