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llvm-project/lldb/source/Core/Debugger.cpp

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//===-- Debugger.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/Core/Debugger.h"
#include "lldb/Breakpoint/Breakpoint.h"
#include "lldb/Core/FormatEntity.h"
#include "lldb/Core/Mangled.h"
#include "lldb/Core/ModuleList.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/StreamAsynchronousIO.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/DataFormatters/DataVisualization.h"
#include "lldb/Expression/REPL.h"
#include "lldb/Host/File.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/Terminal.h"
#include "lldb/Host/ThreadLauncher.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/OptionValue.h"
#include "lldb/Interpreter/OptionValueProperties.h"
#include "lldb/Interpreter/OptionValueSInt64.h"
#include "lldb/Interpreter/OptionValueString.h"
#include "lldb/Interpreter/Property.h"
#include "lldb/Interpreter/ScriptInterpreter.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Target/Language.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/StructuredDataPlugin.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/TargetList.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadList.h"
#include "lldb/Utility/AnsiTerminal.h"
#include "lldb/Utility/Event.h"
#include "lldb/Utility/Listener.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Reproducer.h"
#include "lldb/Utility/State.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/StreamCallback.h"
#include "lldb/Utility/StreamString.h"
#if defined(_WIN32)
#include "lldb/Host/windows/PosixApi.h"
#include "lldb/Host/windows/windows.h"
#endif
#include "llvm/ADT/None.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Threading.h"
#include "llvm/Support/raw_ostream.h"
#include <list>
#include <memory>
#include <mutex>
#include <set>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <system_error>
namespace lldb_private {
class Address;
}
using namespace lldb;
using namespace lldb_private;
static lldb::user_id_t g_unique_id = 1;
static size_t g_debugger_event_thread_stack_bytes = 8 * 1024 * 1024;
#pragma mark Static Functions
typedef std::vector<DebuggerSP> DebuggerList;
static std::recursive_mutex *g_debugger_list_mutex_ptr =
nullptr; // NOTE: intentional leak to avoid issues with C++ destructor chain
static DebuggerList *g_debugger_list_ptr =
nullptr; // NOTE: intentional leak to avoid issues with C++ destructor chain
static constexpr OptionEnumValueElement g_show_disassembly_enum_values[] = {
{
Debugger::eStopDisassemblyTypeNever,
"never",
"Never show disassembly when displaying a stop context.",
},
{
Debugger::eStopDisassemblyTypeNoDebugInfo,
"no-debuginfo",
"Show disassembly when there is no debug information.",
},
{
Debugger::eStopDisassemblyTypeNoSource,
"no-source",
"Show disassembly when there is no source information, or the source "
"file "
"is missing when displaying a stop context.",
},
{
Debugger::eStopDisassemblyTypeAlways,
"always",
"Always show disassembly when displaying a stop context.",
},
};
static constexpr OptionEnumValueElement g_language_enumerators[] = {
{
eScriptLanguageNone,
"none",
"Disable scripting languages.",
},
{
eScriptLanguagePython,
"python",
"Select python as the default scripting language.",
},
{
eScriptLanguageDefault,
"default",
"Select the lldb default as the default scripting language.",
},
};
#define MODULE_WITH_FUNC \
"{ " \
"${module.file.basename}{`${function.name-with-args}" \
"{${frame.no-debug}${function.pc-offset}}}}"
#define MODULE_WITH_FUNC_NO_ARGS \
"{ " \
"${module.file.basename}{`${function.name-without-args}" \
"{${frame.no-debug}${function.pc-offset}}}}"
#define FILE_AND_LINE \
"{ at ${ansi.fg.cyan}${line.file.basename}${ansi.normal}" \
":${ansi.fg.yellow}${line.number}${ansi.normal}" \
"{:${ansi.fg.yellow}${line.column}${ansi.normal}}}"
#define IS_OPTIMIZED "{${function.is-optimized} [opt]}"
#define IS_ARTIFICIAL "{${frame.is-artificial} [artificial]}"
#define DEFAULT_THREAD_FORMAT \
"thread #${thread.index}: tid = ${thread.id%tid}" \
"{, ${frame.pc}}" MODULE_WITH_FUNC FILE_AND_LINE \
"{, name = ${ansi.fg.green}'${thread.name}'${ansi.normal}}" \
"{, queue = ${ansi.fg.green}'${thread.queue}'${ansi.normal}}" \
"{, activity = " \
"${ansi.fg.green}'${thread.info.activity.name}'${ansi.normal}}" \
"{, ${thread.info.trace_messages} messages}" \
"{, stop reason = ${ansi.fg.red}${thread.stop-reason}${ansi.normal}}" \
"{\\nReturn value: ${thread.return-value}}" \
"{\\nCompleted expression: ${thread.completed-expression}}" \
"\\n"
#define DEFAULT_THREAD_STOP_FORMAT \
"thread #${thread.index}{, name = '${thread.name}'}" \
"{, queue = ${ansi.fg.green}'${thread.queue}'${ansi.normal}}" \
"{, activity = " \
"${ansi.fg.green}'${thread.info.activity.name}'${ansi.normal}}" \
"{, ${thread.info.trace_messages} messages}" \
"{, stop reason = ${ansi.fg.red}${thread.stop-reason}${ansi.normal}}" \
"{\\nReturn value: ${thread.return-value}}" \
"{\\nCompleted expression: ${thread.completed-expression}}" \
"\\n"
#define DEFAULT_FRAME_FORMAT \
"frame #${frame.index}: " \
"${ansi.fg.yellow}${frame.pc}${ansi.normal}" MODULE_WITH_FUNC FILE_AND_LINE \
IS_OPTIMIZED IS_ARTIFICIAL "\\n"
#define DEFAULT_FRAME_FORMAT_NO_ARGS \
"frame #${frame.index}: " \
"${ansi.fg.yellow}${frame.pc}${ansi.normal}" MODULE_WITH_FUNC_NO_ARGS \
FILE_AND_LINE IS_OPTIMIZED IS_ARTIFICIAL "\\n"
// Three parts to this disassembly format specification:
// 1. If this is a new function/symbol (no previous symbol/function), print
// dylib`funcname:\n
// 2. If this is a symbol context change (different from previous
// symbol/function), print
// dylib`funcname:\n
// 3. print
// address <+offset>:
#define DEFAULT_DISASSEMBLY_FORMAT \
"{${function.initial-function}{${module.file.basename}`}{${function.name-" \
"without-args}}:\\n}{${function.changed}\\n{${module.file.basename}`}{${" \
"function.name-without-args}}:\\n}{${current-pc-arrow} " \
"}${addr-file-or-load}{ " \
"<${function.concrete-only-addr-offset-no-padding}>}: "
// gdb's disassembly format can be emulated with ${current-pc-arrow}${addr-
// file-or-load}{ <${function.name-without-args}${function.concrete-only-addr-
// offset-no-padding}>}:
// lldb's original format for disassembly would look like this format string -
// {${function.initial-function}{${module.file.basename}`}{${function.name-
// without-
// args}}:\n}{${function.changed}\n{${module.file.basename}`}{${function.name-
// without-args}}:\n}{${current-pc-arrow} }{${addr-file-or-load}}:
static constexpr OptionEnumValueElement s_stop_show_column_values[] = {
{
eStopShowColumnAnsiOrCaret,
"ansi-or-caret",
"Highlight the stop column with ANSI terminal codes when color/ANSI "
"mode is enabled; otherwise, fall back to using a text-only caret (^) "
"as if \"caret-only\" mode was selected.",
},
{
eStopShowColumnAnsi,
"ansi",
"Highlight the stop column with ANSI terminal codes when running LLDB "
"with color/ANSI enabled.",
},
{
eStopShowColumnCaret,
"caret",
"Highlight the stop column with a caret character (^) underneath the "
"stop column. This method introduces a new line in source listings "
"that display thread stop locations.",
},
{
eStopShowColumnNone,
"none",
"Do not highlight the stop column.",
},
};
#define LLDB_PROPERTIES_debugger
#include "CoreProperties.inc"
enum {
#define LLDB_PROPERTIES_debugger
#include "CorePropertiesEnum.inc"
};
LoadPluginCallbackType Debugger::g_load_plugin_callback = nullptr;
Status Debugger::SetPropertyValue(const ExecutionContext *exe_ctx,
VarSetOperationType op,
llvm::StringRef property_path,
llvm::StringRef value) {
bool is_load_script =
(property_path == "target.load-script-from-symbol-file");
// These properties might change how we visualize data.
bool invalidate_data_vis = (property_path == "escape-non-printables");
invalidate_data_vis |=
(property_path == "target.max-zero-padding-in-float-format");
if (invalidate_data_vis) {
DataVisualization::ForceUpdate();
}
TargetSP target_sp;
LoadScriptFromSymFile load_script_old_value;
if (is_load_script && exe_ctx->GetTargetSP()) {
target_sp = exe_ctx->GetTargetSP();
load_script_old_value =
target_sp->TargetProperties::GetLoadScriptFromSymbolFile();
}
Status error(Properties::SetPropertyValue(exe_ctx, op, property_path, value));
if (error.Success()) {
// FIXME it would be nice to have "on-change" callbacks for properties
if (property_path == g_debugger_properties[ePropertyPrompt].name) {
llvm::StringRef new_prompt = GetPrompt();
std::string str = lldb_private::ansi::FormatAnsiTerminalCodes(
new_prompt, GetUseColor());
if (str.length())
new_prompt = str;
GetCommandInterpreter().UpdatePrompt(new_prompt);
auto bytes = std::make_unique<EventDataBytes>(new_prompt);
auto prompt_change_event_sp = std::make_shared<Event>(
CommandInterpreter::eBroadcastBitResetPrompt, bytes.release());
GetCommandInterpreter().BroadcastEvent(prompt_change_event_sp);
} else if (property_path == g_debugger_properties[ePropertyUseColor].name) {
// use-color changed. Ping the prompt so it can reset the ansi terminal
// codes.
SetPrompt(GetPrompt());
} else if (is_load_script && target_sp &&
load_script_old_value == eLoadScriptFromSymFileWarn) {
if (target_sp->TargetProperties::GetLoadScriptFromSymbolFile() ==
eLoadScriptFromSymFileTrue) {
std::list<Status> errors;
StreamString feedback_stream;
if (!target_sp->LoadScriptingResources(errors, &feedback_stream)) {
Stream &s = GetErrorStream();
for (auto error : errors) {
s.Printf("%s\n", error.AsCString());
}
if (feedback_stream.GetSize())
s.PutCString(feedback_stream.GetString());
}
}
}
}
return error;
}
bool Debugger::GetAutoConfirm() const {
const uint32_t idx = ePropertyAutoConfirm;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_debugger_properties[idx].default_uint_value != 0);
}
const FormatEntity::Entry *Debugger::GetDisassemblyFormat() const {
const uint32_t idx = ePropertyDisassemblyFormat;
return m_collection_sp->GetPropertyAtIndexAsFormatEntity(nullptr, idx);
}
const FormatEntity::Entry *Debugger::GetFrameFormat() const {
const uint32_t idx = ePropertyFrameFormat;
return m_collection_sp->GetPropertyAtIndexAsFormatEntity(nullptr, idx);
}
const FormatEntity::Entry *Debugger::GetFrameFormatUnique() const {
const uint32_t idx = ePropertyFrameFormatUnique;
return m_collection_sp->GetPropertyAtIndexAsFormatEntity(nullptr, idx);
}
bool Debugger::GetNotifyVoid() const {
const uint32_t idx = ePropertyNotiftVoid;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_debugger_properties[idx].default_uint_value != 0);
}
llvm::StringRef Debugger::GetPrompt() const {
const uint32_t idx = ePropertyPrompt;
return m_collection_sp->GetPropertyAtIndexAsString(
nullptr, idx, g_debugger_properties[idx].default_cstr_value);
}
void Debugger::SetPrompt(llvm::StringRef p) {
const uint32_t idx = ePropertyPrompt;
m_collection_sp->SetPropertyAtIndexAsString(nullptr, idx, p);
llvm::StringRef new_prompt = GetPrompt();
std::string str =
lldb_private::ansi::FormatAnsiTerminalCodes(new_prompt, GetUseColor());
if (str.length())
new_prompt = str;
GetCommandInterpreter().UpdatePrompt(new_prompt);
}
llvm::StringRef Debugger::GetReproducerPath() const {
auto &r = repro::Reproducer::Instance();
return r.GetReproducerPath().GetCString();
}
const FormatEntity::Entry *Debugger::GetThreadFormat() const {
const uint32_t idx = ePropertyThreadFormat;
return m_collection_sp->GetPropertyAtIndexAsFormatEntity(nullptr, idx);
}
const FormatEntity::Entry *Debugger::GetThreadStopFormat() const {
const uint32_t idx = ePropertyThreadStopFormat;
return m_collection_sp->GetPropertyAtIndexAsFormatEntity(nullptr, idx);
}
lldb::ScriptLanguage Debugger::GetScriptLanguage() const {
const uint32_t idx = ePropertyScriptLanguage;
return (lldb::ScriptLanguage)m_collection_sp->GetPropertyAtIndexAsEnumeration(
nullptr, idx, g_debugger_properties[idx].default_uint_value);
}
bool Debugger::SetScriptLanguage(lldb::ScriptLanguage script_lang) {
const uint32_t idx = ePropertyScriptLanguage;
return m_collection_sp->SetPropertyAtIndexAsEnumeration(nullptr, idx,
script_lang);
}
uint32_t Debugger::GetTerminalWidth() const {
const uint32_t idx = ePropertyTerminalWidth;
return m_collection_sp->GetPropertyAtIndexAsSInt64(
nullptr, idx, g_debugger_properties[idx].default_uint_value);
}
bool Debugger::SetTerminalWidth(uint32_t term_width) {
const uint32_t idx = ePropertyTerminalWidth;
return m_collection_sp->SetPropertyAtIndexAsSInt64(nullptr, idx, term_width);
}
bool Debugger::GetUseExternalEditor() const {
const uint32_t idx = ePropertyUseExternalEditor;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_debugger_properties[idx].default_uint_value != 0);
}
bool Debugger::SetUseExternalEditor(bool b) {
const uint32_t idx = ePropertyUseExternalEditor;
return m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}
bool Debugger::GetUseColor() const {
const uint32_t idx = ePropertyUseColor;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_debugger_properties[idx].default_uint_value != 0);
}
bool Debugger::SetUseColor(bool b) {
const uint32_t idx = ePropertyUseColor;
bool ret = m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
SetPrompt(GetPrompt());
return ret;
}
bool Debugger::GetHighlightSource() const {
const uint32_t idx = ePropertyHighlightSource;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_debugger_properties[idx].default_uint_value);
}
StopShowColumn Debugger::GetStopShowColumn() const {
const uint32_t idx = ePropertyStopShowColumn;
return (lldb::StopShowColumn)m_collection_sp->GetPropertyAtIndexAsEnumeration(
nullptr, idx, g_debugger_properties[idx].default_uint_value);
}
llvm::StringRef Debugger::GetStopShowColumnAnsiPrefix() const {
const uint32_t idx = ePropertyStopShowColumnAnsiPrefix;
return m_collection_sp->GetPropertyAtIndexAsString(nullptr, idx, "");
}
llvm::StringRef Debugger::GetStopShowColumnAnsiSuffix() const {
const uint32_t idx = ePropertyStopShowColumnAnsiSuffix;
return m_collection_sp->GetPropertyAtIndexAsString(nullptr, idx, "");
}
uint32_t Debugger::GetStopSourceLineCount(bool before) const {
const uint32_t idx =
before ? ePropertyStopLineCountBefore : ePropertyStopLineCountAfter;
return m_collection_sp->GetPropertyAtIndexAsSInt64(
nullptr, idx, g_debugger_properties[idx].default_uint_value);
}
Debugger::StopDisassemblyType Debugger::GetStopDisassemblyDisplay() const {
const uint32_t idx = ePropertyStopDisassemblyDisplay;
return (Debugger::StopDisassemblyType)
m_collection_sp->GetPropertyAtIndexAsEnumeration(
nullptr, idx, g_debugger_properties[idx].default_uint_value);
}
uint32_t Debugger::GetDisassemblyLineCount() const {
const uint32_t idx = ePropertyStopDisassemblyCount;
return m_collection_sp->GetPropertyAtIndexAsSInt64(
nullptr, idx, g_debugger_properties[idx].default_uint_value);
}
bool Debugger::GetAutoOneLineSummaries() const {
const uint32_t idx = ePropertyAutoOneLineSummaries;
return m_collection_sp->GetPropertyAtIndexAsBoolean(nullptr, idx, true);
}
bool Debugger::GetEscapeNonPrintables() const {
const uint32_t idx = ePropertyEscapeNonPrintables;
return m_collection_sp->GetPropertyAtIndexAsBoolean(nullptr, idx, true);
}
bool Debugger::GetAutoIndent() const {
const uint32_t idx = ePropertyAutoIndent;
return m_collection_sp->GetPropertyAtIndexAsBoolean(nullptr, idx, true);
}
bool Debugger::SetAutoIndent(bool b) {
const uint32_t idx = ePropertyAutoIndent;
return m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}
bool Debugger::GetPrintDecls() const {
const uint32_t idx = ePropertyPrintDecls;
return m_collection_sp->GetPropertyAtIndexAsBoolean(nullptr, idx, true);
}
bool Debugger::SetPrintDecls(bool b) {
const uint32_t idx = ePropertyPrintDecls;
return m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}
uint32_t Debugger::GetTabSize() const {
const uint32_t idx = ePropertyTabSize;
return m_collection_sp->GetPropertyAtIndexAsUInt64(
nullptr, idx, g_debugger_properties[idx].default_uint_value);
}
bool Debugger::SetTabSize(uint32_t tab_size) {
const uint32_t idx = ePropertyTabSize;
return m_collection_sp->SetPropertyAtIndexAsUInt64(nullptr, idx, tab_size);
}
#pragma mark Debugger
// const DebuggerPropertiesSP &
// Debugger::GetSettings() const
//{
// return m_properties_sp;
//}
//
void Debugger::Initialize(LoadPluginCallbackType load_plugin_callback) {
assert(g_debugger_list_ptr == nullptr &&
"Debugger::Initialize called more than once!");
g_debugger_list_mutex_ptr = new std::recursive_mutex();
g_debugger_list_ptr = new DebuggerList();
g_load_plugin_callback = load_plugin_callback;
}
void Debugger::Terminate() {
assert(g_debugger_list_ptr &&
"Debugger::Terminate called without a matching Debugger::Initialize!");
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
// Clear our master list of debugger objects
{
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
for (const auto &debugger : *g_debugger_list_ptr)
debugger->Clear();
g_debugger_list_ptr->clear();
}
}
}
void Debugger::SettingsInitialize() { Target::SettingsInitialize(); }
void Debugger::SettingsTerminate() { Target::SettingsTerminate(); }
bool Debugger::LoadPlugin(const FileSpec &spec, Status &error) {
if (g_load_plugin_callback) {
llvm::sys::DynamicLibrary dynlib =
g_load_plugin_callback(shared_from_this(), spec, error);
if (dynlib.isValid()) {
m_loaded_plugins.push_back(dynlib);
return true;
}
} else {
// The g_load_plugin_callback is registered in SBDebugger::Initialize() and
// if the public API layer isn't available (code is linking against all of
// the internal LLDB static libraries), then we can't load plugins
error.SetErrorString("Public API layer is not available");
}
return false;
}
static FileSystem::EnumerateDirectoryResult
LoadPluginCallback(void *baton, llvm::sys::fs::file_type ft,
llvm::StringRef path) {
Status error;
static ConstString g_dylibext(".dylib");
static ConstString g_solibext(".so");
if (!baton)
return FileSystem::eEnumerateDirectoryResultQuit;
Debugger *debugger = (Debugger *)baton;
namespace fs = llvm::sys::fs;
// If we have a regular file, a symbolic link or unknown file type, try and
// process the file. We must handle unknown as sometimes the directory
// enumeration might be enumerating a file system that doesn't have correct
// file type information.
if (ft == fs::file_type::regular_file || ft == fs::file_type::symlink_file ||
ft == fs::file_type::type_unknown) {
FileSpec plugin_file_spec(path);
FileSystem::Instance().Resolve(plugin_file_spec);
if (plugin_file_spec.GetFileNameExtension() != g_dylibext &&
plugin_file_spec.GetFileNameExtension() != g_solibext) {
return FileSystem::eEnumerateDirectoryResultNext;
}
Status plugin_load_error;
debugger->LoadPlugin(plugin_file_spec, plugin_load_error);
return FileSystem::eEnumerateDirectoryResultNext;
} else if (ft == fs::file_type::directory_file ||
ft == fs::file_type::symlink_file ||
ft == fs::file_type::type_unknown) {
// Try and recurse into anything that a directory or symbolic link. We must
// also do this for unknown as sometimes the directory enumeration might be
// enumerating a file system that doesn't have correct file type
// information.
return FileSystem::eEnumerateDirectoryResultEnter;
}
return FileSystem::eEnumerateDirectoryResultNext;
}
void Debugger::InstanceInitialize() {
const bool find_directories = true;
const bool find_files = true;
const bool find_other = true;
char dir_path[PATH_MAX];
if (FileSpec dir_spec = HostInfo::GetSystemPluginDir()) {
if (FileSystem::Instance().Exists(dir_spec) &&
dir_spec.GetPath(dir_path, sizeof(dir_path))) {
FileSystem::Instance().EnumerateDirectory(dir_path, find_directories,
find_files, find_other,
LoadPluginCallback, this);
}
}
if (FileSpec dir_spec = HostInfo::GetUserPluginDir()) {
if (FileSystem::Instance().Exists(dir_spec) &&
dir_spec.GetPath(dir_path, sizeof(dir_path))) {
FileSystem::Instance().EnumerateDirectory(dir_path, find_directories,
find_files, find_other,
LoadPluginCallback, this);
}
}
PluginManager::DebuggerInitialize(*this);
}
DebuggerSP Debugger::CreateInstance(lldb::LogOutputCallback log_callback,
void *baton) {
DebuggerSP debugger_sp(new Debugger(log_callback, baton));
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
g_debugger_list_ptr->push_back(debugger_sp);
}
debugger_sp->InstanceInitialize();
return debugger_sp;
}
void Debugger::Destroy(DebuggerSP &debugger_sp) {
if (!debugger_sp)
return;
debugger_sp->Clear();
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
DebuggerList::iterator pos, end = g_debugger_list_ptr->end();
for (pos = g_debugger_list_ptr->begin(); pos != end; ++pos) {
if ((*pos).get() == debugger_sp.get()) {
g_debugger_list_ptr->erase(pos);
return;
}
}
}
}
DebuggerSP Debugger::FindDebuggerWithInstanceName(ConstString instance_name) {
DebuggerSP debugger_sp;
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
DebuggerList::iterator pos, end = g_debugger_list_ptr->end();
for (pos = g_debugger_list_ptr->begin(); pos != end; ++pos) {
if ((*pos)->m_instance_name == instance_name) {
debugger_sp = *pos;
break;
}
}
}
return debugger_sp;
}
TargetSP Debugger::FindTargetWithProcessID(lldb::pid_t pid) {
TargetSP target_sp;
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
DebuggerList::iterator pos, end = g_debugger_list_ptr->end();
for (pos = g_debugger_list_ptr->begin(); pos != end; ++pos) {
target_sp = (*pos)->GetTargetList().FindTargetWithProcessID(pid);
if (target_sp)
break;
}
}
return target_sp;
}
TargetSP Debugger::FindTargetWithProcess(Process *process) {
TargetSP target_sp;
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
DebuggerList::iterator pos, end = g_debugger_list_ptr->end();
for (pos = g_debugger_list_ptr->begin(); pos != end; ++pos) {
target_sp = (*pos)->GetTargetList().FindTargetWithProcess(process);
if (target_sp)
break;
}
}
return target_sp;
}
Debugger::Debugger(lldb::LogOutputCallback log_callback, void *baton)
: UserID(g_unique_id++),
Properties(std::make_shared<OptionValueProperties>()),
m_input_file_sp(std::make_shared<NativeFile>(stdin, false)),
m_output_stream_sp(std::make_shared<StreamFile>(stdout, false)),
m_error_stream_sp(std::make_shared<StreamFile>(stderr, false)),
m_input_recorder(nullptr),
m_broadcaster_manager_sp(BroadcasterManager::MakeBroadcasterManager()),
m_terminal_state(), m_target_list(*this), m_platform_list(),
m_listener_sp(Listener::MakeListener("lldb.Debugger")),
m_source_manager_up(), m_source_file_cache(),
m_command_interpreter_up(
std::make_unique<CommandInterpreter>(*this, false)),
m_script_interpreter_sp(), m_input_reader_stack(), m_instance_name(),
m_loaded_plugins(), m_event_handler_thread(), m_io_handler_thread(),
m_sync_broadcaster(nullptr, "lldb.debugger.sync"),
m_forward_listener_sp(), m_clear_once() {
char instance_cstr[256];
snprintf(instance_cstr, sizeof(instance_cstr), "debugger_%d", (int)GetID());
m_instance_name.SetCString(instance_cstr);
if (log_callback)
m_log_callback_stream_sp =
std::make_shared<StreamCallback>(log_callback, baton);
m_command_interpreter_up->Initialize();
// Always add our default platform to the platform list
PlatformSP default_platform_sp(Platform::GetHostPlatform());
assert(default_platform_sp);
m_platform_list.Append(default_platform_sp, true);
m_dummy_target_sp = m_target_list.GetDummyTarget(*this);
assert(m_dummy_target_sp.get() && "Couldn't construct dummy target?");
m_collection_sp->Initialize(g_debugger_properties);
m_collection_sp->AppendProperty(
ConstString("target"),
ConstString("Settings specify to debugging targets."), true,
Target::GetGlobalProperties()->GetValueProperties());
m_collection_sp->AppendProperty(
ConstString("platform"), ConstString("Platform settings."), true,
Platform::GetGlobalPlatformProperties()->GetValueProperties());
m_collection_sp->AppendProperty(
ConstString("symbols"), ConstString("Symbol lookup and cache settings."),
true, ModuleList::GetGlobalModuleListProperties().GetValueProperties());
if (m_command_interpreter_up) {
m_collection_sp->AppendProperty(
ConstString("interpreter"),
ConstString("Settings specify to the debugger's command interpreter."),
true, m_command_interpreter_up->GetValueProperties());
}
OptionValueSInt64 *term_width =
m_collection_sp->GetPropertyAtIndexAsOptionValueSInt64(
nullptr, ePropertyTerminalWidth);
term_width->SetMinimumValue(10);
term_width->SetMaximumValue(1024);
// Turn off use-color if this is a dumb terminal.
const char *term = getenv("TERM");
if (term && !strcmp(term, "dumb"))
SetUseColor(false);
// Turn off use-color if we don't write to a terminal with color support.
if (!GetOutputFile().GetIsTerminalWithColors())
SetUseColor(false);
#if defined(_WIN32) && defined(ENABLE_VIRTUAL_TERMINAL_PROCESSING)
// Enabling use of ANSI color codes because LLDB is using them to highlight
// text.
llvm::sys::Process::UseANSIEscapeCodes(true);
#endif
}
Debugger::~Debugger() { Clear(); }
void Debugger::Clear() {
// Make sure we call this function only once. With the C++ global destructor
// chain having a list of debuggers and with code that can be running on
// other threads, we need to ensure this doesn't happen multiple times.
//
// The following functions call Debugger::Clear():
// Debugger::~Debugger();
// static void Debugger::Destroy(lldb::DebuggerSP &debugger_sp);
// static void Debugger::Terminate();
llvm::call_once(m_clear_once, [this]() {
ClearIOHandlers();
StopIOHandlerThread();
StopEventHandlerThread();
m_listener_sp->Clear();
int num_targets = m_target_list.GetNumTargets();
for (int i = 0; i < num_targets; i++) {
TargetSP target_sp(m_target_list.GetTargetAtIndex(i));
if (target_sp) {
ProcessSP process_sp(target_sp->GetProcessSP());
if (process_sp)
process_sp->Finalize();
target_sp->Destroy();
}
}
m_broadcaster_manager_sp->Clear();
// Close the input file _before_ we close the input read communications
// class as it does NOT own the input file, our m_input_file does.
m_terminal_state.Clear();
GetInputFile().Close();
m_command_interpreter_up->Clear();
});
}
bool Debugger::GetCloseInputOnEOF() const {
// return m_input_comm.GetCloseOnEOF();
return false;
}
void Debugger::SetCloseInputOnEOF(bool b) {
// m_input_comm.SetCloseOnEOF(b);
}
bool Debugger::GetAsyncExecution() {
return !m_command_interpreter_up->GetSynchronous();
}
void Debugger::SetAsyncExecution(bool async_execution) {
m_command_interpreter_up->SetSynchronous(!async_execution);
}
repro::DataRecorder *Debugger::GetInputRecorder() { return m_input_recorder; }
void Debugger::SetInputFile(FileSP file_sp, repro::DataRecorder *recorder) {
assert(file_sp && file_sp->IsValid());
m_input_recorder = recorder;
m_input_file_sp = file_sp;
// Save away the terminal state if that is relevant, so that we can restore
// it in RestoreInputState.
SaveInputTerminalState();
}
void Debugger::SetOutputFile(FileSP file_sp) {
assert(file_sp && file_sp->IsValid());
m_output_stream_sp = std::make_shared<StreamFile>(file_sp);
}
void Debugger::SetErrorFile(FileSP file_sp) {
assert(file_sp && file_sp->IsValid());
m_error_stream_sp = std::make_shared<StreamFile>(file_sp);
}
void Debugger::SaveInputTerminalState() {
int fd = GetInputFile().GetDescriptor();
if (fd != File::kInvalidDescriptor)
m_terminal_state.Save(fd, true);
}
void Debugger::RestoreInputTerminalState() { m_terminal_state.Restore(); }
ExecutionContext Debugger::GetSelectedExecutionContext() {
ExecutionContext exe_ctx;
TargetSP target_sp(GetSelectedTarget());
exe_ctx.SetTargetSP(target_sp);
if (target_sp) {
ProcessSP process_sp(target_sp->GetProcessSP());
exe_ctx.SetProcessSP(process_sp);
if (process_sp && !process_sp->IsRunning()) {
ThreadSP thread_sp(process_sp->GetThreadList().GetSelectedThread());
if (thread_sp) {
exe_ctx.SetThreadSP(thread_sp);
exe_ctx.SetFrameSP(thread_sp->GetSelectedFrame());
if (exe_ctx.GetFramePtr() == nullptr)
exe_ctx.SetFrameSP(thread_sp->GetStackFrameAtIndex(0));
}
}
}
return exe_ctx;
}
void Debugger::DispatchInputInterrupt() {
std::lock_guard<std::recursive_mutex> guard(m_input_reader_stack.GetMutex());
IOHandlerSP reader_sp(m_input_reader_stack.Top());
if (reader_sp)
reader_sp->Interrupt();
}
void Debugger::DispatchInputEndOfFile() {
std::lock_guard<std::recursive_mutex> guard(m_input_reader_stack.GetMutex());
IOHandlerSP reader_sp(m_input_reader_stack.Top());
if (reader_sp)
reader_sp->GotEOF();
}
void Debugger::ClearIOHandlers() {
// The bottom input reader should be the main debugger input reader. We do
// not want to close that one here.
std::lock_guard<std::recursive_mutex> guard(m_input_reader_stack.GetMutex());
while (m_input_reader_stack.GetSize() > 1) {
IOHandlerSP reader_sp(m_input_reader_stack.Top());
if (reader_sp)
PopIOHandler(reader_sp);
}
}
void Debugger::ExecuteIOHandlers() {
while (true) {
IOHandlerSP reader_sp(m_input_reader_stack.Top());
if (!reader_sp)
break;
reader_sp->Run();
// Remove all input readers that are done from the top of the stack
while (true) {
IOHandlerSP top_reader_sp = m_input_reader_stack.Top();
if (top_reader_sp && top_reader_sp->GetIsDone())
PopIOHandler(top_reader_sp);
else
break;
}
}
ClearIOHandlers();
}
bool Debugger::IsTopIOHandler(const lldb::IOHandlerSP &reader_sp) {
return m_input_reader_stack.IsTop(reader_sp);
}
bool Debugger::CheckTopIOHandlerTypes(IOHandler::Type top_type,
IOHandler::Type second_top_type) {
return m_input_reader_stack.CheckTopIOHandlerTypes(top_type, second_top_type);
}
void Debugger::PrintAsync(const char *s, size_t len, bool is_stdout) {
lldb_private::StreamFile &stream =
is_stdout ? GetOutputStream() : GetErrorStream();
m_input_reader_stack.PrintAsync(&stream, s, len);
}
ConstString Debugger::GetTopIOHandlerControlSequence(char ch) {
return m_input_reader_stack.GetTopIOHandlerControlSequence(ch);
}
const char *Debugger::GetIOHandlerCommandPrefix() {
return m_input_reader_stack.GetTopIOHandlerCommandPrefix();
}
const char *Debugger::GetIOHandlerHelpPrologue() {
return m_input_reader_stack.GetTopIOHandlerHelpPrologue();
}
void Debugger::RunIOHandler(const IOHandlerSP &reader_sp) {
PushIOHandler(reader_sp);
IOHandlerSP top_reader_sp = reader_sp;
while (top_reader_sp) {
top_reader_sp->Run();
if (top_reader_sp.get() == reader_sp.get()) {
if (PopIOHandler(reader_sp))
break;
}
while (true) {
top_reader_sp = m_input_reader_stack.Top();
if (top_reader_sp && top_reader_sp->GetIsDone())
PopIOHandler(top_reader_sp);
else
break;
}
}
}
void Debugger::AdoptTopIOHandlerFilesIfInvalid(FileSP &in, StreamFileSP &out,
StreamFileSP &err) {
// Before an IOHandler runs, it must have in/out/err streams. This function
// is called when one ore more of the streams are nullptr. We use the top
// input reader's in/out/err streams, or fall back to the debugger file
// handles, or we fall back onto stdin/stdout/stderr as a last resort.
std::lock_guard<std::recursive_mutex> guard(m_input_reader_stack.GetMutex());
IOHandlerSP top_reader_sp(m_input_reader_stack.Top());
// If no STDIN has been set, then set it appropriately
if (!in) {
if (top_reader_sp)
in = top_reader_sp->GetInputFileSP();
else
in = GetInputFileSP();
// If there is nothing, use stdin
if (!in)
in = std::make_shared<NativeFile>(stdin, false);
}
// If no STDOUT has been set, then set it appropriately
if (!out) {
if (top_reader_sp)
out = top_reader_sp->GetOutputStreamFileSP();
else
out = GetOutputStreamSP();
// If there is nothing, use stdout
if (!out)
out = std::make_shared<StreamFile>(stdout, false);
}
// If no STDERR has been set, then set it appropriately
if (!err) {
if (top_reader_sp)
err = top_reader_sp->GetErrorStreamFileSP();
else
err = GetErrorStreamSP();
// If there is nothing, use stderr
if (!err)
err = std::make_shared<StreamFile>(stderr, false);
}
}
void Debugger::PushIOHandler(const IOHandlerSP &reader_sp,
bool cancel_top_handler) {
if (!reader_sp)
return;
std::lock_guard<std::recursive_mutex> guard(m_input_reader_stack.GetMutex());
// Get the current top input reader...
IOHandlerSP top_reader_sp(m_input_reader_stack.Top());
// Don't push the same IO handler twice...
if (reader_sp == top_reader_sp)
return;
// Push our new input reader
m_input_reader_stack.Push(reader_sp);
reader_sp->Activate();
// Interrupt the top input reader to it will exit its Run() function and let
// this new input reader take over
if (top_reader_sp) {
top_reader_sp->Deactivate();
if (cancel_top_handler)
top_reader_sp->Cancel();
}
}
bool Debugger::PopIOHandler(const IOHandlerSP &pop_reader_sp) {
if (!pop_reader_sp)
return false;
std::lock_guard<std::recursive_mutex> guard(m_input_reader_stack.GetMutex());
// The reader on the stop of the stack is done, so let the next read on the
// stack refresh its prompt and if there is one...
if (m_input_reader_stack.IsEmpty())
return false;
IOHandlerSP reader_sp(m_input_reader_stack.Top());
if (pop_reader_sp != reader_sp)
return false;
reader_sp->Deactivate();
reader_sp->Cancel();
m_input_reader_stack.Pop();
reader_sp = m_input_reader_stack.Top();
if (reader_sp)
reader_sp->Activate();
return true;
}
StreamSP Debugger::GetAsyncOutputStream() {
return std::make_shared<StreamAsynchronousIO>(*this, true);
}
StreamSP Debugger::GetAsyncErrorStream() {
return std::make_shared<StreamAsynchronousIO>(*this, false);
}
size_t Debugger::GetNumDebuggers() {
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
return g_debugger_list_ptr->size();
}
return 0;
}
lldb::DebuggerSP Debugger::GetDebuggerAtIndex(size_t index) {
DebuggerSP debugger_sp;
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
if (index < g_debugger_list_ptr->size())
debugger_sp = g_debugger_list_ptr->at(index);
}
return debugger_sp;
}
DebuggerSP Debugger::FindDebuggerWithID(lldb::user_id_t id) {
DebuggerSP debugger_sp;
if (g_debugger_list_ptr && g_debugger_list_mutex_ptr) {
std::lock_guard<std::recursive_mutex> guard(*g_debugger_list_mutex_ptr);
DebuggerList::iterator pos, end = g_debugger_list_ptr->end();
for (pos = g_debugger_list_ptr->begin(); pos != end; ++pos) {
if ((*pos)->GetID() == id) {
debugger_sp = *pos;
break;
}
}
}
return debugger_sp;
}
bool Debugger::FormatDisassemblerAddress(const FormatEntity::Entry *format,
const SymbolContext *sc,
const SymbolContext *prev_sc,
const ExecutionContext *exe_ctx,
const Address *addr, Stream &s) {
FormatEntity::Entry format_entry;
if (format == nullptr) {
if (exe_ctx != nullptr && exe_ctx->HasTargetScope())
format = exe_ctx->GetTargetRef().GetDebugger().GetDisassemblyFormat();
if (format == nullptr) {
FormatEntity::Parse("${addr}: ", format_entry);
format = &format_entry;
}
}
bool function_changed = false;
bool initial_function = false;
if (prev_sc && (prev_sc->function || prev_sc->symbol)) {
if (sc && (sc->function || sc->symbol)) {
if (prev_sc->symbol && sc->symbol) {
if (!sc->symbol->Compare(prev_sc->symbol->GetName(),
prev_sc->symbol->GetType())) {
function_changed = true;
}
} else if (prev_sc->function && sc->function) {
if (prev_sc->function->GetMangled() != sc->function->GetMangled()) {
function_changed = true;
}
}
}
}
// The first context on a list of instructions will have a prev_sc that has
// no Function or Symbol -- if SymbolContext had an IsValid() method, it
// would return false. But we do get a prev_sc pointer.
if ((sc && (sc->function || sc->symbol)) && prev_sc &&
(prev_sc->function == nullptr && prev_sc->symbol == nullptr)) {
initial_function = true;
}
return FormatEntity::Format(*format, s, sc, exe_ctx, addr, nullptr,
function_changed, initial_function);
}
void Debugger::SetLoggingCallback(lldb::LogOutputCallback log_callback,
void *baton) {
// For simplicity's sake, I am not going to deal with how to close down any
// open logging streams, I just redirect everything from here on out to the
// callback.
m_log_callback_stream_sp =
std::make_shared<StreamCallback>(log_callback, baton);
}
bool Debugger::EnableLog(llvm::StringRef channel,
llvm::ArrayRef<const char *> categories,
llvm::StringRef log_file, uint32_t log_options,
llvm::raw_ostream &error_stream) {
const bool should_close = true;
const bool unbuffered = true;
std::shared_ptr<llvm::raw_ostream> log_stream_sp;
if (m_log_callback_stream_sp) {
log_stream_sp = m_log_callback_stream_sp;
// For now when using the callback mode you always get thread & timestamp.
log_options |=
LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_THREAD_NAME;
} else if (log_file.empty()) {
log_stream_sp = std::make_shared<llvm::raw_fd_ostream>(
GetOutputFile().GetDescriptor(), !should_close, unbuffered);
} else {
auto pos = m_log_streams.find(log_file);
if (pos != m_log_streams.end())
log_stream_sp = pos->second.lock();
if (!log_stream_sp) {
llvm::sys::fs::OpenFlags flags = llvm::sys::fs::OF_Text;
if (log_options & LLDB_LOG_OPTION_APPEND)
flags |= llvm::sys::fs::OF_Append;
int FD;
if (std::error_code ec = llvm::sys::fs::openFileForWrite(
log_file, FD, llvm::sys::fs::CD_CreateAlways, flags)) {
error_stream << "Unable to open log file: " << ec.message();
return false;
}
log_stream_sp =
std::make_shared<llvm::raw_fd_ostream>(FD, should_close, unbuffered);
m_log_streams[log_file] = log_stream_sp;
}
}
assert(log_stream_sp);
if (log_options == 0)
log_options =
LLDB_LOG_OPTION_PREPEND_THREAD_NAME | LLDB_LOG_OPTION_THREADSAFE;
return Log::EnableLogChannel(log_stream_sp, log_options, channel, categories,
error_stream);
}
ScriptInterpreter *Debugger::GetScriptInterpreter(bool can_create) {
std::lock_guard<std::recursive_mutex> locker(m_script_interpreter_mutex);
if (!m_script_interpreter_sp) {
if (!can_create)
return nullptr;
m_script_interpreter_sp = PluginManager::GetScriptInterpreterForLanguage(
GetScriptLanguage(), *this);
}
return m_script_interpreter_sp.get();
}
SourceManager &Debugger::GetSourceManager() {
if (!m_source_manager_up)
m_source_manager_up = std::make_unique<SourceManager>(shared_from_this());
return *m_source_manager_up;
}
// This function handles events that were broadcast by the process.
void Debugger::HandleBreakpointEvent(const EventSP &event_sp) {
using namespace lldb;
const uint32_t event_type =
Breakpoint::BreakpointEventData::GetBreakpointEventTypeFromEvent(
event_sp);
// if (event_type & eBreakpointEventTypeAdded
// || event_type & eBreakpointEventTypeRemoved
// || event_type & eBreakpointEventTypeEnabled
// || event_type & eBreakpointEventTypeDisabled
// || event_type & eBreakpointEventTypeCommandChanged
// || event_type & eBreakpointEventTypeConditionChanged
// || event_type & eBreakpointEventTypeIgnoreChanged
// || event_type & eBreakpointEventTypeLocationsResolved)
// {
// // Don't do anything about these events, since the breakpoint
// commands already echo these actions.
// }
//
if (event_type & eBreakpointEventTypeLocationsAdded) {
uint32_t num_new_locations =
Breakpoint::BreakpointEventData::GetNumBreakpointLocationsFromEvent(
event_sp);
if (num_new_locations > 0) {
BreakpointSP breakpoint =
Breakpoint::BreakpointEventData::GetBreakpointFromEvent(event_sp);
StreamSP output_sp(GetAsyncOutputStream());
if (output_sp) {
output_sp->Printf("%d location%s added to breakpoint %d\n",
num_new_locations, num_new_locations == 1 ? "" : "s",
breakpoint->GetID());
output_sp->Flush();
}
}
}
// else if (event_type & eBreakpointEventTypeLocationsRemoved)
// {
// // These locations just get disabled, not sure it is worth spamming
// folks about this on the command line.
// }
// else if (event_type & eBreakpointEventTypeLocationsResolved)
// {
// // This might be an interesting thing to note, but I'm going to
// leave it quiet for now, it just looked noisy.
// }
}
void Debugger::FlushProcessOutput(Process &process, bool flush_stdout,
bool flush_stderr) {
const auto &flush = [&](Stream &stream,
size_t (Process::*get)(char *, size_t, Status &)) {
Status error;
size_t len;
char buffer[1024];
while ((len = (process.*get)(buffer, sizeof(buffer), error)) > 0)
stream.Write(buffer, len);
stream.Flush();
};
std::lock_guard<std::mutex> guard(m_output_flush_mutex);
if (flush_stdout)
flush(*GetAsyncOutputStream(), &Process::GetSTDOUT);
if (flush_stderr)
flush(*GetAsyncErrorStream(), &Process::GetSTDERR);
}
// This function handles events that were broadcast by the process.
void Debugger::HandleProcessEvent(const EventSP &event_sp) {
using namespace lldb;
const uint32_t event_type = event_sp->GetType();
ProcessSP process_sp =
(event_type == Process::eBroadcastBitStructuredData)
? EventDataStructuredData::GetProcessFromEvent(event_sp.get())
: Process::ProcessEventData::GetProcessFromEvent(event_sp.get());
StreamSP output_stream_sp = GetAsyncOutputStream();
StreamSP error_stream_sp = GetAsyncErrorStream();
const bool gui_enabled = IsForwardingEvents();
if (!gui_enabled) {
bool pop_process_io_handler = false;
assert(process_sp);
bool state_is_stopped = false;
const bool got_state_changed =
(event_type & Process::eBroadcastBitStateChanged) != 0;
const bool got_stdout = (event_type & Process::eBroadcastBitSTDOUT) != 0;
const bool got_stderr = (event_type & Process::eBroadcastBitSTDERR) != 0;
const bool got_structured_data =
(event_type & Process::eBroadcastBitStructuredData) != 0;
if (got_state_changed) {
StateType event_state =
Process::ProcessEventData::GetStateFromEvent(event_sp.get());
state_is_stopped = StateIsStoppedState(event_state, false);
}
// Display running state changes first before any STDIO
if (got_state_changed && !state_is_stopped) {
Process::HandleProcessStateChangedEvent(event_sp, output_stream_sp.get(),
pop_process_io_handler);
}
// Now display STDOUT and STDERR
FlushProcessOutput(*process_sp, got_stdout || got_state_changed,
got_stderr || got_state_changed);
// Give structured data events an opportunity to display.
if (got_structured_data) {
StructuredDataPluginSP plugin_sp =
EventDataStructuredData::GetPluginFromEvent(event_sp.get());
if (plugin_sp) {
auto structured_data_sp =
EventDataStructuredData::GetObjectFromEvent(event_sp.get());
if (output_stream_sp) {
StreamString content_stream;
Status error =
plugin_sp->GetDescription(structured_data_sp, content_stream);
if (error.Success()) {
if (!content_stream.GetString().empty()) {
// Add newline.
content_stream.PutChar('\n');
content_stream.Flush();
// Print it.
output_stream_sp->PutCString(content_stream.GetString());
}
} else {
error_stream_sp->Printf("Failed to print structured "
"data with plugin %s: %s",
plugin_sp->GetPluginName().AsCString(),
error.AsCString());
}
}
}
}
// Now display any stopped state changes after any STDIO
if (got_state_changed && state_is_stopped) {
Process::HandleProcessStateChangedEvent(event_sp, output_stream_sp.get(),
pop_process_io_handler);
}
output_stream_sp->Flush();
error_stream_sp->Flush();
if (pop_process_io_handler)
process_sp->PopProcessIOHandler();
}
}
void Debugger::HandleThreadEvent(const EventSP &event_sp) {
// At present the only thread event we handle is the Frame Changed event, and
// all we do for that is just reprint the thread status for that thread.
using namespace lldb;
const uint32_t event_type = event_sp->GetType();
const bool stop_format = true;
if (event_type == Thread::eBroadcastBitStackChanged ||
event_type == Thread::eBroadcastBitThreadSelected) {
ThreadSP thread_sp(
Thread::ThreadEventData::GetThreadFromEvent(event_sp.get()));
if (thread_sp) {
thread_sp->GetStatus(*GetAsyncOutputStream(), 0, 1, 1, stop_format);
}
}
}
bool Debugger::IsForwardingEvents() { return (bool)m_forward_listener_sp; }
void Debugger::EnableForwardEvents(const ListenerSP &listener_sp) {
m_forward_listener_sp = listener_sp;
}
void Debugger::CancelForwardEvents(const ListenerSP &listener_sp) {
m_forward_listener_sp.reset();
}
void Debugger::DefaultEventHandler() {
ListenerSP listener_sp(GetListener());
ConstString broadcaster_class_target(Target::GetStaticBroadcasterClass());
ConstString broadcaster_class_process(Process::GetStaticBroadcasterClass());
ConstString broadcaster_class_thread(Thread::GetStaticBroadcasterClass());
BroadcastEventSpec target_event_spec(broadcaster_class_target,
Target::eBroadcastBitBreakpointChanged);
BroadcastEventSpec process_event_spec(
broadcaster_class_process,
Process::eBroadcastBitStateChanged | Process::eBroadcastBitSTDOUT |
Process::eBroadcastBitSTDERR | Process::eBroadcastBitStructuredData);
BroadcastEventSpec thread_event_spec(broadcaster_class_thread,
Thread::eBroadcastBitStackChanged |
Thread::eBroadcastBitThreadSelected);
listener_sp->StartListeningForEventSpec(m_broadcaster_manager_sp,
target_event_spec);
listener_sp->StartListeningForEventSpec(m_broadcaster_manager_sp,
process_event_spec);
listener_sp->StartListeningForEventSpec(m_broadcaster_manager_sp,
thread_event_spec);
listener_sp->StartListeningForEvents(
m_command_interpreter_up.get(),
CommandInterpreter::eBroadcastBitQuitCommandReceived |
CommandInterpreter::eBroadcastBitAsynchronousOutputData |
CommandInterpreter::eBroadcastBitAsynchronousErrorData);
// Let the thread that spawned us know that we have started up and that we
// are now listening to all required events so no events get missed
m_sync_broadcaster.BroadcastEvent(eBroadcastBitEventThreadIsListening);
bool done = false;
while (!done) {
EventSP event_sp;
if (listener_sp->GetEvent(event_sp, llvm::None)) {
if (event_sp) {
Broadcaster *broadcaster = event_sp->GetBroadcaster();
if (broadcaster) {
uint32_t event_type = event_sp->GetType();
ConstString broadcaster_class(broadcaster->GetBroadcasterClass());
if (broadcaster_class == broadcaster_class_process) {
HandleProcessEvent(event_sp);
} else if (broadcaster_class == broadcaster_class_target) {
if (Breakpoint::BreakpointEventData::GetEventDataFromEvent(
event_sp.get())) {
HandleBreakpointEvent(event_sp);
}
} else if (broadcaster_class == broadcaster_class_thread) {
HandleThreadEvent(event_sp);
} else if (broadcaster == m_command_interpreter_up.get()) {
if (event_type &
CommandInterpreter::eBroadcastBitQuitCommandReceived) {
done = true;
} else if (event_type &
CommandInterpreter::eBroadcastBitAsynchronousErrorData) {
const char *data = reinterpret_cast<const char *>(
EventDataBytes::GetBytesFromEvent(event_sp.get()));
if (data && data[0]) {
StreamSP error_sp(GetAsyncErrorStream());
if (error_sp) {
error_sp->PutCString(data);
error_sp->Flush();
}
}
} else if (event_type & CommandInterpreter::
eBroadcastBitAsynchronousOutputData) {
const char *data = reinterpret_cast<const char *>(
EventDataBytes::GetBytesFromEvent(event_sp.get()));
if (data && data[0]) {
StreamSP output_sp(GetAsyncOutputStream());
if (output_sp) {
output_sp->PutCString(data);
output_sp->Flush();
}
}
}
}
}
if (m_forward_listener_sp)
m_forward_listener_sp->AddEvent(event_sp);
}
}
}
}
lldb::thread_result_t Debugger::EventHandlerThread(lldb::thread_arg_t arg) {
((Debugger *)arg)->DefaultEventHandler();
return {};
}
bool Debugger::StartEventHandlerThread() {
if (!m_event_handler_thread.IsJoinable()) {
// We must synchronize with the DefaultEventHandler() thread to ensure it
// is up and running and listening to events before we return from this
// function. We do this by listening to events for the
// eBroadcastBitEventThreadIsListening from the m_sync_broadcaster
ConstString full_name("lldb.debugger.event-handler");
ListenerSP listener_sp(Listener::MakeListener(full_name.AsCString()));
listener_sp->StartListeningForEvents(&m_sync_broadcaster,
eBroadcastBitEventThreadIsListening);
auto thread_name =
full_name.GetLength() < llvm::get_max_thread_name_length()
? full_name.AsCString()
: "dbg.evt-handler";
// Use larger 8MB stack for this thread
llvm::Expected<HostThread> event_handler_thread =
ThreadLauncher::LaunchThread(thread_name, EventHandlerThread, this,
g_debugger_event_thread_stack_bytes);
if (event_handler_thread) {
m_event_handler_thread = *event_handler_thread;
} else {
LLDB_LOG(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST),
"failed to launch host thread: {}",
llvm::toString(event_handler_thread.takeError()));
}
// Make sure DefaultEventHandler() is running and listening to events
// before we return from this function. We are only listening for events of
// type eBroadcastBitEventThreadIsListening so we don't need to check the
// event, we just need to wait an infinite amount of time for it (nullptr
// timeout as the first parameter)
lldb::EventSP event_sp;
listener_sp->GetEvent(event_sp, llvm::None);
}
return m_event_handler_thread.IsJoinable();
}
void Debugger::StopEventHandlerThread() {
if (m_event_handler_thread.IsJoinable()) {
GetCommandInterpreter().BroadcastEvent(
CommandInterpreter::eBroadcastBitQuitCommandReceived);
m_event_handler_thread.Join(nullptr);
}
}
lldb::thread_result_t Debugger::IOHandlerThread(lldb::thread_arg_t arg) {
Debugger *debugger = (Debugger *)arg;
debugger->ExecuteIOHandlers();
debugger->StopEventHandlerThread();
return {};
}
bool Debugger::HasIOHandlerThread() { return m_io_handler_thread.IsJoinable(); }
bool Debugger::StartIOHandlerThread() {
if (!m_io_handler_thread.IsJoinable()) {
llvm::Expected<HostThread> io_handler_thread = ThreadLauncher::LaunchThread(
"lldb.debugger.io-handler", IOHandlerThread, this,
8 * 1024 * 1024); // Use larger 8MB stack for this thread
if (io_handler_thread) {
m_io_handler_thread = *io_handler_thread;
} else {
LLDB_LOG(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST),
"failed to launch host thread: {}",
llvm::toString(io_handler_thread.takeError()));
}
}
return m_io_handler_thread.IsJoinable();
}
void Debugger::StopIOHandlerThread() {
if (m_io_handler_thread.IsJoinable()) {
GetInputFile().Close();
m_io_handler_thread.Join(nullptr);
}
}
void Debugger::JoinIOHandlerThread() {
if (HasIOHandlerThread()) {
thread_result_t result;
m_io_handler_thread.Join(&result);
m_io_handler_thread = LLDB_INVALID_HOST_THREAD;
}
}
Target *Debugger::GetSelectedOrDummyTarget(bool prefer_dummy) {
Target *target = nullptr;
if (!prefer_dummy) {
target = m_target_list.GetSelectedTarget().get();
if (target)
return target;
}
return GetDummyTarget();
}
Status Debugger::RunREPL(LanguageType language, const char *repl_options) {
Status err;
FileSpec repl_executable;
if (language == eLanguageTypeUnknown) {
LanguageSet repl_languages = Language::GetLanguagesSupportingREPLs();
if (auto single_lang = repl_languages.GetSingularLanguage()) {
language = *single_lang;
} else if (repl_languages.Empty()) {
err.SetErrorStringWithFormat(
"LLDB isn't configured with REPL support for any languages.");
return err;
} else {
err.SetErrorStringWithFormat(
"Multiple possible REPL languages. Please specify a language.");
return err;
}
}
Target *const target =
nullptr; // passing in an empty target means the REPL must create one
REPLSP repl_sp(REPL::Create(err, language, this, target, repl_options));
if (!err.Success()) {
return err;
}
if (!repl_sp) {
err.SetErrorStringWithFormat("couldn't find a REPL for %s",
Language::GetNameForLanguageType(language));
return err;
}
repl_sp->SetCompilerOptions(repl_options);
repl_sp->RunLoop();
return err;
}
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