[Bug gold/12640] New: Gold accesses vector out of range

[ppluzhnikov at google dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12640

           Summary: Gold accesses vector out of range
           Product: binutils
           Version: 2.22 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gold
        AssignedTo: address@hidden
        ReportedBy: address@hidden


If current HEAD is built with -D_GLIBCXX_DEBUG, then debug_msg test case fails
with:

    error: attempt to subscript container with out-of-bounds index 0, but     
    container only holds 0 elements.

Objects involved in the operation:
sequence "this" @ 0x0x7fffffff68d8 {
  type = NSt7__debug6vectorIhSaIhEEE;
}

This is happening here:


#0  0x00007ffff70b89f5 in raise (sig=<value optimized out>)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00007ffff70bc413 in abort () at abort.c:92
#2  0x00007ffff790a70d in __gnu_debug::_Error_formatter::_M_error() const ()
   from /usr/lib64/libstdc++.so.6
#3  0x00000000006cd5ac in std::__debug::vector<unsigned char,
std::allocator<unsigned char> >::operator[] (this=0x7fffffff68d8, __n=0)
    at
../lib/gcc/x86_64-unknown-linux-gnu/4.4.3/../../../../include/c++/4.4.3/debug/vector:265
#4  0x00000000007d070f in gold::Sized_dwarf_line_info<64,
false>::read_header_prolog (this=0x7fffffff68a0, lineptr=0x7ffff7ff8315 "")
    at ../../src/gold/dwarf_reader.cc:192
#5  0x00000000007d0188 in gold::Sized_dwarf_line_info<64,
false>::read_line_mappings (this=0x7fffffff68a0, object=0xaa5f40, 
    shndx=4294967295) at ../../src/gold/dwarf_reader.cc:576
#6  0x00000000007caf24 in gold::Sized_dwarf_line_info<64,
false>::Sized_dwarf_line_info (this=0x7fffffff68a0, object=0xaa5f40, 
    read_shndx=4294967295) at ../../src/gold/dwarf_reader.cc:139
#7  0x00000000005e7f3b in gold::Relocate_info<64, false>::location (
    this=0x7fffffff6df0, offset=37) at ../../src/gold/object.cc:2608
#8  0x000000000056f2fc in gold::gold_undefined_symbol_at_location<64, false>
(sym=0xaaa9b0, relinfo=0x7fffffff6df0, relnum=2, reloffset=37)
    at ../../src/gold/errors.cc:296
#9  0x000000000044e29a in gold::relocate_section<64, false,
<unnamed>::Target_x86_64, 4, <unnamed>::Target_x86_64::Relocate>(const
gold::Relocate_info<64, false> *, (anonymous namespace)::Target_x86_64 *, const
unsigned char *, size_t, gold::Output_section *, bool, unsigned char *,
uint64_t, gold::section_size_type, const gold::Reloc_symbol_changes *)
(relinfo=0x7fffffff6df0, target=0xaa5e50, 
    prelocs=0x7ffff7ff8ae0 "%", reloc_count=8, 
    output_section=0xaa70b0, needs_special_offset_handling=false, 
    view=0x7ffff6294460 "1\355\350(", view_address=4195424, 
    view_size=132, reloc_symbol_changes=0x0)
    at ../../src/gold/target-reloc.h:354
#10 0x000000000044bde5 in (anonymous
namespace)::Target_x86_64::relocate_section (this=0xaa5e50,
relinfo=0x7fffffff6df0, sh_type=4, 
    prelocs=0x7ffff7ff8ab0 "\027", reloc_count=8, 
    output_section=0xaa70b0, needs_special_offset_handling=false, 
    view=0x7ffff6294460 "1\355\350(", address=4195424, 
    view_size=132, reloc_symbol_changes=0x0)
    at ../../src/gold/x86_64.cc:3014
#11 0x00000000006d5988 in gold::Sized_relobj<64, false>::do_relocate_sections
(this=0xaa5f40, symtab=0x7fffffffc720, 
    layout=0x7fffffffc220, pshdrs=0x7ffff7ff8530 "", of=0xaa9b00, 
    pviews=0x7fffffff6f80) at ../../src/gold/reloc.cc:993
#12 0x00000000005de4da in gold::Sized_relobj<64, false>::relocate_sections
(this=0xaa5f40, symtab=0x7fffffffc720, layout=0x7fffffffc220, 
    pshdrs=0x7ffff7ff8530 "", of=0xaa9b00, pviews=0x7fffffff6f80)
    at ../../src/gold/object.h:2086
#13 0x00000000006d3ea4 in gold::Sized_relobj<64, false>::do_relocate
    (this=0xaa5f40, symtab=0x7fffffffc720, layout=0x7fffffffc220, 
    of=0xaa9b00) at ../../src/gold/reloc.cc:661
#14 0x00000000006cf654 in gold::Relobj::relocate (this=0xaa5f40, 
    symtab=0x7fffffffc720, layout=0x7fffffffc220, of=0xaa9b00)
    at ../../src/gold/object.h:833
#15 0x00000000006cf2ac in gold::Relocate_task::run (this=0xca21a0)
    at ../../src/gold/reloc.cc:233
#16 0x00000000007abe49 in gold::Workqueue::find_and_run_task (
    this=0x7fffffffcdb0, thread_number=0)
    at ../../src/gold/workqueue.cc:319
#17 0x00000000007ac492 in gold::Workqueue::process (
    this=0x7fffffffcdb0, thread_number=0)
    at ../../src/gold/workqueue.cc:495
#18 0x0000000000406382 in main (argc=37, argv=0x7fffffffcfe8)
    at ../../src/gold/main.cc:247

(gdb) fr 4
#4  0x00000000007d070f in gold::Sized_dwarf_line_info<64,
false>::read_header_prolog (this=0x7fffffff68a0, lineptr=0x7ffff7ff8315 "")
    at ../../src/gold/dwarf_reader.cc:192
192       header_.std_opcode_lengths[0] = 0;
(gdb) p header_.std_opcode_lengths
$1 = std::__debug::vector of length 0, capacity 14
(gdb)

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