Re: Issue with building RPMs with ASAN_ON

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> Date: Tue, 18 Jun 2019 07:54:43 +0200
> From: Viktor Ashirov <vashirov@xxxxxxxxxx>

> On Tue, Jun 18, 2019 at 1:30 AM Simon Pichugin <spichugi@xxxxxxxxxx> wrote:
>>
>> Hi team,
>> I'm in the process of creating a Vagrant file which is close to the customer's ENV.
>> It is heavilly based on Viktor's beaker task.
>> I use it for building and testing my code. And it is pretty important to build with ASAN.
>>
>> Currently, what I do is:
>> 1. Set 'ASAN_ON = 1' in rpm.mk
>> 2. Run `make -f rpm.mk srpms` target
>> 3. Build the RPM using `mock -q my_generated.srpm`
>> 4. Install it
>>
>> Then I've tried running `dscreate` manually or running tests with py.test.
>> Every time I have the same error here: /run/dirsrv/ns-slapd-standalone1.asan.XXXXX
>>
>>     ==22487==LeakSanitizer has encountered a fatal error.
>>     ==22487==HINT: For debugging, try setting environment variable LSAN_OPTIONS=verbosity=1:log_threads=1
>>     ==22487==HINT: LeakSanitizer does not work under ptrace (strace, gdb, etc)
> Ludwig also recently had this issue. Looks like you're hitting this
> bug: https://github.com/google/sanitizers/issues/723

This bug report is about trying to access mprotect'd memory. It's not directly
caused by using memalign. Looks like a red herring.

> We're using posix_memalign() in a few places and LeakSanitizier can't handle it.
> There is a workaround in the last comment. I did the builds for gcc8
> and gcc9 in copr, both internal and fedora one, but they failed (not
> related to the patch).
> So I did a local build with the patch and it worked like a charm. I
> will share the links to the rpms for you to try.
> 
> Perhaps we should review our usage of posix_memalign() or convince the
> upstream to implement a proper fix for this.


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