707 lines
24 KiB
C++
707 lines
24 KiB
C++
//===-- PlatformRemoteGDBServer.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/lldb-python.h"
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#include "PlatformRemoteGDBServer.h"
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#include "lldb/Host/Config.h"
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// C Includes
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#ifndef LLDB_DISABLE_POSIX
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#include <sys/sysctl.h>
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#endif
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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/BreakpointLocation.h"
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#include "lldb/Core/ConnectionFileDescriptor.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Error.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ModuleList.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/StreamString.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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static bool g_initialized = false;
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void
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PlatformRemoteGDBServer::Initialize ()
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{
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if (g_initialized == false)
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{
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g_initialized = true;
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PluginManager::RegisterPlugin (PlatformRemoteGDBServer::GetPluginNameStatic(),
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PlatformRemoteGDBServer::GetDescriptionStatic(),
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PlatformRemoteGDBServer::CreateInstance);
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}
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}
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void
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PlatformRemoteGDBServer::Terminate ()
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{
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if (g_initialized)
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{
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g_initialized = false;
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PluginManager::UnregisterPlugin (PlatformRemoteGDBServer::CreateInstance);
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}
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}
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Platform*
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PlatformRemoteGDBServer::CreateInstance (bool force, const lldb_private::ArchSpec *arch)
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{
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bool create = force;
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if (!create)
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{
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create = !arch->TripleVendorWasSpecified() && !arch->TripleOSWasSpecified();
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}
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if (create)
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return new PlatformRemoteGDBServer ();
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return NULL;
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}
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lldb_private::ConstString
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PlatformRemoteGDBServer::GetPluginNameStatic()
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{
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static ConstString g_name("remote-gdb-server");
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return g_name;
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}
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const char *
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PlatformRemoteGDBServer::GetDescriptionStatic()
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{
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return "A platform that uses the GDB remote protocol as the communication transport.";
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}
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const char *
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PlatformRemoteGDBServer::GetDescription ()
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{
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if (m_platform_description.empty())
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{
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if (IsConnected())
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{
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// Send the get description packet
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}
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}
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if (!m_platform_description.empty())
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return m_platform_description.c_str();
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return GetDescriptionStatic();
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}
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Error
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PlatformRemoteGDBServer::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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//error.SetErrorString ("PlatformRemoteGDBServer::ResolveExecutable() is unimplemented");
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if (m_gdb_client.GetFileExists(exe_file))
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return error;
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// TODO: get the remote end to somehow resolve this file
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error.SetErrorString("file not found on remote end");
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return error;
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}
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Error
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PlatformRemoteGDBServer::GetFileWithUUID (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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//------------------------------------------------------------------
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/// Default Constructor
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//------------------------------------------------------------------
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PlatformRemoteGDBServer::PlatformRemoteGDBServer () :
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Platform(false), // This is a remote platform
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m_gdb_client(true)
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{
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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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PlatformRemoteGDBServer::~PlatformRemoteGDBServer()
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{
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}
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bool
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PlatformRemoteGDBServer::GetSupportedArchitectureAtIndex (uint32_t idx, ArchSpec &arch)
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{
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return false;
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}
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size_t
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PlatformRemoteGDBServer::GetSoftwareBreakpointTrapOpcode (Target &target, BreakpointSite *bp_site)
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{
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// This isn't needed if the z/Z packets are supported in the GDB remote
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// server. But we might need a packet to detect this.
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return 0;
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}
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bool
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PlatformRemoteGDBServer::GetRemoteOSVersion ()
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{
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uint32_t major, minor, update;
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if (m_gdb_client.GetOSVersion (major, minor, update))
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{
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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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return false;
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}
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bool
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PlatformRemoteGDBServer::GetRemoteOSBuildString (std::string &s)
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{
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return m_gdb_client.GetOSBuildString (s);
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}
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bool
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PlatformRemoteGDBServer::GetRemoteOSKernelDescription (std::string &s)
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{
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return m_gdb_client.GetOSKernelDescription (s);
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}
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// Remote Platform subclasses need to override this function
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ArchSpec
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PlatformRemoteGDBServer::GetRemoteSystemArchitecture ()
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{
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return m_gdb_client.GetSystemArchitecture();
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}
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lldb_private::ConstString
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PlatformRemoteGDBServer::GetRemoteWorkingDirectory()
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{
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if (IsConnected())
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{
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Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
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std::string cwd;
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if (m_gdb_client.GetWorkingDir(cwd))
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{
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ConstString working_dir(cwd.c_str());
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if (log)
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log->Printf("PlatformRemoteGDBServer::GetRemoteWorkingDirectory() -> '%s'", working_dir.GetCString());
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return working_dir;
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}
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else
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{
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return ConstString();
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}
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}
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else
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{
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return Platform::GetRemoteWorkingDirectory();
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}
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}
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bool
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PlatformRemoteGDBServer::SetRemoteWorkingDirectory(const lldb_private::ConstString &path)
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{
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if (IsConnected())
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{
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// Clear the working directory it case it doesn't get set correctly. This will
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// for use to re-read it
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Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
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if (log)
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log->Printf("PlatformRemoteGDBServer::SetRemoteWorkingDirectory('%s')", path.GetCString());
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return m_gdb_client.SetWorkingDir(path.GetCString()) == 0;
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}
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else
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return Platform::SetRemoteWorkingDirectory(path);
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}
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bool
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PlatformRemoteGDBServer::IsConnected () const
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{
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return m_gdb_client.IsConnected();
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}
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Error
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PlatformRemoteGDBServer::ConnectRemote (Args& args)
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{
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Error error;
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if (IsConnected())
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{
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error.SetErrorStringWithFormat ("the platform is already connected to '%s', execute 'platform disconnect' to close the current connection",
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GetHostname());
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}
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else
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{
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if (args.GetArgumentCount() == 1)
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{
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const char *url = args.GetArgumentAtIndex(0);
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m_gdb_client.SetConnection (new ConnectionFileDescriptor());
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const ConnectionStatus status = m_gdb_client.Connect(url, &error);
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if (status == eConnectionStatusSuccess)
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{
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if (m_gdb_client.HandshakeWithServer(&error))
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{
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m_gdb_client.GetHostInfo();
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// If a working directory was set prior to connecting, send it down now
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if (m_working_dir)
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m_gdb_client.SetWorkingDir(m_working_dir.GetCString());
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}
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else
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{
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m_gdb_client.Disconnect();
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if (error.Success())
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error.SetErrorString("handshake failed");
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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.SetErrorString ("\"platform connect\" takes a single argument: <connect-url>");
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}
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}
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return error;
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}
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Error
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PlatformRemoteGDBServer::DisconnectRemote ()
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{
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Error error;
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m_gdb_client.Disconnect(&error);
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return error;
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}
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const char *
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PlatformRemoteGDBServer::GetHostname ()
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{
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m_gdb_client.GetHostname (m_name);
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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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PlatformRemoteGDBServer::GetUserName (uint32_t uid)
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{
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// Try and get a cache user name first
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const char *cached_user_name = Platform::GetUserName(uid);
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if (cached_user_name)
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return cached_user_name;
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std::string name;
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if (m_gdb_client.GetUserName(uid, name))
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return SetCachedUserName(uid, name.c_str(), name.size());
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SetUserNameNotFound(uid); // Negative cache so we don't keep sending packets
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return NULL;
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}
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const char *
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PlatformRemoteGDBServer::GetGroupName (uint32_t gid)
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{
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const char *cached_group_name = Platform::GetGroupName(gid);
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if (cached_group_name)
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return cached_group_name;
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std::string name;
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if (m_gdb_client.GetGroupName(gid, name))
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return SetCachedGroupName(gid, name.c_str(), name.size());
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SetGroupNameNotFound(gid); // Negative cache so we don't keep sending packets
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return NULL;
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}
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uint32_t
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PlatformRemoteGDBServer::FindProcesses (const ProcessInstanceInfoMatch &match_info,
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ProcessInstanceInfoList &process_infos)
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{
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return m_gdb_client.FindProcesses (match_info, process_infos);
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}
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bool
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PlatformRemoteGDBServer::GetProcessInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info)
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{
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return m_gdb_client.GetProcessInfo (pid, process_info);
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}
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Error
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PlatformRemoteGDBServer::LaunchProcess (ProcessLaunchInfo &launch_info)
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{
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Error error;
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lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
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m_gdb_client.SetSTDIN ("/dev/null");
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m_gdb_client.SetSTDOUT ("/dev/null");
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m_gdb_client.SetSTDERR ("/dev/null");
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m_gdb_client.SetDisableASLR (launch_info.GetFlags().Test (eLaunchFlagDisableASLR));
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const char *working_dir = launch_info.GetWorkingDirectory();
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if (working_dir && working_dir[0])
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{
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m_gdb_client.SetWorkingDir (working_dir);
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}
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// Send the environment and the program + arguments after we connect
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const char **envp = launch_info.GetEnvironmentEntries().GetConstArgumentVector();
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if (envp)
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{
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const char *env_entry;
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for (int i=0; (env_entry = envp[i]); ++i)
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{
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if (m_gdb_client.SendEnvironmentPacket(env_entry) != 0)
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break;
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}
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}
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ArchSpec arch_spec = launch_info.GetArchitecture();
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const char *arch_triple = arch_spec.GetTriple().str().c_str();
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m_gdb_client.SendLaunchArchPacket(arch_triple);
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const uint32_t old_packet_timeout = m_gdb_client.SetPacketTimeout (5);
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int arg_packet_err = m_gdb_client.SendArgumentsPacket (launch_info);
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m_gdb_client.SetPacketTimeout (old_packet_timeout);
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if (arg_packet_err == 0)
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{
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std::string error_str;
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if (m_gdb_client.GetLaunchSuccess (error_str))
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{
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pid = m_gdb_client.GetCurrentProcessID ();
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if (pid != LLDB_INVALID_PROCESS_ID)
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launch_info.SetProcessID (pid);
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}
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else
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{
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error.SetErrorString (error_str.c_str());
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}
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}
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else
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{
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error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err);
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}
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return error;
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}
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lldb::ProcessSP
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PlatformRemoteGDBServer::DebugProcess (lldb_private::ProcessLaunchInfo &launch_info,
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lldb_private::Debugger &debugger,
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lldb_private::Target *target, // Can be NULL, if NULL create a new target, else use existing one
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lldb_private::Listener &listener,
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lldb_private::Error &error)
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{
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lldb::ProcessSP process_sp;
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if (IsRemote())
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{
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if (IsConnected())
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{
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lldb::pid_t debugserver_pid = LLDB_INVALID_PROCESS_ID;
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ArchSpec remote_arch = GetRemoteSystemArchitecture();
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llvm::Triple &remote_triple = remote_arch.GetTriple();
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uint16_t port = 0;
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if (remote_triple.getVendor() == llvm::Triple::Apple && remote_triple.getOS() == llvm::Triple::IOS)
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{
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// When remote debugging to iOS, we use a USB mux that always talks
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// to localhost, so we will need the remote debugserver to accept connections
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// only from localhost, no matter what our current hostname is
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port = m_gdb_client.LaunchGDBserverAndGetPort(debugserver_pid, "127.0.0.1");
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}
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else
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{
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// All other hosts should use their actual hostname
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port = m_gdb_client.LaunchGDBserverAndGetPort(debugserver_pid, NULL);
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}
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if (port == 0)
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{
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error.SetErrorStringWithFormat ("unable to launch a GDB server on '%s'", GetHostname ());
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}
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else
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{
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if (target == NULL)
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{
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TargetSP new_target_sp;
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error = debugger.GetTargetList().CreateTarget (debugger,
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NULL,
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NULL,
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false,
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NULL,
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new_target_sp);
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target = new_target_sp.get();
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}
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else
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error.Clear();
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if (target && error.Success())
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{
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debugger.GetTargetList().SetSelectedTarget(target);
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// The darwin always currently uses the GDB remote debugger plug-in
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// so even when debugging locally we are debugging remotely!
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process_sp = target->CreateProcess (listener, "gdb-remote", NULL);
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if (process_sp)
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{
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char connect_url[256];
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const char *override_hostname = getenv("LLDB_PLATFORM_REMOTE_GDB_SERVER_HOSTNAME");
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const char *port_offset_c_str = getenv("LLDB_PLATFORM_REMOTE_GDB_SERVER_PORT_OFFSET");
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int port_offset = port_offset_c_str ? ::atoi(port_offset_c_str) : 0;
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const int connect_url_len = ::snprintf (connect_url,
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sizeof(connect_url),
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"connect://%s:%u",
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override_hostname ? override_hostname : GetHostname (),
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port + port_offset);
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assert (connect_url_len < (int)sizeof(connect_url));
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error = process_sp->ConnectRemote (NULL, connect_url);
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if (error.Success())
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error = process_sp->Launch(launch_info);
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else if (debugserver_pid != LLDB_INVALID_PROCESS_ID)
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m_gdb_client.KillSpawnedProcess(debugserver_pid);
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}
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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.SetErrorString("not connected to remote gdb server");
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}
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}
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return process_sp;
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}
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lldb::ProcessSP
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PlatformRemoteGDBServer::Attach (lldb_private::ProcessAttachInfo &attach_info,
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Debugger &debugger,
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Target *target, // Can be NULL, if NULL create a new target, else use existing one
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Listener &listener,
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Error &error)
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{
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lldb::ProcessSP process_sp;
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if (IsRemote())
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{
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if (IsConnected())
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{
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lldb::pid_t debugserver_pid = LLDB_INVALID_PROCESS_ID;
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ArchSpec remote_arch = GetRemoteSystemArchitecture();
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llvm::Triple &remote_triple = remote_arch.GetTriple();
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uint16_t port = 0;
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if (remote_triple.getVendor() == llvm::Triple::Apple && remote_triple.getOS() == llvm::Triple::IOS)
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{
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// When remote debugging to iOS, we use a USB mux that always talks
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// to localhost, so we will need the remote debugserver to accept connections
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// only from localhost, no matter what our current hostname is
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port = m_gdb_client.LaunchGDBserverAndGetPort(debugserver_pid, "127.0.0.1");
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}
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else
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{
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// All other hosts should use their actual hostname
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port = m_gdb_client.LaunchGDBserverAndGetPort(debugserver_pid, NULL);
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}
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if (port == 0)
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{
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error.SetErrorStringWithFormat ("unable to launch a GDB server on '%s'", GetHostname ());
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}
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else
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{
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if (target == NULL)
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{
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TargetSP new_target_sp;
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error = debugger.GetTargetList().CreateTarget (debugger,
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NULL,
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NULL,
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false,
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NULL,
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new_target_sp);
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target = new_target_sp.get();
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}
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else
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error.Clear();
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if (target && error.Success())
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{
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debugger.GetTargetList().SetSelectedTarget(target);
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// The darwin always currently uses the GDB remote debugger plug-in
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// so even when debugging locally we are debugging remotely!
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process_sp = target->CreateProcess (listener, "gdb-remote", NULL);
|
|
|
|
if (process_sp)
|
|
{
|
|
char connect_url[256];
|
|
const char *override_hostname = getenv("LLDB_PLATFORM_REMOTE_GDB_SERVER_HOSTNAME");
|
|
const char *port_offset_c_str = getenv("LLDB_PLATFORM_REMOTE_GDB_SERVER_PORT_OFFSET");
|
|
int port_offset = port_offset_c_str ? ::atoi(port_offset_c_str) : 0;
|
|
const int connect_url_len = ::snprintf (connect_url,
|
|
sizeof(connect_url),
|
|
"connect://%s:%u",
|
|
override_hostname ? override_hostname : GetHostname (),
|
|
port + port_offset);
|
|
assert (connect_url_len < (int)sizeof(connect_url));
|
|
error = process_sp->ConnectRemote (NULL, connect_url);
|
|
if (error.Success())
|
|
error = process_sp->Attach(attach_info);
|
|
else if (debugserver_pid != LLDB_INVALID_PROCESS_ID)
|
|
{
|
|
m_gdb_client.KillSpawnedProcess(debugserver_pid);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
error.SetErrorString("not connected to remote gdb server");
|
|
}
|
|
}
|
|
return process_sp;
|
|
}
|
|
|
|
Error
|
|
PlatformRemoteGDBServer::MakeDirectory (const char *path, uint32_t mode)
|
|
{
|
|
Error error = m_gdb_client.MakeDirectory(path,mode);
|
|
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
|
|
if (log)
|
|
log->Printf ("PlatformRemoteGDBServer::MakeDirectory(path='%s', mode=%o) error = %u (%s)", path, mode, error.GetError(), error.AsCString());
|
|
return error;
|
|
}
|
|
|
|
|
|
Error
|
|
PlatformRemoteGDBServer::GetFilePermissions (const char *path, uint32_t &file_permissions)
|
|
{
|
|
Error error = m_gdb_client.GetFilePermissions(path, file_permissions);
|
|
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
|
|
if (log)
|
|
log->Printf ("PlatformRemoteGDBServer::GetFilePermissions(path='%s', file_permissions=%o) error = %u (%s)", path, file_permissions, error.GetError(), error.AsCString());
|
|
return error;
|
|
}
|
|
|
|
Error
|
|
PlatformRemoteGDBServer::SetFilePermissions (const char *path, uint32_t file_permissions)
|
|
{
|
|
Error error = m_gdb_client.SetFilePermissions(path, file_permissions);
|
|
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
|
|
if (log)
|
|
log->Printf ("PlatformRemoteGDBServer::SetFilePermissions(path='%s', file_permissions=%o) error = %u (%s)", path, file_permissions, error.GetError(), error.AsCString());
|
|
return error;
|
|
}
|
|
|
|
|
|
lldb::user_id_t
|
|
PlatformRemoteGDBServer::OpenFile (const lldb_private::FileSpec& file_spec,
|
|
uint32_t flags,
|
|
uint32_t mode,
|
|
Error &error)
|
|
{
|
|
return m_gdb_client.OpenFile (file_spec, flags, mode, error);
|
|
}
|
|
|
|
bool
|
|
PlatformRemoteGDBServer::CloseFile (lldb::user_id_t fd, Error &error)
|
|
{
|
|
return m_gdb_client.CloseFile (fd, error);
|
|
}
|
|
|
|
lldb::user_id_t
|
|
PlatformRemoteGDBServer::GetFileSize (const lldb_private::FileSpec& file_spec)
|
|
{
|
|
return m_gdb_client.GetFileSize(file_spec);
|
|
}
|
|
|
|
uint64_t
|
|
PlatformRemoteGDBServer::ReadFile (lldb::user_id_t fd,
|
|
uint64_t offset,
|
|
void *dst,
|
|
uint64_t dst_len,
|
|
Error &error)
|
|
{
|
|
return m_gdb_client.ReadFile (fd, offset, dst, dst_len, error);
|
|
}
|
|
|
|
uint64_t
|
|
PlatformRemoteGDBServer::WriteFile (lldb::user_id_t fd,
|
|
uint64_t offset,
|
|
const void* src,
|
|
uint64_t src_len,
|
|
Error &error)
|
|
{
|
|
return m_gdb_client.WriteFile (fd, offset, src, src_len, error);
|
|
}
|
|
|
|
lldb_private::Error
|
|
PlatformRemoteGDBServer::PutFile (const lldb_private::FileSpec& source,
|
|
const lldb_private::FileSpec& destination,
|
|
uint32_t uid,
|
|
uint32_t gid)
|
|
{
|
|
return Platform::PutFile(source,destination,uid,gid);
|
|
}
|
|
|
|
Error
|
|
PlatformRemoteGDBServer::CreateSymlink (const char *src, // The name of the link is in src
|
|
const char *dst) // The symlink points to dst
|
|
{
|
|
Error error = m_gdb_client.CreateSymlink (src, dst);
|
|
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
|
|
if (log)
|
|
log->Printf ("PlatformRemoteGDBServer::CreateSymlink(src='%s', dst='%s') error = %u (%s)", src, dst, error.GetError(), error.AsCString());
|
|
return error;
|
|
}
|
|
|
|
Error
|
|
PlatformRemoteGDBServer::Unlink (const char *path)
|
|
{
|
|
Error error = m_gdb_client.Unlink (path);
|
|
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
|
|
if (log)
|
|
log->Printf ("PlatformRemoteGDBServer::Unlink(path='%s') error = %u (%s)", path, error.GetError(), error.AsCString());
|
|
return error;
|
|
}
|
|
|
|
bool
|
|
PlatformRemoteGDBServer::GetFileExists (const lldb_private::FileSpec& file_spec)
|
|
{
|
|
return m_gdb_client.GetFileExists (file_spec);
|
|
}
|
|
|
|
lldb_private::Error
|
|
PlatformRemoteGDBServer::RunShellCommand (const char *command, // Shouldn't be NULL
|
|
const char *working_dir, // Pass NULL 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
|
|
{
|
|
return m_gdb_client.RunShellCommand (command, working_dir, status_ptr, signo_ptr, command_output, timeout_sec);
|
|
}
|
|
|
|
void
|
|
PlatformRemoteGDBServer::CalculateTrapHandlerSymbolNames ()
|
|
{
|
|
m_trap_handlers.push_back (ConstString ("_sigtramp"));
|
|
}
|