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signal_pre_syscall ("sysnums" test)

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edmund.gri...@gmail.com

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Dec 5, 2024, 1:08:31 PM12/5/24
to DynamoRIO Users
I was looking at the "sysnums" test because on one of our test machines with debug it takes a bit more than the 90 seconds that are allowed and therefore usually fails.

There is a comment in the source that says: "Our 1K * 100 outer loop iters does make the drcacheoff.sysnums test a little slow, but is required to hit the interrupted block case in my tests on my x86 and a64 machines."

I would like to see if I can make it hit the interesting case more frequently. How can I check if the interesting case has been hit? Can anyone suggest a temporary modification to DynamoRIO that I could use for that purpose?

Edmund

Derek Bruening

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Dec 6, 2024, 1:57:59 PM12/6/24
to edmund.gri...@gmail.com, DynamoRIO Users
Look at the commit description https://github.com/DynamoRIO/dynamorio/commit/a9da82f3bb851ebddf94e371d943d425d15c45b0 where signal_pre_syscall.c was added: it describes what the test's main goal is and points at https://github.com/DynamoRIO/dynamorio/issues/6128 which has further info.

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