dosep.py: Add ability to set default test timout based on target

[labath]

Summary

Current default is 10 minutes, which causes the test suite to run very long in
case of test timeouts. On linux, each test completes in under 90 seconds in the
slowest configuration (debug build of lldb, using debug clang to build
inferiors). So a default timeout of 4 minutes should suffice. If it turns out
to be not enough, we can fiddle with the number a bit.

[sivachandra]

I have no objections.

[vharron]

Do remote tests pass in this time range? If not, maybe you should change
it to use 10 minutes for remote targets.

[labath]

The time for the remote tests is heavily influenced by network latency. If the machines are close to each other, I believe the tests will pass (but I can't test it right now). For trans-oceanic tests, even 10m will not be enough...

[labath]

I've set the default to 4m for local and 10m for remote targets.

lldb/trunk/test/dosep.py

try:
         subprocess.call("gtimeout", stderr=subprocess.PIPE)
         return "gtimeout"
     except OSError:
         pass
     return None
 
 timeout_command = get_timeout_command()
 
-default_timeout = os.getenv("LLDB_TEST_TIMEOUT") or "10m"
-
 # Status codes for running command with timeout.
 eTimedOut, ePassed, eFailed = 124, 0, 1
 
 output_lock = None
 test_counter = None
 total_tests = None
 
 def setup_lock_and_counter(lock, counter, total):
elif target.startswith("freebsd"):
             "TestWatchpointConditionAPI.py",
         }
     elif target.startswith("darwin"):
         expected_timeout |= {
             "TestThreadSpecificBreakpoint.py", # times out on MBP Retina, Mid 2012
         }
     return expected_timeout
 
+def getDefaultTimeout(platform_name):
+    if os.getenv("LLDB_TEST_TIMEOUT"):
+        return os.getenv("LLDB_TEST_TIMEOUT")
+
+    if platform_name is None:
+        platform_name = sys.platform
+
+    if platform_name.startswith("remote-"):
+        return "10m"
+    else:
+        return "4m"
+
+
 def touch(fname, times=None):
     with open(fname, 'a'):
         os.utime(fname, times)
 
 def find(pattern, path):
     result = []
     for root, dirs, files in os.walk(path):
         for name in files:
else:
         num_threads_str = os.environ.get("LLDB_TEST_THREADS")
         if num_threads_str:
             num_threads = int(num_threads_str)
         else:
             num_threads = multiprocessing.cpu_count()
     if num_threads < 1:
         num_threads = 1
 
+    global default_timeout
+    default_timeout = getDefaultTimeout(dotest_options.lldb_platform_name)
+
     system_info = " ".join(platform.uname())
     (timed_out, failed, passed, all_fails, all_passes) = walk_and_invoke(test_directory, test_subdir, dotest_argv, num_threads)
 
     timed_out = set(timed_out)
     num_test_files = len(failed) + len(passed)
     num_tests = all_fails + all_passes
 
     # move core files into session dir