[Bug c++/11134] DWARF-2/3 Problems with const int globals

drkent at lanl dot gov gcc-bugzilla@gcc.gnu.org
Wed Jun 18 14:57:00 GMT 2003


PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11134



------- Additional Comments From drkent at lanl dot gov  2003-06-18 14:57 -------
Subject: Re:  DWARF Problems with const int globals

I'm under too much of a time crunch to submit a very small test case.  I 
could only provide a large, unstable, difficult to install program which 
probably wouldn't be much help.

Chip


On Mon, Jun 09, 2003 at 02:38:13PM -0000, drow@mvista.com wrote:
> PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11134
> 
> 
> 
> ------- Additional Comments From drow@mvista.com  2003-06-09 14:38 -------
> Subject: Re:  DWARF Problems with const int globals
> 
> Oh, thanks.  I'm not familiar with that library's API... it's on this
> drive somewhere...
> 
> In that case, will the submitter please provide a testcase?  Does
> readelf show anything that looks wrong?  It might be a bug in
> libdwarf...
> 
> On Mon, Jun 09, 2003 at 02:29:02PM -0000, dberlin@dberlin.org wrote:
> > ------- Additional Comments From dberlin@dberlin.org  2003-06-09 14:29 -------
> > Subject: Re:  DWARF Problems with const int globals
> > 
> > He *must* be referring to DWARF2 already.
> > DW_DLV_NO_ENTRY is an error value returned by the libdwarf dwarf2 library
> > SGI wrote (and Intel rewrote, and Ulrich Drepper is writing for elfutils).
> > 
> > 
> > On Mon, 9 Jun 2003, drow@mvista.com wrote:
> > 
> > > PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
> > >
> > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11134
> > >
> > >
> > >
> > > ------- Additional Comments From drow@mvista.com  2003-06-09 14:21 -------
> > > Subject: Re:  New: DWARF Problems with const int globals
> > >
> > > This isn't really an answer to your bug report, but it counts as a
> > > workaround...
> > >
> > > On Mon, Jun 09, 2003 at 02:15:57PM -0000, drkent@lanl.gov wrote:
> > > > PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
> > > >
> > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11134
> > > >
> > > >            Summary: DWARF Problems with const int globals
> > > >            Product: gcc
> > > >            Version: 3.3
> > > >             Status: UNCONFIRMED
> > > >           Severity: normal
> > > >           Priority: P2
> > > >          Component: c++
> > > >         AssignedTo: unassigned@gcc.gnu.org
> > > >         ReportedBy: drkent@lanl.gov
> > > >                 CC: gcc-bugs@gcc.gnu.org
> > > >
> > > > I am developing a dynamic instrumentation tool that uses DWARF and have
> > > > encountered a few problems that could be from the dwarf information generated by
> > > > g++  3.3.
> > > >
> > > > There are a few global variables defined as "const int".  When the tool parses
> > > > the binary, it attempts to locate these variables and then gives a
> > > > DW_DLV_NO_ENTRY error which means that the attribute is not where the dwarf
> > > > information says it is.
> > > >
> > > > I have avoided these problems by changing the global const ints to #define
> > > > statments, and the code runs properly.
> > > >
> > > > Please contact me with any questions.
> > >
> > > If you are developing this tool, please, please, please use DWARF-2
> > > instead!  The DWARF writer is on its last legs, especially in C++, and
> > > the format is inferior.
> > >
> > 
> 
> 
> 
> 
> 
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-- 


-----------------------------------------------------
David R. "Chip" Kent IV

Parallel Tools Team
High Performance Computing Environments Group (CCN-8)
Los Alamos National Laboratory

(505)665-5021
drkent@lanl.gov
-----------------------------------------------------



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