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Date: Fri, 10 Jul 2009 15:16:00 -0000
Subject: [Bug debug/40713]  New: Overlapping .debug_ranges (C++)
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From: "jan dot kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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class C { 
  C();
  void f() {};
};
C::C() { f(); };

g++ -c -o cu-overlap.o cu-overlap.C -g -O0
readelf --debug-dump=Ranges cu-overlap.o

Contents of the .debug_ranges section:
    Offset   Begin            End
    00000000 0000000000000000 0000000000000034
    00000000 0000000000000000 000000000000000a
    00000000 0000000000000000 000000000000001a
    00000000 000000000000001a 0000000000000034
    00000000 <End of list>

Relocation section '.rela.debug_ranges' at offset 0x1560 contains 8 entries:
    Offset             Type      Symbol's Value  Symbol's Name + Addend 
0000000000000000  R_X86_64_64   0000000000000000 .text + 0
0000000000000008  R_X86_64_64   0000000000000000 .text + 34
0000000000000010  R_X86_64_64   0000000000000000 .text._ZN1C1fEv + 0
0000000000000018  R_X86_64_64   0000000000000000 .text._ZN1C1fEv + a
0000000000000020  R_X86_64_64   0000000000000000 .text + 0
0000000000000028  R_X86_64_64   0000000000000000 .text + 1a
0000000000000030  R_X86_64_64   0000000000000000 .text + 1a
0000000000000038  R_X86_64_64   0000000000000000 .text + 34


DWARF3 2.17.3: Address range entries in a range list may not overlap.

Contents of the .debug_ranges section:
    Offset   Begin            End
1st 00000000 0000000000000000 0000000000000034 - is from .Ltext0 .. .Letext0
2nd 00000000 0000000000000000 000000000000000a - NOT overlapping, COMDAT C::f()
3rd 00000000 0000000000000000 000000000000001a - is from first C::C() instance
4th 00000000 000000000000001a 0000000000000034 - is from second C::C() instance

1st overlaps with 3rd+4th.


-- 
           Summary: Overlapping .debug_ranges (C++)
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jan dot kratochvil at redhat dot com
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40713