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"""
Test basics of mini dump debugging.
"""
from __future__ import print_function
from six import iteritems
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class MiniDumpTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
NO_DEBUG_INFO_TESTCASE = True
def test_process_info_in_mini_dump(self):
"""Test that lldb can read the process information from the minidump."""
# target create -c fizzbuzz_no_heap.dmp
self.dbg.CreateTarget("")
self.target = self.dbg.GetSelectedTarget()
self.process = self.target.LoadCore("fizzbuzz_no_heap.dmp")
self.assertTrue(self.process, PROCESS_IS_VALID)
self.assertEqual(self.process.GetNumThreads(), 1)
self.assertEqual(self.process.GetProcessID(), 4440)
def test_thread_info_in_mini_dump(self):
"""Test that lldb can read the thread information from the minidump."""
# target create -c fizzbuzz_no_heap.dmp
self.dbg.CreateTarget("")
self.target = self.dbg.GetSelectedTarget()
self.process = self.target.LoadCore("fizzbuzz_no_heap.dmp")
# This process crashed due to an access violation (0xc0000005) in its
# one and only thread.
self.assertEqual(self.process.GetNumThreads(), 1)
thread = self.process.GetThreadAtIndex(0)
self.assertEqual(thread.GetStopReason(), lldb.eStopReasonException)
stop_description = thread.GetStopDescription(256)
self.assertTrue("0xc0000005" in stop_description)
def test_stack_info_in_mini_dump(self):
"""Test that we can see a trivial stack in a VS-generate mini dump."""
# target create -c fizzbuzz_no_heap.dmp
self.dbg.CreateTarget("")
self.target = self.dbg.GetSelectedTarget()
self.process = self.target.LoadCore("fizzbuzz_no_heap.dmp")
self.assertEqual(self.process.GetNumThreads(), 1)
thread = self.process.GetThreadAtIndex(0)
# The crash is in main, so there should be one frame on the stack.
self.assertEqual(thread.GetNumFrames(), 1)
frame = thread.GetFrameAtIndex(0)
self.assertTrue(frame.IsValid())
pc = frame.GetPC()
eip = frame.FindRegister("pc")
self.assertTrue(eip.IsValid())
self.assertEqual(pc, eip.GetValueAsUnsigned())
@skipUnlessWindows # Minidump saving works only on windows
def test_deeper_stack_in_mini_dump(self):
"""Test that we can examine a more interesting stack in a mini dump."""
self.build()
exe = os.path.join(os.getcwd(), "a.out")
core = os.path.join(os.getcwd(), "core.dmp")
try:
# Set a breakpoint and capture a mini dump.
target = self.dbg.CreateTarget(exe)
breakpoint = target.BreakpointCreateByName("bar")
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
self.assertEqual(process.GetState(), lldb.eStateStopped)
self.assertTrue(process.SaveCore(core))
self.assertTrue(os.path.isfile(core))
self.assertTrue(process.Kill().Success())
# Launch with the mini dump, and inspect the stack.
target = self.dbg.CreateTarget(None)
process = target.LoadCore(core)
thread = process.GetThreadAtIndex(0)
expected_stack = {0: 'bar', 1: 'foo', 2: 'main'}
self.assertGreaterEqual(thread.GetNumFrames(), len(expected_stack))
for index, name in iteritems(expected_stack):
frame = thread.GetFrameAtIndex(index)
self.assertTrue(frame.IsValid())
function_name = frame.GetFunctionName()
self.assertTrue(name in function_name)
finally:
# Clean up the mini dump file.
self.assertTrue(self.dbg.DeleteTarget(target))
if (os.path.isfile(core)):
os.unlink(core)
@skipUnlessWindows # Minidump saving works only on windows
def test_local_variables_in_mini_dump(self):
"""Test that we can examine local variables in a mini dump."""
self.build()
exe = os.path.join(os.getcwd(), "a.out")
core = os.path.join(os.getcwd(), "core.dmp")
try:
# Set a breakpoint and capture a mini dump.
target = self.dbg.CreateTarget(exe)
breakpoint = target.BreakpointCreateByName("bar")
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
self.assertEqual(process.GetState(), lldb.eStateStopped)
self.assertTrue(process.SaveCore(core))
self.assertTrue(os.path.isfile(core))
self.assertTrue(process.Kill().Success())
# Launch with the mini dump, and inspect a local variable.
target = self.dbg.CreateTarget(None)
process = target.LoadCore(core)
thread = process.GetThreadAtIndex(0)
frame = thread.GetFrameAtIndex(0)
value = frame.EvaluateExpression('x')
self.assertEqual(value.GetValueAsSigned(), 3)
finally:
# Clean up the mini dump file.
self.assertTrue(self.dbg.DeleteTarget(target))
if (os.path.isfile(core)):
os.unlink(core)
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