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2bd636f589302ec937c732d3761325ecc2f88dd2
clang-p2996/lldb/source/Target/Platform.cpp
Greg Clayton b9a01b3990 Made a ModuleSpec class in Module.h which can specify a module using one or 
more of the local path, platform path, associated symbol file, UUID, arch,
object name and object offset. This allows many of the calls that were
GetSharedModule to reduce the number of arguments that were used in a call
to these functions. It also allows a module to be created with a ModuleSpec
which allows many things to be specified prior to any accessors being called
on the Module class itself. 

I was running into problems when adding support for "target symbol add"
where you can specify a stand alone debug info file after debugging has started
where I needed to specify the associated symbol file path and if I waited until
after construction, the wrong  symbol file had already been located. By using
the ModuleSpec it allows us to construct a module with as little or as much
information as needed and not have to change the parameter list.

llvm-svn: 151476
2012-02-26 05:51:37 +00:00

595 lines
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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());
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;
}
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())
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;
}
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