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llvm-project/lldb/source/Target/Platform.cpp

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//===-- Platform.cpp --------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <algorithm>
#include <csignal>
#include <fstream>
#include <memory>
#include <vector>
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "lldb/Breakpoint/BreakpointIDList.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/OptionParser.h"
#include "lldb/Interpreter/OptionValueProperties.h"
#include "lldb/Interpreter/Property.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Target/ModuleCache.h"
#include "lldb/Target/Platform.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/UnixSignals.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/StructuredData.h"
#include "llvm/Support/FileSystem.h"
// Define these constants from POSIX mman.h rather than include the file so
// that they will be correct even when compiled on Linux.
#define MAP_PRIVATE 2
#define MAP_ANON 0x1000
using namespace lldb;
using namespace lldb_private;
static uint32_t g_initialize_count = 0;
// Use a singleton function for g_local_platform_sp to avoid init constructors
// since LLDB is often part of a shared library
static PlatformSP &GetHostPlatformSP() {
static PlatformSP g_platform_sp;
return g_platform_sp;
}
const char *Platform::GetHostPlatformName() { return "host"; }
namespace {
static constexpr PropertyDefinition g_properties[] = {
{"use-module-cache", OptionValue::eTypeBoolean, true, true, nullptr,
{}, "Use module cache."},
{"module-cache-directory", OptionValue::eTypeFileSpec, true, 0, nullptr,
{}, "Root directory for cached modules."}};
enum { ePropertyUseModuleCache, ePropertyModuleCacheDirectory };
} // namespace
ConstString PlatformProperties::GetSettingName() {
static ConstString g_setting_name("platform");
return g_setting_name;
}
PlatformProperties::PlatformProperties() {
m_collection_sp = std::make_shared<OptionValueProperties>(GetSettingName());
m_collection_sp->Initialize(g_properties);
auto module_cache_dir = GetModuleCacheDirectory();
if (module_cache_dir)
return;
llvm::SmallString<64> user_home_dir;
if (!llvm::sys::path::home_directory(user_home_dir))
return;
module_cache_dir = FileSpec(user_home_dir.c_str());
module_cache_dir.AppendPathComponent(".lldb");
module_cache_dir.AppendPathComponent("module_cache");
SetModuleCacheDirectory(module_cache_dir);
}
bool PlatformProperties::GetUseModuleCache() const {
const auto idx = ePropertyUseModuleCache;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_properties[idx].default_uint_value != 0);
}
bool PlatformProperties::SetUseModuleCache(bool use_module_cache) {
return m_collection_sp->SetPropertyAtIndexAsBoolean(
nullptr, ePropertyUseModuleCache, use_module_cache);
}
FileSpec PlatformProperties::GetModuleCacheDirectory() const {
return m_collection_sp->GetPropertyAtIndexAsFileSpec(
nullptr, ePropertyModuleCacheDirectory);
}
bool PlatformProperties::SetModuleCacheDirectory(const FileSpec &dir_spec) {
return m_collection_sp->SetPropertyAtIndexAsFileSpec(
nullptr, ePropertyModuleCacheDirectory, dir_spec);
}
/// Get the native host platform plug-in.
///
/// There should only be one of these for each host that LLDB runs
/// upon that should be statically compiled in and registered using
/// preprocessor macros or other similar build mechanisms.
///
/// This platform will be used as the default platform when launching
/// or attaching to processes unless another platform is specified.
PlatformSP Platform::GetHostPlatform() { return GetHostPlatformSP(); }
static std::vector<PlatformSP> &GetPlatformList() {
static std::vector<PlatformSP> g_platform_list;
return g_platform_list;
}
static std::recursive_mutex &GetPlatformListMutex() {
static std::recursive_mutex g_mutex;
return g_mutex;
}
void Platform::Initialize() { g_initialize_count++; }
void Platform::Terminate() {
if (g_initialize_count > 0) {
if (--g_initialize_count == 0) {
std::lock_guard<std::recursive_mutex> guard(GetPlatformListMutex());
GetPlatformList().clear();
}
}
}
const PlatformPropertiesSP &Platform::GetGlobalPlatformProperties() {
static const auto g_settings_sp(std::make_shared<PlatformProperties>());
return g_settings_sp;
}
void Platform::SetHostPlatform(const lldb::PlatformSP &platform_sp) {
// The native platform should use its static void Platform::Initialize()
// function to register itself as the native platform.
GetHostPlatformSP() = platform_sp;
if (platform_sp) {
std::lock_guard<std::recursive_mutex> guard(GetPlatformListMutex());
GetPlatformList().push_back(platform_sp);
}
}
Status Platform::GetFileWithUUID(const FileSpec &platform_file,
const UUID *uuid_ptr, FileSpec &local_file) {
// Default to the local case
local_file = platform_file;
return Status();
}
FileSpecList
Platform::LocateExecutableScriptingResources(Target *target, Module &module,
Stream *feedback_stream) {
return FileSpecList();
}
// PlatformSP
// Platform::FindPlugin (Process *process, ConstString plugin_name)
//{
// PlatformCreateInstance create_callback = nullptr;
// if (plugin_name)
// {
// create_callback =
// PluginManager::GetPlatformCreateCallbackForPluginName (plugin_name);
// if (create_callback)
// {
// ArchSpec arch;
// if (process)
// {
// arch = process->GetTarget().GetArchitecture();
// }
// PlatformSP platform_sp(create_callback(process, &arch));
// if (platform_sp)
// return platform_sp;
// }
// }
// else
// {
// for (uint32_t idx = 0; (create_callback =
// PluginManager::GetPlatformCreateCallbackAtIndex(idx)) != nullptr;
// ++idx)
// {
// PlatformSP platform_sp(create_callback(process, nullptr));
// if (platform_sp)
// return platform_sp;
// }
// }
// return PlatformSP();
//}
Status Platform::GetSharedModule(const ModuleSpec &module_spec,
Process *process, ModuleSP &module_sp,
const FileSpecList *module_search_paths_ptr,
ModuleSP *old_module_sp_ptr,
bool *did_create_ptr) {
if (IsHost())
return ModuleList::GetSharedModule(
module_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr,
did_create_ptr, false);
// Module resolver lambda.
auto resolver = [&](const ModuleSpec &spec) {
Status error(eErrorTypeGeneric);
ModuleSpec resolved_spec;
// Check if we have sysroot set.
if (m_sdk_sysroot) {
// Prepend sysroot to module spec.
resolved_spec = spec;
resolved_spec.GetFileSpec().PrependPathComponent(
m_sdk_sysroot.GetStringRef());
// Try to get shared module with resolved spec.
error = ModuleList::GetSharedModule(
resolved_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr,
did_create_ptr, false);
}
// If we don't have sysroot or it didn't work then
// try original module spec.
if (!error.Success()) {
resolved_spec = spec;
error = ModuleList::GetSharedModule(
resolved_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr,
did_create_ptr, false);
}
if (error.Success() && module_sp)
module_sp->SetPlatformFileSpec(resolved_spec.GetFileSpec());
return error;
};
return GetRemoteSharedModule(module_spec, process, module_sp, resolver,
did_create_ptr);
}
bool Platform::GetModuleSpec(const FileSpec &module_file_spec,
const ArchSpec &arch, ModuleSpec &module_spec) {
ModuleSpecList module_specs;
if (ObjectFile::GetModuleSpecifications(module_file_spec, 0, 0,
module_specs) == 0)
return false;
ModuleSpec matched_module_spec;
return module_specs.FindMatchingModuleSpec(ModuleSpec(module_file_spec, arch),
module_spec);
}
PlatformSP Platform::Find(ConstString name) {
if (name) {
static ConstString g_host_platform_name("host");
if (name == g_host_platform_name)
return GetHostPlatform();
std::lock_guard<std::recursive_mutex> guard(GetPlatformListMutex());
for (const auto &platform_sp : GetPlatformList()) {
if (platform_sp->GetName() == name)
return platform_sp;
}
}
return PlatformSP();
}
PlatformSP Platform::Create(ConstString name, Status &error) {
PlatformCreateInstance create_callback = nullptr;
lldb::PlatformSP platform_sp;
if (name) {
static ConstString g_host_platform_name("host");
if (name == g_host_platform_name)
return GetHostPlatform();
create_callback =
PluginManager::GetPlatformCreateCallbackForPluginName(name);
if (create_callback)
platform_sp = create_callback(true, nullptr);
else
error.SetErrorStringWithFormat(
"unable to find a plug-in for the platform named \"%s\"",
name.GetCString());
} else
error.SetErrorString("invalid platform name");
if (platform_sp) {
std::lock_guard<std::recursive_mutex> guard(GetPlatformListMutex());
GetPlatformList().push_back(platform_sp);
}
return platform_sp;
}
PlatformSP Platform::Create(const ArchSpec &arch, ArchSpec *platform_arch_ptr,
Status &error) {
lldb::PlatformSP platform_sp;
if (arch.IsValid()) {
// Scope for locker
{
// First try exact arch matches across all platforms already created
std::lock_guard<std::recursive_mutex> guard(GetPlatformListMutex());
for (const auto &platform_sp : GetPlatformList()) {
if (platform_sp->IsCompatibleArchitecture(arch, true,
platform_arch_ptr))
return platform_sp;
}
// Next try compatible arch matches across all platforms already created
for (const auto &platform_sp : GetPlatformList()) {
if (platform_sp->IsCompatibleArchitecture(arch, false,
platform_arch_ptr))
return platform_sp;
}
}
PlatformCreateInstance create_callback;
// First try exact arch matches across all platform plug-ins
uint32_t idx;
for (idx = 0; (create_callback =
PluginManager::GetPlatformCreateCallbackAtIndex(idx));
++idx) {
if (create_callback) {
platform_sp = create_callback(false, &arch);
if (platform_sp &&
platform_sp->IsCompatibleArchitecture(arch, true,
platform_arch_ptr)) {
std::lock_guard<std::recursive_mutex> guard(GetPlatformListMutex());
GetPlatformList().push_back(platform_sp);
return platform_sp;
}
}
}
// Next try compatible arch matches across all platform plug-ins
for (idx = 0; (create_callback =
PluginManager::GetPlatformCreateCallbackAtIndex(idx));
++idx) {
if (create_callback) {
platform_sp = create_callback(false, &arch);
if (platform_sp &&
platform_sp->IsCompatibleArchitecture(arch, false,
platform_arch_ptr)) {
std::lock_guard<std::recursive_mutex> guard(GetPlatformListMutex());
GetPlatformList().push_back(platform_sp);
return platform_sp;
}
}
}
} else
error.SetErrorString("invalid platform name");
if (platform_arch_ptr)
platform_arch_ptr->Clear();
platform_sp.reset();
return platform_sp;
}
ArchSpec Platform::GetAugmentedArchSpec(Platform *platform, llvm::StringRef triple) {
if (platform)
return platform->GetAugmentedArchSpec(triple);
return HostInfo::GetAugmentedArchSpec(triple);
}
/// Default Constructor
Platform::Platform(bool is_host)
: m_is_host(is_host), m_os_version_set_while_connected(false),
m_system_arch_set_while_connected(false), m_sdk_sysroot(), m_sdk_build(),
m_working_dir(), m_remote_url(), m_name(), m_system_arch(), m_mutex(),
m_max_uid_name_len(0), m_max_gid_name_len(0), m_supports_rsync(false),
m_rsync_opts(), m_rsync_prefix(), m_supports_ssh(false), m_ssh_opts(),
m_ignores_remote_hostname(false), m_trap_handlers(),
m_calculated_trap_handlers(false),
m_module_cache(llvm::make_unique<ModuleCache>()) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
if (log)
log->Printf("%p Platform::Platform()", static_cast<void *>(this));
}
/// Destructor.
///
/// The destructor is virtual since this class is designed to be
/// inherited from by the plug-in instance.
Platform::~Platform() {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
if (log)
log->Printf("%p Platform::~Platform()", static_cast<void *>(this));
}
void Platform::GetStatus(Stream &strm) {
std::string s;
strm.Printf(" Platform: %s\n", GetPluginName().GetCString());
ArchSpec arch(GetSystemArchitecture());
if (arch.IsValid()) {
if (!arch.GetTriple().str().empty()) {
strm.Printf(" Triple: ");
arch.DumpTriple(strm);
strm.EOL();
}
}
llvm::VersionTuple os_version = GetOSVersion();
if (!os_version.empty()) {
strm.Format("OS Version: {0}", os_version.getAsString());
if (GetOSBuildString(s))
strm.Printf(" (%s)", s.c_str());
strm.EOL();
}
if (GetOSKernelDescription(s))
strm.Printf(" Kernel: %s\n", s.c_str());
if (IsHost()) {
strm.Printf(" Hostname: %s\n", GetHostname());
} else {
const bool is_connected = IsConnected();
if (is_connected)
strm.Printf(" Hostname: %s\n", GetHostname());
strm.Printf(" Connected: %s\n", is_connected ? "yes" : "no");
}
if (GetWorkingDirectory()) {
strm.Printf("WorkingDir: %s\n", GetWorkingDirectory().GetCString());
}
if (!IsConnected())
return;
std::string specific_info(GetPlatformSpecificConnectionInformation());
if (!specific_info.empty())
strm.Printf("Platform-specific connection: %s\n", specific_info.c_str());
}
llvm::VersionTuple Platform::GetOSVersion(Process *process) {
std::lock_guard<std::mutex> guard(m_mutex);
if (IsHost()) {
if (m_os_version.empty()) {
// We have a local host platform
m_os_version = HostInfo::GetOSVersion();
m_os_version_set_while_connected = !m_os_version.empty();
}
} else {
// We have a remote platform. We can only fetch the remote
// OS version if we are connected, and we don't want to do it
// more than once.
const bool is_connected = IsConnected();
bool fetch = false;
if (!m_os_version.empty()) {
// We have valid OS version info, check to make sure it wasn't manually
// set prior to connecting. If it was manually set prior to connecting,
// then lets fetch the actual OS version info if we are now connected.
if (is_connected && !m_os_version_set_while_connected)
fetch = true;
} else {
// We don't have valid OS version info, fetch it if we are connected
fetch = is_connected;
}
if (fetch)
m_os_version_set_while_connected = GetRemoteOSVersion();
}
if (!m_os_version.empty())
return m_os_version;
if (process) {
// Check with the process in case it can answer the question if a process
// was provided
return process->GetHostOSVersion();
}
return llvm::VersionTuple();
}
bool Platform::GetOSBuildString(std::string &s) {
s.clear();
if (IsHost())
#if !defined(__linux__)
return HostInfo::GetOSBuildString(s);
#else
return false;
#endif
else
return GetRemoteOSBuildString(s);
}
bool Platform::GetOSKernelDescription(std::string &s) {
if (IsHost())
#if !defined(__linux__)
return HostInfo::GetOSKernelDescription(s);
#else
return false;
#endif
else
return GetRemoteOSKernelDescription(s);
}
void Platform::AddClangModuleCompilationOptions(
Target *target, std::vector<std::string> &options) {
std::vector<std::string> default_compilation_options = {
"-x", "c++", "-Xclang", "-nostdsysteminc", "-Xclang", "-nostdsysteminc"};
options.insert(options.end(), default_compilation_options.begin(),
default_compilation_options.end());
}
FileSpec Platform::GetWorkingDirectory() {
if (IsHost()) {
llvm::SmallString<64> cwd;
if (llvm::sys::fs::current_path(cwd))
return {};
else {
FileSpec file_spec(cwd);
FileSystem::Instance().Resolve(file_spec);
return file_spec;
}
} else {
if (!m_working_dir)
m_working_dir = GetRemoteWorkingDirectory();
return m_working_dir;
}
}
struct RecurseCopyBaton {
const FileSpec &dst;
Platform *platform_ptr;
Status error;
};
static FileSystem::EnumerateDirectoryResult
RecurseCopy_Callback(void *baton, llvm::sys::fs::file_type ft,
llvm::StringRef path) {
RecurseCopyBaton *rc_baton = (RecurseCopyBaton *)baton;
FileSpec src(path);
namespace fs = llvm::sys::fs;
switch (ft) {
case fs::file_type::fifo_file:
case fs::file_type::socket_file:
// we have no way to copy pipes and sockets - ignore them and continue
return FileSystem::eEnumerateDirectoryResultNext;
break;
case fs::file_type::directory_file: {
// make the new directory and get in there
FileSpec dst_dir = rc_baton->dst;
if (!dst_dir.GetFilename())
dst_dir.GetFilename() = src.GetLastPathComponent();
Status error = rc_baton->platform_ptr->MakeDirectory(
dst_dir, lldb::eFilePermissionsDirectoryDefault);
if (error.Fail()) {
rc_baton->error.SetErrorStringWithFormat(
"unable to setup directory %s on remote end", dst_dir.GetCString());
return FileSystem::eEnumerateDirectoryResultQuit; // got an error, bail out
}
// now recurse
std::string src_dir_path(src.GetPath());
// Make a filespec that only fills in the directory of a FileSpec so when
// we enumerate we can quickly fill in the filename for dst copies
FileSpec recurse_dst;
recurse_dst.GetDirectory().SetCString(dst_dir.GetPath().c_str());
RecurseCopyBaton rc_baton2 = {recurse_dst, rc_baton->platform_ptr,
Status()};
FileSystem::Instance().EnumerateDirectory(src_dir_path, true, true, true,
RecurseCopy_Callback, &rc_baton2);
if (rc_baton2.error.Fail()) {
rc_baton->error.SetErrorString(rc_baton2.error.AsCString());
return FileSystem::eEnumerateDirectoryResultQuit; // got an error, bail out
}
return FileSystem::eEnumerateDirectoryResultNext;
} break;
case fs::file_type::symlink_file: {
// copy the file and keep going
FileSpec dst_file = rc_baton->dst;
if (!dst_file.GetFilename())
dst_file.GetFilename() = src.GetFilename();
FileSpec src_resolved;
rc_baton->error = FileSystem::Instance().Readlink(src, src_resolved);
if (rc_baton->error.Fail())
return FileSystem::eEnumerateDirectoryResultQuit; // got an error, bail out
rc_baton->error =
rc_baton->platform_ptr->CreateSymlink(dst_file, src_resolved);
if (rc_baton->error.Fail())
return FileSystem::eEnumerateDirectoryResultQuit; // got an error, bail out
return FileSystem::eEnumerateDirectoryResultNext;
} break;
case fs::file_type::regular_file: {
// copy the file and keep going
FileSpec dst_file = rc_baton->dst;
if (!dst_file.GetFilename())
dst_file.GetFilename() = src.GetFilename();
Status err = rc_baton->platform_ptr->PutFile(src, dst_file);
if (err.Fail()) {
rc_baton->error.SetErrorString(err.AsCString());
return FileSystem::eEnumerateDirectoryResultQuit; // got an error, bail out
}
return FileSystem::eEnumerateDirectoryResultNext;
} break;
default:
rc_baton->error.SetErrorStringWithFormat(
"invalid file detected during copy: %s", src.GetPath().c_str());
return FileSystem::eEnumerateDirectoryResultQuit; // got an error, bail out
break;
}
llvm_unreachable("Unhandled file_type!");
}
Status Platform::Install(const FileSpec &src, const FileSpec &dst) {
Status error;
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
if (log)
log->Printf("Platform::Install (src='%s', dst='%s')", src.GetPath().c_str(),
dst.GetPath().c_str());
FileSpec fixed_dst(dst);
if (!fixed_dst.GetFilename())
fixed_dst.GetFilename() = src.GetFilename();
FileSpec working_dir = GetWorkingDirectory();
if (dst) {
if (dst.GetDirectory()) {
const char first_dst_dir_char = dst.GetDirectory().GetCString()[0];
if (first_dst_dir_char == '/' || first_dst_dir_char == '\\') {
fixed_dst.GetDirectory() = dst.GetDirectory();
}
// If the fixed destination file doesn't have a directory yet, then we
// must have a relative path. We will resolve this relative path against
// the platform's working directory
if (!fixed_dst.GetDirectory()) {
FileSpec relative_spec;
std::string path;
if (working_dir) {
relative_spec = working_dir;
relative_spec.AppendPathComponent(dst.GetPath());
fixed_dst.GetDirectory() = relative_spec.GetDirectory();
} else {
error.SetErrorStringWithFormat(
"platform working directory must be valid for relative path '%s'",
dst.GetPath().c_str());
return error;
}
}
} else {
if (working_dir) {
fixed_dst.GetDirectory().SetCString(working_dir.GetCString());
} else {
error.SetErrorStringWithFormat(
"platform working directory must be valid for relative path '%s'",
dst.GetPath().c_str());
return error;
}
}
} else {
if (working_dir) {
fixed_dst.GetDirectory().SetCString(working_dir.GetCString());
} else {
error.SetErrorStringWithFormat("platform working directory must be valid "
"when destination directory is empty");
return error;
}
}
if (log)
log->Printf("Platform::Install (src='%s', dst='%s') fixed_dst='%s'",
src.GetPath().c_str(), dst.GetPath().c_str(),
fixed_dst.GetPath().c_str());
if (GetSupportsRSync()) {
error = PutFile(src, dst);
} else {
namespace fs = llvm::sys::fs;
switch (fs::get_file_type(src.GetPath(), false)) {
case fs::file_type::directory_file: {
llvm::sys::fs::remove(fixed_dst.GetPath());
uint32_t permissions = FileSystem::Instance().GetPermissions(src);
if (permissions == 0)
permissions = eFilePermissionsDirectoryDefault;
error = MakeDirectory(fixed_dst, permissions);
if (error.Success()) {
// Make a filespec that only fills in the directory of a FileSpec so
// when we enumerate we can quickly fill in the filename for dst copies
FileSpec recurse_dst;
recurse_dst.GetDirectory().SetCString(fixed_dst.GetCString());
std::string src_dir_path(src.GetPath());
RecurseCopyBaton baton = {recurse_dst, this, Status()};
FileSystem::Instance().EnumerateDirectory(
src_dir_path, true, true, true, RecurseCopy_Callback, &baton);
return baton.error;
}
} break;
case fs::file_type::regular_file:
llvm::sys::fs::remove(fixed_dst.GetPath());
error = PutFile(src, fixed_dst);
break;
case fs::file_type::symlink_file: {
llvm::sys::fs::remove(fixed_dst.GetPath());
FileSpec src_resolved;
error = FileSystem::Instance().Readlink(src, src_resolved);
if (error.Success())
error = CreateSymlink(dst, src_resolved);
} break;
case fs::file_type::fifo_file:
error.SetErrorString("platform install doesn't handle pipes");
break;
case fs::file_type::socket_file:
error.SetErrorString("platform install doesn't handle sockets");
break;
default:
error.SetErrorString(
"platform install doesn't handle non file or directory items");
break;
}
}
return error;
}
bool Platform::SetWorkingDirectory(const FileSpec &file_spec) {
if (IsHost()) {
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
LLDB_LOG(log, "{0}", file_spec);
if (std::error_code ec = llvm::sys::fs::set_current_path(file_spec.GetPath())) {
LLDB_LOG(log, "error: {0}", ec.message());
return false;
}
return true;
} else {
m_working_dir.Clear();
return SetRemoteWorkingDirectory(file_spec);
}
}
Status Platform::MakeDirectory(const FileSpec &file_spec,
uint32_t permissions) {
if (IsHost())
return llvm::sys::fs::create_directory(file_spec.GetPath(), permissions);
else {
Status error;
error.SetErrorStringWithFormat("remote platform %s doesn't support %s",
GetPluginName().GetCString(),
LLVM_PRETTY_FUNCTION);
return error;
}
}
Status Platform::GetFilePermissions(const FileSpec &file_spec,
uint32_t &file_permissions) {
if (IsHost()) {
auto Value = llvm::sys::fs::getPermissions(file_spec.GetPath());
if (Value)
file_permissions = Value.get();
return Status(Value.getError());
} else {
Status error;
error.SetErrorStringWithFormat("remote platform %s doesn't support %s",
GetPluginName().GetCString(),
LLVM_PRETTY_FUNCTION);
return error;
}
}
Status Platform::SetFilePermissions(const FileSpec &file_spec,
uint32_t file_permissions) {
if (IsHost()) {
auto Perms = static_cast<llvm::sys::fs::perms>(file_permissions);
return llvm::sys::fs::setPermissions(file_spec.GetPath(), Perms);
} else {
Status error;
error.SetErrorStringWithFormat("remote platform %s doesn't support %s",
GetPluginName().GetCString(),
LLVM_PRETTY_FUNCTION);
return error;
}
}
ConstString Platform::GetName() { return GetPluginName(); }
const char *Platform::GetHostname() {
if (IsHost())
return "127.0.0.1";
if (m_name.empty())
return nullptr;
return m_name.c_str();
}
ConstString Platform::GetFullNameForDylib(ConstString basename) {
return basename;
}
bool Platform::SetRemoteWorkingDirectory(const FileSpec &working_dir) {
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
if (log)
log->Printf("Platform::SetRemoteWorkingDirectory('%s')",
working_dir.GetCString());
m_working_dir = working_dir;
return true;
}
bool Platform::SetOSVersion(llvm::VersionTuple version) {
if (IsHost()) {
// We don't need anyone setting the OS version for the host platform, we
// should be able to figure it out by calling HostInfo::GetOSVersion(...).
return false;
} else {
// We have a remote platform, allow setting the target OS version if we
// aren't connected, since if we are connected, we should be able to
// request the remote OS version from the connected platform.
if (IsConnected())
return false;
else {
// We aren't connected and we might want to set the OS version ahead of
// time before we connect so we can peruse files and use a local SDK or
// PDK cache of support files to disassemble or do other things.
m_os_version = version;
return true;
}
}
return false;
}
Status
Platform::ResolveExecutable(const ModuleSpec &module_spec,
lldb::ModuleSP &exe_module_sp,
const FileSpecList *module_search_paths_ptr) {
Status error;
if (FileSystem::Instance().Exists(module_spec.GetFileSpec())) {
if (module_spec.GetArchitecture().IsValid()) {
error = ModuleList::GetSharedModule(module_spec, exe_module_sp,
module_search_paths_ptr, nullptr,
nullptr);
} else {
// No valid architecture was specified, ask the platform for the
// architectures that we should be using (in the correct order) and see
// if we can find a match that way
ModuleSpec arch_module_spec(module_spec);
for (uint32_t idx = 0; GetSupportedArchitectureAtIndex(
idx, arch_module_spec.GetArchitecture());
++idx) {
error = ModuleList::GetSharedModule(arch_module_spec, exe_module_sp,
module_search_paths_ptr, nullptr,
nullptr);
// Did we find an executable using one of the
if (error.Success() && exe_module_sp)
break;
}
}
} else {
error.SetErrorStringWithFormat("'%s' does not exist",
module_spec.GetFileSpec().GetPath().c_str());
}
return error;
}
Status Platform::ResolveSymbolFile(Target &target, const ModuleSpec &sym_spec,
FileSpec &sym_file) {
Status error;
if (FileSystem::Instance().Exists(sym_spec.GetSymbolFileSpec()))
sym_file = sym_spec.GetSymbolFileSpec();
else
error.SetErrorString("unable to resolve symbol file");
return error;
}
bool Platform::ResolveRemotePath(const FileSpec &platform_path,
FileSpec &resolved_platform_path) {
resolved_platform_path = platform_path;
FileSystem::Instance().Resolve(resolved_platform_path);
return true;
}
const ArchSpec &Platform::GetSystemArchitecture() {
if (IsHost()) {
if (!m_system_arch.IsValid()) {
// We have a local host platform
m_system_arch = HostInfo::GetArchitecture();
m_system_arch_set_while_connected = m_system_arch.IsValid();
}
} else {
// We have a remote platform. We can only fetch the remote system
// architecture if we are connected, and we don't want to do it more than
// once.
const bool is_connected = IsConnected();
bool fetch = false;
if (m_system_arch.IsValid()) {
// We have valid OS version info, check to make sure it wasn't manually
// set prior to connecting. If it was manually set prior to connecting,
// then lets fetch the actual OS version info if we are now connected.
if (is_connected && !m_system_arch_set_while_connected)
fetch = true;
} else {
// We don't have valid OS version info, fetch it if we are connected
fetch = is_connected;
}
if (fetch) {
m_system_arch = GetRemoteSystemArchitecture();
m_system_arch_set_while_connected = m_system_arch.IsValid();
}
}
return m_system_arch;
}
ArchSpec Platform::GetAugmentedArchSpec(llvm::StringRef triple) {
if (triple.empty())
return ArchSpec();
llvm::Triple normalized_triple(llvm::Triple::normalize(triple));
if (!ArchSpec::ContainsOnlyArch(normalized_triple))
return ArchSpec(triple);
if (auto kind = HostInfo::ParseArchitectureKind(triple))
return HostInfo::GetArchitecture(*kind);
ArchSpec compatible_arch;
ArchSpec raw_arch(triple);
if (!IsCompatibleArchitecture(raw_arch, false, &compatible_arch))
return raw_arch;
if (!compatible_arch.IsValid())
return ArchSpec(normalized_triple);
const llvm::Triple &compatible_triple = compatible_arch.GetTriple();
if (normalized_triple.getVendorName().empty())
normalized_triple.setVendor(compatible_triple.getVendor());
if (normalized_triple.getOSName().empty())
normalized_triple.setOS(compatible_triple.getOS());
if (normalized_triple.getEnvironmentName().empty())
normalized_triple.setEnvironment(compatible_triple.getEnvironment());
return ArchSpec(normalized_triple);
}
Status Platform::ConnectRemote(Args &args) {
Status error;
if (IsHost())
error.SetErrorStringWithFormat("The currently selected platform (%s) is "
"the host platform and is always connected.",
GetPluginName().GetCString());
else
error.SetErrorStringWithFormat(
"Platform::ConnectRemote() is not supported by %s",
GetPluginName().GetCString());
return error;
}
Status Platform::DisconnectRemote() {
Status error;
if (IsHost())
error.SetErrorStringWithFormat("The currently selected platform (%s) is "
"the host platform and is always connected.",
GetPluginName().GetCString());
else
error.SetErrorStringWithFormat(
"Platform::DisconnectRemote() is not supported by %s",
GetPluginName().GetCString());
return error;
}
bool Platform::GetProcessInfo(lldb::pid_t pid,
ProcessInstanceInfo &process_info) {
// Take care of the host case so that each subclass can just call this
// function to get the host functionality.
if (IsHost())
return Host::GetProcessInfo(pid, process_info);
return false;
}
uint32_t Platform::FindProcesses(const ProcessInstanceInfoMatch &match_info,
ProcessInstanceInfoList &process_infos) {
// Take care of the host case so that each subclass can just call this
// function to get the host functionality.
uint32_t match_count = 0;
if (IsHost())
match_count = Host::FindProcesses(match_info, process_infos);
return match_count;
}
Status Platform::LaunchProcess(ProcessLaunchInfo &launch_info) {
Status error;
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (log)
log->Printf("Platform::%s()", __FUNCTION__);
// Take care of the host case so that each subclass can just call this
// function to get the host functionality.
if (IsHost()) {
if (::getenv("LLDB_LAUNCH_FLAG_LAUNCH_IN_TTY"))
launch_info.GetFlags().Set(eLaunchFlagLaunchInTTY);
if (launch_info.GetFlags().Test(eLaunchFlagLaunchInShell)) {
const bool is_localhost = true;
const bool will_debug = launch_info.GetFlags().Test(eLaunchFlagDebug);
const bool first_arg_is_full_shell_command = false;
uint32_t num_resumes = GetResumeCountForLaunchInfo(launch_info);
if (log) {
const FileSpec &shell = launch_info.GetShell();
std::string shell_str = (shell) ? shell.GetPath() : "<null>";
log->Printf(
"Platform::%s GetResumeCountForLaunchInfo() returned %" PRIu32
", shell is '%s'",
__FUNCTION__, num_resumes, shell_str.c_str());
}
if (!launch_info.ConvertArgumentsForLaunchingInShell(
error, is_localhost, will_debug, first_arg_is_full_shell_command,
num_resumes))
return error;
} else if (launch_info.GetFlags().Test(eLaunchFlagShellExpandArguments)) {
error = ShellExpandArguments(launch_info);
if (error.Fail()) {
error.SetErrorStringWithFormat("shell expansion failed (reason: %s). "
"consider launching with 'process "
"launch'.",
error.AsCString("unknown"));
return error;
}
}
if (log)
log->Printf("Platform::%s final launch_info resume count: %" PRIu32,
__FUNCTION__, launch_info.GetResumeCount());
error = Host::LaunchProcess(launch_info);
} else
error.SetErrorString(
"base lldb_private::Platform class can't launch remote processes");
return error;
}
Status Platform::ShellExpandArguments(ProcessLaunchInfo &launch_info) {
if (IsHost())
return Host::ShellExpandArguments(launch_info);
return Status("base lldb_private::Platform class can't expand arguments");
}
Status Platform::KillProcess(const lldb::pid_t pid) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (log)
log->Printf("Platform::%s, pid %" PRIu64, __FUNCTION__, pid);
// Try to find a process plugin to handle this Kill request. If we can't,
// fall back to the default OS implementation.
size_t num_debuggers = Debugger::GetNumDebuggers();
for (size_t didx = 0; didx < num_debuggers; ++didx) {
DebuggerSP debugger = Debugger::GetDebuggerAtIndex(didx);
lldb_private::TargetList &targets = debugger->GetTargetList();
for (int tidx = 0; tidx < targets.GetNumTargets(); ++tidx) {
ProcessSP process = targets.GetTargetAtIndex(tidx)->GetProcessSP();
if (process->GetID() == pid)
return process->Destroy(true);
}
}
if (!IsHost()) {
return Status(
"base lldb_private::Platform class can't kill remote processes unless "
"they are controlled by a process plugin");
}
Host::Kill(pid, SIGTERM);
return Status();
}
lldb::ProcessSP
Platform::DebugProcess(ProcessLaunchInfo &launch_info, Debugger &debugger,
Target *target, // Can be nullptr, if nullptr create a
// new target, else use existing one
Status &error) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (log)
log->Printf("Platform::%s entered (target %p)", __FUNCTION__,
static_cast<void *>(target));
ProcessSP process_sp;
// Make sure we stop at the entry point
launch_info.GetFlags().Set(eLaunchFlagDebug);
// We always launch the process we are going to debug in a separate process
// group, since then we can handle ^C interrupts ourselves w/o having to
// worry about the target getting them as well.
launch_info.SetLaunchInSeparateProcessGroup(true);
// Allow any StructuredData process-bound plugins to adjust the launch info
// if needed
size_t i = 0;
bool iteration_complete = false;
// Note iteration can't simply go until a nullptr callback is returned, as it
// is valid for a plugin to not supply a filter.
auto get_filter_func = PluginManager::GetStructuredDataFilterCallbackAtIndex;
for (auto filter_callback = get_filter_func(i, iteration_complete);
!iteration_complete;
filter_callback = get_filter_func(++i, iteration_complete)) {
if (filter_callback) {
// Give this ProcessLaunchInfo filter a chance to adjust the launch info.
error = (*filter_callback)(launch_info, target);
if (!error.Success()) {
if (log)
log->Printf("Platform::%s() StructuredDataPlugin launch "
"filter failed.",
__FUNCTION__);
return process_sp;
}
}
}
error = LaunchProcess(launch_info);
if (error.Success()) {
if (log)
log->Printf("Platform::%s LaunchProcess() call succeeded (pid=%" PRIu64
")",
__FUNCTION__, launch_info.GetProcessID());
if (launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) {
ProcessAttachInfo attach_info(launch_info);
process_sp = Attach(attach_info, debugger, target, error);
if (process_sp) {
if (log)
log->Printf("Platform::%s Attach() succeeded, Process plugin: %s",
__FUNCTION__, process_sp->GetPluginName().AsCString());
launch_info.SetHijackListener(attach_info.GetHijackListener());
// Since we attached to the process, it will think it needs to detach
// if the process object just goes away without an explicit call to
// Process::Kill() or Process::Detach(), so let it know to kill the
// process if this happens.
process_sp->SetShouldDetach(false);
// If we didn't have any file actions, the pseudo terminal might have
// been used where the slave side was given as the file to open for
// stdin/out/err after we have already opened the master so we can
// read/write stdin/out/err.
int pty_fd = launch_info.GetPTY().ReleaseMasterFileDescriptor();
if (pty_fd != PseudoTerminal::invalid_fd) {
process_sp->SetSTDIOFileDescriptor(pty_fd);
}
} else {
if (log)
log->Printf("Platform::%s Attach() failed: %s", __FUNCTION__,
error.AsCString());
}
} else {
if (log)
log->Printf("Platform::%s LaunchProcess() returned launch_info with "
"invalid process id",
__FUNCTION__);
}
} else {
if (log)
log->Printf("Platform::%s LaunchProcess() failed: %s", __FUNCTION__,
error.AsCString());
}
return process_sp;
}
lldb::PlatformSP
Platform::GetPlatformForArchitecture(const ArchSpec &arch,
ArchSpec *platform_arch_ptr) {
lldb::PlatformSP platform_sp;
Status error;
if (arch.IsValid())
platform_sp = Platform::Create(arch, platform_arch_ptr, error);
return platform_sp;
}
/// Lets a platform answer if it is compatible with a given
/// architecture and the target triple contained within.
bool Platform::IsCompatibleArchitecture(const ArchSpec &arch,
bool exact_arch_match,
ArchSpec *compatible_arch_ptr) {
// If the architecture is invalid, we must answer true...
if (arch.IsValid()) {
ArchSpec platform_arch;
// Try for an exact architecture match first.
if (exact_arch_match) {
for (uint32_t arch_idx = 0;
GetSupportedArchitectureAtIndex(arch_idx, platform_arch);
++arch_idx) {
if (arch.IsExactMatch(platform_arch)) {
if (compatible_arch_ptr)
*compatible_arch_ptr = platform_arch;
return true;
}
}
} else {
for (uint32_t arch_idx = 0;
GetSupportedArchitectureAtIndex(arch_idx, platform_arch);
++arch_idx) {
if (arch.IsCompatibleMatch(platform_arch)) {
if (compatible_arch_ptr)
*compatible_arch_ptr = platform_arch;
return true;
}
}
}
}
if (compatible_arch_ptr)
compatible_arch_ptr->Clear();
return false;
}
Status Platform::PutFile(const FileSpec &source, const FileSpec &destination,
uint32_t uid, uint32_t gid) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (log)
log->Printf("[PutFile] Using block by block transfer....\n");
uint32_t source_open_options =
File::eOpenOptionRead | File::eOpenOptionCloseOnExec;
namespace fs = llvm::sys::fs;
if (fs::is_symlink_file(source.GetPath()))
source_open_options |= File::eOpenOptionDontFollowSymlinks;
File source_file;
Status error = FileSystem::Instance().Open(
source_file, source, source_open_options, lldb::eFilePermissionsUserRW);
uint32_t permissions = source_file.GetPermissions(error);
if (permissions == 0)
permissions = lldb::eFilePermissionsFileDefault;
if (!source_file.IsValid())
return Status("PutFile: unable to open source file");
lldb::user_id_t dest_file = OpenFile(
destination, File::eOpenOptionCanCreate | File::eOpenOptionWrite |
File::eOpenOptionTruncate | File::eOpenOptionCloseOnExec,
permissions, error);
if (log)
log->Printf("dest_file = %" PRIu64 "\n", dest_file);
if (error.Fail())
return error;
if (dest_file == UINT64_MAX)
return Status("unable to open target file");
lldb::DataBufferSP buffer_sp(new DataBufferHeap(1024 * 16, 0));
uint64_t offset = 0;
for (;;) {
size_t bytes_read = buffer_sp->GetByteSize();
error = source_file.Read(buffer_sp->GetBytes(), bytes_read);
if (error.Fail() || bytes_read == 0)
break;
const uint64_t bytes_written =
WriteFile(dest_file, offset, buffer_sp->GetBytes(), bytes_read, error);
if (error.Fail())
break;
offset += bytes_written;
if (bytes_written != bytes_read) {
// We didn't write the correct number of bytes, so adjust the file
// position in the source file we are reading from...
source_file.SeekFromStart(offset);
}
}
CloseFile(dest_file, error);
if (uid == UINT32_MAX && gid == UINT32_MAX)
return error;
// TODO: ChownFile?
return error;
}
Status Platform::GetFile(const FileSpec &source, const FileSpec &destination) {
Status error("unimplemented");
return error;
}
Status
Platform::CreateSymlink(const FileSpec &src, // The name of the link is in src
const FileSpec &dst) // The symlink points to dst
{
Status error("unimplemented");
return error;
}
bool Platform::GetFileExists(const lldb_private::FileSpec &file_spec) {
return false;
}
Status Platform::Unlink(const FileSpec &path) {
Status error("unimplemented");
return error;
}
MmapArgList Platform::GetMmapArgumentList(const ArchSpec &arch, addr_t addr,
addr_t length, unsigned prot,
unsigned flags, addr_t fd,
addr_t offset) {
uint64_t flags_platform = 0;
if (flags & eMmapFlagsPrivate)
flags_platform |= MAP_PRIVATE;
if (flags & eMmapFlagsAnon)
flags_platform |= MAP_ANON;
MmapArgList args({addr, length, prot, flags_platform, fd, offset});
return args;
}
lldb_private::Status Platform::RunShellCommand(
const char *command, // Shouldn't be nullptr
const FileSpec &
working_dir, // Pass empty FileSpec to use the current working directory
int *status_ptr, // Pass nullptr if you don't want the process exit status
int *signo_ptr, // Pass nullptr if you don't want the signal that caused the
// process to exit
std::string
*command_output, // Pass nullptr if you don't want the command output
const Timeout<std::micro> &timeout) {
if (IsHost())
return Host::RunShellCommand(command, working_dir, status_ptr, signo_ptr,
command_output, timeout);
else
return Status("unimplemented");
}
bool Platform::CalculateMD5(const FileSpec &file_spec, uint64_t &low,
uint64_t &high) {
if (!IsHost())
return false;
auto Result = llvm::sys::fs::md5_contents(file_spec.GetPath());
if (!Result)
return false;
std::tie(high, low) = Result->words();
return true;
}
void Platform::SetLocalCacheDirectory(const char *local) {
m_local_cache_directory.assign(local);
}
const char *Platform::GetLocalCacheDirectory() {
return m_local_cache_directory.c_str();
}
static constexpr OptionDefinition g_rsync_option_table[] = {
{LLDB_OPT_SET_ALL, false, "rsync", 'r', OptionParser::eNoArgument, nullptr,
{}, 0, eArgTypeNone, "Enable rsync."},
{LLDB_OPT_SET_ALL, false, "rsync-opts", 'R',
OptionParser::eRequiredArgument, nullptr, {}, 0, eArgTypeCommandName,
"Platform-specific options required for rsync to work."},
{LLDB_OPT_SET_ALL, false, "rsync-prefix", 'P',
OptionParser::eRequiredArgument, nullptr, {}, 0, eArgTypeCommandName,
"Platform-specific rsync prefix put before the remote path."},
{LLDB_OPT_SET_ALL, false, "ignore-remote-hostname", 'i',
OptionParser::eNoArgument, nullptr, {}, 0, eArgTypeNone,
"Do not automatically fill in the remote hostname when composing the "
"rsync command."},
};
static constexpr OptionDefinition g_ssh_option_table[] = {
{LLDB_OPT_SET_ALL, false, "ssh", 's', OptionParser::eNoArgument, nullptr,
{}, 0, eArgTypeNone, "Enable SSH."},
{LLDB_OPT_SET_ALL, false, "ssh-opts", 'S', OptionParser::eRequiredArgument,
nullptr, {}, 0, eArgTypeCommandName,
"Platform-specific options required for SSH to work."},
};
static constexpr OptionDefinition g_caching_option_table[] = {
{LLDB_OPT_SET_ALL, false, "local-cache-dir", 'c',
OptionParser::eRequiredArgument, nullptr, {}, 0, eArgTypePath,
"Path in which to store local copies of files."},
};
llvm::ArrayRef<OptionDefinition> OptionGroupPlatformRSync::GetDefinitions() {
return llvm::makeArrayRef(g_rsync_option_table);
}
void OptionGroupPlatformRSync::OptionParsingStarting(
ExecutionContext *execution_context) {
m_rsync = false;
m_rsync_opts.clear();
m_rsync_prefix.clear();
m_ignores_remote_hostname = false;
}
lldb_private::Status
OptionGroupPlatformRSync::SetOptionValue(uint32_t option_idx,
llvm::StringRef option_arg,
ExecutionContext *execution_context) {
Status error;
char short_option = (char)GetDefinitions()[option_idx].short_option;
switch (short_option) {
case 'r':
m_rsync = true;
break;
case 'R':
m_rsync_opts.assign(option_arg);
break;
case 'P':
m_rsync_prefix.assign(option_arg);
break;
case 'i':
m_ignores_remote_hostname = true;
break;
default:
error.SetErrorStringWithFormat("unrecognized option '%c'", short_option);
break;
}
return error;
}
lldb::BreakpointSP
Platform::SetThreadCreationBreakpoint(lldb_private::Target &target) {
return lldb::BreakpointSP();
}
llvm::ArrayRef<OptionDefinition> OptionGroupPlatformSSH::GetDefinitions() {
return llvm::makeArrayRef(g_ssh_option_table);
}
void OptionGroupPlatformSSH::OptionParsingStarting(
ExecutionContext *execution_context) {
m_ssh = false;
m_ssh_opts.clear();
}
lldb_private::Status
OptionGroupPlatformSSH::SetOptionValue(uint32_t option_idx,
llvm::StringRef option_arg,
ExecutionContext *execution_context) {
Status error;
char short_option = (char)GetDefinitions()[option_idx].short_option;
switch (short_option) {
case 's':
m_ssh = true;
break;
case 'S':
m_ssh_opts.assign(option_arg);
break;
default:
error.SetErrorStringWithFormat("unrecognized option '%c'", short_option);
break;
}
return error;
}
llvm::ArrayRef<OptionDefinition> OptionGroupPlatformCaching::GetDefinitions() {
return llvm::makeArrayRef(g_caching_option_table);
}
void OptionGroupPlatformCaching::OptionParsingStarting(
ExecutionContext *execution_context) {
m_cache_dir.clear();
}
lldb_private::Status OptionGroupPlatformCaching::SetOptionValue(
uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) {
Status error;
char short_option = (char)GetDefinitions()[option_idx].short_option;
switch (short_option) {
case 'c':
m_cache_dir.assign(option_arg);
break;
default:
error.SetErrorStringWithFormat("unrecognized option '%c'", short_option);
break;
}
return error;
}
Environment Platform::GetEnvironment() { return Environment(); }
const std::vector<ConstString> &Platform::GetTrapHandlerSymbolNames() {
if (!m_calculated_trap_handlers) {
std::lock_guard<std::mutex> guard(m_mutex);
if (!m_calculated_trap_handlers) {
CalculateTrapHandlerSymbolNames();
m_calculated_trap_handlers = true;
}
}
return m_trap_handlers;
}
Status Platform::GetCachedExecutable(
ModuleSpec &module_spec, lldb::ModuleSP &module_sp,
const FileSpecList *module_search_paths_ptr, Platform &remote_platform) {
const auto platform_spec = module_spec.GetFileSpec();
const auto error = LoadCachedExecutable(
module_spec, module_sp, module_search_paths_ptr, remote_platform);
if (error.Success()) {
module_spec.GetFileSpec() = module_sp->GetFileSpec();
module_spec.GetPlatformFileSpec() = platform_spec;
}
return error;
}
Status Platform::LoadCachedExecutable(
const ModuleSpec &module_spec, lldb::ModuleSP &module_sp,
const FileSpecList *module_search_paths_ptr, Platform &remote_platform) {
return GetRemoteSharedModule(module_spec, nullptr, module_sp,
[&](const ModuleSpec &spec) {
return remote_platform.ResolveExecutable(
spec, module_sp, module_search_paths_ptr);
},
nullptr);
}
Status Platform::GetRemoteSharedModule(const ModuleSpec &module_spec,
Process *process,
lldb::ModuleSP &module_sp,
const ModuleResolver &module_resolver,
bool *did_create_ptr) {
// Get module information from a target.
ModuleSpec resolved_module_spec;
bool got_module_spec = false;
if (process) {
// Try to get module information from the process
if (process->GetModuleSpec(module_spec.GetFileSpec(),
module_spec.GetArchitecture(),
resolved_module_spec)) {
if (!module_spec.GetUUID().IsValid() ||
module_spec.GetUUID() == resolved_module_spec.GetUUID()) {
got_module_spec = true;
}
}
}
if (!module_spec.GetArchitecture().IsValid()) {
Status error;
// No valid architecture was specified, ask the platform for the
// architectures that we should be using (in the correct order) and see if
// we can find a match that way
ModuleSpec arch_module_spec(module_spec);
for (uint32_t idx = 0; GetSupportedArchitectureAtIndex(
idx, arch_module_spec.GetArchitecture());
++idx) {
error = ModuleList::GetSharedModule(arch_module_spec, module_sp, nullptr,
nullptr, nullptr);
// Did we find an executable using one of the
if (error.Success() && module_sp)
break;
}
if (module_sp)
got_module_spec = true;
}
if (!got_module_spec) {
// Get module information from a target.
if (!GetModuleSpec(module_spec.GetFileSpec(), module_spec.GetArchitecture(),
resolved_module_spec)) {
if (!module_spec.GetUUID().IsValid() ||
module_spec.GetUUID() == resolved_module_spec.GetUUID()) {
return module_resolver(module_spec);
}
}
}
// If we are looking for a specific UUID, make sure resolved_module_spec has
// the same one before we search.
if (module_spec.GetUUID().IsValid()) {
resolved_module_spec.GetUUID() = module_spec.GetUUID();
}
// Trying to find a module by UUID on local file system.
const auto error = module_resolver(resolved_module_spec);
if (error.Fail()) {
if (GetCachedSharedModule(resolved_module_spec, module_sp, did_create_ptr))
return Status();
}
return error;
}
bool Platform::GetCachedSharedModule(const ModuleSpec &module_spec,
lldb::ModuleSP &module_sp,
bool *did_create_ptr) {
if (IsHost() || !GetGlobalPlatformProperties()->GetUseModuleCache() ||
!GetGlobalPlatformProperties()->GetModuleCacheDirectory())
return false;
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
// Check local cache for a module.
auto error = m_module_cache->GetAndPut(
GetModuleCacheRoot(), GetCacheHostname(), module_spec,
[this](const ModuleSpec &module_spec,
const FileSpec &tmp_download_file_spec) {
return DownloadModuleSlice(
module_spec.GetFileSpec(), module_spec.GetObjectOffset(),
module_spec.GetObjectSize(), tmp_download_file_spec);
},
[this](const ModuleSP &module_sp,
const FileSpec &tmp_download_file_spec) {
return DownloadSymbolFile(module_sp, tmp_download_file_spec);
},
module_sp, did_create_ptr);
if (error.Success())
return true;
if (log)
log->Printf("Platform::%s - module %s not found in local cache: %s",
__FUNCTION__, module_spec.GetUUID().GetAsString().c_str(),
error.AsCString());
return false;
}
Status Platform::DownloadModuleSlice(const FileSpec &src_file_spec,
const uint64_t src_offset,
const uint64_t src_size,
const FileSpec &dst_file_spec) {
Status error;
std::error_code EC;
llvm::raw_fd_ostream dst(dst_file_spec.GetPath(), EC, llvm::sys::fs::F_None);
if (EC) {
error.SetErrorStringWithFormat("unable to open destination file: %s",
dst_file_spec.GetPath().c_str());
return error;
}
auto src_fd = OpenFile(src_file_spec, File::eOpenOptionRead,
lldb::eFilePermissionsFileDefault, error);
if (error.Fail()) {
error.SetErrorStringWithFormat("unable to open source file: %s",
error.AsCString());
return error;
}
std::vector<char> buffer(1024);
auto offset = src_offset;
uint64_t total_bytes_read = 0;
while (total_bytes_read < src_size) {
const auto to_read = std::min(static_cast<uint64_t>(buffer.size()),
src_size - total_bytes_read);
const uint64_t n_read =
ReadFile(src_fd, offset, &buffer[0], to_read, error);
if (error.Fail())
break;
if (n_read == 0) {
error.SetErrorString("read 0 bytes");
break;
}
offset += n_read;
total_bytes_read += n_read;
dst.write(&buffer[0], n_read);
}
Status close_error;
CloseFile(src_fd, close_error); // Ignoring close error.
return error;
}
Status Platform::DownloadSymbolFile(const lldb::ModuleSP &module_sp,
const FileSpec &dst_file_spec) {
return Status(
"Symbol file downloading not supported by the default platform.");
}
FileSpec Platform::GetModuleCacheRoot() {
auto dir_spec = GetGlobalPlatformProperties()->GetModuleCacheDirectory();
dir_spec.AppendPathComponent(GetName().AsCString());
return dir_spec;
}
const char *Platform::GetCacheHostname() { return GetHostname(); }
const UnixSignalsSP &Platform::GetRemoteUnixSignals() {
static const auto s_default_unix_signals_sp = std::make_shared<UnixSignals>();
return s_default_unix_signals_sp;
}
UnixSignalsSP Platform::GetUnixSignals() {
if (IsHost())
return UnixSignals::CreateForHost();
return GetRemoteUnixSignals();
}
uint32_t Platform::LoadImage(lldb_private::Process *process,
const lldb_private::FileSpec &local_file,
const lldb_private::FileSpec &remote_file,
lldb_private::Status &error) {
if (local_file && remote_file) {
// Both local and remote file was specified. Install the local file to the
// given location.
if (IsRemote() || local_file != remote_file) {
error = Install(local_file, remote_file);
if (error.Fail())
return LLDB_INVALID_IMAGE_TOKEN;
}
return DoLoadImage(process, remote_file, nullptr, error);
}
if (local_file) {
// Only local file was specified. Install it to the current working
// directory.
FileSpec target_file = GetWorkingDirectory();
target_file.AppendPathComponent(local_file.GetFilename().AsCString());
if (IsRemote() || local_file != target_file) {
error = Install(local_file, target_file);
if (error.Fail())
return LLDB_INVALID_IMAGE_TOKEN;
}
return DoLoadImage(process, target_file, nullptr, error);
}
if (remote_file) {
// Only remote file was specified so we don't have to do any copying
return DoLoadImage(process, remote_file, nullptr, error);
}
error.SetErrorString("Neither local nor remote file was specified");
return LLDB_INVALID_IMAGE_TOKEN;
}
uint32_t Platform::DoLoadImage(lldb_private::Process *process,
const lldb_private::FileSpec &remote_file,
const std::vector<std::string> *paths,
lldb_private::Status &error,
lldb_private::FileSpec *loaded_image) {
error.SetErrorString("LoadImage is not supported on the current platform");
return LLDB_INVALID_IMAGE_TOKEN;
}
uint32_t Platform::LoadImageUsingPaths(lldb_private::Process *process,
const lldb_private::FileSpec &remote_filename,
const std::vector<std::string> &paths,
lldb_private::Status &error,
lldb_private::FileSpec *loaded_path)
{
FileSpec file_to_use;
if (remote_filename.IsAbsolute())
file_to_use = FileSpec(remote_filename.GetFilename().GetStringRef(),
remote_filename.GetPathStyle());
else
file_to_use = remote_filename;
return DoLoadImage(process, file_to_use, &paths, error, loaded_path);
}
Status Platform::UnloadImage(lldb_private::Process *process,
uint32_t image_token) {
return Status("UnloadImage is not supported on the current platform");
}
lldb::ProcessSP Platform::ConnectProcess(llvm::StringRef connect_url,
llvm::StringRef plugin_name,
lldb_private::Debugger &debugger,
lldb_private::Target *target,
lldb_private::Status &error) {
error.Clear();
if (!target) {
ArchSpec arch;
if (target && target->GetArchitecture().IsValid())
arch = target->GetArchitecture();
else
arch = Target::GetDefaultArchitecture();
const char *triple = "";
if (arch.IsValid())
triple = arch.GetTriple().getTriple().c_str();
TargetSP new_target_sp;
error = debugger.GetTargetList().CreateTarget(
debugger, "", triple, eLoadDependentsNo, nullptr, new_target_sp);
target = new_target_sp.get();
}
if (!target || error.Fail())
return nullptr;
debugger.GetTargetList().SetSelectedTarget(target);
lldb::ProcessSP process_sp =
target->CreateProcess(debugger.GetListener(), plugin_name, nullptr);
if (!process_sp)
return nullptr;
error =
process_sp->ConnectRemote(debugger.GetOutputFile().get(), connect_url);
if (error.Fail())
return nullptr;
return process_sp;
}
size_t Platform::ConnectToWaitingProcesses(lldb_private::Debugger &debugger,
lldb_private::Status &error) {
error.Clear();
return 0;
}
size_t Platform::GetSoftwareBreakpointTrapOpcode(Target &target,
BreakpointSite *bp_site) {
ArchSpec arch = target.GetArchitecture();
const uint8_t *trap_opcode = nullptr;
size_t trap_opcode_size = 0;
switch (arch.GetMachine()) {
case llvm::Triple::aarch64: {
static const uint8_t g_aarch64_opcode[] = {0x00, 0x00, 0x20, 0xd4};
trap_opcode = g_aarch64_opcode;
trap_opcode_size = sizeof(g_aarch64_opcode);
} break;
// TODO: support big-endian arm and thumb trap codes.
case llvm::Triple::arm: {
// The ARM reference recommends the use of 0xe7fddefe and 0xdefe but the
// linux kernel does otherwise.
static const uint8_t g_arm_breakpoint_opcode[] = {0xf0, 0x01, 0xf0, 0xe7};
static const uint8_t g_thumb_breakpoint_opcode[] = {0x01, 0xde};
lldb::BreakpointLocationSP bp_loc_sp(bp_site->GetOwnerAtIndex(0));
AddressClass addr_class = AddressClass::eUnknown;
if (bp_loc_sp) {
addr_class = bp_loc_sp->GetAddress().GetAddressClass();
if (addr_class == AddressClass::eUnknown &&
(bp_loc_sp->GetAddress().GetFileAddress() & 1))
addr_class = AddressClass::eCodeAlternateISA;
}
if (addr_class == AddressClass::eCodeAlternateISA) {
trap_opcode = g_thumb_breakpoint_opcode;
trap_opcode_size = sizeof(g_thumb_breakpoint_opcode);
} else {
trap_opcode = g_arm_breakpoint_opcode;
trap_opcode_size = sizeof(g_arm_breakpoint_opcode);
}
} break;
case llvm::Triple::mips:
case llvm::Triple::mips64: {
static const uint8_t g_hex_opcode[] = {0x00, 0x00, 0x00, 0x0d};
trap_opcode = g_hex_opcode;
trap_opcode_size = sizeof(g_hex_opcode);
} break;
case llvm::Triple::mipsel:
case llvm::Triple::mips64el: {
static const uint8_t g_hex_opcode[] = {0x0d, 0x00, 0x00, 0x00};
trap_opcode = g_hex_opcode;
trap_opcode_size = sizeof(g_hex_opcode);
} break;
case llvm::Triple::systemz: {
static const uint8_t g_hex_opcode[] = {0x00, 0x01};
trap_opcode = g_hex_opcode;
trap_opcode_size = sizeof(g_hex_opcode);
} break;
case llvm::Triple::hexagon: {
static const uint8_t g_hex_opcode[] = {0x0c, 0xdb, 0x00, 0x54};
trap_opcode = g_hex_opcode;
trap_opcode_size = sizeof(g_hex_opcode);
} break;
case llvm::Triple::ppc:
case llvm::Triple::ppc64: {
static const uint8_t g_ppc_opcode[] = {0x7f, 0xe0, 0x00, 0x08};
trap_opcode = g_ppc_opcode;
trap_opcode_size = sizeof(g_ppc_opcode);
} break;
case llvm::Triple::ppc64le: {
static const uint8_t g_ppc64le_opcode[] = {0x08, 0x00, 0xe0, 0x7f}; // trap
trap_opcode = g_ppc64le_opcode;
trap_opcode_size = sizeof(g_ppc64le_opcode);
} break;
case llvm::Triple::x86:
case llvm::Triple::x86_64: {
static const uint8_t g_i386_opcode[] = {0xCC};
trap_opcode = g_i386_opcode;
trap_opcode_size = sizeof(g_i386_opcode);
} break;
default:
llvm_unreachable(
"Unhandled architecture in Platform::GetSoftwareBreakpointTrapOpcode");
}
assert(bp_site);
if (bp_site->SetTrapOpcode(trap_opcode, trap_opcode_size))
return trap_opcode_size;
return 0;
}
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