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bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files'
From: |
Noam Postavsky |
Subject: |
bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files' |
Date: |
Mon, 12 Mar 2018 21:59:57 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux) |
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Noam Postavsky <npostavs@gmail.com>
>> Cc: michael_heerdegen@web.de, john.b.mastro@gmail.com, nicolas@petton.fr,
>> 30626@debbugs.gnu.org
>> Date: Sun, 11 Mar 2018 17:51:19 -0400
>>
>> > If you have the address, you could first find the stack frame to which
>> > it belongs, right?
>>
>> Um, how do I do that part?
>
> By comparing the address with the value of $bp in each frame, I'd say.
Hmm, I found a match, but it doesn't make any sense.
#4851 0x0000000000611d4f in mark_vectorlike (ptr=0x2e64c90) at
../../src/alloc.c:6227
#4852 0x0000000000612b42 in mark_object (arg=XIL(0x2e64c95)) at
../../src/alloc.c:6624
#4853 0x000000000060f3ce in mark_maybe_pointer (p=0x2e64c90) at
../../src/alloc.c:4936
#4854 0x000000000060f452 in mark_memory (start=0x7fffffffa520,
end=0x7fffffffe868)
at ../../src/alloc.c:4985
#4855 0x000000000060f493 in mark_stack (bottom=0x7fffffffe868
"a\036h\364\377\177",
end=0x7fffffffa520 "0\245\377\377\377\177") at ../../src/alloc.c:5193
(gdb) frame 4854
#4854 0x000000000060f452 in mark_memory (start=0x7fffffffa520,
end=0x7fffffffe868)
at ../../src/alloc.c:4985
4985 mark_maybe_pointer (*(void **) pp);
(gdb) p pp
$28 = 0x7fffffffa968 "\220L\346\002"
(gdb) frame 4864
#4864 0x000000000068d950 in exec_byte_code (bytestr=XIL(0x2e7aad4),
vector=XIL(0x2e72715),
maxdepth=make_number(18), args_template=make_number(768), nargs=3,
args=0x7fffffffad20)
at ../../src/bytecode.c:632
632 TOP = Ffuncall (op + 1, &TOP);
(gdb) p $rbp
$29 = (void *) 0x7fffffffabd0
(gdb) p/x $rbp - $28
$32 = 0x268
(gdb) disas /s
[...]
1180 CASE (Bbuffer_substring):
1181 {
1182 Lisp_Object v1 = POP;
0x000000000068fea4 <+13154>: mov -0x40(%rbp),%rax
0x000000000068fea8 <+13158>: lea -0x8(%rax),%rdx
0x000000000068feac <+13162>: mov %rdx,-0x40(%rbp)
0x000000000068feb0 <+13166>: mov (%rax),%rax
0x000000000068feb3 <+13169>: mov %rax,-0x268(%rbp)
1183 TOP = Fbuffer_substring (TOP, v1);
0x000000000068feba <+13176>: mov -0x268(%rbp),%rdx
0x000000000068fec1 <+13183>: mov -0x40(%rbp),%rax
0x000000000068fec5 <+13187>: mov %rdx,%rsi
0x000000000068fec8 <+13190>: mov (%rax),%rdi
0x000000000068fecb <+13193>: callq 0x627e0a <Fbuffer_substring>
It can't be a buffer-substring arg, but that's the only reference to
-0x268(%rbp) in that function.
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', (continued)
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', John Mastro, 2018/03/02
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Noam Postavsky, 2018/03/03
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Noam Postavsky, 2018/03/04
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Eli Zaretskii, 2018/03/04
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Noam Postavsky, 2018/03/11
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Eli Zaretskii, 2018/03/11
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Noam Postavsky, 2018/03/11
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Eli Zaretskii, 2018/03/11
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files',
Noam Postavsky <=
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Eli Zaretskii, 2018/03/13
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Noam Postavsky, 2018/03/13
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Eli Zaretskii, 2018/03/15
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Noam Postavsky, 2018/03/17
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Eli Zaretskii, 2018/03/17
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Eli Zaretskii, 2018/03/17
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Noam Postavsky, 2018/03/17
- bug#30626: 26.0.91; Crash when traversing a `stream-of-directory-files', Eli Zaretskii, 2018/03/19