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//===-- AppleThreadPlanStepThroughObjCTrampoline.cpp --------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "AppleThreadPlanStepThroughObjCTrampoline.h"
#include "AppleObjCTrampolineHandler.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Thread.h"
#include "lldb/Expression/ClangExpression.h"
#include "lldb/Expression/ClangFunction.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/ThreadPlanRunToAddress.h"
#include "lldb/Core/Log.h"
using namespace lldb_private;
//----------------------------------------------------------------------
// ThreadPlanStepThroughObjCTrampoline constructor
//----------------------------------------------------------------------
AppleThreadPlanStepThroughObjCTrampoline::AppleThreadPlanStepThroughObjCTrampoline(
Thread &thread,
AppleObjCTrampolineHandler *trampoline_handler,
lldb::addr_t args_addr,
lldb::addr_t object_ptr,
lldb::addr_t class_ptr,
lldb::addr_t sel_ptr,
bool stop_others) :
ThreadPlan (ThreadPlan::eKindGeneric, "MacOSX Step through ObjC Trampoline", thread,
lldb::eVoteNoOpinion, lldb::eVoteNoOpinion),
m_stop_others (stop_others),
m_object_ptr (object_ptr),
m_class_ptr (class_ptr),
m_sel_ptr (sel_ptr),
m_args_addr (args_addr),
m_objc_trampoline_handler (trampoline_handler),
m_impl_function (trampoline_handler->GetLookupImplementationWrapperFunction())
{
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
AppleThreadPlanStepThroughObjCTrampoline::~AppleThreadPlanStepThroughObjCTrampoline()
{
}
void
AppleThreadPlanStepThroughObjCTrampoline::DidPush ()
{
StreamString errors;
ExecutionContext exc_context;
m_thread.CalculateExecutionContext(exc_context);
m_func_sp.reset(m_impl_function->GetThreadPlanToCallFunction (exc_context, m_args_addr, errors, m_stop_others));
m_func_sp->SetPrivate(true);
m_thread.QueueThreadPlan (m_func_sp, false);
}
void
AppleThreadPlanStepThroughObjCTrampoline::GetDescription (Stream *s,
lldb::DescriptionLevel level)
{
if (level == lldb::eDescriptionLevelBrief)
s->Printf("Step through ObjC trampoline");
else
{
s->Printf ("Stepping to implementation of ObjC method - obj: 0x%llx class: 0x%llx selector: 0x%llx",
m_object_ptr, m_class_ptr, m_sel_ptr);
}
}
bool
AppleThreadPlanStepThroughObjCTrampoline::ValidatePlan (Stream *error)
{
return true;
}
bool
AppleThreadPlanStepThroughObjCTrampoline::PlanExplainsStop ()
{
// This plan should actually never stop when it is on the top of the plan
// stack, since it does all it's running in client plans.
return false;
}
lldb::StateType
AppleThreadPlanStepThroughObjCTrampoline::RunState ()
{
return eStateRunning;
}
bool
AppleThreadPlanStepThroughObjCTrampoline::ShouldStop (Event *event_ptr)
{
if (m_func_sp.get() == NULL || m_thread.IsThreadPlanDone(m_func_sp.get()))
{
m_func_sp.reset();
if (!m_run_to_sp)
{
Value target_addr_value;
ExecutionContext exc_context;
m_thread.CalculateExecutionContext(exc_context);
m_impl_function->FetchFunctionResults (exc_context, m_args_addr, target_addr_value);
m_impl_function->DeallocateFunctionResults(exc_context, m_args_addr);
lldb::addr_t target_addr = target_addr_value.GetScalar().ULongLong();
Address target_address(NULL, target_addr);
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP);
if (target_addr == 0)
{
if (log)
log->Printf("Got target implementation of 0x0, stopping.");
SetPlanComplete();
return true;
}
if (log)
log->Printf("Running to ObjC method implementation: 0x%llx", target_addr);
ObjCLanguageRuntime *objc_runtime = GetThread().GetProcess().GetObjCLanguageRuntime();
assert (objc_runtime != NULL);
objc_runtime->AddToMethodCache (m_class_ptr, m_sel_ptr, target_addr);
// Extract the target address from the value:
m_run_to_sp.reset(new ThreadPlanRunToAddress(m_thread, target_address, m_stop_others));
m_thread.QueueThreadPlan(m_run_to_sp, false);
m_run_to_sp->SetPrivate(true);
return false;
}
else if (m_thread.IsThreadPlanDone(m_run_to_sp.get()))
{
SetPlanComplete();
return true;
}
}
return false;
}
// The base class MischiefManaged does some cleanup - so you have to call it
// in your MischiefManaged derived class.
bool
AppleThreadPlanStepThroughObjCTrampoline::MischiefManaged ()
{
if (IsPlanComplete())
return true;
else
return false;
}
bool
AppleThreadPlanStepThroughObjCTrampoline::WillStop()
{
return true;
}
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