lit: Support RunSafely remote execution

[MatzeB]

As discussed in D14678 I will go for post-commit review as cmake/lit in the test-suite is still in early development.

[MatzeB]

This landed in r254545

CMakeLists.txt

if( CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR AND NOT MSVC_IDE )
   message(FATAL_ERROR "In-source builds are not allowed.
 CMake would overwrite the makefiles distributed with LLVM.
 Please create a directory and run cmake from there, passing the path
 to this source directory as the last argument.
 This process created the file `CMakeCache.txt' and the directory `CMakeFiles'.
 Please delete them.")
 endif()
 
+# Remote configuration (will be set in lit.site.cfg)
+set(TEST_SUITE_REMOTE_CLIENT "ssh" CACHE STRING "Remote execution client")
+set(TEST_SUITE_REMOTE_HOST "" CACHE STRING "Remote execution host")
+set(TEST_SUITE_REMOTE_USER "" CACHE STRING "Remote execution user")
+set(TEST_SUITE_REMOTE_PORT "" CACHE STRING "Remote execution port")
+mark_as_advanced(TEST_SUITE_REMOTE_USER TEST_SUITE_REMOTE_PORT)
+
 include(MakefileFunctions)
 include(SingleMultiSource)
 find_package(YACC)
 find_package(TCL)
 
 if(NOT DEFINED TARGET_OS)
   message(STATUS "Check target operating system - ${CMAKE_SYSTEM_NAME}")
   set(TARGET_OS ${CMAKE_SYSTEM_NAME})

lit.cfg

for i in range(len(tokens)):
             del tokens[i]
             break
 
     if stdin is None:
         stdin = "/dev/null"
     if stdout is not None or stderr is not None:
         raise Exception("stdout/stderr redirection in combination with RunSafely not implemented yet")
 
-    timeit = "%s/tools/timeit" % config.test_source_root
     runsafely = "%s/RunSafely.sh" % config.test_suite_root
+    runsafely_prefix = [ runsafely ]
+    if config.remote_host:
+        runsafely_prefix += [ "-r", config.remote_host ]
+        if config.remote_user:
+            runsafely_prefix += [ "-l", config.remote_user ]
+        if config.remote_client:
+            runsafely_prefix += [ "-rc", config.remote_client ]
+        if config.remote_port:
+            runsafely_prefix += [ "-rp", config.remote_port ]
+    timeit = "%s/tools/timeit-target" % config.test_source_root
     timeout = "7200"
-    runsafely_prefix = [runsafely, "-t", timeit, timeout, stdin, outfile]
+    runsafely_prefix += [ "-t", timeit, timeout, stdin, outfile ]
 
     new_commandline = " ".join(map(quote, runsafely_prefix + tokens))
     return new_commandline
 
 class TestSuiteTest(FileBasedTest):
     def __init__(self):
         super(TestSuiteTest, self).__init__()
         
def execute(self, test, litConfig):
             pass
 
         return result
 
 config.name = 'test-suite'
 config.test_format = TestSuiteTest()
 config.suffixes = ['.test']
 config.excludes = ['ABI-Testsuite']
+if 'SSH_AUTH_SOCK' in os.environ:
+    config.environment['SSH_AUTH_SOCK'] = os.environ['SSH_AUTH_SOCK']

lit.site.cfg.in

 import sys
 
 config.test_source_root = "@CMAKE_BINARY_DIR@"
 config.test_suite_root = "@CMAKE_SOURCE_DIR@"
+config.remote_client = "@TEST_SUITE_REMOTE_CLIENT@"
+config.remote_host = "@TEST_SUITE_REMOTE_HOST@"
+config.remote_user = "@TEST_SUITE_REMOTE_USER@"
+config.remote_port = "@TEST_SUITE_REMOTE_PORT@"
 
 lit_config.load_config(config, "@CMAKE_SOURCE_DIR@/lit.cfg")