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Handle functions that use a nop in the arm64 fbt
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Authored by andrew on Jan 13 2021, 11:22 AM.

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Summary

To trace leaf asm functions we can insert a single nop instruction as
the first instruction in a function and trigger off this.

Sponsored by: Innovate UK

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Repository
R10 FreeBSD src repository
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Automatic diff as part of commit; lint not applicable.
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Event Timeline

Tested with dtrace -n ":::". This will trigger on memcpy as called by dtrace_getnanouptime, however it seems to be inlined by the in tree clang.

This revision is now accepted and ready to land.Jan 13 2021, 6:00 PM