58 lines · python
1"""Test that lldb on Darwin ignores metadata in the top byte of addresses, both corefile and live."""2 3import lldb4from lldbsuite.test.decorators import *5from lldbsuite.test.lldbtest import *6from lldbsuite.test import lldbutil7 8 9class TestTBIHonored(TestBase):10 NO_DEBUG_INFO_TESTCASE = True11 12 def do_variable_access_tests(self, frame):13 self.assertEqual(14 frame.variables["pb"][0]15 .GetChildMemberWithName("p")16 .Dereference()17 .GetValueAsUnsigned(),18 15,19 )20 addr = frame.variables["pb"][0].GetChildMemberWithName("p").GetValueAsUnsigned()21 # Confirm that there is metadata in the top byte of our pointer22 self.assertEqual((addr >> 56) & 0xFF, 0xFE)23 self.expect("expr -- *pb.p", substrs=["15"])24 self.expect("frame variable *pb.p", substrs=["15"])25 self.expect("expr -- *(int*)0x%x" % addr, substrs=["15"])26 27 # This test is valid on AArch64 systems with TBI mode enabled,28 # and an address mask that clears the top byte before reading29 # from memory.30 @skipUnlessDarwin31 @skipIf(archs=no_match(["arm64", "arm64e"]))32 @skipIfRemote33 def test(self):34 corefile = self.getBuildArtifact("process.core")35 self.build()36 (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(37 self, "// break here", lldb.SBFileSpec("main.c")38 )39 40 # Test that we can dereference a pointer with TBI data41 # in a live process.42 self.do_variable_access_tests(thread.GetFrameAtIndex(0))43 44 # Create a corefile, delete this process45 self.runCmd("process save-core -s stack " + corefile)46 process.Destroy()47 self.dbg.DeleteTarget(target)48 49 # Now load the corefile50 target = self.dbg.CreateTarget("")51 process = target.LoadCore(corefile)52 thread = process.GetSelectedThread()53 self.assertTrue(process.GetSelectedThread().IsValid())54 55 # Test that we can dereference a pointer with TBI data56 # in a corefile process.57 self.do_variable_access_tests(thread.GetFrameAtIndex(0))58