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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.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Target/ThreadPlan.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/State.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.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(),
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() = default;
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() {
std::lock_guard<std::recursive_mutex> guard(m_plan_complete_mutex);
return m_plan_complete;
}
void ThreadPlan::SetPlanComplete(bool success) {
std::lock_guard<std::recursive_mutex> guard(m_plan_complete_mutex);
m_plan_complete = true;
m_plan_succeeded = success;
}
bool ThreadPlan::MischiefManaged() {
std::lock_guard<std::recursive_mutex> guard(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();
return (prev_plan == nullptr) ? false : 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() {
return IsMasterPlan() ? m_okay_to_discard : true;
}
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() = default;
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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_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 ")",
LLVM_PRETTY_FUNCTION, m_thread.GetID(),
m_thread.GetProtocolID());
#endif
return eStateRunning;
}
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