src/hotspot/share/services/diagnosticCommand.cpp

rev 58893 : 8237354: Add option to jcmd to write a gzipped heap dump
Reviewed-by:

*** 502,522 ****
  #if INCLUDE_SERVICES // Heap dumping/inspection supported
  HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) :
                             DCmdWithParser(output, heap),
    _filename("filename","Name of the dump file", "STRING",true),
    _all("-all", "Dump all objects, including unreachable objects",
!        "BOOLEAN", false, "false") {
    _dcmdparser.add_dcmd_option(&_all);
    _dcmdparser.add_dcmd_argument(&_filename);
  }
  
  void HeapDumpDCmd::execute(DCmdSource source, TRAPS) {
    // Request a full GC before heap dump if _all is false
    // This helps reduces the amount of unreachable objects in the dump
    // and makes it easier to browse.
    HeapDumper dumper(!_all.value() /* request GC if _all is false*/);
!   dumper.dump(_filename.value(), output());
  }
  
  int HeapDumpDCmd::num_arguments() {
    ResourceMark rm;
    HeapDumpDCmd* dcmd = new HeapDumpDCmd(NULL, false);
--- 502,538 ----
  #if INCLUDE_SERVICES // Heap dumping/inspection supported
  HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) :
                             DCmdWithParser(output, heap),
    _filename("filename","Name of the dump file", "STRING",true),
    _all("-all", "Dump all objects, including unreachable objects",
!        "BOOLEAN", false, "false"),
!   _gzip("-gz", "Write in gzipped format.", "BOOLEAN", false, "false"),
!   _gzip_level("-gz-level", "The compression level from 0 (store) to 9 (best) when writing in gzipped format.",
!               "INT", false, "1") {
    _dcmdparser.add_dcmd_option(&_all);
    _dcmdparser.add_dcmd_argument(&_filename);
+   _dcmdparser.add_dcmd_option(&_gzip);
+   _dcmdparser.add_dcmd_option(&_gzip_level);
  }
  
  void HeapDumpDCmd::execute(DCmdSource source, TRAPS) {
+   jlong level = -1; // -1 means no compression.
+ 
+   if (_gzip.value()) {
+     level = _gzip_level.value();
+ 
+     if (level < 0 || level > 9) {
+       output()->print_cr("Compression level out of range (0-9): " JLONG_FORMAT, level);
+       return;
+     }
+   }
+ 
    // Request a full GC before heap dump if _all is false
    // This helps reduces the amount of unreachable objects in the dump
    // and makes it easier to browse.
    HeapDumper dumper(!_all.value() /* request GC if _all is false*/);
!   dumper.dump(_filename.value(), output(), (int) level);
  }
  
  int HeapDumpDCmd::num_arguments() {
    ResourceMark rm;
    HeapDumpDCmd* dcmd = new HeapDumpDCmd(NULL, false);