packages/Python/lldbsuite/test/functionalities/unwind/sigtramp/TestSigtrampUnwind.py

   1 """
   2 Test that we can backtrace correctly with 'sigtramp' functions on the stack
   3 """
   4
   5 from __future__ import print_function
   6
   7
   8 import os
   9 import time
  10 import lldb
  11 from lldbsuite.test.decorators import *
  12 from lldbsuite.test.lldbtest import *
  13 from lldbsuite.test import lldbutil
  14
  15
  16 class SigtrampUnwind(TestBase):
  17     mydir = TestBase.compute_mydir(__file__)
  18
  19     # On different platforms the "_sigtramp" and "__kill" frames are likely to be different.
  20     # This test could probably be adapted to run on linux/*bsd easily enough.
  21     @skipUnlessDarwin
  22     def test(self):
  23         """Test that we can backtrace correctly with _sigtramp on the stack"""
  24         self.build()
  25         self.setTearDownCleanup()
  26
  27         exe = os.path.join(os.getcwd(), "a.out")
  28         target = self.dbg.CreateTarget(exe)
  29         self.assertTrue(target, VALID_TARGET)
  30
  31         lldbutil.run_break_set_by_file_and_line(self, "main.c", line_number(
  32             'main.c', '// Set breakpoint here'), num_expected_locations=1)
  33
  34         process = target.LaunchSimple(
  35             None, None, self.get_process_working_directory())
  36
  37         if not process:
  38             self.fail("SBTarget.Launch() failed")
  39
  40         if process.GetState() != lldb.eStateStopped:
  41             self.fail("Process should be in the 'stopped' state, "
  42                       "instead the actual state is: '%s'" %
  43                       lldbutil.state_type_to_str(process.GetState()))
  44
  45         self.expect(
  46             "pro handle  -n false -p true -s false SIGUSR1",
  47             "Have lldb pass SIGUSR1 signals",
  48             substrs=[
  49                 "SIGUSR1",
  50                 "true",
  51                 "false",
  52                 "false"])
  53
  54         lldbutil.run_break_set_by_symbol(
  55             self,
  56             "handler",
  57             num_expected_locations=1,
  58             module_name="a.out")
  59
  60         self.runCmd("continue")
  61
  62         thread = process.GetThreadAtIndex(0)
  63
  64         found_handler = False
  65         found_sigtramp = False
  66         found_kill = False
  67         found_main = False
  68
  69         for f in thread.frames:
  70             if f.GetFunctionName() == "handler":
  71                 found_handler = True
  72             if f.GetFunctionName() == "_sigtramp":
  73                 found_sigtramp = True
  74             if f.GetFunctionName() == "__kill":
  75                 found_kill = True
  76             if f.GetFunctionName() == "main":
  77                 found_main = True
  78
  79         if self.TraceOn():
  80             print("Backtrace once we're stopped:")
  81             for f in thread.frames:
  82                 print("  %d %s" % (f.GetFrameID(), f.GetFunctionName()))
  83
  84         if not found_handler:
  85             self.fail("Unable to find handler() in backtrace.")
  86
  87         if not found_sigtramp:
  88             self.fail("Unable to find _sigtramp() in backtrace.")
  89
  90         if not found_kill:
  91             self.fail("Unable to find kill() in backtrace.")
  92
  93         if not found_main:
  94             self.fail("Unable to find main() in backtrace.")