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Message-ID: <546DDA57.2050901@shaddybaddah.name>
Date: Thu, 20 Nov 2014 23:11:03 +1100
From: Shaddy Baddah <lithium-cygwin AT shaddybaddah DOT name>
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To: cygwin AT cygwin DOT com
Subject: Re: addr2line not returning anything useful (maybe just for me?)
References: <546D8BA7 DOT 5090400 AT shaddybaddah DOT name> <20141120101949 DOT GM3810 AT calimero DOT vinschen DOT de>
In-Reply-To: <20141120101949.GM3810@calimero.vinschen.de>
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Hi,

On 20/11/14 21:19, Corinna Vinschen wrote:
> On Nov 20 17:35, Shaddy Baddah wrote:
>> Hi,
>>
>> I can't get addr2line to give me anything useful on any stackdump files.
>>
>> I haven't used it for a while, so perhaps the following snippet will
>> show my incorrect use?
>>
>> <snip>
>> $ cat > /tmp/foo.c << EOF
>>> int main() { ((void (*)(void))0)(); }
>>> EOF
>> $ gcc -g -o /tmp/foo2 /tmp/foo2.c
>> $ /tmp/foo2
>> Segmentation fault (core dumped)
>> $ addr2line -f -e /tmp/foo2.exe < foo2.exe.stackdump
>> ??
>> ??:0
>
> That doesn't work.  Did you inspect the stackdump file with an editor?
> Try something like
>
> $ awk '/^[0-9]/{print $2;}' foo2.exe.stackdump | addr2line -f -e /tmp/foo2.exe

Yep. That does the trick at least on x86. Unfortunately, I'm getting no
love on x86_64, but that's because the stackdump file actually contains
no frame lines at all:

Exception: STATUS_ACCESS_VIOLATION at rip=00000000000
rax=0000000000000000 rbx=000000000023AAF0 rcx=0000000000000001
rdx=0000000000000000 rsi=0000000600058EC0 rdi=000000000023AB32
r8 =00007FFAC1FE0000 r9 =00000000002325A0 r10=00007FFAC21152E0
r11=00000000002327F0 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=000000000023AB32
rbp=000000000023AAA0 rsp=000000000023AA78
program=c:\Users\Public\Temp\cygwin64\foo2.exe, pid 15200, thread main
cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B
Stack trace:
Frame        Function    Args
End of stack trace

It's not an urgent issue or anything, but I'd be grateful if someone
confirm it happens to them too, bonus for why.

-- 
Regards,
Shaddy

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