XMLWordPrintable

    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 15
    • Fix Version/s: 15
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
    • Resolved In Build:
      b19

      Description

      This is fairly straight forward. The small amount of javascript code calls into a helper method already written in JSJavaScriptEngine.java, so mostly it's just moving this java code to CommandProcessor.java, and reworking it a bit:

      From sa.js:
          this.dclass = function(clazz, dir) {
            if (!clazz) {
               writeln("Usage: dumpclass { address | name } [ directory ]");
            } else {
               if (!dir) { dir = "."; }
               dumpClass(clazz, dir);
            }
          }
          registerCommand("dumpclass", "dumpclass { address | name } [ directory ]", "dclass");

      From JSJavaScriptEngine.java:
          public Object dumpClass(Object[] args) {
              if (args.length == 0) {
                  return Boolean.FALSE;
              }
              Object clazz = args[0];
            if (clazz == null) {
                return Boolean.FALSE;
            }
              InstanceKlass ik = null;
              if (clazz instanceof String) {
                  String name = (String) clazz;
                  if (name.startsWith("0x")) {
                      // treat it as address
                      VM vm = VM.getVM();
                      Address addr = vm.getDebugger().parseAddress(name);
                      Metadata metadata = Metadata.instantiateWrapperFor(addr.addOffsetTo(0));
                      if (metadata instanceof InstanceKlass) {
                          ik = (InstanceKlass) metadata;
                      } else {
                          return Boolean.FALSE;
                      }
                  } else {
                      ik = SystemDictionaryHelper.findInstanceKlass((String) clazz);
                  }
              } else if (clazz instanceof JSJavaClass) {
                  JSJavaKlass jk = ((JSJavaClass)clazz).getJSJavaKlass();
                  if (jk != null && jk instanceof JSJavaInstanceKlass) {
                      ik = ((JSJavaInstanceKlass)jk).getInstanceKlass();
                  }
              } else {
                  return Boolean.FALSE;
              }

              if (ik == null) return Boolean.FALSE;
              StringBuffer buf = new StringBuffer();
              if (args.length > 1) {
                  buf.append(args[1].toString());
              } else {
                  buf.append('.');
              }

              buf.append(File.separatorChar);
              buf.append(ik.getName().asString().replace('/', File.separatorChar));
              buf.append(".class");
              String fileName = buf.toString();
              File file = new File(fileName);

              try {
                  int index = fileName.lastIndexOf(File.separatorChar);
                  File dir = new File(fileName.substring(0, index));
                  dir.mkdirs();
                  FileOutputStream fos = new FileOutputStream(file);
                  ClassWriter cw = new ClassWriter(ik, fos);
                  cw.write();
                  fos.close();
              } catch (IOException exp) {
                  printError(exp.toString(), exp);
                  return Boolean.FALSE;
              }

              return Boolean.TRUE;
          }

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              Assignee:
              cjplummer Chris Plummer
              Reporter:
              cjplummer Chris Plummer
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                Dates

                Created:
                Updated:
                Resolved: