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Re: how to debug this strange load problem
From: |
frank wang |
Subject: |
Re: how to debug this strange load problem |
Date: |
Wed, 30 Aug 2006 12:20:44 -0700 |
It is time to give up. After spending so much time, I could not fix this problem. Here is summary what I have done.
1) By following John's suggestion, I tried to recompile the code with -ggdb3. It took about one day and finally it gave me the following errors: in attaced file result.txt
2)Without the success to recompile the code, I used gdb to debug the code with the original build. After stepping through the code, I found that by typing command in octave load test2.txt. Octave in load-save.cc could not find the correct format, so variable format = LS_UNKNOWN. Then Octave returns without read the data.
I tried to force format = LS_ASCII, octave can continue to do_load. The orig_fname contains
$54 = (const string &) @0xbfa64b84: {static npos = 4294967295,
_M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x8f7104c "
test2.txt"}}
You can see the file name. Then, inside do_load, it go to read_ascii_data, the extract_name did not get the file name and the name is empty, so it prints:
load: empty name keyword or no data found in file `test2.txt'.
My /usr/lib/libstdc++.so.6 -> libstdc++.so.6.0.8.
Thanks
Frank
On 8/29/06, John W. Eaton <address@hidden> wrote:
On 29-Aug-2006, frank wang wrote:
| Could you specify how to set the flag -ggdb3? Is this in makefile or
| configure?
You can use
./configure CXXFLAGS="-ggdb3"
make
| Also, how can I find the version of libstdc++ and libstdc++?
ldd full/path/to/octave
will show you something like
...
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00002ad07cb99000)
libc.so.6 => /lib/libc.so.6 (0x00002ad07cd9b000)
Then
$ ls -l /usr/lib/libstdc++.so.6
lrwxrwxrwx 1 root root 18 Jul 12 13:11 /usr/lib/libstdc++.so.6 -> libstdc++.so.6.0.8
$ ls -l /lib/libc.so.6
lrwxrwxrwx 1 root root 13 Jun 28 12:51 /lib/libc.so.6 -> libc-2.3.6.so
| After I build octave with -ggdb3, is this correct procedure to setup the
| debug process?
| 1) run gdb octave
| 2) inside gdb, set break point at the load function
| 3) inside gdb, run
|
| Could you tell me the file name containing load function source code?
The file is load-save.cc
, the function is Fload (the F prefix is a
coding convention, enforced by the DEFUN macro).
BTW, if you do find that the problem is due to a bug in the compiler
or libraries, then we can't help you fix that other than to tell you
to install a newer/different version. So maybe you should start by
installing the latest GCC? 4.1.0 was the first release in a series
and there has been a bug-fix release since.
jwe
result.txt
Description: Text document
- how to debug this strange load problem, frank wang, 2006/08/29
- Re: how to debug this strange load problem, David Bateman, 2006/08/29
- Re: how to debug this strange load problem, frank wang, 2006/08/29
- Re: how to debug this strange load problem, John W. Eaton, 2006/08/29
- Re: how to debug this strange load problem, frank wang, 2006/08/29
- Re: how to debug this strange load problem, John W. Eaton, 2006/08/29
- Re: how to debug this strange load problem,
frank wang <=
- Re: how to debug this strange load problem, John W. Eaton, 2006/08/30
- Re: how to debug this strange load problem, frank wang, 2006/08/31
- Re: how to debug this strange load problem, Przemek Klosowski, 2006/08/29
- Re: how to debug this strange load problem, frank wang, 2006/08/29
Re: how to debug this strange load problem, Joe Koski, 2006/08/29