RE: ICorProfilerInfo::SetFunctionReJIT causes deadlock

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From: Jonathan Keljo [MS] (jkeljo_at_online.microsoft.com)
Date: 09/08/04 

Date: Wed, 08 Sep 2004 16:39:11 GMT

Most of what you mention--"dynamic languages, dynamically updateable
software, aspect-oriented programming"--I don't recommend implementing via
the profiling API. The profiling API is intended for diagnostic
purposes--"profiling," to use the term a bit loosely. Using it to implement
AOP or self-modifying code is an interesting experiment, but should not be
done for production code. For one thing, the requirement of having a
profiler in the process for the correct operation of the application will
make it impossible to attach a real performance or memory profiler when you
have perf issues, or to use other diagnostic tools that are
profiling-API-based. Eventually we hope to support AOP and such through
less kludgey means, but that's a ways off yet.

Jonathan

This posting is provided "AS IS" with no warranties, and confers no rights.

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| Thread-Topic: ICorProfilerInfo::SetFunctionReJIT causes deadlock
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| Subject: RE: ICorProfilerInfo::SetFunctionReJIT causes deadlock
| Date: Tue, 7 Sep 2004 19:41:05 -0700
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| Dear Jonathan,
|
| Thanks for your reply. I was able to kludge this to work using a
workaround
| similar to the one Patrick Grawehr used. I really hope MSFT gets this to
| work in 2.0. SetFunctionReJIT is extremely important for dynamic
languages,
| dynamically updateable software, aspect-oriented programming,
interception,
| you name it! Its an amazingly cool function!
|
| Cheers,
|
| \\Marc
|
| ""Jonathan Keljo [MS]"" wrote:
|
| > Sadly, no, we do not have a workaround for this. SetFunctionReJIT was
never
| > really implemented, but also was never made to return E_NOTIMPL. :-(
| >
| > We're hoping to implement SetFunctionReJIT in a future release, but
| > unfortunately it will not be in v2.0. (Though it will return E_NOTIMPL
| > rather than hanging your process.)
| >
| > Jonathan
| >
| > This posting is provided "AS IS" with no warranties, and confers no
rights.
| >
| > --------------------
| > | Thread-Topic: ICorProfilerInfo::SetFunctionReJIT causes deadlock
| > | thread-index: AcSTIQID9Of9PvEIQXqpx6m9OxqttA==
| > | X-WBNR-Posting-Host: 66.108.183.152
| > | From: "=?Utf-8?B?TWFyYyBFYWRkeQ==?=" <me133 [at] columbia [dot] edu
| > REMOVE_IF_NOT_SPAM>
| > | Subject: ICorProfilerInfo::SetFunctionReJIT causes deadlock
| > | Date: Sun, 5 Sep 2004 01:19:05 -0700
| > | Lines: 14
| > | Message-ID: <132B42E7-935A-401B-8E2D-9DF275E582C3@microsoft.com>
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| > | Xref: cpmsftngxa10.phx.gbl microsoft.public.dotnet.framework.clr:11787
| > | X-Tomcat-NG: microsoft.public.dotnet.framework.clr
| > |
| > | I've implemented a CLR Profiler using ICorProfilerCallback and the
| > Profiler
| > | API. I'm calling ICorProfilerInfo::SetFunctionReJIT() from a
separate
| > | thread. However, ICorProfilerCallback::JITCompilationStarted()
doesn't
| > get
| > | called. Instead, when the function that should be ReJIT'd is called,
the
| > | CLR Runtime hangs.
| > |
| > | You can find a great description of the problem from here:
| > |
| > |
| >
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=O6I4CoegDHA.1932%
| > |
| >
40TK2MSFTNGP11.phx.gbl&rnum=2&prev=/groups%3Fq%3DSetFunctionReJIT%26hl%3Den%
| >
26lr%3D%26ie%3DUTF-8%26selm%3DO6I4CoegDHA.1932%2540TK2MSFTNGP11.phx.gbl%26rn
| > um%
| > | 3D2
| > |
| > | Does Microsoft have a workaround for this?
| > |
| >
| >
|

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