fb785877a9
Introduce initial support for using libkvm on FreeBSD. The library
can be used as an alternate implementation for processing kernel
coredumps but it can also be used to access live kernel memory through
specifying "/dev/mem" as the core file, i.e.:
lldb --core /dev/mem /boot/kernel/kernel
Differential Revision: https://reviews.llvm.org/D116005
45 lines
1.4 KiB
Python
45 lines
1.4 KiB
Python
import os
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import struct
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import subprocess
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class FreeBSDKernelVMCoreTestCase(TestBase):
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NO_DEBUG_INFO_TESTCASE = True
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mydir = TestBase.compute_mydir(__file__)
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def test_mem(self):
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kernel_exec = "/boot/kernel/kernel"
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mem_device = "/dev/mem"
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if not os.access(kernel_exec, os.R_OK):
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self.skipTest("Kernel @ %s is not readable" % (kernel_exec,))
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if not os.access(mem_device, os.R_OK):
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self.skipTest("Memory @ %s is not readable" % (mem_device,))
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target = self.dbg.CreateTarget(kernel_exec)
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process = target.LoadCore(mem_device)
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hz_value = int(subprocess.check_output(["sysctl", "-n", "kern.hz"]))
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self.assertTrue(process, PROCESS_IS_VALID)
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self.assertEqual(process.GetNumThreads(), 1)
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self.assertEqual(process.GetProcessID(), 0)
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# test memory reading
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self.expect("expr -- *(int *) &hz",
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substrs=["(int) $0 = %d" % hz_value])
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main_mod = target.GetModuleAtIndex(0)
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hz_addr = (main_mod.FindSymbols("hz")[0].symbol.addr
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.GetLoadAddress(target))
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error = lldb.SBError()
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self.assertEqual(process.ReadMemory(hz_addr, 4, error),
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struct.pack("<I", hz_value))
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self.dbg.DeleteTarget(target)
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