1 """ 2 Test lldb watchpoint that uses 'watchpoint set -w write -x size' to watch a pointed location with size. 3 """ 4 5 import os, time 6 import unittest2 7 import lldb 8 from lldbtest import * 9 import lldbutil 10 11 class WatchLocationUsingWatchpointSetTestCase(TestBase): 12 13 mydir = os.path.join("functionalities", "watchpoint", "watchpoint_set_command") 14 15 @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") 16 @dsym_test 17 def test_watchlocation_with_dsym_using_watchpoint_set(self): 18 """Test watching a location with 'watchpoint set expression -w write -x size' option.""" 19 self.buildDsym(dictionary=self.d) 20 self.setTearDownCleanup(dictionary=self.d) 21 self.watchlocation_using_watchpoint_set() 22 23 @expectedFailureFreeBSD('llvm.org/pr16706') # Watchpoints fail on FreeBSD 24 @dwarf_test 25 def test_watchlocation_with_dwarf_using_watchpoint_set(self): 26 """Test watching a location with 'watchpoint set expression -w write -x size' option.""" 27 self.buildDwarf(dictionary=self.d) 28 self.setTearDownCleanup(dictionary=self.d) 29 self.watchlocation_using_watchpoint_set() 30 31 def setUp(self): 32 # Call super's setUp(). 33 TestBase.setUp(self) 34 # Our simple source filename. 35 self.source = 'main.cpp' 36 # Find the line number to break inside main(). 37 self.line = line_number(self.source, '// Set break point at this line.') 38 # This is for verifying that watch location works. 39 self.violating_func = "do_bad_thing_with_location"; 40 # Build dictionary to have unique executable names for each test method. 41 self.exe_name = self.testMethodName 42 self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name} 43 44 def watchlocation_using_watchpoint_set(self): 45 """Test watching a location with '-x size' option.""" 46 exe = os.path.join(os.getcwd(), self.exe_name) 47 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) 48 49 # Add a breakpoint to set a watchpoint when stopped on the breakpoint. 50 lldbutil.run_break_set_by_file_and_line (self, None, self.line, num_expected_locations=1) 51 52 # Run the program. 53 self.runCmd("run", RUN_SUCCEEDED) 54 55 # We should be stopped again due to the breakpoint. 56 # The stop reason of the thread should be breakpoint. 57 self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT, 58 substrs = ['stopped', 59 'stop reason = breakpoint']) 60 61 # Now let's set a write-type watchpoint pointed to by 'g_char_ptr' and 62 # with offset as 7. 63 # The main.cpp, by design, misbehaves by not following the agreed upon 64 # protocol of only accessing the allowable index range of [0, 6]. 65 self.expect("watchpoint set expression -w write -x 1 -- g_char_ptr + 7", WATCHPOINT_CREATED, 66 substrs = ['Watchpoint created', 'size = 1', 'type = w']) 67 self.runCmd("expr unsigned val = g_char_ptr[7]; val") 68 self.expect(self.res.GetOutput().splitlines()[0], exe=False, 69 endstr = ' = 0') 70 71 # Use the '-v' option to do verbose listing of the watchpoint. 72 # The hit count should be 0 initially. 73 self.expect("watchpoint list -v", 74 substrs = ['hit_count = 0']) 75 76 self.runCmd("process continue") 77 78 # We should be stopped again due to the watchpoint (write type), but 79 # only once. The stop reason of the thread should be watchpoint. 80 self.expect("thread list", STOPPED_DUE_TO_WATCHPOINT, 81 substrs = ['stopped', 82 'stop reason = watchpoint', 83 self.violating_func]) 84 85 # Switch to the thread stopped due to watchpoint and issue some commands. 86 self.switch_to_thread_with_stop_reason(lldb.eStopReasonWatchpoint) 87 self.runCmd("thread backtrace") 88 self.runCmd("expr unsigned val = g_char_ptr[7]; val") 89 self.expect(self.res.GetOutput().splitlines()[0], exe=False, 90 endstr = ' = 99') 91 92 # Use the '-v' option to do verbose listing of the watchpoint. 93 # The hit count should now be 1. 94 self.expect("watchpoint list -v", 95 substrs = ['hit_count = 1']) 96 97 self.runCmd("thread backtrace all") 98 99 100 if __name__ == '__main__': 101 import atexit 102 lldb.SBDebugger.Initialize() 103 atexit.register(lambda: lldb.SBDebugger.Terminate()) 104 unittest2.main() 105
