| """ |
| Watch larger-than-8-bytes regions of memory, confirm that |
| writes to those regions are detected. |
| """ |
| |
| |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class UnalignedWatchpointTestCase(TestBase): |
| def continue_and_report_stop_reason(self, process, iter_str): |
| process.Continue() |
| self.assertIn( |
| process.GetState(), [lldb.eStateStopped, lldb.eStateExited], iter_str |
| ) |
| thread = process.GetSelectedThread() |
| return thread.GetStopReason() |
| |
| NO_DEBUG_INFO_TESTCASE = True |
| |
| # debugserver on AArch64 has this feature. |
| @skipIf(archs=no_match(["arm64", "arm64e", "aarch64"])) |
| @skipUnlessDarwin |
| |
| # debugserver only gained the ability to watch larger regions |
| # with this patch. |
| @skipIfOutOfTreeDebugserver |
| def test_large_watchpoint(self): |
| """Test watchpoint that covers a large region of memory.""" |
| self.build() |
| self.main_source_file = lldb.SBFileSpec("main.c") |
| (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint( |
| self, "break here", self.main_source_file |
| ) |
| |
| frame = thread.GetFrameAtIndex(0) |
| |
| array_addr = frame.GetValueForVariablePath("array").GetValueAsUnsigned() |
| |
| # watch 256 uint32_t elements in the middle of the array, |
| # don't assume that the heap allocated array is aligned |
| # to a 1024 byte boundary to begin with, force alignment. |
| wa_256_addr = (array_addr + 1024) & ~(1024 - 1) |
| err = lldb.SBError() |
| wp = target.WatchAddress(wa_256_addr, 1024, False, True, err) |
| self.assertTrue(wp.IsValid()) |
| self.assertSuccess(err) |
| |
| c_count = 0 |
| reason = self.continue_and_report_stop_reason(process, "continue #%d" % c_count) |
| while reason == lldb.eStopReasonWatchpoint: |
| c_count = c_count + 1 |
| reason = self.continue_and_report_stop_reason( |
| process, "continue #%d" % c_count |
| ) |
| self.assertLessEqual(c_count, 16) |
| |
| self.assertEqual(c_count, 16) |
