Wednesday, March 10, 2010


Sometimes seeing the actual assembly code that hotspot creates can be very helpful. "-XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly" should do the trick.
But you will probably get the following message:

Could not load hsdis-i386.dll; library not loadable; PrintAssembly is disabled

This happens when the library that does the actual disassembly is missing.
Building this library can be really tricky, especially on Windows. Here is a precompiled binary: (Windows x86)


  1. Thanks a ton. This was very helpful. It saved me lot of time and trouble.

  2. Thanks a lot! It really helps.

  3. Do you have the hsdis-amd64.dll ? Thanks

  4. I got it here:

  5. where to place this .dll file?

  6. Where I have to put this file?


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