[tor-bugs] #20066 [Core Tor/Tor]: Make test-memwipe work better on OpenBSD

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#20066: Make test-memwipe work better on OpenBSD
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     Reporter:  rubiate       |      Owner:
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  openbsd
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 Where "work" means access freed buffers without exploding.

 It currently segfaults 100% of the time but it could be "fixed" by setting
 the malloc.conf options in the program to turn off some of the
 protections.

 's' will turn off malloc canaries (among other things). This stops it
 segfaulting. 'c' would do the same thing but would break on releases older
 than 5.9 which didn't have that option. 's' also means any new protections
 that are enabled by default will be turned off, which might help this keep
 working in the future.

 Junking has two levels, so it needs 2x 'j' to guarantee it's turned off.
 This makes the warning about unreliable results go away.

 Freelist and unmap protection aren't on by default but it will crash if it
 is, so a 'u' and 'f' will ensure it's off (it does nothing if it's already
 off).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20066>
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