| """ |
| Use lldb Python SBValue.WatchPointee() API to create a watchpoint for write of '*g_char_ptr'. |
| """ |
| |
| import os, time |
| import re |
| import unittest2 |
| import lldb, lldbutil |
| from lldbtest import * |
| |
| class SetWatchlocationAPITestCase(TestBase): |
| |
| mydir = os.path.join("python_api", "watchpoint", "watchlocation") |
| |
| def setUp(self): |
| # Call super's setUp(). |
| TestBase.setUp(self) |
| # Our simple source filename. |
| self.source = 'main.cpp' |
| # Find the line number to break inside main(). |
| self.line = line_number(self.source, '// Set break point at this line.') |
| # This is for verifying that watch location works. |
| self.violating_func = "do_bad_thing_with_location"; |
| |
| @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") |
| @python_api_test |
| @dsym_test |
| def test_watch_location_with_dsym(self): |
| """Exercise SBValue.WatchPointee() API to set a watchpoint.""" |
| self.buildDsym() |
| self.do_set_watchlocation() |
| |
| @python_api_test |
| @dwarf_test |
| def test_watch_location_with_dwarf(self): |
| """Exercise SBValue.WatchPointee() API to set a watchpoint.""" |
| self.buildDwarf() |
| self.do_set_watchlocation() |
| |
| def do_set_watchlocation(self): |
| """Use SBValue.WatchPointee() to set a watchpoint and verify that the program stops later due to the watchpoint.""" |
| exe = os.path.join(os.getcwd(), "a.out") |
| |
| # Create a target by the debugger. |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| # Now create a breakpoint on main.c. |
| breakpoint = target.BreakpointCreateByLocation(self.source, self.line) |
| self.assertTrue(breakpoint and |
| breakpoint.GetNumLocations() == 1, |
| VALID_BREAKPOINT) |
| |
| # Now launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple(None, None, os.getcwd()) |
| |
| # We should be stopped due to the breakpoint. Get frame #0. |
| process = target.GetProcess() |
| self.assertTrue(process.GetState() == lldb.eStateStopped, |
| PROCESS_STOPPED) |
| thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint) |
| frame0 = thread.GetFrameAtIndex(0) |
| |
| value = frame0.FindValue('g_char_ptr', |
| lldb.eValueTypeVariableGlobal) |
| pointee = value.CreateValueFromAddress("pointee", |
| value.GetValueAsUnsigned(0), |
| value.GetType().GetPointeeType()) |
| # Watch for write to *g_char_ptr. |
| error = lldb.SBError(); |
| watchpoint = value.WatchPointee(True, False, True, error) |
| self.assertTrue(value and watchpoint, |
| "Successfully found the pointer and set a watchpoint") |
| self.DebugSBValue(value) |
| self.DebugSBValue(pointee) |
| |
| # Hide stdout if not running with '-t' option. |
| if not self.TraceOn(): |
| self.HideStdout() |
| |
| print watchpoint |
| |
| # Continue. Expect the program to stop due to the variable being written to. |
| process.Continue() |
| |
| if (self.TraceOn()): |
| lldbutil.print_stacktraces(process) |
| |
| thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonWatchpoint) |
| self.assertTrue(thread, "The thread stopped due to watchpoint") |
| self.DebugSBValue(value) |
| self.DebugSBValue(pointee) |
| |
| self.expect(lldbutil.print_stacktrace(thread, string_buffer=True), exe=False, |
| substrs = [self.violating_func]) |
| |
| # This finishes our test. |
| |
| |
| if __name__ == '__main__': |
| import atexit |
| lldb.SBDebugger.Initialize() |
| atexit.register(lambda: lldb.SBDebugger.Terminate()) |
| unittest2.main() |