Move lldb/test to lldb/packages/Python/lldbsuite/test.

This is the conclusion of an effort to get LLDB's Python code
structured into a bona-fide Python package.  This has a number
of benefits, but most notably the ability to more easily share
Python code between different but related pieces of LLDB's Python
infrastructure (for example, `scripts` can now share code with
`test`).

llvm-svn: 251532

1 files changed, 102 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/process_group/TestChangeProcessGroup.py b/lldb/packages/Python/lldbsuite/test/functionalities/process_group/TestChangeProcessGroup.py
new file mode 100644
index 00000000000..8779e5e84da
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/process_group/TestChangeProcessGroup.py
@@ -0,0 +1,102 @@
+"""Test that we handle inferiors which change their process group"""
+
+from __future__ import print_function
+
+import use_lldb_suite
+
+import os
+import lldb
+from lldbtest import *
+import lldbutil
+
+
+class ChangeProcessGroupTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break for main.c.
+        self.line = line_number('main.c', '// Set breakpoint here')
+
+    @skipIfFreeBSD # Times out on FreeBSD llvm.org/pr23731
+    @skipIfWindows # setpgid call does not exist on Windows
+    @expectedFailureAndroid("http://llvm.org/pr23762", api_levels=[16])
+    def test_setpgid(self):
+        self.build()
+        exe = os.path.join(os.getcwd(), 'a.out')
+
+        # Use a file as a synchronization point between test and inferior.
+        pid_file_path = lldbutil.append_to_process_working_directory(
+                "pid_file_%d" % (int(time.time())))
+        self.addTearDownHook(lambda: self.run_platform_command("rm %s" % (pid_file_path)))
+
+        popen = self.spawnSubprocess(exe, [pid_file_path])
+        self.addTearDownHook(self.cleanupSubprocesses)
+
+        max_attempts = 5
+        for i in range(max_attempts):
+            err, retcode, msg = self.run_platform_command("ls %s" % pid_file_path)
+            if err.Success() and retcode == 0:
+                break
+            else:
+                print(msg)
+            if i < max_attempts:
+                # Exponential backoff!
+                time.sleep(pow(2, i) * 0.25)
+        else:
+            self.fail("Child PID file %s not found even after %d attempts." % (pid_file_path, max_attempts))
+
+        err, retcode, pid = self.run_platform_command("cat %s" % (pid_file_path))
+
+        self.assertTrue(err.Success() and retcode == 0,
+                "Failed to read file %s: %s, retcode: %d" % (pid_file_path, err.GetCString(), retcode))
+
+        # make sure we cleanup the forked child also
+        def cleanupChild():
+            if lldb.remote_platform:
+                lldb.remote_platform.Kill(int(pid))
+            else:
+                if os.path.exists("/proc/" + pid):
+                    os.kill(int(pid), signal.SIGKILL)
+        self.addTearDownHook(cleanupChild)
+
+        # Create a target by the debugger.
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        listener = lldb.SBListener("my.attach.listener")
+        error = lldb.SBError()
+        process = target.AttachToProcessWithID(listener, int(pid), error)
+        self.assertTrue(error.Success() and process, PROCESS_IS_VALID)
+
+        # set a breakpoint just before the setpgid() call
+        lldbutil.run_break_set_by_file_and_line(self, 'main.c', self.line, num_expected_locations=-1)
+
+        thread = process.GetSelectedThread()
+
+        # release the child from its loop
+        self.expect("expr release_child_flag = 1", substrs = ["= 1"])
+        process.Continue()
+
+        # make sure the child's process group id is different from its pid
+        self.expect("print (int)getpgid(0)", substrs = [pid], matching=False)
+
+        # step over the setpgid() call
+        thread.StepOver()
+        self.assertEqual(thread.GetStopReason(), lldb.eStopReasonPlanComplete)
+
+        # verify that the process group has been set correctly
+        # this also checks that we are still in full control of the child
+        self.expect("print (pid_t)getpgid(0)", substrs = [pid])
+
+        # run to completion
+        process.Continue()
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+
+    def run_platform_command(self, cmd):
+        platform = self.dbg.GetSelectedPlatform()
+        shell_command = lldb.SBPlatformShellCommand(cmd)
+        err = platform.Run(shell_command)
+        return (err, shell_command.GetStatus(), shell_command.GetOutput())