[Vm-dev] SystemTracing: SystemTracing-dtl.23.mcz

stephane ducasse stephane.ducasse at gmail.com
Mon Dec 12 07:08:03 UTC 2011


BTW the pharoTaskForces repo is open for write.

On Dec 12, 2011, at 5:01 AM, David T. Lewis wrote:

> Hi Stef,
> I loaded the PharoTaskForces version of SystemTracing into a Pharo
> image, then did the update to handle block closures. I was able
> to convert the Pharo 1.4 image to 64-bit format and run it under
> an interpreter VM for 64-bit object memory.
> To update the PharoTaskForces version, you can file in the attached
> SystemTracer2-writeAndTrace.st. This will not cause any problems
> for tracing to 32-bit formats, but will allow you to also trace
> to a 64-bit format if you like.
> You also will want to fix SystemTracer64>>writeFileHeader to use
> 'Smalltalk vm extraVMMemory' instead of 'SmalltalkImage current extraVMMemory'
> otherwise you will get a deprecation warning that will hang your
> image after doing the trace.
> Dave
> On Fri, Dec 09, 2011 at 05:30:16PM -0500, David T. Lewis wrote:
>> Thanks Stef,
>> I'll try to look at it when I get a chance. I did a quick check with
>> Pharo 1.4, but I just did not have enough time to follow up on the issues.
>> I'll have a look at PharoTaskForces because I'm sure it's addressed there.
>> Dave
>> On Fri, Dec 09, 2011 at 10:52:44PM +0100, stephane ducasse wrote:
>>> hi david
>>> the systemTracing package for pharo is available in PharoTaskForces
>>> I do not know what changed compared with the one of squeak.
>>> Stef
>>> On Dec 8, 2011, at 6:49 PM, David T. Lewis wrote:
>>>> This is an update to the system tracer that makes it possible to
>>>> trace current Squeak images to 64-bit image format. Prior to this
>>>> update, only pre-closure images could be converted to 64-bit object
>>>> format.
>>>> Thanks to Eliot for the tip that pointed me to the solution, which
>>>> is that instances of BlockClosure need to have the value of their
>>>> startpc instance variable adjusted to match byte offsets in the
>>>> enclosing compiled method when converting from 32-bit to 64-bit
>>>> object format.
>>>> This works on Squeak, not yet tested on Pharo.
>>>> Dave
>>>> On Thu, Dec 08, 2011 at 05:17:49AM +0000, squeak-dev-noreply at lists.squeakfoundation.org wrote:
>>>>> Dave Lewis uploaded a new version of SystemTracing to project SystemTracing:
>>>>> http://www.squeaksource.com/SystemTracing/SystemTracing-dtl.23.mcz
>>>>> ==================== Summary ====================
>>>>> Name: SystemTracing-dtl.23
>>>>> Author: dtl
>>>>> Time: 7 December 2011, 11:17:47 am
>>>>> UUID: 9f6136af-8117-416c-bf54-baf2a32bb571
>>>>> Ancestors: SystemTracing-dtl.22
>>>>> Support tracing closure-enabled images to 64-bit object format.
>>>>> When tracing to a different word size, e.g. trace to 64-bit image from a 32-bit image, adjust the startpc of all BlockClosure instances to account for different word size in the enclosing compiled method.
> <SystemTracer2-writeAndTrace.st>

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