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clang-p2996/lldb/source/Target/Thread.cpp
Adrian Prantl 878a64f94a [lldb] Upgrade CompilerType::GetBitSize to return llvm::Expected (#129601) 
This patch pushes the error handling boundary for the GetBitSize()
methods from Runtime into the Type and CompilerType APIs. This makes it
easier to diagnose problems thanks to more meaningful error messages
being available. GetBitSize() is often the first thing LLDB asks about a
type, so this method is particularly important for a better user
experience.

rdar://145667239
2025-03-05 10:21:19 -08:00

2114 lines
74 KiB
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//===-- Thread.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/Thread.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/FormatEntity.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/StructuredDataImpl.h"
#include "lldb/Host/Host.h"
#include "lldb/Interpreter/OptionValueFileSpecList.h"
#include "lldb/Interpreter/OptionValueProperties.h"
#include "lldb/Interpreter/Property.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/DynamicLoader.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/LanguageRuntime.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/ScriptedThreadPlan.h"
#include "lldb/Target/StackFrameRecognizer.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Target/SystemRuntime.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/ThreadPlan.h"
#include "lldb/Target/ThreadPlanBase.h"
#include "lldb/Target/ThreadPlanCallFunction.h"
#include "lldb/Target/ThreadPlanRunToAddress.h"
#include "lldb/Target/ThreadPlanStack.h"
#include "lldb/Target/ThreadPlanStepInRange.h"
#include "lldb/Target/ThreadPlanStepInstruction.h"
#include "lldb/Target/ThreadPlanStepOut.h"
#include "lldb/Target/ThreadPlanStepOverBreakpoint.h"
#include "lldb/Target/ThreadPlanStepOverRange.h"
#include "lldb/Target/ThreadPlanStepThrough.h"
#include "lldb/Target/ThreadPlanStepUntil.h"
#include "lldb/Target/ThreadSpec.h"
#include "lldb/Target/UnwindLLDB.h"
#include "lldb/Utility/LLDBLog.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/RegularExpression.h"
#include "lldb/Utility/State.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/StreamString.h"
#include "lldb/ValueObject/ValueObject.h"
#include "lldb/ValueObject/ValueObjectConstResult.h"
#include "lldb/lldb-enumerations.h"
#include <memory>
#include <optional>
using namespace lldb;
using namespace lldb_private;
ThreadProperties &Thread::GetGlobalProperties() {
// NOTE: intentional leak so we don't crash if global destructor chain gets
// called as other threads still use the result of this function
static ThreadProperties *g_settings_ptr = new ThreadProperties(true);
return *g_settings_ptr;
}
#define LLDB_PROPERTIES_thread
#include "TargetProperties.inc"
enum {
#define LLDB_PROPERTIES_thread
#include "TargetPropertiesEnum.inc"
};
class ThreadOptionValueProperties
: public Cloneable<ThreadOptionValueProperties, OptionValueProperties> {
public:
ThreadOptionValueProperties(llvm::StringRef name) : Cloneable(name) {}
const Property *
GetPropertyAtIndex(size_t idx,
const ExecutionContext *exe_ctx) const override {
// When getting the value for a key from the thread options, we will always
// try and grab the setting from the current thread if there is one. Else
// we just use the one from this instance.
if (exe_ctx) {
Thread *thread = exe_ctx->GetThreadPtr();
if (thread) {
ThreadOptionValueProperties *instance_properties =
static_cast<ThreadOptionValueProperties *>(
thread->GetValueProperties().get());
if (this != instance_properties)
return instance_properties->ProtectedGetPropertyAtIndex(idx);
}
}
return ProtectedGetPropertyAtIndex(idx);
}
};
ThreadProperties::ThreadProperties(bool is_global) : Properties() {
if (is_global) {
m_collection_sp = std::make_shared<ThreadOptionValueProperties>("thread");
m_collection_sp->Initialize(g_thread_properties);
} else
m_collection_sp =
OptionValueProperties::CreateLocalCopy(Thread::GetGlobalProperties());
}
ThreadProperties::~ThreadProperties() = default;
const RegularExpression *ThreadProperties::GetSymbolsToAvoidRegexp() {
const uint32_t idx = ePropertyStepAvoidRegex;
return GetPropertyAtIndexAs<const RegularExpression *>(idx);
}
FileSpecList ThreadProperties::GetLibrariesToAvoid() const {
const uint32_t idx = ePropertyStepAvoidLibraries;
return GetPropertyAtIndexAs<FileSpecList>(idx, {});
}
bool ThreadProperties::GetTraceEnabledState() const {
const uint32_t idx = ePropertyEnableThreadTrace;
return GetPropertyAtIndexAs<bool>(
idx, g_thread_properties[idx].default_uint_value != 0);
}
bool ThreadProperties::GetStepInAvoidsNoDebug() const {
const uint32_t idx = ePropertyStepInAvoidsNoDebug;
return GetPropertyAtIndexAs<bool>(
idx, g_thread_properties[idx].default_uint_value != 0);
}
bool ThreadProperties::GetStepOutAvoidsNoDebug() const {
const uint32_t idx = ePropertyStepOutAvoidsNoDebug;
return GetPropertyAtIndexAs<bool>(
idx, g_thread_properties[idx].default_uint_value != 0);
}
uint64_t ThreadProperties::GetMaxBacktraceDepth() const {
const uint32_t idx = ePropertyMaxBacktraceDepth;
return GetPropertyAtIndexAs<uint64_t>(
idx, g_thread_properties[idx].default_uint_value);
}
uint64_t ThreadProperties::GetSingleThreadPlanTimeout() const {
const uint32_t idx = ePropertySingleThreadPlanTimeout;
return GetPropertyAtIndexAs<uint64_t>(
idx, g_thread_properties[idx].default_uint_value);
}
// Thread Event Data
llvm::StringRef Thread::ThreadEventData::GetFlavorString() {
return "Thread::ThreadEventData";
}
Thread::ThreadEventData::ThreadEventData(const lldb::ThreadSP thread_sp)
: m_thread_sp(thread_sp), m_stack_id() {}
Thread::ThreadEventData::ThreadEventData(const lldb::ThreadSP thread_sp,
const StackID &stack_id)
: m_thread_sp(thread_sp), m_stack_id(stack_id) {}
Thread::ThreadEventData::ThreadEventData() : m_thread_sp(), m_stack_id() {}
Thread::ThreadEventData::~ThreadEventData() = default;
void Thread::ThreadEventData::Dump(Stream *s) const {}
const Thread::ThreadEventData *
Thread::ThreadEventData::GetEventDataFromEvent(const Event *event_ptr) {
if (event_ptr) {
const EventData *event_data = event_ptr->GetData();
if (event_data &&
event_data->GetFlavor() == ThreadEventData::GetFlavorString())
return static_cast<const ThreadEventData *>(event_ptr->GetData());
}
return nullptr;
}
ThreadSP Thread::ThreadEventData::GetThreadFromEvent(const Event *event_ptr) {
ThreadSP thread_sp;
const ThreadEventData *event_data = GetEventDataFromEvent(event_ptr);
if (event_data)
thread_sp = event_data->GetThread();
return thread_sp;
}
StackID Thread::ThreadEventData::GetStackIDFromEvent(const Event *event_ptr) {
StackID stack_id;
const ThreadEventData *event_data = GetEventDataFromEvent(event_ptr);
if (event_data)
stack_id = event_data->GetStackID();
return stack_id;
}
StackFrameSP
Thread::ThreadEventData::GetStackFrameFromEvent(const Event *event_ptr) {
const ThreadEventData *event_data = GetEventDataFromEvent(event_ptr);
StackFrameSP frame_sp;
if (event_data) {
ThreadSP thread_sp = event_data->GetThread();
if (thread_sp) {
frame_sp = thread_sp->GetStackFrameList()->GetFrameWithStackID(
event_data->GetStackID());
}
}
return frame_sp;
}
// Thread class
llvm::StringRef Thread::GetStaticBroadcasterClass() {
static constexpr llvm::StringLiteral class_name("lldb.thread");
return class_name;
}
Thread::Thread(Process &process, lldb::tid_t tid, bool use_invalid_index_id)
: ThreadProperties(false), UserID(tid),
Broadcaster(process.GetTarget().GetDebugger().GetBroadcasterManager(),
Thread::GetStaticBroadcasterClass().str()),
m_process_wp(process.shared_from_this()), m_stop_info_sp(),
m_stop_info_stop_id(0), m_stop_info_override_stop_id(0),
m_should_run_before_public_stop(false),
m_stopped_at_unexecuted_bp(LLDB_INVALID_ADDRESS),
m_index_id(use_invalid_index_id ? LLDB_INVALID_INDEX32
: process.GetNextThreadIndexID(tid)),
m_reg_context_sp(), m_state(eStateUnloaded), m_state_mutex(),
m_frame_mutex(), m_curr_frames_sp(), m_prev_frames_sp(),
m_prev_framezero_pc(), m_resume_signal(LLDB_INVALID_SIGNAL_NUMBER),
m_resume_state(eStateRunning), m_temporary_resume_state(eStateRunning),
m_unwinder_up(), m_destroy_called(false),
m_override_should_notify(eLazyBoolCalculate),
m_extended_info_fetched(false), m_extended_info() {
Log *log = GetLog(LLDBLog::Object);
LLDB_LOGF(log, "%p Thread::Thread(tid = 0x%4.4" PRIx64 ")",
static_cast<void *>(this), GetID());
CheckInWithManager();
}
Thread::~Thread() {
Log *log = GetLog(LLDBLog::Object);
LLDB_LOGF(log, "%p Thread::~Thread(tid = 0x%4.4" PRIx64 ")",
static_cast<void *>(this), GetID());
/// If you hit this assert, it means your derived class forgot to call
/// DestroyThread in its destructor.
assert(m_destroy_called);
}
void Thread::DestroyThread() {
m_destroy_called = true;
m_stop_info_sp.reset();
m_reg_context_sp.reset();
m_unwinder_up.reset();
std::lock_guard<std::recursive_mutex> guard(m_frame_mutex);
m_curr_frames_sp.reset();
m_prev_frames_sp.reset();
m_prev_framezero_pc.reset();
}
void Thread::BroadcastSelectedFrameChange(StackID &new_frame_id) {
if (EventTypeHasListeners(eBroadcastBitSelectedFrameChanged)) {
auto data_sp =
std::make_shared<ThreadEventData>(shared_from_this(), new_frame_id);
BroadcastEvent(eBroadcastBitSelectedFrameChanged, data_sp);
}
}
lldb::StackFrameSP
Thread::GetSelectedFrame(SelectMostRelevant select_most_relevant) {
StackFrameListSP stack_frame_list_sp(GetStackFrameList());
StackFrameSP frame_sp = stack_frame_list_sp->GetFrameAtIndex(
stack_frame_list_sp->GetSelectedFrameIndex(select_most_relevant));
FrameSelectedCallback(frame_sp.get());
return frame_sp;
}
uint32_t Thread::SetSelectedFrame(lldb_private::StackFrame *frame,
bool broadcast) {
uint32_t ret_value = GetStackFrameList()->SetSelectedFrame(frame);
if (broadcast)
BroadcastSelectedFrameChange(frame->GetStackID());
FrameSelectedCallback(frame);
return ret_value;
}
bool Thread::SetSelectedFrameByIndex(uint32_t frame_idx, bool broadcast) {
StackFrameSP frame_sp(GetStackFrameList()->GetFrameAtIndex(frame_idx));
if (frame_sp) {
GetStackFrameList()->SetSelectedFrame(frame_sp.get());
if (broadcast)
BroadcastSelectedFrameChange(frame_sp->GetStackID());
FrameSelectedCallback(frame_sp.get());
return true;
} else
return false;
}
bool Thread::SetSelectedFrameByIndexNoisily(uint32_t frame_idx,
Stream &output_stream) {
const bool broadcast = true;
bool success = SetSelectedFrameByIndex(frame_idx, broadcast);
if (success) {
StackFrameSP frame_sp = GetSelectedFrame(DoNoSelectMostRelevantFrame);
if (frame_sp) {
bool already_shown = false;
SymbolContext frame_sc(
frame_sp->GetSymbolContext(eSymbolContextLineEntry));
const Debugger &debugger = GetProcess()->GetTarget().GetDebugger();
if (debugger.GetUseExternalEditor() && frame_sc.line_entry.GetFile() &&
frame_sc.line_entry.line != 0) {
if (llvm::Error e = Host::OpenFileInExternalEditor(
debugger.GetExternalEditor(), frame_sc.line_entry.GetFile(),
frame_sc.line_entry.line)) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Host), std::move(e),
"OpenFileInExternalEditor failed: {0}");
} else {
already_shown = true;
}
}
bool show_frame_info = true;
bool show_source = !already_shown;
FrameSelectedCallback(frame_sp.get());
return frame_sp->GetStatus(output_stream, show_frame_info, show_source);
}
return false;
} else
return false;
}
void Thread::FrameSelectedCallback(StackFrame *frame) {
if (!frame)
return;
if (frame->HasDebugInformation() &&
(GetProcess()->GetWarningsOptimization() ||
GetProcess()->GetWarningsUnsupportedLanguage())) {
SymbolContext sc =
frame->GetSymbolContext(eSymbolContextFunction | eSymbolContextModule);
GetProcess()->PrintWarningOptimization(sc);
GetProcess()->PrintWarningUnsupportedLanguage(sc);
}
}
lldb::StopInfoSP Thread::GetStopInfo() {
if (m_destroy_called)
return m_stop_info_sp;
ThreadPlanSP completed_plan_sp(GetCompletedPlan());
ProcessSP process_sp(GetProcess());
const uint32_t stop_id = process_sp ? process_sp->GetStopID() : UINT32_MAX;
// Here we select the stop info according to priorirty: - m_stop_info_sp (if
// not trace) - preset value - completed plan stop info - new value with plan
// from completed plan stack - m_stop_info_sp (trace stop reason is OK now) -
// ask GetPrivateStopInfo to set stop info
bool have_valid_stop_info = m_stop_info_sp &&
m_stop_info_sp ->IsValid() &&
m_stop_info_stop_id == stop_id;
bool have_valid_completed_plan = completed_plan_sp && completed_plan_sp->PlanSucceeded();
bool plan_failed = completed_plan_sp && !completed_plan_sp->PlanSucceeded();
bool plan_overrides_trace =
have_valid_stop_info && have_valid_completed_plan
&& (m_stop_info_sp->GetStopReason() == eStopReasonTrace);
if (have_valid_stop_info && !plan_overrides_trace && !plan_failed) {
return m_stop_info_sp;
} else if (completed_plan_sp) {
return StopInfo::CreateStopReasonWithPlan(
completed_plan_sp, GetReturnValueObject(), GetExpressionVariable());
} else {
GetPrivateStopInfo();
return m_stop_info_sp;
}
}
void Thread::CalculatePublicStopInfo() {
ResetStopInfo();
SetStopInfo(GetStopInfo());
}
lldb::StopInfoSP Thread::GetPrivateStopInfo(bool calculate) {
if (!calculate)
return m_stop_info_sp;
if (m_destroy_called)
return m_stop_info_sp;
ProcessSP process_sp(GetProcess());
if (process_sp) {
const uint32_t process_stop_id = process_sp->GetStopID();
if (m_stop_info_stop_id != process_stop_id) {
// We preserve the old stop info for a variety of reasons:
// 1) Someone has already updated it by the time we get here
// 2) We didn't get to execute the breakpoint instruction we stopped at
// 3) This is a virtual step so we didn't actually run
// 4) If this thread wasn't allowed to run the last time round.
if (m_stop_info_sp) {
if (m_stop_info_sp->IsValid() || IsStillAtLastBreakpointHit() ||
GetCurrentPlan()->IsVirtualStep()
|| GetTemporaryResumeState() == eStateSuspended)
SetStopInfo(m_stop_info_sp);
else
m_stop_info_sp.reset();
}
if (!m_stop_info_sp) {
if (!CalculateStopInfo())
SetStopInfo(StopInfoSP());
}
}
// The stop info can be manually set by calling Thread::SetStopInfo() prior
// to this function ever getting called, so we can't rely on
// "m_stop_info_stop_id != process_stop_id" as the condition for the if
// statement below, we must also check the stop info to see if we need to
// override it. See the header documentation in
// Architecture::OverrideStopInfo() for more information on the stop
// info override callback.
if (m_stop_info_override_stop_id != process_stop_id) {
m_stop_info_override_stop_id = process_stop_id;
if (m_stop_info_sp) {
if (const Architecture *arch =
process_sp->GetTarget().GetArchitecturePlugin())
arch->OverrideStopInfo(*this);
}
}
}
// If we were resuming the process and it was interrupted,
// return no stop reason. This thread would like to resume.
if (m_stop_info_sp && m_stop_info_sp->WasContinueInterrupted(*this))
return {};
return m_stop_info_sp;
}
lldb::StopReason Thread::GetStopReason() {
lldb::StopInfoSP stop_info_sp(GetStopInfo());
if (stop_info_sp)
return stop_info_sp->GetStopReason();
return eStopReasonNone;
}
bool Thread::StopInfoIsUpToDate() const {
ProcessSP process_sp(GetProcess());
if (process_sp)
return m_stop_info_stop_id == process_sp->GetStopID();
else
return true; // Process is no longer around so stop info is always up to
// date...
}
void Thread::ResetStopInfo() {
if (m_stop_info_sp) {
m_stop_info_sp.reset();
}
}
void Thread::SetStopInfo(const lldb::StopInfoSP &stop_info_sp) {
m_stop_info_sp = stop_info_sp;
if (m_stop_info_sp) {
m_stop_info_sp->MakeStopInfoValid();
// If we are overriding the ShouldReportStop, do that here:
if (m_override_should_notify != eLazyBoolCalculate)
m_stop_info_sp->OverrideShouldNotify(m_override_should_notify ==
eLazyBoolYes);
}
ProcessSP process_sp(GetProcess());
if (process_sp)
m_stop_info_stop_id = process_sp->GetStopID();
else
m_stop_info_stop_id = UINT32_MAX;
Log *log = GetLog(LLDBLog::Thread);
LLDB_LOGF(log, "%p: tid = 0x%" PRIx64 ": stop info = %s (stop_id = %u)",
static_cast<void *>(this), GetID(),
stop_info_sp ? stop_info_sp->GetDescription() : "<NULL>",
m_stop_info_stop_id);
}
void Thread::SetShouldReportStop(Vote vote) {
if (vote == eVoteNoOpinion)
return;
else {
m_override_should_notify = (vote == eVoteYes ? eLazyBoolYes : eLazyBoolNo);
if (m_stop_info_sp)
m_stop_info_sp->OverrideShouldNotify(m_override_should_notify ==
eLazyBoolYes);
}
}
void Thread::SetStopInfoToNothing() {
// Note, we can't just NULL out the private reason, or the native thread
// implementation will try to go calculate it again. For now, just set it to
// a Unix Signal with an invalid signal number.
SetStopInfo(
StopInfo::CreateStopReasonWithSignal(*this, LLDB_INVALID_SIGNAL_NUMBER));
}
bool Thread::ThreadStoppedForAReason() { return (bool)GetPrivateStopInfo(); }
bool Thread::CheckpointThreadState(ThreadStateCheckpoint &saved_state) {
saved_state.register_backup_sp.reset();
lldb::StackFrameSP frame_sp(GetStackFrameAtIndex(0));
if (frame_sp) {
lldb::RegisterCheckpointSP reg_checkpoint_sp(
new RegisterCheckpoint(RegisterCheckpoint::Reason::eExpression));
if (reg_checkpoint_sp) {
lldb::RegisterContextSP reg_ctx_sp(frame_sp->GetRegisterContext());
if (reg_ctx_sp && reg_ctx_sp->ReadAllRegisterValues(*reg_checkpoint_sp))
saved_state.register_backup_sp = reg_checkpoint_sp;
}
}
if (!saved_state.register_backup_sp)
return false;
saved_state.stop_info_sp = GetStopInfo();
ProcessSP process_sp(GetProcess());
if (process_sp)
saved_state.orig_stop_id = process_sp->GetStopID();
saved_state.current_inlined_depth = GetCurrentInlinedDepth();
saved_state.m_completed_plan_checkpoint =
GetPlans().CheckpointCompletedPlans();
saved_state.stopped_at_unexecuted_bp = m_stopped_at_unexecuted_bp;
return true;
}
bool Thread::RestoreRegisterStateFromCheckpoint(
ThreadStateCheckpoint &saved_state) {
if (saved_state.register_backup_sp) {
lldb::StackFrameSP frame_sp(GetStackFrameAtIndex(0));
if (frame_sp) {
lldb::RegisterContextSP reg_ctx_sp(frame_sp->GetRegisterContext());
if (reg_ctx_sp) {
bool ret =
reg_ctx_sp->WriteAllRegisterValues(*saved_state.register_backup_sp);
// Clear out all stack frames as our world just changed.
ClearStackFrames();
reg_ctx_sp->InvalidateIfNeeded(true);
if (m_unwinder_up)
m_unwinder_up->Clear();
return ret;
}
}
}
return false;
}
void Thread::RestoreThreadStateFromCheckpoint(
ThreadStateCheckpoint &saved_state) {
if (saved_state.stop_info_sp)
saved_state.stop_info_sp->MakeStopInfoValid();
SetStopInfo(saved_state.stop_info_sp);
GetStackFrameList()->SetCurrentInlinedDepth(
saved_state.current_inlined_depth);
GetPlans().RestoreCompletedPlanCheckpoint(
saved_state.m_completed_plan_checkpoint);
m_stopped_at_unexecuted_bp = saved_state.stopped_at_unexecuted_bp;
}
StateType Thread::GetState() const {
// If any other threads access this we will need a mutex for it
std::lock_guard<std::recursive_mutex> guard(m_state_mutex);
return m_state;
}
void Thread::SetState(StateType state) {
std::lock_guard<std::recursive_mutex> guard(m_state_mutex);
m_state = state;
}
std::string Thread::GetStopDescription() {
StackFrameSP frame_sp = GetStackFrameAtIndex(0);
if (!frame_sp)
return GetStopDescriptionRaw();
auto recognized_frame_sp = frame_sp->GetRecognizedFrame();
if (!recognized_frame_sp)
return GetStopDescriptionRaw();
std::string recognized_stop_description =
recognized_frame_sp->GetStopDescription();
if (!recognized_stop_description.empty())
return recognized_stop_description;
return GetStopDescriptionRaw();
}
std::string Thread::GetStopDescriptionRaw() {
StopInfoSP stop_info_sp = GetStopInfo();
std::string raw_stop_description;
if (stop_info_sp && stop_info_sp->IsValid()) {
raw_stop_description = stop_info_sp->GetDescription();
assert((!raw_stop_description.empty() ||
stop_info_sp->GetStopReason() == eStopReasonNone) &&
"StopInfo returned an empty description.");
}
return raw_stop_description;
}
void Thread::WillStop() {
ThreadPlan *current_plan = GetCurrentPlan();
// FIXME: I may decide to disallow threads with no plans. In which
// case this should go to an assert.
if (!current_plan)
return;
current_plan->WillStop();
}
bool Thread::SetupForResume() {
if (GetResumeState() != eStateSuspended) {
// First check whether this thread is going to "actually" resume at all.
// For instance, if we're stepping from one level to the next of an
// virtual inlined call stack, we just change the inlined call stack index
// without actually running this thread. In that case, for this thread we
// shouldn't push a step over breakpoint plan or do that work.
if (GetCurrentPlan()->IsVirtualStep())
return false;
// If we're at a breakpoint push the step-over breakpoint plan. Do this
// before telling the current plan it will resume, since we might change
// what the current plan is.
lldb::RegisterContextSP reg_ctx_sp(GetRegisterContext());
if (reg_ctx_sp) {
const addr_t thread_pc = reg_ctx_sp->GetPC();
BreakpointSiteSP bp_site_sp =
GetProcess()->GetBreakpointSiteList().FindByAddress(thread_pc);
// If we're at a BreakpointSite which we have either
// 1. already triggered/hit, or
// 2. the Breakpoint was added while stopped, or the pc was moved
// to this BreakpointSite
// Step past the breakpoint before resuming.
// If we stopped at a breakpoint instruction/BreakpointSite location
// without hitting it, and we're still at that same address on
// resuming, then we want to hit the BreakpointSite when we resume.
if (bp_site_sp && m_stopped_at_unexecuted_bp != thread_pc) {
// Note, don't assume there's a ThreadPlanStepOverBreakpoint, the
// target may not require anything special to step over a breakpoint.
ThreadPlan *cur_plan = GetCurrentPlan();
bool push_step_over_bp_plan = false;
if (cur_plan->GetKind() == ThreadPlan::eKindStepOverBreakpoint) {
ThreadPlanStepOverBreakpoint *bp_plan =
(ThreadPlanStepOverBreakpoint *)cur_plan;
if (bp_plan->GetBreakpointLoadAddress() != thread_pc)
push_step_over_bp_plan = true;
} else
push_step_over_bp_plan = true;
if (push_step_over_bp_plan) {
ThreadPlanSP step_bp_plan_sp(new ThreadPlanStepOverBreakpoint(*this));
if (step_bp_plan_sp) {
step_bp_plan_sp->SetPrivate(true);
if (GetCurrentPlan()->RunState() != eStateStepping) {
ThreadPlanStepOverBreakpoint *step_bp_plan =
static_cast<ThreadPlanStepOverBreakpoint *>(
step_bp_plan_sp.get());
step_bp_plan->SetAutoContinue(true);
}
QueueThreadPlan(step_bp_plan_sp, false);
return true;
}
}
}
}
}
return false;
}
bool Thread::ShouldResume(StateType resume_state) {
// At this point clear the completed plan stack.
GetPlans().WillResume();
m_override_should_notify = eLazyBoolCalculate;
StateType prev_resume_state = GetTemporaryResumeState();
SetTemporaryResumeState(resume_state);
lldb::ThreadSP backing_thread_sp(GetBackingThread());
if (backing_thread_sp)
backing_thread_sp->SetTemporaryResumeState(resume_state);
// Make sure m_stop_info_sp is valid. Don't do this for threads we suspended
// in the previous run.
if (prev_resume_state != eStateSuspended)
GetPrivateStopInfo();
// This is a little dubious, but we are trying to limit how often we actually
// fetch stop info from the target, 'cause that slows down single stepping.
// So assume that if we got to the point where we're about to resume, and we
// haven't yet had to fetch the stop reason, then it doesn't need to know
// about the fact that we are resuming...
const uint32_t process_stop_id = GetProcess()->GetStopID();
if (m_stop_info_stop_id == process_stop_id &&
(m_stop_info_sp && m_stop_info_sp->IsValid())) {
StopInfo *stop_info = GetPrivateStopInfo().get();
if (stop_info)
stop_info->WillResume(resume_state);
}
// Tell all the plans that we are about to resume in case they need to clear
// any state. We distinguish between the plan on the top of the stack and the
// lower plans in case a plan needs to do any special business before it
// runs.
bool need_to_resume = false;
ThreadPlan *plan_ptr = GetCurrentPlan();
if (plan_ptr) {
need_to_resume = plan_ptr->WillResume(resume_state, true);
while ((plan_ptr = GetPreviousPlan(plan_ptr)) != nullptr) {
plan_ptr->WillResume(resume_state, false);
}
// If the WillResume for the plan says we are faking a resume, then it will
// have set an appropriate stop info. In that case, don't reset it here.
if (need_to_resume && resume_state != eStateSuspended) {
m_stop_info_sp.reset();
}
}
if (need_to_resume) {
ClearStackFrames();
m_stopped_at_unexecuted_bp = LLDB_INVALID_ADDRESS;
// Let Thread subclasses do any special work they need to prior to resuming
WillResume(resume_state);
}
return need_to_resume;
}
void Thread::DidResume() {
SetResumeSignal(LLDB_INVALID_SIGNAL_NUMBER);
// This will get recomputed each time when we stop.
SetShouldRunBeforePublicStop(false);
}
void Thread::DidStop() { SetState(eStateStopped); }
bool Thread::ShouldStop(Event *event_ptr) {
ThreadPlan *current_plan = GetCurrentPlan();
bool should_stop = true;
Log *log = GetLog(LLDBLog::Step);
if (GetResumeState() == eStateSuspended) {
LLDB_LOGF(log,
"Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64
", should_stop = 0 (ignore since thread was suspended)",
__FUNCTION__, GetID(), GetProtocolID());
return false;
}
if (GetTemporaryResumeState() == eStateSuspended) {
LLDB_LOGF(log,
"Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64
", should_stop = 0 (ignore since thread was suspended)",
__FUNCTION__, GetID(), GetProtocolID());
return false;
}
// Based on the current thread plan and process stop info, check if this
// thread caused the process to stop. NOTE: this must take place before the
// plan is moved from the current plan stack to the completed plan stack.
if (!ThreadStoppedForAReason()) {
LLDB_LOGF(log,
"Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64
", pc = 0x%16.16" PRIx64
", should_stop = 0 (ignore since no stop reason)",
__FUNCTION__, GetID(), GetProtocolID(),
GetRegisterContext() ? GetRegisterContext()->GetPC()
: LLDB_INVALID_ADDRESS);
return false;
}
// Clear the "must run me before stop" if it was set:
SetShouldRunBeforePublicStop(false);
if (log) {
LLDB_LOGF(log,
"Thread::%s(%p) for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64
", pc = 0x%16.16" PRIx64,
__FUNCTION__, static_cast<void *>(this), GetID(), GetProtocolID(),
GetRegisterContext() ? GetRegisterContext()->GetPC()
: LLDB_INVALID_ADDRESS);
LLDB_LOGF(log, "^^^^^^^^ Thread::ShouldStop Begin ^^^^^^^^");
StreamString s;
s.IndentMore();
GetProcess()->DumpThreadPlansForTID(
s, GetID(), eDescriptionLevelVerbose, true /* internal */,
false /* condense_trivial */, true /* skip_unreported */);
LLDB_LOGF(log, "Plan stack initial state:\n%s", s.GetData());
}
// The top most plan always gets to do the trace log...
current_plan->DoTraceLog();
// First query the stop info's ShouldStopSynchronous. This handles
// "synchronous" stop reasons, for example the breakpoint command on internal
// breakpoints. If a synchronous stop reason says we should not stop, then
// we don't have to do any more work on this stop.
StopInfoSP private_stop_info(GetPrivateStopInfo());
if (private_stop_info &&
!private_stop_info->ShouldStopSynchronous(event_ptr)) {
LLDB_LOGF(log, "StopInfo::ShouldStop async callback says we should not "
"stop, returning ShouldStop of false.");
return false;
}
// If we've already been restarted, don't query the plans since the state
// they would examine is not current.
if (Process::ProcessEventData::GetRestartedFromEvent(event_ptr))
return false;
// Before the plans see the state of the world, calculate the current inlined
// depth.
GetStackFrameList()->CalculateCurrentInlinedDepth();
// If the base plan doesn't understand why we stopped, then we have to find a
// plan that does. If that plan is still working, then we don't need to do
// any more work. If the plan that explains the stop is done, then we should
// pop all the plans below it, and pop it, and then let the plans above it
// decide whether they still need to do more work.
bool done_processing_current_plan = false;
if (!current_plan->PlanExplainsStop(event_ptr)) {
if (current_plan->TracerExplainsStop()) {
done_processing_current_plan = true;
should_stop = false;
} else {
// Leaf plan that does not explain the stop should be popped.
// The plan should be push itself later again before resuming to stay
// as leaf.
if (current_plan->IsLeafPlan())
PopPlan();
// If the current plan doesn't explain the stop, then find one that does
// and let it handle the situation.
ThreadPlan *plan_ptr = current_plan;
while ((plan_ptr = GetPreviousPlan(plan_ptr)) != nullptr) {
if (plan_ptr->PlanExplainsStop(event_ptr)) {
LLDB_LOGF(log, "Plan %s explains stop.", plan_ptr->GetName());
should_stop = plan_ptr->ShouldStop(event_ptr);
// plan_ptr explains the stop, next check whether plan_ptr is done,
// if so, then we should take it and all the plans below it off the
// stack.
if (plan_ptr->MischiefManaged()) {
// We're going to pop the plans up to and including the plan that
// explains the stop.
ThreadPlan *prev_plan_ptr = GetPreviousPlan(plan_ptr);
do {
if (should_stop)
current_plan->WillStop();
PopPlan();
} while ((current_plan = GetCurrentPlan()) != prev_plan_ptr);
// Now, if the responsible plan was not "Okay to discard" then
// we're done, otherwise we forward this to the next plan in the
// stack below.
done_processing_current_plan =
(plan_ptr->IsControllingPlan() && !plan_ptr->OkayToDiscard());
} else {
bool should_force_run = plan_ptr->ShouldRunBeforePublicStop();
if (should_force_run) {
SetShouldRunBeforePublicStop(true);
should_stop = false;
}
done_processing_current_plan = true;
}
break;
}
}
}
}
if (!done_processing_current_plan) {
bool override_stop = false;
// We're starting from the base plan, so just let it decide;
if (current_plan->IsBasePlan()) {
should_stop = current_plan->ShouldStop(event_ptr);
LLDB_LOGF(log, "Base plan says should stop: %i.", should_stop);
} else {
// Otherwise, don't let the base plan override what the other plans say
// to do, since presumably if there were other plans they would know what
// to do...
while (true) {
if (current_plan->IsBasePlan())
break;
should_stop = current_plan->ShouldStop(event_ptr);
LLDB_LOGF(log, "Plan %s should stop: %d.", current_plan->GetName(),
should_stop);
if (current_plan->MischiefManaged()) {
if (should_stop)
current_plan->WillStop();
if (current_plan->ShouldAutoContinue(event_ptr)) {
override_stop = true;
LLDB_LOGF(log, "Plan %s auto-continue: true.",
current_plan->GetName());
}
// If a Controlling Plan wants to stop, we let it. Otherwise, see if
// the plan's parent wants to stop.
PopPlan();
if (should_stop && current_plan->IsControllingPlan() &&
!current_plan->OkayToDiscard()) {
break;
}
current_plan = GetCurrentPlan();
if (current_plan == nullptr) {
break;
}
} else {
break;
}
}
}
if (override_stop)
should_stop = false;
}
// One other potential problem is that we set up a controlling plan, then stop
// in before it is complete - for instance by hitting a breakpoint during a
// step-over - then do some step/finish/etc operations that wind up past the
// end point condition of the initial plan. We don't want to strand the
// original plan on the stack, This code clears stale plans off the stack.
if (should_stop) {
ThreadPlan *plan_ptr = GetCurrentPlan();
// Discard the stale plans and all plans below them in the stack, plus move
// the completed plans to the completed plan stack
while (!plan_ptr->IsBasePlan()) {
bool stale = plan_ptr->IsPlanStale();
ThreadPlan *examined_plan = plan_ptr;
plan_ptr = GetPreviousPlan(examined_plan);
if (stale) {
LLDB_LOGF(
log,
"Plan %s being discarded in cleanup, it says it is already done.",
examined_plan->GetName());
while (GetCurrentPlan() != examined_plan) {
DiscardPlan();
}
if (examined_plan->IsPlanComplete()) {
// plan is complete but does not explain the stop (example: step to a
// line with breakpoint), let us move the plan to
// completed_plan_stack anyway
PopPlan();
} else
DiscardPlan();
}
}
}
if (log) {
StreamString s;
s.IndentMore();
GetProcess()->DumpThreadPlansForTID(
s, GetID(), eDescriptionLevelVerbose, true /* internal */,
false /* condense_trivial */, true /* skip_unreported */);
LLDB_LOGF(log, "Plan stack final state:\n%s", s.GetData());
LLDB_LOGF(log, "vvvvvvvv Thread::ShouldStop End (returning %i) vvvvvvvv",
should_stop);
}
return should_stop;
}
Vote Thread::ShouldReportStop(Event *event_ptr) {
StateType thread_state = GetResumeState();
StateType temp_thread_state = GetTemporaryResumeState();
Log *log = GetLog(LLDBLog::Step);
if (thread_state == eStateSuspended || thread_state == eStateInvalid) {
LLDB_LOGF(log,
"Thread::ShouldReportStop() tid = 0x%4.4" PRIx64
": returning vote %i (state was suspended or invalid)",
GetID(), eVoteNoOpinion);
return eVoteNoOpinion;
}
if (temp_thread_state == eStateSuspended ||
temp_thread_state == eStateInvalid) {
LLDB_LOGF(log,
"Thread::ShouldReportStop() tid = 0x%4.4" PRIx64
": returning vote %i (temporary state was suspended or invalid)",
GetID(), eVoteNoOpinion);
return eVoteNoOpinion;
}
if (!ThreadStoppedForAReason()) {
LLDB_LOGF(log,
"Thread::ShouldReportStop() tid = 0x%4.4" PRIx64
": returning vote %i (thread didn't stop for a reason.)",
GetID(), eVoteNoOpinion);
return eVoteNoOpinion;
}
if (GetPlans().AnyCompletedPlans()) {
// Pass skip_private = false to GetCompletedPlan, since we want to ask
// the last plan, regardless of whether it is private or not.
LLDB_LOGF(log,
"Thread::ShouldReportStop() tid = 0x%4.4" PRIx64
": returning vote for complete stack's back plan",
GetID());
return GetPlans().GetCompletedPlan(false)->ShouldReportStop(event_ptr);
} else {
Vote thread_vote = eVoteNoOpinion;
ThreadPlan *plan_ptr = GetCurrentPlan();
while (true) {
if (plan_ptr->PlanExplainsStop(event_ptr)) {
thread_vote = plan_ptr->ShouldReportStop(event_ptr);
break;
}
if (plan_ptr->IsBasePlan())
break;
else
plan_ptr = GetPreviousPlan(plan_ptr);
}
LLDB_LOGF(log,
"Thread::ShouldReportStop() tid = 0x%4.4" PRIx64
": returning vote %i for current plan",
GetID(), thread_vote);
return thread_vote;
}
}
Vote Thread::ShouldReportRun(Event *event_ptr) {
StateType thread_state = GetResumeState();
if (thread_state == eStateSuspended || thread_state == eStateInvalid) {
return eVoteNoOpinion;
}
Log *log = GetLog(LLDBLog::Step);
if (GetPlans().AnyCompletedPlans()) {
// Pass skip_private = false to GetCompletedPlan, since we want to ask
// the last plan, regardless of whether it is private or not.
LLDB_LOGF(log,
"Current Plan for thread %d(%p) (0x%4.4" PRIx64
", %s): %s being asked whether we should report run.",
GetIndexID(), static_cast<void *>(this), GetID(),
StateAsCString(GetTemporaryResumeState()),
GetCompletedPlan()->GetName());
return GetPlans().GetCompletedPlan(false)->ShouldReportRun(event_ptr);
} else {
LLDB_LOGF(log,
"Current Plan for thread %d(%p) (0x%4.4" PRIx64
", %s): %s being asked whether we should report run.",
GetIndexID(), static_cast<void *>(this), GetID(),
StateAsCString(GetTemporaryResumeState()),
GetCurrentPlan()->GetName());
return GetCurrentPlan()->ShouldReportRun(event_ptr);
}
}
bool Thread::MatchesSpec(const ThreadSpec *spec) {
return (spec == nullptr) ? true : spec->ThreadPassesBasicTests(*this);
}
ThreadPlanStack &Thread::GetPlans() const {
ThreadPlanStack *plans = GetProcess()->FindThreadPlans(GetID());
if (plans)
return *plans;
// History threads don't have a thread plan, but they do ask get asked to
// describe themselves, which usually involves pulling out the stop reason.
// That in turn will check for a completed plan on the ThreadPlanStack.
// Instead of special-casing at that point, we return a Stack with a
// ThreadPlanNull as its base plan. That will give the right answers to the
// queries GetDescription makes, and only assert if you try to run the thread.
if (!m_null_plan_stack_up)
m_null_plan_stack_up = std::make_unique<ThreadPlanStack>(*this, true);
return *m_null_plan_stack_up;
}
void Thread::PushPlan(ThreadPlanSP thread_plan_sp) {
assert(thread_plan_sp && "Don't push an empty thread plan.");
Log *log = GetLog(LLDBLog::Step);
if (log) {
StreamString s;
thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelFull);
LLDB_LOGF(log, "Thread::PushPlan(0x%p): \"%s\", tid = 0x%4.4" PRIx64 ".",
static_cast<void *>(this), s.GetData(),
thread_plan_sp->GetThread().GetID());
}
GetPlans().PushPlan(std::move(thread_plan_sp));
}
void Thread::PopPlan() {
Log *log = GetLog(LLDBLog::Step);
ThreadPlanSP popped_plan_sp = GetPlans().PopPlan();
if (log) {
LLDB_LOGF(log, "Popping plan: \"%s\", tid = 0x%4.4" PRIx64 ".",
popped_plan_sp->GetName(), popped_plan_sp->GetThread().GetID());
}
}
void Thread::DiscardPlan() {
Log *log = GetLog(LLDBLog::Step);
ThreadPlanSP discarded_plan_sp = GetPlans().DiscardPlan();
LLDB_LOGF(log, "Discarding plan: \"%s\", tid = 0x%4.4" PRIx64 ".",
discarded_plan_sp->GetName(),
discarded_plan_sp->GetThread().GetID());
}
void Thread::AutoCompleteThreadPlans(CompletionRequest &request) const {
const ThreadPlanStack &plans = GetPlans();
if (!plans.AnyPlans())
return;
// Iterate from the second plan (index: 1) to skip the base plan.
ThreadPlanSP p;
uint32_t i = 1;
while ((p = plans.GetPlanByIndex(i, false))) {
StreamString strm;
p->GetDescription(&strm, eDescriptionLevelInitial);
request.TryCompleteCurrentArg(std::to_string(i), strm.GetString());
i++;
}
}
ThreadPlan *Thread::GetCurrentPlan() const {
return GetPlans().GetCurrentPlan().get();
}
ThreadPlanSP Thread::GetCompletedPlan() const {
return GetPlans().GetCompletedPlan();
}
ValueObjectSP Thread::GetReturnValueObject() const {
return GetPlans().GetReturnValueObject();
}
ExpressionVariableSP Thread::GetExpressionVariable() const {
return GetPlans().GetExpressionVariable();
}
bool Thread::IsThreadPlanDone(ThreadPlan *plan) const {
return GetPlans().IsPlanDone(plan);
}
bool Thread::WasThreadPlanDiscarded(ThreadPlan *plan) const {
return GetPlans().WasPlanDiscarded(plan);
}
bool Thread::CompletedPlanOverridesBreakpoint() const {
return GetPlans().AnyCompletedPlans();
}
ThreadPlan *Thread::GetPreviousPlan(ThreadPlan *current_plan) const{
return GetPlans().GetPreviousPlan(current_plan);
}
Status Thread::QueueThreadPlan(ThreadPlanSP &thread_plan_sp,
bool abort_other_plans) {
Status status;
StreamString s;
if (!thread_plan_sp->ValidatePlan(&s)) {
DiscardThreadPlansUpToPlan(thread_plan_sp);
thread_plan_sp.reset();
return Status(s.GetString().str());
}
if (abort_other_plans)
DiscardThreadPlans(true);
PushPlan(thread_plan_sp);
// This seems a little funny, but I don't want to have to split up the
// constructor and the DidPush in the scripted plan, that seems annoying.
// That means the constructor has to be in DidPush. So I have to validate the
// plan AFTER pushing it, and then take it off again...
if (!thread_plan_sp->ValidatePlan(&s)) {
DiscardThreadPlansUpToPlan(thread_plan_sp);
thread_plan_sp.reset();
return Status(s.GetString().str());
}
return status;
}
bool Thread::DiscardUserThreadPlansUpToIndex(uint32_t plan_index) {
// Count the user thread plans from the back end to get the number of the one
// we want to discard:
ThreadPlan *up_to_plan_ptr = GetPlans().GetPlanByIndex(plan_index).get();
if (up_to_plan_ptr == nullptr)
return false;
DiscardThreadPlansUpToPlan(up_to_plan_ptr);
return true;
}
void Thread::DiscardThreadPlansUpToPlan(lldb::ThreadPlanSP &up_to_plan_sp) {
DiscardThreadPlansUpToPlan(up_to_plan_sp.get());
}
void Thread::DiscardThreadPlansUpToPlan(ThreadPlan *up_to_plan_ptr) {
Log *log = GetLog(LLDBLog::Step);
LLDB_LOGF(log,
"Discarding thread plans for thread tid = 0x%4.4" PRIx64
", up to %p",
GetID(), static_cast<void *>(up_to_plan_ptr));
GetPlans().DiscardPlansUpToPlan(up_to_plan_ptr);
}
void Thread::DiscardThreadPlans(bool force) {
Log *log = GetLog(LLDBLog::Step);
if (log) {
LLDB_LOGF(log,
"Discarding thread plans for thread (tid = 0x%4.4" PRIx64
", force %d)",
GetID(), force);
}
if (force) {
GetPlans().DiscardAllPlans();
return;
}
GetPlans().DiscardConsultingControllingPlans();
}
Status Thread::UnwindInnermostExpression() {
Status error;
ThreadPlan *innermost_expr_plan = GetPlans().GetInnermostExpression();
if (!innermost_expr_plan) {
error = Status::FromErrorString(
"No expressions currently active on this thread");
return error;
}
DiscardThreadPlansUpToPlan(innermost_expr_plan);
return error;
}
ThreadPlanSP Thread::QueueBasePlan(bool abort_other_plans) {
ThreadPlanSP thread_plan_sp(new ThreadPlanBase(*this));
QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
ThreadPlanSP Thread::QueueThreadPlanForStepSingleInstruction(
bool step_over, bool abort_other_plans, bool stop_other_threads,
Status &status) {
ThreadPlanSP thread_plan_sp(new ThreadPlanStepInstruction(
*this, step_over, stop_other_threads, eVoteNoOpinion, eVoteNoOpinion));
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
ThreadPlanSP Thread::QueueThreadPlanForStepOverRange(
bool abort_other_plans, const AddressRange &range,
const SymbolContext &addr_context, lldb::RunMode stop_other_threads,
Status &status, LazyBool step_out_avoids_code_withoug_debug_info) {
ThreadPlanSP thread_plan_sp;
thread_plan_sp = std::make_shared<ThreadPlanStepOverRange>(
*this, range, addr_context, stop_other_threads,
step_out_avoids_code_withoug_debug_info);
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
// Call the QueueThreadPlanForStepOverRange method which takes an address
// range.
ThreadPlanSP Thread::QueueThreadPlanForStepOverRange(
bool abort_other_plans, const LineEntry &line_entry,
const SymbolContext &addr_context, lldb::RunMode stop_other_threads,
Status &status, LazyBool step_out_avoids_code_withoug_debug_info) {
const bool include_inlined_functions = true;
auto address_range =
line_entry.GetSameLineContiguousAddressRange(include_inlined_functions);
return QueueThreadPlanForStepOverRange(
abort_other_plans, address_range, addr_context, stop_other_threads,
status, step_out_avoids_code_withoug_debug_info);
}
ThreadPlanSP Thread::QueueThreadPlanForStepInRange(
bool abort_other_plans, const AddressRange &range,
const SymbolContext &addr_context, const char *step_in_target,
lldb::RunMode stop_other_threads, Status &status,
LazyBool step_in_avoids_code_without_debug_info,
LazyBool step_out_avoids_code_without_debug_info) {
ThreadPlanSP thread_plan_sp(new ThreadPlanStepInRange(
*this, range, addr_context, step_in_target, stop_other_threads,
step_in_avoids_code_without_debug_info,
step_out_avoids_code_without_debug_info));
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
// Call the QueueThreadPlanForStepInRange method which takes an address range.
ThreadPlanSP Thread::QueueThreadPlanForStepInRange(
bool abort_other_plans, const LineEntry &line_entry,
const SymbolContext &addr_context, const char *step_in_target,
lldb::RunMode stop_other_threads, Status &status,
LazyBool step_in_avoids_code_without_debug_info,
LazyBool step_out_avoids_code_without_debug_info) {
const bool include_inlined_functions = false;
return QueueThreadPlanForStepInRange(
abort_other_plans,
line_entry.GetSameLineContiguousAddressRange(include_inlined_functions),
addr_context, step_in_target, stop_other_threads, status,
step_in_avoids_code_without_debug_info,
step_out_avoids_code_without_debug_info);
}
ThreadPlanSP Thread::QueueThreadPlanForStepOut(
bool abort_other_plans, SymbolContext *addr_context, bool first_insn,
bool stop_other_threads, Vote report_stop_vote, Vote report_run_vote,
uint32_t frame_idx, Status &status,
LazyBool step_out_avoids_code_without_debug_info) {
ThreadPlanSP thread_plan_sp(new ThreadPlanStepOut(
*this, addr_context, first_insn, stop_other_threads, report_stop_vote,
report_run_vote, frame_idx, step_out_avoids_code_without_debug_info));
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
ThreadPlanSP Thread::QueueThreadPlanForStepOutNoShouldStop(
bool abort_other_plans, SymbolContext *addr_context, bool first_insn,
bool stop_other_threads, Vote report_stop_vote, Vote report_run_vote,
uint32_t frame_idx, Status &status, bool continue_to_next_branch) {
const bool calculate_return_value =
false; // No need to calculate the return value here.
ThreadPlanSP thread_plan_sp(new ThreadPlanStepOut(
*this, addr_context, first_insn, stop_other_threads, report_stop_vote,
report_run_vote, frame_idx, eLazyBoolNo, continue_to_next_branch,
calculate_return_value));
ThreadPlanStepOut *new_plan =
static_cast<ThreadPlanStepOut *>(thread_plan_sp.get());
new_plan->ClearShouldStopHereCallbacks();
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
ThreadPlanSP Thread::QueueThreadPlanForStepThrough(StackID &return_stack_id,
bool abort_other_plans,
bool stop_other_threads,
Status &status) {
ThreadPlanSP thread_plan_sp(
new ThreadPlanStepThrough(*this, return_stack_id, stop_other_threads));
if (!thread_plan_sp || !thread_plan_sp->ValidatePlan(nullptr))
return ThreadPlanSP();
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
ThreadPlanSP Thread::QueueThreadPlanForRunToAddress(bool abort_other_plans,
Address &target_addr,
bool stop_other_threads,
Status &status) {
ThreadPlanSP thread_plan_sp(
new ThreadPlanRunToAddress(*this, target_addr, stop_other_threads));
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
ThreadPlanSP Thread::QueueThreadPlanForStepUntil(
bool abort_other_plans, lldb::addr_t *address_list, size_t num_addresses,
bool stop_other_threads, uint32_t frame_idx, Status &status) {
ThreadPlanSP thread_plan_sp(new ThreadPlanStepUntil(
*this, address_list, num_addresses, stop_other_threads, frame_idx));
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
lldb::ThreadPlanSP Thread::QueueThreadPlanForStepScripted(
bool abort_other_plans, const char *class_name,
StructuredData::ObjectSP extra_args_sp, bool stop_other_threads,
Status &status) {
ThreadPlanSP thread_plan_sp(new ScriptedThreadPlan(
*this, class_name, StructuredDataImpl(extra_args_sp)));
thread_plan_sp->SetStopOthers(stop_other_threads);
status = QueueThreadPlan(thread_plan_sp, abort_other_plans);
return thread_plan_sp;
}
uint32_t Thread::GetIndexID() const { return m_index_id; }
TargetSP Thread::CalculateTarget() {
TargetSP target_sp;
ProcessSP process_sp(GetProcess());
if (process_sp)
target_sp = process_sp->CalculateTarget();
return target_sp;
}
ProcessSP Thread::CalculateProcess() { return GetProcess(); }
ThreadSP Thread::CalculateThread() { return shared_from_this(); }
StackFrameSP Thread::CalculateStackFrame() { return StackFrameSP(); }
void Thread::CalculateExecutionContext(ExecutionContext &exe_ctx) {
exe_ctx.SetContext(shared_from_this());
}
StackFrameListSP Thread::GetStackFrameList() {
std::lock_guard<std::recursive_mutex> guard(m_frame_mutex);
if (!m_curr_frames_sp)
m_curr_frames_sp =
std::make_shared<StackFrameList>(*this, m_prev_frames_sp, true);
return m_curr_frames_sp;
}
std::optional<addr_t> Thread::GetPreviousFrameZeroPC() {
return m_prev_framezero_pc;
}
void Thread::ClearStackFrames() {
std::lock_guard<std::recursive_mutex> guard(m_frame_mutex);
GetUnwinder().Clear();
m_prev_framezero_pc.reset();
if (RegisterContextSP reg_ctx_sp = GetRegisterContext())
m_prev_framezero_pc = reg_ctx_sp->GetPC();
// Only store away the old "reference" StackFrameList if we got all its
// frames:
// FIXME: At some point we can try to splice in the frames we have fetched
// into the new frame as we make it, but let's not try that now.
if (m_curr_frames_sp && m_curr_frames_sp->WereAllFramesFetched())
m_prev_frames_sp.swap(m_curr_frames_sp);
m_curr_frames_sp.reset();
m_extended_info.reset();
m_extended_info_fetched = false;
}
lldb::StackFrameSP Thread::GetFrameWithConcreteFrameIndex(uint32_t unwind_idx) {
return GetStackFrameList()->GetFrameWithConcreteFrameIndex(unwind_idx);
}
Status Thread::ReturnFromFrameWithIndex(uint32_t frame_idx,
lldb::ValueObjectSP return_value_sp,
bool broadcast) {
StackFrameSP frame_sp = GetStackFrameAtIndex(frame_idx);
Status return_error;
if (!frame_sp) {
return_error = Status::FromErrorStringWithFormat(
"Could not find frame with index %d in thread 0x%" PRIx64 ".",
frame_idx, GetID());
}
return ReturnFromFrame(frame_sp, return_value_sp, broadcast);
}
Status Thread::ReturnFromFrame(lldb::StackFrameSP frame_sp,
lldb::ValueObjectSP return_value_sp,
bool broadcast) {
Status return_error;
if (!frame_sp) {
return_error = Status::FromErrorString("Can't return to a null frame.");
return return_error;
}
Thread *thread = frame_sp->GetThread().get();
uint32_t older_frame_idx = frame_sp->GetFrameIndex() + 1;
StackFrameSP older_frame_sp = thread->GetStackFrameAtIndex(older_frame_idx);
if (!older_frame_sp) {
return_error = Status::FromErrorString("No older frame to return to.");
return return_error;
}
if (return_value_sp) {
lldb::ABISP abi = thread->GetProcess()->GetABI();
if (!abi) {
return_error =
Status::FromErrorString("Could not find ABI to set return value.");
return return_error;
}
SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextFunction);
// FIXME: ValueObject::Cast doesn't currently work correctly, at least not
// for scalars.
// Turn that back on when that works.
if (/* DISABLES CODE */ (false) && sc.function != nullptr) {
Type *function_type = sc.function->GetType();
if (function_type) {
CompilerType return_type =
sc.function->GetCompilerType().GetFunctionReturnType();
if (return_type) {
StreamString s;
return_type.DumpTypeDescription(&s);
ValueObjectSP cast_value_sp = return_value_sp->Cast(return_type);
if (cast_value_sp) {
cast_value_sp->SetFormat(eFormatHex);
return_value_sp = cast_value_sp;
}
}
}
}
return_error = abi->SetReturnValueObject(older_frame_sp, return_value_sp);
if (!return_error.Success())
return return_error;
}
// Now write the return registers for the chosen frame: Note, we can't use
// ReadAllRegisterValues->WriteAllRegisterValues, since the read & write cook
// their data
StackFrameSP youngest_frame_sp = thread->GetStackFrameAtIndex(0);
if (youngest_frame_sp) {
lldb::RegisterContextSP reg_ctx_sp(youngest_frame_sp->GetRegisterContext());
if (reg_ctx_sp) {
bool copy_success = reg_ctx_sp->CopyFromRegisterContext(
older_frame_sp->GetRegisterContext());
if (copy_success) {
thread->DiscardThreadPlans(true);
thread->ClearStackFrames();
if (broadcast && EventTypeHasListeners(eBroadcastBitStackChanged)) {
auto data_sp = std::make_shared<ThreadEventData>(shared_from_this());
BroadcastEvent(eBroadcastBitStackChanged, data_sp);
}
} else {
return_error =
Status::FromErrorString("Could not reset register values.");
}
} else {
return_error = Status::FromErrorString("Frame has no register context.");
}
} else {
return_error = Status::FromErrorString("Returned past top frame.");
}
return return_error;
}
static void DumpAddressList(Stream &s, const std::vector<Address> &list,
ExecutionContextScope *exe_scope) {
for (size_t n = 0; n < list.size(); n++) {
s << "\t";
list[n].Dump(&s, exe_scope, Address::DumpStyleResolvedDescription,
Address::DumpStyleSectionNameOffset);
s << "\n";
}
}
Status Thread::JumpToLine(const FileSpec &file, uint32_t line,
bool can_leave_function, std::string *warnings) {
ExecutionContext exe_ctx(GetStackFrameAtIndex(0));
Target *target = exe_ctx.GetTargetPtr();
TargetSP target_sp = exe_ctx.GetTargetSP();
RegisterContext *reg_ctx = exe_ctx.GetRegisterContext();
StackFrame *frame = exe_ctx.GetFramePtr();
const SymbolContext &sc = frame->GetSymbolContext(eSymbolContextFunction);
// Find candidate locations.
std::vector<Address> candidates, within_function, outside_function;
target->GetImages().FindAddressesForLine(target_sp, file, line, sc.function,
within_function, outside_function);
// If possible, we try and stay within the current function. Within a
// function, we accept multiple locations (optimized code may do this,
// there's no solution here so we do the best we can). However if we're
// trying to leave the function, we don't know how to pick the right
// location, so if there's more than one then we bail.
if (!within_function.empty())
candidates = within_function;
else if (outside_function.size() == 1 && can_leave_function)
candidates = outside_function;
// Check if we got anything.
if (candidates.empty()) {
if (outside_function.empty()) {
return Status::FromErrorStringWithFormat(
"Cannot locate an address for %s:%i.", file.GetFilename().AsCString(),
line);
} else if (outside_function.size() == 1) {
return Status::FromErrorStringWithFormat(
"%s:%i is outside the current function.",
file.GetFilename().AsCString(), line);
} else {
StreamString sstr;
DumpAddressList(sstr, outside_function, target);
return Status::FromErrorStringWithFormat(
"%s:%i has multiple candidate locations:\n%s",
file.GetFilename().AsCString(), line, sstr.GetData());
}
}
// Accept the first location, warn about any others.
Address dest = candidates[0];
if (warnings && candidates.size() > 1) {
StreamString sstr;
sstr.Printf("%s:%i appears multiple times in this function, selecting the "
"first location:\n",
file.GetFilename().AsCString(), line);
DumpAddressList(sstr, candidates, target);
*warnings = std::string(sstr.GetString());
}
if (!reg_ctx->SetPC(dest))
return Status::FromErrorString("Cannot change PC to target address.");
return Status();
}
bool Thread::DumpUsingFormat(Stream &strm, uint32_t frame_idx,
const FormatEntity::Entry *format) {
ExecutionContext exe_ctx(shared_from_this());
Process *process = exe_ctx.GetProcessPtr();
if (!process || !format)
return false;
StackFrameSP frame_sp;
SymbolContext frame_sc;
if (frame_idx != LLDB_INVALID_FRAME_ID) {
frame_sp = GetStackFrameAtIndex(frame_idx);
if (frame_sp) {
exe_ctx.SetFrameSP(frame_sp);
frame_sc = frame_sp->GetSymbolContext(eSymbolContextEverything);
}
}
return FormatEntity::Format(*format, strm, frame_sp ? &frame_sc : nullptr,
&exe_ctx, nullptr, nullptr, false, false);
}
void Thread::DumpUsingSettingsFormat(Stream &strm, uint32_t frame_idx,
bool stop_format) {
ExecutionContext exe_ctx(shared_from_this());
const FormatEntity::Entry *thread_format;
if (stop_format)
thread_format = exe_ctx.GetTargetRef().GetDebugger().GetThreadStopFormat();
else
thread_format = exe_ctx.GetTargetRef().GetDebugger().GetThreadFormat();
assert(thread_format);
DumpUsingFormat(strm, frame_idx, thread_format);
}
void Thread::SettingsInitialize() {}
void Thread::SettingsTerminate() {}
lldb::addr_t Thread::GetThreadPointer() {
if (m_reg_context_sp)
return m_reg_context_sp->GetThreadPointer();
return LLDB_INVALID_ADDRESS;
}
addr_t Thread::GetThreadLocalData(const ModuleSP module,
lldb::addr_t tls_file_addr) {
// The default implementation is to ask the dynamic loader for it. This can
// be overridden for specific platforms.
DynamicLoader *loader = GetProcess()->GetDynamicLoader();
if (loader)
return loader->GetThreadLocalData(module, shared_from_this(),
tls_file_addr);
else
return LLDB_INVALID_ADDRESS;
}
bool Thread::SafeToCallFunctions() {
Process *process = GetProcess().get();
if (process) {
DynamicLoader *loader = GetProcess()->GetDynamicLoader();
if (loader && loader->IsFullyInitialized() == false)
return false;
SystemRuntime *runtime = process->GetSystemRuntime();
if (runtime) {
return runtime->SafeToCallFunctionsOnThisThread(shared_from_this());
}
}
return true;
}
lldb::StackFrameSP
Thread::GetStackFrameSPForStackFramePtr(StackFrame *stack_frame_ptr) {
return GetStackFrameList()->GetStackFrameSPForStackFramePtr(stack_frame_ptr);
}
std::string Thread::StopReasonAsString(lldb::StopReason reason) {
switch (reason) {
case eStopReasonInvalid:
return "invalid";
case eStopReasonNone:
return "none";
case eStopReasonTrace:
return "trace";
case eStopReasonBreakpoint:
return "breakpoint";
case eStopReasonWatchpoint:
return "watchpoint";
case eStopReasonSignal:
return "signal";
case eStopReasonException:
return "exception";
case eStopReasonExec:
return "exec";
case eStopReasonFork:
return "fork";
case eStopReasonVFork:
return "vfork";
case eStopReasonVForkDone:
return "vfork done";
case eStopReasonPlanComplete:
return "plan complete";
case eStopReasonThreadExiting:
return "thread exiting";
case eStopReasonInstrumentation:
return "instrumentation break";
case eStopReasonProcessorTrace:
return "processor trace";
case eStopReasonInterrupt:
return "async interrupt";
}
return "StopReason = " + std::to_string(reason);
}
std::string Thread::RunModeAsString(lldb::RunMode mode) {
switch (mode) {
case eOnlyThisThread:
return "only this thread";
case eAllThreads:
return "all threads";
case eOnlyDuringStepping:
return "only during stepping";
}
return "RunMode = " + std::to_string(mode);
}
size_t Thread::GetStatus(Stream &strm, uint32_t start_frame,
uint32_t num_frames, uint32_t num_frames_with_source,
bool stop_format, bool show_hidden, bool only_stacks) {
if (!only_stacks) {
ExecutionContext exe_ctx(shared_from_this());
Target *target = exe_ctx.GetTargetPtr();
Process *process = exe_ctx.GetProcessPtr();
strm.Indent();
bool is_selected = false;
if (process) {
if (process->GetThreadList().GetSelectedThread().get() == this)
is_selected = true;
}
strm.Printf("%c ", is_selected ? '*' : ' ');
if (target && target->GetDebugger().GetUseExternalEditor()) {
StackFrameSP frame_sp = GetStackFrameAtIndex(start_frame);
if (frame_sp) {
SymbolContext frame_sc(
frame_sp->GetSymbolContext(eSymbolContextLineEntry));
if (frame_sc.line_entry.line != 0 && frame_sc.line_entry.GetFile()) {
if (llvm::Error e = Host::OpenFileInExternalEditor(
target->GetDebugger().GetExternalEditor(),
frame_sc.line_entry.GetFile(), frame_sc.line_entry.line)) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Host), std::move(e),
"OpenFileInExternalEditor failed: {0}");
}
}
}
}
DumpUsingSettingsFormat(strm, start_frame, stop_format);
}
size_t num_frames_shown = 0;
if (num_frames > 0) {
strm.IndentMore();
const bool show_frame_info = true;
const bool show_frame_unique = only_stacks;
const char *selected_frame_marker = nullptr;
if (num_frames == 1 || only_stacks ||
(GetID() != GetProcess()->GetThreadList().GetSelectedThread()->GetID()))
strm.IndentMore();
else
selected_frame_marker = "* ";
num_frames_shown = GetStackFrameList()->GetStatus(
strm, start_frame, num_frames, show_frame_info, num_frames_with_source,
show_frame_unique, show_hidden, selected_frame_marker);
if (num_frames == 1)
strm.IndentLess();
strm.IndentLess();
}
return num_frames_shown;
}
bool Thread::GetDescription(Stream &strm, lldb::DescriptionLevel level,
bool print_json_thread, bool print_json_stopinfo) {
const bool stop_format = false;
DumpUsingSettingsFormat(strm, 0, stop_format);
strm.Printf("\n");
StructuredData::ObjectSP thread_info = GetExtendedInfo();
if (print_json_thread || print_json_stopinfo) {
if (thread_info && print_json_thread) {
thread_info->Dump(strm);
strm.Printf("\n");
}
if (print_json_stopinfo && m_stop_info_sp) {
StructuredData::ObjectSP stop_info = m_stop_info_sp->GetExtendedInfo();
if (stop_info) {
stop_info->Dump(strm);
strm.Printf("\n");
}
}
return true;
}
if (thread_info) {
StructuredData::ObjectSP activity =
thread_info->GetObjectForDotSeparatedPath("activity");
StructuredData::ObjectSP breadcrumb =
thread_info->GetObjectForDotSeparatedPath("breadcrumb");
StructuredData::ObjectSP messages =
thread_info->GetObjectForDotSeparatedPath("trace_messages");
bool printed_activity = false;
if (activity && activity->GetType() == eStructuredDataTypeDictionary) {
StructuredData::Dictionary *activity_dict = activity->GetAsDictionary();
StructuredData::ObjectSP id = activity_dict->GetValueForKey("id");
StructuredData::ObjectSP name = activity_dict->GetValueForKey("name");
if (name && name->GetType() == eStructuredDataTypeString && id &&
id->GetType() == eStructuredDataTypeInteger) {
strm.Format(" Activity '{0}', {1:x}\n",
name->GetAsString()->GetValue(),
id->GetUnsignedIntegerValue());
}
printed_activity = true;
}
bool printed_breadcrumb = false;
if (breadcrumb && breadcrumb->GetType() == eStructuredDataTypeDictionary) {
if (printed_activity)
strm.Printf("\n");
StructuredData::Dictionary *breadcrumb_dict =
breadcrumb->GetAsDictionary();
StructuredData::ObjectSP breadcrumb_text =
breadcrumb_dict->GetValueForKey("name");
if (breadcrumb_text &&
breadcrumb_text->GetType() == eStructuredDataTypeString) {
strm.Format(" Current Breadcrumb: {0}\n",
breadcrumb_text->GetAsString()->GetValue());
}
printed_breadcrumb = true;
}
if (messages && messages->GetType() == eStructuredDataTypeArray) {
if (printed_breadcrumb)
strm.Printf("\n");
StructuredData::Array *messages_array = messages->GetAsArray();
const size_t msg_count = messages_array->GetSize();
if (msg_count > 0) {
strm.Printf(" %zu trace messages:\n", msg_count);
for (size_t i = 0; i < msg_count; i++) {
StructuredData::ObjectSP message = messages_array->GetItemAtIndex(i);
if (message && message->GetType() == eStructuredDataTypeDictionary) {
StructuredData::Dictionary *message_dict =
message->GetAsDictionary();
StructuredData::ObjectSP message_text =
message_dict->GetValueForKey("message");
if (message_text &&
message_text->GetType() == eStructuredDataTypeString) {
strm.Format(" {0}\n", message_text->GetAsString()->GetValue());
}
}
}
}
}
}
return true;
}
size_t Thread::GetStackFrameStatus(Stream &strm, uint32_t first_frame,
uint32_t num_frames, bool show_frame_info,
uint32_t num_frames_with_source,
bool show_hidden) {
return GetStackFrameList()->GetStatus(strm, first_frame, num_frames,
show_frame_info, num_frames_with_source,
/*show_unique*/ false, show_hidden);
}
Unwind &Thread::GetUnwinder() {
if (!m_unwinder_up)
m_unwinder_up = std::make_unique<UnwindLLDB>(*this);
return *m_unwinder_up;
}
void Thread::Flush() {
ClearStackFrames();
m_reg_context_sp.reset();
m_stopped_at_unexecuted_bp = LLDB_INVALID_ADDRESS;
}
bool Thread::IsStillAtLastBreakpointHit() {
// If we are currently stopped at a breakpoint, always return that stopinfo
// and don't reset it. This allows threads to maintain their breakpoint
// stopinfo, such as when thread-stepping in multithreaded programs.
if (m_stop_info_sp) {
StopReason stop_reason = m_stop_info_sp->GetStopReason();
if (stop_reason == lldb::eStopReasonBreakpoint) {
uint64_t value = m_stop_info_sp->GetValue();
lldb::RegisterContextSP reg_ctx_sp(GetRegisterContext());
if (reg_ctx_sp) {
lldb::addr_t pc = reg_ctx_sp->GetPC();
BreakpointSiteSP bp_site_sp =
GetProcess()->GetBreakpointSiteList().FindByAddress(pc);
if (bp_site_sp && static_cast<break_id_t>(value) == bp_site_sp->GetID())
return true;
}
}
}
return false;
}
Status Thread::StepIn(bool source_step,
LazyBool step_in_avoids_code_without_debug_info,
LazyBool step_out_avoids_code_without_debug_info)
{
Status error;
Process *process = GetProcess().get();
if (StateIsStoppedState(process->GetState(), true)) {
StackFrameSP frame_sp = GetStackFrameAtIndex(0);
ThreadPlanSP new_plan_sp;
const lldb::RunMode run_mode = eOnlyThisThread;
const bool abort_other_plans = false;
if (source_step && frame_sp && frame_sp->HasDebugInformation()) {
SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything));
new_plan_sp = QueueThreadPlanForStepInRange(
abort_other_plans, sc.line_entry, sc, nullptr, run_mode, error,
step_in_avoids_code_without_debug_info,
step_out_avoids_code_without_debug_info);
} else {
new_plan_sp = QueueThreadPlanForStepSingleInstruction(
false, abort_other_plans, run_mode, error);
}
new_plan_sp->SetIsControllingPlan(true);
new_plan_sp->SetOkayToDiscard(false);
// Why do we need to set the current thread by ID here???
process->GetThreadList().SetSelectedThreadByID(GetID());
error = process->Resume();
} else {
error = Status::FromErrorString("process not stopped");
}
return error;
}
Status Thread::StepOver(bool source_step,
LazyBool step_out_avoids_code_without_debug_info) {
Status error;
Process *process = GetProcess().get();
if (StateIsStoppedState(process->GetState(), true)) {
StackFrameSP frame_sp = GetStackFrameAtIndex(0);
ThreadPlanSP new_plan_sp;
const lldb::RunMode run_mode = eOnlyThisThread;
const bool abort_other_plans = false;
if (source_step && frame_sp && frame_sp->HasDebugInformation()) {
SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything));
new_plan_sp = QueueThreadPlanForStepOverRange(
abort_other_plans, sc.line_entry, sc, run_mode, error,
step_out_avoids_code_without_debug_info);
} else {
new_plan_sp = QueueThreadPlanForStepSingleInstruction(
true, abort_other_plans, run_mode, error);
}
new_plan_sp->SetIsControllingPlan(true);
new_plan_sp->SetOkayToDiscard(false);
// Why do we need to set the current thread by ID here???
process->GetThreadList().SetSelectedThreadByID(GetID());
error = process->Resume();
} else {
error = Status::FromErrorString("process not stopped");
}
return error;
}
Status Thread::StepOut(uint32_t frame_idx) {
Status error;
Process *process = GetProcess().get();
if (StateIsStoppedState(process->GetState(), true)) {
const bool first_instruction = false;
const bool stop_other_threads = false;
const bool abort_other_plans = false;
ThreadPlanSP new_plan_sp(QueueThreadPlanForStepOut(
abort_other_plans, nullptr, first_instruction, stop_other_threads,
eVoteYes, eVoteNoOpinion, frame_idx, error));
new_plan_sp->SetIsControllingPlan(true);
new_plan_sp->SetOkayToDiscard(false);
// Why do we need to set the current thread by ID here???
process->GetThreadList().SetSelectedThreadByID(GetID());
error = process->Resume();
} else {
error = Status::FromErrorString("process not stopped");
}
return error;
}
ValueObjectSP Thread::GetCurrentException() {
if (auto frame_sp = GetStackFrameAtIndex(0))
if (auto recognized_frame = frame_sp->GetRecognizedFrame())
if (auto e = recognized_frame->GetExceptionObject())
return e;
// NOTE: Even though this behavior is generalized, only ObjC is actually
// supported at the moment.
for (LanguageRuntime *runtime : GetProcess()->GetLanguageRuntimes()) {
if (auto e = runtime->GetExceptionObjectForThread(shared_from_this()))
return e;
}
return ValueObjectSP();
}
ThreadSP Thread::GetCurrentExceptionBacktrace() {
ValueObjectSP exception = GetCurrentException();
if (!exception)
return ThreadSP();
// NOTE: Even though this behavior is generalized, only ObjC is actually
// supported at the moment.
for (LanguageRuntime *runtime : GetProcess()->GetLanguageRuntimes()) {
if (auto bt = runtime->GetBacktraceThreadFromException(exception))
return bt;
}
return ThreadSP();
}
lldb::ValueObjectSP Thread::GetSiginfoValue() {
ProcessSP process_sp = GetProcess();
assert(process_sp);
Target &target = process_sp->GetTarget();
PlatformSP platform_sp = target.GetPlatform();
assert(platform_sp);
ArchSpec arch = target.GetArchitecture();
CompilerType type = platform_sp->GetSiginfoType(arch.GetTriple());
if (!type.IsValid())
return ValueObjectConstResult::Create(
&target, Status::FromErrorString("no siginfo_t for the platform"));
auto type_size_or_err = type.GetByteSize(nullptr);
if (!type_size_or_err)
return ValueObjectConstResult::Create(
&target, Status::FromError(type_size_or_err.takeError()));
llvm::Expected<std::unique_ptr<llvm::MemoryBuffer>> data =
GetSiginfo(*type_size_or_err);
if (!data)
return ValueObjectConstResult::Create(&target,
Status::FromError(data.takeError()));
DataExtractor data_extractor{data.get()->getBufferStart(), data.get()->getBufferSize(),
process_sp->GetByteOrder(), arch.GetAddressByteSize()};
return ValueObjectConstResult::Create(&target, type, ConstString("__lldb_siginfo"), data_extractor);
}
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