63 lines · python
1"""2Watch larger-than-8-bytes regions of memory, confirm that3writes to those regions are detected.4"""5 6 7import lldb8from lldbsuite.test.decorators import *9from lldbsuite.test.lldbtest import *10from lldbsuite.test import lldbutil11 12 13class UnalignedWatchpointTestCase(TestBase):14 def continue_and_report_stop_reason(self, process, iter_str):15 process.Continue()16 self.assertIn(17 process.GetState(), [lldb.eStateStopped, lldb.eStateExited], iter_str18 )19 thread = process.GetSelectedThread()20 return thread.GetStopReason()21 22 NO_DEBUG_INFO_TESTCASE = True23 24 # debugserver on AArch64 has this feature.25 @skipIf(archs=no_match(["arm64", "arm64e", "aarch64"]))26 @skipUnlessDarwin27 28 # debugserver only gained the ability to watch larger regions29 # with this patch.30 def test_large_watchpoint(self):31 """Test watchpoint that covers a large region of memory."""32 self.build()33 self.main_source_file = lldb.SBFileSpec("main.c")34 (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(35 self, "break here", self.main_source_file36 )37 38 frame = thread.GetFrameAtIndex(0)39 40 array_addr = frame.GetValueForVariablePath("array").GetValueAsUnsigned()41 42 # watch 256 uint32_t elements in the middle of the array,43 # don't assume that the heap allocated array is aligned44 # to a 1024 byte boundary to begin with, force alignment.45 wa_256_addr = (array_addr + 1024) & ~(1024 - 1)46 err = lldb.SBError()47 wp_opts = lldb.SBWatchpointOptions()48 wp_opts.SetWatchpointTypeWrite(lldb.eWatchpointWriteTypeOnModify)49 wp = target.WatchpointCreateByAddress(wa_256_addr, 1024, wp_opts, err)50 self.assertTrue(wp.IsValid())51 self.assertSuccess(err)52 53 c_count = 054 reason = self.continue_and_report_stop_reason(process, "continue #%d" % c_count)55 while reason == lldb.eStopReasonWatchpoint:56 c_count = c_count + 157 reason = self.continue_and_report_stop_reason(58 process, "continue #%d" % c_count59 )60 self.assertLessEqual(c_count, 16)61 62 self.assertEqual(c_count, 16)63