From 2ae37c15c3fdd202deef5fa3b2fd0da4ecc6c7d8 Mon Sep 17 00:00:00 2001
From: Reid Kleckner <rnk@google.com>
Date: Wed, 5 Apr 2017 18:56:48 +0000
Subject: [PATCH] [lit] Fix Analysis test format pickling error

Move the test format into a standalone .py file and add it to the site
module search path. This allows us to run the test on Windows, and it
makes it compatible with the multiprocessing.Pool lit test execution
strategy.

I think this test was only passing everywhere else because
multiprocessing uses 'fork' to spawn workers, so the test format never
needs to be pickled.

llvm-svn: 299577
---
 clang/test/Analysis/analyzer_test.py | 28 +++++++++++++++++++++
 clang/test/Analysis/lit.local.cfg    | 37 ++++++----------------------
 2 files changed, 36 insertions(+), 29 deletions(-)
 create mode 100644 clang/test/Analysis/analyzer_test.py

diff --git a/clang/test/Analysis/analyzer_test.py b/clang/test/Analysis/analyzer_test.py
new file mode 100644
index 000000000000..58df11a4ba47
--- /dev/null
+++ b/clang/test/Analysis/analyzer_test.py
@@ -0,0 +1,28 @@
+import lit.formats
+import lit.TestRunner
+
+# Custom format class for static analyzer tests
+class AnalyzerTest(lit.formats.ShTest):
+
+    def execute(self, test, litConfig):
+        result = self.executeWithAnalyzeSubstitution(
+            test, litConfig, '-analyzer-constraints=range')
+
+        if result.code == lit.Test.FAIL:
+            return result
+
+        # If z3 backend available, add an additional run line for it
+        if test.config.clang_staticanalyzer_z3 == '1':
+            result = self.executeWithAnalyzeSubstitution(
+                test, litConfig, '-analyzer-constraints=z3 -DANALYZER_CM_Z3')
+
+        return result
+
+    def executeWithAnalyzeSubstitution(self, test, litConfig, substitution):
+        saved_substitutions = list(test.config.substitutions)
+        test.config.substitutions.append(('%analyze', substitution))
+        result = lit.TestRunner.executeShTest(test, litConfig,
+                                              self.execute_external)
+        test.config.substitutions = saved_substitutions
+
+        return result
diff --git a/clang/test/Analysis/lit.local.cfg b/clang/test/Analysis/lit.local.cfg
index 563d4188ab3f..a594c5dada58 100644
--- a/clang/test/Analysis/lit.local.cfg
+++ b/clang/test/Analysis/lit.local.cfg
@@ -1,34 +1,13 @@
-import lit.TestRunner
-import sys
+# -*- Python -*- vim: set ft=python ts=4 sw=4 expandtab tw=79:
 
-# Custom format class for static analyzer tests
-class AnalyzerTest(lit.formats.ShTest, object):
+import site
 
-    def execute(self, test, litConfig):
-        result = self.executeWithAnalyzeSubstitution(test, litConfig, '-analyzer-constraints=range')
-
-        if result.code == lit.Test.FAIL:
-            return result
-
-        # If z3 backend available, add an additional run line for it
-        if test.config.clang_staticanalyzer_z3 == '1':
-            result = self.executeWithAnalyzeSubstitution(test, litConfig, '-analyzer-constraints=z3 -DANALYZER_CM_Z3')
-
-        return result
-
-    def executeWithAnalyzeSubstitution(self, test, litConfig, substitution):
-        saved_substitutions = list(test.config.substitutions)
-        test.config.substitutions.append(('%analyze', substitution))
-        result = lit.TestRunner.executeShTest(test, litConfig, self.execute_external)
-        test.config.substitutions = saved_substitutions
-
-        return result
-
-# This results in a pickling-related failure on Windows
-if (not sys.platform in ['win32']):
-    config.test_format = AnalyzerTest(config.test_format.execute_external)
-else:
-    config.substitutions.append(('%analyze', '-analyzer-constraints=range'))
+# Load the custom analyzer test format, which runs the test again with Z3 if it
+# is available.
+site.addsitedir(os.path.dirname(__file__))
+import analyzer_test
+config.test_format = analyzer_test.AnalyzerTest(
+        config.test_format.execute_external)
 
 if not config.root.clang_staticanalyzer:
     config.unsupported = True