Daniel Malea | 015f7ad | 2013-05-08 15:09:30 +0000 | [diff] [blame] | 1 | """ |
| 2 | Test lldb ability to unwind a stack with a function containing a call to the |
| 3 | '__builtin_trap' intrinsic, which GCC (4.6) encodes to an illegal opcode. |
| 4 | """ |
| 5 | |
| 6 | import os |
| 7 | import unittest2 |
| 8 | import lldb |
| 9 | from lldbtest import * |
| 10 | import lldbutil |
| 11 | |
| 12 | class BuiltinTrapTestCase(TestBase): |
| 13 | |
| 14 | mydir = os.path.join("linux", "builtin_trap") |
| 15 | |
| 16 | @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") |
| 17 | @dsym_test |
| 18 | def test_with_dsym_and_run_command(self): |
| 19 | """Test that LLDB handles a function with __builtin_trap correctly.""" |
| 20 | self.buildDsym() |
| 21 | self.builtin_trap_unwind() |
| 22 | |
| 23 | @dwarf_test |
Daniel Malea | 6bc4dcd | 2013-05-15 18:48:32 +0000 | [diff] [blame] | 24 | @expectedFailureGcc # llvm.org/pr15936: LLDB is omits a function that contains an |
Daniel Malea | 015f7ad | 2013-05-08 15:09:30 +0000 | [diff] [blame] | 25 | # illegal opcode from backtraces. This |
| 26 | # failure is GCC 4.6 specific. |
| 27 | def test_with_dwarf_and_run_command(self): |
| 28 | """Test that LLDB handles a function with __builtin_trap correctly.""" |
| 29 | self.buildDwarf() |
| 30 | self.builtin_trap_unwind() |
| 31 | |
| 32 | def setUp(self): |
| 33 | # Call super's setUp(). |
| 34 | TestBase.setUp(self) |
| 35 | # Find the line number to break at. |
| 36 | self.line = line_number('main.cpp', '// Set break point at this line.') |
| 37 | |
| 38 | def builtin_trap_unwind(self): |
| 39 | """Test that LLDB handles unwinding a frame that contains a function |
| 40 | with a __builtin_trap intrinsic. |
| 41 | """ |
| 42 | self.runCmd("file a.out", CURRENT_EXECUTABLE_SET) |
| 43 | |
| 44 | lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, |
| 45 | num_expected_locations=1, |
| 46 | loc_exact=True) |
| 47 | |
| 48 | self.runCmd("run", RUN_SUCCEEDED) |
| 49 | |
| 50 | # The stop reason of the thread should be breakpoint. |
| 51 | self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT, |
| 52 | substrs = ['stopped', |
| 53 | 'stop reason = breakpoint']) |
| 54 | |
| 55 | # print backtrace, expect both 'bar' and 'main' functions to be listed |
| 56 | self.expect('bt', substrs = ['bar', 'main']) |
| 57 | |
| 58 | # go up one frame |
| 59 | self.runCmd("up", RUN_SUCCEEDED) |
| 60 | |
| 61 | # evaluate a local |
| 62 | self.expect('p foo', substrs = ['= 5']) |
| 63 | |
| 64 | |
| 65 | |
| 66 | if __name__ == '__main__': |
| 67 | import atexit |
| 68 | lldb.SBDebugger.Initialize() |
| 69 | atexit.register(lambda: lldb.SBDebugger.Terminate()) |
| 70 | unittest2.main() |