1"""
2Test that "memory region" command can show memory tagged regions
3on AArch64 Linux.
4"""
5
6
7
8import lldb
9from lldbsuite.test.decorators import *
10from lldbsuite.test.lldbtest import *
11from lldbsuite.test import lldbutil
12
13
14class AArch64LinuxMTEMemoryRegionTestCase(TestBase):
15
16    NO_DEBUG_INFO_TESTCASE = True
17
18    @skipUnlessArch("aarch64")
19    @skipUnlessPlatform(["linux"])
20    @skipUnlessAArch64MTELinuxCompiler
21    def test_mte_regions(self):
22        if not self.isAArch64MTE():
23            self.skipTest('Target must support MTE.')
24
25        # This test assumes that we have /proc/<PID>/smaps files
26        # that include "VmFlags:" lines.
27        # AArch64 kernel config defaults to enabling smaps with
28        # PROC_PAGE_MONITOR and "VmFlags" was added in kernel 3.8,
29        # before MTE was supported at all.
30
31        self.build()
32        self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
33
34        lldbutil.run_break_set_by_file_and_line(self, "main.c",
35            line_number('main.c', '// Set break point at this line.'),
36            num_expected_locations=1)
37
38        self.runCmd("run", RUN_SUCCEEDED)
39
40        if self.process().GetState() == lldb.eStateExited:
41            self.fail("Test program failed to run.")
42
43        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
44            substrs=['stopped',
45                     'stop reason = breakpoint'])
46
47        substrs = ["memory tagging: enabled"]
48        # The new page will be tagged
49        self.expect("memory region the_page", substrs=substrs)
50        # Code page will not be
51        self.expect("memory region main", substrs=substrs, matching=False)
52