1"""Test that we are able to evaluate expressions when the inferior is blocked in a syscall""" 2 3import lldb 4from lldbsuite.test.decorators import * 5from lldbsuite.test.lldbtest import * 6from lldbsuite.test import lldbutil 7 8 9class ExprSyscallTestCase(TestBase): 10 @expectedFailureAll( 11 oslist=["windows"], 12 bugnumber="llvm.org/pr21765, getpid() does not exist on Windows", 13 ) 14 @expectedFailureNetBSD 15 def test_setpgid(self): 16 self.build() 17 self.expr_syscall() 18 19 def expr_syscall(self): 20 # Create a target by the debugger. 21 target = self.createTestTarget() 22 23 listener = lldb.SBListener("my listener") 24 25 # launch the inferior and don't wait for it to stop 26 self.dbg.SetAsync(True) 27 error = lldb.SBError() 28 flags = target.GetLaunchInfo().GetLaunchFlags() 29 process = target.Launch( 30 listener, 31 None, # argv 32 None, # envp 33 None, # stdin_path 34 None, # stdout_path 35 None, # stderr_path 36 None, # working directory 37 flags, # launch flags 38 False, # Stop at entry 39 error, 40 ) # error 41 42 self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID) 43 44 event = lldb.SBEvent() 45 46 # Give the child enough time to reach the syscall, 47 # while clearing out all the pending events. 48 # The last WaitForEvent call will time out after 2 seconds. 49 while listener.WaitForEvent(2, event): 50 pass 51 52 # now the process should be running (blocked in the syscall) 53 self.assertEqual(process.GetState(), lldb.eStateRunning, "Process is running") 54 55 # send the process a signal 56 process.SendAsyncInterrupt() 57 while listener.WaitForEvent(2, event): 58 pass 59 60 # as a result the process should stop 61 # in all likelihood we have stopped in the middle of the sleep() 62 # syscall 63 self.assertEqual(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED) 64 thread = process.GetSelectedThread() 65 66 # try evaluating a couple of expressions in this state 67 self.expect_expr("release_flag = 1", result_value="1") 68 self.expect_expr("(int)getpid()", result_value=str(process.GetProcessID())) 69 70 # and run the process to completion 71 process.Continue() 72 73 # process all events 74 while listener.WaitForEvent(10, event): 75 new_state = lldb.SBProcess.GetStateFromEvent(event) 76 if new_state == lldb.eStateExited: 77 break 78 79 self.assertState(process.GetState(), lldb.eStateExited) 80 self.assertEqual(process.GetExitStatus(), 0) 81