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How to see the hotspotted machine codes or corresponding assembly codes?

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Joined: 2005-03-01

are there some vm options to print those codesor corresponding assembly codes? Or can some others profile tools get this runtime machine codes?
ps: the -XX:+PrintCompilation args seem only print which methods have been hotspotted, I'd like to see what the bytecodes were hotspotted into. Is it possible?

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Joined: 2004-01-07

yes, the fastdebug-builds are capable of this. the argument is something like PrintOptoAssembly