packages/Python/lldbsuite/test/lang/c/function_types/TestFunctionTypes.py

   1 """Test variable with function ptr type and that break on the function works."""
   2
   3 from __future__ import print_function
   4
   5
   6 import os
   7 import time
   8 import lldb
   9 from lldbsuite.test.decorators import *
  10 from lldbsuite.test.lldbtest import *
  11 from lldbsuite.test import lldbutil
  12
  13
  14 class FunctionTypesTestCase(TestBase):
  15
  16     mydir = TestBase.compute_mydir(__file__)
  17
  18     def setUp(self):
  19         # Call super's setUp().
  20         TestBase.setUp(self)
  21         # Find the line number to break inside main().
  22         self.line = line_number('main.c', '// Set break point at this line.')
  23
  24     def test(self):
  25         """Test 'callback' has function ptr type, then break on the function."""
  26         self.build()
  27         self.runToBreakpoint()
  28
  29         # Check that the 'callback' variable display properly.
  30         self.expect(
  31             "frame variable --show-types callback",
  32             VARIABLES_DISPLAYED_CORRECTLY,
  33             startstr='(int (*)(const char *)) callback =')
  34
  35         # And that we can break on the callback function.
  36         lldbutil.run_break_set_by_symbol(
  37             self,
  38             "string_not_empty",
  39             num_expected_locations=1,
  40             sym_exact=True)
  41         self.runCmd("continue")
  42
  43         # Check that we do indeed stop on the string_not_empty function.
  44         self.expect("process status", STOPPED_DUE_TO_BREAKPOINT,
  45                     substrs=['a.out`string_not_empty',
  46                              'stop reason = breakpoint'])
  47
  48     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr21765")
  49     def test_pointers(self):
  50         """Test that a function pointer to 'printf' works and can be called."""
  51         self.build()
  52         self.runToBreakpoint()
  53
  54         self.expect("expr string_not_empty",
  55                     substrs=['(int (*)(const char *)) $0 = ', '(a.out`'])
  56
  57         if self.platformIsDarwin():
  58             regexps = ['lib.*\.dylib`printf']
  59         else:
  60             regexps = ['printf']
  61         self.expect("expr (int (*)(const char*, ...))printf",
  62                     substrs=['(int (*)(const char *, ...)) $1 = '],
  63                     patterns=regexps)
  64
  65         self.expect("expr $1(\"Hello world\\n\")",
  66                     startstr='(int) $2 = 12')
  67
  68     def runToBreakpoint(self):
  69         exe = os.path.join(os.getcwd(), "a.out")
  70         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  71
  72         # Break inside the main.
  73         lldbutil.run_break_set_by_file_and_line(
  74             self, "main.c", self.line, num_expected_locations=1, loc_exact=True)
  75
  76         self.runCmd("run", RUN_SUCCEEDED)
  77
  78         # The stop reason of the thread should be breakpoint.
  79         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  80                     substrs=['stopped',
  81                              'stop reason = breakpoint'])
  82
  83         # The breakpoint should have a hit count of 1.
  84         self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
  85                     substrs=[' resolved, hit count = 1'])