1import os
2import struct
3import subprocess
4
5import lldb
6from lldbsuite.test.decorators import *
7from lldbsuite.test.lldbtest import *
8from lldbsuite.test import lldbutil
9
10
11class FreeBSDKernelVMCoreTestCase(TestBase):
12    NO_DEBUG_INFO_TESTCASE = True
13
14    def test_mem(self):
15        kernel_exec = "/boot/kernel/kernel"
16        mem_device = "/dev/mem"
17
18        if not os.access(kernel_exec, os.R_OK):
19            self.skipTest("Kernel @ %s is not readable" % (kernel_exec,))
20        if not os.access(mem_device, os.R_OK):
21            self.skipTest("Memory @ %s is not readable" % (mem_device,))
22
23        target = self.dbg.CreateTarget(kernel_exec)
24        process = target.LoadCore(mem_device)
25        hz_value = int(subprocess.check_output(["sysctl", "-n", "kern.hz"]))
26
27        self.assertTrue(process, PROCESS_IS_VALID)
28        self.assertEqual(process.GetNumThreads(), 1)
29        self.assertEqual(process.GetProcessID(), 0)
30
31        # test memory reading
32        self.expect("expr -- *(int *) &hz",
33                    substrs=["(int) $0 = %d" % hz_value])
34
35        main_mod = target.GetModuleAtIndex(0)
36        hz_addr = (main_mod.FindSymbols("hz")[0].symbol.addr
37                   .GetLoadAddress(target))
38        error = lldb.SBError()
39        self.assertEqual(process.ReadMemory(hz_addr, 4, error),
40                         struct.pack("<I", hz_value))
41
42        self.dbg.DeleteTarget(target)
43