[Bug 1685693] [NEW] [Feature] GLK:Support generating PTWRITE in uprobes

quanxian quanxian.wang at intel.com
Mon Apr 24 03:26:17 UTC 2017

Public bug reported:

Logging values in uprobes is very slow because any logging to a ring buffer requires a kernel trap. uprobes already has a trampoline of dynamically generated code mapped into user processes.
With PTWRITE we could generate PTWRITE instructions there that log data items requested by the user in the uprobes configuration string.
In theory the same could be also done for kprobes, although it is less critical there as kprobes already support fast software logging.

Target Kernel:4.11?
Target Release: 17.10

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

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  [Feature] GLK:Support generating PTWRITE in uprobes

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