Add m-esr52 at 52.6.0

1 files changed, 583 insertions, 0 deletions

diff --git a/toolkit/crashreporter/tools/unit-symbolstore.py b/toolkit/crashreporter/tools/unit-symbolstore.py
new file mode 100644
index 000000000..021efbeeb
--- /dev/null
+++ b/toolkit/crashreporter/tools/unit-symbolstore.py
@@ -0,0 +1,583 @@
+#!/usr/bin/env python
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import concurrent.futures
+import mock
+import mozunit
+import os
+import platform
+import shutil
+import struct
+import subprocess
+import sys
+import tempfile
+import unittest
+
+from mock import patch
+from mozpack.manifests import InstallManifest
+
+import symbolstore
+
+# Some simple functions to mock out files that the platform-specific dumpers will accept.
+# dump_syms itself will not be run (we mock that call out), but we can't override
+# the ShouldProcessFile method since we actually want to test that.
+def write_elf(filename):
+    open(filename, "wb").write(struct.pack("<7B45x", 0x7f, ord("E"), ord("L"), ord("F"), 1, 1, 1))
+
+def write_macho(filename):
+    open(filename, "wb").write(struct.pack("<I28x", 0xfeedface))
+
+def write_pdb(filename):
+    open(filename, "w").write("aaa")
+    # write out a fake DLL too
+    open(os.path.splitext(filename)[0] + ".dll", "w").write("aaa")
+
+writer = {'Windows': write_pdb,
+          'Microsoft': write_pdb,
+          'Linux': write_elf,
+          'Sunos5': write_elf,
+          'Darwin': write_macho}[platform.system()]
+extension = {'Windows': ".pdb",
+             'Microsoft': ".pdb",
+             'Linux': ".so",
+             'Sunos5': ".so",
+             'Darwin': ".dylib"}[platform.system()]
+
+def add_extension(files):
+    return [f + extension for f in files]
+
+class HelperMixin(object):
+    """
+    Test that passing filenames to exclude from processing works.
+    """
+    def setUp(self):
+        self.test_dir = tempfile.mkdtemp()
+        if not self.test_dir.endswith(os.sep):
+            self.test_dir += os.sep
+        symbolstore.srcdirRepoInfo = {}
+        symbolstore.vcsFileInfoCache = {}
+
+        # Remove environment variables that can influence tests.
+        for e in ('MOZ_SOURCE_CHANGESET', 'MOZ_SOURCE_REPO'):
+            try:
+                del os.environ[e]
+            except KeyError:
+                pass
+
+    def tearDown(self):
+        shutil.rmtree(self.test_dir)
+        symbolstore.srcdirRepoInfo = {}
+        symbolstore.vcsFileInfoCache = {}
+
+    def make_dirs(self, f):
+        d = os.path.dirname(f)
+        if d and not os.path.exists(d):
+            os.makedirs(d)
+
+    def add_test_files(self, files):
+        for f in files:
+            f = os.path.join(self.test_dir, f)
+            self.make_dirs(f)
+            writer(f)
+
+class TestSizeOrder(HelperMixin, unittest.TestCase):
+    def test_size_order(self):
+        """
+        Test that files are processed ordered by size on disk.
+        """
+        processed = []
+        def mock_process_file(filenames):
+            for filename in filenames:
+                processed.append((filename[len(self.test_dir):] if filename.startswith(self.test_dir) else filename).replace('\\', '/'))
+            return True
+        for f, size in (('a/one', 10), ('b/c/two', 30), ('c/three', 20)):
+            f = os.path.join(self.test_dir, f)
+            d = os.path.dirname(f)
+            if d and not os.path.exists(d):
+                os.makedirs(d)
+            open(f, 'wb').write('x' * size)
+        d = symbolstore.GetPlatformSpecificDumper(dump_syms="dump_syms",
+                                                  symbol_path="symbol_path")
+        d.ShouldProcess = lambda f: True
+        d.ProcessFiles = mock_process_file
+        d.Process(self.test_dir)
+        d.Finish(stop_pool=False)
+        self.assertEqual(processed, ['b/c/two', 'c/three', 'a/one'])
+
+
+class TestExclude(HelperMixin, unittest.TestCase):
+    def test_exclude_wildcard(self):
+        """
+        Test that using an exclude list with a wildcard pattern works.
+        """
+        processed = []
+        def mock_process_file(filenames):
+            for filename in filenames:
+                processed.append((filename[len(self.test_dir):] if filename.startswith(self.test_dir) else filename).replace('\\', '/'))
+            return True
+        self.add_test_files(add_extension(["foo", "bar", "abc/xyz", "abc/fooxyz", "def/asdf", "def/xyzfoo"]))
+        d = symbolstore.GetPlatformSpecificDumper(dump_syms="dump_syms",
+                                                  symbol_path="symbol_path",
+                                                  exclude=["*foo*"])
+        d.ProcessFiles = mock_process_file
+        d.Process(self.test_dir)
+        d.Finish(stop_pool=False)
+        processed.sort()
+        expected = add_extension(["bar", "abc/xyz", "def/asdf"])
+        expected.sort()
+        self.assertEqual(processed, expected)
+
+
+    def test_exclude_filenames(self):
+        """
+        Test that excluding a filename without a wildcard works.
+        """
+        processed = []
+        def mock_process_file(filenames):
+            for filename in filenames:
+                processed.append((filename[len(self.test_dir):] if filename.startswith(self.test_dir) else filename).replace('\\', '/'))
+            return True
+        self.add_test_files(add_extension(["foo", "bar", "abc/foo", "abc/bar", "def/foo", "def/bar"]))
+        d = symbolstore.GetPlatformSpecificDumper(dump_syms="dump_syms",
+                                                  symbol_path="symbol_path",
+                                                  exclude=add_extension(["foo"]))
+        d.ProcessFiles = mock_process_file
+        d.Process(self.test_dir)
+        d.Finish(stop_pool=False)
+        processed.sort()
+        expected = add_extension(["bar", "abc/bar", "def/bar"])
+        expected.sort()
+        self.assertEqual(processed, expected)
+
+
+def mock_dump_syms(module_id, filename, extra=[]):
+    return ["MODULE os x86 %s %s" % (module_id, filename)
+            ] + extra + [
+            "FILE 0 foo.c",
+            "PUBLIC xyz 123"]
+
+
+class TestCopyDebug(HelperMixin, unittest.TestCase):
+    def setUp(self):
+        HelperMixin.setUp(self)
+        self.symbol_dir = tempfile.mkdtemp()
+        self.mock_call = patch("subprocess.call").start()
+        self.stdouts = []
+        self.mock_popen = patch("subprocess.Popen").start()
+        stdout_iter = self.next_mock_stdout()
+        def next_popen(*args, **kwargs):
+            m = mock.MagicMock()
+            m.stdout = stdout_iter.next()
+            m.wait.return_value = 0
+            return m
+        self.mock_popen.side_effect = next_popen
+        shutil.rmtree = patch("shutil.rmtree").start()
+
+    def tearDown(self):
+        HelperMixin.tearDown(self)
+        patch.stopall()
+        shutil.rmtree(self.symbol_dir)
+
+    def next_mock_stdout(self):
+        if not self.stdouts:
+            yield iter([])
+        for s in self.stdouts:
+            yield iter(s)
+
+    def test_copy_debug_universal(self):
+        """
+        Test that dumping symbols for multiple architectures only copies debug symbols once
+        per file.
+        """
+        copied = []
+        def mock_copy_debug(filename, debug_file, guid, code_file, code_id):
+            copied.append(filename[len(self.symbol_dir):] if filename.startswith(self.symbol_dir) else filename)
+        self.add_test_files(add_extension(["foo"]))
+        self.stdouts.append(mock_dump_syms("X" * 33, add_extension(["foo"])[0]))
+        self.stdouts.append(mock_dump_syms("Y" * 33, add_extension(["foo"])[0]))
+        def mock_dsymutil(args, **kwargs):
+            filename = args[-1]
+            os.makedirs(filename + ".dSYM")
+            return 0
+        self.mock_call.side_effect = mock_dsymutil
+        d = symbolstore.GetPlatformSpecificDumper(dump_syms="dump_syms",
+                                                  symbol_path=self.symbol_dir,
+                                                  copy_debug=True,
+                                                  archs="abc xyz")
+        d.CopyDebug = mock_copy_debug
+        d.Process(self.test_dir)
+        d.Finish(stop_pool=False)
+        self.assertEqual(1, len(copied))
+
+    def test_copy_debug_copies_binaries(self):
+        """
+        Test that CopyDebug copies binaries as well on Windows.
+        """
+        test_file = os.path.join(self.test_dir, 'foo.pdb')
+        write_pdb(test_file)
+        code_file = 'foo.dll'
+        code_id = 'abc123'
+        self.stdouts.append(mock_dump_syms('X' * 33, 'foo.pdb',
+                                           ['INFO CODE_ID %s %s' % (code_id, code_file)]))
+        def mock_compress(args, **kwargs):
+            filename = args[-1]
+            open(filename, 'w').write('stuff')
+            return 0
+        self.mock_call.side_effect = mock_compress
+        d = symbolstore.Dumper_Win32(dump_syms='dump_syms',
+                                     symbol_path=self.symbol_dir,
+                                     copy_debug=True)
+        d.FixFilenameCase = lambda f: f
+        d.Process(self.test_dir)
+        d.Finish(stop_pool=False)
+        self.assertTrue(os.path.isfile(os.path.join(self.symbol_dir, code_file, code_id, code_file[:-1] + '_')))
+
+class TestGetVCSFilename(HelperMixin, unittest.TestCase):
+    def setUp(self):
+        HelperMixin.setUp(self)
+
+    def tearDown(self):
+        HelperMixin.tearDown(self)
+
+    @patch("subprocess.Popen")
+    def testVCSFilenameHg(self, mock_Popen):
+        # mock calls to `hg parent` and `hg showconfig paths.default`
+        mock_communicate = mock_Popen.return_value.communicate
+        mock_communicate.side_effect = [("abcd1234", ""),
+                                        ("http://example.com/repo", "")]
+        os.mkdir(os.path.join(self.test_dir, ".hg"))
+        filename = os.path.join(self.test_dir, "foo.c")
+        self.assertEqual("hg:example.com/repo:foo.c:abcd1234",
+                         symbolstore.GetVCSFilename(filename, [self.test_dir])[0])
+
+    @patch("subprocess.Popen")
+    def testVCSFilenameHgMultiple(self, mock_Popen):
+        # mock calls to `hg parent` and `hg showconfig paths.default`
+        mock_communicate = mock_Popen.return_value.communicate
+        mock_communicate.side_effect = [("abcd1234", ""),
+                                        ("http://example.com/repo", ""),
+                                        ("0987ffff", ""),
+                                        ("http://example.com/other", "")]
+        srcdir1 = os.path.join(self.test_dir, "one")
+        srcdir2 = os.path.join(self.test_dir, "two")
+        os.makedirs(os.path.join(srcdir1, ".hg"))
+        os.makedirs(os.path.join(srcdir2, ".hg"))
+        filename1 = os.path.join(srcdir1, "foo.c")
+        filename2 = os.path.join(srcdir2, "bar.c")
+        self.assertEqual("hg:example.com/repo:foo.c:abcd1234",
+                         symbolstore.GetVCSFilename(filename1, [srcdir1, srcdir2])[0])
+        self.assertEqual("hg:example.com/other:bar.c:0987ffff",
+                         symbolstore.GetVCSFilename(filename2, [srcdir1, srcdir2])[0])
+
+    def testVCSFilenameEnv(self):
+        # repo URL and changeset read from environment variables if defined.
+        os.environ['MOZ_SOURCE_REPO'] = 'https://somewhere.com/repo'
+        os.environ['MOZ_SOURCE_CHANGESET'] = 'abcdef0123456'
+        os.mkdir(os.path.join(self.test_dir, '.hg'))
+        filename = os.path.join(self.test_dir, 'foo.c')
+        self.assertEqual('hg:somewhere.com/repo:foo.c:abcdef0123456',
+                         symbolstore.GetVCSFilename(filename, [self.test_dir])[0])
+
+
+class TestRepoManifest(HelperMixin, unittest.TestCase):
+    def testRepoManifest(self):
+        manifest = os.path.join(self.test_dir, "sources.xml")
+        open(manifest, "w").write("""<?xml version="1.0" encoding="UTF-8"?>
+<manifest>
+<remote fetch="http://example.com/foo/" name="foo"/>
+<remote fetch="git://example.com/bar/" name="bar"/>
+<default remote="bar"/>
+<project name="projects/one" revision="abcd1234"/>
+<project name="projects/two" path="projects/another" revision="ffffffff" remote="foo"/>
+<project name="something_else" revision="00000000" remote="bar"/>
+</manifest>
+""")
+        # Use a source file from each of the three projects
+        file1 = os.path.join(self.test_dir, "projects", "one", "src1.c")
+        file2 = os.path.join(self.test_dir, "projects", "another", "src2.c")
+        file3 = os.path.join(self.test_dir, "something_else", "src3.c")
+        d = symbolstore.Dumper("dump_syms", "symbol_path",
+                               repo_manifest=manifest)
+        self.assertEqual("git:example.com/bar/projects/one:src1.c:abcd1234",
+                         symbolstore.GetVCSFilename(file1, d.srcdirs)[0])
+        self.assertEqual("git:example.com/foo/projects/two:src2.c:ffffffff",
+                         symbolstore.GetVCSFilename(file2, d.srcdirs)[0])
+        self.assertEqual("git:example.com/bar/something_else:src3.c:00000000",
+                         symbolstore.GetVCSFilename(file3, d.srcdirs)[0])
+
+if platform.system() in ("Windows", "Microsoft"):
+    class TestFixFilenameCase(HelperMixin, unittest.TestCase):
+        def test_fix_filename_case(self):
+            # self.test_dir is going to be 8.3 paths...
+            junk = os.path.join(self.test_dir, 'x')
+            with open(junk, 'wb') as o:
+                o.write('x')
+            d = symbolstore.Dumper_Win32(dump_syms='dump_syms',
+                                         symbol_path=self.test_dir)
+            fixed_dir = os.path.dirname(d.FixFilenameCase(junk))
+            files = [
+                'one\\two.c',
+                'three\\Four.d',
+                'Five\\Six.e',
+                'seven\\Eight\\nine.F',
+            ]
+            for rel_path in files:
+                full_path = os.path.normpath(os.path.join(self.test_dir,
+                                                          rel_path))
+                self.make_dirs(full_path)
+                with open(full_path, 'wb') as o:
+                    o.write('x')
+                fixed_path = d.FixFilenameCase(full_path.lower())
+                fixed_path = os.path.relpath(fixed_path, fixed_dir)
+                self.assertEqual(rel_path, fixed_path)
+
+    class TestSourceServer(HelperMixin, unittest.TestCase):
+        @patch("subprocess.call")
+        @patch("subprocess.Popen")
+        def test_HGSERVER(self, mock_Popen, mock_call):
+            """
+            Test that HGSERVER gets set correctly in the source server index.
+            """
+            symbolpath = os.path.join(self.test_dir, "symbols")
+            os.makedirs(symbolpath)
+            srcdir = os.path.join(self.test_dir, "srcdir")
+            os.makedirs(os.path.join(srcdir, ".hg"))
+            sourcefile = os.path.join(srcdir, "foo.c")
+            test_files = add_extension(["foo"])
+            self.add_test_files(test_files)
+            # srcsrv needs PDBSTR_PATH set
+            os.environ["PDBSTR_PATH"] = "pdbstr"
+            # mock calls to `dump_syms`, `hg parent` and
+            # `hg showconfig paths.default`
+            mock_Popen.return_value.stdout = iter([
+                    "MODULE os x86 %s %s" % ("X" * 33, test_files[0]),
+                    "FILE 0 %s" % sourcefile,
+                    "PUBLIC xyz 123"
+                    ])
+            mock_communicate = mock_Popen.return_value.communicate
+            mock_communicate.side_effect = [("abcd1234", ""),
+                                            ("http://example.com/repo", ""),
+                                            ]
+            # And mock the call to pdbstr to capture the srcsrv stream data.
+            global srcsrv_stream
+            srcsrv_stream = None
+            def mock_pdbstr(args, cwd="", **kwargs):
+                for arg in args:
+                    if arg.startswith("-i:"):
+                        global srcsrv_stream
+                        srcsrv_stream = open(os.path.join(cwd, arg[3:]), 'r').read()
+                return 0
+            mock_call.side_effect = mock_pdbstr
+            d = symbolstore.GetPlatformSpecificDumper(dump_syms="dump_syms",
+                                                      symbol_path=symbolpath,
+                                                      srcdirs=[srcdir],
+                                                      vcsinfo=True,
+                                                      srcsrv=True,
+                                                      copy_debug=True)
+            # stub out CopyDebug
+            d.CopyDebug = lambda *args: True
+            d.Process(self.test_dir)
+            d.Finish(stop_pool=False)
+            self.assertNotEqual(srcsrv_stream, None)
+            hgserver = [x.rstrip() for x in srcsrv_stream.splitlines() if x.startswith("HGSERVER=")]
+            self.assertEqual(len(hgserver), 1)
+            self.assertEqual(hgserver[0].split("=")[1], "http://example.com/repo")
+
+class TestInstallManifest(HelperMixin, unittest.TestCase):
+    def setUp(self):
+        HelperMixin.setUp(self)
+        self.srcdir = os.path.join(self.test_dir, 'src')
+        os.mkdir(self.srcdir)
+        self.objdir = os.path.join(self.test_dir, 'obj')
+        os.mkdir(self.objdir)
+        self.manifest = InstallManifest()
+        self.canonical_mapping = {}
+        for s in ['src1', 'src2']:
+            srcfile = os.path.join(self.srcdir, s)
+            objfile = os.path.join(self.objdir, s)
+            self.canonical_mapping[objfile] = srcfile
+            self.manifest.add_copy(srcfile, s)
+        self.manifest_file = os.path.join(self.test_dir, 'install-manifest')
+        self.manifest.write(self.manifest_file)
+
+    def testMakeFileMapping(self):
+        '''
+        Test that valid arguments are validated.
+        '''
+        arg = '%s,%s' % (self.manifest_file, self.objdir)
+        ret = symbolstore.validate_install_manifests([arg])
+        self.assertEqual(len(ret), 1)
+        manifest, dest = ret[0]
+        self.assertTrue(isinstance(manifest, InstallManifest))
+        self.assertEqual(dest, self.objdir)
+
+        file_mapping = symbolstore.make_file_mapping(ret)
+        for obj, src in self.canonical_mapping.iteritems():
+            self.assertTrue(obj in file_mapping)
+            self.assertEqual(file_mapping[obj], src)
+
+    def testMissingFiles(self):
+        '''
+        Test that missing manifest files or install directories give errors.
+        '''
+        missing_manifest = os.path.join(self.test_dir, 'missing-manifest')
+        arg = '%s,%s' % (missing_manifest, self.objdir)
+        with self.assertRaises(IOError) as e:
+            symbolstore.validate_install_manifests([arg])
+            self.assertEqual(e.filename, missing_manifest)
+
+        missing_install_dir = os.path.join(self.test_dir, 'missing-dir')
+        arg = '%s,%s' % (self.manifest_file, missing_install_dir)
+        with self.assertRaises(IOError) as e:
+            symbolstore.validate_install_manifests([arg])
+            self.assertEqual(e.filename, missing_install_dir)
+
+    def testBadManifest(self):
+        '''
+        Test that a bad manifest file give errors.
+        '''
+        bad_manifest = os.path.join(self.test_dir, 'bad-manifest')
+        with open(bad_manifest, 'wb') as f:
+            f.write('junk\n')
+        arg = '%s,%s' % (bad_manifest, self.objdir)
+        with self.assertRaises(IOError) as e:
+            symbolstore.validate_install_manifests([arg])
+            self.assertEqual(e.filename, bad_manifest)
+
+    def testBadArgument(self):
+        '''
+        Test that a bad manifest argument gives an error.
+        '''
+        with self.assertRaises(ValueError) as e:
+            symbolstore.validate_install_manifests(['foo'])
+
+class TestFileMapping(HelperMixin, unittest.TestCase):
+    def setUp(self):
+        HelperMixin.setUp(self)
+        self.srcdir = os.path.join(self.test_dir, 'src')
+        os.mkdir(self.srcdir)
+        self.objdir = os.path.join(self.test_dir, 'obj')
+        os.mkdir(self.objdir)
+        self.symboldir = os.path.join(self.test_dir, 'symbols')
+        os.mkdir(self.symboldir)
+
+    @patch("subprocess.Popen")
+    def testFileMapping(self, mock_Popen):
+        files = [('a/b', 'mozilla/b'),
+                 ('c/d', 'foo/d')]
+        if os.sep != '/':
+            files = [[f.replace('/', os.sep) for f in x] for x in files]
+        file_mapping = {}
+        dumped_files = []
+        expected_files = []
+        for s, o in files:
+            srcfile = os.path.join(self.srcdir, s)
+            expected_files.append(srcfile)
+            file_mapping[os.path.join(self.objdir, o)] = srcfile
+            dumped_files.append(os.path.join(self.objdir, 'x', 'y',
+                                             '..', '..', o))
+        # mock the dump_syms output
+        file_id = ("X" * 33, 'somefile')
+        def mk_output(files):
+            return iter(
+                [
+                    'MODULE os x86 %s %s\n' % file_id
+                ] +
+                [
+                    'FILE %d %s\n' % (i,s) for i, s in enumerate(files)
+                ] +
+                [
+                    'PUBLIC xyz 123\n'
+                ]
+            )
+        mock_Popen.return_value.stdout = mk_output(dumped_files)
+
+        d = symbolstore.Dumper('dump_syms', self.symboldir,
+                               file_mapping=file_mapping)
+        f = os.path.join(self.objdir, 'somefile')
+        open(f, 'wb').write('blah')
+        d.Process(f)
+        d.Finish(stop_pool=False)
+        expected_output = ''.join(mk_output(expected_files))
+        symbol_file = os.path.join(self.symboldir,
+                                   file_id[1], file_id[0], file_id[1] + '.sym')
+        self.assertEqual(open(symbol_file, 'r').read(), expected_output)
+
+class TestFunctional(HelperMixin, unittest.TestCase):
+    '''Functional tests of symbolstore.py, calling it with a real
+    dump_syms binary and passing in a real binary to dump symbols from.
+
+    Since the rest of the tests in this file mock almost everything and
+    don't use the actual process pool like buildsymbols does, this tests
+    that the way symbolstore.py gets called in buildsymbols works.
+    '''
+    def setUp(self):
+        HelperMixin.setUp(self)
+        import buildconfig
+        self.skip_test = False
+        if buildconfig.substs['MOZ_BUILD_APP'] != 'browser':
+            self.skip_test = True
+        self.topsrcdir = buildconfig.topsrcdir
+        self.script_path = os.path.join(self.topsrcdir, 'toolkit',
+                                        'crashreporter', 'tools',
+                                        'symbolstore.py')
+        if platform.system() in ("Windows", "Microsoft"):
+            if buildconfig.substs['MSVC_HAS_DIA_SDK']:
+                self.dump_syms = os.path.join(buildconfig.topobjdir,
+                                              'dist', 'host', 'bin',
+                                              'dump_syms.exe')
+            else:
+                self.dump_syms = os.path.join(self.topsrcdir,
+                                              'toolkit',
+                                              'crashreporter',
+                                              'tools',
+                                              'win32',
+                                              'dump_syms_vc{_MSC_VER}.exe'.format(**buildconfig.substs))
+            self.target_bin = os.path.join(buildconfig.topobjdir,
+                                           'browser',
+                                           'app',
+                                           'firefox.pdb')
+        else:
+            self.dump_syms = os.path.join(buildconfig.topobjdir,
+                                          'dist', 'host', 'bin',
+                                          'dump_syms')
+            self.target_bin = os.path.join(buildconfig.topobjdir,
+                                           'dist', 'bin', 'firefox')
+
+
+    def tearDown(self):
+        HelperMixin.tearDown(self)
+
+    def testSymbolstore(self):
+        if self.skip_test:
+            raise unittest.SkipTest('Skipping test in non-Firefox product')
+        output = subprocess.check_output([sys.executable,
+                                          self.script_path,
+                                          '--vcs-info',
+                                          '-s', self.topsrcdir,
+                                          self.dump_syms,
+                                          self.test_dir,
+                                          self.target_bin],
+                                         stderr=open(os.devnull, 'w'))
+        lines = filter(lambda x: x.strip(), output.splitlines())
+        self.assertEqual(1, len(lines),
+                         'should have one filename in the output')
+        symbol_file = os.path.join(self.test_dir, lines[0])
+        self.assertTrue(os.path.isfile(symbol_file))
+        symlines = open(symbol_file, 'r').readlines()
+        file_lines = filter(lambda x: x.startswith('FILE') and 'nsBrowserApp.cpp' in x, symlines)
+        self.assertEqual(len(file_lines), 1,
+                         'should have nsBrowserApp.cpp FILE line')
+        filename = file_lines[0].split(None, 2)[2]
+        self.assertEqual('hg:', filename[:3])
+
+
+if __name__ == '__main__':
+    # use ThreadPoolExecutor to use threading instead of processes so
+    # that our mocking/module-patching works.
+    symbolstore.Dumper.GlobalInit(concurrent.futures.ThreadPoolExecutor)
+
+    mozunit.main()
+