Med Ismail Bennani 1e467e4485
[lldb] Introduce ScriptedFrameProvider for real threads (#161870)
This patch extends ScriptedFrame to work with real (non-scripted)
threads,
enabling frame providers to synthesize frames for native processes.

Previously, ScriptedFrame only worked within
ScriptedProcess/ScriptedThread
contexts. This patch decouples ScriptedFrame from ScriptedThread,
allowing
users to augment or replace stack frames in real debugging sessions for
use
cases like custom calling conventions, reconstructing corrupted frames
from
core files, or adding diagnostic frames.

Key changes:

- ScriptedFrame::Create() now accepts ThreadSP instead of requiring
ScriptedThread, extracting architecture from the target triple rather
than ScriptedProcess.arch

- Added SBTarget::RegisterScriptedFrameProvider() and
ClearScriptedFrameProvider() APIs, with Target storing a
SyntheticFrameProviderDescriptor template for new threads

- Added "target frame-provider register/clear" commands for CLI access

- Thread class gains LoadScriptedFrameProvider(),
ClearScriptedFrameProvider(),
and GetFrameProvider() methods for per-thread frame provider management

- New SyntheticStackFrameList overrides FetchFramesUpTo() to lazily
provide
frames from either the frame provider or the real stack

This enables practical use of the SyntheticFrameProvider infrastructure
in
real debugging workflows.

rdar://161834688

Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>

Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
2025-11-11 20:18:45 +00:00

366 lines
11 KiB
C++

//===-- PythonTestSuite.cpp -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "gtest/gtest.h"
#include "Plugins/ScriptInterpreter/Python/SWIGPythonBridge.h"
#include "Plugins/ScriptInterpreter/Python/lldb-python.h"
#include "PythonTestSuite.h"
#include <optional>
void PythonTestSuite::SetUp() {
// Although we don't care about concurrency for the purposes of running
// this test suite, Python requires the GIL to be locked even for
// deallocating memory, which can happen when you call Py_DECREF or
// Py_INCREF. So acquire the GIL for the entire duration of this
// test suite.
Py_InitializeEx(0);
m_gil_state = PyGILState_Ensure();
python::RunSimpleString("import sys");
}
void PythonTestSuite::TearDown() {
PyGILState_Release(m_gil_state);
// We could call Py_FinalizeEx here, but initializing and finalizing Python is
// pretty slow, so just keep Python initialized across tests.
}
// The following functions are the Pythonic implementations of the required
// callbacks. Because they're defined in libLLDB which we cannot link for the
// unit test, we have a 'default' implementation here.
extern "C" PyObject *PyInit__lldb(void) { return nullptr; }
llvm::Expected<bool>
lldb_private::python::SWIGBridge::LLDBSwigPythonBreakpointCallbackFunction(
const char *python_function_name, const char *session_dictionary_name,
const lldb::StackFrameSP &sb_frame,
const lldb::BreakpointLocationSP &sb_bp_loc,
const StructuredDataImpl &args_impl) {
return false;
}
bool lldb_private::python::SWIGBridge::LLDBSwigPythonWatchpointCallbackFunction(
const char *python_function_name, const char *session_dictionary_name,
const lldb::StackFrameSP &sb_frame, const lldb::WatchpointSP &sb_wp) {
return false;
}
bool lldb_private::python::SWIGBridge::LLDBSwigPythonFormatterCallbackFunction(
const char *python_function_name, const char *session_dictionary_name,
lldb::TypeImplSP type_impl_sp) {
return false;
}
bool lldb_private::python::SWIGBridge::LLDBSwigPythonCallTypeScript(
const char *python_function_name, const void *session_dictionary,
const lldb::ValueObjectSP &valobj_sp, void **pyfunct_wrapper,
const lldb::TypeSummaryOptionsSP &options_sp, std::string &retval) {
return false;
}
python::PythonObject
lldb_private::python::SWIGBridge::LLDBSwigPythonCreateSyntheticProvider(
const char *python_class_name, const char *session_dictionary_name,
const lldb::ValueObjectSP &valobj_sp) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::LLDBSwigPythonCreateCommandObject(
const char *python_class_name, const char *session_dictionary_name,
lldb::DebuggerSP debugger_sp) {
return python::PythonObject();
}
size_t lldb_private::python::SWIGBridge::LLDBSwigPython_CalculateNumChildren(
PyObject *implementor, uint32_t max) {
return 0;
}
PyObject *lldb_private::python::SWIGBridge::LLDBSwigPython_GetChildAtIndex(
PyObject *implementor, uint32_t idx) {
return nullptr;
}
uint32_t
lldb_private::python::SWIGBridge::LLDBSwigPython_GetIndexOfChildWithName(
PyObject *implementor, const char *child_name) {
return 0;
}
void *
lldb_private::python::LLDBSWIGPython_CastPyObjectToSBData(PyObject *data) {
return nullptr;
}
void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBBreakpoint(
PyObject *data) {
return nullptr;
}
void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBBreakpointLocation(
PyObject *data) {
return nullptr;
}
void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBAttachInfo(
PyObject *data) {
return nullptr;
}
void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBLaunchInfo(
PyObject *data) {
return nullptr;
}
void *
lldb_private::python::LLDBSWIGPython_CastPyObjectToSBError(PyObject *data) {
return nullptr;
}
void *
lldb_private::python::LLDBSWIGPython_CastPyObjectToSBEvent(PyObject *data) {
return nullptr;
}
void *
lldb_private::python::LLDBSWIGPython_CastPyObjectToSBStream(PyObject *data) {
return nullptr;
}
void *
lldb_private::python::LLDBSWIGPython_CastPyObjectToSBThread(PyObject *data) {
return nullptr;
}
void *
lldb_private::python::LLDBSWIGPython_CastPyObjectToSBFrame(PyObject *data) {
return nullptr;
}
void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBSymbolContext(
PyObject *data) {
return nullptr;
}
void *
lldb_private::python::LLDBSWIGPython_CastPyObjectToSBValue(PyObject *data) {
return nullptr;
}
void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBMemoryRegionInfo(
PyObject *data) {
return nullptr;
}
void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBExecutionContext(
PyObject *data) {
return nullptr;
}
void *
lldb_private::python::LLDBSWIGPython_CastPyObjectToSBFrameList(PyObject *data) {
return nullptr;
}
lldb::ValueObjectSP
lldb_private::python::SWIGBridge::LLDBSWIGPython_GetValueObjectSPFromSBValue(
void *data) {
return nullptr;
}
bool lldb_private::python::SWIGBridge::
LLDBSwigPython_UpdateSynthProviderInstance(PyObject *implementor) {
return false;
}
bool lldb_private::python::SWIGBridge::
LLDBSwigPython_MightHaveChildrenSynthProviderInstance(
PyObject *implementor) {
return false;
}
PyObject *
lldb_private::python::SWIGBridge::LLDBSwigPython_GetValueSynthProviderInstance(
PyObject *implementor) {
return nullptr;
}
bool lldb_private::python::SWIGBridge::LLDBSwigPythonCallCommand(
const char *python_function_name, const char *session_dictionary_name,
lldb::DebuggerSP debugger, const char *args,
lldb_private::CommandReturnObject &cmd_retobj,
lldb::ExecutionContextRefSP exe_ctx_ref_sp) {
return false;
}
bool lldb_private::python::SWIGBridge::LLDBSwigPythonCallCommandObject(
PyObject *implementor, lldb::DebuggerSP debugger, const char *args,
lldb_private::CommandReturnObject &cmd_retobj,
lldb::ExecutionContextRefSP exe_ctx_ref_sp) {
return false;
}
bool lldb_private::python::SWIGBridge::LLDBSwigPythonCallParsedCommandObject(
PyObject *implementor, lldb::DebuggerSP debugger,
StructuredDataImpl &args_impl,
lldb_private::CommandReturnObject &cmd_retobj,
lldb::ExecutionContextRefSP exe_ctx_ref_sp) {
return false;
}
std::optional<std::string>
LLDBSwigPythonGetRepeatCommandForScriptedCommand(PyObject *implementor,
std::string &command) {
return std::nullopt;
}
StructuredData::DictionarySP
LLDBSwigPythonHandleArgumentCompletionForScriptedCommand(
PyObject *implementor, std::vector<llvm::StringRef> &args, size_t args_pos,
size_t pos_in_arg) {
return {};
}
StructuredData::DictionarySP
LLDBSwigPythonHandleOptionArgumentCompletionForScriptedCommand(
PyObject *implementor, llvm::StringRef &long_options, size_t char_in_arg) {
return {};
}
bool lldb_private::python::SWIGBridge::LLDBSwigPythonCallModuleInit(
const char *python_module_name, const char *session_dictionary_name,
lldb::DebuggerSP debugger) {
return false;
}
bool lldb_private::python::SWIGBridge::LLDBSwigPythonCallModuleNewTarget(
const char *python_module_name, const char *session_dictionary_name,
lldb::TargetSP target) {
return false;
}
python::PythonObject
lldb_private::python::SWIGBridge::LLDBSWIGPythonCreateOSPlugin(
const char *python_class_name, const char *session_dictionary_name,
const lldb::ProcessSP &process_sp) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::LLDBSWIGPython_CreateFrameRecognizer(
const char *python_class_name, const char *session_dictionary_name) {
return python::PythonObject();
}
PyObject *
lldb_private::python::SWIGBridge::LLDBSwigPython_GetRecognizedArguments(
PyObject *implementor, const lldb::StackFrameSP &frame_sp) {
return nullptr;
}
bool lldb_private::python::SWIGBridge::LLDBSWIGPythonRunScriptKeywordProcess(
const char *python_function_name, const char *session_dictionary_name,
const lldb::ProcessSP &process, std::string &output) {
return false;
}
std::optional<std::string>
lldb_private::python::SWIGBridge::LLDBSWIGPythonRunScriptKeywordThread(
const char *python_function_name, const char *session_dictionary_name,
lldb::ThreadSP thread) {
return std::nullopt;
}
bool lldb_private::python::SWIGBridge::LLDBSWIGPythonRunScriptKeywordTarget(
const char *python_function_name, const char *session_dictionary_name,
const lldb::TargetSP &target, std::string &output) {
return false;
}
std::optional<std::string>
lldb_private::python::SWIGBridge::LLDBSWIGPythonRunScriptKeywordFrame(
const char *python_function_name, const char *session_dictionary_name,
lldb::StackFrameSP frame) {
return std::nullopt;
}
bool lldb_private::python::SWIGBridge::LLDBSWIGPythonRunScriptKeywordValue(
const char *python_function_name, const char *session_dictionary_name,
const lldb::ValueObjectSP &value, std::string &output) {
return false;
}
void *lldb_private::python::SWIGBridge::LLDBSWIGPython_GetDynamicSetting(
void *module, const char *setting, const lldb::TargetSP &target_sp) {
return nullptr;
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(Status &&status) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(lldb::ProcessAttachInfoSP) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(lldb::ProcessLaunchInfoSP) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(lldb::DataExtractorSP) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(lldb::ExecutionContextRefSP) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(lldb::ThreadPlanSP) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(lldb::ProcessSP) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(lldb::StackFrameListSP) {
return python::PythonObject();
}
python::PythonObject lldb_private::python::SWIGBridge::ToSWIGWrapper(
const lldb_private::StructuredDataImpl &) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(Event *event) {
return python::PythonObject();
}
python::PythonObject
lldb_private::python::SWIGBridge::ToSWIGWrapper(const Stream *stream) {
return python::PythonObject();
}
python::PythonObject lldb_private::python::SWIGBridge::ToSWIGWrapper(
std::shared_ptr<lldb::SBStream> stream_sb) {
return python::PythonObject();
}