[iOS] Make CWTChromeDriver's launch script work with ASan builds

When launching an ASan build of CWTChromeDriver,
libclang_rt.asan_iossim_dynamic.dylib needs to be included
in DYLD_INSERT_LIBRARIES.

This CL updates launch scripts to include this value when
using ASan.

This is needed as part of adapting CWTChromeDriver for fuzzing.

Bug: 1158540
Change-Id: I924f865027ac8c50deeec2eaa401647efff62452
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633681Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Ali Juma <ajuma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844970}

ios/build/bots/scripts/test_apps.py

@@ -84,7 +84,8 @@ class GTestsApp(object):
                test_args=None,
                env_vars=None,
                release=False,
-               host_app_path=None):
+               host_app_path=None,
+               inserted_libs=None):
     """Initialize Egtests.
 
     Args:
@@ -99,6 +100,7 @@ class GTestsApp(object):
         launching.
       env_vars: List of environment variables to pass to the test itself.
       release: (bool) Whether the app is release build.
+      inserted_libs: List of libraries to insert when running the test.
 
     Raises:
       AppNotFoundError: If the given app does not exist
@@ -118,6 +120,7 @@ class GTestsApp(object):
     self.module_name = os.path.splitext(os.path.basename(test_app))[0]
     self.release = release
     self.host_app_path = host_app_path
+    self.inserted_libs = inserted_libs or []
 
   def fill_xctest_run(self, out_dir):
     """Fills xctestrun file by egtests.
@@ -175,6 +178,10 @@ class GTestsApp(object):
         }
     }
 
+    if self.inserted_libs:
+      module_data['TestingEnvironmentVariables'][
+          'DYLD_INSERT_LIBRARIES'] = ':'.join(self.inserted_libs)
+
     xctestrun_data = {module: module_data}
     kif_filter = []
     gtest_filter = []
@@ -284,7 +291,8 @@ class EgtestsApp(GTestsApp):
                test_args=None,
                env_vars=None,
                release=False,
-               host_app_path=None):
+               host_app_path=None,
+               inserted_libs=None):
     """Initialize Egtests.
 
     Args:
@@ -299,13 +307,17 @@ class EgtestsApp(GTestsApp):
         launching.
       env_vars: List of environment variables to pass to the test itself.
       host_app_path: (str) full path to host app.
+      inserted_libs: List of libraries to insert when running the test.
 
     Raises:
       AppNotFoundError: If the given app does not exist
     """
+    inserted_libs = list(inserted_libs or [])
+    inserted_libs.append('__PLATFORMS__/iPhoneSimulator.platform/Developer/'
+                         'usr/lib/libXCTestBundleInject.dylib')
     super(EgtestsApp,
           self).__init__(egtests_app, included_tests, excluded_tests, test_args,
-                         env_vars, release, host_app_path)
+                         env_vars, release, host_app_path, inserted_libs)
 
   def _xctest_path(self):
     """Gets xctest-file from egtests/PlugIns folder.
@@ -337,10 +349,6 @@ class EgtestsApp(GTestsApp):
     """
     xctestrun_data = super(EgtestsApp, self).fill_xctestrun_node()
     module_data = xctestrun_data[self.module_name + '_module']
-
-    module_data['TestingEnvironmentVariables']['DYLD_INSERT_LIBRARIES'] = (
-        '__PLATFORMS__/iPhoneSimulator.platform/Developer/'
-        'usr/lib/libXCTestBundleInject.dylib')
     module_data['TestBundlePath'] = '__TESTHOST__/%s' % self._xctest_path()
     module_data['TestingEnvironmentVariables'][
         'XCInjectBundleInto'] = '__TESTHOST__/%s' % self.module_name

ios/chrome/test/wpt/tools/run_cwt_chromedriver.py

@@ -36,6 +36,9 @@ parser.add_argument('--out-dir', default='/tmp/cwt_chromedriver',
     help='Output directory for CWTChromeDriver\'s dummy test case')
 parser.add_argument('--os', default='14.3', help='iOS version')
 parser.add_argument('--device', default='iPhone 11 Pro', help='Device type')
+parser.add_argument('--asan-build', help='Use ASan-related libraries',
+    dest='asan_build', action='store_true')
+parser.set_defaults(asan_build=False)
 args=parser.parse_args()
 
 test_app = os.path.join(
@@ -51,9 +54,14 @@ if not os.path.exists(args.out_dir):
 # skipped, meaning that CWTChromeDriver's http server won't get launched.
 output_directory = os.path.join(args.out_dir, 'run%d' %  int(time.time()))
 
+inserted_libs = []
+if args.asan_build:
+  inserted_libs = [os.path.join(args.build_dir,
+      'libclang_rt.asan_iossim_dynamic.dylib')]
+
 egtests_app = test_apps.EgtestsApp(
     egtests_app=test_app, test_args=['--port %s' % args.port],
-    host_app_path=host_app)
+    host_app_path=host_app, inserted_libs=inserted_libs)
 
 launch_command = xcodebuild_runner.LaunchCommand(egtests_app, destination,
     shards=1, retries=1, out_dir=output_directory)