[Python-Dev] What's the best way to debug python3 source code?

[gmspro]

Hi,

What's the best way to debug python3 source code?
To fix a bug i need to debug source code(C files).
I use gdb to debug.
But how can i get the exact file/point to fix the bug?
How can i know quickly where the bug is?
How can i run python>>> from gdb and giving input there how can i test and 
debug to fix a bug?

Someone please explain/elaborate the process you use/do as usual with examples.

Thanks.
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Re: [Python-Dev] What's the best way to debug python3 source code? (for this bug: http://bugs.python.org/issue15068)

[gmspro]

@martin,

I'm working on this bug, http://bugs.python.org/issue15068
I tried this with gdb
(gdb)run
>>>from sys import stdin
>>>str=sys.stdin.read()
blabla
blabla
blabla
CTRL+D
CTRL+D
>>>CTRL+C
(gdb)backtrace

0xb7f08348 in ___newselect_nocancel () at ../sysdeps/unix/syscall-template.S:82
82    ../sysdeps/unix/syscall-template.S: No such file or directory.
    in ../sysdeps/unix/syscall-template.S
Current language:  auto
The current source language is "auto; currently asm".
(gdb) backtrace
#0  0xb7f08348 in ___newselect_nocancel () at 
../sysdeps/unix/syscall-template.S:82
#1  0xb7b43f9f in readline_until_enter_or_signal (prompt=0xb7b578d0 ">>> ", 
signal=0xbfffed54)
    at /home/user1/python/Python-3.2.3/Modules/readline.c:987
#2  0xb7b440ed in call_readline (sys_stdin=0xb7f84420, sys_stdout=0xb7f844c0, 
prompt=0xb7b578d0 ">>> ")
    at /home/user1/python/Python-3.2.3/Modules/readline.c:1082
#3  0x0811a15b in PyOS_Readline (sys_stdin=0xb7f84420, sys_stdout=0xb7f844c0, 
prompt=0xb7b578d0 ">>> ")
    at ../Parser/myreadline.c:200
#4  0x0811b92d in tok_nextc (tok=0x82e1d08) at ../Parser/tokenizer.c:897
#5  0x0811c39b in tok_get (tok=0x82e1d08, p_start=0xbfffef20, p_end=0xbfffef1c) 
at ../Parser/tokenizer.c:1306
#6  0x0811cda2 in PyTokenizer_Get (tok=0x82e1d08, p_start=0xbfffef20, 
p_end=0xbfffef1c) at ../Parser/tokenizer.c:1687
#7  0x08119866 in parsetok (tok=0x82e1d08, g=0x81df0c0, start=256, 
err_ret=0xbfffefd8, flags=0xbfffefd4)
    at ../Parser/parsetok.c:150
#8  0x081197a6 in PyParser_ParseFileFlagsEx (fp=0xb7f84420, filename=0x818ac7a 
"", enc=0xb7c57750 "UTF-8", g=
    0x81df0c0, start=256, ps1=0xb7b578d0 ">>> ", ps2=0xb7b578e8 "... ", 
err_ret=0xbfffefd8, flags=0xbfffefd4)
    at ../Parser/parsetok.c:100
#9  0x080cb96d in PyParser_ASTFromFile (fp=0xb7f84420, filename=0x818ac7a 
"", enc=0xb7c57750 "UTF-8", start=256, ps1=
    0xb7b578d0 ">>> ", ps2=0xb7b578e8 "... ", flags=0xb194, 
errcode=0xb044, arena=0x8285a50)
    at ../Python/pythonrun.c:1941
#10 0x080c9c9c in PyRun_InteractiveOneFlags (fp=0xb7f84420, filename=0x818ac7a 
"", flags=0xb194)
    at ../Python/pythonrun.c:1175
#11 0x080c99ed in PyRun_InteractiveLoopFlags (fp=0xb7f84420, filename=0x818ac7a 
"", flags=0xb194)
    at ../Python/pythonrun.c:1086
#12 0x080c98b5 in PyRun_AnyFileExFlags (fp=0xb7f84420, filename=0x818ac7a 
"", closeit=0, flags=0xb194)
    at ../Python/pythonrun.c:1055
#13 0x080deb5c in run_file (fp=0xb7f84420, filename=0x0, p_cf=0xb194) at 
../Modules/main.c:307
#14 0x080df5c0 in Py_Main (argc=1, argv=0x81f7008) at ../Modules/main.c:733
#15 0x0805c3d9 in main (argc=1, argv=0xb2f4) at ../Modules/python.c:63

But i can't get any clue which file to look at. 

Thanks
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[Python-Dev] Help to fix this bug http://bugs.python.org/issue15068

[gmspro]

Hi,

I'm working on this bug to fix it. http://bugs.python.org/issue15068

>>> from sys import stdin
>>> str=stdin.read()
hello
hello world
CTRL+D
CTRL+D

Can anyone tell me where is stdin.read() function defined?
Or where is sys.stdin defined?
Or which function is called for str=stdin.read() ?

Thanks

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