Bug 958376 - |mach valgrind-test|: Add a --suppressions option. r=gps.

--HG--
extra : rebase_source : 2e8e6618bb3b1a68ee25efb4c76acb8e53a5a4b2

build/valgrind/mach_commands.py

@@ -8,8 +8,9 @@ import os
 import subprocess
 
 from mach.decorators import (
-    CommandProvider,
     Command,
+    CommandArgument,
+    CommandProvider,
 )
 from mozbuild.base import (
     MachCommandBase,
@@ -34,7 +35,12 @@ class MachCommands(MachCommandBase):
     @Command('valgrind-test', category='testing',
         conditions=[conditions.is_firefox, is_valgrind_build],
         description='Run the Valgrind test job.')
-    def valgrind_test(self):
+    @CommandArgument('--suppressions', default=[], action='append',
+        metavar='FILENAME',
+        help='Specify a suppression file for Valgrind to use. Use '
+            '--suppression multiple times to specify multiple suppression '
+            'files.')
+    def valgrind_test(self, suppressions):
         import json
         import sys
         import tempfile
@@ -101,6 +107,9 @@ class MachCommands(MachCommandBase):
                 '--track-origins=yes'
             ]
 
+            for s in suppressions:
+                valgrind_args.append('--suppressions=' + s)
+
             supps_dir = os.path.join(build_dir, 'valgrind')
             supps_file1 = os.path.join(supps_dir, 'cross-architecture.sup')
             valgrind_args.append('--suppressions=' + supps_file1)