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//===-- ThreadPlanPython.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 "lldb/Target/ThreadPlan.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/Interfaces/ScriptedThreadPlanInterface.h"
#include "lldb/Interpreter/ScriptInterpreter.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadPlan.h"
#include "lldb/Target/ThreadPlanPython.h"
#include "lldb/Utility/LLDBLog.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/State.h"
using namespace lldb;
using namespace lldb_private;
// ThreadPlanPython
ThreadPlanPython::ThreadPlanPython(Thread &thread, const char *class_name,
const StructuredDataImpl &args_data)
: ThreadPlan(ThreadPlan::eKindPython, "Python based Thread Plan", thread,
eVoteNoOpinion, eVoteNoOpinion),
m_class_name(class_name), m_args_data(args_data), m_did_push(false),
m_stop_others(false) {
ScriptInterpreter *interpreter = GetScriptInterpreter();
if (!interpreter) {
SetPlanComplete(false);
// FIXME: error handling
// error.SetErrorStringWithFormat(
// "ThreadPlanPython::%s () - ERROR: %s", __FUNCTION__,
// "Couldn't get script interpreter");
return;
}
m_interface = interpreter->CreateScriptedThreadPlanInterface();
if (!m_interface) {
SetPlanComplete(false);
// FIXME: error handling
// error.SetErrorStringWithFormat(
// "ThreadPlanPython::%s () - ERROR: %s", __FUNCTION__,
// "Script interpreter couldn't create Scripted Thread Plan Interface");
return;
}
SetIsControllingPlan(true);
SetOkayToDiscard(true);
SetPrivate(false);
}
bool ThreadPlanPython::ValidatePlan(Stream *error) {
if (!m_did_push)
return true;
if (!m_implementation_sp) {
if (error)
error->Printf("Error constructing Python ThreadPlan: %s",
m_error_str.empty() ? "<unknown error>"
: m_error_str.c_str());
return false;
}
return true;
}
ScriptInterpreter *ThreadPlanPython::GetScriptInterpreter() {
return m_process.GetTarget().GetDebugger().GetScriptInterpreter();
}
void ThreadPlanPython::DidPush() {
// We set up the script side in DidPush, so that it can push other plans in
// the constructor, and doesn't have to care about the details of DidPush.
m_did_push = true;
if (m_interface) {
auto obj_or_err = m_interface->CreatePluginObject(
m_class_name, this->shared_from_this(), m_args_data);
if (!obj_or_err) {
m_error_str = llvm::toString(obj_or_err.takeError());
SetPlanComplete(false);
} else
m_implementation_sp = *obj_or_err;
}
}
bool ThreadPlanPython::ShouldStop(Event *event_ptr) {
Log *log = GetLog(LLDBLog::Thread);
LLDB_LOGF(log, "%s called on Python Thread Plan: %s )", LLVM_PRETTY_FUNCTION,
m_class_name.c_str());
bool should_stop = true;
if (m_implementation_sp) {
auto should_stop_or_err = m_interface->ShouldStop(event_ptr);
if (!should_stop_or_err) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Thread), should_stop_or_err.takeError(),
"Can't call ScriptedThreadPlan::ShouldStop.");
SetPlanComplete(false);
} else
should_stop = *should_stop_or_err;
}
return should_stop;
}
bool ThreadPlanPython::IsPlanStale() {
Log *log = GetLog(LLDBLog::Thread);
LLDB_LOGF(log, "%s called on Python Thread Plan: %s )", LLVM_PRETTY_FUNCTION,
m_class_name.c_str());
bool is_stale = true;
if (m_implementation_sp) {
auto is_stale_or_err = m_interface->IsStale();
if (!is_stale_or_err) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Thread), is_stale_or_err.takeError(),
"Can't call ScriptedThreadPlan::IsStale.");
SetPlanComplete(false);
} else
is_stale = *is_stale_or_err;
}
return is_stale;
}
bool ThreadPlanPython::DoPlanExplainsStop(Event *event_ptr) {
Log *log = GetLog(LLDBLog::Thread);
LLDB_LOGF(log, "%s called on Python Thread Plan: %s )", LLVM_PRETTY_FUNCTION,
m_class_name.c_str());
bool explains_stop = true;
if (m_implementation_sp) {
auto explains_stop_or_error = m_interface->ExplainsStop(event_ptr);
if (!explains_stop_or_error) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Thread),
explains_stop_or_error.takeError(),
"Can't call ScriptedThreadPlan::ExplainsStop.");
SetPlanComplete(false);
} else
explains_stop = *explains_stop_or_error;
}
return explains_stop;
}
bool ThreadPlanPython::MischiefManaged() {
Log *log = GetLog(LLDBLog::Thread);
LLDB_LOGF(log, "%s called on Python Thread Plan: %s )", LLVM_PRETTY_FUNCTION,
m_class_name.c_str());
bool mischief_managed = true;
if (m_implementation_sp) {
// I don't really need mischief_managed, since it's simpler to just call
// SetPlanComplete in should_stop.
mischief_managed = IsPlanComplete();
if (mischief_managed) {
// We need to cache the stop reason here we'll need it in GetDescription.
GetDescription(&m_stop_description, eDescriptionLevelBrief);
m_implementation_sp.reset();
}
}
return mischief_managed;
}
lldb::StateType ThreadPlanPython::GetPlanRunState() {
Log *log = GetLog(LLDBLog::Thread);
LLDB_LOGF(log, "%s called on Python Thread Plan: %s )", LLVM_PRETTY_FUNCTION,
m_class_name.c_str());
lldb::StateType run_state = eStateRunning;
if (m_implementation_sp)
run_state = m_interface->GetRunState();
return run_state;
}
void ThreadPlanPython::GetDescription(Stream *s, lldb::DescriptionLevel level) {
Log *log = GetLog(LLDBLog::Thread);
LLDB_LOGF(log, "%s called on Python Thread Plan: %s )", LLVM_PRETTY_FUNCTION,
m_class_name.c_str());
if (m_implementation_sp) {
ScriptInterpreter *script_interp = GetScriptInterpreter();
if (script_interp) {
lldb::StreamSP stream = std::make_shared<lldb_private::StreamString>();
llvm::Error err = m_interface->GetStopDescription(stream);
if (err) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Thread), std::move(err),
"Can't call ScriptedThreadPlan::GetStopDescription.");
s->Printf("Python thread plan implemented by class %s.",
m_class_name.c_str());
} else
s->PutCString(
reinterpret_cast<StreamString *>(stream.get())->GetData());
}
return;
}
// It's an error not to have a description, so if we get here, we should
// add something.
if (m_stop_description.Empty())
s->Printf("Python thread plan implemented by class %s.",
m_class_name.c_str());
s->PutCString(m_stop_description.GetData());
}
// The ones below are not currently exported to Python.
bool ThreadPlanPython::WillStop() {
Log *log = GetLog(LLDBLog::Thread);
LLDB_LOGF(log, "%s called on Python Thread Plan: %s )", LLVM_PRETTY_FUNCTION,
m_class_name.c_str());
return true;
}
bool ThreadPlanPython::DoWillResume(lldb::StateType resume_state,
bool current_plan) {
m_stop_description.Clear();
return true;
}
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