Mark unstable tests as Unsupported on ARM

This is half the patch from: http://reviews.llvm.org/D3857

It lets us get deterministic results from the rest of the test suite.

llvm-svn: 209861

compiler-rt/test/asan/TestCases/Linux/uar_signals.cc

@@ -1,6 +1,7 @@
 // This test checks that the implementation of use-after-return
 // is async-signal-safe.
 // RUN: %clangxx_asan -O1 %s -o %t -pthread && %run %t
+// REQUIRES: stable-runtime
 #include <signal.h>
 #include <stdlib.h>
 #include <stdio.h>

compiler-rt/test/asan/TestCases/current_allocated_bytes.cc

@@ -1,5 +1,6 @@
 // RUN: %clangxx_asan -O0 %s -pthread -o %t && %run %t
 // RUN: %clangxx_asan -O2 %s -pthread -o %t && %run %t
+// REQUIRES: stable-runtime
 
 #include <assert.h>
 #include <pthread.h>

compiler-rt/test/asan/TestCases/deep_thread_stack.cc

@@ -2,6 +2,7 @@
 // RUN: %clangxx_asan -O1 %s -pthread -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O2 %s -pthread -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O3 %s -pthread -o %t && not %run %t 2>&1 | FileCheck %s
+// REQUIRES: stable-runtime
 
 #include <pthread.h>
 

compiler-rt/test/asan/lit.cfg

@@ -109,6 +109,11 @@ config.substitutions.append( ('CHECK-%kernel_bits', ("CHECK-kernel-" + kernel_bi
 
 config.available_features.add("asan-" + config.bits + "-bits")
 
+# Allow tests to use REQUIRES=stable-runtime.  For use when you cannot use XFAIL
+# because the test hangs.
+if config.target_arch != 'arm':
+  config.available_features.add('stable-runtime')
+
 # Turn on leak detection on 64-bit Linux.
 if config.host_os == 'Linux' and config.bits == '64':
   config.environment['ASAN_OPTIONS'] = 'detect_leaks=1'