[Bug gdb/14377] [7.5 Regression] JIT debug is broken

["hjl.tools at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=14377

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> 2012-07-30 19:54:42 UTC ---
Created attachment 6562
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6562
GDB chokes on it

valgrind reports:

==23313== Invalid read of size 1
==23313==    at 0x639749: read_unsigned_leb128 (dwarf2read.c:13581)
==23313==    by 0x628A6A: peek_die_abbrev (dwarf2read.c:6070)
==23313==    by 0x628AFF: skip_children (dwarf2read.c:6098)
==23313==    by 0x628FBC: locate_pdi_sibling (dwarf2read.c:6248)
==23313==    by 0x6378D3: load_partial_dies (dwarf2read.c:12593)
==23313==    by 0x625CB0: process_psymtab_comp_unit_reader (dwarf2read.c:4800)
==23313==    by 0x62559E: init_cutu_and_read_dies (dwarf2read.c:4584)
==23313==    by 0x62617B: process_psymtab_comp_unit (dwarf2read.c:4882)
==23313==    by 0x6273CF: dwarf2_build_psymtabs_hard (dwarf2read.c:5377)
==23313==    by 0x6232C6: dwarf2_build_psymtabs (dwarf2read.c:3704)
==23313==    by 0x50F4E0: read_psyms (elfread.c:1467)
==23313==    by 0x594529: require_partial_symbols (psymtab.c:88)
==23313==  Address 0xcc467f3 is 0 bytes after a block of size 211 alloc'd
==23313==    at 0x4A0884D: malloc (vg_replace_malloc.c:263)
==23313==    by 0x6F8CEA: xmalloc (common-utils.c:50)
==23313==    by 0x5EF3A8: gdb_bfd_map_section (gdb_bfd.c:485)
==23313==    by 0x61EF3E: dwarf2_read_section (dwarf2read.c:1838)
==23313==    by 0x62731A: dwarf2_build_psymtabs_hard (dwarf2read.c:5356)
==23313==    by 0x6232C6: dwarf2_build_psymtabs (dwarf2read.c:3704)
==23313==    by 0x50F4E0: read_psyms (elfread.c:1467)
==23313==    by 0x594529: require_partial_symbols (psymtab.c:88)
==23313==    by 0x59A782: syms_from_objfile (symfile.c:1002)
==23313==    by 0x59A991: symbol_file_add_with_addrs_or_offsets
(symfile.c:1105)
==23313==    by 0x59AB8F: symbol_file_add_from_bfd (symfile.c:1195)
==23313==    by 0x6F3D58: jit_bfd_try_read_symtab (jit.c:901)

(top-gdb) p *orig_pdi
$20 = {offset = {sect_off = 60}, tag = DW_TAG_subprogram, has_children = 1, 
  is_external = 0, is_declaration = 0, has_type = 0, has_specification = 0, 
  has_pc_info = 1, may_be_inlined = 0, scope_set = 0, has_byte_size = 0, 
  has_template_arguments = 0, fixup_called = 0, is_dwz = 0, spec_is_dwz = 0, 
  name = 0x31d2fcd "native runtime.js", linkage_name = 0x0, scope = 0x0, d = {
    locdesc = 0x0, offset = {sect_off = 0}}, lowpc = 28346582892064, 
  highpc = 28346582892708, sibling = 0x0, spec_offset = {sect_off = 0}, 
  die_parent = 0x0, die_child = 0x0, die_sibling = 0x0}
(top-gdb)

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