packages/Python/lldbsuite/test/lang/c/forward/TestForwardDeclaration.py

   1 """Test that forward declaration of a data structure gets resolved correctly."""
   2
   3 from __future__ import print_function
   4
   5
   6
   7 import os, time
   8 import lldb
   9 from lldbsuite.test.lldbtest import *
  10 import lldbsuite.test.lldbutil as lldbutil
  11
  12 class ForwardDeclarationTestCase(TestBase):
  13
  14     mydir = TestBase.compute_mydir(__file__)
  15
  16     def test_and_run_command(self):
  17         """Display *bar_ptr when stopped on a function with forward declaration of struct bar."""
  18         self.build()
  19         exe = os.path.join(os.getcwd(), "a.out")
  20         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  21
  22         # Break inside the foo function which takes a bar_ptr argument.
  23         lldbutil.run_break_set_by_symbol (self, "foo", num_expected_locations=1, sym_exact=True)
  24
  25         self.runCmd("run", RUN_SUCCEEDED)
  26
  27         # The stop reason of the thread should be breakpoint.
  28         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  29             substrs = ['stopped',
  30                        'stop reason = breakpoint'])
  31
  32         # The breakpoint should have a hit count of 1.
  33         self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
  34             substrs = [' resolved, hit count = 1'])
  35
  36         # This should display correctly.
  37         # Note that the member fields of a = 1 and b = 2 is by design.
  38         self.expect("frame variable --show-types *bar_ptr", VARIABLES_DISPLAYED_CORRECTLY,
  39             substrs = ['(bar) *bar_ptr = ',
  40                        '(int) a = 1',
  41                        '(int) b = 2'])
  42
  43         # And so should this.
  44         self.expect("expression --show-types -- *bar_ptr", VARIABLES_DISPLAYED_CORRECTLY,
  45             substrs = ['(bar)',
  46                        '(int) a = 1',
  47                        '(int) b = 2'])