lldb/test/API/functionalities/postmortem/FreeBSDKernel/TestFreeBSDKernelLive.py

   1 import os
   2 import struct
   3 import subprocess
   4
   5 import lldb
   6 from lldbsuite.test.decorators import *
   7 from lldbsuite.test.lldbtest import *
   8 from lldbsuite.test import lldbutil
   9
  10
  11 class 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", substrs=["(int) $0 = %d" % hz_value])
  33
  34         main_mod = target.GetModuleAtIndex(0)
  35         hz_addr = main_mod.FindSymbols("hz")[0].symbol.addr.GetLoadAddress(target)
  36         error = lldb.SBError()
  37         self.assertEqual(
  38             process.ReadMemory(hz_addr, 4, error), struct.pack("<I", hz_value)
  39         )
  40
  41         self.dbg.DeleteTarget(target)