Re: Thoughts on infant mortality...

[Dan Sugalski]

At 4:17 PM +0000 1/9/03, Nicholas Clark wrote:

On Thu, Jan 09, 2003 at 01:32:57PM +0100, Leopold Toetsch wrote:

 But I still favor the combination of:
 - code reordering, like done for pmc_new
 - DOD/GC disabling (e.g. aggregate clone)
 - active anchoring to the root set, where above is not applicable

Which combined means that there is no stackwalking?

While I'd like no stack walking, as it's pricey, I'm not sure it's tenable. Skipping it makes things rather more fragile, as it means that any code that may potentially trigger a DOD run while holding an unrooted object needs to root it temporarily, and that's a lot of code. Calling any vtable or string function will do it, which is pretty common for most of the operations that are creating new objects.

We could probably twist the design around such that unrooted live objects are impossible, but I'm not sure I'm up to that level of brain twisting.
--
Dan

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