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llvm/lldb/source/Breakpoint/BreakpointOptions.cpp
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo 
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

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//===-- BreakpointOptions.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/Breakpoint/BreakpointOptions.h"
#include "lldb/Breakpoint/StoppointCallbackContext.h"
#include "lldb/Core/Value.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/ThreadSpec.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/StringList.h"
#include "llvm/ADT/STLExtras.h"
using namespace lldb;
using namespace lldb_private;
const char
*BreakpointOptions::CommandData::g_option_names[static_cast<uint32_t>(
BreakpointOptions::CommandData::OptionNames::LastOptionName)]{
"UserSource", "ScriptSource", "StopOnError"};
StructuredData::ObjectSP
BreakpointOptions::CommandData::SerializeToStructuredData() {
size_t num_strings = user_source.GetSize();
if (num_strings == 0 && script_source.empty()) {
// We shouldn't serialize commands if there aren't any, return an empty sp
// to indicate this.
return StructuredData::ObjectSP();
}
StructuredData::DictionarySP options_dict_sp(
new StructuredData::Dictionary());
options_dict_sp->AddBooleanItem(GetKey(OptionNames::StopOnError),
stop_on_error);
StructuredData::ArraySP user_source_sp(new StructuredData::Array());
for (size_t i = 0; i < num_strings; i++) {
StructuredData::StringSP item_sp(
new StructuredData::String(user_source[i]));
user_source_sp->AddItem(item_sp);
options_dict_sp->AddItem(GetKey(OptionNames::UserSource), user_source_sp);
}
options_dict_sp->AddStringItem(
GetKey(OptionNames::Interpreter),
ScriptInterpreter::LanguageToString(interpreter));
return options_dict_sp;
}
std::unique_ptr<BreakpointOptions::CommandData>
BreakpointOptions::CommandData::CreateFromStructuredData(
const StructuredData::Dictionary &options_dict, Status &error) {
std::unique_ptr<CommandData> data_up(new CommandData());
bool found_something = false;
bool success = options_dict.GetValueForKeyAsBoolean(
GetKey(OptionNames::StopOnError), data_up->stop_on_error);
if (success)
found_something = true;
llvm::StringRef interpreter_str;
ScriptLanguage interp_language;
success = options_dict.GetValueForKeyAsString(
GetKey(OptionNames::Interpreter), interpreter_str);
if (!success) {
error.SetErrorString("Missing command language value.");
return data_up;
}
found_something = true;
interp_language = ScriptInterpreter::StringToLanguage(interpreter_str);
if (interp_language == eScriptLanguageUnknown) {
error.SetErrorStringWithFormatv("Unknown breakpoint command language: {0}.",
interpreter_str);
return data_up;
}
data_up->interpreter = interp_language;
StructuredData::Array *user_source;
success = options_dict.GetValueForKeyAsArray(GetKey(OptionNames::UserSource),
user_source);
if (success) {
found_something = true;
size_t num_elems = user_source->GetSize();
for (size_t i = 0; i < num_elems; i++) {
llvm::StringRef elem_string;
success = user_source->GetItemAtIndexAsString(i, elem_string);
if (success)
data_up->user_source.AppendString(elem_string);
}
}
if (found_something)
return data_up;
else
return std::unique_ptr<BreakpointOptions::CommandData>();
}
const char *BreakpointOptions::g_option_names[(
size_t)BreakpointOptions::OptionNames::LastOptionName]{
"ConditionText", "IgnoreCount",
"EnabledState", "OneShotState", "AutoContinue"};
bool BreakpointOptions::NullCallback(void *baton,
StoppointCallbackContext *context,
lldb::user_id_t break_id,
lldb::user_id_t break_loc_id) {
return true;
}
//----------------------------------------------------------------------
// BreakpointOptions constructor
//----------------------------------------------------------------------
BreakpointOptions::BreakpointOptions(bool all_flags_set)
: m_callback(BreakpointOptions::NullCallback), m_callback_baton_sp(),
m_baton_is_command_baton(false), m_callback_is_synchronous(false),
m_enabled(true), m_one_shot(false), m_ignore_count(0), m_thread_spec_ap(),
m_condition_text(), m_condition_text_hash(0), m_auto_continue(false),
m_set_flags(0) {
if (all_flags_set)
m_set_flags.Set(~((Flags::ValueType) 0));
}
BreakpointOptions::BreakpointOptions(const char *condition, bool enabled,
int32_t ignore, bool one_shot,
bool auto_continue)
: m_callback(nullptr), m_baton_is_command_baton(false),
m_callback_is_synchronous(false), m_enabled(enabled),
m_one_shot(one_shot), m_ignore_count(ignore),
m_condition_text_hash(0), m_auto_continue(auto_continue)
{
m_set_flags.Set(eEnabled | eIgnoreCount | eOneShot
| eAutoContinue);
if (condition && *condition != '\0') {
SetCondition(condition);
}
}
//----------------------------------------------------------------------
// BreakpointOptions copy constructor
//----------------------------------------------------------------------
BreakpointOptions::BreakpointOptions(const BreakpointOptions &rhs)
: m_callback(rhs.m_callback), m_callback_baton_sp(rhs.m_callback_baton_sp),
m_baton_is_command_baton(rhs.m_baton_is_command_baton),
m_callback_is_synchronous(rhs.m_callback_is_synchronous),
m_enabled(rhs.m_enabled), m_one_shot(rhs.m_one_shot),
m_ignore_count(rhs.m_ignore_count), m_thread_spec_ap(),
m_auto_continue(rhs.m_auto_continue),
m_set_flags(rhs.m_set_flags) {
if (rhs.m_thread_spec_ap.get() != nullptr)
m_thread_spec_ap.reset(new ThreadSpec(*rhs.m_thread_spec_ap.get()));
m_condition_text = rhs.m_condition_text;
m_condition_text_hash = rhs.m_condition_text_hash;
}
//----------------------------------------------------------------------
// BreakpointOptions assignment operator
//----------------------------------------------------------------------
const BreakpointOptions &BreakpointOptions::
operator=(const BreakpointOptions &rhs) {
m_callback = rhs.m_callback;
m_callback_baton_sp = rhs.m_callback_baton_sp;
m_baton_is_command_baton = rhs.m_baton_is_command_baton;
m_callback_is_synchronous = rhs.m_callback_is_synchronous;
m_enabled = rhs.m_enabled;
m_one_shot = rhs.m_one_shot;
m_ignore_count = rhs.m_ignore_count;
if (rhs.m_thread_spec_ap.get() != nullptr)
m_thread_spec_ap.reset(new ThreadSpec(*rhs.m_thread_spec_ap.get()));
m_condition_text = rhs.m_condition_text;
m_condition_text_hash = rhs.m_condition_text_hash;
m_auto_continue = rhs.m_auto_continue;
m_set_flags = rhs.m_set_flags;
return *this;
}
void BreakpointOptions::CopyOverSetOptions(const BreakpointOptions &incoming)
{
if (incoming.m_set_flags.Test(eEnabled))
{
m_enabled = incoming.m_enabled;
m_set_flags.Set(eEnabled);
}
if (incoming.m_set_flags.Test(eOneShot))
{
m_one_shot = incoming.m_one_shot;
m_set_flags.Set(eOneShot);
}
if (incoming.m_set_flags.Test(eCallback))
{
m_callback = incoming.m_callback;
m_callback_baton_sp = incoming.m_callback_baton_sp;
m_callback_is_synchronous = incoming.m_callback_is_synchronous;
m_baton_is_command_baton = incoming.m_baton_is_command_baton;
m_set_flags.Set(eCallback);
}
if (incoming.m_set_flags.Test(eIgnoreCount))
{
m_ignore_count = incoming.m_ignore_count;
m_set_flags.Set(eIgnoreCount);
}
if (incoming.m_set_flags.Test(eCondition))
{
// If we're copying over an empty condition, mark it as unset.
if (incoming.m_condition_text.empty()) {
m_condition_text.clear();
m_condition_text_hash = 0;
m_set_flags.Clear(eCondition);
} else {
m_condition_text = incoming.m_condition_text;
m_condition_text_hash = incoming.m_condition_text_hash;
m_set_flags.Set(eCondition);
}
}
if (incoming.m_set_flags.Test(eAutoContinue))
{
m_auto_continue = incoming.m_auto_continue;
m_set_flags.Set(eAutoContinue);
}
if (incoming.m_set_flags.Test(eThreadSpec) && incoming.m_thread_spec_ap)
{
if (!m_thread_spec_ap)
m_thread_spec_ap.reset(new ThreadSpec(*incoming.m_thread_spec_ap.get()));
else
*m_thread_spec_ap.get() = *incoming.m_thread_spec_ap.get();
m_set_flags.Set(eThreadSpec);
}
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
BreakpointOptions::~BreakpointOptions() = default;
std::unique_ptr<BreakpointOptions> BreakpointOptions::CreateFromStructuredData(
Target &target, const StructuredData::Dictionary &options_dict,
Status &error) {
bool enabled = true;
bool one_shot = false;
bool auto_continue = false;
int32_t ignore_count = 0;
llvm::StringRef condition_ref("");
Flags set_options;
const char *key = GetKey(OptionNames::EnabledState);
bool success;
if (key) {
success = options_dict.GetValueForKeyAsBoolean(key, enabled);
if (!success) {
error.SetErrorStringWithFormat("%s key is not a boolean.",
GetKey(OptionNames::EnabledState));
return nullptr;
}
set_options.Set(eEnabled);
}
key = GetKey(OptionNames::OneShotState);
if (key) {
success = options_dict.GetValueForKeyAsBoolean(key, one_shot);
if (!success) {
error.SetErrorStringWithFormat("%s key is not a boolean.",
GetKey(OptionNames::OneShotState));
return nullptr;
}
set_options.Set(eOneShot);
}
key = GetKey(OptionNames::AutoContinue);
if (key) {
success = options_dict.GetValueForKeyAsBoolean(key, auto_continue);
if (!success) {
error.SetErrorStringWithFormat("%s key is not a boolean.",
GetKey(OptionNames::AutoContinue));
return nullptr;
}
set_options.Set(eAutoContinue);
}
key = GetKey(OptionNames::IgnoreCount);
if (key) {
success = options_dict.GetValueForKeyAsInteger(key, ignore_count);
if (!success) {
error.SetErrorStringWithFormat("%s key is not an integer.",
GetKey(OptionNames::IgnoreCount));
return nullptr;
}
set_options.Set(eIgnoreCount);
}
key = GetKey(OptionNames::ConditionText);
if (key) {
success = options_dict.GetValueForKeyAsString(key, condition_ref);
if (!success) {
error.SetErrorStringWithFormat("%s key is not an string.",
GetKey(OptionNames::ConditionText));
return nullptr;
}
set_options.Set(eCondition);
}
std::unique_ptr<CommandData> cmd_data_up;
StructuredData::Dictionary *cmds_dict;
success = options_dict.GetValueForKeyAsDictionary(
CommandData::GetSerializationKey(), cmds_dict);
if (success && cmds_dict) {
Status cmds_error;
cmd_data_up = CommandData::CreateFromStructuredData(*cmds_dict, cmds_error);
if (cmds_error.Fail()) {
error.SetErrorStringWithFormat(
"Failed to deserialize breakpoint command options: %s.",
cmds_error.AsCString());
return nullptr;
}
}
auto bp_options = llvm::make_unique<BreakpointOptions>(
condition_ref.str().c_str(), enabled,
ignore_count, one_shot, auto_continue);
if (cmd_data_up.get()) {
if (cmd_data_up->interpreter == eScriptLanguageNone)
bp_options->SetCommandDataCallback(cmd_data_up);
else {
ScriptInterpreter *interp =
target.GetDebugger().GetCommandInterpreter().GetScriptInterpreter();
if (!interp) {
error.SetErrorStringWithFormat(
"Can't set script commands - no script interpreter");
return nullptr;
}
if (interp->GetLanguage() != cmd_data_up->interpreter) {
error.SetErrorStringWithFormat(
"Current script language doesn't match breakpoint's language: %s",
ScriptInterpreter::LanguageToString(cmd_data_up->interpreter)
.c_str());
return nullptr;
}
Status script_error;
script_error =
interp->SetBreakpointCommandCallback(bp_options.get(), cmd_data_up);
if (script_error.Fail()) {
error.SetErrorStringWithFormat("Error generating script callback: %s.",
error.AsCString());
return nullptr;
}
}
}
StructuredData::Dictionary *thread_spec_dict;
success = options_dict.GetValueForKeyAsDictionary(
ThreadSpec::GetSerializationKey(), thread_spec_dict);
if (success) {
Status thread_spec_error;
std::unique_ptr<ThreadSpec> thread_spec_up =
ThreadSpec::CreateFromStructuredData(*thread_spec_dict,
thread_spec_error);
if (thread_spec_error.Fail()) {
error.SetErrorStringWithFormat(
"Failed to deserialize breakpoint thread spec options: %s.",
thread_spec_error.AsCString());
return nullptr;
}
bp_options->SetThreadSpec(thread_spec_up);
}
return bp_options;
}
StructuredData::ObjectSP BreakpointOptions::SerializeToStructuredData() {
StructuredData::DictionarySP options_dict_sp(
new StructuredData::Dictionary());
if (m_set_flags.Test(eEnabled))
options_dict_sp->AddBooleanItem(GetKey(OptionNames::EnabledState),
m_enabled);
if (m_set_flags.Test(eOneShot))
options_dict_sp->AddBooleanItem(GetKey(OptionNames::OneShotState),
m_one_shot);
if (m_set_flags.Test(eAutoContinue))
options_dict_sp->AddBooleanItem(GetKey(OptionNames::AutoContinue),
m_auto_continue);
if (m_set_flags.Test(eIgnoreCount))
options_dict_sp->AddIntegerItem(GetKey(OptionNames::IgnoreCount),
m_ignore_count);
if (m_set_flags.Test(eCondition))
options_dict_sp->AddStringItem(GetKey(OptionNames::ConditionText),
m_condition_text);
if (m_set_flags.Test(eCallback) && m_baton_is_command_baton) {
auto cmd_baton =
std::static_pointer_cast<CommandBaton>(m_callback_baton_sp);
StructuredData::ObjectSP commands_sp =
cmd_baton->getItem()->SerializeToStructuredData();
if (commands_sp) {
options_dict_sp->AddItem(
BreakpointOptions::CommandData::GetSerializationKey(), commands_sp);
}
}
if (m_set_flags.Test(eThreadSpec) && m_thread_spec_ap) {
StructuredData::ObjectSP thread_spec_sp =
m_thread_spec_ap->SerializeToStructuredData();
options_dict_sp->AddItem(ThreadSpec::GetSerializationKey(), thread_spec_sp);
}
return options_dict_sp;
}
//------------------------------------------------------------------
// Callbacks
//------------------------------------------------------------------
void BreakpointOptions::SetCallback(BreakpointHitCallback callback,
const lldb::BatonSP &callback_baton_sp,
bool callback_is_synchronous) {
// FIXME: This seems unsafe. If BatonSP actually *is* a CommandBaton, but
// in a shared_ptr<Baton> instead of a shared_ptr<CommandBaton>, then we will
// set m_baton_is_command_baton to false, which is incorrect. One possible
// solution is to make the base Baton class provide a method such as:
// virtual StringRef getBatonId() const { return ""; }
// and have CommandBaton override this to return something unique, and then
// check for it here. Another option might be to make Baton using the llvm
// casting infrastructure, so that we could write something like:
// if (llvm::isa<CommandBaton>(callback_baton_sp))
// at relevant callsites instead of storing a boolean.
m_callback_is_synchronous = callback_is_synchronous;
m_callback = callback;
m_callback_baton_sp = callback_baton_sp;
m_baton_is_command_baton = false;
m_set_flags.Set(eCallback);
}
void BreakpointOptions::SetCallback(
BreakpointHitCallback callback,
const BreakpointOptions::CommandBatonSP &callback_baton_sp,
bool callback_is_synchronous) {
m_callback_is_synchronous = callback_is_synchronous;
m_callback = callback;
m_callback_baton_sp = callback_baton_sp;
m_baton_is_command_baton = true;
m_set_flags.Set(eCallback);
}
void BreakpointOptions::ClearCallback() {
m_callback = BreakpointOptions::NullCallback;
m_callback_is_synchronous = false;
m_callback_baton_sp.reset();
m_baton_is_command_baton = false;
m_set_flags.Clear(eCallback);
}
Baton *BreakpointOptions::GetBaton() { return m_callback_baton_sp.get(); }
const Baton *BreakpointOptions::GetBaton() const {
return m_callback_baton_sp.get();
}
bool BreakpointOptions::InvokeCallback(StoppointCallbackContext *context,
lldb::user_id_t break_id,
lldb::user_id_t break_loc_id) {
if (m_callback) {
if (context->is_synchronous == IsCallbackSynchronous()) {
return m_callback(m_callback_baton_sp ? m_callback_baton_sp->data()
: nullptr,
context, break_id, break_loc_id);
} else if (IsCallbackSynchronous()) {
// If a synchronous callback is called at async time, it should not say
// to stop.
return false;
}
}
return true;
}
bool BreakpointOptions::HasCallback() const {
return m_callback != BreakpointOptions::NullCallback;
}
bool BreakpointOptions::GetCommandLineCallbacks(StringList &command_list) {
if (!HasCallback())
return false;
if (!m_baton_is_command_baton)
return false;
auto cmd_baton = std::static_pointer_cast<CommandBaton>(m_callback_baton_sp);
CommandData *data = cmd_baton->getItem();
if (!data)
return false;
command_list = data->user_source;
return true;
}
void BreakpointOptions::SetCondition(const char *condition) {
if (!condition || condition[0] == '\0') {
condition = "";
m_set_flags.Clear(eCondition);
}
else
m_set_flags.Set(eCondition);
m_condition_text.assign(condition);
std::hash<std::string> hasher;
m_condition_text_hash = hasher(m_condition_text);
}
const char *BreakpointOptions::GetConditionText(size_t *hash) const {
if (!m_condition_text.empty()) {
if (hash)
*hash = m_condition_text_hash;
return m_condition_text.c_str();
} else {
return nullptr;
}
}
const ThreadSpec *BreakpointOptions::GetThreadSpecNoCreate() const {
return m_thread_spec_ap.get();
}
ThreadSpec *BreakpointOptions::GetThreadSpec() {
if (m_thread_spec_ap.get() == nullptr)
{
m_set_flags.Set(eThreadSpec);
m_thread_spec_ap.reset(new ThreadSpec());
}
return m_thread_spec_ap.get();
}
void BreakpointOptions::SetThreadID(lldb::tid_t thread_id) {
GetThreadSpec()->SetTID(thread_id);
m_set_flags.Set(eThreadSpec);
}
void BreakpointOptions::SetThreadSpec(
std::unique_ptr<ThreadSpec> &thread_spec_up) {
m_thread_spec_ap = std::move(thread_spec_up);
m_set_flags.Set(eThreadSpec);
}
void BreakpointOptions::GetDescription(Stream *s,
lldb::DescriptionLevel level) const {
// Figure out if there are any options not at their default value, and only
// print anything if there are:
if (m_ignore_count != 0 || !m_enabled || m_one_shot || m_auto_continue ||
(GetThreadSpecNoCreate() != nullptr &&
GetThreadSpecNoCreate()->HasSpecification())) {
if (level == lldb::eDescriptionLevelVerbose) {
s->EOL();
s->IndentMore();
s->Indent();
s->PutCString("Breakpoint Options:\n");
s->IndentMore();
s->Indent();
} else
s->PutCString(" Options: ");
if (m_ignore_count > 0)
s->Printf("ignore: %d ", m_ignore_count);
s->Printf("%sabled ", m_enabled ? "en" : "dis");
if (m_one_shot)
s->Printf("one-shot ");
if (m_auto_continue)
s->Printf("auto-continue ");
if (m_thread_spec_ap.get())
m_thread_spec_ap->GetDescription(s, level);
if (level == lldb::eDescriptionLevelFull) {
s->IndentLess();
s->IndentMore();
}
}
if (m_callback_baton_sp.get()) {
if (level != eDescriptionLevelBrief) {
s->EOL();
m_callback_baton_sp->GetDescription(s, level);
}
}
if (!m_condition_text.empty()) {
if (level != eDescriptionLevelBrief) {
s->EOL();
s->Printf("Condition: %s\n", m_condition_text.c_str());
}
}
}
void BreakpointOptions::CommandBaton::GetDescription(
Stream *s, lldb::DescriptionLevel level) const {
const CommandData *data = getItem();
if (level == eDescriptionLevelBrief) {
s->Printf(", commands = %s",
(data && data->user_source.GetSize() > 0) ? "yes" : "no");
return;
}
s->IndentMore();
s->Indent("Breakpoint commands");
if (data->interpreter != eScriptLanguageNone)
s->Printf(" (%s):\n",
ScriptInterpreter::LanguageToString(data->interpreter).c_str());
else
s->PutCString(":\n");
s->IndentMore();
if (data && data->user_source.GetSize() > 0) {
const size_t num_strings = data->user_source.GetSize();
for (size_t i = 0; i < num_strings; ++i) {
s->Indent(data->user_source.GetStringAtIndex(i));
s->EOL();
}
} else {
s->PutCString("No commands.\n");
}
s->IndentLess();
s->IndentLess();
}
void BreakpointOptions::SetCommandDataCallback(
std::unique_ptr<CommandData> &cmd_data) {
cmd_data->interpreter = eScriptLanguageNone;
auto baton_sp = std::make_shared<CommandBaton>(std::move(cmd_data));
SetCallback(BreakpointOptions::BreakpointOptionsCallbackFunction, baton_sp);
m_set_flags.Set(eCallback);
}
bool BreakpointOptions::BreakpointOptionsCallbackFunction(
void *baton, StoppointCallbackContext *context, lldb::user_id_t break_id,
lldb::user_id_t break_loc_id) {
bool ret_value = true;
if (baton == nullptr)
return true;
CommandData *data = (CommandData *)baton;
StringList &commands = data->user_source;
if (commands.GetSize() > 0) {
ExecutionContext exe_ctx(context->exe_ctx_ref);
Target *target = exe_ctx.GetTargetPtr();
if (target) {
CommandReturnObject result;
Debugger &debugger = target->GetDebugger();
// Rig up the results secondary output stream to the debugger's, so the
// output will come out synchronously if the debugger is set up that way.
StreamSP output_stream(debugger.GetAsyncOutputStream());
StreamSP error_stream(debugger.GetAsyncErrorStream());
result.SetImmediateOutputStream(output_stream);
result.SetImmediateErrorStream(error_stream);
CommandInterpreterRunOptions options;
options.SetStopOnContinue(true);
options.SetStopOnError(data->stop_on_error);
options.SetEchoCommands(true);
options.SetPrintResults(true);
options.SetAddToHistory(false);
debugger.GetCommandInterpreter().HandleCommands(commands, &exe_ctx,
options, result);
result.GetImmediateOutputStream()->Flush();
result.GetImmediateErrorStream()->Flush();
}
}
return ret_value;
}
void BreakpointOptions::Clear()
{
m_set_flags.Clear();
m_thread_spec_ap.release();
m_one_shot = false;
m_ignore_count = 0;
m_auto_continue = false;
m_callback = nullptr;
m_callback_baton_sp.reset();
m_baton_is_command_baton = false;
m_callback_is_synchronous = false;
m_enabled = false;
m_condition_text.clear();
}
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