purify and python

[Ralph Heinkel]

Hi, 

since I wrote some C, C++, and F77 extensions for python, I am planning
to use purify to test them for memory leaks and so on.
The problem is that I cannot get a purified version of python running.
Python seems to start and immediately exit with error code -1 (255),
without printing any error message (See below for log). I never get
to the python command line.

The way I linked python is shown below. Linking python without purify
(without any other recompilation) produces a working python version.

Any clue? 

I am running python 1.5.2 on IRIX 6.5 (R10000) with purify 4.1. Python
was configure with  --with-thread  and  --without-gcc

Ralph

---------------------------------------------------------------------

Modules/Setup is:

# Pure module.  Cannot be linked dynamically.
# -DWITH_QUANTIFY, -DWITH_PURIFY, or -DWITH_ALL_PURE
WHICH_PURE_PRODUCTS=-DWITH_PURIFY
PURE_INCLS=-I/usr/pure/purify
PURE_STUBLIBS=-L/usr/pure/purify -lpurify_stubs -lquantify_stubs
pure puremodule.c $(WHICH_PURE_PRODUCTS) $(PURE_INCLS) $(PURE_STUBLIBS)

The (python) modules are linked statically, i.e. *shared* not used


This is how I linked it:

birdie:src/Python-1.5.2/Modules$ purify -windows=no cc -g  python.o \
 ../libpython1.5.a -DWITH_PURIFY -I/usr/pure/purify -L/usr/pure/purify \
 -lpurify_stubs_n32 -lpthread -lmpc -lm  -o python

ld32: WARNING 84: /usr/lib32/mips4/libmpc.a is not used for resolving 
any symbol.
Purify 4.1 IRIX6, Copyright (C) 1992-1997 Rational Software Corp. All 
rights reserved. 
.... Processing "/usr/pure/purify/libpurify_stubs_n32.so"
.... Processing "/usr/lib32/libpthread.so"
.... Processing "/usr/lib32/libm.so"
.... Processing "/usr/lib32/libc.so.1"
.... Processing "python"



This is the output:

birdie:src/Python-1.5.2/Modules$ ./python 
****  Purify instrumented ./python (pid 63792545 at Mon Jan 10 11:48:44 2000)
  * Purify 4.1 IRIX6, Copyright (C) 1992-1997 Rational Software Corp. 
All rights reserved. 
  * For contact information type: "purify -help"
  * Command-line: ./python 
  * Options settings: -purify -windows=no -purify-home=/usr/pure/purify 
  * Purify licensed to European Molecular Biology La
  * Purify checking enabled.

****  Purify instrumented ./python (pid 63792545)  ****
Current file descriptors in use: 5
FIU: file descriptor 0: <stdin>
FIU: file descriptor 1: <stdout>
FIU: file descriptor 2: <stderr>
FIU: file descriptor 26: <reserved for Purify internal use>
FIU: file descriptor 27: <reserved for Purify internal use>

****  Purify instrumented ./python (pid 63792545)  ****
Purify: Searching for all memory leaks...

****  Purify instrumented ./python (pid 63792545)  ****
SIG: Signal handled:
  * This is occurring while in:
        _x_open        [open.s:16]
        _exit          [syscalls.c:5478]
        exit_certain   [fork.c:202]
        _SGIPT_libc_exit [fork.c:253]
        ptctl          [libcthread.c:149]
        __exit         [cuexit.c:60]
  * Received signal 48 (SIGReserved48 - System reserved signal 48)
  * Handler function: 
        sched_handler  [vp.c:243]
  * Signal mask: (SIGReserved48) 
  * Pending signals: 
Memory leaked: 0 bytes (0%); potentially leaked: 2048 bytes (1.12%)

PLK: 2048 bytes potentially leaked at 0x1010c558
  * This memory was allocated from:
        _malloc        [malloc.c:886]
        vp_alloc       [vp.c:1214]

Purify Heap Analysis (combining suppressed and unsuppressed blocks)
                         Blocks      Bytes
              Leaked          0          0
  Potentially Leaked          1       2048
              In-Use          4     180236
  ----------------------------------------
     Total Allocated          5     182284

****  Purify instrumented ./python (pid 63792545)  ****
  * Program exited with status code -1.
  * 1 access error, 1 total occurrence.
  * 0 bytes leaked.
  * 2048 bytes potentially leaked.
  * Basic memory usage (including Purify overhead):
     2179072 code
      169108 data/bss
      195436 heap (peak use)
        4960 stack
  * Shared library memory usage (including Purify overhead):
      425984 rtlib_n32.so (shared code)
       57812 rtlib_n32.so (private data)
       16384 libpurify_stubs_n32.so.pure (shared code)
         160 libpurify_stubs_n32.so.pure (private data)
      212992 libpthread.so.pure.1b7a5a8a8 (shared code)
        3680 libpthread.so.pure.1b7a5a8a8 (private data)
      475136 libm.so.pure.18462ee2e (shared code)
       95696 libm.so.pure.18462ee2e (private data)
     2883584 libc.so.1.pure.9f4e4221 (shared code)
       70640 libc.so.1.pure.9f4e4221 (private data)
  * Memory mapped usage:
       49152 mmap'd at 0x4888000
     1425408 mmap'd at 0x48c8000
      262144 mmap'd at 0x4714000
       49152 mmap'd at 0x4020000
     4259840 mmap'd at 0x42f4000
       20480 mmap'd at 0x48b0000

-- 
------------------------------------------------------
Ralph Heinkel
European Molecular Biology Laboratory (EMBL)
Meyerhofstr. 1
69012 Heidelberg
Tel. +49 6221/387 529
eMail: heinkel at embl-heidelberg.de