need ideas on how to debug code generator

Ram Bhamidipaty <rambham@gmail.com>
Sun, 24 Feb 2008 21:47:50 -0800

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need ideas on how to debug code generator rambham@gmail.com (Ram Bhamidipaty) (2008-02-24)
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Re: need ideas on how to debug code generator bc@freeuk.com (Bartc) (2008-02-27)
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From: Ram Bhamidipaty <rambham@gmail.com>
Newsgroups: comp.compilers
Date: Sun, 24 Feb 2008 21:47:50 -0800
Organization: Compilers Central
Keywords: code, errors, question
Posted-Date: 25 Feb 2008 09:56:45 EST

Hi,


I have a small code generator - for 32 bit x86 machines, unfortunately it
has some bugs :-(. My problem is that the generated code fails
"once in a while" sometimes it can go for 20-40 iterations before failing.


I have a collection of test cases where I verify the correctness of
various simple constructs -- things like load, store, add, sub, etc.
Those all pass.


The test case in question generates a code sequence of about 400 bytes. It
fails by seg faulting, unfortunately gdb is unable to print out a
useful stack trace.


What are some techniques that people have used for debugging code
generators?


-Ram

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