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Date: Wed, 10 Jun 2015 21:43:13 +0300
From: Shinnok <>
Subject: Re: Jumbo & Johnny Windows Problem (was Windows event loop)

> On Jun 10, 2015, at 7:03 PM, Mathieu Laprise <> wrote:
> On Wed, Jun 10, 2015 at 8:28 AM, Mathieu Laprise < <>> wrote:
> On Wed, Jun 10, 2015 at 8:26 AM, Mathieu Laprise < <>> wrote:
> I'm talking about latest bleeding-jumbo from github build with cygwin. Also, the recent windows build from Rich on the wiki does the same. Magnum did update to the relevant core version 10 days ago , see commit <> . I'll try to get a crash dump today
> EDIT : The cvsimport is this commit <>
> I used "make debug" on cygwin for jumbo. I used johnny to start john, attached the process to 1) Visual Studio and 2) The windows task manager. After that, I pushed the pause button which does in Johnny : FreeConsole(); AttachConsole(processId()); GenerateConsoleCtrlEvent(CTRL_C_EVENT,0); FreeConsole();
> I usually get a .pdb file when I build stuff with visual studio for symbols which is supposed to help with the crash dump but I don't see it with cygwin, I don't know if it's normal. I got 2 .dmp file that are 235 Mo each. I have already tried to analyze crash dump from my Windows 8 apps in the past and I never had success, I don't really understand that stuff and I don't know if this dump is in a usable state. I attached a link from my google drive to the VS crash dump.​
>  johnVS.dmp <>​

Hey Mathieu,

Thanks for digging further. The dmp on GDrive requires permissions somehow. Still not sure how useful is that dmp.
A better approach would be to attach to the spawned JtR with the gdb in cygwin and then make it crash. GDB should pause and offer a stack trace. Then you can follow with the usual GDB commands such as:
* bt all
* info locals
* info threads
* info registers <>

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