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From: Pedro Alves <pedro@codesourcery.com>
To: nobody@sources.redhat.com
Cc: gdb-prs@sources.redhat.com,
Subject: Re: macros/2564: 'p siginfo->si_addr' doesn't work anymore
Date: Wed, 10 Dec 2008 21:18:00 -0000 [thread overview]
Message-ID: <20081210211802.15740.qmail@sourceware.org> (raw)
The following reply was made to PR macros/2564; it has been noted by GNATS.
From: Pedro Alves <pedro@codesourcery.com>
To: Tom Tromey <tromey@redhat.com>
Cc: gdb-gnats@sources.redhat.com,
nobody@sources.redhat.com,
gdb-prs@sources.redhat.com
Subject: Re: macros/2564: 'p siginfo->si_addr' doesn't work anymore
Date: Wed, 10 Dec 2008 21:13:57 +0000
Hmmm, weird. I'm trying on pristine sources from today.
(gdb) set debug expression 1
(gdb) p siginfo.si_addr
Dump of expression @ 0xdd0520'
Language c, 19 elements, 16 bytes each.
Index Opcode Hex Value String Value
0 OP_VAR_VALUE 44 ,...............
1 OP_NULL 0 ................
2 <unknown 12531280> 12531280 P6..............
3 OP_VAR_VALUE 44 ,...............
4 STRUCTOP_STRUCT 87 W...............
5 BINOP_LOGICAL_AND 9 ................
6 <unknown 1718186847> 7236270204641702751 _sifields.......
7 BINOP_LOGICAL_AND 9 ................
8 STRUCTOP_STRUCT 87 W...............
9 STRUCTOP_STRUCT 87 W...............
10 BINOP_LOGICAL_AND 9 ................
11 <unknown 1734964063> 7815259820820886367 _sigfault.......
12 BINOP_LOGICAL_AND 9 ................
13 STRUCTOP_STRUCT 87 W...............
14 STRUCTOP_STRUCT 87 W...............
15 BINOP_LSH 7 ................
16 OP_NULL 25263822268792832 ....P.Y.........
17 BINOP_LSH 7 ................
18 STRUCTOP_STRUCT 87 W...............
Dump of expression @ 0xdd0520, after conversion to prefix form:
Expression: `siginfo._sifields._sigfault.'
Language c, 19 elements, 16 bytes each.
0 STRUCTOP_STRUCT Element name: `'
5 STRUCTOP_STRUCT Element name: `_sigfault'
10 STRUCTOP_STRUCT Element name: `_sifields'
15 OP_VAR_VALUE Block @0x0, symbol @0xbf3650 (siginfo)
There is no member named .
(gdb)
Hmmm, I just noticed that if I try enough times, it sometimes
succeeds, which brings us to Valgrind:
(gdb) p siginfo_p->si_addr
==18963==
==18963== Invalid read of size 1
==18963== at 0x4C250A8: memcpy (mc_replace_strmem.c:402)
==18963== by 0x546B36: write_exp_string (parse.c:349)
==18963== by 0x5E2F94: c_parse_internal (c-exp.y:338)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963== by 0x49DA8B: do_cfunc (cli-decode.c:63)
==18963== by 0x4A06F6: cmd_func (cli-decode.c:1700)
==18963== Address 0x7c583f2 is 26 bytes inside a block of size 36 free'd
==18963== at 0x4C22B2E: free (vg_replace_malloc.c:323)
==18963== by 0x45BC31: xfree (utils.c:1151)
==18963== by 0x595098: finished_macro_expansion (c-lang.c:246)
==18963== by 0x5E5379: c_lex (c-exp.y:1475)
==18963== by 0x5E2B2A: c_parse_internal (c-exp.c.tmp:1785)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963==
==18963== Invalid read of size 1
==18963== at 0x4C250B1: memcpy (mc_replace_strmem.c:402)
==18963== by 0x546B36: write_exp_string (parse.c:349)
==18963== by 0x5E2F94: c_parse_internal (c-exp.y:338)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963== by 0x49DA8B: do_cfunc (cli-decode.c:63)
==18963== by 0x4A06F6: cmd_func (cli-decode.c:1700)
==18963== Address 0x7c583f1 is 25 bytes inside a block of size 36 free'd
==18963== at 0x4C22B2E: free (vg_replace_malloc.c:323)
==18963== by 0x45BC31: xfree (utils.c:1151)
==18963== by 0x595098: finished_macro_expansion (c-lang.c:246)
==18963== by 0x5E5379: c_lex (c-exp.y:1475)
==18963== by 0x5E2B2A: c_parse_internal (c-exp.c.tmp:1785)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963==
==18963== Invalid read of size 1
==18963== at 0x4C250B8: memcpy (mc_replace_strmem.c:402)
==18963== by 0x546B36: write_exp_string (parse.c:349)
==18963== by 0x5E2F94: c_parse_internal (c-exp.y:338)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963== by 0x49DA8B: do_cfunc (cli-decode.c:63)
==18963== by 0x4A06F6: cmd_func (cli-decode.c:1700)
==18963== Address 0x7c583f0 is 24 bytes inside a block of size 36 free'd
==18963== at 0x4C22B2E: free (vg_replace_malloc.c:323)
==18963== by 0x45BC31: xfree (utils.c:1151)
==18963== by 0x595098: finished_macro_expansion (c-lang.c:246)
==18963== by 0x5E5379: c_lex (c-exp.y:1475)
==18963== by 0x5E2B2A: c_parse_internal (c-exp.c.tmp:1785)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963==
==18963== Invalid read of size 1
==18963== at 0x4C250BF: memcpy (mc_replace_strmem.c:402)
==18963== by 0x546B36: write_exp_string (parse.c:349)
==18963== by 0x5E2F94: c_parse_internal (c-exp.y:338)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963== by 0x49DA8B: do_cfunc (cli-decode.c:63)
==18963== by 0x4A06F6: cmd_func (cli-decode.c:1700)
==18963== Address 0x7c583ef is 23 bytes inside a block of size 36 free'd
==18963== at 0x4C22B2E: free (vg_replace_malloc.c:323)
==18963== by 0x45BC31: xfree (utils.c:1151)
==18963== by 0x595098: finished_macro_expansion (c-lang.c:246)
==18963== by 0x5E5379: c_lex (c-exp.y:1475)
==18963== by 0x5E2B2A: c_parse_internal (c-exp.c.tmp:1785)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963==
==18963== Invalid read of size 1
==18963== at 0x4C250E0: memcpy (mc_replace_strmem.c:402)
==18963== by 0x546B36: write_exp_string (parse.c:349)
==18963== by 0x5E2F94: c_parse_internal (c-exp.y:338)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963== by 0x49DA8B: do_cfunc (cli-decode.c:63)
==18963== by 0x4A06F6: cmd_func (cli-decode.c:1700)
==18963== Address 0x7c583ee is 22 bytes inside a block of size 36 free'd
==18963== at 0x4C22B2E: free (vg_replace_malloc.c:323)
==18963== by 0x45BC31: xfree (utils.c:1151)
==18963== by 0x595098: finished_macro_expansion (c-lang.c:246)
==18963== by 0x5E5379: c_lex (c-exp.y:1475)
==18963== by 0x5E2B2A: c_parse_internal (c-exp.c.tmp:1785)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963==
==18963== Invalid read of size 1
==18963== at 0x4C250F0: memcpy (mc_replace_strmem.c:402)
==18963== by 0x546B36: write_exp_string (parse.c:349)
==18963== by 0x5E2F94: c_parse_internal (c-exp.y:338)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
==18963== by 0x49DA8B: do_cfunc (cli-decode.c:63)
==18963== by 0x4A06F6: cmd_func (cli-decode.c:1700)
==18963== Address 0x7c583ec is 20 bytes inside a block of size 36 free'd
==18963== at 0x4C22B2E: free (vg_replace_malloc.c:323)
==18963== by 0x45BC31: xfree (utils.c:1151)
==18963== by 0x595098: finished_macro_expansion (c-lang.c:246)
==18963== by 0x5E5379: c_lex (c-exp.y:1475)
==18963== by 0x5E2B2A: c_parse_internal (c-exp.c.tmp:1785)
==18963== by 0x5E62FD: c_parse (c-exp.y:1908)
==18963== by 0x5951C4: c_preprocess_and_parse (c-lang.c:286)
==18963== by 0x547B4B: parse_exp_in_context (parse.c:1034)
==18963== by 0x547993: parse_exp_1 (parse.c:972)
==18963== by 0x547C82: parse_expression (parse.c:1084)
==18963== by 0x4EFE36: print_command_1 (printcmd.c:871)
==18963== by 0x4EFFCB: print_command (printcmd.c:921)
$1 = (void *) 0x1
(gdb)
--
Pedro Alves
next reply other threads:[~2008-12-10 21:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-10 21:18 Pedro Alves [this message]
-- strict thread matches above, loose matches on Subject: below --
2008-12-11 18:31 tromey
2008-12-11 1:14 tromey
2008-12-10 19:28 Tom Tromey
2008-12-10 16:58 Pedro Alves
2008-12-10 15:48 pedro
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