1 files changed, 104 insertions, 0 deletions
diff --git a/lldb/packages/Python/lldbsuite/test/commands/expression/call-throws/TestCallThatThrows.py b/lldb/packages/Python/lldbsuite/test/commands/expression/call-throws/TestCallThatThrows.py
new file mode 100644
index 00000000000..c6b90ba5ba0
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/commands/expression/call-throws/TestCallThatThrows.py
@@ -0,0 +1,104 @@
+"""
+Test calling a function that throws an ObjC exception, make sure that it doesn't propagate the exception.
+"""
+
+from __future__ import print_function
+
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class ExprCommandWithThrowTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+
+        self.main_source = "call-throws.m"
+        self.main_source_spec = lldb.SBFileSpec(self.main_source)
+
+    @skipUnlessDarwin
+    def test(self):
+        """Test calling a function that throws and ObjC exception."""
+        self.build()
+        self.call_function()
+
+    def check_after_call(self):
+        # Check that we are back where we were before:
+        frame = self.thread.GetFrameAtIndex(0)
+        self.assertTrue(
+            self.orig_frame_pc == frame.GetPC(),
+            "Restored the zeroth frame correctly")
+
+    def call_function(self):
+        """Test calling function that throws."""
+        (target, process, self.thread, bkpt) = lldbutil.run_to_source_breakpoint(self,
+                                   'I am about to throw.', self.main_source_spec)
+
+        options = lldb.SBExpressionOptions()
+        options.SetUnwindOnError(True)
+
+        frame = self.thread.GetFrameAtIndex(0)
+        # Store away the PC to check that the functions unwind to the right
+        # place after calls
+        self.orig_frame_pc = frame.GetPC()
+
+        value = frame.EvaluateExpression("[my_class callMeIThrow]", options)
+        self.assertTrue(value.IsValid())
+        self.assertTrue(value.GetError().Success() == False)
+
+        self.check_after_call()
+
+        # Okay, now try with a breakpoint in the called code in the case where
+        # we are ignoring breakpoint hits.
+        handler_bkpt = target.BreakpointCreateBySourceRegex(
+            "I felt like it", self.main_source_spec)
+        self.assertTrue(handler_bkpt.GetNumLocations() > 0)
+        options.SetIgnoreBreakpoints(True)
+        options.SetUnwindOnError(True)
+
+        value = frame.EvaluateExpression("[my_class callMeIThrow]", options)
+
+        self.assertTrue(
+            value.IsValid() and value.GetError().Success() == False)
+        self.check_after_call()
+
+        # Now set the ObjC language breakpoint and make sure that doesn't
+        # interfere with the call:
+        exception_bkpt = target.BreakpointCreateForException(
+            lldb.eLanguageTypeObjC, False, True)
+        self.assertTrue(exception_bkpt.GetNumLocations() > 0)
+
+        options.SetIgnoreBreakpoints(True)
+        options.SetUnwindOnError(True)
+
+        value = frame.EvaluateExpression("[my_class callMeIThrow]", options)
+
+        self.assertTrue(
+            value.IsValid() and value.GetError().Success() == False)
+        self.check_after_call()
+
+        # Now turn off exception trapping, and call a function that catches the exceptions,
+        # and make sure the function actually completes, and we get the right
+        # value:
+        options.SetTrapExceptions(False)
+        value = frame.EvaluateExpression("[my_class iCatchMyself]", options)
+        self.assertTrue(value.IsValid())
+        self.assertTrue(value.GetError().Success())
+        self.assertTrue(value.GetValueAsUnsigned() == 57)
+        self.check_after_call()
+        options.SetTrapExceptions(True)
+
+        # Now set this unwind on error to false, and make sure that we stop
+        # where the exception was thrown
+        options.SetUnwindOnError(False)
+        value = frame.EvaluateExpression("[my_class callMeIThrow]", options)
+
+        self.assertTrue(
+            value.IsValid() and value.GetError().Success() == False)
+        self.check_after_call()