From: Ken Brown <kbrown@cornell.edu>
To: cygwin-patches@cygwin.com
Subject: Re: [PATCH] Cygwin: Set threadnames with SetThreadDescription()
Date: Mon, 30 May 2022 11:37:44 -0400 [thread overview]
Message-ID: <b0d41109-f306-f896-03bc-468e87982450@cornell.edu> (raw)
In-Reply-To: <20220529140315.18306-1-jon.turney@dronecode.org.uk>
On 5/29/2022 10:03 AM, Jon Turney wrote:
> gdb master recently learnt how to use GetThreadDescription() [1], so set
> threadnames using SetThreadDescription() [available since Windows
> 101607] as well.
>
> This is superior to using a special exception to indicate the thread
> name to the debugger, because the thread name isn't missed if you don't
> have a debugger attached at the time it's set.
>
> It's not clear what the encoding of a thread name string is, we assume
> UTF8 for the moment.
>
> For the moment, continue to use the old method as well, for the benefit
> of older gdb versions etc.
LGTM, except for a few missing spaces (see below), although maybe you did that
deliberately since the existing code was already like that.
> --- a/winsup/cygwin/miscfuncs.cc
> +++ b/winsup/cygwin/miscfuncs.cc
> @@ -18,6 +18,9 @@ details. */
> #include "tls_pbuf.h"
> #include "mmap_alloc.h"
>
> +/* not yet prototyped in w32api */
> +extern "C" HRESULT WINAPI SetThreadDescription(HANDLE hThread, PCWSTR lpThreadDescription);
^
> @@ -993,8 +996,8 @@ wmempcpy: \n\
>
> #define MS_VC_EXCEPTION 0x406D1388
>
> -void
> -SetThreadName(DWORD dwThreadID, const char* threadName)
^
> +static void
> +SetThreadNameExc(DWORD dwThreadID, const char* threadName)
^
> @@ -1025,6 +1028,32 @@ SetThreadName(DWORD dwThreadID, const char* threadName)
> __endtry
> }
>
> +void
> +SetThreadName(DWORD dwThreadID, const char* threadName)
^
[...]
> + SetThreadNameExc(dwThreadID, threadName);
^
Ken
next prev parent reply other threads:[~2022-05-30 15:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-29 14:03 Jon Turney
2022-05-30 15:37 ` Ken Brown [this message]
2022-06-01 17:48 ` Jon Turney
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