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", 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) 42