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

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//===-- Platform.cpp --------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Target/Platform.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Error.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Host/Host.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
// Use a singleton function for g_local_platform_sp to avoid init
// constructors since LLDB is often part of a shared library
static PlatformSP&
GetDefaultPlatformSP ()
{
static PlatformSP g_default_platform_sp;
return g_default_platform_sp;
}
static Mutex &
GetConnectedPlatformListMutex ()
{
static Mutex g_remote_connected_platforms_mutex (Mutex::eMutexTypeRecursive);
return g_remote_connected_platforms_mutex;
}
static std::vector<PlatformSP> &
GetConnectedPlatformList ()
{
static std::vector<PlatformSP> g_remote_connected_platforms;
return g_remote_connected_platforms;
}
const char *
Platform::GetHostPlatformName ()
{
return "host";
}
//------------------------------------------------------------------
/// 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::GetDefaultPlatform ()
{
return GetDefaultPlatformSP ();
}
void
Platform::SetDefaultPlatform (const lldb::PlatformSP &platform_sp)
{
// The native platform should use its static void Platform::Initialize()
// function to register itself as the native platform.
GetDefaultPlatformSP () = platform_sp;
}
Error
Platform::GetFile (const FileSpec &platform_file,
const UUID *uuid_ptr,
FileSpec &local_file)
{
// Default to the local case
local_file = platform_file;
return Error();
}
Error
Platform::GetSharedModule (const ModuleSpec &module_spec,
ModuleSP &module_sp,
const FileSpecList *module_search_paths_ptr,
ModuleSP *old_module_sp_ptr,
bool *did_create_ptr)
{
// Don't do any path remapping for the default implementation
// of the platform GetSharedModule function, just call through
// to our static ModuleList function. Platform subclasses that
// implement remote debugging, might have a developer kits
// installed that have cached versions of the files for the
// remote target, or might implement a download and cache
// locally implementation.
const bool always_create = false;
return ModuleList::GetSharedModule (module_spec,
module_sp,
module_search_paths_ptr,
old_module_sp_ptr,
did_create_ptr,
always_create);
}
PlatformSP
Platform::Create (const char *platform_name, Error &error)
{
PlatformCreateInstance create_callback = NULL;
lldb::PlatformSP platform_sp;
if (platform_name && platform_name[0])
{
create_callback = PluginManager::GetPlatformCreateCallbackForPluginName (platform_name);
if (create_callback)
platform_sp.reset(create_callback(true, NULL));
else
error.SetErrorStringWithFormat ("unable to find a plug-in for the platform named \"%s\"", platform_name);
}
else
error.SetErrorString ("invalid platform name");
return platform_sp;
}
PlatformSP
Platform::Create (const ArchSpec &arch, Error &error)
{
lldb::PlatformSP platform_sp;
if (arch.IsValid())
{
PlatformCreateInstance create_callback;
for (uint32_t idx = 0; (create_callback = PluginManager::GetPlatformCreateCallbackAtIndex (idx)); ++idx)
{
if (create_callback)
platform_sp.reset(create_callback(false, &arch));
if (platform_sp && platform_sp->IsCompatibleWithArchitecture(arch))
break;
}
}
else
error.SetErrorString ("invalid platform name");
return platform_sp;
}
uint32_t
Platform::GetNumConnectedRemotePlatforms ()
{
Mutex::Locker locker (GetConnectedPlatformListMutex ());
return GetConnectedPlatformList().size();
}
PlatformSP
Platform::GetConnectedRemotePlatformAtIndex (uint32_t idx)
{
PlatformSP platform_sp;
{
Mutex::Locker locker (GetConnectedPlatformListMutex ());
if (idx < GetConnectedPlatformList().size())
platform_sp = GetConnectedPlatformList ()[idx];
}
return platform_sp;
}
//------------------------------------------------------------------
/// 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_remote_url (),
m_name (),
m_major_os_version (UINT32_MAX),
m_minor_os_version (UINT32_MAX),
m_update_os_version (UINT32_MAX),
m_system_arch(),
m_uid_map_mutex (Mutex::eMutexTypeNormal),
m_gid_map_mutex (Mutex::eMutexTypeNormal),
m_uid_map(),
m_gid_map(),
m_max_uid_name_len (0),
m_max_gid_name_len (0)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
if (log)
log->Printf ("%p Platform::Platform()", this);
}
//------------------------------------------------------------------
/// Destructor.
///
/// The destructor is virtual since this class is designed to be
/// inherited from by the plug-in instance.
//------------------------------------------------------------------
Platform::~Platform()
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
if (log)
log->Printf ("%p Platform::~Platform()", this);
}
void
Platform::GetStatus (Stream &strm)
{
uint32_t major = UINT32_MAX;
uint32_t minor = UINT32_MAX;
uint32_t update = UINT32_MAX;
std::string s;
strm.Printf (" Platform: %s\n", GetShortPluginName());
ArchSpec arch (GetSystemArchitecture());
if (arch.IsValid())
{
if (!arch.GetTriple().str().empty())
strm.Printf(" Triple: %s\n", arch.GetTriple().str().c_str());
}
if (GetOSVersion(major, minor, update))
{
strm.Printf("OS Version: %u", major);
if (minor != UINT32_MAX)
strm.Printf(".%u", minor);
if (update != UINT32_MAX)
strm.Printf(".%u", update);
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");
}
}
bool
Platform::GetOSVersion (uint32_t &major,
uint32_t &minor,
uint32_t &update)
{
bool success = m_major_os_version != UINT32_MAX;
if (IsHost())
{
if (!success)
{
// We have a local host platform
success = Host::GetOSVersion (m_major_os_version,
m_minor_os_version,
m_update_os_version);
m_os_version_set_while_connected = success;
}
}
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 (success)
{
// 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)
{
success = GetRemoteOSVersion ();
m_os_version_set_while_connected = success;
}
}
if (success)
{
major = m_major_os_version;
minor = m_minor_os_version;
update = m_update_os_version;
}
return success;
}
bool
Platform::GetOSBuildString (std::string &s)
{
if (IsHost())
return Host::GetOSBuildString (s);
else
return GetRemoteOSBuildString (s);
}
bool
Platform::GetOSKernelDescription (std::string &s)
{
if (IsHost())
return Host::GetOSKernelDescription (s);
else
return GetRemoteOSKernelDescription (s);
}
const char *
Platform::GetName ()
{
const char *name = GetHostname();
if (name == NULL || name[0] == '\0')
name = GetShortPluginName();
return name;
}
const char *
Platform::GetHostname ()
{
if (IsHost())
return "localhost";
if (m_name.empty())
return NULL;
return m_name.c_str();
}
const char *
Platform::GetUserName (uint32_t uid)
{
const char *user_name = GetCachedUserName(uid);
if (user_name)
return user_name;
if (IsHost())
{
std::string name;
if (Host::GetUserName(uid, name))
return SetCachedUserName (uid, name.c_str(), name.size());
}
return NULL;
}
const char *
Platform::GetGroupName (uint32_t gid)
{
const char *group_name = GetCachedGroupName(gid);
if (group_name)
return group_name;
if (IsHost())
{
std::string name;
if (Host::GetGroupName(gid, name))
return SetCachedGroupName (gid, name.c_str(), name.size());
}
return NULL;
}
bool
Platform::SetOSVersion (uint32_t major,
uint32_t minor,
uint32_t update)
{
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 Host::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_major_os_version = major;
m_minor_os_version = minor;
m_update_os_version = update;
return true;
}
}
return false;
}
Error
Platform::ResolveExecutable (const FileSpec &exe_file,
const ArchSpec &exe_arch,
lldb::ModuleSP &exe_module_sp,
const FileSpecList *module_search_paths_ptr)
{
Error error;
if (exe_file.Exists())
{
ModuleSpec module_spec (exe_file, exe_arch);
if (module_spec.GetArchitecture().IsValid())
{
error = ModuleList::GetSharedModule (module_spec,
exe_module_sp,
module_search_paths_ptr,
NULL,
NULL);
}
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
for (uint32_t idx = 0; GetSupportedArchitectureAtIndex (idx, module_spec.GetArchitecture()); ++idx)
{
error = ModuleList::GetSharedModule (module_spec,
exe_module_sp,
module_search_paths_ptr,
NULL,
NULL);
// Did we find an executable using one of the
if (error.Success() && exe_module_sp)
break;
}
}
}
else
{
error.SetErrorStringWithFormat ("'%s%s%s' does not exist",
exe_file.GetDirectory().AsCString(""),
exe_file.GetDirectory() ? "/" : "",
exe_file.GetFilename().AsCString(""));
}
return error;
}
bool
Platform::ResolveRemotePath (const FileSpec &platform_path,
FileSpec &resolved_platform_path)
{
resolved_platform_path = platform_path;
return resolved_platform_path.ResolvePath();
}
const ArchSpec &
Platform::GetSystemArchitecture()
{
if (IsHost())
{
if (!m_system_arch.IsValid())
{
// We have a local host platform
m_system_arch = Host::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;
}
Error
Platform::ConnectRemote (Args& args)
{
Error error;
if (IsHost())
error.SetErrorStringWithFormat ("The currently selected platform (%s) is the host platform and is always connected.", GetShortPluginName());
else
error.SetErrorStringWithFormat ("Platform::ConnectRemote() is not supported by %s", GetShortPluginName());
return error;
}
Error
Platform::DisconnectRemote ()
{
Error error;
if (IsHost())
error.SetErrorStringWithFormat ("The currently selected platform (%s) is the host platform and is always connected.", GetShortPluginName());
else
error.SetErrorStringWithFormat ("Platform::DisconnectRemote() is not supported by %s", GetShortPluginName());
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;
}
Error
Platform::LaunchProcess (ProcessLaunchInfo &launch_info)
{
Error error;
// 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;
if (!launch_info.ConvertArgumentsForLaunchingInShell (error, is_localhost))
return error;
}
error = Host::LaunchProcess (launch_info);
}
else
error.SetErrorString ("base lldb_private::Platform class can't launch remote processes");
return error;
}
lldb::ProcessSP
Platform::DebugProcess (ProcessLaunchInfo &launch_info,
Debugger &debugger,
Target *target, // Can be NULL, if NULL create a new target, else use existing one
Listener &listener,
Error &error)
{
ProcessSP process_sp;
// Make sure we stop at the entry point
launch_info.GetFlags ().Set (eLaunchFlagDebug);
error = LaunchProcess (launch_info);
if (error.Success())
{
if (launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID)
{
ProcessAttachInfo attach_info (launch_info);
process_sp = Attach (attach_info, debugger, target, listener, error);
if (process_sp)
{
// 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 != lldb_utility::PseudoTerminal::invalid_fd)
{
process_sp->SetSTDIOFileDescriptor(pty_fd);
}
}
}
}
return process_sp;
}
lldb::PlatformSP
Platform::GetPlatformForArchitecture (const ArchSpec &arch)
{
lldb::PlatformSP platform_sp;
Error error;
if (arch.IsValid())
platform_sp = Platform::Create (arch, error);
return platform_sp;
}
//------------------------------------------------------------------
/// Lets a platform answer if it is compatible with a given
/// architecture and the target triple contained within.
//------------------------------------------------------------------
bool
Platform::IsCompatibleWithArchitecture (const ArchSpec &arch)
{
// If the architecture is invalid, we must answer true...
if (!arch.IsValid())
return true;
ArchSpec platform_arch;
for (uint32_t arch_idx=0; GetSupportedArchitectureAtIndex (arch_idx, platform_arch); ++arch_idx)
{
if (arch == platform_arch)
return true;
}
return false;
}
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