Re: [Qemu-devel] [PATCH] win64: perform correct setjmp calls

[Stefan Weil <sw@weilnetz.de>]

Am 09.02.2015 um 09:07 schrieb Pavel Dovgaluk:
>> From: Stefan Weil [mailto:sw@weilnetz.de]
>> Am 09.02.2015 um 08:55 schrieb Pavel Dovgalyuk:
>>> On w64, setjmp is implemented by _setjmp which needs a second parameter.
>>> This parameter should be NULL to allow using longjump from generated code.
>>> This patch replaces all usages of setjmp.h with new header files which
>>> replaces setjmp with _setjmp function on win64 platform.
>>>
>>> Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
>> Please have a look at include/sysemu/os-win32.h. I think that your patch
>> is not needed because the current code already uses _setjmp.
> Right, but some of the files (e.g. include/qom/cpu.h) include setjmp.h directly.
> Then we have the following for compiling cpu-exec.c:
>
> cpu-exec.c:
> ...
> os-win32.h
> ...
> setjmp.h
> ...
>
> In this situation cpu-exec will call incorrect setjmp function.
>
> Pavel Dovgalyuk


It won't call the wrong setjmp function, at least not in my tests. 
cpu-exec.c gets the setjmp declaration from os-win32.h. Without it, QEMU 
would be unusable because it would crash very soon during the emulation.

Do you see problems caused by a wrong setjmp with latest QEMU? If yes: 
which build environment do you use (host, compiler, version of MinGW*)?