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73 lines
3.2 KiB
Plaintext
73 lines
3.2 KiB
Plaintext
Purify (tm) and Quantify (tm) are commercial software quality
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assurance tools available from Pure Atria Corporation
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<http://www.pureatria.com/>. Purify is essentially a memory access
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verifier and leak detector; Quantify is a C level profiler. The rest
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of this file assumes you generally know how to use Purify and
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Quantify, and that you have installed valid licenses for these
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products. If you don't have them installed, you can ignore the
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following since it won't help you a bit!
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You can easily build a Purify or Quantify instrumented version of the
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Python interpreter by passing the LINKCC variable to the make command
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at the top of the Python tree:
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make LINKCC='purify gcc'
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This assumes that the `purify' program is on your $PATH, and that you
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are using gcc as your C compiler. Note that you can't Purify and
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Quantify the interpreter (or any program) at the same time.
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Now, just run the interpreter as you normally would. If you're
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running it in place (i.e. not installed), you may find it helpful to
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set your PYTHONPATH environment variable. E.g., in Bourne Shell, on a
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Solaris 2.x machine:
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% PYTHONPATH=./Lib:./Lib/sunos5:./Lib/tkinter:./Modules ./python
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When running the regression test (make test), I have found it useful
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to set my PURIFYOPTIONS environment variable using the following shell
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function. Check out the Purify documentation for details:
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p() {
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chainlen='-chain-length=12'
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ignoresigs='-ignore-signals="SIGHUP,SIGINT,SIGQUIT,SIGILL,SIGTRAP,SIGAVRT,SIGEMT,SIGFPE,SIGKILL,SIGBUS,SIGSEGV,SIGPIPE,SIGTERM,SIGUSR1,SIGUSR2,SIGPOLL,SIGXCPU,SIGXFSZ,SIGFREEZE,SIGTHAW,SIGRTMIN,SIGRTMAX"'
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followchild='-follow-child-processes=yes'
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threads='-max-threads=50'
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export PURIFYOPTIONS="$chainlen $ignoresigs $followchild $threads"
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echo $PURIFYOPTIONS
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}
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Note that you may want to crank -chain-length up even further. A
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value of 20 should get you the entire stack up into the Python C code
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in all situations.
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With the regression test, you'll probably get a gabillion UMR errors,
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and a few MLK errors. I think most of these can be safely suppressed
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by putting the following in your .purify file:
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suppress umr ...; "socketmodule.c"
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suppress umr ...; time_strftime
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suppress umr ...; "dbmmodule.c"
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suppress umr ...; "gdbmmodule.c"
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suppress umr ...; "grpmodule.c"
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suppress umr ...; "nismodule.c"
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suppress umr ...; "pwdmodule.c"
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This will still leave you (currently) with a few UMR and MLK reports.
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For now, don't worry about them. We'll be evaluating these as time
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goes on, and correcting them as appropriate.
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Using Purify or Quantify in this way will give you coarse grained
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reports on the whole Python interpreter. You can actually get more
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fine grained control over both by linking with the optional `pure'
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module, which exports (most of) the Purify and Quantify C API's into
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Python. To link in this module (it must be statically linked), edit
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your Modules/Setup file for your site, and rebuild the interpreter.
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You might want to check out the comments in the Modules/puremodule.c
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file for some idiosyncrasies.
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Using this module, you can actually profile or leak test a small
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section of code, instead of the whole interpreter. Using this in
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conjuction with pdb.py, dbx, or the profiler.py module really gives
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you quite a bit of introspective power.
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