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95c453a221
For convenience, we had added the folder that dotest.py was in to sys.path, so that we could easily write things like `import lldbutil` from anywhere and any test. This introduces a subtle problem when using Python's package system, because when unittest2 imports a particular test suite, the test suite is detached from the package. Thus, writing "import lldbutil" from dotest imports it as part of the package, and writing the same line from a test does a fresh import since the importing module was not part of the same package. The real way to fix this is to use absolute imports everywhere. Instead of writing "import lldbutil", we need to write "import lldbsuite.test.util". This patch fixes up that and all other similar cases, and additionally removes the script directory from sys.path to ensure that this can't happen again. llvm-svn: 251886
108 lines
4.1 KiB
Python
108 lines
4.1 KiB
Python
"""Test that we handle inferiors which change their process group"""
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from __future__ import print_function
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import use_lldb_suite
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import os
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import lldb
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from lldbsuite.test.lldbtest import *
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import lldbsuite.test.lldbutil as lldbutil
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class ChangeProcessGroupTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Find the line number to break for main.c.
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self.line = line_number('main.c', '// Set breakpoint here')
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@skipIfFreeBSD # Times out on FreeBSD llvm.org/pr23731
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@skipIfWindows # setpgid call does not exist on Windows
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@expectedFailureAndroid("http://llvm.org/pr23762", api_levels=[16])
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def test_setpgid(self):
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self.build()
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exe = os.path.join(os.getcwd(), 'a.out')
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# Use a file as a synchronization point between test and inferior.
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pid_file_path = lldbutil.append_to_process_working_directory(
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"pid_file_%d" % (int(time.time())))
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self.addTearDownHook(lambda: self.run_platform_command("rm %s" % (pid_file_path)))
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popen = self.spawnSubprocess(exe, [pid_file_path])
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self.addTearDownHook(self.cleanupSubprocesses)
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max_attempts = 5
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for i in range(max_attempts):
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err, retcode, msg = self.run_platform_command("ls %s" % pid_file_path)
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if err.Success() and retcode == 0:
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break
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else:
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print(msg)
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if i < max_attempts:
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# Exponential backoff!
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time.sleep(pow(2, i) * 0.25)
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else:
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self.fail("Child PID file %s not found even after %d attempts." % (pid_file_path, max_attempts))
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err, retcode, pid = self.run_platform_command("cat %s" % (pid_file_path))
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self.assertTrue(err.Success() and retcode == 0,
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"Failed to read file %s: %s, retcode: %d" % (pid_file_path, err.GetCString(), retcode))
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# make sure we cleanup the forked child also
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def cleanupChild():
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if lldb.remote_platform:
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lldb.remote_platform.Kill(int(pid))
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else:
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if os.path.exists("/proc/" + pid):
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os.kill(int(pid), signal.SIGKILL)
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self.addTearDownHook(cleanupChild)
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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listener = lldb.SBListener("my.attach.listener")
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error = lldb.SBError()
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process = target.AttachToProcessWithID(listener, int(pid), error)
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self.assertTrue(error.Success() and process, PROCESS_IS_VALID)
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# set a breakpoint just before the setpgid() call
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lldbutil.run_break_set_by_file_and_line(self, 'main.c', self.line, num_expected_locations=-1)
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thread = process.GetSelectedThread()
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# release the child from its loop
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value = thread.GetSelectedFrame().EvaluateExpression("release_child_flag = 1")
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self.assertTrue(value.IsValid() and value.GetValueAsUnsigned(0) == 1);
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process.Continue()
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# make sure the child's process group id is different from its pid
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value = thread.GetSelectedFrame().EvaluateExpression("(int)getpgid(0)")
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self.assertTrue(value.IsValid())
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self.assertNotEqual(value.GetValueAsUnsigned(0), int(pid));
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# step over the setpgid() call
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thread.StepOver()
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self.assertEqual(thread.GetStopReason(), lldb.eStopReasonPlanComplete)
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# verify that the process group has been set correctly
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# this also checks that we are still in full control of the child
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value = thread.GetSelectedFrame().EvaluateExpression("(int)getpgid(0)")
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self.assertTrue(value.IsValid())
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self.assertEqual(value.GetValueAsUnsigned(0), int(pid));
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# run to completion
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process.Continue()
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self.assertEqual(process.GetState(), lldb.eStateExited)
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def run_platform_command(self, cmd):
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platform = self.dbg.GetSelectedPlatform()
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shell_command = lldb.SBPlatformShellCommand(cmd)
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err = platform.Run(shell_command)
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return (err, shell_command.GetStatus(), shell_command.GetOutput())
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