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"""
Test python scripted process in lldb
"""
import os, json, tempfile
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
from lldbsuite.test import lldbtest
class StackCoreScriptedProcesTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
def create_stack_skinny_corefile(self, file):
self.build()
target, process, thread, _ = lldbutil.run_to_source_breakpoint(self, "// break here",
lldb.SBFileSpec("baz.cpp"))
self.assertTrue(process.IsValid(), "Process is invalid.")
# FIXME: Use SBAPI to save the process corefile.
self.runCmd("process save-core -s stack " + file)
self.assertTrue(os.path.exists(file), "No stack-only corefile found.")
self.assertTrue(self.dbg.DeleteTarget(target), "Couldn't delete target")
def get_module_with_name(self, target, name):
for module in target.modules:
if name in module.GetFileSpec().GetFilename():
return module
return None
@skipUnlessDarwin
@skipIfOutOfTreeDebugserver
@skipIfRemote
def test_launch_scripted_process_stack_frames(self):
"""Test that we can launch an lldb scripted process from the command
line, check its process ID and read string from memory."""
self.build()
target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
self.assertTrue(target, VALID_TARGET)
main_module = self.get_module_with_name(target, 'a.out')
self.assertTrue(main_module, "Invalid main module.")
error = target.SetModuleLoadAddress(main_module, 0)
self.assertSuccess(error, "Reloading main module at offset 0 failed.")
scripted_dylib = self.get_module_with_name(target, 'libbaz.dylib')
self.assertTrue(scripted_dylib, "Dynamic library libbaz.dylib not found.")
self.assertEqual(scripted_dylib.GetObjectFileHeaderAddress().GetLoadAddress(target), 0xffffffffffffffff)
os.environ['SKIP_SCRIPTED_PROCESS_LAUNCH'] = '1'
def cleanup():
del os.environ["SKIP_SCRIPTED_PROCESS_LAUNCH"]
self.addTearDownHook(cleanup)
scripted_process_example_relpath = 'stack_core_scripted_process.py'
self.runCmd("command script import " + os.path.join(self.getSourceDir(),
scripted_process_example_relpath))
corefile_process = None
with tempfile.NamedTemporaryFile() as file:
self.create_stack_skinny_corefile(file.name)
corefile_target = self.dbg.CreateTarget(None)
corefile_process = corefile_target.LoadCore(self.getBuildArtifact(file.name))
self.assertTrue(corefile_process, PROCESS_IS_VALID)
structured_data = lldb.SBStructuredData()
structured_data.SetFromJSON(json.dumps({
"backing_target_idx" : self.dbg.GetIndexOfTarget(corefile_process.GetTarget()),
"libbaz_path" : self.getBuildArtifact("libbaz.dylib")
}))
launch_info = lldb.SBLaunchInfo(None)
launch_info.SetProcessPluginName("ScriptedProcess")
launch_info.SetScriptedProcessClassName("stack_core_scripted_process.StackCoreScriptedProcess")
launch_info.SetScriptedProcessDictionary(structured_data)
error = lldb.SBError()
process = target.Launch(launch_info, error)
self.assertSuccess(error)
self.assertTrue(process, PROCESS_IS_VALID)
self.assertEqual(process.GetProcessID(), 42)
self.assertEqual(process.GetNumThreads(), 2)
thread = process.GetSelectedThread()
self.assertTrue(thread, "Invalid thread.")
self.assertEqual(thread.GetName(), "StackCoreScriptedThread.thread-1")
self.assertTrue(target.triple, "Invalid target triple")
arch = target.triple.split('-')[0]
supported_arch = ['x86_64', 'arm64', 'arm64e']
self.assertIn(arch, supported_arch)
# When creating a corefile of a arm process, lldb saves the exception
# that triggers the breakpoint in the LC_NOTES of the corefile, so they
# can be reloaded with the corefile on the next debug session.
if arch in 'arm64e':
self.assertTrue(thread.GetStopReason(), lldb.eStopReasonException)
# However, it's architecture specific, and corefiles made from intel
# process don't save any metadata to retrieve to stop reason.
# To mitigate this, the StackCoreScriptedProcess will report a
# eStopReasonSignal with a SIGTRAP, mimicking what debugserver does.
else:
self.assertTrue(thread.GetStopReason(), lldb.eStopReasonSignal)
self.assertEqual(thread.GetNumFrames(), 5)
frame = thread.GetSelectedFrame()
self.assertTrue(frame, "Invalid frame.")
func = frame.GetFunction()
self.assertTrue(func, "Invalid function.")
self.assertIn("baz", frame.GetFunctionName())
self.assertGreater(frame.vars.GetSize(), 0)
self.assertEqual(int(frame.vars.GetFirstValueByName('k').GetValue()), 42)
self.assertEqual(int(frame.vars.GetFirstValueByName('j').Dereference().GetValue()), 42 * 42)
corefile_dylib = self.get_module_with_name(corefile_target, 'libbaz.dylib')
self.assertTrue(corefile_dylib, "Dynamic library libbaz.dylib not found.")
scripted_dylib = self.get_module_with_name(target, 'libbaz.dylib')
self.assertTrue(scripted_dylib, "Dynamic library libbaz.dylib not found.")
self.assertEqual(scripted_dylib.GetObjectFileHeaderAddress().GetLoadAddress(target),
corefile_dylib.GetObjectFileHeaderAddress().GetLoadAddress(target))
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