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Subject: Re: run.exe fails to start XWin on Windows 8.1 through the shortcut
To: Jaakov Jaakov <j_k_v AT ro DOT ru>, cygwin AT cygwin DOT com
References: <1439383412 DOT 552964 DOT 1315 DOT 31567 AT mail DOT rambler DOT ru>
From: Jon TURNEY <jon DOT turney AT dronecode DOT org DOT uk>
Cc: Stromeko AT nexgo DOT de
Message-ID: <55CB5887.2050607@dronecode.org.uk>
Date: Wed, 12 Aug 2015 15:30:31 +0100
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On 12/08/2015 13:43, Jaakov Jaakov wrote:
>
> XWin fails to start again (previously reported half a year ago or so).

Thanks for following up on this.

> The command issued by a shortcut is
> C:\cygwin64\bin\run.exe --quote /usr/bin/bash.exe -l -c "cd;
> /usr/bin/startxwin"
> Upon starting the shortcut, there is some disc acitivty, but no window
> opens, and no XWin processes show up (according to the later-called Task
> Manager).
> No files in the directory /var/log/xwin are updated.
> The file C:\cygwin64\run.exe.stackdump is generated, containing
> Stack trace:
[...]

mumble mumble abracadabra!

> 0x000000018007256a    signal_exit                                                     exceptions.cc:1358
> 0x0000000180073d33    _cygtls::call_signal_handler()                                  exceptions.cc:1828
> 0x000000018012dfef    sig_send(_pinfo*, siginfo_t&, _cygtls*)                         sigproc.cc:714
> 0x000000018012ad90    _pinfo::kill(siginfo_t&)                                        signal.cc:252
> 0x000000018012b259    kill0                                                           signal.cc:303
> 0x000000018012b42c    raise                                                           signal.cc:289
> 0x000000018012b6ef    abort                                                           signal.cc:376
> 0x00000001801612da    dlfree                                                          malloc.cc:4717
> 0x00000001800cd933    free                                                            sync.h:36
> 0x0000000180126d5b    ??                                                              sigfe.s:43
> 0x00000001004011cc    file_exists_multi                                               run.c:877
> 0x0000000100404da8    main                                                            run.c:300
> 0x0000000180048410    dll_crt0_1(void*)                                               dcrt0.cc:1047
> 0x00000001800460dc    _cygtls::call2(unsigned int (*)(void*, void*), void*, void*)    cygtls.cc:112
> 0x0000000180046174    _cygtls::call(unsigned int (*)(void*, void*), void*)            cygtls.cc:30
> 0x00000001004036d1    cygwin_crt0                                                     cygwin_crt0.c:22

Achim,

Not sure if this is the cause of this problem, but after a bit of 
staring at file_exists_multi(), I notice that run2_fileExits() doesn't 
initialize t when it returns FALSE, so perhaps the following is a good idea?

> diff --git a/src/run.c b/src/run.c
> index e88441b..0985571 100644
> --- a/src/run.c
> +++ b/src/run.c
> @@ -880,7 +880,7 @@ file_exists_multi(char* fullname, const char* path,
>      fullname[0] = '\0';
>      for (i = 0; i < extcnt; i++)
>      {
> -        char* t;
> +        char* t = NULL;
>          strcpy(tryName,name_noext);
>          strcat(tryName,exts[i]);
>          if ((run2_fileExists(&t, path, tryName) == TRUE) && t && *t)


-- 
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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