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      1 """
      2 Test thread stepping features in combination with frame select.
      3 """
      4 
      5 import os, time
      6 import re
      7 import unittest2
      8 import lldb, lldbutil
      9 from lldbtest import *
     10 import lldbutil
     11 
     12 class ThreadSteppingTestCase(TestBase):
     13 
     14     mydir = os.path.join("lang", "c", "stepping")
     15 
     16     @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
     17     @dsym_test
     18     def test_step_out_with_dsym_and_run_command(self):
     19         """Exercise thread step-out and frame select followed by thread step-out."""
     20         self.buildDwarf()
     21         self.thread_step_out()
     22 
     23     @dwarf_test
     24     def test_step_out_with_dwarf_and_run_command(self):
     25         """Exercise thread step-out and frame select followed by thread step-out."""
     26         self.buildDwarf()
     27         self.thread_step_out()
     28 
     29     def setUp(self):
     30         # Call super's setUp().
     31         TestBase.setUp(self)
     32         # Find the line number to of function 'c'.
     33         self.line1 = line_number('main.c', '// Find the line number of function "c" here.')
     34         self.line2 = line_number('main.c', '// frame select 2, thread step-out while stopped at "c(1)"')
     35         self.line3 = line_number('main.c', '// thread step-out while stopped at "c(2)"')
     36         self.line4 = line_number('main.c', '// frame select 1, thread step-out while stopped at "c(3)"')
     37 
     38     def thread_step_out(self):
     39         """Exercise thread step-out and frame select followed by thread step-out."""
     40         exe = os.path.join(os.getcwd(), "a.out")
     41         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
     42 
     43         # Create a breakpoint inside function 'c'.
     44         lldbutil.run_break_set_by_file_and_line (self, "main.c", self.line1, num_expected_locations=1, loc_exact=True)
     45 
     46         # Now run the program.
     47         self.runCmd("run", RUN_SUCCEEDED)
     48 
     49         # The process should be stopped at this point.
     50         self.expect("process status", PROCESS_STOPPED,
     51             patterns = ['Process .* stopped'])
     52 
     53         # The frame #0 should correspond to main.c:32, the executable statement
     54         # in function name 'c'.  And frame #3 should point to main.c:37.
     55         self.expect("thread backtrace", STOPPED_DUE_TO_BREAKPOINT,
     56             substrs = ["stop reason = breakpoint"],
     57             patterns = ["frame #0.*main.c:%d" % self.line1,
     58                         "frame #3.*main.c:%d" % self.line2])
     59 
     60         # We want to move the pc to frame #3.  This can be accomplished by
     61         # 'frame select 2', followed by 'thread step-out'.
     62         self.runCmd("frame select 2")
     63         self.runCmd("thread step-out")
     64         self.expect("thread backtrace", STEP_OUT_SUCCEEDED,
     65             substrs = ["stop reason = step out"],
     66             patterns = ["frame #0.*main.c:%d" % self.line2])
     67 
     68         # Let's move on to a single step-out case.
     69         self.runCmd("process continue")
     70 
     71         # The process should be stopped at this point.
     72         self.expect("process status", PROCESS_STOPPED,
     73             patterns = ['Process .* stopped'])
     74         self.runCmd("thread step-out")
     75         self.expect("thread backtrace", STEP_OUT_SUCCEEDED,
     76             substrs = ["stop reason = step out"],
     77             patterns = ["frame #0.*main.c:%d" % self.line3])
     78 
     79         # Do another frame selct, followed by thread step-out.
     80         self.runCmd("process continue")
     81 
     82         # The process should be stopped at this point.
     83         self.expect("process status", PROCESS_STOPPED,
     84             patterns = ['Process .* stopped'])
     85         self.runCmd("frame select 1")
     86         self.runCmd("thread step-out")
     87         self.expect("thread backtrace", STEP_OUT_SUCCEEDED,
     88             substrs = ["stop reason = step out"],
     89             patterns = ["frame #0.*main.c:%d" % self.line4])
     90         
     91         
     92 if __name__ == '__main__':
     93     import atexit
     94     lldb.SBDebugger.Initialize()
     95     atexit.register(lambda: lldb.SBDebugger.Terminate())
     96     unittest2.main()
     97