1 files changed, 87 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/lang/objc/print-obj/TestPrintObj.py b/packages/Python/lldbsuite/test/lang/objc/print-obj/TestPrintObj.py
new file mode 100644
index 000000000000..5c52cc0e0697
--- /dev/null
+++ b/packages/Python/lldbsuite/test/lang/objc/print-obj/TestPrintObj.py
@@ -0,0 +1,87 @@
+"""
+Test "print object" where another thread blocks the print object from making progress.
+"""
+
+from __future__ import print_function
+
+
+
+import os, time
+import lldb
+from lldbsuite.test.lldbtest import *
+
+@skipUnlessDarwin
+class PrintObjTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # My source program.
+        self.source = "blocked.m"
+        # Find the line numbers to break at.
+        self.line = line_number(self.source, '// Set a breakpoint here.')
+
+    def test_print_obj(self):
+        """
+        Test "print object" where another thread blocks the print object from making progress.
+
+        Set a breakpoint on the line in my_pthread_routine.  Then switch threads
+        to the main thread, and do print the lock_me object.  Since that will
+        try to get the lock already gotten by my_pthread_routime thread, it will
+        have to switch to running all threads, and that should then succeed.
+        """
+        d = {'EXE': 'b.out'}
+        self.build(dictionary=d)
+        self.setTearDownCleanup(dictionary=d)
+        exe = os.path.join(os.getcwd(), 'b.out')
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
+        self.assertTrue(breakpoint, VALID_BREAKPOINT)
+        self.runCmd("breakpoint list")
+
+        # Launch the process, and do not stop at the entry point.
+        process = target.LaunchSimple (None, None, self.get_process_working_directory())
+
+        self.runCmd("thread backtrace all")
+
+        # Let's get the current stopped thread.  We'd like to switch to the
+        # other thread to issue our 'po lock_me' command.
+        import lldbsuite.test.lldbutil as lldbutil
+        this_thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
+        self.assertTrue(this_thread)
+
+        # Find the other thread.  The iteration protocol of SBProcess and the
+        # rich comparison methods (__eq__/__ne__) of SBThread come in handy.
+        other_thread = None
+        for t in process:
+            if t != this_thread:
+                other_thread = t
+                break
+
+        # Set the other thread as the selected thread to issue our 'po' command.other
+        self.assertTrue(other_thread)
+        process.SetSelectedThread(other_thread)
+        if self.TraceOn():
+            print("selected thread:" + lldbutil.get_description(other_thread))
+        self.runCmd("thread backtrace")
+
+        # We want to traverse the frame to the one corresponding to blocked.m to
+        # issue our 'po lock_me' command.
+
+        depth = other_thread.GetNumFrames()
+        for i in range(depth):
+            frame = other_thread.GetFrameAtIndex(i)
+            name = frame.GetFunctionName()
+            if name == 'main':
+                other_thread.SetSelectedFrame(i)
+                if self.TraceOn():
+                    print("selected frame:" + lldbutil.get_description(frame))
+                break
+
+        self.expect("po lock_me", OBJECT_PRINTED_CORRECTLY,
+            substrs = ['I am pretty special.'])