Bug 1499043 - ensure JSGC_DISABLE_POISONING is enable for raptor and jsshell-bench tests r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D8729

--HG--
extra : moz-landing-system : lando

testing/jsshell/benchmark.py

@@ -110,12 +110,19 @@ class Benchmark(object):
     def run(self):
         self.reset()
 
+        # Update the environment variables
+        env = os.environ.copy()
+
+        # disable "GC poisoning" Bug# 1499043
+        env['JSGC_DISABLE_POISONING'] = '1'
+
         process_args = {
             'cmd': self.command,
             'cwd': self.path,
             'onFinish': self.collect_results,
             'processOutputLine': self.process_line,
             'stream': sys.stdout,
+            'env': env,
         }
         proc = ProcessHandler(**process_args)
         proc.run()

testing/mozharness/mozharness/mozilla/testing/raptor.py

@@ -440,6 +440,9 @@ class Raptor(TestingMixin, MercurialScript, CodeCoverageMixin, AndroidMixin):
         env['SCRIPTSPATH'] = scripts_path
         env['EXTERNALTOOLSPATH'] = external_tools_path
 
+        # disable "GC poisoning" Bug# 1499043
+        env['JSGC_DISABLE_POISONING'] = '1'
+
         if self.repo_path is not None:
             env['MOZ_DEVELOPER_REPO_DIR'] = self.repo_path
         if self.obj_path is not None: