| """ |
| Test lldb watchpoint that uses 'watchpoint set -w write -s size' to watch a pointed location with size. |
| """ |
| |
| from __future__ import print_function |
| |
| |
| import os |
| import time |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class WatchLocationUsingWatchpointSetTestCase(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| |
| 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" |
| # Build dictionary to have unique executable names for each test |
| # method. |
| |
| @expectedFailureAll( |
| oslist=["linux"], |
| archs=[ |
| 'aarch64', |
| 'arm'], |
| bugnumber="llvm.org/pr26031") |
| @expectedFailureAll( |
| oslist=["windows"], |
| bugnumber="llvm.org/pr24446: WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows") |
| def test_watchlocation_using_watchpoint_set(self): |
| """Test watching a location with 'watchpoint set expression -w write -s size' option.""" |
| self.build() |
| self.setTearDownCleanup() |
| |
| exe = self.getBuildArtifact("a.out") |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) |
| |
| # Add a breakpoint to set a watchpoint when stopped on the breakpoint. |
| lldbutil.run_break_set_by_file_and_line( |
| self, None, self.line, num_expected_locations=1) |
| |
| # Run the program. |
| self.runCmd("run", RUN_SUCCEEDED) |
| |
| # We should be stopped again due to the breakpoint. |
| # The stop reason of the thread should be breakpoint. |
| self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT, |
| substrs=['stopped', |
| 'stop reason = breakpoint']) |
| |
| # Now let's set a write-type watchpoint pointed to by 'g_char_ptr' and |
| # with offset as 7. |
| # The main.cpp, by design, misbehaves by not following the agreed upon |
| # protocol of only accessing the allowable index range of [0, 6]. |
| self.expect( |
| "watchpoint set expression -w write -s 1 -- g_char_ptr + 7", |
| WATCHPOINT_CREATED, |
| substrs=[ |
| 'Watchpoint created', |
| 'size = 1', |
| 'type = w']) |
| self.runCmd("expr unsigned val = g_char_ptr[7]; val") |
| self.expect(self.res.GetOutput().splitlines()[0], exe=False, |
| endstr=' = 0') |
| |
| # Use the '-v' option to do verbose listing of the watchpoint. |
| # The hit count should be 0 initially. |
| self.expect("watchpoint list -v", |
| substrs=['hit_count = 0']) |
| |
| self.runCmd("process continue") |
| |
| # We should be stopped again due to the watchpoint (write type), but |
| # only once. The stop reason of the thread should be watchpoint. |
| self.expect("thread list", STOPPED_DUE_TO_WATCHPOINT, |
| substrs=['stopped', |
| 'stop reason = watchpoint', |
| self.violating_func]) |
| |
| # Switch to the thread stopped due to watchpoint and issue some |
| # commands. |
| self.switch_to_thread_with_stop_reason(lldb.eStopReasonWatchpoint) |
| self.runCmd("thread backtrace") |
| self.runCmd("expr unsigned val = g_char_ptr[7]; val") |
| self.expect(self.res.GetOutput().splitlines()[0], exe=False, |
| endstr=' = 99') |
| |
| # Use the '-v' option to do verbose listing of the watchpoint. |
| # The hit count should now be the same as the number of threads that |
| # stopped on a watchpoint. |
| threads = lldbutil.get_stopped_threads( |
| self.process(), lldb.eStopReasonWatchpoint) |
| self.expect("watchpoint list -v", |
| substrs=['hit_count = %d' % len(threads)]) |
| |
| self.runCmd("thread backtrace all") |
