for review (M): 6912062 disassembler plugin needs to produce symbolic information in product mode
John.Rose at Sun.COM
Sat Dec 19 00:26:26 PST 2009
I've been working on dynamic language performance tuning lately, and have found that the product-mode disassembler is deficient.
The disassembler plugin uses certain JVM functions to display information about values (especially managed pointers) embedded in the disassembled code. Unfortunately, in the product build, many of these functions are stubbed out, and produce no output. This leaves puzzling blank spaces in the disassembled code produced by the JVM. This is true in the product build, which is the default and often the only build available.
Fortunately, it is a simple matter to move those functions into the product build. There are not many of them, and they are not complex, so the footprint impact is minimal.
More information about the hotspot-compiler-dev