1""" 2Test "print object" where another thread blocks the print object from making progress. 3""" 4 5from __future__ import print_function 6 7 8import lldb 9from lldbsuite.test.decorators import * 10from lldbsuite.test.lldbtest import * 11from lldbsuite.test import lldbutil 12 13 14class PrintObjTestCase(TestBase): 15 16 mydir = TestBase.compute_mydir(__file__) 17 18 def setUp(self): 19 # Call super's setUp(). 20 TestBase.setUp(self) 21 # My source program. 22 self.source = "blocked.m" 23 # Find the line numbers to break at. 24 self.line = line_number(self.source, '// Set a breakpoint here.') 25 26 @skipIfReproducer # FIXME: Unexpected packet during (active) replay 27 def test_print_obj(self): 28 """ 29 Test "print object" where another thread blocks the print object from making progress. 30 31 Set a breakpoint on the line in my_pthread_routine. Then switch threads 32 to the main thread, and do print the lock_me object. Since that will 33 try to get the lock already gotten by my_pthread_routime thread, it will 34 have to switch to running all threads, and that should then succeed. 35 """ 36 d = {'EXE': 'b.out'} 37 self.build(dictionary=d) 38 self.setTearDownCleanup(dictionary=d) 39 exe = self.getBuildArtifact('b.out') 40 41 target = self.dbg.CreateTarget(exe) 42 self.assertTrue(target, VALID_TARGET) 43 44 breakpoint = target.BreakpointCreateByLocation(self.source, self.line) 45 self.assertTrue(breakpoint, VALID_BREAKPOINT) 46 self.runCmd("breakpoint list") 47 48 # Launch the process, and do not stop at the entry point. 49 process = target.LaunchSimple( 50 None, None, self.get_process_working_directory()) 51 52 self.runCmd("thread backtrace all") 53 54 # Let's get the current stopped thread. We'd like to switch to the 55 # other thread to issue our 'po lock_me' command. 56 import lldbsuite.test.lldbutil as lldbutil 57 this_thread = lldbutil.get_stopped_thread( 58 process, lldb.eStopReasonBreakpoint) 59 self.assertTrue(this_thread) 60 61 # Find the other thread. The iteration protocol of SBProcess and the 62 # rich comparison methods (__eq__/__ne__) of SBThread come in handy. 63 other_thread = None 64 for t in process: 65 if t != this_thread: 66 other_thread = t 67 break 68 69 # Set the other thread as the selected thread to issue our 'po' 70 # command.other 71 self.assertTrue(other_thread) 72 process.SetSelectedThread(other_thread) 73 if self.TraceOn(): 74 print("selected thread:" + lldbutil.get_description(other_thread)) 75 self.runCmd("thread backtrace") 76 77 # We want to traverse the frame to the one corresponding to blocked.m to 78 # issue our 'po lock_me' command. 79 80 depth = other_thread.GetNumFrames() 81 for i in range(depth): 82 frame = other_thread.GetFrameAtIndex(i) 83 name = frame.GetFunctionName() 84 if name == 'main': 85 other_thread.SetSelectedFrame(i) 86 if self.TraceOn(): 87 print("selected frame:" + lldbutil.get_description(frame)) 88 break 89 90 self.expect("po lock_me", OBJECT_PRINTED_CORRECTLY, 91 substrs=['I am pretty special.']) 92