(travis) Add a couple AddressSANitizer-instrumented jobs

While *much* slower (~2.5x) to run, it provides invaluable insights into
various instances of memory corruption within te perl VM itself and more
importantly various XS libs. With an excellent UX to top it off.

This is especially relevant now that *BSD is cranking up its in-kernel
enabled-by-default memory checks and things that seem to work fine elsewhere
end up throwing SIGBUS/SIGSEGV left and right:
http://matrix.cpantesters.org/?dist=DBIx-Class+0.082841;os=openbsd;reports=1#sl=0,0

CHangeset based on work leading to the diagnosis of
https://metacpan.org/diff/file?source=ISHIGAKI/DBD-SQLite-1.56&target=ISHIGAKI/DBD-SQLite-1.57_01#dbdimp.c

As of this commit we still expect things to fail, as we hard-froze DBD::SQLite
at its broken state. Subsequent commits will fix this and other issues.

.travis.yml

@@ -211,6 +211,61 @@ matrix:
     ###
     # Start of the allow_failures block
 
+    # ASan-instrumented threaded latest 5.24 with blead CPAN, no tests on depchain ( run only DBICs tests )
+    - perl: "devcpan_5.24.3_thr_asan"
+      sudo: required
+      dist: trusty
+      env:
+        - CLEANTEST=false
+        - DEVREL_DEPS=true
+        - BREWVER=5.24.3
+        # FIXME - something in perl confuses ASan, do no trace leaks for now
+        #         https://www.nntp.perl.org/group/perl.perl5.porters/2018/03/msg250024.html
+        #         https://www.nntp.perl.org/group/perl.perl5.porters/2018/03/msg250022.html
+        - ASAN_OPTIONS=detect_leaks=0
+        - ASAN_FLAGS_COMMON="-fsanitize=address -fuse-ld=gold -fno-omit-frame-pointer -g -O2"
+        # FIXME - need to switch to gcc-7 for -fsanitize-address-use-after-scope,
+        #         https://github.com/travis-ci/apt-package-whitelist/issues/3933
+        #         https://travis-ci.org/Perl5/DBIx-Class/jobs/356823605#L3479-L3926
+        - BREWOPTS="-Duseithreads -Dcc=gcc-6 -Accflags='$ASAN_FLAGS_COMMON' -Aldflags='$ASAN_FLAGS_COMMON'"
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - libc6
+            - libc6:i386
+            - binutils
+            - gcc-6
+
+    # ASan-instrumented threaded bleadperl with blead CPAN, full depchain test ( but only DBD::SQLite is used )
+    - perl: "devcpan_bleadperl_thr_mb_asan"
+      sudo: required
+      dist: trusty
+      env:
+        - CLEANTEST=true
+        - DEVREL_DEPS=true
+        # FIXME - temp workaround for https://github.com/gugod/App-perlbrew/issues/606
+        - BREWVER=5.27.10
+        # FIXME - something in perl confuses ASan, do no trace leaks for now
+        #         https://www.nntp.perl.org/group/perl.perl5.porters/2018/03/msg250024.html
+        #         https://www.nntp.perl.org/group/perl.perl5.porters/2018/03/msg250022.html
+        - ASAN_OPTIONS=detect_leaks=0
+        - ASAN_FLAGS_COMMON="-fsanitize=address -fuse-ld=gold -fno-omit-frame-pointer -g -O2"
+        # FIXME - need to switch to gcc-7 for -fsanitize-address-use-after-scope,
+        #         https://github.com/travis-ci/apt-package-whitelist/issues/3933
+        #         https://travis-ci.org/Perl5/DBIx-Class/jobs/356823605#L3479-L3926
+        - BREWOPTS="-Duseithreads -Dusemorebits -Dcc=gcc-6 -Accflags='$ASAN_FLAGS_COMMON' -Aldflags='$ASAN_FLAGS_COMMON'"
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - libc6
+            - libc6:i386
+            - binutils
+            - gcc-6
+
     # bleadperl with blead CPAN, single thread
     - perl: "devcpan_bleadperl_thr_mb"
       sudo: required
@@ -312,6 +367,8 @@ matrix:
   allow_failures:
 
     # these run with various dev snapshots - allowed to fail
+    - perl: devcpan_5.24.3_thr_asan
+    - perl: devcpan_bleadperl_thr_mb_asan
     - perl: devcpan_bleadperl_thr_mb
     - perl: bleadperl
     - perl: devcpan_5.8.1_thr_mb

maint/travis-ci_scripts/30_before_script.bash

@@ -135,7 +135,7 @@ else
   parallel_installdeps_notest Test::Warn B::Hooks::EndOfScope Test::Differences HTTP::Status
   parallel_installdeps_notest Test::Pod::Coverage Test::EOL Devel::GlobalDestruction Sub::Name MRO::Compat Class::XSAccessor URI::Escape HTML::Entities
   parallel_installdeps_notest YAML LWP Class::Trigger Class::Accessor::Grouped Package::Variant
-  parallel_installdeps_notest SQL::Abstract Moose Module::[email protected] JSON SQL::Translator File::Which Class::DBI::Plugin git://github.com/ribasushi/patchup-Perl5-PPerl.git
+  parallel_installdeps_notest SQL::Abstract Moose Module::[email protected] JSON SQL::Translator File::Which Class::DBI::Plugin
 
   # FIXME - work around DateTime* bumping their minimal version for no reason ( RT#117959 )
   # ( multiple instances of this line throughout, re-grep when removing )
@@ -153,12 +153,16 @@ else
     parallel_installdeps_notest git://github.com/ribasushi/patchup-Perl5-DBD-InterBase.git
   fi
 
-  # SCGI does not install under < 5.8.8 perls nor under parallel make
+  # SCGI does not install under ASan nor < 5.8.8 perls nor under parallel make
   # FIXME: The 5.8.8 thing is likely fixable, something to do with
   # #define speedy_new(s,n,t) Newx(s,n,t)
-  if perl -M5.008008 -e 1 &>/dev/null ; then
+  if perl -M5.008008 -e 1 &>/dev/null && ! ASan_enabled ; then
     MAKEFLAGS="" bash -c "parallel_installdeps_notest git://github.com/ribasushi/patchup-Perl5-CGI-SpeedyCGI.git"
   fi
+
+  # PPerl does not work very will with ASan either
+  ASan_enabled || parallel_installdeps_notest git://github.com/ribasushi/patchup-Perl5-PPerl.git
+
 fi
 
 

maint/travis-ci_scripts/50_after_success.bash

@@ -3,7 +3,9 @@
 # this file is executed in a subshell - set up the common stuff
 source maint/travis-ci_scripts/common.bash
 
-if [[ -n "$SHORT_CIRCUIT_SMOKE" ]] || [[ "$TRAVIS_PULL_REQUEST" != "false" ]] ; then exit 0 ; fi
+if [[ -n "$SHORT_CIRCUIT_SMOKE" ]] || [[ "$TRAVIS_PULL_REQUEST" != "false" ]] || ASan_enabled; then
+  exit 0
+fi
 
 # this part needs to run in parallel unconditionally
 export VCPU_USE="$VCPU_AVAILABLE"

maint/travis-ci_scripts/common.bash

@@ -26,6 +26,8 @@ CPAN_supports_BUILDPL() { perl -MCPAN\ 1.9205 -e1 &>/dev/null; }
 
 have_sudo() { sudo /bin/true &>/dev/null ; }
 
+ASan_enabled() { perl -V:config_args | grep -q fsanitize=address ; }
+
 ci_vm_state_text() {
   echo "
 ========================== CI System information ============================
@@ -176,7 +178,7 @@ parallel_installdeps_notest() {
     "
 }
 
-export -f parallel_installdeps_notest run_or_err echo_err tstamp have_sudo CPAN_is_sane CPAN_supports_BUILDPL
+export -f parallel_installdeps_notest run_or_err echo_err tstamp have_sudo ASan_enabled CPAN_is_sane CPAN_supports_BUILDPL
 
 installdeps() {
   if [[ -z "$@" ]] ; then return; fi