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CommandObjectTarget.cpp
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CommandObjectTarget.cpp
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//===-- CommandObjectTarget.cpp -------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "CommandObjectTarget.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/IOHandler.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/Section.h"
#include "lldb/Core/ValueObjectVariable.h"
#include "lldb/DataFormatters/ValueObjectPrinter.h"
#include "lldb/Host/OptionParser.h"
#include "lldb/Host/StringConvert.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Interpreter/OptionArgParser.h"
#include "lldb/Interpreter/OptionGroupArchitecture.h"
#include "lldb/Interpreter/OptionGroupBoolean.h"
#include "lldb/Interpreter/OptionGroupFile.h"
#include "lldb/Interpreter/OptionGroupFormat.h"
#include "lldb/Interpreter/OptionGroupString.h"
#include "lldb/Interpreter/OptionGroupUInt64.h"
#include "lldb/Interpreter/OptionGroupUUID.h"
#include "lldb/Interpreter/OptionGroupValueObjectDisplay.h"
#include "lldb/Interpreter/OptionGroupVariable.h"
#include "lldb/Interpreter/Options.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/FuncUnwinders.h"
#include "lldb/Symbol/LineTable.h"
#include "lldb/Symbol/LocateSymbolFile.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/UnwindPlan.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadSpec.h"
#include "lldb/Utility/Args.h"
#include "lldb/Utility/State.h"
#include "lldb/Utility/Timer.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormatAdapters.h"
using namespace lldb;
using namespace lldb_private;
static void DumpTargetInfo(uint32_t target_idx, Target *target,
const char *prefix_cstr,
bool show_stopped_process_status, Stream &strm) {
const ArchSpec &target_arch = target->GetArchitecture();
Module *exe_module = target->GetExecutableModulePointer();
char exe_path[PATH_MAX];
bool exe_valid = false;
if (exe_module)
exe_valid = exe_module->GetFileSpec().GetPath(exe_path, sizeof(exe_path));
if (!exe_valid)
::strcpy(exe_path, "<none>");
strm.Printf("%starget #%u: %s", prefix_cstr ? prefix_cstr : "", target_idx,
exe_path);
uint32_t properties = 0;
if (target_arch.IsValid()) {
strm.Printf("%sarch=", properties++ > 0 ? ", " : " ( ");
target_arch.DumpTriple(strm.AsRawOstream());
properties++;
}
PlatformSP platform_sp(target->GetPlatform());
if (platform_sp)
strm.Printf("%splatform=%s", properties++ > 0 ? ", " : " ( ",
platform_sp->GetName().GetCString());
ProcessSP process_sp(target->GetProcessSP());
bool show_process_status = false;
if (process_sp) {
lldb::pid_t pid = process_sp->GetID();
StateType state = process_sp->GetState();
if (show_stopped_process_status)
show_process_status = StateIsStoppedState(state, true);
const char *state_cstr = StateAsCString(state);
if (pid != LLDB_INVALID_PROCESS_ID)
strm.Printf("%spid=%" PRIu64, properties++ > 0 ? ", " : " ( ", pid);
strm.Printf("%sstate=%s", properties++ > 0 ? ", " : " ( ", state_cstr);
}
if (properties > 0)
strm.PutCString(" )\n");
else
strm.EOL();
if (show_process_status) {
const bool only_threads_with_stop_reason = true;
const uint32_t start_frame = 0;
const uint32_t num_frames = 1;
const uint32_t num_frames_with_source = 1;
const bool stop_format = false;
process_sp->GetStatus(strm);
process_sp->GetThreadStatus(strm, only_threads_with_stop_reason,
start_frame, num_frames, num_frames_with_source,
stop_format);
}
}
static uint32_t DumpTargetList(TargetList &target_list,
bool show_stopped_process_status, Stream &strm) {
const uint32_t num_targets = target_list.GetNumTargets();
if (num_targets) {
TargetSP selected_target_sp(target_list.GetSelectedTarget());
strm.PutCString("Current targets:\n");
for (uint32_t i = 0; i < num_targets; ++i) {
TargetSP target_sp(target_list.GetTargetAtIndex(i));
if (target_sp) {
bool is_selected = target_sp.get() == selected_target_sp.get();
DumpTargetInfo(i, target_sp.get(), is_selected ? "* " : " ",
show_stopped_process_status, strm);
}
}
}
return num_targets;
}
// Note that the negation in the argument name causes a slightly confusing
// mapping of the enum values.
static constexpr OptionEnumValueElement g_dependents_enumaration[] = {
{
eLoadDependentsDefault,
"default",
"Only load dependents when the target is an executable.",
},
{
eLoadDependentsNo,
"true",
"Don't load dependents, even if the target is an executable.",
},
{
eLoadDependentsYes,
"false",
"Load dependents, even if the target is not an executable.",
},
};
#define LLDB_OPTIONS_target_dependents
#include "CommandOptions.inc"
class OptionGroupDependents : public OptionGroup {
public:
OptionGroupDependents() {}
~OptionGroupDependents() override {}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_target_dependents_options);
}
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_value,
ExecutionContext *execution_context) override {
Status error;
// For compatibility no value means don't load dependents.
if (option_value.empty()) {
m_load_dependent_files = eLoadDependentsNo;
return error;
}
const char short_option =
g_target_dependents_options[option_idx].short_option;
if (short_option == 'd') {
LoadDependentFiles tmp_load_dependents;
tmp_load_dependents = (LoadDependentFiles)OptionArgParser::ToOptionEnum(
option_value, g_target_dependents_options[option_idx].enum_values, 0,
error);
if (error.Success())
m_load_dependent_files = tmp_load_dependents;
} else {
error.SetErrorStringWithFormat("unrecognized short option '%c'",
short_option);
}
return error;
}
Status SetOptionValue(uint32_t, const char *, ExecutionContext *) = delete;
void OptionParsingStarting(ExecutionContext *execution_context) override {
m_load_dependent_files = eLoadDependentsDefault;
}
LoadDependentFiles m_load_dependent_files;
private:
DISALLOW_COPY_AND_ASSIGN(OptionGroupDependents);
};
#pragma mark CommandObjectTargetCreate
// "target create"
class CommandObjectTargetCreate : public CommandObjectParsed {
public:
CommandObjectTargetCreate(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "target create",
"Create a target using the argument as the main executable.",
nullptr),
m_option_group(), m_arch_option(),
m_core_file(LLDB_OPT_SET_1, false, "core", 'c', 0, eArgTypeFilename,
"Fullpath to a core file to use for this target."),
m_platform_path(LLDB_OPT_SET_1, false, "platform-path", 'P', 0,
eArgTypePath,
"Path to the remote file to use for this target."),
m_symbol_file(LLDB_OPT_SET_1, false, "symfile", 's', 0,
eArgTypeFilename,
"Fullpath to a stand alone debug "
"symbols file for when debug symbols "
"are not in the executable."),
m_remote_file(
LLDB_OPT_SET_1, false, "remote-file", 'r', 0, eArgTypeFilename,
"Fullpath to the file on the remote host if debugging remotely."),
m_add_dependents() {
CommandArgumentEntry arg;
CommandArgumentData file_arg;
// Define the first (and only) variant of this arg.
file_arg.arg_type = eArgTypeFilename;
file_arg.arg_repetition = eArgRepeatPlain;
// There is only one variant this argument could be; put it into the
// argument entry.
arg.push_back(file_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
m_option_group.Append(&m_arch_option, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Append(&m_core_file, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Append(&m_platform_path, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Append(&m_symbol_file, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Append(&m_remote_file, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Append(&m_add_dependents, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Finalize();
}
~CommandObjectTargetCreate() override = default;
Options *GetOptions() override { return &m_option_group; }
void
HandleArgumentCompletion(CompletionRequest &request,
OptionElementVector &opt_element_vector) override {
CommandCompletions::InvokeCommonCompletionCallbacks(
GetCommandInterpreter(), CommandCompletions::eDiskFileCompletion,
request, nullptr);
}
protected:
bool DoExecute(Args &command, CommandReturnObject &result) override {
const size_t argc = command.GetArgumentCount();
FileSpec core_file(m_core_file.GetOptionValue().GetCurrentValue());
FileSpec remote_file(m_remote_file.GetOptionValue().GetCurrentValue());
if (core_file) {
if (!FileSystem::Instance().Exists(core_file)) {
result.AppendErrorWithFormat("core file '%s' doesn't exist",
core_file.GetPath().c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
if (!FileSystem::Instance().Readable(core_file)) {
result.AppendErrorWithFormat("core file '%s' is not readable",
core_file.GetPath().c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
}
if (argc == 1 || core_file || remote_file) {
FileSpec symfile(m_symbol_file.GetOptionValue().GetCurrentValue());
if (symfile) {
if (FileSystem::Instance().Exists(symfile)) {
if (!FileSystem::Instance().Readable(symfile)) {
result.AppendErrorWithFormat("symbol file '%s' is not readable",
symfile.GetPath().c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
} else {
char symfile_path[PATH_MAX];
symfile.GetPath(symfile_path, sizeof(symfile_path));
result.AppendErrorWithFormat("invalid symbol file path '%s'",
symfile_path);
result.SetStatus(eReturnStatusFailed);
return false;
}
}
const char *file_path = command.GetArgumentAtIndex(0);
static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
Timer scoped_timer(func_cat, "(lldb) target create '%s'", file_path);
FileSpec file_spec;
if (file_path) {
file_spec.SetFile(file_path, FileSpec::Style::native);
FileSystem::Instance().Resolve(file_spec);
}
bool must_set_platform_path = false;
Debugger &debugger = GetDebugger();
TargetSP target_sp;
llvm::StringRef arch_cstr = m_arch_option.GetArchitectureName();
Status error(debugger.GetTargetList().CreateTarget(
debugger, file_path, arch_cstr,
m_add_dependents.m_load_dependent_files, nullptr, target_sp));
if (target_sp) {
// Only get the platform after we create the target because we might
// have switched platforms depending on what the arguments were to
// CreateTarget() we can't rely on the selected platform.
PlatformSP platform_sp = target_sp->GetPlatform();
if (remote_file) {
if (platform_sp) {
// I have a remote file.. two possible cases
if (file_spec && FileSystem::Instance().Exists(file_spec)) {
// if the remote file does not exist, push it there
if (!platform_sp->GetFileExists(remote_file)) {
Status err = platform_sp->PutFile(file_spec, remote_file);
if (err.Fail()) {
result.AppendError(err.AsCString());
result.SetStatus(eReturnStatusFailed);
return false;
}
}
} else {
// there is no local file and we need one
// in order to make the remote ---> local transfer we need a
// platform
// TODO: if the user has passed in a --platform argument, use it
// to fetch the right platform
if (!platform_sp) {
result.AppendError(
"unable to perform remote debugging without a platform");
result.SetStatus(eReturnStatusFailed);
return false;
}
if (file_path) {
// copy the remote file to the local file
Status err = platform_sp->GetFile(remote_file, file_spec);
if (err.Fail()) {
result.AppendError(err.AsCString());
result.SetStatus(eReturnStatusFailed);
return false;
}
} else {
// make up a local file
result.AppendError("remote --> local transfer without local "
"path is not implemented yet");
result.SetStatus(eReturnStatusFailed);
return false;
}
}
} else {
result.AppendError("no platform found for target");
result.SetStatus(eReturnStatusFailed);
return false;
}
}
if (symfile || remote_file) {
ModuleSP module_sp(target_sp->GetExecutableModule());
if (module_sp) {
if (symfile)
module_sp->SetSymbolFileFileSpec(symfile);
if (remote_file) {
std::string remote_path = remote_file.GetPath();
target_sp->SetArg0(remote_path.c_str());
module_sp->SetPlatformFileSpec(remote_file);
}
}
}
debugger.GetTargetList().SetSelectedTarget(target_sp.get());
if (must_set_platform_path) {
ModuleSpec main_module_spec(file_spec);
ModuleSP module_sp =
target_sp->GetOrCreateModule(main_module_spec, true /* notify */);
if (module_sp)
module_sp->SetPlatformFileSpec(remote_file);
}
if (core_file) {
char core_path[PATH_MAX];
core_file.GetPath(core_path, sizeof(core_path));
if (FileSystem::Instance().Exists(core_file)) {
if (!FileSystem::Instance().Readable(core_file)) {
result.AppendMessageWithFormat(
"Core file '%s' is not readable.\n", core_path);
result.SetStatus(eReturnStatusFailed);
return false;
}
FileSpec core_file_dir;
core_file_dir.GetDirectory() = core_file.GetDirectory();
target_sp->AppendExecutableSearchPaths(core_file_dir);
ProcessSP process_sp(target_sp->CreateProcess(
GetDebugger().GetListener(), llvm::StringRef(), &core_file));
if (process_sp) {
// Seems weird that we Launch a core file, but that is what we
// do!
error = process_sp->LoadCore();
if (error.Fail()) {
result.AppendError(
error.AsCString("can't find plug-in for core file"));
result.SetStatus(eReturnStatusFailed);
return false;
} else {
result.AppendMessageWithFormat(
"Core file '%s' (%s) was loaded.\n", core_path,
target_sp->GetArchitecture().GetArchitectureName());
result.SetStatus(eReturnStatusSuccessFinishNoResult);
}
} else {
result.AppendErrorWithFormat(
"Unable to find process plug-in for core file '%s'\n",
core_path);
result.SetStatus(eReturnStatusFailed);
}
} else {
result.AppendErrorWithFormat("Core file '%s' does not exist\n",
core_path);
result.SetStatus(eReturnStatusFailed);
}
} else {
result.AppendMessageWithFormat(
"Current executable set to '%s' (%s).\n",
file_spec.GetPath().c_str(),
target_sp->GetArchitecture().GetArchitectureName());
result.SetStatus(eReturnStatusSuccessFinishNoResult);
}
} else {
result.AppendError(error.AsCString());
result.SetStatus(eReturnStatusFailed);
}
} else {
result.AppendErrorWithFormat("'%s' takes exactly one executable path "
"argument, or use the --core option.\n",
m_cmd_name.c_str());
result.SetStatus(eReturnStatusFailed);
}
return result.Succeeded();
}
private:
OptionGroupOptions m_option_group;
OptionGroupArchitecture m_arch_option;
OptionGroupFile m_core_file;
OptionGroupFile m_platform_path;
OptionGroupFile m_symbol_file;
OptionGroupFile m_remote_file;
OptionGroupDependents m_add_dependents;
};
#pragma mark CommandObjectTargetList
// "target list"
class CommandObjectTargetList : public CommandObjectParsed {
public:
CommandObjectTargetList(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "target list",
"List all current targets in the current debug session.", nullptr) {
}
~CommandObjectTargetList() override = default;
protected:
bool DoExecute(Args &args, CommandReturnObject &result) override {
if (args.GetArgumentCount() == 0) {
Stream &strm = result.GetOutputStream();
bool show_stopped_process_status = false;
if (DumpTargetList(GetDebugger().GetTargetList(),
show_stopped_process_status, strm) == 0) {
strm.PutCString("No targets.\n");
}
result.SetStatus(eReturnStatusSuccessFinishResult);
} else {
result.AppendError("the 'target list' command takes no arguments\n");
result.SetStatus(eReturnStatusFailed);
}
return result.Succeeded();
}
};
#pragma mark CommandObjectTargetSelect
// "target select"
class CommandObjectTargetSelect : public CommandObjectParsed {
public:
CommandObjectTargetSelect(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "target select",
"Select a target as the current target by target index.", nullptr) {
}
~CommandObjectTargetSelect() override = default;
protected:
bool DoExecute(Args &args, CommandReturnObject &result) override {
if (args.GetArgumentCount() == 1) {
bool success = false;
const char *target_idx_arg = args.GetArgumentAtIndex(0);
uint32_t target_idx =
StringConvert::ToUInt32(target_idx_arg, UINT32_MAX, 0, &success);
if (success) {
TargetList &target_list = GetDebugger().GetTargetList();
const uint32_t num_targets = target_list.GetNumTargets();
if (target_idx < num_targets) {
TargetSP target_sp(target_list.GetTargetAtIndex(target_idx));
if (target_sp) {
Stream &strm = result.GetOutputStream();
target_list.SetSelectedTarget(target_sp.get());
bool show_stopped_process_status = false;
DumpTargetList(target_list, show_stopped_process_status, strm);
result.SetStatus(eReturnStatusSuccessFinishResult);
} else {
result.AppendErrorWithFormat("target #%u is NULL in target list\n",
target_idx);
result.SetStatus(eReturnStatusFailed);
}
} else {
if (num_targets > 0) {
result.AppendErrorWithFormat(
"index %u is out of range, valid target indexes are 0 - %u\n",
target_idx, num_targets - 1);
} else {
result.AppendErrorWithFormat(
"index %u is out of range since there are no active targets\n",
target_idx);
}
result.SetStatus(eReturnStatusFailed);
}
} else {
result.AppendErrorWithFormat("invalid index string value '%s'\n",
target_idx_arg);
result.SetStatus(eReturnStatusFailed);
}
} else {
result.AppendError(
"'target select' takes a single argument: a target index\n");
result.SetStatus(eReturnStatusFailed);
}
return result.Succeeded();
}
};
#pragma mark CommandObjectTargetDelete
// "target delete"
class CommandObjectTargetDelete : public CommandObjectParsed {
public:
CommandObjectTargetDelete(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "target delete",
"Delete one or more targets by target index.",
nullptr),
m_option_group(), m_all_option(LLDB_OPT_SET_1, false, "all", 'a',
"Delete all targets.", false, true),
m_cleanup_option(
LLDB_OPT_SET_1, false, "clean", 'c',
"Perform extra cleanup to minimize memory consumption after "
"deleting the target. "
"By default, LLDB will keep in memory any modules previously "
"loaded by the target as well "
"as all of its debug info. Specifying --clean will unload all of "
"these shared modules and "
"cause them to be reparsed again the next time the target is run",
false, true) {
m_option_group.Append(&m_all_option, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Append(&m_cleanup_option, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Finalize();
}
~CommandObjectTargetDelete() override = default;
Options *GetOptions() override { return &m_option_group; }
protected:
bool DoExecute(Args &args, CommandReturnObject &result) override {
const size_t argc = args.GetArgumentCount();
std::vector<TargetSP> delete_target_list;
TargetList &target_list = GetDebugger().GetTargetList();
TargetSP target_sp;
if (m_all_option.GetOptionValue()) {
for (int i = 0; i < target_list.GetNumTargets(); ++i)
delete_target_list.push_back(target_list.GetTargetAtIndex(i));
} else if (argc > 0) {
const uint32_t num_targets = target_list.GetNumTargets();
// Bail out if don't have any targets.
if (num_targets == 0) {
result.AppendError("no targets to delete");
result.SetStatus(eReturnStatusFailed);
return false;
}
for (auto &entry : args.entries()) {
uint32_t target_idx;
if (entry.ref().getAsInteger(0, target_idx)) {
result.AppendErrorWithFormat("invalid target index '%s'\n",
entry.c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
if (target_idx < num_targets) {
target_sp = target_list.GetTargetAtIndex(target_idx);
if (target_sp) {
delete_target_list.push_back(target_sp);
continue;
}
}
if (num_targets > 1)
result.AppendErrorWithFormat("target index %u is out of range, valid "
"target indexes are 0 - %u\n",
target_idx, num_targets - 1);
else
result.AppendErrorWithFormat(
"target index %u is out of range, the only valid index is 0\n",
target_idx);
result.SetStatus(eReturnStatusFailed);
return false;
}
} else {
target_sp = target_list.GetSelectedTarget();
if (!target_sp) {
result.AppendErrorWithFormat("no target is currently selected\n");
result.SetStatus(eReturnStatusFailed);
return false;
}
delete_target_list.push_back(target_sp);
}
const size_t num_targets_to_delete = delete_target_list.size();
for (size_t idx = 0; idx < num_targets_to_delete; ++idx) {
target_sp = delete_target_list[idx];
target_list.DeleteTarget(target_sp);
target_sp->Destroy();
}
// If "--clean" was specified, prune any orphaned shared modules from the
// global shared module list
if (m_cleanup_option.GetOptionValue()) {
const bool mandatory = true;
ModuleList::RemoveOrphanSharedModules(mandatory);
}
result.GetOutputStream().Printf("%u targets deleted.\n",
(uint32_t)num_targets_to_delete);
result.SetStatus(eReturnStatusSuccessFinishResult);
return true;
}
OptionGroupOptions m_option_group;
OptionGroupBoolean m_all_option;
OptionGroupBoolean m_cleanup_option;
};
class CommandObjectTargetShowLaunchEnvironment : public CommandObjectParsed {
public:
CommandObjectTargetShowLaunchEnvironment(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "target show-launch-environment",
"Shows the environment being passed to the process when launched, "
"taking info account 3 settings: target.env-vars, "
"target.inherit-env and target.unset-env-vars.",
nullptr, eCommandRequiresTarget) {}
~CommandObjectTargetShowLaunchEnvironment() override = default;
protected:
bool DoExecute(Args &args, CommandReturnObject &result) override {
Target *target = m_exe_ctx.GetTargetPtr();
Environment env = target->GetEnvironment();
std::vector<Environment::value_type *> env_vector;
env_vector.reserve(env.size());
for (auto &KV : env)
env_vector.push_back(&KV);
std::sort(env_vector.begin(), env_vector.end(),
[](Environment::value_type *a, Environment::value_type *b) {
return a->first() < b->first();
});
auto &strm = result.GetOutputStream();
for (auto &KV : env_vector)
strm.Format("{0}={1}\n", KV->first(), KV->second);
result.SetStatus(eReturnStatusSuccessFinishResult);
return result.Succeeded();
}
};
#pragma mark CommandObjectTargetVariable
// "target variable"
class CommandObjectTargetVariable : public CommandObjectParsed {
static const uint32_t SHORT_OPTION_FILE = 0x66696c65; // 'file'
static const uint32_t SHORT_OPTION_SHLB = 0x73686c62; // 'shlb'
public:
CommandObjectTargetVariable(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "target variable",
"Read global variables for the current target, "
"before or while running a process.",
nullptr, eCommandRequiresTarget),
m_option_group(),
m_option_variable(false), // Don't include frame options
m_option_format(eFormatDefault),
m_option_compile_units(LLDB_OPT_SET_1, false, "file", SHORT_OPTION_FILE,
0, eArgTypeFilename,
"A basename or fullpath to a file that contains "
"global variables. This option can be "
"specified multiple times."),
m_option_shared_libraries(
LLDB_OPT_SET_1, false, "shlib", SHORT_OPTION_SHLB, 0,
eArgTypeFilename,
"A basename or fullpath to a shared library to use in the search "
"for global "
"variables. This option can be specified multiple times."),
m_varobj_options() {
CommandArgumentEntry arg;
CommandArgumentData var_name_arg;
// Define the first (and only) variant of this arg.
var_name_arg.arg_type = eArgTypeVarName;
var_name_arg.arg_repetition = eArgRepeatPlus;
// There is only one variant this argument could be; put it into the
// argument entry.
arg.push_back(var_name_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
m_option_group.Append(&m_varobj_options, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Append(&m_option_variable, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Append(&m_option_format,
OptionGroupFormat::OPTION_GROUP_FORMAT |
OptionGroupFormat::OPTION_GROUP_GDB_FMT,
LLDB_OPT_SET_1);
m_option_group.Append(&m_option_compile_units, LLDB_OPT_SET_ALL,
LLDB_OPT_SET_1);
m_option_group.Append(&m_option_shared_libraries, LLDB_OPT_SET_ALL,
LLDB_OPT_SET_1);
m_option_group.Finalize();
}
~CommandObjectTargetVariable() override = default;
void DumpValueObject(Stream &s, VariableSP &var_sp, ValueObjectSP &valobj_sp,
const char *root_name) {
DumpValueObjectOptions options(m_varobj_options.GetAsDumpOptions());
if (!valobj_sp->GetTargetSP()->GetDisplayRuntimeSupportValues() &&
valobj_sp->IsRuntimeSupportValue())
return;
switch (var_sp->GetScope()) {
case eValueTypeVariableGlobal:
if (m_option_variable.show_scope)
s.PutCString("GLOBAL: ");
break;
case eValueTypeVariableStatic:
if (m_option_variable.show_scope)
s.PutCString("STATIC: ");
break;
case eValueTypeVariableArgument:
if (m_option_variable.show_scope)
s.PutCString(" ARG: ");
break;
case eValueTypeVariableLocal:
if (m_option_variable.show_scope)
s.PutCString(" LOCAL: ");
break;
case eValueTypeVariableThreadLocal:
if (m_option_variable.show_scope)
s.PutCString("THREAD: ");
break;
default:
break;
}
if (m_option_variable.show_decl) {
bool show_fullpaths = false;
bool show_module = true;
if (var_sp->DumpDeclaration(&s, show_fullpaths, show_module))
s.PutCString(": ");
}
const Format format = m_option_format.GetFormat();
if (format != eFormatDefault)
options.SetFormat(format);
options.SetRootValueObjectName(root_name);
valobj_sp->Dump(s, options);
}
static size_t GetVariableCallback(void *baton, const char *name,
VariableList &variable_list) {
size_t old_size = variable_list.GetSize();
Target *target = static_cast<Target *>(baton);
if (target)
target->GetImages().FindGlobalVariables(ConstString(name), UINT32_MAX,
variable_list);
return variable_list.GetSize() - old_size;
}
Options *GetOptions() override { return &m_option_group; }
protected:
void DumpGlobalVariableList(const ExecutionContext &exe_ctx,
const SymbolContext &sc,
const VariableList &variable_list, Stream &s) {
if (variable_list.Empty())
return;
if (sc.module_sp) {
if (sc.comp_unit) {
s.Format("Global variables for {0} in {1}:\n",
sc.comp_unit->GetPrimaryFile(), sc.module_sp->GetFileSpec());
} else {
s.Printf("Global variables for %s\n",
sc.module_sp->GetFileSpec().GetPath().c_str());
}
} else if (sc.comp_unit) {
s.Format("Global variables for {0}\n", sc.comp_unit->GetPrimaryFile());
}
for (VariableSP var_sp : variable_list) {
if (!var_sp)
continue;
ValueObjectSP valobj_sp(ValueObjectVariable::Create(
exe_ctx.GetBestExecutionContextScope(), var_sp));
if (valobj_sp)
DumpValueObject(s, var_sp, valobj_sp, var_sp->GetName().GetCString());
}
}
bool DoExecute(Args &args, CommandReturnObject &result) override {
Target *target = m_exe_ctx.GetTargetPtr();
const size_t argc = args.GetArgumentCount();
Stream &s = result.GetOutputStream();
if (argc > 0) {
// TODO: Convert to entry-based iteration. Requires converting
// DumpValueObject.
for (size_t idx = 0; idx < argc; ++idx) {
VariableList variable_list;
ValueObjectList valobj_list;
const char *arg = args.GetArgumentAtIndex(idx);
size_t matches = 0;
bool use_var_name = false;
if (m_option_variable.use_regex) {
RegularExpression regex(llvm::StringRef::withNullAsEmpty(arg));
if (!regex.IsValid()) {
result.GetErrorStream().Printf(
"error: invalid regular expression: '%s'\n", arg);
result.SetStatus(eReturnStatusFailed);
return false;
}
use_var_name = true;
target->GetImages().FindGlobalVariables(regex, UINT32_MAX,
variable_list);
matches = variable_list.GetSize();
} else {
Status error(Variable::GetValuesForVariableExpressionPath(
arg, m_exe_ctx.GetBestExecutionContextScope(),
GetVariableCallback, target, variable_list, valobj_list));
matches = variable_list.GetSize();
}
if (matches == 0) {
result.GetErrorStream().Printf(
"error: can't find global variable '%s'\n", arg);
result.SetStatus(eReturnStatusFailed);
return false;
} else {
for (uint32_t global_idx = 0; global_idx < matches; ++global_idx) {
VariableSP var_sp(variable_list.GetVariableAtIndex(global_idx));
if (var_sp) {
ValueObjectSP valobj_sp(
valobj_list.GetValueObjectAtIndex(global_idx));
if (!valobj_sp)
valobj_sp = ValueObjectVariable::Create(
m_exe_ctx.GetBestExecutionContextScope(), var_sp);
if (valobj_sp)
DumpValueObject(s, var_sp, valobj_sp,
use_var_name ? var_sp->GetName().GetCString()
: arg);
}
}
}
}
} else {
const FileSpecList &compile_units =
m_option_compile_units.GetOptionValue().GetCurrentValue();
const FileSpecList &shlibs =
m_option_shared_libraries.GetOptionValue().GetCurrentValue();
SymbolContextList sc_list;
const size_t num_compile_units = compile_units.GetSize();
const size_t num_shlibs = shlibs.GetSize();
if (num_compile_units == 0 && num_shlibs == 0) {
bool success = false;
StackFrame *frame = m_exe_ctx.GetFramePtr();
CompileUnit *comp_unit = nullptr;
if (frame) {
SymbolContext sc = frame->GetSymbolContext(eSymbolContextCompUnit);
if (sc.comp_unit) {
const bool can_create = true;
VariableListSP comp_unit_varlist_sp(
sc.comp_unit->GetVariableList(can_create));
if (comp_unit_varlist_sp) {
size_t count = comp_unit_varlist_sp->GetSize();
if (count > 0) {
DumpGlobalVariableList(m_exe_ctx, sc, *comp_unit_varlist_sp, s);
success = true;
}
}
}
}
if (!success) {
if (frame) {
if (comp_unit)
result.AppendErrorWithFormatv(
"no global variables in current compile unit: {0}\n",
comp_unit->GetPrimaryFile());
else
result.AppendErrorWithFormat(
"no debug information for frame %u\n",
frame->GetFrameIndex());
} else
result.AppendError("'target variable' takes one or more global "
"variable names as arguments\n");
result.SetStatus(eReturnStatusFailed);
}
} else {
SymbolContextList sc_list;
// We have one or more compile unit or shlib
if (num_shlibs > 0) {
for (size_t shlib_idx = 0; shlib_idx < num_shlibs; ++shlib_idx) {
const FileSpec module_file(shlibs.GetFileSpecAtIndex(shlib_idx));
ModuleSpec module_spec(module_file);
ModuleSP module_sp(
target->GetImages().FindFirstModule(module_spec));
if (module_sp) {
if (num_compile_units > 0) {
for (size_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
module_sp->FindCompileUnits(
compile_units.GetFileSpecAtIndex(cu_idx), sc_list);
} else {
SymbolContext sc;
sc.module_sp = module_sp;
sc_list.Append(sc);
}
} else {
// Didn't find matching shlib/module in target...
result.AppendErrorWithFormat(
"target doesn't contain the specified shared library: %s\n",
module_file.GetPath().c_str());
}
}
} else {