mirror of
https://github.com/intel/llvm.git
synced 2026-01-14 20:10:50 +08:00
5160ce5c72
LLDB is crashing when logging is enabled from lldb-perf-clang. This has to do with the global destructor chain as the process and its threads are being torn down. All logging channels now make one and only one instance that is kept in a global pointer which is never freed. This guarantees that logging can correctly continue as the process tears itself down. llvm-svn: 178191
750 lines
23 KiB
C++
750 lines
23 KiB
C++
//===-- Platform.cpp --------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Target/Platform.h"
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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Breakpoint/BreakpointIDList.h"
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#include "lldb/Core/Error.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/ModuleSpec.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Host/FileSpec.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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using namespace lldb;
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using namespace lldb_private;
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// Use a singleton function for g_local_platform_sp to avoid init
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// constructors since LLDB is often part of a shared library
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static PlatformSP&
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GetDefaultPlatformSP ()
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{
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static PlatformSP g_default_platform_sp;
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return g_default_platform_sp;
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}
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static Mutex &
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GetConnectedPlatformListMutex ()
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{
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static Mutex g_remote_connected_platforms_mutex (Mutex::eMutexTypeRecursive);
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return g_remote_connected_platforms_mutex;
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}
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static std::vector<PlatformSP> &
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GetConnectedPlatformList ()
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{
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static std::vector<PlatformSP> g_remote_connected_platforms;
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return g_remote_connected_platforms;
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}
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const char *
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Platform::GetHostPlatformName ()
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{
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return "host";
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}
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//------------------------------------------------------------------
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/// Get the native host platform plug-in.
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///
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/// There should only be one of these for each host that LLDB runs
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/// upon that should be statically compiled in and registered using
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/// preprocessor macros or other similar build mechanisms.
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///
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/// This platform will be used as the default platform when launching
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/// or attaching to processes unless another platform is specified.
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//------------------------------------------------------------------
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PlatformSP
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Platform::GetDefaultPlatform ()
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{
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return GetDefaultPlatformSP ();
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}
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void
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Platform::SetDefaultPlatform (const lldb::PlatformSP &platform_sp)
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{
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// The native platform should use its static void Platform::Initialize()
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// function to register itself as the native platform.
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GetDefaultPlatformSP () = platform_sp;
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}
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Error
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Platform::GetFile (const FileSpec &platform_file,
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const UUID *uuid_ptr,
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FileSpec &local_file)
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{
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// Default to the local case
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local_file = platform_file;
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return Error();
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}
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FileSpecList
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Platform::LocateExecutableScriptingResources (Target *target, Module &module)
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{
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return FileSpecList();
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}
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Error
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Platform::GetSharedModule (const ModuleSpec &module_spec,
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ModuleSP &module_sp,
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const FileSpecList *module_search_paths_ptr,
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ModuleSP *old_module_sp_ptr,
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bool *did_create_ptr)
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{
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// Don't do any path remapping for the default implementation
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// of the platform GetSharedModule function, just call through
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// to our static ModuleList function. Platform subclasses that
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// implement remote debugging, might have a developer kits
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// installed that have cached versions of the files for the
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// remote target, or might implement a download and cache
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// locally implementation.
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const bool always_create = false;
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return ModuleList::GetSharedModule (module_spec,
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module_sp,
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module_search_paths_ptr,
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old_module_sp_ptr,
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did_create_ptr,
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always_create);
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}
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PlatformSP
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Platform::Create (const char *platform_name, Error &error)
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{
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PlatformCreateInstance create_callback = NULL;
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lldb::PlatformSP platform_sp;
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if (platform_name && platform_name[0])
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{
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create_callback = PluginManager::GetPlatformCreateCallbackForPluginName (platform_name);
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if (create_callback)
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platform_sp.reset(create_callback(true, NULL));
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else
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error.SetErrorStringWithFormat ("unable to find a plug-in for the platform named \"%s\"", platform_name);
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}
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else
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error.SetErrorString ("invalid platform name");
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return platform_sp;
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}
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PlatformSP
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Platform::Create (const ArchSpec &arch, ArchSpec *platform_arch_ptr, Error &error)
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{
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lldb::PlatformSP platform_sp;
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if (arch.IsValid())
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{
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uint32_t idx;
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PlatformCreateInstance create_callback;
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// First try exact arch matches across all platform plug-ins
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bool exact = true;
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for (idx = 0; (create_callback = PluginManager::GetPlatformCreateCallbackAtIndex (idx)); ++idx)
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{
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if (create_callback)
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{
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platform_sp.reset(create_callback(false, &arch));
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if (platform_sp && platform_sp->IsCompatibleArchitecture(arch, exact, platform_arch_ptr))
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return platform_sp;
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}
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}
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// Next try compatible arch matches across all platform plug-ins
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exact = false;
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for (idx = 0; (create_callback = PluginManager::GetPlatformCreateCallbackAtIndex (idx)); ++idx)
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{
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if (create_callback)
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{
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platform_sp.reset(create_callback(false, &arch));
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if (platform_sp && platform_sp->IsCompatibleArchitecture(arch, exact, platform_arch_ptr))
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return platform_sp;
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}
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}
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}
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else
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error.SetErrorString ("invalid platform name");
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if (platform_arch_ptr)
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platform_arch_ptr->Clear();
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platform_sp.reset();
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return platform_sp;
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}
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uint32_t
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Platform::GetNumConnectedRemotePlatforms ()
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{
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Mutex::Locker locker (GetConnectedPlatformListMutex ());
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return GetConnectedPlatformList().size();
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}
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PlatformSP
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Platform::GetConnectedRemotePlatformAtIndex (uint32_t idx)
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{
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PlatformSP platform_sp;
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{
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Mutex::Locker locker (GetConnectedPlatformListMutex ());
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if (idx < GetConnectedPlatformList().size())
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platform_sp = GetConnectedPlatformList ()[idx];
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}
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return platform_sp;
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}
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//------------------------------------------------------------------
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/// Default Constructor
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//------------------------------------------------------------------
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Platform::Platform (bool is_host) :
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m_is_host (is_host),
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m_os_version_set_while_connected (false),
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m_system_arch_set_while_connected (false),
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m_sdk_sysroot (),
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m_sdk_build (),
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m_remote_url (),
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m_name (),
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m_major_os_version (UINT32_MAX),
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m_minor_os_version (UINT32_MAX),
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m_update_os_version (UINT32_MAX),
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m_system_arch(),
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m_uid_map_mutex (Mutex::eMutexTypeNormal),
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m_gid_map_mutex (Mutex::eMutexTypeNormal),
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m_uid_map(),
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m_gid_map(),
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m_max_uid_name_len (0),
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m_max_gid_name_len (0)
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{
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Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
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if (log)
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log->Printf ("%p Platform::Platform()", this);
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}
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//------------------------------------------------------------------
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/// Destructor.
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///
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/// The destructor is virtual since this class is designed to be
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/// inherited from by the plug-in instance.
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//------------------------------------------------------------------
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Platform::~Platform()
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{
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Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
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if (log)
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log->Printf ("%p Platform::~Platform()", this);
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}
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void
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Platform::GetStatus (Stream &strm)
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{
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uint32_t major = UINT32_MAX;
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uint32_t minor = UINT32_MAX;
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uint32_t update = UINT32_MAX;
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std::string s;
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strm.Printf (" Platform: %s\n", GetShortPluginName());
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ArchSpec arch (GetSystemArchitecture());
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if (arch.IsValid())
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{
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if (!arch.GetTriple().str().empty())
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strm.Printf(" Triple: %s\n", arch.GetTriple().str().c_str());
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}
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if (GetOSVersion(major, minor, update))
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{
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strm.Printf("OS Version: %u", major);
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if (minor != UINT32_MAX)
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strm.Printf(".%u", minor);
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if (update != UINT32_MAX)
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strm.Printf(".%u", update);
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if (GetOSBuildString (s))
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strm.Printf(" (%s)", s.c_str());
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strm.EOL();
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}
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if (GetOSKernelDescription (s))
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strm.Printf(" Kernel: %s\n", s.c_str());
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if (IsHost())
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{
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strm.Printf(" Hostname: %s\n", GetHostname());
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}
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else
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{
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const bool is_connected = IsConnected();
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if (is_connected)
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strm.Printf(" Hostname: %s\n", GetHostname());
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strm.Printf(" Connected: %s\n", is_connected ? "yes" : "no");
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}
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}
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bool
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Platform::GetOSVersion (uint32_t &major,
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uint32_t &minor,
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uint32_t &update)
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{
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bool success = m_major_os_version != UINT32_MAX;
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if (IsHost())
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{
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if (!success)
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{
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// We have a local host platform
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success = Host::GetOSVersion (m_major_os_version,
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m_minor_os_version,
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m_update_os_version);
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m_os_version_set_while_connected = success;
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}
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}
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else
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{
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// We have a remote platform. We can only fetch the remote
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// OS version if we are connected, and we don't want to do it
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// more than once.
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const bool is_connected = IsConnected();
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bool fetch = false;
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if (success)
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{
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// We have valid OS version info, check to make sure it wasn't
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// manually set prior to connecting. If it was manually set prior
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// to connecting, then lets fetch the actual OS version info
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// if we are now connected.
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if (is_connected && !m_os_version_set_while_connected)
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fetch = true;
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}
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else
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{
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// We don't have valid OS version info, fetch it if we are connected
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fetch = is_connected;
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}
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if (fetch)
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{
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success = GetRemoteOSVersion ();
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m_os_version_set_while_connected = success;
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}
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}
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if (success)
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{
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major = m_major_os_version;
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minor = m_minor_os_version;
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update = m_update_os_version;
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}
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return success;
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}
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bool
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Platform::GetOSBuildString (std::string &s)
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{
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if (IsHost())
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return Host::GetOSBuildString (s);
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else
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return GetRemoteOSBuildString (s);
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}
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bool
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Platform::GetOSKernelDescription (std::string &s)
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{
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if (IsHost())
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return Host::GetOSKernelDescription (s);
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else
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return GetRemoteOSKernelDescription (s);
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}
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const char *
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Platform::GetName ()
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{
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const char *name = GetHostname();
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if (name == NULL || name[0] == '\0')
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name = GetShortPluginName();
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return name;
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}
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const char *
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Platform::GetHostname ()
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{
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if (IsHost())
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return "localhost";
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if (m_name.empty())
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return NULL;
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return m_name.c_str();
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}
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const char *
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Platform::GetUserName (uint32_t uid)
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{
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const char *user_name = GetCachedUserName(uid);
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if (user_name)
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return user_name;
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if (IsHost())
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{
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std::string name;
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if (Host::GetUserName(uid, name))
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return SetCachedUserName (uid, name.c_str(), name.size());
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}
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return NULL;
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}
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const char *
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Platform::GetGroupName (uint32_t gid)
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{
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const char *group_name = GetCachedGroupName(gid);
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if (group_name)
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return group_name;
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if (IsHost())
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{
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std::string name;
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if (Host::GetGroupName(gid, name))
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return SetCachedGroupName (gid, name.c_str(), name.size());
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}
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return NULL;
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}
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bool
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Platform::SetOSVersion (uint32_t major,
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uint32_t minor,
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uint32_t update)
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{
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if (IsHost())
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{
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// We don't need anyone setting the OS version for the host platform,
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// we should be able to figure it out by calling Host::GetOSVersion(...).
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return false;
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}
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else
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{
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// We have a remote platform, allow setting the target OS version if
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// we aren't connected, since if we are connected, we should be able to
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// request the remote OS version from the connected platform.
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if (IsConnected())
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return false;
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else
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{
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// We aren't connected and we might want to set the OS version
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// ahead of time before we connect so we can peruse files and
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// use a local SDK or PDK cache of support files to disassemble
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// or do other things.
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m_major_os_version = major;
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m_minor_os_version = minor;
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m_update_os_version = update;
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return true;
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}
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}
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return false;
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}
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Error
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Platform::ResolveExecutable (const FileSpec &exe_file,
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const ArchSpec &exe_arch,
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lldb::ModuleSP &exe_module_sp,
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const FileSpecList *module_search_paths_ptr)
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{
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Error error;
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if (exe_file.Exists())
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{
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ModuleSpec module_spec (exe_file, exe_arch);
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if (module_spec.GetArchitecture().IsValid())
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{
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error = ModuleList::GetSharedModule (module_spec,
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exe_module_sp,
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module_search_paths_ptr,
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NULL,
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NULL);
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}
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else
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{
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// No valid architecture was specified, ask the platform for
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// the architectures that we should be using (in the correct order)
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// and see if we can find a match that way
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for (uint32_t idx = 0; GetSupportedArchitectureAtIndex (idx, module_spec.GetArchitecture()); ++idx)
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{
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error = ModuleList::GetSharedModule (module_spec,
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exe_module_sp,
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module_search_paths_ptr,
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NULL,
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NULL);
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// Did we find an executable using one of the
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if (error.Success() && exe_module_sp)
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break;
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}
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}
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}
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else
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{
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error.SetErrorStringWithFormat ("'%s%s%s' does not exist",
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exe_file.GetDirectory().AsCString(""),
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exe_file.GetDirectory() ? "/" : "",
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exe_file.GetFilename().AsCString(""));
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}
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return error;
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}
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Error
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Platform::ResolveSymbolFile (Target &target,
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const ModuleSpec &sym_spec,
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FileSpec &sym_file)
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{
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Error error;
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if (sym_spec.GetSymbolFileSpec().Exists())
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sym_file = sym_spec.GetSymbolFileSpec();
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else
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error.SetErrorString("unable to resolve symbol file");
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return error;
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}
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bool
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Platform::ResolveRemotePath (const FileSpec &platform_path,
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FileSpec &resolved_platform_path)
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{
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resolved_platform_path = platform_path;
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return resolved_platform_path.ResolvePath();
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}
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const ArchSpec &
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Platform::GetSystemArchitecture()
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{
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if (IsHost())
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{
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if (!m_system_arch.IsValid())
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{
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// We have a local host platform
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m_system_arch = Host::GetArchitecture();
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m_system_arch_set_while_connected = m_system_arch.IsValid();
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}
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}
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else
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{
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// We have a remote platform. We can only fetch the remote
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// system architecture if we are connected, and we don't want to do it
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// more than once.
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const bool is_connected = IsConnected();
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bool fetch = false;
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if (m_system_arch.IsValid())
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{
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// We have valid OS version info, check to make sure it wasn't
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// manually set prior to connecting. If it was manually set prior
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// to connecting, then lets fetch the actual OS version info
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// if we are now connected.
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if (is_connected && !m_system_arch_set_while_connected)
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fetch = true;
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}
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else
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{
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// We don't have valid OS version info, fetch it if we are connected
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fetch = is_connected;
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}
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if (fetch)
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{
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m_system_arch = GetRemoteSystemArchitecture ();
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m_system_arch_set_while_connected = m_system_arch.IsValid();
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}
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}
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return m_system_arch;
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}
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Error
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Platform::ConnectRemote (Args& args)
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{
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Error error;
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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;
|
|
const bool will_debug = launch_info.GetFlags().Test(eLaunchFlagDebug);
|
|
const bool first_arg_is_full_shell_command = false;
|
|
if (!launch_info.ConvertArgumentsForLaunchingInShell (error,
|
|
is_localhost,
|
|
will_debug,
|
|
first_arg_is_full_shell_command))
|
|
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);
|
|
// 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);
|
|
|
|
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, ArchSpec *platform_arch_ptr)
|
|
{
|
|
lldb::PlatformSP platform_sp;
|
|
Error 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;
|
|
|
|
}
|
|
|
|
|
|
lldb::BreakpointSP
|
|
Platform::SetThreadCreationBreakpoint (lldb_private::Target &target)
|
|
{
|
|
return lldb::BreakpointSP();
|
|
}
|
|
|
|
size_t
|
|
Platform::GetEnvironment (StringList &environment)
|
|
{
|
|
environment.Clear();
|
|
return false;
|
|
}
|
|
|