Add -shared-libasan

.builder/actions/setup_asan.py

@@ -0,0 +1,24 @@
+import Builder
+
+import os
+import re
+import subprocess
+
+
+class SetupAsan(Builder.Action):
+    def run(self, env):
+        self.env = env
+
+        compiler = os.getenv('CC')
+        proc = subprocess.run([compiler, '-print-file-name=libclang_rt.asan-x86_64.so'], stdout=subprocess.PIPE)
+        proc.check_returncode()
+        path = proc.stdout.decode().strip()
+        self._setenv('LD_PRELOAD', path)
+
+    def _setenv(self, var, value):
+        """
+        Set environment variable now,
+        and ensure the environment variable is set again when tests run
+        """
+        self.env.shell.setenv(var, value)
+        self.env.project.config['test_env'][var] = value

builder.json

@@ -22,5 +22,14 @@
     "env": {
         "LSAN_OPTIONS": "suppressions={source_dir}/tests/resources/suppressions-lsan.txt:allow_addr2line=1",
         "ASAN_OPTIONS": "suppressions={source_dir}/tests/resources/suppressions-asan.txt"
+    },
+    "compilers": {
+        "clang": {
+            "+post_build_steps": ["setup-asan"],
+            "cmake_args": [
+                "-DCMAKE_C_FLAGS=-shared-libasan",
+                "-DCMAKE_CXX_FLAGS=-shared-libasan"
+            ]
+        }
     }
 }