Exterminator- A ... with High Probability.pdf - DSpace at CUSAT ...
Exterminator- A ... with High Probability.pdf - DSpace at CUSAT ...
Exterminator- A ... with High Probability.pdf - DSpace at CUSAT ...
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<strong>Extermin<strong>at</strong>or</strong><br />
rebuild these tables on-the-fly, <strong>Extermin<strong>at</strong>or</strong> can apply p<strong>at</strong>ches to running programs<br />
<strong>with</strong>out interrupting their execution. This aspect of <strong>Extermin<strong>at</strong>or</strong>’s oper<strong>at</strong>ion may be<br />
especially useful for systems th<strong>at</strong> must be kept running continuously.<br />
On every dealloc<strong>at</strong>ion, the correcting alloc<strong>at</strong>or checks to see if the object to be freed<br />
needs to be deferred. If it finds a deferral value for the object’s alloc<strong>at</strong>ion and dealloc<strong>at</strong>ion<br />
site, it pushes onto the deferral priority queue the pointer and the time to actually free it<br />
(the current alloc<strong>at</strong>ion time plus the deferral value).<br />
The correcting alloc<strong>at</strong>or then checks the deferral queue on every alloc<strong>at</strong>ion to see if<br />
an object should now be freed. It then checks whether the current alloc<strong>at</strong>ion site has an<br />
associ<strong>at</strong>ed pad value. If so, it adds the pad value to the alloc<strong>at</strong>ion request, and forwards the<br />
alloc<strong>at</strong>ion request to the underlying alloc<strong>at</strong>or.<br />
Dept. Of Computer Science & Engg. ~ 17 ~ Cochin University of Science & Technology
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