Thanx a lot! I figured out the part abt the optimization just a while
back and was abt 2 post it, too! There does seem to be some problem with
the floating point vars (even after setting fp ops in the thread
init)...
VC
PS: OOC, what does the warning abt the shared lib handler mean actually?
Stelian Pop wrote:
>
> On Tue, Jun 25, 2002 at 12:50:14PM -0500, V C Ravi wrote:
>
> > > $1 = 116 't'
> >
> > 1. What do the warning messages in gdb-5.1.90CVS-5 mean ?
>
> Here is my session:
> # /sbin/insmod hello.o
> Warning: loading hello.o will taint the kernel: no license
> # gdb hello.o
> GNU gdb Red Hat Linux (5.1.90CVS-5)
> Copyright 2002 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for details.
> This GDB was configured as "i386-redhat-linux"...
> (gdb) l
> 1 #include <rtl.h>
> 2 #include <time.h>
> 3 #include <pthread.h>
> 4 #include <rtl_debug.h>
> 5
> 6 pthread_t thread = NULL;
> 7
> 8 float gen_count = 0;
> 9 void * start_routine(void *arg) {
> 10
> (gdb) target remote /dev/rtf10
> Remote debugging using /dev/rtf10
> [New Thread -1035141120]
> [Switching to Thread -1035141120]
> start_routine (arg=0x1) at hello.c:23
> 23 pthread_wait_np ();
> warning: shared library handler failed to enable breakpoint
> (gdb) n
> 24 rtl_printf("Debug count = %d %c\n", (int)gen_count,
>option);
> (gdb) n
> 25 gen_count += 1.0;
> (gdb) info locals
> gen_var = 0
> gen_str = "test string\0\0\0\0\0\0\0\0"
> option = 116 't'
> (gdb) q
> The program is running. Exit anyway? (y or n) y
>
> As you see, there is only ONE warning printed, if you remember to do the 'list'
> command before the 'target remote' command.
>
> > 2. Why are all the symbols not read in completely in gdb-4.18-11 ?
>
> The symbols are read completly. What is happenning in your example is that the
> compiler is optimizing the source and since 'option' (for example) is not used
> later in your function the compiler is removing it completly. Just use normally
> the variables and they will show up in the debugger.
>
> Note however that the float variables seem to be more difficult to trace with
> the debugger. You need to use pthread_setfp_np() to enable floating poing
> operations in your thread anyway (you aren't doing it in your example), but even
> after that the debugger doesn't seem to access the value correctly...
>
> > 3. Why are all the symbols visible *when declared static* ?
>
> When declared static, the compiler cannot remove the variables, even if they
> are not used, since an external object file could reference them.
>
> > 4. What does the 116 in the output of "print option" stand for ?
>
> 't' is ASCII 116.
>
> Stelian.
> --
> Stelian Pop <[EMAIL PROTECTED]>
> Alcove - http://www.alcove.com
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