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llvm-capstone/lldb/source/Interpreter/CommandInterpreter.cpp
Jonas Devlieghere 76c6feafac [CommandInterpreter] Simplify PreprocessCommand. (NFCI) 
Simplify some code in PreprocessCommand. This change improves
consistency, reduces the indentation and makes the code easier to follow
overall.

llvm-svn: 350166
2018-12-30 17:56:30 +00:00

3178 lines
117 KiB
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//===-- CommandInterpreter.cpp ----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <stdlib.h>
#include <string>
#include <vector>
#include "CommandObjectScript.h"
#include "lldb/Interpreter/CommandObjectRegexCommand.h"
#include "Commands/CommandObjectApropos.h"
#include "Commands/CommandObjectBreakpoint.h"
#include "Commands/CommandObjectBugreport.h"
#include "Commands/CommandObjectCommands.h"
#include "Commands/CommandObjectDisassemble.h"
#include "Commands/CommandObjectExpression.h"
#include "Commands/CommandObjectFrame.h"
#include "Commands/CommandObjectGUI.h"
#include "Commands/CommandObjectHelp.h"
#include "Commands/CommandObjectLanguage.h"
#include "Commands/CommandObjectLog.h"
#include "Commands/CommandObjectMemory.h"
#include "Commands/CommandObjectPlatform.h"
#include "Commands/CommandObjectPlugin.h"
#include "Commands/CommandObjectProcess.h"
#include "Commands/CommandObjectQuit.h"
#include "Commands/CommandObjectRegister.h"
#include "Commands/CommandObjectReproducer.h"
#include "Commands/CommandObjectSettings.h"
#include "Commands/CommandObjectSource.h"
#include "Commands/CommandObjectStats.h"
#include "Commands/CommandObjectTarget.h"
#include "Commands/CommandObjectThread.h"
#include "Commands/CommandObjectType.h"
#include "Commands/CommandObjectVersion.h"
#include "Commands/CommandObjectWatchpoint.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/State.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/Timer.h"
#ifndef LLDB_DISABLE_LIBEDIT
#include "lldb/Host/Editline.h"
#endif
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Interpreter/CommandCompletions.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Interpreter/OptionValueProperties.h"
#include "lldb/Interpreter/Options.h"
#include "lldb/Interpreter/Property.h"
#include "lldb/Utility/Args.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/TargetList.h"
#include "lldb/Target/Thread.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/PrettyStackTrace.h"
using namespace lldb;
using namespace lldb_private;
static const char *k_white_space = " \t\v";
static constexpr bool NoGlobalSetting = true;
static constexpr uintptr_t DefaultValueTrue = true;
static constexpr uintptr_t DefaultValueFalse = false;
static constexpr const char *NoCStrDefault = nullptr;
static constexpr PropertyDefinition g_properties[] = {
{"expand-regex-aliases", OptionValue::eTypeBoolean, NoGlobalSetting,
DefaultValueFalse, NoCStrDefault, {},
"If true, regular expression alias commands will show the "
"expanded command that will be executed. This can be used to "
"debug new regular expression alias commands."},
{"prompt-on-quit", OptionValue::eTypeBoolean, NoGlobalSetting,
DefaultValueTrue, NoCStrDefault, {},
"If true, LLDB will prompt you before quitting if there are any live "
"processes being debugged. If false, LLDB will quit without asking in any "
"case."},
{"stop-command-source-on-error", OptionValue::eTypeBoolean, NoGlobalSetting,
DefaultValueTrue, NoCStrDefault, {},
"If true, LLDB will stop running a 'command source' "
"script upon encountering an error."},
{"space-repl-prompts", OptionValue::eTypeBoolean, NoGlobalSetting,
DefaultValueFalse, NoCStrDefault, {},
"If true, blank lines will be printed between between REPL submissions."},
{"echo-commands", OptionValue::eTypeBoolean, NoGlobalSetting,
DefaultValueTrue, NoCStrDefault, {},
"If true, commands will be echoed before they are evaluated."},
{"echo-comment-commands", OptionValue::eTypeBoolean, NoGlobalSetting,
DefaultValueTrue, NoCStrDefault, {},
"If true, commands will be echoed even if they are pure comment lines."}};
enum {
ePropertyExpandRegexAliases = 0,
ePropertyPromptOnQuit = 1,
ePropertyStopCmdSourceOnError = 2,
eSpaceReplPrompts = 3,
eEchoCommands = 4,
eEchoCommentCommands = 5
};
ConstString &CommandInterpreter::GetStaticBroadcasterClass() {
static ConstString class_name("lldb.commandInterpreter");
return class_name;
}
CommandInterpreter::CommandInterpreter(Debugger &debugger,
ScriptLanguage script_language,
bool synchronous_execution)
: Broadcaster(debugger.GetBroadcasterManager(),
CommandInterpreter::GetStaticBroadcasterClass().AsCString()),
Properties(OptionValuePropertiesSP(
new OptionValueProperties(ConstString("interpreter")))),
IOHandlerDelegate(IOHandlerDelegate::Completion::LLDBCommand),
m_debugger(debugger), m_synchronous_execution(synchronous_execution),
m_skip_lldbinit_files(false), m_skip_app_init_files(false),
m_script_interpreter_sp(), m_command_io_handler_sp(), m_comment_char('#'),
m_batch_command_mode(false), m_truncation_warning(eNoTruncation),
m_command_source_depth(0), m_num_errors(0), m_quit_requested(false),
m_stopped_for_crash(false) {
debugger.SetScriptLanguage(script_language);
SetEventName(eBroadcastBitThreadShouldExit, "thread-should-exit");
SetEventName(eBroadcastBitResetPrompt, "reset-prompt");
SetEventName(eBroadcastBitQuitCommandReceived, "quit");
CheckInWithManager();
m_collection_sp->Initialize(g_properties);
}
bool CommandInterpreter::GetExpandRegexAliases() const {
const uint32_t idx = ePropertyExpandRegexAliases;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_properties[idx].default_uint_value != 0);
}
bool CommandInterpreter::GetPromptOnQuit() const {
const uint32_t idx = ePropertyPromptOnQuit;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_properties[idx].default_uint_value != 0);
}
void CommandInterpreter::SetPromptOnQuit(bool b) {
const uint32_t idx = ePropertyPromptOnQuit;
m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}
bool CommandInterpreter::GetEchoCommands() const {
const uint32_t idx = eEchoCommands;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_properties[idx].default_uint_value != 0);
}
void CommandInterpreter::SetEchoCommands(bool b) {
const uint32_t idx = eEchoCommands;
m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}
bool CommandInterpreter::GetEchoCommentCommands() const {
const uint32_t idx = eEchoCommentCommands;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_properties[idx].default_uint_value != 0);
}
void CommandInterpreter::SetEchoCommentCommands(bool b) {
const uint32_t idx = eEchoCommentCommands;
m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}
void CommandInterpreter::AllowExitCodeOnQuit(bool allow) {
m_allow_exit_code = allow;
if (!allow)
m_quit_exit_code.reset();
}
bool CommandInterpreter::SetQuitExitCode(int exit_code) {
if (!m_allow_exit_code)
return false;
m_quit_exit_code = exit_code;
return true;
}
int CommandInterpreter::GetQuitExitCode(bool &exited) const {
exited = m_quit_exit_code.hasValue();
if (exited)
return *m_quit_exit_code;
return 0;
}
void CommandInterpreter::ResolveCommand(const char *command_line,
CommandReturnObject &result) {
std::string command = command_line;
if (ResolveCommandImpl(command, result) != nullptr) {
result.AppendMessageWithFormat("%s", command.c_str());
result.SetStatus(eReturnStatusSuccessFinishResult);
}
}
bool CommandInterpreter::GetStopCmdSourceOnError() const {
const uint32_t idx = ePropertyStopCmdSourceOnError;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_properties[idx].default_uint_value != 0);
}
bool CommandInterpreter::GetSpaceReplPrompts() const {
const uint32_t idx = eSpaceReplPrompts;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_properties[idx].default_uint_value != 0);
}
void CommandInterpreter::Initialize() {
static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
CommandReturnObject result;
LoadCommandDictionary();
// An alias arguments vector to reuse - reset it before use...
OptionArgVectorSP alias_arguments_vector_sp(new OptionArgVector);
// Set up some initial aliases.
CommandObjectSP cmd_obj_sp = GetCommandSPExact("quit", false);
if (cmd_obj_sp) {
AddAlias("q", cmd_obj_sp);
AddAlias("exit", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("_regexp-attach", false);
if (cmd_obj_sp)
AddAlias("attach", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("process detach", false);
if (cmd_obj_sp) {
AddAlias("detach", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("process continue", false);
if (cmd_obj_sp) {
AddAlias("c", cmd_obj_sp);
AddAlias("continue", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("_regexp-break", false);
if (cmd_obj_sp)
AddAlias("b", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("_regexp-tbreak", false);
if (cmd_obj_sp)
AddAlias("tbreak", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("thread step-inst", false);
if (cmd_obj_sp) {
AddAlias("stepi", cmd_obj_sp);
AddAlias("si", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("thread step-inst-over", false);
if (cmd_obj_sp) {
AddAlias("nexti", cmd_obj_sp);
AddAlias("ni", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("thread step-in", false);
if (cmd_obj_sp) {
AddAlias("s", cmd_obj_sp);
AddAlias("step", cmd_obj_sp);
CommandAlias *sif_alias = AddAlias(
"sif", cmd_obj_sp, "--end-linenumber block --step-in-target %1");
if (sif_alias) {
sif_alias->SetHelp("Step through the current block, stopping if you step "
"directly into a function whose name matches the "
"TargetFunctionName.");
sif_alias->SetSyntax("sif <TargetFunctionName>");
}
}
cmd_obj_sp = GetCommandSPExact("thread step-over", false);
if (cmd_obj_sp) {
AddAlias("n", cmd_obj_sp);
AddAlias("next", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("thread step-out", false);
if (cmd_obj_sp) {
AddAlias("finish", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("frame select", false);
if (cmd_obj_sp) {
AddAlias("f", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("thread select", false);
if (cmd_obj_sp) {
AddAlias("t", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("_regexp-jump", false);
if (cmd_obj_sp) {
AddAlias("j", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
AddAlias("jump", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
}
cmd_obj_sp = GetCommandSPExact("_regexp-list", false);
if (cmd_obj_sp) {
AddAlias("l", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
AddAlias("list", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
}
cmd_obj_sp = GetCommandSPExact("_regexp-env", false);
if (cmd_obj_sp)
AddAlias("env", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("memory read", false);
if (cmd_obj_sp)
AddAlias("x", cmd_obj_sp);
cmd_obj_sp = GetCommandSPExact("_regexp-up", false);
if (cmd_obj_sp)
AddAlias("up", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("_regexp-down", false);
if (cmd_obj_sp)
AddAlias("down", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("_regexp-display", false);
if (cmd_obj_sp)
AddAlias("display", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("disassemble", false);
if (cmd_obj_sp)
AddAlias("dis", cmd_obj_sp);
cmd_obj_sp = GetCommandSPExact("disassemble", false);
if (cmd_obj_sp)
AddAlias("di", cmd_obj_sp);
cmd_obj_sp = GetCommandSPExact("_regexp-undisplay", false);
if (cmd_obj_sp)
AddAlias("undisplay", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("_regexp-bt", false);
if (cmd_obj_sp)
AddAlias("bt", cmd_obj_sp)->SetSyntax(cmd_obj_sp->GetSyntax());
cmd_obj_sp = GetCommandSPExact("target create", false);
if (cmd_obj_sp)
AddAlias("file", cmd_obj_sp);
cmd_obj_sp = GetCommandSPExact("target modules", false);
if (cmd_obj_sp)
AddAlias("image", cmd_obj_sp);
alias_arguments_vector_sp.reset(new OptionArgVector);
cmd_obj_sp = GetCommandSPExact("expression", false);
if (cmd_obj_sp) {
AddAlias("p", cmd_obj_sp, "--")->SetHelpLong("");
AddAlias("print", cmd_obj_sp, "--")->SetHelpLong("");
AddAlias("call", cmd_obj_sp, "--")->SetHelpLong("");
if (auto po = AddAlias("po", cmd_obj_sp, "-O --")) {
po->SetHelp("Evaluate an expression on the current thread. Displays any "
"returned value with formatting "
"controlled by the type's author.");
po->SetHelpLong("");
}
AddAlias("parray", cmd_obj_sp, "--element-count %1 --")->SetHelpLong("");
AddAlias("poarray", cmd_obj_sp,
"--object-description --element-count %1 --")
->SetHelpLong("");
}
cmd_obj_sp = GetCommandSPExact("process kill", false);
if (cmd_obj_sp) {
AddAlias("kill", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("process launch", false);
if (cmd_obj_sp) {
alias_arguments_vector_sp.reset(new OptionArgVector);
#if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
AddAlias("r", cmd_obj_sp, "--");
AddAlias("run", cmd_obj_sp, "--");
#else
#if defined(__APPLE__)
std::string shell_option;
shell_option.append("--shell-expand-args");
shell_option.append(" true");
shell_option.append(" --");
AddAlias("r", cmd_obj_sp, "--shell-expand-args true --");
AddAlias("run", cmd_obj_sp, "--shell-expand-args true --");
#else
StreamString defaultshell;
defaultshell.Printf("--shell=%s --",
HostInfo::GetDefaultShell().GetPath().c_str());
AddAlias("r", cmd_obj_sp, defaultshell.GetString());
AddAlias("run", cmd_obj_sp, defaultshell.GetString());
#endif
#endif
}
cmd_obj_sp = GetCommandSPExact("target symbols add", false);
if (cmd_obj_sp) {
AddAlias("add-dsym", cmd_obj_sp);
}
cmd_obj_sp = GetCommandSPExact("breakpoint set", false);
if (cmd_obj_sp) {
AddAlias("rbreak", cmd_obj_sp, "--func-regex %1");
}
cmd_obj_sp = GetCommandSPExact("frame variable", false);
if (cmd_obj_sp) {
AddAlias("v", cmd_obj_sp);
AddAlias("var", cmd_obj_sp);
AddAlias("vo", cmd_obj_sp, "--object-description");
}
}
void CommandInterpreter::Clear() {
m_command_io_handler_sp.reset();
if (m_script_interpreter_sp)
m_script_interpreter_sp->Clear();
}
const char *CommandInterpreter::ProcessEmbeddedScriptCommands(const char *arg) {
// This function has not yet been implemented.
// Look for any embedded script command
// If found,
// get interpreter object from the command dictionary,
// call execute_one_command on it,
// get the results as a string,
// substitute that string for current stuff.
return arg;
}
void CommandInterpreter::LoadCommandDictionary() {
static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
lldb::ScriptLanguage script_language = m_debugger.GetScriptLanguage();
m_command_dict["apropos"] = CommandObjectSP(new CommandObjectApropos(*this));
m_command_dict["breakpoint"] =
CommandObjectSP(new CommandObjectMultiwordBreakpoint(*this));
m_command_dict["bugreport"] =
CommandObjectSP(new CommandObjectMultiwordBugreport(*this));
m_command_dict["command"] =
CommandObjectSP(new CommandObjectMultiwordCommands(*this));
m_command_dict["disassemble"] =
CommandObjectSP(new CommandObjectDisassemble(*this));
m_command_dict["expression"] =
CommandObjectSP(new CommandObjectExpression(*this));
m_command_dict["frame"] =
CommandObjectSP(new CommandObjectMultiwordFrame(*this));
m_command_dict["gui"] = CommandObjectSP(new CommandObjectGUI(*this));
m_command_dict["help"] = CommandObjectSP(new CommandObjectHelp(*this));
m_command_dict["log"] = CommandObjectSP(new CommandObjectLog(*this));
m_command_dict["memory"] = CommandObjectSP(new CommandObjectMemory(*this));
m_command_dict["platform"] =
CommandObjectSP(new CommandObjectPlatform(*this));
m_command_dict["plugin"] = CommandObjectSP(new CommandObjectPlugin(*this));
m_command_dict["process"] =
CommandObjectSP(new CommandObjectMultiwordProcess(*this));
m_command_dict["quit"] = CommandObjectSP(new CommandObjectQuit(*this));
m_command_dict["register"] =
CommandObjectSP(new CommandObjectRegister(*this));
m_command_dict["reproducer"] =
CommandObjectSP(new CommandObjectReproducer(*this));
m_command_dict["script"] =
CommandObjectSP(new CommandObjectScript(*this, script_language));
m_command_dict["settings"] =
CommandObjectSP(new CommandObjectMultiwordSettings(*this));
m_command_dict["source"] =
CommandObjectSP(new CommandObjectMultiwordSource(*this));
m_command_dict["statistics"] = CommandObjectSP(new CommandObjectStats(*this));
m_command_dict["target"] =
CommandObjectSP(new CommandObjectMultiwordTarget(*this));
m_command_dict["thread"] =
CommandObjectSP(new CommandObjectMultiwordThread(*this));
m_command_dict["type"] = CommandObjectSP(new CommandObjectType(*this));
m_command_dict["version"] = CommandObjectSP(new CommandObjectVersion(*this));
m_command_dict["watchpoint"] =
CommandObjectSP(new CommandObjectMultiwordWatchpoint(*this));
m_command_dict["language"] =
CommandObjectSP(new CommandObjectLanguage(*this));
const char *break_regexes[][2] = {
{"^(.*[^[:space:]])[[:space:]]*:[[:space:]]*([[:digit:]]+)[[:space:]]*$",
"breakpoint set --file '%1' --line %2"},
{"^/([^/]+)/$", "breakpoint set --source-pattern-regexp '%1'"},
{"^([[:digit:]]+)[[:space:]]*$", "breakpoint set --line %1"},
{"^\\*?(0x[[:xdigit:]]+)[[:space:]]*$", "breakpoint set --address %1"},
{"^[\"']?([-+]?\\[.*\\])[\"']?[[:space:]]*$",
"breakpoint set --name '%1'"},
{"^(-.*)$", "breakpoint set %1"},
{"^(.*[^[:space:]])`(.*[^[:space:]])[[:space:]]*$",
"breakpoint set --name '%2' --shlib '%1'"},
{"^\\&(.*[^[:space:]])[[:space:]]*$",
"breakpoint set --name '%1' --skip-prologue=0"},
{"^[\"']?(.*[^[:space:]\"'])[\"']?[[:space:]]*$",
"breakpoint set --name '%1'"}};
size_t num_regexes = llvm::array_lengthof(break_regexes);
std::unique_ptr<CommandObjectRegexCommand> break_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-break",
"Set a breakpoint using one of several shorthand formats.",
"\n"
"_regexp-break <filename>:<linenum>\n"
" main.c:12 // Break at line 12 of "
"main.c\n\n"
"_regexp-break <linenum>\n"
" 12 // Break at line 12 of current "
"file\n\n"
"_regexp-break 0x<address>\n"
" 0x1234000 // Break at address "
"0x1234000\n\n"
"_regexp-break <name>\n"
" main // Break in 'main' after the "
"prologue\n\n"
"_regexp-break &<name>\n"
" &main // Break at first instruction "
"in 'main'\n\n"
"_regexp-break <module>`<name>\n"
" libc.so`malloc // Break in 'malloc' from "
"'libc.so'\n\n"
"_regexp-break /<source-regex>/\n"
" /break here/ // Break on source lines in "
"current file\n"
" // containing text 'break "
"here'.\n",
2, CommandCompletions::eSymbolCompletion |
CommandCompletions::eSourceFileCompletion,
false));
if (break_regex_cmd_ap.get()) {
bool success = true;
for (size_t i = 0; i < num_regexes; i++) {
success = break_regex_cmd_ap->AddRegexCommand(break_regexes[i][0],
break_regexes[i][1]);
if (!success)
break;
}
success =
break_regex_cmd_ap->AddRegexCommand("^$", "breakpoint list --full");
if (success) {
CommandObjectSP break_regex_cmd_sp(break_regex_cmd_ap.release());
m_command_dict[break_regex_cmd_sp->GetCommandName()] = break_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> tbreak_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-tbreak",
"Set a one-shot breakpoint using one of several shorthand formats.",
"\n"
"_regexp-break <filename>:<linenum>\n"
" main.c:12 // Break at line 12 of "
"main.c\n\n"
"_regexp-break <linenum>\n"
" 12 // Break at line 12 of current "
"file\n\n"
"_regexp-break 0x<address>\n"
" 0x1234000 // Break at address "
"0x1234000\n\n"
"_regexp-break <name>\n"
" main // Break in 'main' after the "
"prologue\n\n"
"_regexp-break &<name>\n"
" &main // Break at first instruction "
"in 'main'\n\n"
"_regexp-break <module>`<name>\n"
" libc.so`malloc // Break in 'malloc' from "
"'libc.so'\n\n"
"_regexp-break /<source-regex>/\n"
" /break here/ // Break on source lines in "
"current file\n"
" // containing text 'break "
"here'.\n",
2, CommandCompletions::eSymbolCompletion |
CommandCompletions::eSourceFileCompletion,
false));
if (tbreak_regex_cmd_ap.get()) {
bool success = true;
for (size_t i = 0; i < num_regexes; i++) {
// If you add a resultant command string longer than 1024 characters be
// sure to increase the size of this buffer.
char buffer[1024];
int num_printed =
snprintf(buffer, 1024, "%s %s", break_regexes[i][1], "-o 1");
lldbassert(num_printed < 1024);
UNUSED_IF_ASSERT_DISABLED(num_printed);
success =
tbreak_regex_cmd_ap->AddRegexCommand(break_regexes[i][0], buffer);
if (!success)
break;
}
success =
tbreak_regex_cmd_ap->AddRegexCommand("^$", "breakpoint list --full");
if (success) {
CommandObjectSP tbreak_regex_cmd_sp(tbreak_regex_cmd_ap.release());
m_command_dict[tbreak_regex_cmd_sp->GetCommandName()] =
tbreak_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> attach_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-attach", "Attach to process by ID or name.",
"_regexp-attach <pid> | <process-name>", 2, 0, false));
if (attach_regex_cmd_ap.get()) {
if (attach_regex_cmd_ap->AddRegexCommand("^([0-9]+)[[:space:]]*$",
"process attach --pid %1") &&
attach_regex_cmd_ap->AddRegexCommand(
"^(-.*|.* -.*)$", "process attach %1") && // Any options that are
// specified get passed to
// 'process attach'
attach_regex_cmd_ap->AddRegexCommand("^(.+)$",
"process attach --name '%1'") &&
attach_regex_cmd_ap->AddRegexCommand("^$", "process attach")) {
CommandObjectSP attach_regex_cmd_sp(attach_regex_cmd_ap.release());
m_command_dict[attach_regex_cmd_sp->GetCommandName()] =
attach_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> down_regex_cmd_ap(
new CommandObjectRegexCommand(*this, "_regexp-down",
"Select a newer stack frame. Defaults to "
"moving one frame, a numeric argument can "
"specify an arbitrary number.",
"_regexp-down [<count>]", 2, 0, false));
if (down_regex_cmd_ap.get()) {
if (down_regex_cmd_ap->AddRegexCommand("^$", "frame select -r -1") &&
down_regex_cmd_ap->AddRegexCommand("^([0-9]+)$",
"frame select -r -%1")) {
CommandObjectSP down_regex_cmd_sp(down_regex_cmd_ap.release());
m_command_dict[down_regex_cmd_sp->GetCommandName()] = down_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> up_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-up",
"Select an older stack frame. Defaults to moving one "
"frame, a numeric argument can specify an arbitrary number.",
"_regexp-up [<count>]", 2, 0, false));
if (up_regex_cmd_ap.get()) {
if (up_regex_cmd_ap->AddRegexCommand("^$", "frame select -r 1") &&
up_regex_cmd_ap->AddRegexCommand("^([0-9]+)$", "frame select -r %1")) {
CommandObjectSP up_regex_cmd_sp(up_regex_cmd_ap.release());
m_command_dict[up_regex_cmd_sp->GetCommandName()] = up_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> display_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-display",
"Evaluate an expression at every stop (see 'help target stop-hook'.)",
"_regexp-display expression", 2, 0, false));
if (display_regex_cmd_ap.get()) {
if (display_regex_cmd_ap->AddRegexCommand(
"^(.+)$", "target stop-hook add -o \"expr -- %1\"")) {
CommandObjectSP display_regex_cmd_sp(display_regex_cmd_ap.release());
m_command_dict[display_regex_cmd_sp->GetCommandName()] =
display_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> undisplay_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-undisplay", "Stop displaying expression at every "
"stop (specified by stop-hook index.)",
"_regexp-undisplay stop-hook-number", 2, 0, false));
if (undisplay_regex_cmd_ap.get()) {
if (undisplay_regex_cmd_ap->AddRegexCommand("^([0-9]+)$",
"target stop-hook delete %1")) {
CommandObjectSP undisplay_regex_cmd_sp(undisplay_regex_cmd_ap.release());
m_command_dict[undisplay_regex_cmd_sp->GetCommandName()] =
undisplay_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> connect_gdb_remote_cmd_ap(
new CommandObjectRegexCommand(
*this, "gdb-remote", "Connect to a process via remote GDB server. "
"If no host is specifed, localhost is assumed.",
"gdb-remote [<hostname>:]<portnum>", 2, 0, false));
if (connect_gdb_remote_cmd_ap.get()) {
if (connect_gdb_remote_cmd_ap->AddRegexCommand(
"^([^:]+|\\[[0-9a-fA-F:]+.*\\]):([0-9]+)$",
"process connect --plugin gdb-remote connect://%1:%2") &&
connect_gdb_remote_cmd_ap->AddRegexCommand(
"^([[:digit:]]+)$",
"process connect --plugin gdb-remote connect://localhost:%1")) {
CommandObjectSP command_sp(connect_gdb_remote_cmd_ap.release());
m_command_dict[command_sp->GetCommandName()] = command_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> connect_kdp_remote_cmd_ap(
new CommandObjectRegexCommand(
*this, "kdp-remote", "Connect to a process via remote KDP server. "
"If no UDP port is specified, port 41139 is "
"assumed.",
"kdp-remote <hostname>[:<portnum>]", 2, 0, false));
if (connect_kdp_remote_cmd_ap.get()) {
if (connect_kdp_remote_cmd_ap->AddRegexCommand(
"^([^:]+:[[:digit:]]+)$",
"process connect --plugin kdp-remote udp://%1") &&
connect_kdp_remote_cmd_ap->AddRegexCommand(
"^(.+)$", "process connect --plugin kdp-remote udp://%1:41139")) {
CommandObjectSP command_sp(connect_kdp_remote_cmd_ap.release());
m_command_dict[command_sp->GetCommandName()] = command_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> bt_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-bt",
"Show the current thread's call stack. Any numeric argument "
"displays at most that many "
"frames. The argument 'all' displays all threads.",
"bt [<digit> | all]", 2, 0, false));
if (bt_regex_cmd_ap.get()) {
// accept but don't document "bt -c <number>" -- before bt was a regex
// command if you wanted to backtrace three frames you would do "bt -c 3"
// but the intention is to have this emulate the gdb "bt" command and so
// now "bt 3" is the preferred form, in line with gdb.
if (bt_regex_cmd_ap->AddRegexCommand("^([[:digit:]]+)$",
"thread backtrace -c %1") &&
bt_regex_cmd_ap->AddRegexCommand("^-c ([[:digit:]]+)$",
"thread backtrace -c %1") &&
bt_regex_cmd_ap->AddRegexCommand("^all$", "thread backtrace all") &&
bt_regex_cmd_ap->AddRegexCommand("^$", "thread backtrace")) {
CommandObjectSP command_sp(bt_regex_cmd_ap.release());
m_command_dict[command_sp->GetCommandName()] = command_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> list_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-list",
"List relevant source code using one of several shorthand formats.",
"\n"
"_regexp-list <file>:<line> // List around specific file/line\n"
"_regexp-list <line> // List current file around specified "
"line\n"
"_regexp-list <function-name> // List specified function\n"
"_regexp-list 0x<address> // List around specified address\n"
"_regexp-list -[<count>] // List previous <count> lines\n"
"_regexp-list // List subsequent lines",
2, CommandCompletions::eSourceFileCompletion, false));
if (list_regex_cmd_ap.get()) {
if (list_regex_cmd_ap->AddRegexCommand("^([0-9]+)[[:space:]]*$",
"source list --line %1") &&
list_regex_cmd_ap->AddRegexCommand(
"^(.*[^[:space:]])[[:space:]]*:[[:space:]]*([[:digit:]]+)[[:space:]"
"]*$",
"source list --file '%1' --line %2") &&
list_regex_cmd_ap->AddRegexCommand(
"^\\*?(0x[[:xdigit:]]+)[[:space:]]*$",
"source list --address %1") &&
list_regex_cmd_ap->AddRegexCommand("^-[[:space:]]*$",
"source list --reverse") &&
list_regex_cmd_ap->AddRegexCommand(
"^-([[:digit:]]+)[[:space:]]*$",
"source list --reverse --count %1") &&
list_regex_cmd_ap->AddRegexCommand("^(.+)$",
"source list --name \"%1\"") &&
list_regex_cmd_ap->AddRegexCommand("^$", "source list")) {
CommandObjectSP list_regex_cmd_sp(list_regex_cmd_ap.release());
m_command_dict[list_regex_cmd_sp->GetCommandName()] = list_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> env_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-env",
"Shorthand for viewing and setting environment variables.",
"\n"
"_regexp-env // Show enrivonment\n"
"_regexp-env <name>=<value> // Set an environment variable",
2, 0, false));
if (env_regex_cmd_ap.get()) {
if (env_regex_cmd_ap->AddRegexCommand("^$",
"settings show target.env-vars") &&
env_regex_cmd_ap->AddRegexCommand("^([A-Za-z_][A-Za-z_0-9]*=.*)$",
"settings set target.env-vars %1")) {
CommandObjectSP env_regex_cmd_sp(env_regex_cmd_ap.release());
m_command_dict[env_regex_cmd_sp->GetCommandName()] = env_regex_cmd_sp;
}
}
std::unique_ptr<CommandObjectRegexCommand> jump_regex_cmd_ap(
new CommandObjectRegexCommand(
*this, "_regexp-jump", "Set the program counter to a new address.",
"\n"
"_regexp-jump <line>\n"
"_regexp-jump +<line-offset> | -<line-offset>\n"
"_regexp-jump <file>:<line>\n"
"_regexp-jump *<addr>\n",
2, 0, false));
if (jump_regex_cmd_ap.get()) {
if (jump_regex_cmd_ap->AddRegexCommand("^\\*(.*)$",
"thread jump --addr %1") &&
jump_regex_cmd_ap->AddRegexCommand("^([0-9]+)$",
"thread jump --line %1") &&
jump_regex_cmd_ap->AddRegexCommand("^([^:]+):([0-9]+)$",
"thread jump --file %1 --line %2") &&
jump_regex_cmd_ap->AddRegexCommand("^([+\\-][0-9]+)$",
"thread jump --by %1")) {
CommandObjectSP jump_regex_cmd_sp(jump_regex_cmd_ap.release());
m_command_dict[jump_regex_cmd_sp->GetCommandName()] = jump_regex_cmd_sp;
}
}
}
int CommandInterpreter::GetCommandNamesMatchingPartialString(
const char *cmd_str, bool include_aliases, StringList &matches,
StringList &descriptions) {
AddNamesMatchingPartialString(m_command_dict, cmd_str, matches,
&descriptions);
if (include_aliases) {
AddNamesMatchingPartialString(m_alias_dict, cmd_str, matches,
&descriptions);
}
return matches.GetSize();
}
CommandObjectSP
CommandInterpreter::GetCommandSP(llvm::StringRef cmd_str, bool include_aliases,
bool exact, StringList *matches,
StringList *descriptions) const {
CommandObjectSP command_sp;
std::string cmd = cmd_str;
if (HasCommands()) {
auto pos = m_command_dict.find(cmd);
if (pos != m_command_dict.end())
command_sp = pos->second;
}
if (include_aliases && HasAliases()) {
auto alias_pos = m_alias_dict.find(cmd);
if (alias_pos != m_alias_dict.end())
command_sp = alias_pos->second;
}
if (HasUserCommands()) {
auto pos = m_user_dict.find(cmd);
if (pos != m_user_dict.end())
command_sp = pos->second;
}
if (!exact && !command_sp) {
// We will only get into here if we didn't find any exact matches.
CommandObjectSP user_match_sp, alias_match_sp, real_match_sp;
StringList local_matches;
if (matches == nullptr)
matches = &local_matches;
unsigned int num_cmd_matches = 0;
unsigned int num_alias_matches = 0;
unsigned int num_user_matches = 0;
// Look through the command dictionaries one by one, and if we get only one
// match from any of them in toto, then return that, otherwise return an
// empty CommandObjectSP and the list of matches.
if (HasCommands()) {
num_cmd_matches = AddNamesMatchingPartialString(m_command_dict, cmd_str,
*matches, descriptions);
}
if (num_cmd_matches == 1) {
cmd.assign(matches->GetStringAtIndex(0));
auto pos = m_command_dict.find(cmd);
if (pos != m_command_dict.end())
real_match_sp = pos->second;
}
if (include_aliases && HasAliases()) {
num_alias_matches = AddNamesMatchingPartialString(m_alias_dict, cmd_str,
*matches, descriptions);
}
if (num_alias_matches == 1) {
cmd.assign(matches->GetStringAtIndex(num_cmd_matches));
auto alias_pos = m_alias_dict.find(cmd);
if (alias_pos != m_alias_dict.end())
alias_match_sp = alias_pos->second;
}
if (HasUserCommands()) {
num_user_matches = AddNamesMatchingPartialString(m_user_dict, cmd_str,
*matches, descriptions);
}
if (num_user_matches == 1) {
cmd.assign(
matches->GetStringAtIndex(num_cmd_matches + num_alias_matches));
auto pos = m_user_dict.find(cmd);
if (pos != m_user_dict.end())
user_match_sp = pos->second;
}
// If we got exactly one match, return that, otherwise return the match
// list.
if (num_user_matches + num_cmd_matches + num_alias_matches == 1) {
if (num_cmd_matches)
return real_match_sp;
else if (num_alias_matches)
return alias_match_sp;
else
return user_match_sp;
}
} else if (matches && command_sp) {
matches->AppendString(cmd_str);
if (descriptions)
descriptions->AppendString(command_sp->GetHelp());
}
return command_sp;
}
bool CommandInterpreter::AddCommand(llvm::StringRef name,
const lldb::CommandObjectSP &cmd_sp,
bool can_replace) {
if (cmd_sp.get())
lldbassert((this == &cmd_sp->GetCommandInterpreter()) &&
"tried to add a CommandObject from a different interpreter");
if (name.empty())
return false;
std::string name_sstr(name);
auto name_iter = m_command_dict.find(name_sstr);
if (name_iter != m_command_dict.end()) {
if (!can_replace || !name_iter->second->IsRemovable())
return false;
name_iter->second = cmd_sp;
} else {
m_command_dict[name_sstr] = cmd_sp;
}
return true;
}
bool CommandInterpreter::AddUserCommand(llvm::StringRef name,
const lldb::CommandObjectSP &cmd_sp,
bool can_replace) {
if (cmd_sp.get())
lldbassert((this == &cmd_sp->GetCommandInterpreter()) &&
"tried to add a CommandObject from a different interpreter");
if (!name.empty()) {
// do not allow replacement of internal commands
if (CommandExists(name)) {
if (!can_replace)
return false;
if (!m_command_dict[name]->IsRemovable())
return false;
}
if (UserCommandExists(name)) {
if (!can_replace)
return false;
if (!m_user_dict[name]->IsRemovable())
return false;
}
m_user_dict[name] = cmd_sp;
return true;
}
return false;
}
CommandObjectSP CommandInterpreter::GetCommandSPExact(llvm::StringRef cmd_str,
bool include_aliases) const {
Args cmd_words(cmd_str); // Break up the command string into words, in case
// it's a multi-word command.
CommandObjectSP ret_val; // Possibly empty return value.
if (cmd_str.empty())
return ret_val;
if (cmd_words.GetArgumentCount() == 1)
return GetCommandSP(cmd_str, include_aliases, true, nullptr);
else {
// We have a multi-word command (seemingly), so we need to do more work.
// First, get the cmd_obj_sp for the first word in the command.
CommandObjectSP cmd_obj_sp = GetCommandSP(llvm::StringRef(cmd_words.GetArgumentAtIndex(0)),
include_aliases, true, nullptr);
if (cmd_obj_sp.get() != nullptr) {
// Loop through the rest of the words in the command (everything passed
// in was supposed to be part of a command name), and find the
// appropriate sub-command SP for each command word....
size_t end = cmd_words.GetArgumentCount();
for (size_t j = 1; j < end; ++j) {
if (cmd_obj_sp->IsMultiwordObject()) {
cmd_obj_sp =
cmd_obj_sp->GetSubcommandSP(cmd_words.GetArgumentAtIndex(j));
if (cmd_obj_sp.get() == nullptr)
// The sub-command name was invalid. Fail and return the empty
// 'ret_val'.
return ret_val;
} else
// We have more words in the command name, but we don't have a
// multiword object. Fail and return empty 'ret_val'.
return ret_val;
}
// We successfully looped through all the command words and got valid
// command objects for them. Assign the last object retrieved to
// 'ret_val'.
ret_val = cmd_obj_sp;
}
}
return ret_val;
}
CommandObject *
CommandInterpreter::GetCommandObject(llvm::StringRef cmd_str,
StringList *matches,
StringList *descriptions) const {
CommandObject *command_obj =
GetCommandSP(cmd_str, false, true, matches, descriptions).get();
// If we didn't find an exact match to the command string in the commands,
// look in the aliases.
if (command_obj)
return command_obj;
command_obj = GetCommandSP(cmd_str, true, true, matches, descriptions).get();
if (command_obj)
return command_obj;
// If there wasn't an exact match then look for an inexact one in just the
// commands
command_obj = GetCommandSP(cmd_str, false, false, nullptr).get();
// Finally, if there wasn't an inexact match among the commands, look for an
// inexact match in both the commands and aliases.
if (command_obj) {
if (matches)
matches->AppendString(command_obj->GetCommandName());
if (descriptions)
descriptions->AppendString(command_obj->GetHelp());
return command_obj;
}
return GetCommandSP(cmd_str, true, false, matches, descriptions).get();
}
bool CommandInterpreter::CommandExists(llvm::StringRef cmd) const {
return m_command_dict.find(cmd) != m_command_dict.end();
}
bool CommandInterpreter::GetAliasFullName(llvm::StringRef cmd,
std::string &full_name) const {
bool exact_match = (m_alias_dict.find(cmd) != m_alias_dict.end());
if (exact_match) {
full_name.assign(cmd);
return exact_match;
} else {
StringList matches;
size_t num_alias_matches;
num_alias_matches =
AddNamesMatchingPartialString(m_alias_dict, cmd, matches);
if (num_alias_matches == 1) {
// Make sure this isn't shadowing a command in the regular command space:
StringList regular_matches;
const bool include_aliases = false;
const bool exact = false;
CommandObjectSP cmd_obj_sp(
GetCommandSP(cmd, include_aliases, exact, &regular_matches));
if (cmd_obj_sp || regular_matches.GetSize() > 0)
return false;
else {
full_name.assign(matches.GetStringAtIndex(0));
return true;
}
} else
return false;
}
}
bool CommandInterpreter::AliasExists(llvm::StringRef cmd) const {
return m_alias_dict.find(cmd) != m_alias_dict.end();
}
bool CommandInterpreter::UserCommandExists(llvm::StringRef cmd) const {
return m_user_dict.find(cmd) != m_user_dict.end();
}
CommandAlias *
CommandInterpreter::AddAlias(llvm::StringRef alias_name,
lldb::CommandObjectSP &command_obj_sp,
llvm::StringRef args_string) {
if (command_obj_sp.get())
lldbassert((this == &command_obj_sp->GetCommandInterpreter()) &&
"tried to add a CommandObject from a different interpreter");
std::unique_ptr<CommandAlias> command_alias_up(
new CommandAlias(*this, command_obj_sp, args_string, alias_name));
if (command_alias_up && command_alias_up->IsValid()) {
m_alias_dict[alias_name] = CommandObjectSP(command_alias_up.get());
return command_alias_up.release();
}
return nullptr;
}
bool CommandInterpreter::RemoveAlias(llvm::StringRef alias_name) {
auto pos = m_alias_dict.find(alias_name);
if (pos != m_alias_dict.end()) {
m_alias_dict.erase(pos);
return true;
}
return false;
}
bool CommandInterpreter::RemoveCommand(llvm::StringRef cmd) {
auto pos = m_command_dict.find(cmd);
if (pos != m_command_dict.end()) {
if (pos->second->IsRemovable()) {
// Only regular expression objects or python commands are removable
m_command_dict.erase(pos);
return true;
}
}
return false;
}
bool CommandInterpreter::RemoveUser(llvm::StringRef alias_name) {
CommandObject::CommandMap::iterator pos = m_user_dict.find(alias_name);
if (pos != m_user_dict.end()) {
m_user_dict.erase(pos);
return true;
}
return false;
}
void CommandInterpreter::GetHelp(CommandReturnObject &result,
uint32_t cmd_types) {
llvm::StringRef help_prologue(GetDebugger().GetIOHandlerHelpPrologue());
if (!help_prologue.empty()) {
OutputFormattedHelpText(result.GetOutputStream(), llvm::StringRef(),
help_prologue);
}
CommandObject::CommandMap::const_iterator pos;
size_t max_len = FindLongestCommandWord(m_command_dict);
if ((cmd_types & eCommandTypesBuiltin) == eCommandTypesBuiltin) {
result.AppendMessage("Debugger commands:");
result.AppendMessage("");
for (pos = m_command_dict.begin(); pos != m_command_dict.end(); ++pos) {
if (!(cmd_types & eCommandTypesHidden) &&
(pos->first.compare(0, 1, "_") == 0))
continue;
OutputFormattedHelpText(result.GetOutputStream(), pos->first, "--",
pos->second->GetHelp(), max_len);
}
result.AppendMessage("");
}
if (!m_alias_dict.empty() &&
((cmd_types & eCommandTypesAliases) == eCommandTypesAliases)) {
result.AppendMessageWithFormat(
"Current command abbreviations "
"(type '%shelp command alias' for more info):\n",
GetCommandPrefix());
result.AppendMessage("");
max_len = FindLongestCommandWord(m_alias_dict);
for (auto alias_pos = m_alias_dict.begin(); alias_pos != m_alias_dict.end();
++alias_pos) {
OutputFormattedHelpText(result.GetOutputStream(), alias_pos->first, "--",
alias_pos->second->GetHelp(), max_len);
}
result.AppendMessage("");
}
if (!m_user_dict.empty() &&
((cmd_types & eCommandTypesUserDef) == eCommandTypesUserDef)) {
result.AppendMessage("Current user-defined commands:");
result.AppendMessage("");
max_len = FindLongestCommandWord(m_user_dict);
for (pos = m_user_dict.begin(); pos != m_user_dict.end(); ++pos) {
OutputFormattedHelpText(result.GetOutputStream(), pos->first, "--",
pos->second->GetHelp(), max_len);
}
result.AppendMessage("");
}
result.AppendMessageWithFormat(
"For more information on any command, type '%shelp <command-name>'.\n",
GetCommandPrefix());
}
CommandObject *CommandInterpreter::GetCommandObjectForCommand(
llvm::StringRef &command_string) {
// This function finds the final, lowest-level, alias-resolved command object
// whose 'Execute' function will eventually be invoked by the given command
// line.
CommandObject *cmd_obj = nullptr;
size_t start = command_string.find_first_not_of(k_white_space);
size_t end = 0;
bool done = false;
while (!done) {
if (start != std::string::npos) {
// Get the next word from command_string.
end = command_string.find_first_of(k_white_space, start);
if (end == std::string::npos)
end = command_string.size();
std::string cmd_word = command_string.substr(start, end - start);
if (cmd_obj == nullptr)
// Since cmd_obj is NULL we are on our first time through this loop.
// Check to see if cmd_word is a valid command or alias.
cmd_obj = GetCommandObject(cmd_word);
else if (cmd_obj->IsMultiwordObject()) {
// Our current object is a multi-word object; see if the cmd_word is a
// valid sub-command for our object.
CommandObject *sub_cmd_obj =
cmd_obj->GetSubcommandObject(cmd_word.c_str());
if (sub_cmd_obj)
cmd_obj = sub_cmd_obj;
else // cmd_word was not a valid sub-command word, so we are done
done = true;
} else
// We have a cmd_obj and it is not a multi-word object, so we are done.
done = true;
// If we didn't find a valid command object, or our command object is not
// a multi-word object, or we are at the end of the command_string, then
// we are done. Otherwise, find the start of the next word.
if (!cmd_obj || !cmd_obj->IsMultiwordObject() ||
end >= command_string.size())
done = true;
else
start = command_string.find_first_not_of(k_white_space, end);
} else
// Unable to find any more words.
done = true;
}
command_string = command_string.substr(end);
return cmd_obj;
}
static const char *k_valid_command_chars =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_";
static void StripLeadingSpaces(std::string &s) {
if (!s.empty()) {
size_t pos = s.find_first_not_of(k_white_space);
if (pos == std::string::npos)
s.clear();
else if (pos == 0)
return;
s.erase(0, pos);
}
}
static size_t FindArgumentTerminator(const std::string &s) {
const size_t s_len = s.size();
size_t offset = 0;
while (offset < s_len) {
size_t pos = s.find("--", offset);
if (pos == std::string::npos)
break;
if (pos > 0) {
if (isspace(s[pos - 1])) {
// Check if the string ends "\s--" (where \s is a space character) or
// if we have "\s--\s".
if ((pos + 2 >= s_len) || isspace(s[pos + 2])) {
return pos;
}
}
}
offset = pos + 2;
}
return std::string::npos;
}
static bool ExtractCommand(std::string &command_string, std::string &command,
std::string &suffix, char &quote_char) {
command.clear();
suffix.clear();
StripLeadingSpaces(command_string);
bool result = false;
quote_char = '\0';
if (!command_string.empty()) {
const char first_char = command_string[0];
if (first_char == '\'' || first_char == '"') {
quote_char = first_char;
const size_t end_quote_pos = command_string.find(quote_char, 1);
if (end_quote_pos == std::string::npos) {
command.swap(command_string);
command_string.erase();
} else {
command.assign(command_string, 1, end_quote_pos - 1);
if (end_quote_pos + 1 < command_string.size())
command_string.erase(0, command_string.find_first_not_of(
k_white_space, end_quote_pos + 1));
else
command_string.erase();
}
} else {
const size_t first_space_pos =
command_string.find_first_of(k_white_space);
if (first_space_pos == std::string::npos) {
command.swap(command_string);
command_string.erase();
} else {
command.assign(command_string, 0, first_space_pos);
command_string.erase(0, command_string.find_first_not_of(
k_white_space, first_space_pos));
}
}
result = true;
}
if (!command.empty()) {
// actual commands can't start with '-' or '_'
if (command[0] != '-' && command[0] != '_') {
size_t pos = command.find_first_not_of(k_valid_command_chars);
if (pos > 0 && pos != std::string::npos) {
suffix.assign(command.begin() + pos, command.end());
command.erase(pos);
}
}
}
return result;
}
CommandObject *CommandInterpreter::BuildAliasResult(
llvm::StringRef alias_name, std::string &raw_input_string,
std::string &alias_result, CommandReturnObject &result) {
CommandObject *alias_cmd_obj = nullptr;
Args cmd_args(raw_input_string);
alias_cmd_obj = GetCommandObject(alias_name);
StreamString result_str;
if (!alias_cmd_obj || !alias_cmd_obj->IsAlias()) {
alias_result.clear();
return alias_cmd_obj;
}
std::pair<CommandObjectSP, OptionArgVectorSP> desugared =
((CommandAlias *)alias_cmd_obj)->Desugar();
OptionArgVectorSP option_arg_vector_sp = desugared.second;
alias_cmd_obj = desugared.first.get();
std::string alias_name_str = alias_name;
if ((cmd_args.GetArgumentCount() == 0) ||
(alias_name_str != cmd_args.GetArgumentAtIndex(0)))
cmd_args.Unshift(alias_name_str);
result_str.Printf("%s", alias_cmd_obj->GetCommandName().str().c_str());
if (!option_arg_vector_sp.get()) {
alias_result = result_str.GetString();
return alias_cmd_obj;
}
OptionArgVector *option_arg_vector = option_arg_vector_sp.get();
int value_type;
std::string option;
std::string value;
for (const auto &entry : *option_arg_vector) {
std::tie(option, value_type, value) = entry;
if (option == "<argument>") {
result_str.Printf(" %s", value.c_str());
continue;
}
result_str.Printf(" %s", option.c_str());
if (value_type == OptionParser::eNoArgument)
continue;
if (value_type != OptionParser::eOptionalArgument)
result_str.Printf(" ");
int index = GetOptionArgumentPosition(value.c_str());
if (index == 0)
result_str.Printf("%s", value.c_str());
else if (static_cast<size_t>(index) >= cmd_args.GetArgumentCount()) {
result.AppendErrorWithFormat("Not enough arguments provided; you "
"need at least %d arguments to use "
"this alias.\n",
index);
result.SetStatus(eReturnStatusFailed);
return nullptr;
} else {
size_t strpos = raw_input_string.find(cmd_args.GetArgumentAtIndex(index));
if (strpos != std::string::npos)
raw_input_string = raw_input_string.erase(
strpos, strlen(cmd_args.GetArgumentAtIndex(index)));
result_str.Printf("%s", cmd_args.GetArgumentAtIndex(index));
}
}
alias_result = result_str.GetString();
return alias_cmd_obj;
}
Status CommandInterpreter::PreprocessCommand(std::string &command) {
// The command preprocessor needs to do things to the command line before any
// parsing of arguments or anything else is done. The only current stuff that
// gets preprocessed is anything enclosed in backtick ('`') characters is
// evaluated as an expression and the result of the expression must be a
// scalar that can be substituted into the command. An example would be:
// (lldb) memory read `$rsp + 20`
Status error; // Status for any expressions that might not evaluate
size_t start_backtick;
size_t pos = 0;
while ((start_backtick = command.find('`', pos)) != std::string::npos) {
// Stop if an error was encountered during the previous iteration.
if (error.Fail())
break;
if (start_backtick > 0 && command[start_backtick - 1] == '\\') {
// The backtick was preceded by a '\' character, remove the slash and
// don't treat the backtick as the start of an expression.
command.erase(start_backtick - 1, 1);
// No need to add one to start_backtick since we just deleted a char.
pos = start_backtick;
continue;
}
const size_t expr_content_start = start_backtick + 1;
const size_t end_backtick = command.find('`', expr_content_start);
if (end_backtick == std::string::npos) {
// Stop if there's no end backtick.
break;
}
if (end_backtick == expr_content_start) {
// Skip over empty expression. (two backticks in a row)
command.erase(start_backtick, 2);
continue;
}
std::string expr_str(command, expr_content_start,
end_backtick - expr_content_start);
ExecutionContext exe_ctx(GetExecutionContext());
Target *target = exe_ctx.GetTargetPtr();
// Get a dummy target to allow for calculator mode while processing
// backticks. This also helps break the infinite loop caused when target is
// null.
if (!target)
target = m_debugger.GetDummyTarget();
if (!target)
continue;
ValueObjectSP expr_result_valobj_sp;
EvaluateExpressionOptions options;
options.SetCoerceToId(false);
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetKeepInMemory(false);
options.SetTryAllThreads(true);
options.SetTimeout(llvm::None);
ExpressionResults expr_result =
target->EvaluateExpression(expr_str.c_str(), exe_ctx.GetFramePtr(),
expr_result_valobj_sp, options);
if (expr_result == eExpressionCompleted) {
Scalar scalar;
if (expr_result_valobj_sp)
expr_result_valobj_sp =
expr_result_valobj_sp->GetQualifiedRepresentationIfAvailable(
expr_result_valobj_sp->GetDynamicValueType(), true);
if (expr_result_valobj_sp->ResolveValue(scalar)) {
command.erase(start_backtick, end_backtick - start_backtick + 1);
StreamString value_strm;
const bool show_type = false;
scalar.GetValue(&value_strm, show_type);
size_t value_string_size = value_strm.GetSize();
if (value_string_size) {
command.insert(start_backtick, value_strm.GetString());
pos = start_backtick + value_string_size;
continue;
} else {
error.SetErrorStringWithFormat("expression value didn't result "
"in a scalar value for the "
"expression '%s'",
expr_str.c_str());
break;
}
} else {
error.SetErrorStringWithFormat("expression value didn't result "
"in a scalar value for the "
"expression '%s'",
expr_str.c_str());
break;
}
continue;
}
if (expr_result_valobj_sp)
error = expr_result_valobj_sp->GetError();
if (error.Success()) {
switch (expr_result) {
case eExpressionSetupError:
error.SetErrorStringWithFormat(
"expression setup error for the expression '%s'", expr_str.c_str());
break;
case eExpressionParseError:
error.SetErrorStringWithFormat(
"expression parse error for the expression '%s'", expr_str.c_str());
break;
case eExpressionResultUnavailable:
error.SetErrorStringWithFormat(
"expression error fetching result for the expression '%s'",
expr_str.c_str());
break;
case eExpressionCompleted:
break;
case eExpressionDiscarded:
error.SetErrorStringWithFormat(
"expression discarded for the expression '%s'", expr_str.c_str());
break;
case eExpressionInterrupted:
error.SetErrorStringWithFormat(
"expression interrupted for the expression '%s'", expr_str.c_str());
break;
case eExpressionHitBreakpoint:
error.SetErrorStringWithFormat(
"expression hit breakpoint for the expression '%s'",
expr_str.c_str());
break;
case eExpressionTimedOut:
error.SetErrorStringWithFormat(
"expression timed out for the expression '%s'", expr_str.c_str());
break;
case eExpressionStoppedForDebug:
error.SetErrorStringWithFormat("expression stop at entry point "
"for debugging for the "
"expression '%s'",
expr_str.c_str());
break;
}
}
}
return error;
}
bool CommandInterpreter::HandleCommand(const char *command_line,
LazyBool lazy_add_to_history,
CommandReturnObject &result,
ExecutionContext *override_context,
bool repeat_on_empty_command,
bool no_context_switching)
{
std::string command_string(command_line);
std::string original_command_string(command_line);
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_COMMANDS));
llvm::PrettyStackTraceFormat stack_trace("HandleCommand(command = \"%s\")",
command_line);
if (log)
log->Printf("Processing command: %s", command_line);
static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
Timer scoped_timer(func_cat, "Handling command: %s.", command_line);
if (!no_context_switching)
UpdateExecutionContext(override_context);
if (WasInterrupted()) {
result.AppendError("interrupted");
result.SetStatus(eReturnStatusFailed);
return false;
}
bool add_to_history;
if (lazy_add_to_history == eLazyBoolCalculate)
add_to_history = (m_command_source_depth == 0);
else
add_to_history = (lazy_add_to_history == eLazyBoolYes);
bool empty_command = false;
bool comment_command = false;
if (command_string.empty())
empty_command = true;
else {
const char *k_space_characters = "\t\n\v\f\r ";
size_t non_space = command_string.find_first_not_of(k_space_characters);
// Check for empty line or comment line (lines whose first non-space
// character is the comment character for this interpreter)
if (non_space == std::string::npos)
empty_command = true;
else if (command_string[non_space] == m_comment_char)
comment_command = true;
else if (command_string[non_space] == CommandHistory::g_repeat_char) {
llvm::StringRef search_str(command_string);
search_str = search_str.drop_front(non_space);
if (auto hist_str = m_command_history.FindString(search_str)) {
add_to_history = false;
command_string = *hist_str;
original_command_string = *hist_str;
} else {
result.AppendErrorWithFormat("Could not find entry: %s in history",
command_string.c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
}
}
if (empty_command) {
if (repeat_on_empty_command) {
if (m_command_history.IsEmpty()) {
result.AppendError("empty command");
result.SetStatus(eReturnStatusFailed);
return false;
} else {
command_line = m_repeat_command.c_str();
command_string = command_line;
original_command_string = command_line;
if (m_repeat_command.empty()) {
result.AppendErrorWithFormat("No auto repeat.\n");
result.SetStatus(eReturnStatusFailed);
return false;
}
}
add_to_history = false;
} else {
result.SetStatus(eReturnStatusSuccessFinishNoResult);
return true;
}
} else if (comment_command) {
result.SetStatus(eReturnStatusSuccessFinishNoResult);
return true;
}
Status error(PreprocessCommand(command_string));
if (error.Fail()) {
result.AppendError(error.AsCString());
result.SetStatus(eReturnStatusFailed);
return false;
}
// Phase 1.
// Before we do ANY kind of argument processing, we need to figure out what
// the real/final command object is for the specified command. This gets
// complicated by the fact that the user could have specified an alias, and,
// in translating the alias, there may also be command options and/or even
// data (including raw text strings) that need to be found and inserted into
// the command line as part of the translation. So this first step is plain
// look-up and replacement, resulting in:
// 1. the command object whose Execute method will actually be called
// 2. a revised command string, with all substitutions and replacements
// taken care of
// From 1 above, we can determine whether the Execute function wants raw
// input or not.
CommandObject *cmd_obj = ResolveCommandImpl(command_string, result);
// Although the user may have abbreviated the command, the command_string now
// has the command expanded to the full name. For example, if the input was
// "br s -n main", command_string is now "breakpoint set -n main".
if (log) {
llvm::StringRef command_name = cmd_obj ? cmd_obj->GetCommandName() : "<not found>";
log->Printf("HandleCommand, cmd_obj : '%s'", command_name.str().c_str());
log->Printf("HandleCommand, (revised) command_string: '%s'",
command_string.c_str());
const bool wants_raw_input =
(cmd_obj != NULL) ? cmd_obj->WantsRawCommandString() : false;
log->Printf("HandleCommand, wants_raw_input:'%s'",
wants_raw_input ? "True" : "False");
}
// Phase 2.
// Take care of things like setting up the history command & calling the
// appropriate Execute method on the CommandObject, with the appropriate
// arguments.
if (cmd_obj != nullptr) {
if (add_to_history) {
Args command_args(command_string);
const char *repeat_command = cmd_obj->GetRepeatCommand(command_args, 0);
if (repeat_command != nullptr)
m_repeat_command.assign(repeat_command);
else
m_repeat_command.assign(original_command_string);
m_command_history.AppendString(original_command_string);
}
std::string remainder;
const std::size_t actual_cmd_name_len = cmd_obj->GetCommandName().size();
if (actual_cmd_name_len < command_string.length())
remainder = command_string.substr(actual_cmd_name_len);
// Remove any initial spaces
size_t pos = remainder.find_first_not_of(k_white_space);
if (pos != 0 && pos != std::string::npos)
remainder.erase(0, pos);
if (log)
log->Printf(
"HandleCommand, command line after removing command name(s): '%s'",
remainder.c_str());
cmd_obj->Execute(remainder.c_str(), result);
}
if (log)
log->Printf("HandleCommand, command %s",
(result.Succeeded() ? "succeeded" : "did not succeed"));
return result.Succeeded();
}
int CommandInterpreter::HandleCompletionMatches(CompletionRequest &request) {
int num_command_matches = 0;
bool look_for_subcommand = false;
// For any of the command completions a unique match will be a complete word.
request.SetWordComplete(true);
if (request.GetCursorIndex() == -1) {
// We got nothing on the command line, so return the list of commands
bool include_aliases = true;
StringList new_matches, descriptions;
num_command_matches = GetCommandNamesMatchingPartialString(
"", include_aliases, new_matches, descriptions);
request.AddCompletions(new_matches, descriptions);
} else if (request.GetCursorIndex() == 0) {
// The cursor is in the first argument, so just do a lookup in the
// dictionary.
StringList new_matches, new_descriptions;
CommandObject *cmd_obj =
GetCommandObject(request.GetParsedLine().GetArgumentAtIndex(0),
&new_matches, &new_descriptions);
if (num_command_matches == 1 && cmd_obj && cmd_obj->IsMultiwordObject() &&
new_matches.GetStringAtIndex(0) != nullptr &&
strcmp(request.GetParsedLine().GetArgumentAtIndex(0),
new_matches.GetStringAtIndex(0)) == 0) {
if (request.GetParsedLine().GetArgumentCount() == 1) {
request.SetWordComplete(true);
} else {
look_for_subcommand = true;
num_command_matches = 0;
new_matches.DeleteStringAtIndex(0);
new_descriptions.DeleteStringAtIndex(0);
request.GetParsedLine().AppendArgument(llvm::StringRef());
request.SetCursorIndex(request.GetCursorIndex() + 1);
request.SetCursorCharPosition(0);
}
}
request.AddCompletions(new_matches, new_descriptions);
num_command_matches = request.GetNumberOfMatches();
}
if (request.GetCursorIndex() > 0 || look_for_subcommand) {
// We are completing further on into a commands arguments, so find the
// command and tell it to complete the command. First see if there is a
// matching initial command:
CommandObject *command_object =
GetCommandObject(request.GetParsedLine().GetArgumentAtIndex(0));
if (command_object == nullptr) {
return 0;
} else {
request.GetParsedLine().Shift();
request.SetCursorIndex(request.GetCursorIndex() - 1);
num_command_matches = command_object->HandleCompletion(request);
}
}
return num_command_matches;
}
int CommandInterpreter::HandleCompletion(
const char *current_line, const char *cursor, const char *last_char,
int match_start_point, int max_return_elements, StringList &matches,
StringList &descriptions) {
llvm::StringRef command_line(current_line, last_char - current_line);
CompletionResult result;
CompletionRequest request(command_line, cursor - current_line,
match_start_point, max_return_elements, result);
// Don't complete comments, and if the line we are completing is just the
// history repeat character, substitute the appropriate history line.
const char *first_arg = request.GetParsedLine().GetArgumentAtIndex(0);
if (first_arg) {
if (first_arg[0] == m_comment_char)
return 0;
else if (first_arg[0] == CommandHistory::g_repeat_char) {
if (auto hist_str = m_command_history.FindString(first_arg)) {
matches.InsertStringAtIndex(0, *hist_str);
descriptions.InsertStringAtIndex(0, "Previous command history event");
return -2;
} else
return 0;
}
}
// Only max_return_elements == -1 is supported at present:
lldbassert(max_return_elements == -1);
int num_command_matches = HandleCompletionMatches(request);
result.GetMatches(matches);
result.GetDescriptions(descriptions);
if (num_command_matches <= 0)
return num_command_matches;
if (request.GetParsedLine().GetArgumentCount() == 0) {
// If we got an empty string, insert nothing.
matches.InsertStringAtIndex(0, "");
descriptions.InsertStringAtIndex(0, "");
} else {
// Now figure out if there is a common substring, and if so put that in
// element 0, otherwise put an empty string in element 0.
std::string command_partial_str = request.GetCursorArgumentPrefix().str();
std::string common_prefix;
matches.LongestCommonPrefix(common_prefix);
const size_t partial_name_len = command_partial_str.size();
common_prefix.erase(0, partial_name_len);
// If we matched a unique single command, add a space... Only do this if
// the completer told us this was a complete word, however...
if (num_command_matches == 1 && request.GetWordComplete()) {
char quote_char = request.GetParsedLine()[request.GetCursorIndex()].quote;
common_prefix =
Args::EscapeLLDBCommandArgument(common_prefix, quote_char);
if (quote_char != '\0')
common_prefix.push_back(quote_char);
common_prefix.push_back(' ');
}
matches.InsertStringAtIndex(0, common_prefix.c_str());
descriptions.InsertStringAtIndex(0, "");
}
return num_command_matches;
}
CommandInterpreter::~CommandInterpreter() {}
void CommandInterpreter::UpdatePrompt(llvm::StringRef new_prompt) {
EventSP prompt_change_event_sp(
new Event(eBroadcastBitResetPrompt, new EventDataBytes(new_prompt)));
;
BroadcastEvent(prompt_change_event_sp);
if (m_command_io_handler_sp)
m_command_io_handler_sp->SetPrompt(new_prompt);
}
bool CommandInterpreter::Confirm(llvm::StringRef message, bool default_answer) {
// Check AutoConfirm first:
if (m_debugger.GetAutoConfirm())
return default_answer;
IOHandlerConfirm *confirm =
new IOHandlerConfirm(m_debugger, message, default_answer);
IOHandlerSP io_handler_sp(confirm);
m_debugger.RunIOHandler(io_handler_sp);
return confirm->GetResponse();
}
const CommandAlias *
CommandInterpreter::GetAlias(llvm::StringRef alias_name) const {
OptionArgVectorSP ret_val;
auto pos = m_alias_dict.find(alias_name);
if (pos != m_alias_dict.end())
return (CommandAlias *)pos->second.get();
return nullptr;
}
bool CommandInterpreter::HasCommands() const { return (!m_command_dict.empty()); }
bool CommandInterpreter::HasAliases() const { return (!m_alias_dict.empty()); }
bool CommandInterpreter::HasUserCommands() const { return (!m_user_dict.empty()); }
bool CommandInterpreter::HasAliasOptions() const { return HasAliases(); }
void CommandInterpreter::BuildAliasCommandArgs(CommandObject *alias_cmd_obj,
const char *alias_name,
Args &cmd_args,
std::string &raw_input_string,
CommandReturnObject &result) {
OptionArgVectorSP option_arg_vector_sp =
GetAlias(alias_name)->GetOptionArguments();
bool wants_raw_input = alias_cmd_obj->WantsRawCommandString();
// Make sure that the alias name is the 0th element in cmd_args
std::string alias_name_str = alias_name;
if (alias_name_str != cmd_args.GetArgumentAtIndex(0))
cmd_args.Unshift(alias_name_str);
Args new_args(alias_cmd_obj->GetCommandName());
if (new_args.GetArgumentCount() == 2)
new_args.Shift();
if (option_arg_vector_sp.get()) {
if (wants_raw_input) {
// We have a command that both has command options and takes raw input.
// Make *sure* it has a " -- " in the right place in the
// raw_input_string.
size_t pos = raw_input_string.find(" -- ");
if (pos == std::string::npos) {
// None found; assume it goes at the beginning of the raw input string
raw_input_string.insert(0, " -- ");
}
}
OptionArgVector *option_arg_vector = option_arg_vector_sp.get();
const size_t old_size = cmd_args.GetArgumentCount();
std::vector<bool> used(old_size + 1, false);
used[0] = true;
int value_type;
std::string option;
std::string value;
for (const auto &option_entry : *option_arg_vector) {
std::tie(option, value_type, value) = option_entry;
if (option == "<argument>") {
if (!wants_raw_input || (value != "--")) {
// Since we inserted this above, make sure we don't insert it twice
new_args.AppendArgument(value);
}
continue;
}
if (value_type != OptionParser::eOptionalArgument)
new_args.AppendArgument(option);
if (value == "<no-argument>")
continue;
int index = GetOptionArgumentPosition(value.c_str());
if (index == 0) {
// value was NOT a positional argument; must be a real value
if (value_type != OptionParser::eOptionalArgument)
new_args.AppendArgument(value);
else {
char buffer[255];
::snprintf(buffer, sizeof(buffer), "%s%s", option.c_str(),
value.c_str());
new_args.AppendArgument(llvm::StringRef(buffer));
}
} else if (static_cast<size_t>(index) >= cmd_args.GetArgumentCount()) {
result.AppendErrorWithFormat("Not enough arguments provided; you "
"need at least %d arguments to use "
"this alias.\n",
index);
result.SetStatus(eReturnStatusFailed);
return;
} else {
// Find and remove cmd_args.GetArgumentAtIndex(i) from raw_input_string
size_t strpos =
raw_input_string.find(cmd_args.GetArgumentAtIndex(index));
if (strpos != std::string::npos) {
raw_input_string = raw_input_string.erase(
strpos, strlen(cmd_args.GetArgumentAtIndex(index)));
}
if (value_type != OptionParser::eOptionalArgument)
new_args.AppendArgument(cmd_args.GetArgumentAtIndex(index));
else {
char buffer[255];
::snprintf(buffer, sizeof(buffer), "%s%s", option.c_str(),
cmd_args.GetArgumentAtIndex(index));
new_args.AppendArgument(buffer);
}
used[index] = true;
}
}
for (auto entry : llvm::enumerate(cmd_args.entries())) {
if (!used[entry.index()] && !wants_raw_input)
new_args.AppendArgument(entry.value().ref);
}
cmd_args.Clear();
cmd_args.SetArguments(new_args.GetArgumentCount(),
new_args.GetConstArgumentVector());
} else {
result.SetStatus(eReturnStatusSuccessFinishNoResult);
// This alias was not created with any options; nothing further needs to be
// done, unless it is a command that wants raw input, in which case we need
// to clear the rest of the data from cmd_args, since its in the raw input
// string.
if (wants_raw_input) {
cmd_args.Clear();
cmd_args.SetArguments(new_args.GetArgumentCount(),
new_args.GetConstArgumentVector());
}
return;
}
result.SetStatus(eReturnStatusSuccessFinishNoResult);
return;
}
int CommandInterpreter::GetOptionArgumentPosition(const char *in_string) {
int position = 0; // Any string that isn't an argument position, i.e. '%'
// followed by an integer, gets a position
// of zero.
const char *cptr = in_string;
// Does it start with '%'
if (cptr[0] == '%') {
++cptr;
// Is the rest of it entirely digits?
if (isdigit(cptr[0])) {
const char *start = cptr;
while (isdigit(cptr[0]))
++cptr;
// We've gotten to the end of the digits; are we at the end of the
// string?
if (cptr[0] == '\0')
position = atoi(start);
}
}
return position;
}
void CommandInterpreter::SourceInitFile(bool in_cwd,
CommandReturnObject &result) {
FileSpec init_file;
if (in_cwd) {
ExecutionContext exe_ctx(GetExecutionContext());
Target *target = exe_ctx.GetTargetPtr();
if (target) {
// In the current working directory we don't load any program specific
// .lldbinit files, we only look for a ".lldbinit" file.
if (m_skip_lldbinit_files)
return;
LoadCWDlldbinitFile should_load =
target->TargetProperties::GetLoadCWDlldbinitFile();
if (should_load == eLoadCWDlldbinitWarn) {
FileSpec dot_lldb(".lldbinit");
FileSystem::Instance().Resolve(dot_lldb);
llvm::SmallString<64> home_dir_path;
llvm::sys::path::home_directory(home_dir_path);
FileSpec homedir_dot_lldb(home_dir_path.c_str());
homedir_dot_lldb.AppendPathComponent(".lldbinit");
FileSystem::Instance().Resolve(homedir_dot_lldb);
if (FileSystem::Instance().Exists(dot_lldb) &&
dot_lldb.GetDirectory() != homedir_dot_lldb.GetDirectory()) {
result.AppendErrorWithFormat(
"There is a .lldbinit file in the current directory which is not "
"being read.\n"
"To silence this warning without sourcing in the local "
".lldbinit,\n"
"add the following to the lldbinit file in your home directory:\n"
" settings set target.load-cwd-lldbinit false\n"
"To allow lldb to source .lldbinit files in the current working "
"directory,\n"
"set the value of this variable to true. Only do so if you "
"understand and\n"
"accept the security risk.");
result.SetStatus(eReturnStatusFailed);
return;
}
} else if (should_load == eLoadCWDlldbinitTrue) {
init_file.SetFile("./.lldbinit", FileSpec::Style::native);
FileSystem::Instance().Resolve(init_file);
}
}
} else {
// If we aren't looking in the current working directory we are looking in
// the home directory. We will first see if there is an application
// specific ".lldbinit" file whose name is "~/.lldbinit" followed by a "-"
// and the name of the program. If this file doesn't exist, we fall back to
// just the "~/.lldbinit" file. We also obey any requests to not load the
// init files.
llvm::SmallString<64> home_dir_path;
llvm::sys::path::home_directory(home_dir_path);
FileSpec profilePath(home_dir_path.c_str());
profilePath.AppendPathComponent(".lldbinit");
std::string init_file_path = profilePath.GetPath();
if (!m_skip_app_init_files) {
FileSpec program_file_spec(HostInfo::GetProgramFileSpec());
const char *program_name = program_file_spec.GetFilename().AsCString();
if (program_name) {
char program_init_file_name[PATH_MAX];
::snprintf(program_init_file_name, sizeof(program_init_file_name),
"%s-%s", init_file_path.c_str(), program_name);
init_file.SetFile(program_init_file_name, FileSpec::Style::native);
FileSystem::Instance().Resolve(init_file);
if (!FileSystem::Instance().Exists(init_file))
init_file.Clear();
}
}
if (!init_file && !m_skip_lldbinit_files)
init_file.SetFile(init_file_path, FileSpec::Style::native);
}
// If the file exists, tell HandleCommand to 'source' it; this will do the
// actual broadcasting of the commands back to any appropriate listener (see
// CommandObjectSource::Execute for more details).
if (FileSystem::Instance().Exists(init_file)) {
const bool saved_batch = SetBatchCommandMode(true);
CommandInterpreterRunOptions options;
options.SetSilent(true);
options.SetStopOnError(false);
options.SetStopOnContinue(true);
HandleCommandsFromFile(init_file,
nullptr, // Execution context
options, result);
SetBatchCommandMode(saved_batch);
} else {
// nothing to be done if the file doesn't exist
result.SetStatus(eReturnStatusSuccessFinishNoResult);
}
}
const char *CommandInterpreter::GetCommandPrefix() {
const char *prefix = GetDebugger().GetIOHandlerCommandPrefix();
return prefix == NULL ? "" : prefix;
}
PlatformSP CommandInterpreter::GetPlatform(bool prefer_target_platform) {
PlatformSP platform_sp;
if (prefer_target_platform) {
ExecutionContext exe_ctx(GetExecutionContext());
Target *target = exe_ctx.GetTargetPtr();
if (target)
platform_sp = target->GetPlatform();
}
if (!platform_sp)
platform_sp = m_debugger.GetPlatformList().GetSelectedPlatform();
return platform_sp;
}
void CommandInterpreter::HandleCommands(const StringList &commands,
ExecutionContext *override_context,
CommandInterpreterRunOptions &options,
CommandReturnObject &result) {
size_t num_lines = commands.GetSize();
// If we are going to continue past a "continue" then we need to run the
// commands synchronously. Make sure you reset this value anywhere you return
// from the function.
bool old_async_execution = m_debugger.GetAsyncExecution();
// If we've been given an execution context, set it at the start, but don't
// keep resetting it or we will cause series of commands that change the
// context, then do an operation that relies on that context to fail.
if (override_context != nullptr)
UpdateExecutionContext(override_context);
if (!options.GetStopOnContinue()) {
m_debugger.SetAsyncExecution(false);
}
for (size_t idx = 0; idx < num_lines && !WasInterrupted(); idx++) {
const char *cmd = commands.GetStringAtIndex(idx);
if (cmd[0] == '\0')
continue;
if (options.GetEchoCommands()) {
// TODO: Add Stream support.
result.AppendMessageWithFormat("%s %s\n",
m_debugger.GetPrompt().str().c_str(), cmd);
}
CommandReturnObject tmp_result;
// If override_context is not NULL, pass no_context_switching = true for
// HandleCommand() since we updated our context already.
// We might call into a regex or alias command, in which case the
// add_to_history will get lost. This m_command_source_depth dingus is the
// way we turn off adding to the history in that case, so set it up here.
if (!options.GetAddToHistory())
m_command_source_depth++;
bool success =
HandleCommand(cmd, options.m_add_to_history, tmp_result,
nullptr, /* override_context */
true, /* repeat_on_empty_command */
override_context != nullptr /* no_context_switching */);
if (!options.GetAddToHistory())
m_command_source_depth--;
if (options.GetPrintResults()) {
if (tmp_result.Succeeded())
result.AppendMessage(tmp_result.GetOutputData());
}
if (!success || !tmp_result.Succeeded()) {
llvm::StringRef error_msg = tmp_result.GetErrorData();
if (error_msg.empty())
error_msg = "<unknown error>.\n";
if (options.GetStopOnError()) {
result.AppendErrorWithFormat(
"Aborting reading of commands after command #%" PRIu64
": '%s' failed with %s",
(uint64_t)idx, cmd, error_msg.str().c_str());
result.SetStatus(eReturnStatusFailed);
m_debugger.SetAsyncExecution(old_async_execution);
return;
} else if (options.GetPrintResults()) {
result.AppendMessageWithFormat(
"Command #%" PRIu64 " '%s' failed with %s", (uint64_t)idx + 1, cmd,
error_msg.str().c_str());
}
}
if (result.GetImmediateOutputStream())
result.GetImmediateOutputStream()->Flush();
if (result.GetImmediateErrorStream())
result.GetImmediateErrorStream()->Flush();
// N.B. Can't depend on DidChangeProcessState, because the state coming
// into the command execution could be running (for instance in Breakpoint
// Commands. So we check the return value to see if it is has running in
// it.
if ((tmp_result.GetStatus() == eReturnStatusSuccessContinuingNoResult) ||
(tmp_result.GetStatus() == eReturnStatusSuccessContinuingResult)) {
if (options.GetStopOnContinue()) {
// If we caused the target to proceed, and we're going to stop in that
// case, set the status in our real result before returning. This is
// an error if the continue was not the last command in the set of
// commands to be run.
if (idx != num_lines - 1)
result.AppendErrorWithFormat(
"Aborting reading of commands after command #%" PRIu64
": '%s' continued the target.\n",
(uint64_t)idx + 1, cmd);
else
result.AppendMessageWithFormat("Command #%" PRIu64
" '%s' continued the target.\n",
(uint64_t)idx + 1, cmd);
result.SetStatus(tmp_result.GetStatus());
m_debugger.SetAsyncExecution(old_async_execution);
return;
}
}
// Also check for "stop on crash here:
bool should_stop = false;
if (tmp_result.GetDidChangeProcessState() && options.GetStopOnCrash()) {
TargetSP target_sp(m_debugger.GetTargetList().GetSelectedTarget());
if (target_sp) {
ProcessSP process_sp(target_sp->GetProcessSP());
if (process_sp) {
for (ThreadSP thread_sp : process_sp->GetThreadList().Threads()) {
StopReason reason = thread_sp->GetStopReason();
if (reason == eStopReasonSignal || reason == eStopReasonException ||
reason == eStopReasonInstrumentation) {
should_stop = true;
break;
}
}
}
}
if (should_stop) {
if (idx != num_lines - 1)
result.AppendErrorWithFormat(
"Aborting reading of commands after command #%" PRIu64
": '%s' stopped with a signal or exception.\n",
(uint64_t)idx + 1, cmd);
else
result.AppendMessageWithFormat(
"Command #%" PRIu64 " '%s' stopped with a signal or exception.\n",
(uint64_t)idx + 1, cmd);
result.SetStatus(tmp_result.GetStatus());
m_debugger.SetAsyncExecution(old_async_execution);
return;
}
}
}
result.SetStatus(eReturnStatusSuccessFinishResult);
m_debugger.SetAsyncExecution(old_async_execution);
return;
}
// Make flags that we can pass into the IOHandler so our delegates can do the
// right thing
enum {
eHandleCommandFlagStopOnContinue = (1u << 0),
eHandleCommandFlagStopOnError = (1u << 1),
eHandleCommandFlagEchoCommand = (1u << 2),
eHandleCommandFlagEchoCommentCommand = (1u << 3),
eHandleCommandFlagPrintResult = (1u << 4),
eHandleCommandFlagStopOnCrash = (1u << 5)
};
void CommandInterpreter::HandleCommandsFromFile(
FileSpec &cmd_file, ExecutionContext *context,
CommandInterpreterRunOptions &options, CommandReturnObject &result) {
if (FileSystem::Instance().Exists(cmd_file)) {
StreamFileSP input_file_sp(new StreamFile());
std::string cmd_file_path = cmd_file.GetPath();
Status error = FileSystem::Instance().Open(input_file_sp->GetFile(),
cmd_file, File::eOpenOptionRead);
if (error.Success()) {
Debugger &debugger = GetDebugger();
uint32_t flags = 0;
if (options.m_stop_on_continue == eLazyBoolCalculate) {
if (m_command_source_flags.empty()) {
// Stop on continue by default
flags |= eHandleCommandFlagStopOnContinue;
} else if (m_command_source_flags.back() &
eHandleCommandFlagStopOnContinue) {
flags |= eHandleCommandFlagStopOnContinue;
}
} else if (options.m_stop_on_continue == eLazyBoolYes) {
flags |= eHandleCommandFlagStopOnContinue;
}
if (options.m_stop_on_error == eLazyBoolCalculate) {
if (m_command_source_flags.empty()) {
if (GetStopCmdSourceOnError())
flags |= eHandleCommandFlagStopOnError;
} else if (m_command_source_flags.back() &
eHandleCommandFlagStopOnError) {
flags |= eHandleCommandFlagStopOnError;
}
} else if (options.m_stop_on_error == eLazyBoolYes) {
flags |= eHandleCommandFlagStopOnError;
}
// stop-on-crash can only be set, if it is present in all levels of
// pushed flag sets.
if (options.GetStopOnCrash()) {
if (m_command_source_flags.empty()) {
flags |= eHandleCommandFlagStopOnCrash;
} else if (m_command_source_flags.back() &
eHandleCommandFlagStopOnCrash) {
flags |= eHandleCommandFlagStopOnCrash;
}
}
if (options.m_echo_commands == eLazyBoolCalculate) {
if (m_command_source_flags.empty()) {
// Echo command by default
flags |= eHandleCommandFlagEchoCommand;
} else if (m_command_source_flags.back() &
eHandleCommandFlagEchoCommand) {
flags |= eHandleCommandFlagEchoCommand;
}
} else if (options.m_echo_commands == eLazyBoolYes) {
flags |= eHandleCommandFlagEchoCommand;
}
// We will only ever ask for this flag, if we echo commands in general.
if (options.m_echo_comment_commands == eLazyBoolCalculate) {
if (m_command_source_flags.empty()) {
// Echo comments by default
flags |= eHandleCommandFlagEchoCommentCommand;
} else if (m_command_source_flags.back() &
eHandleCommandFlagEchoCommentCommand) {
flags |= eHandleCommandFlagEchoCommentCommand;
}
} else if (options.m_echo_comment_commands == eLazyBoolYes) {
flags |= eHandleCommandFlagEchoCommentCommand;
}
if (options.m_print_results == eLazyBoolCalculate) {
if (m_command_source_flags.empty()) {
// Print output by default
flags |= eHandleCommandFlagPrintResult;
} else if (m_command_source_flags.back() &
eHandleCommandFlagPrintResult) {
flags |= eHandleCommandFlagPrintResult;
}
} else if (options.m_print_results == eLazyBoolYes) {
flags |= eHandleCommandFlagPrintResult;
}
if (flags & eHandleCommandFlagPrintResult) {
debugger.GetOutputFile()->Printf("Executing commands in '%s'.\n",
cmd_file_path.c_str());
}
// Used for inheriting the right settings when "command source" might
// have nested "command source" commands
lldb::StreamFileSP empty_stream_sp;
m_command_source_flags.push_back(flags);
IOHandlerSP io_handler_sp(new IOHandlerEditline(
debugger, IOHandler::Type::CommandInterpreter, input_file_sp,
empty_stream_sp, // Pass in an empty stream so we inherit the top
// input reader output stream
empty_stream_sp, // Pass in an empty stream so we inherit the top
// input reader error stream
flags,
nullptr, // Pass in NULL for "editline_name" so no history is saved,
// or written
debugger.GetPrompt(), llvm::StringRef(),
false, // Not multi-line
debugger.GetUseColor(), 0, *this));
const bool old_async_execution = debugger.GetAsyncExecution();
// Set synchronous execution if we are not stopping on continue
if ((flags & eHandleCommandFlagStopOnContinue) == 0)
debugger.SetAsyncExecution(false);
m_command_source_depth++;
debugger.RunIOHandler(io_handler_sp);
if (!m_command_source_flags.empty())
m_command_source_flags.pop_back();
m_command_source_depth--;
result.SetStatus(eReturnStatusSuccessFinishNoResult);
debugger.SetAsyncExecution(old_async_execution);
} else {
result.AppendErrorWithFormat(
"error: an error occurred read file '%s': %s\n",
cmd_file_path.c_str(), error.AsCString());
result.SetStatus(eReturnStatusFailed);
}
} else {
result.AppendErrorWithFormat(
"Error reading commands from file %s - file not found.\n",
cmd_file.GetFilename().AsCString("<Unknown>"));
result.SetStatus(eReturnStatusFailed);
return;
}
}
ScriptInterpreter *CommandInterpreter::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;
lldb::ScriptLanguage script_lang = GetDebugger().GetScriptLanguage();
m_script_interpreter_sp =
PluginManager::GetScriptInterpreterForLanguage(script_lang, *this);
}
return m_script_interpreter_sp.get();
}
bool CommandInterpreter::GetSynchronous() { return m_synchronous_execution; }
void CommandInterpreter::SetSynchronous(bool value) {
m_synchronous_execution = value;
}
void CommandInterpreter::OutputFormattedHelpText(Stream &strm,
llvm::StringRef prefix,
llvm::StringRef help_text) {
const uint32_t max_columns = m_debugger.GetTerminalWidth();
size_t line_width_max = max_columns - prefix.size();
if (line_width_max < 16)
line_width_max = help_text.size() + prefix.size();
strm.IndentMore(prefix.size());
bool prefixed_yet = false;
while (!help_text.empty()) {
// Prefix the first line, indent subsequent lines to line up
if (!prefixed_yet) {
strm << prefix;
prefixed_yet = true;
} else
strm.Indent();
// Never print more than the maximum on one line.
llvm::StringRef this_line = help_text.substr(0, line_width_max);
// Always break on an explicit newline.
std::size_t first_newline = this_line.find_first_of("\n");
// Don't break on space/tab unless the text is too long to fit on one line.
std::size_t last_space = llvm::StringRef::npos;
if (this_line.size() != help_text.size())
last_space = this_line.find_last_of(" \t");
// Break at whichever condition triggered first.
this_line = this_line.substr(0, std::min(first_newline, last_space));
strm.PutCString(this_line);
strm.EOL();
// Remove whitespace / newlines after breaking.
help_text = help_text.drop_front(this_line.size()).ltrim();
}
strm.IndentLess(prefix.size());
}
void CommandInterpreter::OutputFormattedHelpText(Stream &strm,
llvm::StringRef word_text,
llvm::StringRef separator,
llvm::StringRef help_text,
size_t max_word_len) {
StreamString prefix_stream;
prefix_stream.Printf(" %-*s %*s ", (int)max_word_len, word_text.data(),
(int)separator.size(), separator.data());
OutputFormattedHelpText(strm, prefix_stream.GetString(), help_text);
}
void CommandInterpreter::OutputHelpText(Stream &strm, llvm::StringRef word_text,
llvm::StringRef separator,
llvm::StringRef help_text,
uint32_t max_word_len) {
int indent_size = max_word_len + separator.size() + 2;
strm.IndentMore(indent_size);
StreamString text_strm;
text_strm.Printf("%-*s ", (int)max_word_len, word_text.data());
text_strm << separator << " " << help_text;
const uint32_t max_columns = m_debugger.GetTerminalWidth();
llvm::StringRef text = text_strm.GetString();
uint32_t chars_left = max_columns;
auto nextWordLength = [](llvm::StringRef S) {
size_t pos = S.find_first_of(' ');
return pos == llvm::StringRef::npos ? S.size() : pos;
};
while (!text.empty()) {
if (text.front() == '\n' ||
(text.front() == ' ' && nextWordLength(text.ltrim(' ')) > chars_left)) {
strm.EOL();
strm.Indent();
chars_left = max_columns - indent_size;
if (text.front() == '\n')
text = text.drop_front();
else
text = text.ltrim(' ');
} else {
strm.PutChar(text.front());
--chars_left;
text = text.drop_front();
}
}
strm.EOL();
strm.IndentLess(indent_size);
}
void CommandInterpreter::FindCommandsForApropos(
llvm::StringRef search_word, StringList &commands_found,
StringList &commands_help, CommandObject::CommandMap &command_map) {
CommandObject::CommandMap::const_iterator pos;
for (pos = command_map.begin(); pos != command_map.end(); ++pos) {
llvm::StringRef command_name = pos->first;
CommandObject *cmd_obj = pos->second.get();
const bool search_short_help = true;
const bool search_long_help = false;
const bool search_syntax = false;
const bool search_options = false;
if (command_name.contains_lower(search_word) ||
cmd_obj->HelpTextContainsWord(search_word, search_short_help,
search_long_help, search_syntax,
search_options)) {
commands_found.AppendString(cmd_obj->GetCommandName());
commands_help.AppendString(cmd_obj->GetHelp());
}
if (cmd_obj->IsMultiwordObject()) {
CommandObjectMultiword *cmd_multiword = cmd_obj->GetAsMultiwordCommand();
FindCommandsForApropos(search_word, commands_found, commands_help,
cmd_multiword->GetSubcommandDictionary());
}
}
}
void CommandInterpreter::FindCommandsForApropos(llvm::StringRef search_word,
StringList &commands_found,
StringList &commands_help,
bool search_builtin_commands,
bool search_user_commands,
bool search_alias_commands) {
CommandObject::CommandMap::const_iterator pos;
if (search_builtin_commands)
FindCommandsForApropos(search_word, commands_found, commands_help,
m_command_dict);
if (search_user_commands)
FindCommandsForApropos(search_word, commands_found, commands_help,
m_user_dict);
if (search_alias_commands)
FindCommandsForApropos(search_word, commands_found, commands_help,
m_alias_dict);
}
void CommandInterpreter::UpdateExecutionContext(
ExecutionContext *override_context) {
if (override_context != nullptr) {
m_exe_ctx_ref = *override_context;
} else {
const bool adopt_selected = true;
m_exe_ctx_ref.SetTargetPtr(m_debugger.GetSelectedTarget().get(),
adopt_selected);
}
}
size_t CommandInterpreter::GetProcessOutput() {
// The process has stuff waiting for stderr; get it and write it out to the
// appropriate place.
char stdio_buffer[1024];
size_t len;
size_t total_bytes = 0;
Status error;
TargetSP target_sp(m_debugger.GetTargetList().GetSelectedTarget());
if (target_sp) {
ProcessSP process_sp(target_sp->GetProcessSP());
if (process_sp) {
while ((len = process_sp->GetSTDOUT(stdio_buffer, sizeof(stdio_buffer),
error)) > 0) {
size_t bytes_written = len;
m_debugger.GetOutputFile()->Write(stdio_buffer, bytes_written);
total_bytes += len;
}
while ((len = process_sp->GetSTDERR(stdio_buffer, sizeof(stdio_buffer),
error)) > 0) {
size_t bytes_written = len;
m_debugger.GetErrorFile()->Write(stdio_buffer, bytes_written);
total_bytes += len;
}
}
}
return total_bytes;
}
void CommandInterpreter::StartHandlingCommand() {
auto idle_state = CommandHandlingState::eIdle;
if (m_command_state.compare_exchange_strong(
idle_state, CommandHandlingState::eInProgress))
lldbassert(m_iohandler_nesting_level == 0);
else
lldbassert(m_iohandler_nesting_level > 0);
++m_iohandler_nesting_level;
}
void CommandInterpreter::FinishHandlingCommand() {
lldbassert(m_iohandler_nesting_level > 0);
if (--m_iohandler_nesting_level == 0) {
auto prev_state = m_command_state.exchange(CommandHandlingState::eIdle);
lldbassert(prev_state != CommandHandlingState::eIdle);
}
}
bool CommandInterpreter::InterruptCommand() {
auto in_progress = CommandHandlingState::eInProgress;
return m_command_state.compare_exchange_strong(
in_progress, CommandHandlingState::eInterrupted);
}
bool CommandInterpreter::WasInterrupted() const {
bool was_interrupted =
(m_command_state == CommandHandlingState::eInterrupted);
lldbassert(!was_interrupted || m_iohandler_nesting_level > 0);
return was_interrupted;
}
void CommandInterpreter::PrintCommandOutput(Stream &stream,
llvm::StringRef str) {
// Split the output into lines and poll for interrupt requests
const char *data = str.data();
size_t size = str.size();
while (size > 0 && !WasInterrupted()) {
size_t chunk_size = 0;
for (; chunk_size < size; ++chunk_size) {
lldbassert(data[chunk_size] != '\0');
if (data[chunk_size] == '\n') {
++chunk_size;
break;
}
}
chunk_size = stream.Write(data, chunk_size);
lldbassert(size >= chunk_size);
data += chunk_size;
size -= chunk_size;
}
if (size > 0) {
stream.Printf("\n... Interrupted.\n");
}
}
bool CommandInterpreter::EchoCommandNonInteractive(
llvm::StringRef line, const Flags &io_handler_flags) const {
if (!io_handler_flags.Test(eHandleCommandFlagEchoCommand))
return false;
llvm::StringRef command = line.trim();
if (command.empty())
return true;
if (command.front() == m_comment_char)
return io_handler_flags.Test(eHandleCommandFlagEchoCommentCommand);
return true;
}
void CommandInterpreter::IOHandlerInputComplete(IOHandler &io_handler,
std::string &line) {
// If we were interrupted, bail out...
if (WasInterrupted())
return;
const bool is_interactive = io_handler.GetIsInteractive();
if (!is_interactive) {
// When we are not interactive, don't execute blank lines. This will happen
// sourcing a commands file. We don't want blank lines to repeat the
// previous command and cause any errors to occur (like redefining an
// alias, get an error and stop parsing the commands file).
if (line.empty())
return;
// When using a non-interactive file handle (like when sourcing commands
// from a file) we need to echo the command out so we don't just see the
// command output and no command...
if (EchoCommandNonInteractive(line, io_handler.GetFlags()))
io_handler.GetOutputStreamFile()->Printf("%s%s\n", io_handler.GetPrompt(),
line.c_str());
}
StartHandlingCommand();
lldb_private::CommandReturnObject result;
HandleCommand(line.c_str(), eLazyBoolCalculate, result);
// Now emit the command output text from the command we just executed
if (io_handler.GetFlags().Test(eHandleCommandFlagPrintResult)) {
// Display any STDOUT/STDERR _prior_ to emitting the command result text
GetProcessOutput();
if (!result.GetImmediateOutputStream()) {
llvm::StringRef output = result.GetOutputData();
PrintCommandOutput(*io_handler.GetOutputStreamFile(), output);
}
// Now emit the command error text from the command we just executed
if (!result.GetImmediateErrorStream()) {
llvm::StringRef error = result.GetErrorData();
PrintCommandOutput(*io_handler.GetErrorStreamFile(), error);
}
}
FinishHandlingCommand();
switch (result.GetStatus()) {
case eReturnStatusInvalid:
case eReturnStatusSuccessFinishNoResult:
case eReturnStatusSuccessFinishResult:
case eReturnStatusStarted:
break;
case eReturnStatusSuccessContinuingNoResult:
case eReturnStatusSuccessContinuingResult:
if (io_handler.GetFlags().Test(eHandleCommandFlagStopOnContinue))
io_handler.SetIsDone(true);
break;
case eReturnStatusFailed:
m_num_errors++;
if (io_handler.GetFlags().Test(eHandleCommandFlagStopOnError))
io_handler.SetIsDone(true);
break;
case eReturnStatusQuit:
m_quit_requested = true;
io_handler.SetIsDone(true);
break;
}
// Finally, if we're going to stop on crash, check that here:
if (!m_quit_requested && result.GetDidChangeProcessState() &&
io_handler.GetFlags().Test(eHandleCommandFlagStopOnCrash)) {
bool should_stop = false;
TargetSP target_sp(m_debugger.GetTargetList().GetSelectedTarget());
if (target_sp) {
ProcessSP process_sp(target_sp->GetProcessSP());
if (process_sp) {
for (ThreadSP thread_sp : process_sp->GetThreadList().Threads()) {
StopReason reason = thread_sp->GetStopReason();
if ((reason == eStopReasonSignal || reason == eStopReasonException ||
reason == eStopReasonInstrumentation) &&
!result.GetAbnormalStopWasExpected()) {
should_stop = true;
break;
}
}
}
}
if (should_stop) {
io_handler.SetIsDone(true);
m_stopped_for_crash = true;
}
}
}
bool CommandInterpreter::IOHandlerInterrupt(IOHandler &io_handler) {
ExecutionContext exe_ctx(GetExecutionContext());
Process *process = exe_ctx.GetProcessPtr();
if (InterruptCommand())
return true;
if (process) {
StateType state = process->GetState();
if (StateIsRunningState(state)) {
process->Halt();
return true; // Don't do any updating when we are running
}
}
ScriptInterpreter *script_interpreter = GetScriptInterpreter(false);
if (script_interpreter) {
if (script_interpreter->Interrupt())
return true;
}
return false;
}
void CommandInterpreter::GetLLDBCommandsFromIOHandler(
const char *prompt, IOHandlerDelegate &delegate, bool asynchronously,
void *baton) {
Debugger &debugger = GetDebugger();
IOHandlerSP io_handler_sp(
new IOHandlerEditline(debugger, IOHandler::Type::CommandList,
"lldb", // Name of input reader for history
llvm::StringRef::withNullAsEmpty(prompt), // Prompt
llvm::StringRef(), // Continuation prompt
true, // Get multiple lines
debugger.GetUseColor(),
0, // Don't show line numbers
delegate)); // IOHandlerDelegate
if (io_handler_sp) {
io_handler_sp->SetUserData(baton);
if (asynchronously)
debugger.PushIOHandler(io_handler_sp);
else
debugger.RunIOHandler(io_handler_sp);
}
}
void CommandInterpreter::GetPythonCommandsFromIOHandler(
const char *prompt, IOHandlerDelegate &delegate, bool asynchronously,
void *baton) {
Debugger &debugger = GetDebugger();
IOHandlerSP io_handler_sp(
new IOHandlerEditline(debugger, IOHandler::Type::PythonCode,
"lldb-python", // Name of input reader for history
llvm::StringRef::withNullAsEmpty(prompt), // Prompt
llvm::StringRef(), // Continuation prompt
true, // Get multiple lines
debugger.GetUseColor(),
0, // Don't show line numbers
delegate)); // IOHandlerDelegate
if (io_handler_sp) {
io_handler_sp->SetUserData(baton);
if (asynchronously)
debugger.PushIOHandler(io_handler_sp);
else
debugger.RunIOHandler(io_handler_sp);
}
}
bool CommandInterpreter::IsActive() {
return m_debugger.IsTopIOHandler(m_command_io_handler_sp);
}
lldb::IOHandlerSP
CommandInterpreter::GetIOHandler(bool force_create,
CommandInterpreterRunOptions *options) {
// Always re-create the IOHandlerEditline in case the input changed. The old
// instance might have had a non-interactive input and now it does or vice
// versa.
if (force_create || !m_command_io_handler_sp) {
// Always re-create the IOHandlerEditline in case the input changed. The
// old instance might have had a non-interactive input and now it does or
// vice versa.
uint32_t flags = 0;
if (options) {
if (options->m_stop_on_continue == eLazyBoolYes)
flags |= eHandleCommandFlagStopOnContinue;
if (options->m_stop_on_error == eLazyBoolYes)
flags |= eHandleCommandFlagStopOnError;
if (options->m_stop_on_crash == eLazyBoolYes)
flags |= eHandleCommandFlagStopOnCrash;
if (options->m_echo_commands != eLazyBoolNo)
flags |= eHandleCommandFlagEchoCommand;
if (options->m_echo_comment_commands != eLazyBoolNo)
flags |= eHandleCommandFlagEchoCommentCommand;
if (options->m_print_results != eLazyBoolNo)
flags |= eHandleCommandFlagPrintResult;
} else {
flags = eHandleCommandFlagEchoCommand | eHandleCommandFlagPrintResult;
}
m_command_io_handler_sp.reset(new IOHandlerEditline(
m_debugger, IOHandler::Type::CommandInterpreter,
m_debugger.GetInputFile(), m_debugger.GetOutputFile(),
m_debugger.GetErrorFile(), flags, "lldb", m_debugger.GetPrompt(),
llvm::StringRef(), // Continuation prompt
false, // Don't enable multiple line input, just single line commands
m_debugger.GetUseColor(),
0, // Don't show line numbers
*this));
}
return m_command_io_handler_sp;
}
void CommandInterpreter::RunCommandInterpreter(
bool auto_handle_events, bool spawn_thread,
CommandInterpreterRunOptions &options) {
// Always re-create the command interpreter when we run it in case any file
// handles have changed.
bool force_create = true;
m_debugger.PushIOHandler(GetIOHandler(force_create, &options));
m_stopped_for_crash = false;
if (auto_handle_events)
m_debugger.StartEventHandlerThread();
if (spawn_thread) {
m_debugger.StartIOHandlerThread();
} else {
m_debugger.ExecuteIOHandlers();
if (auto_handle_events)
m_debugger.StopEventHandlerThread();
}
}
CommandObject *
CommandInterpreter::ResolveCommandImpl(std::string &command_line,
CommandReturnObject &result) {
std::string scratch_command(command_line); // working copy so we don't modify
// command_line unless we succeed
CommandObject *cmd_obj = nullptr;
StreamString revised_command_line;
bool wants_raw_input = false;
size_t actual_cmd_name_len = 0;
std::string next_word;
StringList matches;
bool done = false;
while (!done) {
char quote_char = '\0';
std::string suffix;
ExtractCommand(scratch_command, next_word, suffix, quote_char);
if (cmd_obj == nullptr) {
std::string full_name;
bool is_alias = GetAliasFullName(next_word, full_name);
cmd_obj = GetCommandObject(next_word, &matches);
bool is_real_command =
(!is_alias) || (cmd_obj != nullptr && !cmd_obj->IsAlias());
if (!is_real_command) {
matches.Clear();
std::string alias_result;
cmd_obj =
BuildAliasResult(full_name, scratch_command, alias_result, result);
revised_command_line.Printf("%s", alias_result.c_str());
if (cmd_obj) {
wants_raw_input = cmd_obj->WantsRawCommandString();
actual_cmd_name_len = cmd_obj->GetCommandName().size();
}
} else {
if (cmd_obj) {
llvm::StringRef cmd_name = cmd_obj->GetCommandName();
actual_cmd_name_len += cmd_name.size();
revised_command_line.Printf("%s", cmd_name.str().c_str());
wants_raw_input = cmd_obj->WantsRawCommandString();
} else {
revised_command_line.Printf("%s", next_word.c_str());
}
}
} else {
if (cmd_obj->IsMultiwordObject()) {
CommandObject *sub_cmd_obj =
cmd_obj->GetSubcommandObject(next_word.c_str());
if (sub_cmd_obj) {
// The subcommand's name includes the parent command's name, so
// restart rather than append to the revised_command_line.
llvm::StringRef sub_cmd_name = sub_cmd_obj->GetCommandName();
actual_cmd_name_len = sub_cmd_name.size() + 1;
revised_command_line.Clear();
revised_command_line.Printf("%s", sub_cmd_name.str().c_str());
cmd_obj = sub_cmd_obj;
wants_raw_input = cmd_obj->WantsRawCommandString();
} else {
if (quote_char)
revised_command_line.Printf(" %c%s%s%c", quote_char,
next_word.c_str(), suffix.c_str(),
quote_char);
else
revised_command_line.Printf(" %s%s", next_word.c_str(),
suffix.c_str());
done = true;
}
} else {
if (quote_char)
revised_command_line.Printf(" %c%s%s%c", quote_char,
next_word.c_str(), suffix.c_str(),
quote_char);
else
revised_command_line.Printf(" %s%s", next_word.c_str(),
suffix.c_str());
done = true;
}
}
if (cmd_obj == nullptr) {
const size_t num_matches = matches.GetSize();
if (matches.GetSize() > 1) {
StreamString error_msg;
error_msg.Printf("Ambiguous command '%s'. Possible matches:\n",
next_word.c_str());
for (uint32_t i = 0; i < num_matches; ++i) {
error_msg.Printf("\t%s\n", matches.GetStringAtIndex(i));
}
result.AppendRawError(error_msg.GetString());
} else {
// We didn't have only one match, otherwise we wouldn't get here.
lldbassert(num_matches == 0);
result.AppendErrorWithFormat("'%s' is not a valid command.\n",
next_word.c_str());
}
result.SetStatus(eReturnStatusFailed);
return nullptr;
}
if (cmd_obj->IsMultiwordObject()) {
if (!suffix.empty()) {
result.AppendErrorWithFormat(
"command '%s' did not recognize '%s%s%s' as valid (subcommand "
"might be invalid).\n",
cmd_obj->GetCommandName().str().c_str(),
next_word.empty() ? "" : next_word.c_str(),
next_word.empty() ? " -- " : " ", suffix.c_str());
result.SetStatus(eReturnStatusFailed);
return nullptr;
}
} else {
// If we found a normal command, we are done
done = true;
if (!suffix.empty()) {
switch (suffix[0]) {
case '/':
// GDB format suffixes
{
Options *command_options = cmd_obj->GetOptions();
if (command_options &&
command_options->SupportsLongOption("gdb-format")) {
std::string gdb_format_option("--gdb-format=");
gdb_format_option += (suffix.c_str() + 1);
std::string cmd = revised_command_line.GetString();
size_t arg_terminator_idx = FindArgumentTerminator(cmd);
if (arg_terminator_idx != std::string::npos) {
// Insert the gdb format option before the "--" that terminates
// options
gdb_format_option.append(1, ' ');
cmd.insert(arg_terminator_idx, gdb_format_option);
revised_command_line.Clear();
revised_command_line.PutCString(cmd);
} else
revised_command_line.Printf(" %s", gdb_format_option.c_str());
if (wants_raw_input &&
FindArgumentTerminator(cmd) == std::string::npos)
revised_command_line.PutCString(" --");
} else {
result.AppendErrorWithFormat(
"the '%s' command doesn't support the --gdb-format option\n",
cmd_obj->GetCommandName().str().c_str());
result.SetStatus(eReturnStatusFailed);
return nullptr;
}
}
break;
default:
result.AppendErrorWithFormat(
"unknown command shorthand suffix: '%s'\n", suffix.c_str());
result.SetStatus(eReturnStatusFailed);
return nullptr;
}
}
}
if (scratch_command.empty())
done = true;
}
if (!scratch_command.empty())
revised_command_line.Printf(" %s", scratch_command.c_str());
if (cmd_obj != NULL)
command_line = revised_command_line.GetString();
return cmd_obj;
}
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