From: Ken Brown <kbrown@cornell.edu>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 17817@debbugs.gnu.org
Subject: bug#17817: 24.3.91; Assertion failure in bidi.c (Cygwin-w32 build)
Date: Fri, 20 Jun 2014 12:43:14 -0400 [thread overview]
Message-ID: <53A464A2.3080001@cornell.edu> (raw)
In-Reply-To: <53A44B18.3040202@cornell.edu>
On 6/20/2014 10:54 AM, Ken Brown wrote:
> On 6/20/2014 3:47 PM, Eli Zaretskii wrote:
>>> Date: Fri, 20 Jun 2014 15:40:28 +0100
>>> From: Ken Brown <kbrown@cornell.edu>
>>> CC: 17817@debbugs.gnu.org
>>>
>>> (gdb) p type + 0
>>> $2 = 1
>>> (gdb) p UNKNOWN_BT + 0
>>> $3 = 0
>>> (gdb) p NEUTRAL_ON + 0
>>> $4 = 23
>>>
>>> So, as you said, this is nonsense.
>>
>> Yeah. But still, the machine insists the value was bad. Hmmm...
>>
>> Can you show the disassembly of bidi_check_type?
>
> (gdb) disas bidi_check_type
> Dump of assembler code for function bidi_check_type:
> 0x004d2837 <+0>: push %ebp
> 0x004d2838 <+1>: mov %esp,%ebp
> 0x004d283a <+3>: sub $0x18,%esp
> 0x004d283d <+6>: movzbl 0x9063f8,%eax
> 0x004d2844 <+13>: xor $0x1,%eax
> 0x004d2847 <+16>: test %al,%al
> 0x004d2849 <+18>: je 0x4d286d <bidi_check_type+54>
> 0x004d284b <+20>: cmpl $0x17,0x8(%ebp)
> 0x004d284f <+24>: jbe 0x4d286d <bidi_check_type+54>
> 0x004d2851 <+26>: movl $0x149,0x8(%esp)
> 0x004d2859 <+34>: movl $0x86cc70,0x4(%esp)
> 0x004d2861 <+42>: movl $0x86ccbc,(%esp)
> 0x004d2868 <+49>: call 0x56e818 <die>
> 0x004d286d <+54>: leave
> 0x004d286e <+55>: ret
> End of assembler dump.
Sorry, that's from the 32-bit build. Here's the correct one:
(gdb) disas bidi_check_type
Dump of assembler code for function bidi_check_type:
0x00000001004fb4c3 <+0>: push %rbp
0x00000001004fb4c4 <+1>: mov %rsp,%rbp
0x00000001004fb4c7 <+4>: sub $0x20,%rsp
0x00000001004fb4cb <+8>: mov %ecx,0x10(%rbp)
0x00000001004fb4ce <+11>: mov 0x56402b(%rip),%rax #
0x100a5f500 <.refptr.suppress_checking>
0x00000001004fb4d5 <+18>: movzbl (%rax),%eax
0x00000001004fb4d8 <+21>: xor $0x1,%eax
0x00000001004fb4db <+24>: test %al,%al
0x00000001004fb4dd <+26>: je 0x1004fb4ff <bidi_check_type+60>
0x00000001004fb4df <+28>: cmpl $0x17,0x10(%rbp)
0x00000001004fb4e3 <+32>: jbe 0x1004fb4ff <bidi_check_type+60>
0x00000001004fb4e5 <+34>: mov $0x149,%r8d
0x00000001004fb4eb <+40>: lea 0x53303e(%rip),%rdx #
0x100a2e530 <DEFAULT_REHASH_SIZE+56>
0x00000001004fb4f2 <+47>: lea 0x53303f(%rip),%rcx #
0x100a2e538 <DEFAULT_REHASH_SIZE+64>
0x00000001004fb4f9 <+54>: callq 0x1005ba90b <die>
=> 0x00000001004fb4fe <+59>: nop
0x00000001004fb4ff <+60>: add $0x20,%rsp
0x00000001004fb503 <+64>: pop %rbp
0x00000001004fb504 <+65>: retq
End of assembler dump.
next prev parent reply other threads:[~2014-06-20 16:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-20 13:42 bug#17817: 24.3.91; Assertion failure in bidi.c (Cygwin-w32 build) Ken Brown
2014-06-20 14:21 ` Eli Zaretskii
2014-06-20 14:40 ` Ken Brown
2014-06-20 14:47 ` Eli Zaretskii
2014-06-20 14:54 ` Ken Brown
2014-06-20 16:43 ` Ken Brown [this message]
2014-06-20 18:29 ` Eli Zaretskii
2014-06-21 19:14 ` Ken Brown
2014-06-21 19:30 ` Eli Zaretskii
2014-06-21 19:36 ` Ken Brown
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