| """Test that we are able to evaluate expressions when the inferior is blocked in a syscall""" |
| |
| from __future__ import print_function |
| |
| |
| import os |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class ExprSyscallTestCase(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| |
| @expectedFailureAll( |
| oslist=["windows"], |
| bugnumber="llvm.org/pr21765, getpid() does not exist on Windows") |
| def test_setpgid(self): |
| self.build() |
| self.expr_syscall() |
| |
| def expr_syscall(self): |
| exe = self.getBuildArtifact("a.out") |
| |
| # Create a target by the debugger. |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| listener = lldb.SBListener("my listener") |
| |
| # launch the inferior and don't wait for it to stop |
| self.dbg.SetAsync(True) |
| error = lldb.SBError() |
| process = target.Launch(listener, |
| None, # argv |
| None, # envp |
| None, # stdin_path |
| None, # stdout_path |
| None, # stderr_path |
| None, # working directory |
| 0, # launch flags |
| False, # Stop at entry |
| error) # error |
| |
| self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID) |
| |
| event = lldb.SBEvent() |
| |
| # Give the child enough time to reach the syscall, |
| # while clearing out all the pending events. |
| # The last WaitForEvent call will time out after 2 seconds. |
| while listener.WaitForEvent(2, event): |
| pass |
| |
| # now the process should be running (blocked in the syscall) |
| self.assertEqual( |
| process.GetState(), |
| lldb.eStateRunning, |
| "Process is running") |
| |
| # send the process a signal |
| process.SendAsyncInterrupt() |
| while listener.WaitForEvent(2, event): |
| pass |
| |
| # as a result the process should stop |
| # in all likelihood we have stopped in the middle of the sleep() |
| # syscall |
| self.assertEqual( |
| process.GetState(), |
| lldb.eStateStopped, |
| PROCESS_STOPPED) |
| thread = process.GetSelectedThread() |
| |
| # try evaluating a couple of expressions in this state |
| self.expect("expr release_flag = 1", substrs=[" = 1"]) |
| self.expect("print (int)getpid()", |
| substrs=[str(process.GetProcessID())]) |
| |
| # and run the process to completion |
| process.Continue() |
| |
| # process all events |
| while listener.WaitForEvent(10, event): |
| new_state = lldb.SBProcess.GetStateFromEvent(event) |
| if new_state == lldb.eStateExited: |
| break |
| |
| self.assertEqual(process.GetState(), lldb.eStateExited) |
| self.assertEqual(process.GetExitStatus(), 0) |
