[Bug debug/47292] New: Violation of DWARF-3 spec for DW_FORM_strp

[pett at ca dot ibm.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47292

           Summary: Violation of DWARF-3 spec for DW_FORM_strp
           Product: gcc
           Version: 4.4.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: pett@ca.ibm.com


This version of the compiler marks its debug information as dwarf-3.  This
causes problems with a dwarf-3 compliant debugger when debugging 64 bit code.

In section "7.4 32-Bit and 64-Bit DWARF Formats", the dwarf-3 spec says with
regard to DW_FORM_strp:
"Within the body of the .debug_info section, certain forms of attribute value
depend on the choice of DWARF format as follows. For the 32-bit DWARF format,
the value is a 32-bit unsigned integer; for the 64-bit DWARF format, the value
is a 64-bit unsigned integer."

This version of the compiler is generating 32 bit integers for both 32 and 64
bit formats.  This causes a compliant debugger to generate an incorrect pointer
into the debug information.

gcc -v reports:
Using built-in specs.
Target: ppc64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --enable-secureplt --with-long-double-128
--with-cpu-32=power4 --with-tune-32=power6 --with-cpu-64=power4
--with-tune-64=power6 --build=ppc64-redhat-linux
Thread model: posix
gcc version 4.4.4 20100726 (Red Hat 4.4.4-13) (GCC)