lldb/test/API/functionalities/longjmp/TestLongjmp.py

   1 """
   2 Test the use of setjmp/longjmp for non-local goto operations in a single-threaded inferior.
   3 """
   4
   5
   6 import lldb
   7 from lldbsuite.test.decorators import *
   8 from lldbsuite.test.lldbtest import *
   9 from lldbsuite.test import lldbutil
  10
  11
  12 class LongjmpTestCase(TestBase):
  13     @skipIfDarwin  # llvm.org/pr16769: LLDB on Mac OS X dies in function ReadRegisterBytes in GDBRemoteRegisterContext.cpp
  14     @expectedFailureAll(oslist=["freebsd", "linux"], bugnumber="llvm.org/pr20231")
  15     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
  16     @expectedFlakeyNetBSD
  17     def test_step_out(self):
  18         """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-out."""
  19         self.build()
  20         self.step_out()
  21
  22     @skipIfDarwin  # llvm.org/pr16769: LLDB on Mac OS X dies in function ReadRegisterBytes in GDBRemoteRegisterContext.cpp
  23     @expectedFailureAll(oslist=["freebsd", "linux"], bugnumber="llvm.org/pr20231")
  24     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
  25     @skipIfNetBSD
  26     def test_step_over(self):
  27         """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-over a longjmp."""
  28         self.build()
  29         self.step_over()
  30
  31     @skipIfDarwin  # llvm.org/pr16769: LLDB on Mac OS X dies in function ReadRegisterBytes in GDBRemoteRegisterContext.cpp
  32     @expectedFailureAll(oslist=["freebsd", "linux"], bugnumber="llvm.org/pr20231")
  33     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
  34     @expectedFlakeyNetBSD
  35     def test_step_back_out(self):
  36         """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-out after thread step-in."""
  37         self.build()
  38         self.step_back_out()
  39
  40     def start_test(self, symbol):
  41         exe = self.getBuildArtifact("a.out")
  42
  43         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  44
  45         # Break in main().
  46         lldbutil.run_break_set_by_symbol(self, symbol, num_expected_locations=-1)
  47
  48         self.runCmd("run", RUN_SUCCEEDED)
  49
  50         # The stop reason of the thread should be breakpoint.
  51         self.expect(
  52             "thread list",
  53             STOPPED_DUE_TO_BREAKPOINT,
  54             substrs=["stopped", "stop reason = breakpoint"],
  55         )
  56
  57     def check_status(self):
  58         # Note: Depending on the generated mapping of DWARF to assembly,
  59         # the process may have stopped or exited.
  60         self.expect(
  61             "process status",
  62             PROCESS_STOPPED,
  63             patterns=["Process .* exited with status = 0"],
  64         )
  65
  66     def step_out(self):
  67         self.start_test("do_jump")
  68         self.runCmd("thread step-out", RUN_SUCCEEDED)
  69         self.check_status()
  70
  71     def step_over(self):
  72         self.start_test("do_jump")
  73         self.runCmd("thread step-over", RUN_SUCCEEDED)
  74         self.runCmd("thread step-over", RUN_SUCCEEDED)
  75         self.check_status()
  76
  77     def step_back_out(self):
  78         self.start_test("main")
  79
  80         self.runCmd("thread step-over", RUN_SUCCEEDED)
  81         self.runCmd("thread step-in", RUN_SUCCEEDED)
  82         self.runCmd("thread step-out", RUN_SUCCEEDED)
  83         self.check_status()