1 files changed, 57 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py b/packages/Python/lldbsuite/test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py
new file mode 100644
index 000000000000..a54b45822a6a
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py
@@ -0,0 +1,57 @@
+"""
+Test that expr will time out and allow other threads to run if it blocks.
+"""
+
+from __future__ import print_function
+
+
+
+import os, time
+import re
+import lldb
+import lldbsuite.test.lldbutil as lldbutil
+from lldbsuite.test.lldbtest import *
+
+class ExprDoesntDeadlockTestCase(TestBase):
+
+    def getCategories(self):
+        return ['basic_process']
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @expectedFailureFreeBSD('llvm.org/pr17946')
+    @expectedFlakeyLinux # failed 1/365 test runs, line 61, thread.IsValid()
+    @expectedFailureWindows # Windows doesn't have pthreads, need to port this test.
+    def test_with_run_command(self):
+        """Test that expr will time out and allow other threads to run if it blocks."""
+        self.build()
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        # Create a target by the debugger.
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        # Now create a breakpoint at source line before call_me_to_get_lock gets called.
+
+        main_file_spec = lldb.SBFileSpec ("locking.c")
+        breakpoint = target.BreakpointCreateBySourceRegex('Break here', main_file_spec)
+        if self.TraceOn():
+            print("breakpoint:", breakpoint)
+        self.assertTrue(breakpoint and
+                        breakpoint.GetNumLocations() == 1,
+                        VALID_BREAKPOINT)
+
+        # Now launch the process, and do not stop at entry point.
+        process = target.LaunchSimple (None, None, self.get_process_working_directory())
+        self.assertTrue(process, PROCESS_IS_VALID)
+
+        # Frame #0 should be on self.line1 and the break condition should hold.
+        from lldbsuite.test.lldbutil import get_stopped_thread
+        thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
+        self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint condition")
+
+        frame0 = thread.GetFrameAtIndex(0)
+
+        var = frame0.EvaluateExpression ("call_me_to_get_lock()")
+        self.assertTrue (var.IsValid())
+        self.assertTrue (var.GetValueAsSigned (0) == 567)