* translator safety improvements
@ 2006-11-27 16:56 Frank Ch. Eigler
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From: Frank Ch. Eigler @ 2006-11-27 16:56 UTC (permalink / raw)
To: systemtap
Hi -
I committed a small bunch of changes to the translator, in furtherance
of PR 2725 and others. The changes include:
- adding low-level locking functions to the blacklist, for avoidance
of reentrancy. If your script depended on these, let me know.
- added an available-stack-space check done at every probe handler.
This could accidentally break a few currently working scripts, by
blocking their function if the probes are placed into a too-deeply-nested
region of kernel space-time. If your script breaks, please let me know.
- added architecture/version matching at translation time to detect
debuginfo/kernel mismatches. This could accidentally break a few
platforms - see tapsets.cxx:2797.
I'm getting good results with these changes against broad kernel
probes. Doing some craa-aazy stuff with kernel.function("*") is
not far away.
- FChE
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2006-11-27 16:56 translator safety improvements Frank Ch. Eigler
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