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llvm-project/lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp

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//===-- PlatformPOSIX.cpp ---------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "PlatformPOSIX.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Expression/UserExpression.h"
#include "lldb/Host/File.h"
#include "lldb/Host/FileCache.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Target/DynamicLoader.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/ProcessLaunchInfo.h"
#include "lldb/Target/Thread.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/StreamString.h"
using namespace lldb;
using namespace lldb_private;
//------------------------------------------------------------------
/// Default Constructor
//------------------------------------------------------------------
PlatformPOSIX::PlatformPOSIX(bool is_host)
: Platform(is_host), // This is the local host platform
m_option_group_platform_rsync(new OptionGroupPlatformRSync()),
m_option_group_platform_ssh(new OptionGroupPlatformSSH()),
m_option_group_platform_caching(new OptionGroupPlatformCaching()),
m_remote_platform_sp() {}
//------------------------------------------------------------------
/// Destructor.
///
/// The destructor is virtual since this class is designed to be
/// inherited from by the plug-in instance.
//------------------------------------------------------------------
PlatformPOSIX::~PlatformPOSIX() {}
bool PlatformPOSIX::GetModuleSpec(const FileSpec &module_file_spec,
const ArchSpec &arch,
ModuleSpec &module_spec) {
if (m_remote_platform_sp)
return m_remote_platform_sp->GetModuleSpec(module_file_spec, arch,
module_spec);
return Platform::GetModuleSpec(module_file_spec, arch, module_spec);
}
lldb_private::OptionGroupOptions *PlatformPOSIX::GetConnectionOptions(
lldb_private::CommandInterpreter &interpreter) {
auto iter = m_options.find(&interpreter), end = m_options.end();
if (iter == end) {
std::unique_ptr<lldb_private::OptionGroupOptions> options(
new OptionGroupOptions());
options->Append(m_option_group_platform_rsync.get());
options->Append(m_option_group_platform_ssh.get());
options->Append(m_option_group_platform_caching.get());
m_options[&interpreter] = std::move(options);
}
return m_options.at(&interpreter).get();
}
bool PlatformPOSIX::IsConnected() const {
if (IsHost())
return true;
else if (m_remote_platform_sp)
return m_remote_platform_sp->IsConnected();
return false;
}
lldb_private::Status PlatformPOSIX::RunShellCommand(
const char *command, // Shouldn't be NULL
const FileSpec &
working_dir, // Pass empty FileSpec to use the current working directory
int *status_ptr, // Pass NULL if you don't want the process exit status
int *signo_ptr, // Pass NULL if you don't want the signal that caused the
// process to exit
std::string
*command_output, // Pass NULL if you don't want the command output
uint32_t
timeout_sec) // Timeout in seconds to wait for shell program to finish
{
if (IsHost())
return Host::RunShellCommand(command, working_dir, status_ptr, signo_ptr,
command_output, timeout_sec);
else {
if (m_remote_platform_sp)
return m_remote_platform_sp->RunShellCommand(command, working_dir,
status_ptr, signo_ptr,
command_output, timeout_sec);
else
return Status("unable to run a remote command without a platform");
}
}
Status
PlatformPOSIX::ResolveExecutable(const ModuleSpec &module_spec,
lldb::ModuleSP &exe_module_sp,
const FileSpecList *module_search_paths_ptr) {
Status error;
// Nothing special to do here, just use the actual file and architecture
char exe_path[PATH_MAX];
ModuleSpec resolved_module_spec(module_spec);
if (IsHost()) {
// If we have "ls" as the exe_file, resolve the executable location based on
// the current path variables
if (!resolved_module_spec.GetFileSpec().Exists()) {
resolved_module_spec.GetFileSpec().GetPath(exe_path, sizeof(exe_path));
resolved_module_spec.GetFileSpec().SetFile(exe_path, true);
}
if (!resolved_module_spec.GetFileSpec().Exists())
resolved_module_spec.GetFileSpec().ResolveExecutableLocation();
// Resolve any executable within a bundle on MacOSX
Host::ResolveExecutableInBundle(resolved_module_spec.GetFileSpec());
if (resolved_module_spec.GetFileSpec().Exists())
error.Clear();
else {
const uint32_t permissions =
resolved_module_spec.GetFileSpec().GetPermissions();
if (permissions && (permissions & eFilePermissionsEveryoneR) == 0)
error.SetErrorStringWithFormat(
"executable '%s' is not readable",
resolved_module_spec.GetFileSpec().GetPath().c_str());
else
error.SetErrorStringWithFormat(
"unable to find executable for '%s'",
resolved_module_spec.GetFileSpec().GetPath().c_str());
}
} else {
if (m_remote_platform_sp) {
error =
GetCachedExecutable(resolved_module_spec, exe_module_sp,
module_search_paths_ptr, *m_remote_platform_sp);
} else {
// We may connect to a process and use the provided executable (Don't use
// local $PATH).
// Resolve any executable within a bundle on MacOSX
Host::ResolveExecutableInBundle(resolved_module_spec.GetFileSpec());
if (resolved_module_spec.GetFileSpec().Exists())
error.Clear();
else
error.SetErrorStringWithFormat("the platform is not currently "
"connected, and '%s' doesn't exist in "
"the system root.",
exe_path);
}
}
if (error.Success()) {
if (resolved_module_spec.GetArchitecture().IsValid()) {
error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
module_search_paths_ptr, nullptr, nullptr);
if (error.Fail()) {
// If we failed, it may be because the vendor and os aren't known. If
// that is the case, try setting them to the host architecture and give
// it another try.
llvm::Triple &module_triple =
resolved_module_spec.GetArchitecture().GetTriple();
bool is_vendor_specified =
(module_triple.getVendor() != llvm::Triple::UnknownVendor);
bool is_os_specified =
(module_triple.getOS() != llvm::Triple::UnknownOS);
if (!is_vendor_specified || !is_os_specified) {
const llvm::Triple &host_triple =
HostInfo::GetArchitecture(HostInfo::eArchKindDefault).GetTriple();
if (!is_vendor_specified)
module_triple.setVendorName(host_triple.getVendorName());
if (!is_os_specified)
module_triple.setOSName(host_triple.getOSName());
error = ModuleList::GetSharedModule(resolved_module_spec,
exe_module_sp, module_search_paths_ptr, nullptr, nullptr);
}
}
// TODO find out why exe_module_sp might be NULL
if (error.Fail() || !exe_module_sp || !exe_module_sp->GetObjectFile()) {
exe_module_sp.reset();
error.SetErrorStringWithFormat(
"'%s' doesn't contain the architecture %s",
resolved_module_spec.GetFileSpec().GetPath().c_str(),
resolved_module_spec.GetArchitecture().GetArchitectureName());
}
} 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
StreamString arch_names;
for (uint32_t idx = 0; GetSupportedArchitectureAtIndex(
idx, resolved_module_spec.GetArchitecture());
++idx) {
error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
module_search_paths_ptr, nullptr, nullptr);
// Did we find an executable using one of the
if (error.Success()) {
if (exe_module_sp && exe_module_sp->GetObjectFile())
break;
else
error.SetErrorToGenericError();
}
if (idx > 0)
arch_names.PutCString(", ");
arch_names.PutCString(
resolved_module_spec.GetArchitecture().GetArchitectureName());
}
if (error.Fail() || !exe_module_sp) {
if (resolved_module_spec.GetFileSpec().Readable()) {
error.SetErrorStringWithFormat(
"'%s' doesn't contain any '%s' platform architectures: %s",
resolved_module_spec.GetFileSpec().GetPath().c_str(),
GetPluginName().GetCString(), arch_names.GetData());
} else {
error.SetErrorStringWithFormat(
"'%s' is not readable",
resolved_module_spec.GetFileSpec().GetPath().c_str());
}
}
}
}
return error;
}
Status PlatformPOSIX::GetFileWithUUID(const FileSpec &platform_file,
const UUID *uuid_ptr,
FileSpec &local_file) {
if (IsRemote() && m_remote_platform_sp)
return m_remote_platform_sp->GetFileWithUUID(platform_file, uuid_ptr,
local_file);
// Default to the local case
local_file = platform_file;
return Status();
}
bool PlatformPOSIX::GetProcessInfo(lldb::pid_t pid,
ProcessInstanceInfo &process_info) {
if (IsHost())
return Platform::GetProcessInfo(pid, process_info);
if (m_remote_platform_sp)
return m_remote_platform_sp->GetProcessInfo(pid, process_info);
return false;
}
uint32_t
PlatformPOSIX::FindProcesses(const ProcessInstanceInfoMatch &match_info,
ProcessInstanceInfoList &process_infos) {
if (IsHost())
return Platform::FindProcesses(match_info, process_infos);
if (m_remote_platform_sp)
return
m_remote_platform_sp->FindProcesses(match_info, process_infos);
return 0;
}
Status PlatformPOSIX::MakeDirectory(const FileSpec &file_spec,
uint32_t file_permissions) {
if (m_remote_platform_sp)
return m_remote_platform_sp->MakeDirectory(file_spec, file_permissions);
else
return Platform::MakeDirectory(file_spec, file_permissions);
}
Status PlatformPOSIX::GetFilePermissions(const FileSpec &file_spec,
uint32_t &file_permissions) {
if (m_remote_platform_sp)
return m_remote_platform_sp->GetFilePermissions(file_spec,
file_permissions);
else
return Platform::GetFilePermissions(file_spec, file_permissions);
}
Status PlatformPOSIX::SetFilePermissions(const FileSpec &file_spec,
uint32_t file_permissions) {
if (m_remote_platform_sp)
return m_remote_platform_sp->SetFilePermissions(file_spec,
file_permissions);
else
return Platform::SetFilePermissions(file_spec, file_permissions);
}
lldb::user_id_t PlatformPOSIX::OpenFile(const FileSpec &file_spec,
uint32_t flags, uint32_t mode,
Status &error) {
if (IsHost())
return FileCache::GetInstance().OpenFile(file_spec, flags, mode, error);
else if (m_remote_platform_sp)
return m_remote_platform_sp->OpenFile(file_spec, flags, mode, error);
else
return Platform::OpenFile(file_spec, flags, mode, error);
}
bool PlatformPOSIX::CloseFile(lldb::user_id_t fd, Status &error) {
if (IsHost())
return FileCache::GetInstance().CloseFile(fd, error);
else if (m_remote_platform_sp)
return m_remote_platform_sp->CloseFile(fd, error);
else
return Platform::CloseFile(fd, error);
}
uint64_t PlatformPOSIX::ReadFile(lldb::user_id_t fd, uint64_t offset, void *dst,
uint64_t dst_len, Status &error) {
if (IsHost())
return FileCache::GetInstance().ReadFile(fd, offset, dst, dst_len, error);
else if (m_remote_platform_sp)
return m_remote_platform_sp->ReadFile(fd, offset, dst, dst_len, error);
else
return Platform::ReadFile(fd, offset, dst, dst_len, error);
}
uint64_t PlatformPOSIX::WriteFile(lldb::user_id_t fd, uint64_t offset,
const void *src, uint64_t src_len,
Status &error) {
if (IsHost())
return FileCache::GetInstance().WriteFile(fd, offset, src, src_len, error);
else if (m_remote_platform_sp)
return m_remote_platform_sp->WriteFile(fd, offset, src, src_len, error);
else
return Platform::WriteFile(fd, offset, src, src_len, error);
}
static uint32_t chown_file(Platform *platform, const char *path,
uint32_t uid = UINT32_MAX,
uint32_t gid = UINT32_MAX) {
if (!platform || !path || *path == 0)
return UINT32_MAX;
if (uid == UINT32_MAX && gid == UINT32_MAX)
return 0; // pretend I did chown correctly - actually I just didn't care
StreamString command;
command.PutCString("chown ");
if (uid != UINT32_MAX)
command.Printf("%d", uid);
if (gid != UINT32_MAX)
command.Printf(":%d", gid);
command.Printf("%s", path);
int status;
platform->RunShellCommand(command.GetData(), NULL, &status, NULL, NULL, 10);
return status;
}
lldb_private::Status
PlatformPOSIX::PutFile(const lldb_private::FileSpec &source,
const lldb_private::FileSpec &destination, uint32_t uid,
uint32_t gid) {
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (IsHost()) {
if (FileSpec::Equal(source, destination, true))
return Status();
// cp src dst
// chown uid:gid dst
std::string src_path(source.GetPath());
if (src_path.empty())
return Status("unable to get file path for source");
std::string dst_path(destination.GetPath());
if (dst_path.empty())
return Status("unable to get file path for destination");
StreamString command;
command.Printf("cp %s %s", src_path.c_str(), dst_path.c_str());
int status;
RunShellCommand(command.GetData(), NULL, &status, NULL, NULL, 10);
if (status != 0)
return Status("unable to perform copy");
if (uid == UINT32_MAX && gid == UINT32_MAX)
return Status();
if (chown_file(this, dst_path.c_str(), uid, gid) != 0)
return Status("unable to perform chown");
return Status();
} else if (m_remote_platform_sp) {
if (GetSupportsRSync()) {
std::string src_path(source.GetPath());
if (src_path.empty())
return Status("unable to get file path for source");
std::string dst_path(destination.GetPath());
if (dst_path.empty())
return Status("unable to get file path for destination");
StreamString command;
if (GetIgnoresRemoteHostname()) {
if (!GetRSyncPrefix())
command.Printf("rsync %s %s %s", GetRSyncOpts(), src_path.c_str(),
dst_path.c_str());
else
command.Printf("rsync %s %s %s%s", GetRSyncOpts(), src_path.c_str(),
GetRSyncPrefix(), dst_path.c_str());
} else
command.Printf("rsync %s %s %s:%s", GetRSyncOpts(), src_path.c_str(),
GetHostname(), dst_path.c_str());
if (log)
log->Printf("[PutFile] Running command: %s\n", command.GetData());
int retcode;
Host::RunShellCommand(command.GetData(), NULL, &retcode, NULL, NULL, 60);
if (retcode == 0) {
// Don't chown a local file for a remote system
// if (chown_file(this,dst_path.c_str(),uid,gid) != 0)
// return Status("unable to perform chown");
return Status();
}
// if we are still here rsync has failed - let's try the slow way before
// giving up
}
}
return Platform::PutFile(source, destination, uid, gid);
}
lldb::user_id_t PlatformPOSIX::GetFileSize(const FileSpec &file_spec) {
if (IsHost()) {
uint64_t Size;
if (llvm::sys::fs::file_size(file_spec.GetPath(), Size))
return 0;
return Size;
} else if (m_remote_platform_sp)
return m_remote_platform_sp->GetFileSize(file_spec);
else
return Platform::GetFileSize(file_spec);
}
Status PlatformPOSIX::CreateSymlink(const FileSpec &src, const FileSpec &dst) {
if (IsHost())
return FileSystem::Symlink(src, dst);
else if (m_remote_platform_sp)
return m_remote_platform_sp->CreateSymlink(src, dst);
else
return Platform::CreateSymlink(src, dst);
}
bool PlatformPOSIX::GetFileExists(const FileSpec &file_spec) {
if (IsHost())
return file_spec.Exists();
else if (m_remote_platform_sp)
return m_remote_platform_sp->GetFileExists(file_spec);
else
return Platform::GetFileExists(file_spec);
}
Status PlatformPOSIX::Unlink(const FileSpec &file_spec) {
if (IsHost())
return llvm::sys::fs::remove(file_spec.GetPath());
else if (m_remote_platform_sp)
return m_remote_platform_sp->Unlink(file_spec);
else
return Platform::Unlink(file_spec);
}
lldb_private::Status PlatformPOSIX::GetFile(
const lldb_private::FileSpec &source, // remote file path
const lldb_private::FileSpec &destination) // local file path
{
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM));
// Check the args, first.
std::string src_path(source.GetPath());
if (src_path.empty())
return Status("unable to get file path for source");
std::string dst_path(destination.GetPath());
if (dst_path.empty())
return Status("unable to get file path for destination");
if (IsHost()) {
if (FileSpec::Equal(source, destination, true))
return Status("local scenario->source and destination are the same file "
"path: no operation performed");
// cp src dst
StreamString cp_command;
cp_command.Printf("cp %s %s", src_path.c_str(), dst_path.c_str());
int status;
RunShellCommand(cp_command.GetData(), NULL, &status, NULL, NULL, 10);
if (status != 0)
return Status("unable to perform copy");
return Status();
} else if (m_remote_platform_sp) {
if (GetSupportsRSync()) {
StreamString command;
if (GetIgnoresRemoteHostname()) {
if (!GetRSyncPrefix())
command.Printf("rsync %s %s %s", GetRSyncOpts(), src_path.c_str(),
dst_path.c_str());
else
command.Printf("rsync %s %s%s %s", GetRSyncOpts(), GetRSyncPrefix(),
src_path.c_str(), dst_path.c_str());
} else
command.Printf("rsync %s %s:%s %s", GetRSyncOpts(),
m_remote_platform_sp->GetHostname(), src_path.c_str(),
dst_path.c_str());
if (log)
log->Printf("[GetFile] Running command: %s\n", command.GetData());
int retcode;
Host::RunShellCommand(command.GetData(), NULL, &retcode, NULL, NULL, 60);
if (retcode == 0)
return Status();
// If we are here, rsync has failed - let's try the slow way before giving
// up
}
// open src and dst
// read/write, read/write, read/write, ...
// close src
// close dst
if (log)
log->Printf("[GetFile] Using block by block transfer....\n");
Status error;
user_id_t fd_src = OpenFile(source, File::eOpenOptionRead,
lldb::eFilePermissionsFileDefault, error);
if (fd_src == UINT64_MAX)
return Status("unable to open source file");
uint32_t permissions = 0;
error = GetFilePermissions(source, permissions);
if (permissions == 0)
permissions = lldb::eFilePermissionsFileDefault;
user_id_t fd_dst = FileCache::GetInstance().OpenFile(
destination, File::eOpenOptionCanCreate | File::eOpenOptionWrite |
File::eOpenOptionTruncate,
permissions, error);
if (fd_dst == UINT64_MAX) {
if (error.Success())
error.SetErrorString("unable to open destination file");
}
if (error.Success()) {
lldb::DataBufferSP buffer_sp(new DataBufferHeap(1024, 0));
uint64_t offset = 0;
error.Clear();
while (error.Success()) {
const uint64_t n_read = ReadFile(fd_src, offset, buffer_sp->GetBytes(),
buffer_sp->GetByteSize(), error);
if (error.Fail())
break;
if (n_read == 0)
break;
if (FileCache::GetInstance().WriteFile(fd_dst, offset,
buffer_sp->GetBytes(), n_read,
error) != n_read) {
if (!error.Fail())
error.SetErrorString("unable to write to destination file");
break;
}
offset += n_read;
}
}
// Ignore the close error of src.
if (fd_src != UINT64_MAX)
CloseFile(fd_src, error);
// And close the dst file descriptot.
if (fd_dst != UINT64_MAX &&
!FileCache::GetInstance().CloseFile(fd_dst, error)) {
if (!error.Fail())
error.SetErrorString("unable to close destination file");
}
return error;
}
return Platform::GetFile(source, destination);
}
std::string PlatformPOSIX::GetPlatformSpecificConnectionInformation() {
StreamString stream;
if (GetSupportsRSync()) {
stream.PutCString("rsync");
if ((GetRSyncOpts() && *GetRSyncOpts()) ||
(GetRSyncPrefix() && *GetRSyncPrefix()) || GetIgnoresRemoteHostname()) {
stream.Printf(", options: ");
if (GetRSyncOpts() && *GetRSyncOpts())
stream.Printf("'%s' ", GetRSyncOpts());
stream.Printf(", prefix: ");
if (GetRSyncPrefix() && *GetRSyncPrefix())
stream.Printf("'%s' ", GetRSyncPrefix());
if (GetIgnoresRemoteHostname())
stream.Printf("ignore remote-hostname ");
}
}
if (GetSupportsSSH()) {
stream.PutCString("ssh");
if (GetSSHOpts() && *GetSSHOpts())
stream.Printf(", options: '%s' ", GetSSHOpts());
}
if (GetLocalCacheDirectory() && *GetLocalCacheDirectory())
stream.Printf("cache dir: %s", GetLocalCacheDirectory());
if (stream.GetSize())
return stream.GetString();
else
return "";
}
bool PlatformPOSIX::CalculateMD5(const FileSpec &file_spec, uint64_t &low,
uint64_t &high) {
if (IsHost())
return Platform::CalculateMD5(file_spec, low, high);
if (m_remote_platform_sp)
return m_remote_platform_sp->CalculateMD5(file_spec, low, high);
return false;
}
const lldb::UnixSignalsSP &PlatformPOSIX::GetRemoteUnixSignals() {
if (IsRemote() && m_remote_platform_sp)
return m_remote_platform_sp->GetRemoteUnixSignals();
return Platform::GetRemoteUnixSignals();
}
FileSpec PlatformPOSIX::GetRemoteWorkingDirectory() {
if (IsRemote() && m_remote_platform_sp)
return m_remote_platform_sp->GetRemoteWorkingDirectory();
else
return Platform::GetRemoteWorkingDirectory();
}
bool PlatformPOSIX::SetRemoteWorkingDirectory(const FileSpec &working_dir) {
if (IsRemote() && m_remote_platform_sp)
return m_remote_platform_sp->SetRemoteWorkingDirectory(working_dir);
else
return Platform::SetRemoteWorkingDirectory(working_dir);
}
bool PlatformPOSIX::GetRemoteOSVersion() {
if (m_remote_platform_sp)
return m_remote_platform_sp->GetOSVersion(
m_major_os_version, m_minor_os_version, m_update_os_version);
return false;
}
bool PlatformPOSIX::GetRemoteOSBuildString(std::string &s) {
if (m_remote_platform_sp)
return m_remote_platform_sp->GetRemoteOSBuildString(s);
s.clear();
return false;
}
size_t PlatformPOSIX::GetEnvironment(StringList &env) {
if (IsRemote()) {
if (m_remote_platform_sp)
return m_remote_platform_sp->GetEnvironment(env);
return 0;
}
return Host::GetEnvironment(env);
}
bool PlatformPOSIX::GetRemoteOSKernelDescription(std::string &s) {
if (m_remote_platform_sp)
return m_remote_platform_sp->GetRemoteOSKernelDescription(s);
s.clear();
return false;
}
// Remote Platform subclasses need to override this function
ArchSpec PlatformPOSIX::GetRemoteSystemArchitecture() {
if (m_remote_platform_sp)
return m_remote_platform_sp->GetRemoteSystemArchitecture();
return ArchSpec();
}
const char *PlatformPOSIX::GetHostname() {
if (IsHost())
return Platform::GetHostname();
if (m_remote_platform_sp)
return m_remote_platform_sp->GetHostname();
return NULL;
}
const char *PlatformPOSIX::GetUserName(uint32_t uid) {
// Check the cache in Platform in case we have already looked this uid up
const char *user_name = Platform::GetUserName(uid);
if (user_name)
return user_name;
if (IsRemote() && m_remote_platform_sp)
return m_remote_platform_sp->GetUserName(uid);
return NULL;
}
const char *PlatformPOSIX::GetGroupName(uint32_t gid) {
const char *group_name = Platform::GetGroupName(gid);
if (group_name)
return group_name;
if (IsRemote() && m_remote_platform_sp)
return m_remote_platform_sp->GetGroupName(gid);
return NULL;
}
Status PlatformPOSIX::ConnectRemote(Args &args) {
Status error;
if (IsHost()) {
error.SetErrorStringWithFormat(
"can't connect to the host platform '%s', always connected",
GetPluginName().GetCString());
} else {
if (!m_remote_platform_sp)
m_remote_platform_sp =
Platform::Create(ConstString("remote-gdb-server"), error);
if (m_remote_platform_sp && error.Success())
error = m_remote_platform_sp->ConnectRemote(args);
else
error.SetErrorString("failed to create a 'remote-gdb-server' platform");
if (error.Fail())
m_remote_platform_sp.reset();
}
if (error.Success() && m_remote_platform_sp) {
if (m_option_group_platform_rsync.get() &&
m_option_group_platform_ssh.get() &&
m_option_group_platform_caching.get()) {
if (m_option_group_platform_rsync->m_rsync) {
SetSupportsRSync(true);
SetRSyncOpts(m_option_group_platform_rsync->m_rsync_opts.c_str());
SetRSyncPrefix(m_option_group_platform_rsync->m_rsync_prefix.c_str());
SetIgnoresRemoteHostname(
m_option_group_platform_rsync->m_ignores_remote_hostname);
}
if (m_option_group_platform_ssh->m_ssh) {
SetSupportsSSH(true);
SetSSHOpts(m_option_group_platform_ssh->m_ssh_opts.c_str());
}
SetLocalCacheDirectory(
m_option_group_platform_caching->m_cache_dir.c_str());
}
}
return error;
}
Status PlatformPOSIX::DisconnectRemote() {
Status error;
if (IsHost()) {
error.SetErrorStringWithFormat(
"can't disconnect from the host platform '%s', always connected",
GetPluginName().GetCString());
} else {
if (m_remote_platform_sp)
error = m_remote_platform_sp->DisconnectRemote();
else
error.SetErrorString("the platform is not currently connected");
}
return error;
}
Status PlatformPOSIX::LaunchProcess(ProcessLaunchInfo &launch_info) {
Status error;
if (IsHost()) {
error = Platform::LaunchProcess(launch_info);
} else {
if (m_remote_platform_sp)
error = m_remote_platform_sp->LaunchProcess(launch_info);
else
error.SetErrorString("the platform is not currently connected");
}
return error;
}
lldb_private::Status PlatformPOSIX::KillProcess(const lldb::pid_t pid) {
if (IsHost())
return Platform::KillProcess(pid);
if (m_remote_platform_sp)
return m_remote_platform_sp->KillProcess(pid);
return Status("the platform is not currently connected");
}
lldb::ProcessSP PlatformPOSIX::Attach(ProcessAttachInfo &attach_info,
Debugger &debugger, Target *target,
Status &error) {
lldb::ProcessSP process_sp;
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (IsHost()) {
if (target == NULL) {
TargetSP new_target_sp;
error = debugger.GetTargetList().CreateTarget(debugger, "", "", false,
NULL, new_target_sp);
target = new_target_sp.get();
if (log)
log->Printf("PlatformPOSIX::%s created new target", __FUNCTION__);
} else {
error.Clear();
if (log)
log->Printf("PlatformPOSIX::%s target already existed, setting target",
__FUNCTION__);
}
if (target && error.Success()) {
debugger.GetTargetList().SetSelectedTarget(target);
if (log) {
ModuleSP exe_module_sp = target->GetExecutableModule();
log->Printf("PlatformPOSIX::%s set selected target to %p %s",
__FUNCTION__, (void *)target,
exe_module_sp
? exe_module_sp->GetFileSpec().GetPath().c_str()
: "<null>");
}
process_sp =
target->CreateProcess(attach_info.GetListenerForProcess(debugger),
attach_info.GetProcessPluginName(), NULL);
if (process_sp) {
ListenerSP listener_sp = attach_info.GetHijackListener();
if (listener_sp == nullptr) {
listener_sp =
Listener::MakeListener("lldb.PlatformPOSIX.attach.hijack");
attach_info.SetHijackListener(listener_sp);
}
process_sp->HijackProcessEvents(listener_sp);
error = process_sp->Attach(attach_info);
}
}
} else {
if (m_remote_platform_sp)
process_sp =
m_remote_platform_sp->Attach(attach_info, debugger, target, error);
else
error.SetErrorString("the platform is not currently connected");
}
return process_sp;
}
lldb::ProcessSP
PlatformPOSIX::DebugProcess(ProcessLaunchInfo &launch_info, Debugger &debugger,
Target *target, // Can be NULL, if NULL create a new
// target, else use existing one
Status &error) {
ProcessSP process_sp;
if (IsHost()) {
// We are going to hand this process off to debugserver which will be in
// charge of setting the exit status.
// We still need to reap it from lldb but if we let the monitor thread also
// set the exit status, we set up a
// race between debugserver & us for who will find out about the debugged
// process's death.
launch_info.GetFlags().Set(eLaunchFlagDontSetExitStatus);
process_sp = Platform::DebugProcess(launch_info, debugger, target, error);
} else {
if (m_remote_platform_sp)
process_sp = m_remote_platform_sp->DebugProcess(launch_info, debugger,
target, error);
else
error.SetErrorString("the platform is not currently connected");
}
return process_sp;
}
void PlatformPOSIX::CalculateTrapHandlerSymbolNames() {
m_trap_handlers.push_back(ConstString("_sigtramp"));
}
Status PlatformPOSIX::EvaluateLibdlExpression(
lldb_private::Process *process, const char *expr_cstr,
llvm::StringRef expr_prefix, lldb::ValueObjectSP &result_valobj_sp) {
DynamicLoader *loader = process->GetDynamicLoader();
if (loader) {
Status error = loader->CanLoadImage();
if (error.Fail())
return error;
}
ThreadSP thread_sp(process->GetThreadList().GetExpressionExecutionThread());
if (!thread_sp)
return Status("Selected thread isn't valid");
StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0));
if (!frame_sp)
return Status("Frame 0 isn't valid");
ExecutionContext exe_ctx;
frame_sp->CalculateExecutionContext(exe_ctx);
EvaluateExpressionOptions expr_options;
expr_options.SetUnwindOnError(true);
expr_options.SetIgnoreBreakpoints(true);
expr_options.SetExecutionPolicy(eExecutionPolicyAlways);
expr_options.SetLanguage(eLanguageTypeC_plus_plus);
expr_options.SetTrapExceptions(false); // dlopen can't throw exceptions, so
// don't do the work to trap them.
expr_options.SetTimeout(std::chrono::seconds(2));
Status expr_error;
ExpressionResults result =
UserExpression::Evaluate(exe_ctx, expr_options, expr_cstr, expr_prefix,
result_valobj_sp, expr_error);
if (result != eExpressionCompleted)
return expr_error;
if (result_valobj_sp->GetError().Fail())
return result_valobj_sp->GetError();
return Status();
}
uint32_t PlatformPOSIX::DoLoadImage(lldb_private::Process *process,
const lldb_private::FileSpec &remote_file,
lldb_private::Status &error) {
char path[PATH_MAX];
remote_file.GetPath(path, sizeof(path));
StreamString expr;
expr.Printf(R"(
struct __lldb_dlopen_result { void *image_ptr; const char *error_str; } the_result;
the_result.image_ptr = dlopen ("%s", 2);
if (the_result.image_ptr == (void *) 0x0)
{
the_result.error_str = dlerror();
}
else
{
the_result.error_str = (const char *) 0x0;
}
the_result;
)",
path);
llvm::StringRef prefix = GetLibdlFunctionDeclarations();
lldb::ValueObjectSP result_valobj_sp;
error = EvaluateLibdlExpression(process, expr.GetData(), prefix,
result_valobj_sp);
if (error.Fail())
return LLDB_INVALID_IMAGE_TOKEN;
error = result_valobj_sp->GetError();
if (error.Fail())
return LLDB_INVALID_IMAGE_TOKEN;
Scalar scalar;
ValueObjectSP image_ptr_sp = result_valobj_sp->GetChildAtIndex(0, true);
if (!image_ptr_sp || !image_ptr_sp->ResolveValue(scalar)) {
error.SetErrorStringWithFormat("unable to load '%s'", path);
return LLDB_INVALID_IMAGE_TOKEN;
}
addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS);
if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS)
return process->AddImageToken(image_ptr);
if (image_ptr == 0) {
ValueObjectSP error_str_sp = result_valobj_sp->GetChildAtIndex(1, true);
if (error_str_sp) {
DataBufferSP buffer_sp(new DataBufferHeap(10240, 0));
size_t num_chars =
error_str_sp->ReadPointedString(buffer_sp, error, 10240).first;
if (error.Success() && num_chars > 0)
error.SetErrorStringWithFormat("dlopen error: %s",
buffer_sp->GetBytes());
else
error.SetErrorStringWithFormat("dlopen failed for unknown reasons.");
return LLDB_INVALID_IMAGE_TOKEN;
}
}
error.SetErrorStringWithFormat("unable to load '%s'", path);
return LLDB_INVALID_IMAGE_TOKEN;
}
Status PlatformPOSIX::UnloadImage(lldb_private::Process *process,
uint32_t image_token) {
const addr_t image_addr = process->GetImagePtrFromToken(image_token);
if (image_addr == LLDB_INVALID_ADDRESS)
return Status("Invalid image token");
StreamString expr;
expr.Printf("dlclose((void *)0x%" PRIx64 ")", image_addr);
llvm::StringRef prefix = GetLibdlFunctionDeclarations();
lldb::ValueObjectSP result_valobj_sp;
Status error = EvaluateLibdlExpression(process, expr.GetData(), prefix,
result_valobj_sp);
if (error.Fail())
return error;
if (result_valobj_sp->GetError().Fail())
return result_valobj_sp->GetError();
Scalar scalar;
if (result_valobj_sp->ResolveValue(scalar)) {
if (scalar.UInt(1))
return Status("expression failed: \"%s\"", expr.GetData());
process->ResetImageToken(image_token);
}
return Status();
}
lldb::ProcessSP PlatformPOSIX::ConnectProcess(llvm::StringRef connect_url,
llvm::StringRef plugin_name,
lldb_private::Debugger &debugger,
lldb_private::Target *target,
lldb_private::Status &error) {
if (m_remote_platform_sp)
return m_remote_platform_sp->ConnectProcess(connect_url, plugin_name,
debugger, target, error);
return Platform::ConnectProcess(connect_url, plugin_name, debugger, target,
error);
}
llvm::StringRef PlatformPOSIX::GetLibdlFunctionDeclarations() {
return R"(
extern "C" void* dlopen(const char*, int);
extern "C" void* dlsym(void*, const char*);
extern "C" int dlclose(void*);
extern "C" char* dlerror(void);
)";
}
size_t PlatformPOSIX::ConnectToWaitingProcesses(Debugger &debugger,
Status &error) {
if (m_remote_platform_sp)
return m_remote_platform_sp->ConnectToWaitingProcesses(debugger, error);
return Platform::ConnectToWaitingProcesses(debugger, error);
}
ConstString PlatformPOSIX::GetFullNameForDylib(ConstString basename) {
if (basename.IsEmpty())
return basename;
StreamString stream;
stream.Printf("lib%s.so", basename.GetCString());
return ConstString(stream.GetString());
}
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