src/hotspot/share/services/virtualMemoryTracker.hpp

*** 158,170 ****
    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 VirtualMemorySnapshot* as_snapshot() {
      return (VirtualMemorySnapshot*)_snapshot;
    }
  
--- 158,168 ----
    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 void snapshot(VirtualMemorySnapshot* s);
  
    static VirtualMemorySnapshot* as_snapshot() {
      return (VirtualMemorySnapshot*)_snapshot;
    }
  
*** 334,343 ****
--- 332,344 ----
  
    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;
  
*** 387,396 ****
--- 388,398 ----
  };
  
  // Main class called from MemTracker to track virtual memory allocations, commits and releases.
  class VirtualMemoryTracker : AllStatic {
    friend class VirtualMemoryTrackerTest;
+   friend class ThreadStackTrackingTest;
  
   public:
    static bool initialize(NMT_TrackingLevel level);
  
    // Late phase initialization
*** 406,415 ****
--- 408,420 ----
    // 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;
  };