Re: [tor-bugs] #18934 [Core Tor/Tor]: test suite failures with expensive hardening.

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#18934: test suite failures with expensive hardening.
----------------------------+------------------------------------
 Reporter:  weasel          |          Owner:  nickm
     Type:  defect          |         Status:  needs_review
 Priority:  Medium          |      Milestone:  Tor: 0.2.9.x-final
Component:  Core Tor/Tor    |        Version:  Tor: unspecified
 Severity:  Normal          |     Resolution:
 Keywords:  review-group-1  |  Actual Points:
Parent ID:                  |         Points:  very-small
 Reviewer:                  |        Sponsor:
----------------------------+------------------------------------
Changes (by cypherpunks):

 * status:  reopened => needs_review


Comment:

 Turns out the solution was archived in
 `contrib/clang/sanitize_blacklist.txt`.
 {{{
 # we need to allow the tor bt handler to catch SIGSEGV
 # otherwise address sanitizer munges the expected output and the test
 fails
 # we can do this by setting an environmental variable
 # See https://code.google.com/p/address-sanitizer/wiki/Flags
 # ASAN_OPTIONS=allow_user_segv_handler=1
 }}}

 Unfortunately the `allow_user_segv_handler` is not supported by older GCC
 versions but they do support `handle_segv=0` which prevents
 AddressSanitizer from installing its own segfault handler. The patch
 attachment:0001-Prevent-ASAN-from-registering-a-SIGSEGV-handler.patch
 fixed the issue for me.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18934#comment:15>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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