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src/hotspot/share/services/metaspaceDCmd.cpp

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rev 49736 : [mq]: metaspace-additions-to-jcmd

@@ -22,15 +22,55 @@
  *
  */
 #include "precompiled.hpp"
 #include "memory/metaspace.hpp"
 #include "services/diagnosticCommand.hpp"
+#include "services/nmtCommon.hpp"
 
-MetaspaceDCmd::MetaspaceDCmd(outputStream* output, bool heap): DCmd(output, heap) {
+
+MetaspaceDCmd::MetaspaceDCmd(outputStream* output, bool heap)
+  : DCmdWithParser(output, heap)
+  , _show_loaders("loaders", "Shows usage by class loader.", "BOOLEAN", false, "false")
+  , _by_chunktype("by_chunktype", "Break down numbers by chunk type.", "BOOLEAN", false, "false")
+  , _by_spacetype("by_spacetype", "Break down numbers by loader type.", "BOOLEAN", false, "false")
+  , _show_vslist("vslist", "Shows details about the virtual space list", "BOOLEAN", false, "false")
+  , _show_vsmap("vsmap", "Shows a map of the virtual spaces", "BOOLEAN", false, "false")
+  , _show_chunk_freelist("chunk-freelist", "Shows details about the free chunk list", "BOOLEAN", false, "false")
+  , _scale("scale", "Memory usage in which to scale. Valid values are: 1, KB, MB or GB (fixed scale) "
+           "or \"dynamic\" for dynamically choosen scale.",
+     "STRING", false, "dynamic")
+{
+  _dcmdparser.add_dcmd_option(&_show_loaders);
+  _dcmdparser.add_dcmd_option(&_by_chunktype);
+  _dcmdparser.add_dcmd_option(&_by_spacetype);
+  _dcmdparser.add_dcmd_option(&_show_vslist);
+  _dcmdparser.add_dcmd_option(&_show_vsmap);
+  _dcmdparser.add_dcmd_option(&_show_chunk_freelist);
+  _dcmdparser.add_dcmd_option(&_scale);
 }
 
 void MetaspaceDCmd::execute(DCmdSource source, TRAPS) {
-  const size_t scale = 1 * K;
-  VM_PrintMetadata op(output(), scale);
+  // Parse scale value.
+  const char* scale_value = _scale.value();
+  size_t scale = 0;
+  if (scale_value != NULL) {
+    if (strcasecmp("dynamic", scale_value) == 0) {
+      scale = 0;
+    } else {
+      scale = NMTUtil::scale_from_name(scale_value);
+      if (scale == 0) {
+        output()->print_cr("Invalid scale: \"%s\". Will use dynamic scaling.", scale_value);
+      }
+    }
+  }
+  // Parse flags.
+  int flags = 0;
+  if (_show_loaders.value())         flags |= MetaspaceUtils::rf_show_loaders;
+  if (_by_chunktype.value())         flags |= MetaspaceUtils::rf_break_down_by_chunktype;
+  if (_by_spacetype.value())         flags |= MetaspaceUtils::rf_break_down_by_spacetype;
+  if (_show_vslist.value())          flags |= MetaspaceUtils::rf_show_vslist;
+  if (_show_vsmap.value())           flags |= MetaspaceUtils::rf_show_vsmap;
+  if (_show_chunk_freelist.value())  flags |= MetaspaceUtils::rf_show_chunk_freelist;
+  VM_PrintMetadata op(output(), scale, flags);
   VMThread::execute(&op);
 }
 
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