TestWatchpointSetErrorCases.py revision e4b5ec026712d56f3cc259900f13158c47cb4d73 
1"""
2Test error cases for the 'watchpoint set' command to make sure it errors out when necessary.
3"""
4
5import os, time
6import unittest2
7import lldb
8from lldbtest import *
9
10class WatchpointSetErrorTestCase(TestBase):
11
12    mydir = os.path.join("functionalities", "watchpoint", "watchpoint_set_command")
13
14    def test_error_cases_with_watchpoint_set(self):
15        """Test error cases with the 'watchpoint set' command."""
16        self.buildDwarf(dictionary=self.d)
17        self.setTearDownCleanup(dictionary=self.d)
18        self.error_cases_with_watchpoint_set()
19
20    def setUp(self):
21        # Call super's setUp().
22        TestBase.setUp(self)
23        # Our simple source filename.
24        self.source = 'main.cpp'
25        # Find the line number to break inside main().
26        self.line = line_number(self.source, '// Set break point at this line.')
27        # Build dictionary to have unique executable names for each test method.
28        self.exe_name = self.testMethodName
29        self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
30
31    def error_cases_with_watchpoint_set(self):
32        """Test error cases with the 'watchpoint set' command."""
33        exe = os.path.join(os.getcwd(), self.exe_name)
34        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
35
36        # Add a breakpoint to set a watchpoint when stopped on the breakpoint.
37        self.expect("breakpoint set -l %d" % self.line, BREAKPOINT_CREATED,
38            startstr = "Breakpoint created: 1: file ='%s', line = %d, locations = 1" %
39                       (self.source, self.line))
40
41        # Run the program.
42        self.runCmd("run", RUN_SUCCEEDED)
43
44        # We should be stopped again due to the breakpoint.
45        # The stop reason of the thread should be breakpoint.
46        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
47            substrs = ['stopped',
48                       'stop reason = breakpoint'])
49
50        # Try some error conditions:
51
52        # 'watchpoint set' is now a multiword command.
53        self.expect("watchpoint set",
54            substrs = ['The following subcommands are supported:',
55                       'expression',
56                       'variable'])
57        self.runCmd("watchpoint set variable -w read_write", check=False)
58
59        # 'watchpoint set expression' with '-w' or '-x' specified now needs
60        # an option terminator and a raw expression after that.
61        self.expect("watchpoint set expression -w write --", error=True,
62            startstr = 'error: required argument missing; specify an expression to evaulate into the addres to watch for')
63
64        # It's an error if the expression did not evaluate to an address.
65        self.expect("watchpoint set expression MyAggregateDataType", error=True,
66            startstr = 'error: expression did not evaluate to an address')
67
68        # Check for missing option terminator '--'.
69        self.expect("watchpoint set expression -w write -x 1 g_char_ptr", error=True,
70            startstr = 'error: did you forget to enter the option terminator string "--"?')
71
72        # Wrong size parameter is an error.
73        self.expect("watchpoint set variable -x -128", error=True,
74            substrs = ['invalid enumeration value'])
75
76
77if __name__ == '__main__':
78    import atexit
79    lldb.SBDebugger.Initialize()
80    atexit.register(lambda: lldb.SBDebugger.Terminate())
81    unittest2.main()
82