print core dumps on application crashes

.travis.yml

@@ -33,6 +33,11 @@ before_install:
 install:
 - make config.gypi
 - ./scripts/travis_install_test_suite.sh
+- ulimit -c
+
+before_script:
+ # Set the core file limit to unlimited so a core file is generated upon crash
+ - ulimit -c unlimited -S
 
 script:
 - ./scripts/travis_script.sh

scripts/run_tests.sh

@@ -3,8 +3,24 @@
 set -e
 set -o pipefail
 
+# allow writing core files
+ulimit -c unlimited -S
+
 cd build/${BUILDTYPE:-Release}
 
 for TEST in ./test_* ; do
-    ${TEST}
+    RESULT=0
+    ${TEST} || RESULT=$?
+
+    # output core dump if we got one
+    for DUMP in $(find ./ -maxdepth 1 -name 'core*' -print); do
+        gdb ${TEST} ${DUMP} -ex "thread apply all bt" -ex "set pagination 0" -batch
+        rm -rf ${DUMP}
+    done
+
+    # now we should present travis with the original
+    # error code so the run cleanly stops
+    if [[ ${RESULT} != 0 ]]; then
+        exit $RESULT
+    fi
 done

scripts/travis_before_install.sh

@@ -19,7 +19,7 @@ if [[ ${TRAVIS_OS_NAME} == "linux" ]]; then
     sudo apt-get -y install gcc-4.8 g++-4.8
 
     mapbox_time "install_build_tools" \
-    sudo apt-get -y install git build-essential zlib1g-dev automake \
+    sudo apt-get -y install git build-essential zlib1g-dev automake gdb \
                             libtool xutils-dev make cmake pkg-config python-pip \
                             libboost1.55-dev libboost-regex1.55-dev libcurl4-openssl-dev \
                             libpng-dev libsqlite3-dev