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llvm-project/lldb/source/Target/ThreadPlan.cpp

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//===-- ThreadPlan.cpp ------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Target/ThreadPlan.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/State.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/ConvertEnum.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// ThreadPlan constructor
//----------------------------------------------------------------------
ThreadPlan::ThreadPlan(ThreadPlanKind kind, const char *name, Thread &thread, Vote stop_vote, Vote run_vote) :
m_thread (thread),
m_stop_vote (stop_vote),
m_run_vote (run_vote),
m_kind (kind),
m_name (name),
m_plan_complete_mutex (Mutex::eMutexTypeRecursive),
m_cached_plan_explains_stop (eLazyBoolCalculate),
m_plan_complete (false),
m_plan_private (false),
m_okay_to_discard (true),
m_is_master_plan (false),
m_plan_succeeded(true)
{
SetID (GetNextID());
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
ThreadPlan::~ThreadPlan()
{
}
bool
ThreadPlan::PlanExplainsStop (Event *event_ptr)
{
if (m_cached_plan_explains_stop == eLazyBoolCalculate)
{
bool actual_value = DoPlanExplainsStop(event_ptr);
m_cached_plan_explains_stop = actual_value ? eLazyBoolYes : eLazyBoolNo;
return actual_value;
}
else
{
return m_cached_plan_explains_stop == eLazyBoolYes;
}
}
bool
ThreadPlan::IsPlanComplete ()
{
Mutex::Locker locker(m_plan_complete_mutex);
return m_plan_complete;
}
void
ThreadPlan::SetPlanComplete (bool success)
{
Mutex::Locker locker(m_plan_complete_mutex);
m_plan_complete = true;
m_plan_succeeded = success;
}
bool
ThreadPlan::MischiefManaged ()
{
Mutex::Locker locker(m_plan_complete_mutex);
// Mark the plan is complete, but don't override the success flag.
m_plan_complete = true;
return true;
}
Vote
ThreadPlan::ShouldReportStop (Event *event_ptr)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
if (m_stop_vote == eVoteNoOpinion)
{
ThreadPlan *prev_plan = GetPreviousPlan ();
if (prev_plan)
{
Vote prev_vote = prev_plan->ShouldReportStop (event_ptr);
if (log)
log->Printf ("ThreadPlan::ShouldReportStop() returning previous thread plan vote: %s",
GetVoteAsCString (prev_vote));
return prev_vote;
}
}
if (log)
log->Printf ("ThreadPlan::ShouldReportStop() returning vote: %s", GetVoteAsCString (m_stop_vote));
return m_stop_vote;
}
Vote
ThreadPlan::ShouldReportRun (Event *event_ptr)
{
if (m_run_vote == eVoteNoOpinion)
{
ThreadPlan *prev_plan = GetPreviousPlan ();
if (prev_plan)
return prev_plan->ShouldReportRun (event_ptr);
}
return m_run_vote;
}
bool
ThreadPlan::StopOthers ()
{
ThreadPlan *prev_plan;
prev_plan = GetPreviousPlan ();
if (prev_plan == NULL)
return false;
else
return prev_plan->StopOthers();
}
void
ThreadPlan::SetStopOthers (bool new_value)
{
// SetStopOthers doesn't work up the hierarchy. You have to set the
// explicit ThreadPlan you want to affect.
}
bool
ThreadPlan::WillResume (StateType resume_state, bool current_plan)
{
m_cached_plan_explains_stop = eLazyBoolCalculate;
if (current_plan)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
if (log)
{
RegisterContext *reg_ctx = m_thread.GetRegisterContext().get();
assert (reg_ctx);
addr_t pc = reg_ctx->GetPC();
addr_t sp = reg_ctx->GetSP();
addr_t fp = reg_ctx->GetFP();
log->Printf("%s Thread #%u (0x%p): tid = 0x%4.4" PRIx64 ", pc = 0x%8.8" PRIx64 ", sp = 0x%8.8" PRIx64 ", fp = 0x%8.8" PRIx64 ", "
"plan = '%s', state = %s, stop others = %d",
__FUNCTION__, m_thread.GetIndexID(),
static_cast<void*>(&m_thread), m_thread.GetID(),
static_cast<uint64_t>(pc), static_cast<uint64_t>(sp),
static_cast<uint64_t>(fp), m_name.c_str(),
StateAsCString(resume_state), StopOthers());
}
}
return DoWillResume (resume_state, current_plan);
}
lldb::user_id_t
ThreadPlan::GetNextID()
{
static uint32_t g_nextPlanID = 0;
return ++g_nextPlanID;
}
void
ThreadPlan::DidPush()
{
}
void
ThreadPlan::WillPop()
{
}
bool
ThreadPlan::OkayToDiscard()
{
if (!IsMasterPlan())
return true;
else
return m_okay_to_discard;
}
lldb::StateType
ThreadPlan::RunState ()
{
if (m_tracer_sp && m_tracer_sp->TracingEnabled() && m_tracer_sp->SingleStepEnabled())
return eStateStepping;
else
return GetPlanRunState();
}
bool
ThreadPlan::IsUsuallyUnexplainedStopReason(lldb::StopReason reason)
{
switch (reason)
{
case eStopReasonWatchpoint:
case eStopReasonSignal:
case eStopReasonException:
case eStopReasonExec:
case eStopReasonThreadExiting:
case eStopReasonInstrumentation:
return true;
default:
return false;
}
}
//----------------------------------------------------------------------
// ThreadPlanNull
//----------------------------------------------------------------------
ThreadPlanNull::ThreadPlanNull (Thread &thread) :
ThreadPlan (ThreadPlan::eKindNull,
"Null Thread Plan",
thread,
eVoteNoOpinion,
eVoteNoOpinion)
{
}
ThreadPlanNull::~ThreadPlanNull ()
{
}
void
ThreadPlanNull::GetDescription (Stream *s,
lldb::DescriptionLevel level)
{
s->PutCString("Null thread plan - thread has been destroyed.");
}
bool
ThreadPlanNull::ValidatePlan (Stream *error)
{
#ifdef LLDB_CONFIGURATION_DEBUG
fprintf(stderr, "error: %s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#else
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Error("%s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#endif
return true;
}
bool
ThreadPlanNull::ShouldStop (Event *event_ptr)
{
#ifdef LLDB_CONFIGURATION_DEBUG
fprintf(stderr, "error: %s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#else
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Error("%s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#endif
return true;
}
bool
ThreadPlanNull::WillStop ()
{
#ifdef LLDB_CONFIGURATION_DEBUG
fprintf(stderr, "error: %s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#else
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Error("%s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#endif
return true;
}
bool
ThreadPlanNull::DoPlanExplainsStop (Event *event_ptr)
{
#ifdef LLDB_CONFIGURATION_DEBUG
fprintf(stderr, "error: %s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#else
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Error("%s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#endif
return true;
}
// The null plan is never done.
bool
ThreadPlanNull::MischiefManaged ()
{
// The null plan is never done.
#ifdef LLDB_CONFIGURATION_DEBUG
fprintf(stderr, "error: %s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#else
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Error("%s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#endif
return false;
}
lldb::StateType
ThreadPlanNull::GetPlanRunState ()
{
// Not sure what to return here. This is a dead thread.
#ifdef LLDB_CONFIGURATION_DEBUG
fprintf(stderr, "error: %s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#else
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Error("%s called on thread that has been destroyed (tid = 0x%" PRIx64 ", ptid = 0x%" PRIx64 ")",
__PRETTY_FUNCTION__,
m_thread.GetID(),
m_thread.GetProtocolID());
#endif
return eStateRunning;
}
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