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Diffstat (limited to 'packages/Python/lldbsuite/test/functionalities/postmortem/linux-core/TestLinuxCore.py')
| -rw-r--r-- | packages/Python/lldbsuite/test/functionalities/postmortem/linux-core/TestLinuxCore.py | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/functionalities/postmortem/linux-core/TestLinuxCore.py b/packages/Python/lldbsuite/test/functionalities/postmortem/linux-core/TestLinuxCore.py new file mode 100644 index 000000000000..fd5bb00d0565 --- /dev/null +++ b/packages/Python/lldbsuite/test/functionalities/postmortem/linux-core/TestLinuxCore.py @@ -0,0 +1,164 @@ +""" +Test basics of linux core file debugging. +""" + +from __future__ import print_function + +import shutil +import struct + +import lldb +from lldbsuite.test.decorators import * +from lldbsuite.test.lldbtest import * +from lldbsuite.test import lldbutil + +class LinuxCoreTestCase(TestBase): + NO_DEBUG_INFO_TESTCASE = True + + mydir = TestBase.compute_mydir(__file__) + + _i386_pid = 32306 + _x86_64_pid = 32259 + _s390x_pid = 1045 + + _i386_regions = 4 + _x86_64_regions = 5 + _s390x_regions = 2 + + @skipIf(bugnumber="llvm.org/pr26947") + def test_i386(self): + """Test that lldb can read the process information from an i386 linux core file.""" + self.do_test("i386", self._i386_pid, self._i386_regions) + + def test_x86_64(self): + """Test that lldb can read the process information from an x86_64 linux core file.""" + self.do_test("x86_64", self._x86_64_pid, self._x86_64_regions) + + # This seems to hang on non-s390x platforms for some reason. Disabling for now. + @skipIf(archs=no_match(['s390x'])) + def test_s390x(self): + """Test that lldb can read the process information from an s390x linux core file.""" + self.do_test("s390x", self._s390x_pid, self._s390x_regions) + + def test_same_pid_running(self): + """Test that we read the information from the core correctly even if we have a running + process with the same PID around""" + try: + shutil.copyfile("x86_64.out", "x86_64-pid.out") + shutil.copyfile("x86_64.core", "x86_64-pid.core") + with open("x86_64-pid.core", "r+b") as f: + # These are offsets into the NT_PRSTATUS and NT_PRPSINFO structures in the note + # segment of the core file. If you update the file, these offsets may need updating + # as well. (Notes can be viewed with readelf --notes.) + for pid_offset in [0x1c4, 0x320]: + f.seek(pid_offset) + self.assertEqual(struct.unpack("<I", f.read(4))[0], self._x86_64_pid) + + # We insert our own pid, and make sure the test still works. + f.seek(pid_offset) + f.write(struct.pack("<I", os.getpid())) + self.do_test("x86_64-pid", os.getpid(), self._x86_64_regions) + finally: + self.RemoveTempFile("x86_64-pid.out") + self.RemoveTempFile("x86_64-pid.core") + + def test_two_cores_same_pid(self): + """Test that we handle the situation if we have two core files with the same PID + around""" + alttarget = self.dbg.CreateTarget("altmain.out") + altprocess = alttarget.LoadCore("altmain.core") + self.assertTrue(altprocess, PROCESS_IS_VALID) + self.assertEqual(altprocess.GetNumThreads(), 1) + self.assertEqual(altprocess.GetProcessID(), self._x86_64_pid) + + altframe = altprocess.GetSelectedThread().GetFrameAtIndex(0) + self.assertEqual(altframe.GetFunctionName(), "_start") + self.assertEqual(altframe.GetLineEntry().GetLine(), line_number("altmain.c", "Frame _start")) + + error = lldb.SBError() + F = altprocess.ReadCStringFromMemory(altframe.FindVariable("F").GetValueAsUnsigned(), 256, error) + self.assertTrue(error.Success()) + self.assertEqual(F, "_start") + + # without destroying this process, run the test which opens another core file with the + # same pid + self.do_test("x86_64", self._x86_64_pid, self._x86_64_regions) + + def check_memory_regions(self, process, region_count): + region_list = process.GetMemoryRegions() + self.assertEqual(region_list.GetSize(), region_count) + + region = lldb.SBMemoryRegionInfo() + + # Check we have the right number of regions. + self.assertEqual(region_list.GetSize(), region_count); + + # Check that getting a region beyond the last in the list fails. + self.assertFalse(region_list.GetMemoryRegionAtIndex(region_count, region)); + + # Check each region is valid. + for i in range(region_list.GetSize()): + # Check we can actually get this region. + self.assertTrue(region_list.GetMemoryRegionAtIndex(i, region)) + + #Every region in the list should be mapped. + self.assertTrue(region.IsMapped()) + + # Test the address at the start of a region returns it's enclosing region. + begin_address = region.GetRegionBase() + region_at_begin = lldb.SBMemoryRegionInfo() + error = process.GetMemoryRegionInfo(begin_address, region_at_begin) + self.assertEqual(region, region_at_begin) + + # Test an address in the middle of a region returns it's enclosing region. + middle_address = (region.GetRegionBase() + region.GetRegionEnd()) / 2l + region_at_middle = lldb.SBMemoryRegionInfo() + error = process.GetMemoryRegionInfo(middle_address, region_at_middle) + self.assertEqual(region, region_at_middle) + + # Test the address at the end of a region returns it's enclosing region. + end_address = region.GetRegionEnd() - 1l + region_at_end = lldb.SBMemoryRegionInfo() + error = process.GetMemoryRegionInfo(end_address, region_at_end) + self.assertEqual(region, region_at_end) + + # Check that quering the end address does not return this region but + # the next one. + next_region = lldb.SBMemoryRegionInfo() + error = process.GetMemoryRegionInfo(region.GetRegionEnd(), next_region) + self.assertNotEqual(region, next_region) + self.assertEqual(region.GetRegionEnd(), next_region.GetRegionBase()) + + # Check that query beyond the last region returns an unmapped region + # that ends at LLDB_INVALID_ADDRESS + last_region = lldb.SBMemoryRegionInfo() + region_list.GetMemoryRegionAtIndex(region_count - 1, last_region) + end_region = lldb.SBMemoryRegionInfo() + error = process.GetMemoryRegionInfo(last_region.GetRegionEnd(), end_region) + self.assertFalse(end_region.IsMapped()) + self.assertEqual(last_region.GetRegionEnd(), end_region.GetRegionBase()) + self.assertEqual(end_region.GetRegionEnd(), lldb.LLDB_INVALID_ADDRESS) + + def do_test(self, filename, pid, region_count): + target = self.dbg.CreateTarget(filename + ".out") + process = target.LoadCore(filename + ".core") + self.assertTrue(process, PROCESS_IS_VALID) + self.assertEqual(process.GetNumThreads(), 1) + self.assertEqual(process.GetProcessID(), pid) + + thread = process.GetSelectedThread() + self.assertTrue(thread) + self.assertEqual(thread.GetThreadID(), pid) + backtrace = ["bar", "foo", "_start"] + self.assertEqual(thread.GetNumFrames(), len(backtrace)) + for i in range(len(backtrace)): + frame = thread.GetFrameAtIndex(i) + self.assertTrue(frame) + self.assertEqual(frame.GetFunctionName(), backtrace[i]) + self.assertEqual(frame.GetLineEntry().GetLine(), + line_number("main.c", "Frame " + backtrace[i])) + self.assertEqual(frame.FindVariable("F").GetValueAsUnsigned(), ord(backtrace[i][0])) + + self.check_memory_regions(process, region_count) + + self.dbg.DeleteTarget(target) |