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Fix dw2-icycle.exp -fsanitize=address GDB crash. 

binutils readelf -wi:
 <4><a2>: Abbrev Number: 26 (DW_TAG_inlined_subroutine)
    <a3>   DW_AT_abstract_origin: <0x5a>
    <a7>   DW_AT_low_pc      : 0x400590
    <ab>   DW_AT_high_pc     : 0x4
    <af>   DW_AT_call_file   : 1
    <b0>   DW_AT_call_line   : 20
    <b1>   DW_AT_sibling     : <0xb8>
 <2><b8>: Abbrev Number: 35 (DW_TAG_inlined_subroutine)
    <b9>   DW_AT_abstract_origin: <0x5a>
    <bd>   DW_AT_low_pc      : 0x400590
    <c1>   DW_AT_high_pc     : 0x4
    <c5>   DW_AT_call_file   : 1
    <c6>   DW_AT_call_line   : 29

<b1> DW_AT_sibling points to the next DIE - but that DIE is 2 levels
upwards - definitely not a sibling.  This confuses GDB up to a crash:

==32143== ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6024000198ac at pc 0xb4d104 bp 0x7fff63e96e70 sp
0x7fff63e96e60
READ of size 1 at 0x6024000198ac thread T0
    #0 0xb4d103 in read_unsigned_leb128 (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0xb4d103)
    #1 0xb15f3c in peek_die_abbrev (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0xb15f3c)
    #2 0xb46185 in load_partial_dies (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0xb46185)
    #3 0xb103fb in process_psymtab_comp_unit_reader (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0xb103fb)
    #4 0xb0d2a9 in init_cutu_and_read_dies (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0xb0d2a9)
    #5 0xb1115f in process_psymtab_comp_unit (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0xb1115f)
    #6 0xb1235f in dwarf2_build_psymtabs_hard (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0xb1235f)
    #7 0xb05536 in dwarf2_build_psymtabs (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0xb05536)
    #8 0x86d5a5 in read_psyms (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0x86d5a5)
    #9 0x9b1c37 in require_partial_symbols (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0x9b1c37)
    #10 0x9bf2d0 in read_symbols (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0x9bf2d0)
    #11 0x9c014c in syms_from_objfile_1 (/home/jkratoch/redhat/gdb-clean/gdb/gdb+0x9c014c)

gdb/testsuite/
2014-02-25  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Fix dw2-icycle.exp -fsanitize=address GDB crash.
	* gdb.dwarf2/dw2-icycle.S: Remove all DW_AT_sibling.

Message-ID: <20140224201011.GA28926@host2.jankratochvil.net>
This commit is contained in:
Jan Kratochvil 2014-02-25 18:28:38 +01:00
parent d6e9dd78c4
commit e2f0d509b3
2 changed files with 5 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2014-02-25 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix dw2-icycle.exp -fsanitize=address GDB crash.
* gdb.dwarf2/dw2-icycle.S: Remove all DW_AT_sibling.
2014-02-24 Doug Evans <dje@google.com>
* lib/gdb.exp (run_on_host): Log error output if program fails.

10
gdb/testsuite/gdb.dwarf2/dw2-icycle.S
View File

@ -63,21 +63,18 @@ p__top:
.uleb128 0x1 /* DW_AT_frame_base */
.byte 0x9c /* DW_OP_call_frame_cfa */
/* DW_AT_GNU_all_call_sites */
.4byte .S0x4fc - .Ldebug_info0 /* DW_AT_sibling */
.S0x1e0:
.uleb128 0x15 /* (DIE (0x1e0) DW_TAG_subprogram) */
.ascii "p__top__middle\0" /* DW_AT_name */
.byte 0x1 /* DW_AT_decl_file (p.adb) */
.byte 0x4 /* DW_AT_decl_line */
.byte 0x1 /* DW_AT_inline */
.4byte .S0x374 - .Ldebug_info0 /* DW_AT_sibling */
.S0x202:
.uleb128 0x15 /* (DIE (0x202) DW_TAG_subprogram) */
.ascii "p__top__middle__inside\0" /* DW_AT_name */
.byte 0x1 /* DW_AT_decl_file (p.adb) */
.byte 0x5 /* DW_AT_decl_line */
.byte 0x1 /* DW_AT_inline */
.4byte .S0x225 - .Ldebug_info0 /* DW_AT_sibling */
.byte 0 /* end of children of DIE 0x202 */
.S0x225:
.uleb128 0x18 /* (DIE (0x225) DW_TAG_subprogram) */
@ -95,7 +92,6 @@ p__top:
.4byte .LBE6-.LFB4 /* DW_AT_high_pc */
.byte 0x1 /* DW_AT_call_file (p.adb) */
.byte 0x14 /* DW_AT_call_line */
.4byte .S0x374 - .Ldebug_info0 /* DW_AT_sibling */
.byte 0 /* end of children of DIE 0x247 */
.byte 0 /* end of children of DIE 0x225 */
.byte 0 /* end of children of DIE 0x1e0 */
@ -167,8 +163,6 @@ p__top:
.uleb128 0x18 /* (DW_FORM_exprloc) */
.uleb128 0x2117 /* (DW_AT_GNU_all_call_sites) */
.uleb128 0x19 /* (DW_FORM_flag_present) */
.uleb128 0x1 /* (DW_AT_sibling) */
.uleb128 0x13 /* (DW_FORM_ref4) */
.byte 0
.byte 0
.uleb128 0x15 /* (abbrev code) */
@ -182,8 +176,6 @@ p__top:
.uleb128 0xb /* (DW_FORM_data1) */
.uleb128 0x20 /* (DW_AT_inline) */
.uleb128 0xb /* (DW_FORM_data1) */
.uleb128 0x1 /* (DW_AT_sibling) */
.uleb128 0x13 /* (DW_FORM_ref4) */
.byte 0
.byte 0
.uleb128 0x18 /* (abbrev code) */
@ -216,8 +208,6 @@ p__top:
.uleb128 0xb /* (DW_FORM_data1) */
.uleb128 0x59 /* (DW_AT_call_line) */
.uleb128 0xb /* (DW_FORM_data1) */
.uleb128 0x1 /* (DW_AT_sibling) */
.uleb128 0x13 /* (DW_FORM_ref4) */
.byte 0
.byte 0
.uleb128 0x23 /* (abbrev code) */