[CLIENT-2512] Add option to build client with sanitizer (#494)

* Compile and link with libasan
* Stop sanitizer from exiting after first error

BUILD.md

@@ -125,6 +125,22 @@ python3 -m build
 DEBUG=1 python3 -m build
 ``` -->
 
+### Building with sanitizer enabled
+
+You can build the Python client with sanitizer to find memory errors and memory leaks. To do this, pass in an environment variable:
+```bash
+SANITIZER=1 python3 -m build
+```
+
+Then once you install the build with sanitizer, you may run a Python script using the Python client with this environment variable:
+
+```bash
+# Replace this file path with your actual libasan shared library path
+# You can find the path using this command:
+# ldconfig -p | grep libasan.so
+LD_PRELOAD=/lib/x86_64-linux-gnu/libasan.so.6 python3 -c "import aerospike"
+```
+
 ### Troubleshooting macOS
 
 In some versions of macOS, Python 2.7 is installed as ``python`` with

setup.py

@@ -64,10 +64,24 @@
     '-DMARCH_' + machine,
     '-Wno-implicit-function-declaration'
 ]
+
 if machine == 'x86_64':
     extra_compile_args.append('-march=nocona')
 extra_objects = []
+
 extra_link_args = []
+
+SANITIZER=os.getenv('SANITIZER')
+if SANITIZER:
+    sanitizer_flags = [
+        '-fsanitize=address',
+        '-fsanitize-recover=all'
+    ]
+    extra_compile_args.extend(sanitizer_flags)
+
+    extra_link_args.append("-static-libasan")
+    extra_link_args.extend(sanitizer_flags)
+
 library_dirs = ['/usr/local/opt/openssl/lib', '/usr/local/lib']
 libraries = [
     'ssl',