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| //===-- ThreadPlanBase.cpp --------------------------------------*- C++ -*-===//
//
// 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/ThreadPlanBase.h"
//
#include "lldb/Breakpoint/Breakpoint.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Breakpoint/BreakpointSite.h"
#include "lldb/Breakpoint/StoppointCallbackContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
// ThreadPlanBase: This one always stops, and never has anything particular to
// do.
// FIXME: The "signal handling" policies should probably go here.
ThreadPlanBase::ThreadPlanBase(Thread &thread)
: ThreadPlan(ThreadPlan::eKindBase, "base plan", thread, eVoteYes,
eVoteNoOpinion) {
// Set the tracer to a default tracer.
// FIXME: need to add a thread settings variable to pix various tracers...
#define THREAD_PLAN_USE_ASSEMBLY_TRACER 1
#ifdef THREAD_PLAN_USE_ASSEMBLY_TRACER
ThreadPlanTracerSP new_tracer_sp(new ThreadPlanAssemblyTracer(m_thread));
#else
ThreadPlanTracerSP new_tracer_sp(new ThreadPlanTracer(m_thread));
#endif
new_tracer_sp->EnableTracing(m_thread.GetTraceEnabledState());
SetThreadPlanTracer(new_tracer_sp);
SetIsMasterPlan(true);
}
ThreadPlanBase::~ThreadPlanBase() {}
void ThreadPlanBase::GetDescription(Stream *s, lldb::DescriptionLevel level) {
s->Printf("Base thread plan.");
}
bool ThreadPlanBase::ValidatePlan(Stream *error) { return true; }
bool ThreadPlanBase::DoPlanExplainsStop(Event *event_ptr) {
// The base plan should defer to its tracer, since by default it always
// handles the stop.
return !TracerExplainsStop();
}
Vote ThreadPlanBase::ShouldReportStop(Event *event_ptr) {
StopInfoSP stop_info_sp = m_thread.GetStopInfo();
if (stop_info_sp) {
bool should_notify = stop_info_sp->ShouldNotify(event_ptr);
if (should_notify)
return eVoteYes;
else
return eVoteNoOpinion;
} else
return eVoteNoOpinion;
}
bool ThreadPlanBase::ShouldStop(Event *event_ptr) {
m_stop_vote = eVoteYes;
m_run_vote = eVoteYes;
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP));
StopInfoSP stop_info_sp = GetPrivateStopInfo();
if (stop_info_sp) {
StopReason reason = stop_info_sp->GetStopReason();
switch (reason) {
case eStopReasonInvalid:
case eStopReasonNone:
// This
m_run_vote = eVoteNoOpinion;
m_stop_vote = eVoteNo;
return false;
case eStopReasonBreakpoint:
case eStopReasonWatchpoint:
if (stop_info_sp->ShouldStopSynchronous(event_ptr)) {
// If we are going to stop for a breakpoint, then unship the other
// plans at this point. Don't force the discard, however, so Master
// plans can stay in place if they want to.
LLDB_LOGF(
log,
"Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
" (breakpoint hit.)",
m_thread.GetID());
m_thread.DiscardThreadPlans(false);
return true;
}
// If we aren't going to stop at this breakpoint, and it is internal,
// don't report this stop or the subsequent running event. Otherwise we
// will post the stopped & running, but the stopped event will get marked
// with "restarted" so the UI will know to wait and expect the consequent
// "running".
if (stop_info_sp->ShouldNotify(event_ptr)) {
m_stop_vote = eVoteYes;
m_run_vote = eVoteYes;
} else {
m_stop_vote = eVoteNo;
m_run_vote = eVoteNo;
}
return false;
// TODO: the break below was missing, was this intentional??? If so
// please mention it
break;
case eStopReasonException:
// If we crashed, discard thread plans and stop. Don't force the
// discard, however, since on rerun the target may clean up this
// exception and continue normally from there.
LLDB_LOGF(
log,
"Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
" (exception: %s)",
m_thread.GetID(), stop_info_sp->GetDescription());
m_thread.DiscardThreadPlans(false);
return true;
case eStopReasonExec:
// If we crashed, discard thread plans and stop. Don't force the
// discard, however, since on rerun the target may clean up this
// exception and continue normally from there.
LLDB_LOGF(
log,
"Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
" (exec.)",
m_thread.GetID());
m_thread.DiscardThreadPlans(false);
return true;
case eStopReasonThreadExiting:
case eStopReasonSignal:
if (stop_info_sp->ShouldStop(event_ptr)) {
LLDB_LOGF(
log,
"Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
" (signal: %s)",
m_thread.GetID(), stop_info_sp->GetDescription());
m_thread.DiscardThreadPlans(false);
return true;
} else {
// We're not going to stop, but while we are here, let's figure out
// whether to report this.
if (stop_info_sp->ShouldNotify(event_ptr))
m_stop_vote = eVoteYes;
else
m_stop_vote = eVoteNo;
}
return false;
default:
return true;
}
} else {
m_run_vote = eVoteNoOpinion;
m_stop_vote = eVoteNo;
}
// If there's no explicit reason to stop, then we will continue.
return false;
}
bool ThreadPlanBase::StopOthers() { return false; }
StateType ThreadPlanBase::GetPlanRunState() { return eStateRunning; }
bool ThreadPlanBase::WillStop() { return true; }
bool ThreadPlanBase::DoWillResume(lldb::StateType resume_state,
bool current_plan) {
// Reset these to the default values so we don't set them wrong, then not get
// asked for a while, then return the wrong answer.
m_run_vote = eVoteNoOpinion;
m_stop_vote = eVoteNo;
return true;
}
// The base plan is never done.
bool ThreadPlanBase::MischiefManaged() {
// The base plan is never done.
return false;
}
|