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Date: Fri, 24 May 2002 01:03:41 -0400
From: Christopher Faylor <cgf-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Problem attaching strace to a process
Message-ID: <20020524050341.GA10193@redhat.com>
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On Fri, May 24, 2002 at 05:32:22AM +0100, Conrad Scott wrote:
>I'm trying to use strace to attach to a running process (strace -p pid) but
>I'm not getting anywhere.
>
>To be precise, I get no output until the target process exits, when I get,
>for example, 'Attached to pid 2236 (windows pid 2156)', and no strace
>output.
>
>If I strace strace doing this, I get:
>
>$ strace strace -p 2156
>**********************************************
>Program name: C:\cygwin\bin\strace.exe (324)
>App version:  1003.10, api: 0.51
>DLL version:  1003.10, api: 0.51
>DLL build:    2002-02-25 11:14
>OS version:   Windows NT-5.0
>Date/Time:    2002-05-24 05:20:43
>**********************************************
>  542    7126 [unknown (0x90C)] strace 324 sig_send: pid 2156, signal -1,
>its_me 0
>  148    7274 [unknown (0x90C)] strace 324 getsem: pid 2156, ppid 1860, wait
>1000, initializing 0
>  233    7507 [unknown (0x90C)] strace 324 sig_send: Not waiting for
>sigcomplete.  its_me 0 signal -1
>   85    7592 [unknown (0x90C)] strace 324 sig_send: returning 0 from
>sending signal -1
>Attached to pid 2156 (windows pid 2420)
>
>The strace output appears as soon as I run the strace command; the 'Attached
>...' message appears once the target dies.
>
>Am I missing something? (presumably something obvious . . .) or are the
>gremlins having a party in my machine?
>
>Perplexed and seeking solace,

strace only works on cygwin processes.  strace itself is not a cygwin
process.  So, "strace strace" is a no-op.

cgf

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