Mail Archives: cygwin/2011/05/20/13:44:28
On Fri, May 20, 2011 at 01:38:42PM -0400, Chris Sutcliffe wrote:
>On 20 May 2011 13:15, Christopher Faylor wrote:
>> On Fri, May 20, 2011 at 12:51:24PM -0400, Chris Sutcliffe wrote:
>>>On 20 May 2011 01:44, Christopher Faylor wrote:
>>>> On Thu, May 19, 2011 at 10:01:47PM -0400, Chris Sutcliffe wrote:
>>>>>Creating a debug build hasn't helped either. ?When it crashes it's
>>>>>causing a stack dump, so doing a 'bt' in gdb just returns 'no stack'.
>>>>
>>>> That probably means that it's forking. ?You're debugging the parent
>>>> when the child is having problems.
>>>>
>>>> The addresses in the stack dump can be decoded with gdb:
>>>>
>>>> l *0xnnnnn
>>>> ^
>>>> that's an "ell".
>>>
>>>I've tried l *0xnnnn for each of the addresses in the stack dump:
>>>
>>>Stack trace:
>>>Frame ? ? Function ?Args
>>>0028C77C ?76D51A2C ?(00000002, 7EFDE000, 00000000, 0000002F)
>>>0028C798 ?76D54238 ?(00000002, 0028C7F0, 00000000, 0000002F)
>>>0028C908 ?610BF0DD ?(0028CA1C, 0028C980, 0028C960, 0028C940)
>>>0028CA68 ?610BF7C0 ?(00000001, 020D9680, 020D96A0, 020D96C0)
>>>0028CAB8 ?610C3545 ?(020D79F8, 0000B5F5, 00000000, 020EC060)
>>>0028CD28 ?00405AA8 ?(61244184, 00000000, 0028CD68, 61007038)
>>>0028CD68 ?61007038 ?(00000000, 0028CDA4, 61006980, 7EFDE000)
>>>End of stack trace
>>>
>>>Each time I get:
>>>
>>>No source file for address 0xnnnnnn.
>>>
>>>I've tried both the Frame and Function addresses.
>>
>> Sounds like you don't have cygwin1.dbg (in the the cygwin src package if
>> you're using a release or downloadable if you're using a snapshot) and
>> either your program is stripped or it isn't built with debugging.
>> FWIW, 0x00405AA8 is likely the address of some location in rtorrent.
>
>No luck with 0x00405AA8, but it could be in libtorrent.dll, which I
>will also build with debugging info. I did manage to find the
>following (after loading the cygwin1.dbg symbols):
>
>0x61007038 is in dll_crt0_1(void*)
>(/ext/build/netrel/src/cygwin-1.7.9-1/winsup/cygwin/dcrt0.cc:974).
>969 /ext/build/netrel/src/cygwin-1.7.9-1/winsup/cygwin/dcrt0.cc:
>No such file or directory.
> in /ext/build/netrel/src/cygwin-1.7.9-1/winsup/cygwin/dcrt0.cc
>
>However my Cygwin source is in /usr as opposed to /ext/build/netrel,
>is there a way to tell gdb to look there instead?
Yes: "info gdb" or "help" in gdb will tell you how. In "info gdb" look
for "Source" and then "Source Path".
cgf
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