Add TestThreadAPI.py file to house the Python SBThread API test cases.

Currently it has only test cases for SBThread.GetStopDescription() API.

Also modified lldb.swig to add typemap for (char *dst, size_t dst_len)
which occurs for SBThread::GetStopDescription() C++ API.  For Python
scripting:

    # Due to the typemap magic (see lldb.swig), we pass in an (int)length to GetStopDescription
    # and expect to get a Python string as the result object!
    # The 100 is just an arbitrary number specifying the buffer size.
    stop_description = thread.GetStopDescription(100)

llvm-svn: 127173

lldb/test/python_api/thread/TestThreadAPI.py

@@ -0,0 +1,66 @@
+"""
+Test SBThread APIs.
+"""
+
+import os, time
+import unittest2
+import lldb
+from lldbutil import get_stopped_thread
+from lldbtest import *
+
+class ThreadAPITestCase(TestBase):
+
+    mydir = os.path.join("python_api", "thread")
+
+    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @python_api_test
+    def test_get_stop_description_with_dsym(self):
+        """Test Python SBThread.GetStopDescription() API."""
+        self.buildDsym()
+        self.get_stop_description()
+
+    @python_api_test
+    def test_get_stop_description_with_dwarf(self):
+        """Test Python SBThread.GetStopDescription() API."""
+        self.buildDwarf()
+        self.get_stop_description()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break inside main().
+        self.line = line_number("main.cpp", "// Set break point at this line and check variable 'my_char'.")
+
+    def get_stop_description(self):
+        """Test Python SBProcess.ReadMemory() API."""
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target.IsValid(), VALID_TARGET)
+
+        breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line)
+        self.assertTrue(breakpoint.IsValid(), VALID_BREAKPOINT)
+        #self.runCmd("breakpoint list")
+
+        # Launch the process, and do not stop at the entry point.
+        error = lldb.SBError()
+        self.process = target.Launch (self.dbg.GetListener(), None, None, os.ctermid(), os.ctermid(), os.ctermid(), None, 0, False, error)
+
+        thread = get_stopped_thread(self.process, lldb.eStopReasonBreakpoint)
+        self.assertTrue(thread != None, "There should be a thread stopped due to breakpoint")
+        #self.runCmd("process status")
+
+        # Due to the typemap magic (see lldb.swig), we pass in an (int)length to GetStopDescription
+        # and expect to get a Python string as the result object!
+        # The 100 is just an arbitrary number specifying the buffer size.
+        stop_description = thread.GetStopDescription(100)
+        self.expect(stop_description, exe=False,
+            startstr = 'breakpoint')
+
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()