8343893: Test jdk/jfr/event/runtime/TestNativeMemoryUsageEvents.java failed: heap should have grown and NMT should show that: expected 0 > 0

Reviewed-by: gziemski, mgronlun, lmesnik

src/hotspot/share/nmt/memoryFileTracker.cpp

@@ -179,15 +179,11 @@ const GrowableArrayCHeap<MemoryFileTracker::MemoryFile*, mtNMT>& MemoryFileTrack
 };
 
 void MemoryFileTracker::summary_snapshot(VirtualMemorySnapshot* snapshot) const {
-  for (int d = 0; d < _files.length(); d++) {
-    const MemoryFile* file = _files.at(d);
-    for (int i = 0; i < mt_number_of_tags; i++) {
-      VirtualMemory* snap = snapshot->by_type(NMTUtil::index_to_tag(i));
-      const VirtualMemory* current = file->_summary.by_type(NMTUtil::index_to_tag(i));
-      // Only account the committed memory.
-      snap->commit_memory(current->committed());
-    }
-  }
+  iterate_summary([&](MemTag tag, const VirtualMemory* current) {
+    VirtualMemory* snap = snapshot->by_type(tag);
+    // Only account the committed memory.
+    snap->commit_memory(current->committed());
+  });
 }
 
 void MemoryFileTracker::Instance::summary_snapshot(VirtualMemorySnapshot* snapshot) {

src/hotspot/share/nmt/memoryFileTracker.hpp

@@ -39,6 +39,8 @@
 // The MemoryFileTracker tracks memory of 'memory files',
 // storage with its own memory space separate from the process.
 // A typical example of such a file is a memory mapped file.
+// All memory is accounted as committed, there is no reserved memory.
+// Any reserved memory is expected to exist in the VirtualMemoryTracker.
 class MemoryFileTracker {
   friend class NMTMemoryFileTrackerTest;
 
@@ -72,6 +74,16 @@ public:
   MemoryFile* make_file(const char* descriptive_name);
   void free_file(MemoryFile* file);
 
+  template<typename F>
+  void iterate_summary(F f) const {
+    for (int d = 0; d < _files.length(); d++) {
+      const MemoryFile* file = _files.at(d);
+      for (int i = 0; i < mt_number_of_tags; i++) {
+        f(NMTUtil::index_to_tag(i), file->_summary.by_type(NMTUtil::index_to_tag(i)));
+      }
+    }
+  }
+
   void summary_snapshot(VirtualMemorySnapshot* snapshot) const;
 
   // Print detailed report of file
@@ -99,6 +111,11 @@ public:
                                 const NativeCallStack& stack, MemTag mem_tag);
     static void free_memory(MemoryFile* device, size_t offset, size_t size);
 
+    template<typename F>
+    static void iterate_summary(F f) {
+      _tracker->iterate_summary(f);
+    };
+
     static void summary_snapshot(VirtualMemorySnapshot* snapshot);
 
     static void print_report_on(const MemoryFile* device, outputStream* stream, size_t scale);

src/hotspot/share/nmt/nmtUsage.cpp

@@ -24,6 +24,7 @@
 
 #include "precompiled.hpp"
 #include "nmt/mallocTracker.hpp"
+#include "nmt/memoryFileTracker.hpp"
 #include "nmt/nmtCommon.hpp"
 #include "nmt/nmtUsage.hpp"
 #include "nmt/threadStackTracker.hpp"
@@ -90,6 +91,16 @@ void NMTUsage::update_vm_usage() {
     _vm_total.reserved += vm->reserved();
     _vm_total.committed += vm->committed();
   }
+
+  { // MemoryFileTracker addition
+    using MFT = MemoryFileTracker::Instance;
+    MFT::Locker lock;
+    MFT::iterate_summary([&](MemTag tag, const VirtualMemory* vm) {
+      int i = NMTUtil::tag_to_index(tag);
+      _vm_by_type[i].committed += vm->committed();
+      _vm_total.committed += vm->committed();
+    });
+  }
 }
 
 void NMTUsage::refresh() {

src/hotspot/share/nmt/nmtUsage.hpp

@@ -26,6 +26,7 @@
 #define SHARE_NMT_NMTUSAGE_HPP
 
 #include "memory/allocation.hpp"
+#include "nmt/memTag.hpp"
 #include "utilities/globalDefinitions.hpp"
 
 struct NMTUsagePair {

test/jdk/ProblemList-zgc.txt

@@ -38,5 +38,3 @@ sun/tools/jhsdb/heapconfig/JMapHeapConfigTest.java 8307393   generic-all
 sun/tools/jhsdb/HeapDumpTestWithActiveProcess.java 8307393   generic-all
 
 com/sun/jdi/ThreadMemoryLeakTest.java          8307402 generic-all
-
-jdk/jfr/event/runtime/TestNativeMemoryUsageEvents.java   8343893 generic-all