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pht92gee@hotmail.com | 5 Apr 2002 07:43
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School Shows

Hey there, I found this web site that gives some good sources for doing more with the school聮s web site.  Let
me know what you think.

http://www.schoolshows.com/resources.htm

Bradley Smith
Educator
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tony | 11 Apr 2002 15:03

信息更新!更多优惠!


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Jeremy Mullin | 11 Apr 2002 15:52

5.1.1 debugging multithreaded app

Hello All,

  I've been using gdb 5.0 for the last year or so. This week I built 5.1.1 and tried it out. In 5.0 when I started my
multi-threaded application it reported each thread as it was created, and I had no problems setting
breakpoints in any thread, or getting thread info.
  With 5.1.1 when the application starts gdb only shows one process, and if I try 'info threads' I get 

../../gdb/lin-lwp.c:1292: gdb-internal-error: lin_lwp_thread_alive: Assertion `is_lwp (ptid)' failed.
An internal GDB error was detected.

  I'm wondering if I needed to do something special before building gdb to make gdb handle multiple threads? I
just did the standard 'make config', 'make all', 'make install'.

  TIA,
   J.D.
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Shanmugam Dhayanand | 17 Apr 2002 13:01
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Very Urgent help!!!

Hi

I ran a 'c' code in HP-UX and met with a crash. the
GDB says this.

Program terminated with signal 10, Bus Error

When I backtrace this is wat i get

#0 add_to_int_chain () at internalpacking.c 69
#1 0x1085c in get_pick_by_int () from
/root/bin/int_serv
.
.
.
#10 0x388c in main (argc=13, argv=0x7efe0d40) at
main.c:77

But (internalpacking.c 69) line 69 is empty line in
the file internalpacking.c.

Any probable reasons for the error. please reply imm.
Error occuring in production.

Thanks
Dhayanand

__________________________________________________
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Yahoo! Tax Center - online filing with TurboTax
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Gauthier, Dave | 24 Apr 2002 16:49
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GDB/DDD problems when linking to object lib not created with -g

Hi:

I'm working on a Tru64 machine, writing in C with embedded SQL calls.  It
needs to be linked to an .so supplied by Oracle in order for the thing to
work.  I get SIGTRAP and SIGILL and SIGSEGV and other errors when I try to
run the program under debug, but only if I try stepping through (never see
any of these errors if I simply RUN).  Anyway, in my experiments, I actually
stripped away all the Oracle/SQL stuff leaving a very simple, pure C program
which just has 2 printf statements.. a "Hi\n" and a "Bye\n".  The
compilation looks like...

	cc -o test_dbg -g2 test_dbg.c -L$ORACLE_HOME/lib -lclntsh 

The simple program fails with one of the 3 messages I cited.  Behavior is
unpredictable, any one of the messages may pop up, or, sometimes none (the
program runs).  But it usually fails.  Also seen at times was a "heuristic
fencepost" limit problem.  But a "show heuristic-fence-post" shows "0" (no
limit).

If I get rid of the link to the libclntsh.so, GDB and DDD run fine.  Mind
you, the simple 2-line program never calls anything in the .so, but simply
linking to it causes the problem.  libclntsh.so was provided to us by
Oracle.  It's not the kind of thing that I can recreate with -g (which might
fix the problem).  In other words, I need to live with it as it is, and, I
really have no interest in ever stepping into it in a debug session.

So, the questions are:

- Given that I'll never want to debug the Oracle functions, is there a way
that I can tell GDB to ignore them in a way that would solve my problem?
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Vadim Ogranovich | 30 Apr 2002 21:11

GDB wipes out stack upon exception

Hi,

I want to the debugger to stop when an exception is thrown in the code
below, however it wipes out the stack of foo(). This behavior has something
to do with the argument of foo() being 'const std::vector<double> &' as GDB
behaves correctly if the argument is a built-in type.

// file foo.cpp
// compile with
// g++ -g -pedantic -Wall foo.cpp -o foo
#include <exception>
#include <vector>

void foo(const std::vector<double> & xA)
//void foo(const double & xA)
{
  throw std::exception();
}

int main() {
  std::vector<double> A;
  // double A;
  foo(A);
}

Here is a transcript of a GDB session, note that foo() is not on the stack
as I'd have expected:

(gdb) R
The program being debugged has been started already.
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Gmane