[test] Fix win-asan symbolizer path

This makes the symbolizer path relative, as the absolute paths contain
a drive letter + colon on windows. The colon is confused by the
sanitizer as an option separator.

The test driver changes the cwd to the V8 root dir in each
invocation.

Bug: chromium:726584
Change-Id: Icf4e5a55bba5dec8e59a3dfe3eccdf7224e65c33
Reviewed-on: https://chromium-review.googlesource.com/721124Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48652}

tools/testrunner/local/testsuite.py

@@ -326,8 +326,9 @@ class GoogleTestSuite(TestSuite):
       output = commands.Execute(cmd)
       if output.exit_code == 0:
         break
-      print "Test executable failed to list the tests (try %d).\n\nStdout:" % i
+      print "Test executable failed to list the tests (try %d).\n\nCmd:" % i
       print ' '.join(cmd)
+      print "\nStdout:"
       print output.stdout
       print "\nStderr:"
       print output.stderr

tools/testrunner/standard_runner.py

@@ -389,16 +389,18 @@ class StandardTestRunner(base_runner.BaseTestRunner):
       # Many tests assume an English interface.
       os.environ['LANG'] = 'en_US.UTF-8'
 
-      symbolizer = 'external_symbolizer_path=%s' % (
-          os.path.join(
-              base_runner.BASE_DIR,
-              'third_party',
-              'llvm-build',
-              'Release+Asserts',
-              'bin',
-              'llvm-symbolizer',
-          )
+      external_symbolizer_path = os.path.join(
+          base_runner.BASE_DIR,
+          'third_party',
+          'llvm-build',
+          'Release+Asserts',
+          'bin',
+          'llvm-symbolizer',
       )
+      if utils.IsWindows():
+        # Quote, because sanitizers might confuse colon as option separator.
+        external_symbolizer_path = '"%s.exe"' % external_symbolizer_path
+      symbolizer = 'external_symbolizer_path=%s' % external_symbolizer_path
 
       if options.asan:
         asan_options = [symbolizer, "allow_user_segv_handler=1"]