Use a special test launcher that links the sanitize runtime library directly

.gitignore

@@ -7,3 +7,4 @@ build
 README.html
 linux-package
 logo/*.iconset
+test-launcher

.travis.yml

@@ -6,7 +6,7 @@ matrix:
           group: beta
           sudo: false
           env:
-            - CC=gcc ASANLIB=libasan.so.0 ASAN_ARG=--asan
+            - CC=gcc SANITIZE_ARG=--sanitize
           language: python
           python: "3.5"
           addons:
@@ -24,7 +24,25 @@ matrix:
           group: beta
           sudo: false
           env:
-            - CC=clang RUN_FLAKE=1 BUILD_PKG=1
+            - CC=clang SANITIZE_ARG=--sanitize
+          language: python
+          python: "3.5"
+          addons:
+            apt:
+              packages:
+                - libfontconfig1-dev
+                - libglew-dev
+                - libxi-dev
+                - libxrandr-dev
+                - libxinerama-dev
+                - libxcursor-dev
+
+        - os: linux
+          dist: trusty
+          group: beta
+          sudo: false
+          env:
+            - RUN_FLAKE=1 BUILD_PKG=1
           language: python
           python: "3.5"
           addons:
@@ -45,6 +63,13 @@ matrix:
           language: generic
           env: USE_BREW=1 BUILD_PKG=1
 
+env:
+    global:
+        - PYTHON=python3
+        - PKG_CONFIG_PATH=$HOME/glfw/lib/pkgconfig:$PKG_CONFIG_PATH
+        - LD_LIBRARY_PATH=$HOME/glfw/lib:$LD_LIBRARY_PATH
+        - ASAN_OPTIONS=leak_check_at_exit=0
+
 install: |
     set -e
     if [[ "$RUN_FLAKE" == "1" ]]; then pip install flake8; fi
@@ -59,7 +84,7 @@ install: |
         fi
     else
         wget -O glfw-3.2.1.zip https://github.com/glfw/glfw/archive/3.2.1.zip
-        unzip glfw-3.2.1.zip
+        unzip -q glfw-3.2.1.zip
         cd glfw-3.2.1
         cmake -DBUILD_SHARED_LIBS=ON -DGLFW_BUILD_EXAMPLES=OFF -DGLFW_BUILD_TESTS=OFF -DGLFW_BUILD_DOCS=OFF -DCMAKE_INSTALL_PREFIX=$HOME/glfw
         make
@@ -67,17 +92,18 @@ install: |
         cd ..
     fi
     pkg-config --cflags glfw3
+    if [[ "$TRAVIS_OS_NAME" != 'osx' ]]; then
+        PLIB=$(ldd `which python` | grep libpython | cut -d ' ' -f 3)
+        export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:`dirname $PLIB`
+    fi
     set +e
 
-env:
-    global:
-        - PKG_CONFIG_PATH=$HOME/glfw/lib/pkgconfig
-        - LD_LIBRARY_PATH=$HOME/glfw/lib
-        - ASAN_OPTIONS=leak_check_at_exit=0
-        - PYTHON=python3
 before_script:
-    - $PYTHON setup.py build --debug $ASAN_ARG;
+    - echo $LD_LIBRARY_PATH
+    - $PYTHON setup.py build --debug $SANITIZE_ARG;
+    - if [[ "$TRAVIS_OS_NAME" != 'osx' ]]; then ldd ./test-launcher `which $PYTHON`; fi
+
 script:
-    - LD_PRELOAD=$ASANLIB $PYTHON setup.py test
+    - ./test-launcher
     - if [[ "$RUN_FLAKE" == "1" ]]; then flake8 --count .; fi
     - if [[ "$BUILD_PKG" == "1" ]]; then $PYTHON setup.py linux-package; fi

kitty/freetype.c

@@ -140,7 +140,7 @@ static PyStructSequence_Field gm_fields[] = {
 };
 
 static PyStructSequence_Desc gm_desc = {"GlpyhMetrics", NULL, gm_fields, 8};
-static PyTypeObject GlpyhMetricsType = {0};
+static PyTypeObject GlpyhMetricsType = {{{0}}};
 
 static PyObject*
 glyph_metrics(Face *self) {
@@ -167,7 +167,7 @@ static PyStructSequence_Field bm_fields[] = {
     {NULL}
 };
 static PyStructSequence_Desc bm_desc = {"Bitmap", NULL, bm_fields, 7};
-static PyTypeObject BitmapType = {0};
+static PyTypeObject BitmapType = {{{0}}};
 
 static PyObject*
 bitmap(Face *self) {

kitty/history.c

@@ -95,7 +95,7 @@ index_type historybuf_push(HistoryBuf *self) {
 
 bool
 historybuf_resize(HistoryBuf *self, index_type lines) {
-    HistoryBuf t = {0};
+    HistoryBuf t = {{0}};
     t.xnum=self->xnum;
     t.ynum=lines;
     if (t.ynum > 0 && t.ynum != self->ynum) {

kitty/line-buf.c

@@ -423,7 +423,7 @@ copy_old(LineBuf *self, PyObject *y) {
     if (!PyObject_TypeCheck(y, &LineBuf_Type)) { PyErr_SetString(PyExc_TypeError, "Not a LineBuf object"); return NULL; }
     LineBuf *other = (LineBuf*)y;
     if (other->xnum != self->xnum) { PyErr_SetString(PyExc_ValueError, "LineBuf has a different number of columns"); return NULL; }
-    Line sl = {0}, ol = {0};
+    Line sl = {{0}}, ol = {{0}};
     sl.xnum = self->xnum; ol.xnum = other->xnum;
 
     for (index_type i = 0; i < MIN(self->ynum, other->ynum); i++) {

setup.py

@@ -53,7 +53,7 @@ def cc_version():
         ver = tuple(map(int, ver))
     except Exception:
         ver = (0, 0)
-    return ver
+    return cc, ver
 
 
 def get_python_flags(cflags):
@@ -88,36 +88,43 @@ def get_python_flags(cflags):
     return libs
 
 
-def init_env(debug=False, asan=False, native_optimizations=True):
+def get_sanitize_args(cc, ccver):
+    sanitize_args = set()
+    sanitize_args.add('-fno-omit-frame-pointer')
+    sanitize_args.add('-fsanitize=address')
+    if (cc == 'gcc' and ccver >= (5, 0)) or cc == 'clang':
+        sanitize_args.add('-fsanitize=undefined')
+        # if cc == 'gcc' or (cc == 'clang' and ccver >= (4, 2)):
+        #     sanitize_args.add('-fno-sanitize-recover=all')
+    return sanitize_args
+
+
+def init_env(debug=False, sanitize=False, native_optimizations=True):
     global cflags, ldflags, cc, ldpaths
-    native_optimizations = native_optimizations and not asan and not debug
-    ccver = cc_version()
+    native_optimizations = native_optimizations and not sanitize and not debug
+    cc, ccver = cc_version()
+    print('CC:', cc, ccver)
     stack_protector = '-fstack-protector'
-    if ccver >= (4, 9):
+    if ccver >= (4, 9) and cc == 'gcc':
         stack_protector += '-strong'
     missing_braces = ''
-    if ccver < (5, 2):
+    if ccver < (5, 2) and cc == 'gcc':
         missing_braces = '-Wno-missing-braces'
-    cc = os.environ.get('CC', 'gcc')
-    optimize = '-O3'
-    if debug or asan:
-        optimize = '-ggdb'
-        if asan:
-            optimize += ' -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all -fno-omit-frame-pointer'
+    optimize = '-ggdb' if debug or sanitize else '-O3'
+    sanitize_args = get_sanitize_args(cc, ccver) if sanitize else set()
     cflags = os.environ.get(
         'OVERRIDE_CFLAGS', (
             '-Wextra -Wno-missing-field-initializers -Wall -std=c99 -D_XOPEN_SOURCE=700'
-            ' -pedantic-errors -Werror {} -DNDEBUG -fwrapv {} {} -pipe {}'
+            ' -pedantic-errors -Werror {} {} -DNDEBUG -fwrapv {} {} -pipe {}'
         ).format(
-            optimize, stack_protector, missing_braces, '-march=native'
+            optimize, ' '.join(sanitize_args), stack_protector, missing_braces, '-march=native'
             if native_optimizations else ''
         )
     )
     cflags = shlex.split(cflags
                          ) + shlex.split(sysconfig.get_config_var('CCSHARED'))
     ldflags = os.environ.get(
-        'OVERRIDE_LDFLAGS', '-Wall ' +
-        ('-fsanitize=address -fsanitize=undefined' if asan else ('' if debug else '-O3'))
+        'OVERRIDE_LDFLAGS', '-Wall ' + ' '.join(sanitize_args) + ('' if debug else ' -O3')
     )
     ldflags = shlex.split(ldflags)
     cflags += shlex.split(os.environ.get('CFLAGS', ''))
@@ -230,11 +237,13 @@ def option_parser():
         help='Build extension modules with debugging symbols'
     )
     p.add_argument(
-        '--asan',
+        '--sanitize',
         default=False,
         action='store_true',
-        help='Turn on address sanitization to detect memory access errors. Note that if you do turn it on,'
-        ' you have to run kitty with the environment variable LD_PRELOAD=/usr/lib/libasan.so'
+        help='Turn on sanitization to detect memory access errors and undefined behavior. Note that if you do turn it on,'
+        ' a special executable will be built for running the test suite. If you want to run normal kitty'
+        ' with sanitization, use LD_PRELOAD=libasan.so (for gcc) and'
+        ' LD_PRELOAD=/usr/lib/clang/4.0.0/lib/linux/libclang_rt.asan-x86_64.so (for clang, changing path as appropriate).'
     )
     p.add_argument(
         '--prefix',
@@ -268,7 +277,7 @@ def find_c_files():
 
 
 def build(args, native_optimizations=True):
-    init_env(args.debug, args.asan, native_optimizations)
+    init_env(args.debug, args.sanitize, native_optimizations)
     compile_c_extension(
         'kitty/fast_data_types', args.incremental, *find_c_files()
     )
@@ -281,6 +290,18 @@ def safe_makedirs(path):
         pass
 
 
+def build_test_launcher(args):
+    cc, ccver = cc_version()
+    cflags = '-g -Wall -Werror -fpie'.split()
+    pylib = get_python_flags(cflags)
+    sanitize_lib = (['-lasan'] if cc == 'gcc' else []) if args.sanitize else []
+    cflags.extend(get_sanitize_args(cc, ccver) if args.sanitize else [])
+    cmd = [cc] + cflags + [
+        'test-launcher.c', '-o', 'test-launcher',
+    ] + sanitize_lib + pylib
+    run_tool(cmd)
+
+
 def package(args, for_bundle=False):  # {{{
     ddir = args.prefix
     libdir = os.path.join(ddir, 'lib', 'kitty')
@@ -360,6 +381,7 @@ def main():
     os.chdir(os.path.dirname(os.path.abspath(__file__)))
     if args.action == 'build':
         build(args)
+        build_test_launcher(args)
     elif args.action == 'test':
         os.execlp(
             sys.executable, sys.executable, os.path.join(base, 'test.py')

test-launcher.c

@@ -0,0 +1,13 @@
+/*
+ * linux-launcher.c
+ * Copyright (C) 2017 Kovid Goyal <kovid at kovidgoyal.net>
+ *
+ * Distributed under terms of the GPL3 license.
+ */
+
+#include <Python.h>
+
+int main(int argc, char *argv[]) {
+    wchar_t *wargv[2] = {L"kitty-test", L"test.py"};
+    return Py_Main(2, wargv);
+}