dtrace discuss - Jun 2007 - compile c code inserted DTrace probes failed on sol10

Hi,

I''m compiling a "src.c" code inserted with DTrace probes as
bellow:

#include <myapp_dtrace.h>

wait_for_lock()
{
    DTRACE_START();
     .....
     DTRACE_DONE();
}
 
dtrace -G -32 -s myapp_dtrace.d src.o
CC -o test myapp_dtrace.o src1.o src.o

I got the error as:

Undefined                       first referenced
 symbol                             in file
wait_for_lock                  myapp_dtrace.o

But the compilation and the probes worked fine on the Solaris Nevada snv_42a.
Here is the code dump on solaris 10 11/06 vs. Solaris Nevada:

Sol 10:
elfdump -s src.o |grep wait_for_lock
     [5]  0x00000110 0x00000203 FUNC LOCL D 0 .txt       wait_for_lock

elfdump -s mysql_dtrace.o |grep wait_for_lock
     [53]  0x00000000 0x00000000 NOTY GLOB D 0 UNDEF       wait_for_lock

Solaris Nevada:
elfdump -s src.o |grep wait_for_lock
     [10]  0x000001cc 0x00000304 FUNC LOCL D 0 .txt       wait_for_lock
     [60]  0x000001cc 0x00000304 FUNC GLOB H 0 .txt      
$dtrace34031.wait_for_lock

Is there any comment/suggestion on the difference of the code dump causing the
compilation error on Solaris 10?


Thanks,
Jenny





   Jenny Chen              
   Software Engineer                 
   Market Development Engineering      
   v-mail:(650) 786-4477                                  
   SUN Microsystems

See this bug:

  6370454 dtrace should support USDT probes in static functions

Prior to its integration, DTrace probes could not be inserted in static
functions. This will be part of S10U4. You can work around the issue by
runnind ''dtrace -G'' on a SNV machine or by making the function
non-static
(and you can scope it local later with the help of mapfile if that''s
important for the given application).

Adam

On Fri, Jun 22, 2007 at 12:13:14PM -0700, Luojia Chen
wrote:
> Hi,
> 
> I''m compiling a "src.c" code inserted with DTrace probes
as bellow:
> 
> #include <myapp_dtrace.h>
> 
> wait_for_lock()
> {
>     DTRACE_START();
>      .....
>      DTRACE_DONE();
> }
>  
> dtrace -G -32 -s myapp_dtrace.d src.o
> CC -o test myapp_dtrace.o src1.o src.o
> 
> I got the error as:
> 
> Undefined                       first referenced
>  symbol                             in file
> wait_for_lock                  myapp_dtrace.o
> 
> But the compilation and the probes worked fine on the Solaris Nevada
snv_42a. Here is the code dump on solaris 10 11/06 vs. Solaris Nevada:
> 
> Sol 10:
> elfdump -s src.o |grep wait_for_lock
>      [5]  0x00000110 0x00000203 FUNC LOCL D 0 .txt       wait_for_lock
> 
> elfdump -s mysql_dtrace.o |grep wait_for_lock
>      [53]  0x00000000 0x00000000 NOTY GLOB D 0 UNDEF       wait_for_lock
> 
> Solaris Nevada:
> elfdump -s src.o |grep wait_for_lock
>      [10]  0x000001cc 0x00000304 FUNC LOCL D 0 .txt       wait_for_lock
>      [60]  0x000001cc 0x00000304 FUNC GLOB H 0 .txt      
$dtrace34031.wait_for_lock
> 
> Is there any comment/suggestion on the difference of the code dump causing
the compilation error on Solaris 10?
> 
> 
> Thanks,
> Jenny
> 
> 
> 
> 
> 
>    Jenny Chen              
>    Software Engineer                 
>    Market Development Engineering      
>    v-mail:(650) 786-4477                                  
>    SUN Microsystems
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
-- 
Adam Leventhal, Solaris Kernel Development       http://blogs.sun.com/ahl