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llvm-capstone/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
Dimitar Vlahovski ee44a92df6 Revert "Intel(R) Memory Protection Extensions (Intel(R) MPX) support." 
This reverts commit rL280668 because the register tests fail on i386
Linux.

I investigated a little bit what causes the failure - there are missing
registers when running 'register read -a'.
This is the output I got at the bottom:
"""
...
Memory Protection Extensions:
      bnd0 = {0x0000000000000000 0x0000000000000000}
      bnd1 = {0x0000000000000000 0x0000000000000000}
      bnd2 = {0x0000000000000000 0x0000000000000000}
      bnd3 = {0x0000000000000000 0x0000000000000000}

unknown:
2 registers were unavailable.
"""

Also looking at the packets exchanged between the client and server:
"""
...
history[308] tid=0x7338 <  19> send packet: $qRegisterInfo4a#d7
history[309] tid=0x7338 < 130> read packet:
$name:bnd0;bitsize:128;offset:1032;encoding:vector;format:vector-uint64;set:Memory
Protection Extensions;ehframe:101;dwarf:101;#48
history[310] tid=0x7338 <  19> send packet: $qRegisterInfo4b#d8
history[311] tid=0x7338 < 130> read packet:
$name:bnd1;bitsize:128;offset:1048;encoding:vector;format:vector-uint64;set:Memory
Protection Extensions;ehframe:102;dwarf:102;#52
history[312] tid=0x7338 <  19> send packet: $qRegisterInfo4c#d9
history[313] tid=0x7338 < 130> read packet:
$name:bnd2;bitsize:128;offset:1064;encoding:vector;format:vector-uint64;set:Memory
Protection Extensions;ehframe:103;dwarf:103;#53
history[314] tid=0x7338 <  19> send packet: $qRegisterInfo4d#da
history[315] tid=0x7338 < 130> read packet:
$name:bnd3;bitsize:128;offset:1080;encoding:vector;format:vector-uint64;set:Memory
Protection Extensions;ehframe:104;dwarf:104;#54
history[316] tid=0x7338 <  19> send packet: $qRegisterInfo4e#db
history[317] tid=0x7338 <  76> read packet:
$name:bndcfgu;bitsize:64;offset:1096;encoding:vector;format:vector-uint8;#99
history[318] tid=0x7338 <  19> send packet: $qRegisterInfo4f#dc
history[319] tid=0x7338 <  78> read packet:
$name:bndstatus;bitsize:64;offset:1104;encoding:vector;format:vector-uint8;#8e
...
"""

The bndcfgu and bndstatus registers don't have the 'Memory Protections
Extension' set. I looked at the code and it seems that that is set
correctly.

So I'm not sure what's the problem or where does it come from.

Also there is a second failure related to something like this in the
tests:
"""
registerSet.GetName().lower()
"""

For some reason the registerSet.GetName() returns None.

llvm-svn: 280703
2016-09-06 11:00:37 +00:00

3001 lines
113 KiB
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//===-- GDBRemoteCommunicationServerLLGS.cpp --------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <errno.h>
#include "lldb/Host/Config.h"
#include "GDBRemoteCommunicationServerLLGS.h"
#include "lldb/Core/StreamGDBRemote.h"
// C Includes
// C++ Includes
#include <cstring>
#include <chrono>
#include <thread>
// Other libraries and framework includes
#include "lldb/Core/DataBuffer.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/RegisterValue.h"
#include "lldb/Core/State.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Host/ConnectionFileDescriptor.h"
#include "lldb/Host/Debug.h"
#include "lldb/Host/Endian.h"
#include "lldb/Host/File.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/StringConvert.h"
#include "lldb/Host/TimeValue.h"
#include "lldb/Host/common/NativeProcessProtocol.h"
#include "lldb/Host/common/NativeRegisterContext.h"
#include "lldb/Host/common/NativeThreadProtocol.h"
#include "lldb/Interpreter/Args.h"
#include "lldb/Target/FileAction.h"
#include "lldb/Target/MemoryRegionInfo.h"
#include "lldb/Utility/JSON.h"
#include "lldb/Utility/LLDBAssert.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/ScopedPrinter.h"
// Project includes
#include "Utility/StringExtractorGDBRemote.h"
#include "Utility/UriParser.h"
#include "ProcessGDBRemote.h"
#include "ProcessGDBRemoteLog.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::process_gdb_remote;
using namespace llvm;
//----------------------------------------------------------------------
// GDBRemote Errors
//----------------------------------------------------------------------
namespace
{
enum GDBRemoteServerError
{
// Set to the first unused error number in literal form below
eErrorFirst = 29,
eErrorNoProcess = eErrorFirst,
eErrorResume,
eErrorExitStatus
};
}
//----------------------------------------------------------------------
// GDBRemoteCommunicationServerLLGS constructor
//----------------------------------------------------------------------
GDBRemoteCommunicationServerLLGS::GDBRemoteCommunicationServerLLGS(MainLoop &mainloop)
: GDBRemoteCommunicationServerCommon("gdb-remote.server", "gdb-remote.server.rx_packet"),
m_mainloop(mainloop),
m_current_tid(LLDB_INVALID_THREAD_ID),
m_continue_tid(LLDB_INVALID_THREAD_ID),
m_debugged_process_mutex(),
m_debugged_process_sp(),
m_stdio_communication("process.stdio"),
m_inferior_prev_state(StateType::eStateInvalid),
m_active_auxv_buffer_sp(),
m_saved_registers_mutex(),
m_saved_registers_map(),
m_next_saved_registers_id(1),
m_handshake_completed(false)
{
RegisterPacketHandlers();
}
void
GDBRemoteCommunicationServerLLGS::RegisterPacketHandlers()
{
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_C,
&GDBRemoteCommunicationServerLLGS::Handle_C);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_c,
&GDBRemoteCommunicationServerLLGS::Handle_c);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_D,
&GDBRemoteCommunicationServerLLGS::Handle_D);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_H,
&GDBRemoteCommunicationServerLLGS::Handle_H);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_I,
&GDBRemoteCommunicationServerLLGS::Handle_I);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_interrupt,
&GDBRemoteCommunicationServerLLGS::Handle_interrupt);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_m,
&GDBRemoteCommunicationServerLLGS::Handle_memory_read);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_M,
&GDBRemoteCommunicationServerLLGS::Handle_M);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_p,
&GDBRemoteCommunicationServerLLGS::Handle_p);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_P,
&GDBRemoteCommunicationServerLLGS::Handle_P);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qC,
&GDBRemoteCommunicationServerLLGS::Handle_qC);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qfThreadInfo,
&GDBRemoteCommunicationServerLLGS::Handle_qfThreadInfo);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qFileLoadAddress,
&GDBRemoteCommunicationServerLLGS::Handle_qFileLoadAddress);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qGetWorkingDir,
&GDBRemoteCommunicationServerLLGS::Handle_qGetWorkingDir);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfo,
&GDBRemoteCommunicationServerLLGS::Handle_qMemoryRegionInfo);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfoSupported,
&GDBRemoteCommunicationServerLLGS::Handle_qMemoryRegionInfoSupported);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qProcessInfo,
&GDBRemoteCommunicationServerLLGS::Handle_qProcessInfo);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qRegisterInfo,
&GDBRemoteCommunicationServerLLGS::Handle_qRegisterInfo);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_QRestoreRegisterState,
&GDBRemoteCommunicationServerLLGS::Handle_QRestoreRegisterState);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_QSaveRegisterState,
&GDBRemoteCommunicationServerLLGS::Handle_QSaveRegisterState);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_QSetDisableASLR,
&GDBRemoteCommunicationServerLLGS::Handle_QSetDisableASLR);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_QSetWorkingDir,
&GDBRemoteCommunicationServerLLGS::Handle_QSetWorkingDir);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qsThreadInfo,
&GDBRemoteCommunicationServerLLGS::Handle_qsThreadInfo);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qThreadStopInfo,
&GDBRemoteCommunicationServerLLGS::Handle_qThreadStopInfo);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_jThreadsInfo,
&GDBRemoteCommunicationServerLLGS::Handle_jThreadsInfo);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qWatchpointSupportInfo,
&GDBRemoteCommunicationServerLLGS::Handle_qWatchpointSupportInfo);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_qXfer_auxv_read,
&GDBRemoteCommunicationServerLLGS::Handle_qXfer_auxv_read);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_s,
&GDBRemoteCommunicationServerLLGS::Handle_s);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_stop_reason,
&GDBRemoteCommunicationServerLLGS::Handle_stop_reason); // ?
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_vAttach,
&GDBRemoteCommunicationServerLLGS::Handle_vAttach);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_vCont,
&GDBRemoteCommunicationServerLLGS::Handle_vCont);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_vCont_actions,
&GDBRemoteCommunicationServerLLGS::Handle_vCont_actions);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_x,
&GDBRemoteCommunicationServerLLGS::Handle_memory_read);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_Z,
&GDBRemoteCommunicationServerLLGS::Handle_Z);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_z,
&GDBRemoteCommunicationServerLLGS::Handle_z);
RegisterPacketHandler(StringExtractorGDBRemote::eServerPacketType_k,
[this](StringExtractorGDBRemote packet,
Error &error,
bool &interrupt,
bool &quit)
{
quit = true;
return this->Handle_k (packet);
});
}
Error
GDBRemoteCommunicationServerLLGS::SetLaunchArguments (const char *const args[], int argc)
{
if ((argc < 1) || !args || !args[0] || !args[0][0])
return Error ("%s: no process command line specified to launch", __FUNCTION__);
m_process_launch_info.SetArguments (const_cast<const char**> (args), true);
return Error ();
}
Error
GDBRemoteCommunicationServerLLGS::SetLaunchFlags (unsigned int launch_flags)
{
m_process_launch_info.GetFlags ().Set (launch_flags);
return Error ();
}
Error
GDBRemoteCommunicationServerLLGS::LaunchProcess ()
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (!m_process_launch_info.GetArguments ().GetArgumentCount ())
return Error ("%s: no process command line specified to launch", __FUNCTION__);
const bool should_forward_stdio = m_process_launch_info.GetFileActionForFD(STDIN_FILENO) == nullptr ||
m_process_launch_info.GetFileActionForFD(STDOUT_FILENO) == nullptr ||
m_process_launch_info.GetFileActionForFD(STDERR_FILENO) == nullptr;
m_process_launch_info.SetLaunchInSeparateProcessGroup(true);
m_process_launch_info.GetFlags().Set(eLaunchFlagDebug);
const bool default_to_use_pty = true;
m_process_launch_info.FinalizeFileActions(nullptr, default_to_use_pty);
Error error;
{
std::lock_guard<std::recursive_mutex> guard(m_debugged_process_mutex);
assert (!m_debugged_process_sp && "lldb-server creating debugged "
"process but one already exists");
error = NativeProcessProtocol::Launch(
m_process_launch_info,
*this,
m_mainloop,
m_debugged_process_sp);
}
if (!error.Success ())
{
fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0));
return error;
}
// Handle mirroring of inferior stdout/stderr over the gdb-remote protocol
// as needed.
// llgs local-process debugging may specify PTY paths, which will make these
// file actions non-null
// process launch -i/e/o will also make these file actions non-null
// nullptr means that the traffic is expected to flow over gdb-remote protocol
if (should_forward_stdio)
{
// nullptr means it's not redirected to file or pty (in case of LLGS local)
// at least one of stdio will be transferred pty<->gdb-remote
// we need to give the pty master handle to this object to read and/or write
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " setting up stdout/stderr redirection via $O gdb-remote commands", __FUNCTION__, m_debugged_process_sp->GetID ());
// Setup stdout/stderr mapping from inferior to $O
auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor ();
if (terminal_fd >= 0)
{
if (log)
log->Printf ("ProcessGDBRemoteCommunicationServerLLGS::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd);
error = SetSTDIOFileDescriptor (terminal_fd);
if (error.Fail ())
return error;
}
else
{
if (log)
log->Printf ("ProcessGDBRemoteCommunicationServerLLGS::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd);
}
}
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " skipping stdout/stderr redirection via $O: inferior will communicate over client-provided file descriptors", __FUNCTION__, m_debugged_process_sp->GetID ());
}
printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID ());
return error;
}
Error
GDBRemoteCommunicationServerLLGS::AttachToProcess (lldb::pid_t pid)
{
Error error;
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64, __FUNCTION__, pid);
// Before we try to attach, make sure we aren't already monitoring something else.
if (m_debugged_process_sp && m_debugged_process_sp->GetID() != LLDB_INVALID_PROCESS_ID)
return Error("cannot attach to a process %" PRIu64 " when another process with pid %" PRIu64 " is being debugged.", pid, m_debugged_process_sp->GetID());
// Try to attach.
error = NativeProcessProtocol::Attach(pid, *this, m_mainloop, m_debugged_process_sp);
if (!error.Success ())
{
fprintf (stderr, "%s: failed to attach to process %" PRIu64 ": %s", __FUNCTION__, pid, error.AsCString ());
return error;
}
// Setup stdout/stderr mapping from inferior.
auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor ();
if (terminal_fd >= 0)
{
if (log)
log->Printf ("ProcessGDBRemoteCommunicationServerLLGS::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd);
error = SetSTDIOFileDescriptor (terminal_fd);
if (error.Fail ())
return error;
}
else
{
if (log)
log->Printf ("ProcessGDBRemoteCommunicationServerLLGS::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd);
}
printf ("Attached to process %" PRIu64 "...\n", pid);
return error;
}
void
GDBRemoteCommunicationServerLLGS::InitializeDelegate (NativeProcessProtocol *process)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s called with NativeProcessProtocol pid %" PRIu64 ", current state: %s",
__FUNCTION__,
process->GetID (),
StateAsCString (process->GetState ()));
}
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::SendWResponse (NativeProcessProtocol *process)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// send W notification
ExitType exit_type = ExitType::eExitTypeInvalid;
int return_code = 0;
std::string exit_description;
const bool got_exit_info = process->GetExitStatus (&exit_type, &return_code, exit_description);
if (!got_exit_info)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 ", failed to retrieve process exit status", __FUNCTION__, process->GetID ());
StreamGDBRemote response;
response.PutChar ('E');
response.PutHex8 (GDBRemoteServerError::eErrorExitStatus);
return SendPacketNoLock(response.GetString());
}
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 ", returning exit type %d, return code %d [%s]", __FUNCTION__, process->GetID (), exit_type, return_code, exit_description.c_str ());
StreamGDBRemote response;
char return_type_code;
switch (exit_type)
{
case ExitType::eExitTypeExit:
return_type_code = 'W';
break;
case ExitType::eExitTypeSignal:
return_type_code = 'X';
break;
case ExitType::eExitTypeStop:
return_type_code = 'S';
break;
case ExitType::eExitTypeInvalid:
return_type_code = 'E';
break;
}
response.PutChar (return_type_code);
// POSIX exit status limited to unsigned 8 bits.
response.PutHex8 (return_code);
return SendPacketNoLock(response.GetString());
}
}
static void
AppendHexValue (StreamString &response, const uint8_t* buf, uint32_t buf_size, bool swap)
{
int64_t i;
if (swap)
{
for (i = buf_size-1; i >= 0; i--)
response.PutHex8 (buf[i]);
}
else
{
for (i = 0; i < buf_size; i++)
response.PutHex8 (buf[i]);
}
}
static void
WriteRegisterValueInHexFixedWidth (StreamString &response,
NativeRegisterContextSP &reg_ctx_sp,
const RegisterInfo &reg_info,
const RegisterValue *reg_value_p)
{
RegisterValue reg_value;
if (!reg_value_p)
{
Error error = reg_ctx_sp->ReadRegister (&reg_info, reg_value);
if (error.Success ())
reg_value_p = &reg_value;
// else log.
}
if (reg_value_p)
{
AppendHexValue (response, (const uint8_t*) reg_value_p->GetBytes (), reg_value_p->GetByteSize (), false);
}
else
{
// Zero-out any unreadable values.
if (reg_info.byte_size > 0)
{
std::basic_string<uint8_t> zeros(reg_info.byte_size, '\0');
AppendHexValue (response, zeros.data(), zeros.size(), false);
}
}
}
static JSONObject::SP
GetRegistersAsJSON(NativeThreadProtocol &thread, bool abridged)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD));
NativeRegisterContextSP reg_ctx_sp = thread.GetRegisterContext ();
if (! reg_ctx_sp)
return nullptr;
JSONObject::SP register_object_sp = std::make_shared<JSONObject>();
#ifdef LLDB_JTHREADSINFO_FULL_REGISTER_SET
// Expedite all registers in the first register set (i.e. should be GPRs) that are not contained in other registers.
const RegisterSet *reg_set_p = reg_ctx_sp->GetRegisterSet(0);
if (! reg_set_p)
return nullptr;
for (const uint32_t *reg_num_p = reg_set_p->registers; *reg_num_p != LLDB_INVALID_REGNUM; ++reg_num_p)
{
uint32_t reg_num = *reg_num_p;
#else
// Expedite only a couple of registers until we figure out why sending registers is
// expensive.
static const uint32_t k_expedited_registers[] = {
LLDB_REGNUM_GENERIC_PC, LLDB_REGNUM_GENERIC_SP, LLDB_REGNUM_GENERIC_FP, LLDB_REGNUM_GENERIC_RA, LLDB_INVALID_REGNUM
};
static const uint32_t k_abridged_expedited_registers[] = {
LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_REGNUM
};
for (const uint32_t *generic_reg_p = abridged ? k_abridged_expedited_registers : k_expedited_registers;
*generic_reg_p != LLDB_INVALID_REGNUM;
++generic_reg_p)
{
uint32_t reg_num = reg_ctx_sp->ConvertRegisterKindToRegisterNumber(eRegisterKindGeneric, *generic_reg_p);
if (reg_num == LLDB_INVALID_REGNUM)
continue; // Target does not support the given register.
#endif
const RegisterInfo *const reg_info_p = reg_ctx_sp->GetRegisterInfoAtIndex(reg_num);
if (reg_info_p == nullptr)
{
if (log)
log->Printf("%s failed to get register info for register index %" PRIu32,
__FUNCTION__, reg_num);
continue;
}
if (reg_info_p->value_regs != nullptr)
continue; // Only expedite registers that are not contained in other registers.
RegisterValue reg_value;
Error error = reg_ctx_sp->ReadRegister(reg_info_p, reg_value);
if (error.Fail())
{
if (log)
log->Printf("%s failed to read register '%s' index %" PRIu32 ": %s", __FUNCTION__,
reg_info_p->name ? reg_info_p->name : "<unnamed-register>", reg_num,
error.AsCString ());
continue;
}
StreamString stream;
WriteRegisterValueInHexFixedWidth(stream, reg_ctx_sp, *reg_info_p, &reg_value);
register_object_sp->SetObject(llvm::to_string(reg_num), std::make_shared<JSONString>(stream.GetString()));
}
return register_object_sp;
}
static const char *
GetStopReasonString(StopReason stop_reason)
{
switch (stop_reason)
{
case eStopReasonTrace:
return "trace";
case eStopReasonBreakpoint:
return "breakpoint";
case eStopReasonWatchpoint:
return "watchpoint";
case eStopReasonSignal:
return "signal";
case eStopReasonException:
return "exception";
case eStopReasonExec:
return "exec";
case eStopReasonInstrumentation:
case eStopReasonInvalid:
case eStopReasonPlanComplete:
case eStopReasonThreadExiting:
case eStopReasonNone:
break; // ignored
}
return nullptr;
}
static JSONArray::SP
GetJSONThreadsInfo(NativeProcessProtocol &process, bool abridged)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD));
JSONArray::SP threads_array_sp = std::make_shared<JSONArray>();
// Ensure we can get info on the given thread.
uint32_t thread_idx = 0;
for ( NativeThreadProtocolSP thread_sp;
(thread_sp = process.GetThreadAtIndex(thread_idx)) != nullptr;
++thread_idx)
{
lldb::tid_t tid = thread_sp->GetID();
// Grab the reason this thread stopped.
struct ThreadStopInfo tid_stop_info;
std::string description;
if (!thread_sp->GetStopReason (tid_stop_info, description))
return nullptr;
const int signum = tid_stop_info.details.signal.signo;
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " tid %" PRIu64 " got signal signo = %d, reason = %d, exc_type = %" PRIu64,
__FUNCTION__,
process.GetID (),
tid,
signum,
tid_stop_info.reason,
tid_stop_info.details.exception.type);
}
JSONObject::SP thread_obj_sp = std::make_shared<JSONObject>();
threads_array_sp->AppendObject(thread_obj_sp);
if (JSONObject::SP registers_sp = GetRegistersAsJSON(*thread_sp, abridged))
thread_obj_sp->SetObject("registers", registers_sp);
thread_obj_sp->SetObject("tid", std::make_shared<JSONNumber>(tid));
if (signum != 0)
thread_obj_sp->SetObject("signal", std::make_shared<JSONNumber>(signum));
const std::string thread_name = thread_sp->GetName ();
if (! thread_name.empty())
thread_obj_sp->SetObject("name", std::make_shared<JSONString>(thread_name));
if (const char *stop_reason_str = GetStopReasonString(tid_stop_info.reason))
thread_obj_sp->SetObject("reason", std::make_shared<JSONString>(stop_reason_str));
if (! description.empty())
thread_obj_sp->SetObject("description", std::make_shared<JSONString>(description));
if ((tid_stop_info.reason == eStopReasonException) && tid_stop_info.details.exception.type)
{
thread_obj_sp->SetObject("metype",
std::make_shared<JSONNumber>(tid_stop_info.details.exception.type));
JSONArray::SP medata_array_sp = std::make_shared<JSONArray>();
for (uint32_t i = 0; i < tid_stop_info.details.exception.data_count; ++i)
{
medata_array_sp->AppendObject(std::make_shared<JSONNumber>(
tid_stop_info.details.exception.data[i]));
}
thread_obj_sp->SetObject("medata", medata_array_sp);
}
// TODO: Expedite interesting regions of inferior memory
}
return threads_array_sp;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::SendStopReplyPacketForThread (lldb::tid_t tid)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD));
// Ensure we have a debugged process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (50);
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s preparing packet for pid %" PRIu64 " tid %" PRIu64,
__FUNCTION__, m_debugged_process_sp->GetID (), tid);
// Ensure we can get info on the given thread.
NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid));
if (!thread_sp)
return SendErrorResponse (51);
// Grab the reason this thread stopped.
struct ThreadStopInfo tid_stop_info;
std::string description;
if (!thread_sp->GetStopReason (tid_stop_info, description))
return SendErrorResponse (52);
// FIXME implement register handling for exec'd inferiors.
// if (tid_stop_info.reason == eStopReasonExec)
// {
// const bool force = true;
// InitializeRegisters(force);
// }
StreamString response;
// Output the T packet with the thread
response.PutChar ('T');
int signum = tid_stop_info.details.signal.signo;
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " tid %" PRIu64 " got signal signo = %d, reason = %d, exc_type = %" PRIu64,
__FUNCTION__,
m_debugged_process_sp->GetID (),
tid,
signum,
tid_stop_info.reason,
tid_stop_info.details.exception.type);
}
// Print the signal number.
response.PutHex8 (signum & 0xff);
// Include the tid.
response.Printf ("thread:%" PRIx64 ";", tid);
// Include the thread name if there is one.
const std::string thread_name = thread_sp->GetName ();
if (!thread_name.empty ())
{
size_t thread_name_len = thread_name.length ();
if (::strcspn (thread_name.c_str (), "$#+-;:") == thread_name_len)
{
response.PutCString ("name:");
response.PutCString (thread_name.c_str ());
}
else
{
// The thread name contains special chars, send as hex bytes.
response.PutCString ("hexname:");
response.PutCStringAsRawHex8 (thread_name.c_str ());
}
response.PutChar (';');
}
// If a 'QListThreadsInStopReply' was sent to enable this feature, we
// will send all thread IDs back in the "threads" key whose value is
// a list of hex thread IDs separated by commas:
// "threads:10a,10b,10c;"
// This will save the debugger from having to send a pair of qfThreadInfo
// and qsThreadInfo packets, but it also might take a lot of room in the
// stop reply packet, so it must be enabled only on systems where there
// are no limits on packet lengths.
if (m_list_threads_in_stop_reply)
{
response.PutCString ("threads:");
uint32_t thread_index = 0;
NativeThreadProtocolSP listed_thread_sp;
for (listed_thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index); listed_thread_sp; ++thread_index, listed_thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index))
{
if (thread_index > 0)
response.PutChar (',');
response.Printf ("%" PRIx64, listed_thread_sp->GetID ());
}
response.PutChar (';');
// Include JSON info that describes the stop reason for any threads
// that actually have stop reasons. We use the new "jstopinfo" key
// whose values is hex ascii JSON that contains the thread IDs
// thread stop info only for threads that have stop reasons. Only send
// this if we have more than one thread otherwise this packet has all
// the info it needs.
if (thread_index > 0)
{
const bool threads_with_valid_stop_info_only = true;
JSONArray::SP threads_info_sp = GetJSONThreadsInfo(*m_debugged_process_sp,
threads_with_valid_stop_info_only);
if (threads_info_sp)
{
response.PutCString("jstopinfo:");
StreamString unescaped_response;
threads_info_sp->Write(unescaped_response);
response.PutCStringAsRawHex8(unescaped_response.GetData());
response.PutChar(';');
}
else if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to prepare a jstopinfo field for pid %" PRIu64,
__FUNCTION__, m_debugged_process_sp->GetID());
}
}
//
// Expedite registers.
//
// Grab the register context.
NativeRegisterContextSP reg_ctx_sp = thread_sp->GetRegisterContext ();
if (reg_ctx_sp)
{
// Expedite all registers in the first register set (i.e. should be GPRs) that are not contained in other registers.
const RegisterSet *reg_set_p;
if (reg_ctx_sp->GetRegisterSetCount () > 0 && ((reg_set_p = reg_ctx_sp->GetRegisterSet (0)) != nullptr))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s expediting registers from set '%s' (registers set count: %zu)", __FUNCTION__, reg_set_p->name ? reg_set_p->name : "<unnamed-set>", reg_set_p->num_registers);
for (const uint32_t *reg_num_p = reg_set_p->registers; *reg_num_p != LLDB_INVALID_REGNUM; ++reg_num_p)
{
const RegisterInfo *const reg_info_p = reg_ctx_sp->GetRegisterInfoAtIndex (*reg_num_p);
if (reg_info_p == nullptr)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to get register info for register set '%s', register index %" PRIu32, __FUNCTION__, reg_set_p->name ? reg_set_p->name : "<unnamed-set>", *reg_num_p);
}
else if (reg_info_p->value_regs == nullptr)
{
// Only expediate registers that are not contained in other registers.
RegisterValue reg_value;
Error error = reg_ctx_sp->ReadRegister (reg_info_p, reg_value);
if (error.Success ())
{
response.Printf ("%.02x:", *reg_num_p);
WriteRegisterValueInHexFixedWidth(response, reg_ctx_sp, *reg_info_p, &reg_value);
response.PutChar (';');
}
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to read register '%s' index %" PRIu32 ": %s", __FUNCTION__, reg_info_p->name ? reg_info_p->name : "<unnamed-register>", *reg_num_p, error.AsCString ());
}
}
}
}
}
const char* reason_str = GetStopReasonString(tid_stop_info.reason);
if (reason_str != nullptr)
{
response.Printf ("reason:%s;", reason_str);
}
if (!description.empty())
{
// Description may contains special chars, send as hex bytes.
response.PutCString ("description:");
response.PutCStringAsRawHex8 (description.c_str ());
response.PutChar (';');
}
else if ((tid_stop_info.reason == eStopReasonException) && tid_stop_info.details.exception.type)
{
response.PutCString ("metype:");
response.PutHex64 (tid_stop_info.details.exception.type);
response.PutCString (";mecount:");
response.PutHex32 (tid_stop_info.details.exception.data_count);
response.PutChar (';');
for (uint32_t i = 0; i < tid_stop_info.details.exception.data_count; ++i)
{
response.PutCString ("medata:");
response.PutHex64 (tid_stop_info.details.exception.data[i]);
response.PutChar (';');
}
}
return SendPacketNoLock (response.GetString());
}
void
GDBRemoteCommunicationServerLLGS::HandleInferiorState_Exited (NativeProcessProtocol *process)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s called", __FUNCTION__);
PacketResult result = SendStopReasonForState(StateType::eStateExited);
if (result != PacketResult::Success)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ());
}
// Close the pipe to the inferior terminal i/o if we launched it
// and set one up.
MaybeCloseInferiorTerminalConnection ();
// We are ready to exit the debug monitor.
m_exit_now = true;
}
void
GDBRemoteCommunicationServerLLGS::HandleInferiorState_Stopped (NativeProcessProtocol *process)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s called", __FUNCTION__);
// Send the stop reason unless this is the stop after the
// launch or attach.
switch (m_inferior_prev_state)
{
case eStateLaunching:
case eStateAttaching:
// Don't send anything per debugserver behavior.
break;
default:
// In all other cases, send the stop reason.
PacketResult result = SendStopReasonForState(StateType::eStateStopped);
if (result != PacketResult::Success)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ());
}
break;
}
}
void
GDBRemoteCommunicationServerLLGS::ProcessStateChanged (NativeProcessProtocol *process, lldb::StateType state)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s called with NativeProcessProtocol pid %" PRIu64 ", state: %s",
__FUNCTION__,
process->GetID (),
StateAsCString (state));
}
switch (state)
{
case StateType::eStateRunning:
StartSTDIOForwarding();
break;
case StateType::eStateStopped:
// Make sure we get all of the pending stdout/stderr from the inferior
// and send it to the lldb host before we send the state change
// notification
SendProcessOutput();
// Then stop the forwarding, so that any late output (see llvm.org/pr25652) does not
// interfere with our protocol.
StopSTDIOForwarding();
HandleInferiorState_Stopped (process);
break;
case StateType::eStateExited:
// Same as above
SendProcessOutput();
StopSTDIOForwarding();
HandleInferiorState_Exited (process);
break;
default:
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s didn't handle state change for pid %" PRIu64 ", new state: %s",
__FUNCTION__,
process->GetID (),
StateAsCString (state));
}
break;
}
// Remember the previous state reported to us.
m_inferior_prev_state = state;
}
void
GDBRemoteCommunicationServerLLGS::DidExec (NativeProcessProtocol *process)
{
ClearProcessSpecificData ();
}
void
GDBRemoteCommunicationServerLLGS::DataAvailableCallback ()
{
Log *log (GetLogIfAnyCategoriesSet(GDBR_LOG_COMM));
if (! m_handshake_completed)
{
if (! HandshakeWithClient())
{
if(log)
log->Printf("GDBRemoteCommunicationServerLLGS::%s handshake with client failed, exiting",
__FUNCTION__);
m_mainloop.RequestTermination();
return;
}
m_handshake_completed = true;
}
bool interrupt = false;
bool done = false;
Error error;
while (true)
{
const PacketResult result = GetPacketAndSendResponse (0, error, interrupt, done);
if (result == PacketResult::ErrorReplyTimeout)
break; // No more packets in the queue
if ((result != PacketResult::Success))
{
if(log)
log->Printf("GDBRemoteCommunicationServerLLGS::%s processing a packet failed: %s",
__FUNCTION__, error.AsCString());
m_mainloop.RequestTermination();
break;
}
}
}
Error
GDBRemoteCommunicationServerLLGS::InitializeConnection (std::unique_ptr<Connection> &&connection)
{
IOObjectSP read_object_sp = connection->GetReadObject();
GDBRemoteCommunicationServer::SetConnection(connection.release());
Error error;
m_network_handle_up = m_mainloop.RegisterReadObject(read_object_sp,
[this] (MainLoopBase &) { DataAvailableCallback(); }, error);
return error;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::SendONotification (const char *buffer, uint32_t len)
{
if ((buffer == nullptr) || (len == 0))
{
// Nothing to send.
return PacketResult::Success;
}
StreamString response;
response.PutChar ('O');
response.PutBytesAsRawHex8 (buffer, len);
return SendPacketNoLock (response.GetString());
}
Error
GDBRemoteCommunicationServerLLGS::SetSTDIOFileDescriptor (int fd)
{
Error error;
// Set up the reading/handling of process I/O
std::unique_ptr<ConnectionFileDescriptor> conn_up (new ConnectionFileDescriptor (fd, true));
if (!conn_up)
{
error.SetErrorString ("failed to create ConnectionFileDescriptor");
return error;
}
m_stdio_communication.SetCloseOnEOF (false);
m_stdio_communication.SetConnection (conn_up.release());
if (!m_stdio_communication.IsConnected ())
{
error.SetErrorString ("failed to set connection for inferior I/O communication");
return error;
}
return Error();
}
void
GDBRemoteCommunicationServerLLGS::StartSTDIOForwarding()
{
// Don't forward if not connected (e.g. when attaching).
if (! m_stdio_communication.IsConnected())
return;
Error error;
lldbassert(! m_stdio_handle_up);
m_stdio_handle_up = m_mainloop.RegisterReadObject(
m_stdio_communication.GetConnection()->GetReadObject(),
[this] (MainLoopBase &) { SendProcessOutput(); }, error);
if (! m_stdio_handle_up)
{
// Not much we can do about the failure. Log it and continue without forwarding.
if (Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS))
log->Printf("GDBRemoteCommunicationServerLLGS::%s Failed to set up stdio forwarding: %s",
__FUNCTION__, error.AsCString());
}
}
void
GDBRemoteCommunicationServerLLGS::StopSTDIOForwarding()
{
m_stdio_handle_up.reset();
}
void
GDBRemoteCommunicationServerLLGS::SendProcessOutput()
{
char buffer[1024];
ConnectionStatus status;
Error error;
while (true)
{
size_t bytes_read = m_stdio_communication.Read(buffer, sizeof buffer, 0, status, &error);
switch (status)
{
case eConnectionStatusSuccess:
SendONotification(buffer, bytes_read);
break;
case eConnectionStatusLostConnection:
case eConnectionStatusEndOfFile:
case eConnectionStatusError:
case eConnectionStatusNoConnection:
if (Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS))
log->Printf("GDBRemoteCommunicationServerLLGS::%s Stopping stdio forwarding as communication returned status %d (error: %s)", __FUNCTION__, status, error.AsCString());
m_stdio_handle_up.reset();
return;
case eConnectionStatusInterrupted:
case eConnectionStatusTimedOut:
return;
}
}
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qProcessInfo (StringExtractorGDBRemote &packet)
{
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (68);
lldb::pid_t pid = m_debugged_process_sp->GetID ();
if (pid == LLDB_INVALID_PROCESS_ID)
return SendErrorResponse (1);
ProcessInstanceInfo proc_info;
if (!Host::GetProcessInfo (pid, proc_info))
return SendErrorResponse (1);
StreamString response;
CreateProcessInfoResponse_DebugServerStyle(proc_info, response);
return SendPacketNoLock (response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qC (StringExtractorGDBRemote &packet)
{
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (68);
// Make sure we set the current thread so g and p packets return
// the data the gdb will expect.
lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID ();
SetCurrentThreadID (tid);
NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetCurrentThread ();
if (!thread_sp)
return SendErrorResponse (69);
StreamString response;
response.Printf ("QC%" PRIx64, thread_sp->GetID ());
return SendPacketNoLock (response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_k (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
StopSTDIOForwarding();
if (! m_debugged_process_sp)
{
if (log)
log->Printf("GDBRemoteCommunicationServerLLGS::%s No debugged process found.", __FUNCTION__);
return PacketResult::Success;
}
Error error = m_debugged_process_sp->Kill();
if (error.Fail() && log)
log->Printf("GDBRemoteCommunicationServerLLGS::%s Failed to kill debugged process %" PRIu64 ": %s",
__FUNCTION__, m_debugged_process_sp->GetID(), error.AsCString());
// No OK response for kill packet.
// return SendOKResponse ();
return PacketResult::Success;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_QSetDisableASLR (StringExtractorGDBRemote &packet)
{
packet.SetFilePos(::strlen ("QSetDisableASLR:"));
if (packet.GetU32(0))
m_process_launch_info.GetFlags().Set (eLaunchFlagDisableASLR);
else
m_process_launch_info.GetFlags().Clear (eLaunchFlagDisableASLR);
return SendOKResponse ();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_QSetWorkingDir (StringExtractorGDBRemote &packet)
{
packet.SetFilePos (::strlen ("QSetWorkingDir:"));
std::string path;
packet.GetHexByteString (path);
m_process_launch_info.SetWorkingDirectory(FileSpec{path, true});
return SendOKResponse ();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qGetWorkingDir (StringExtractorGDBRemote &packet)
{
FileSpec working_dir{m_process_launch_info.GetWorkingDirectory()};
if (working_dir)
{
StreamString response;
response.PutCStringAsRawHex8(working_dir.GetCString());
return SendPacketNoLock(response.GetString());
}
return SendErrorResponse(14);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_C (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s called", __FUNCTION__);
// Ensure we have a native process.
if (!m_debugged_process_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s no debugged process shared pointer", __FUNCTION__);
return SendErrorResponse (0x36);
}
// Pull out the signal number.
packet.SetFilePos (::strlen ("C"));
if (packet.GetBytesLeft () < 1)
{
// Shouldn't be using a C without a signal.
return SendIllFormedResponse (packet, "C packet specified without signal.");
}
const uint32_t signo = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (signo == std::numeric_limits<uint32_t>::max ())
return SendIllFormedResponse (packet, "failed to parse signal number");
// Handle optional continue address.
if (packet.GetBytesLeft () > 0)
{
// FIXME add continue at address support for $C{signo}[;{continue-address}].
if (*packet.Peek () == ';')
return SendUnimplementedResponse (packet.GetStringRef().c_str());
else
return SendIllFormedResponse (packet, "unexpected content after $C{signal-number}");
}
ResumeActionList resume_actions (StateType::eStateRunning, 0);
Error error;
// We have two branches: what to do if a continue thread is specified (in which case we target
// sending the signal to that thread), or when we don't have a continue thread set (in which
// case we send a signal to the process).
// TODO discuss with Greg Clayton, make sure this makes sense.
lldb::tid_t signal_tid = GetContinueThreadID ();
if (signal_tid != LLDB_INVALID_THREAD_ID)
{
// The resume action for the continue thread (or all threads if a continue thread is not set).
ResumeAction action = { GetContinueThreadID (), StateType::eStateRunning, static_cast<int> (signo) };
// Add the action for the continue thread (or all threads when the continue thread isn't present).
resume_actions.Append (action);
}
else
{
// Send the signal to the process since we weren't targeting a specific continue thread with the signal.
error = m_debugged_process_sp->Signal (signo);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to send signal for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
return SendErrorResponse (0x52);
}
}
// Resume the threads.
error = m_debugged_process_sp->Resume (resume_actions);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to resume threads for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
return SendErrorResponse (0x38);
}
// Don't send an "OK" packet; response is the stopped/exited message.
return PacketResult::Success;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_c (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s called", __FUNCTION__);
packet.SetFilePos (packet.GetFilePos() + ::strlen ("c"));
// For now just support all continue.
const bool has_continue_address = (packet.GetBytesLeft () > 0);
if (has_continue_address)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s not implemented for c{address} variant [%s remains]", __FUNCTION__, packet.Peek ());
return SendUnimplementedResponse (packet.GetStringRef().c_str());
}
// Ensure we have a native process.
if (!m_debugged_process_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s no debugged process shared pointer", __FUNCTION__);
return SendErrorResponse (0x36);
}
// Build the ResumeActionList
ResumeActionList actions (StateType::eStateRunning, 0);
Error error = m_debugged_process_sp->Resume (actions);
if (error.Fail ())
{
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s c failed for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
}
return SendErrorResponse (GDBRemoteServerError::eErrorResume);
}
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ());
// No response required from continue.
return PacketResult::Success;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_vCont_actions (StringExtractorGDBRemote &packet)
{
StreamString response;
response.Printf("vCont;c;C;s;S");
return SendPacketNoLock(response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_vCont (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s handling vCont packet", __FUNCTION__);
packet.SetFilePos (::strlen ("vCont"));
if (packet.GetBytesLeft() == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s missing action from vCont package", __FUNCTION__);
return SendIllFormedResponse (packet, "Missing action from vCont package");
}
// Check if this is all continue (no options or ";c").
if (::strcmp (packet.Peek (), ";c") == 0)
{
// Move past the ';', then do a simple 'c'.
packet.SetFilePos (packet.GetFilePos () + 1);
return Handle_c (packet);
}
else if (::strcmp (packet.Peek (), ";s") == 0)
{
// Move past the ';', then do a simple 's'.
packet.SetFilePos (packet.GetFilePos () + 1);
return Handle_s (packet);
}
// Ensure we have a native process.
if (!m_debugged_process_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s no debugged process shared pointer", __FUNCTION__);
return SendErrorResponse (0x36);
}
ResumeActionList thread_actions;
while (packet.GetBytesLeft () && *packet.Peek () == ';')
{
// Skip the semi-colon.
packet.GetChar ();
// Build up the thread action.
ResumeAction thread_action;
thread_action.tid = LLDB_INVALID_THREAD_ID;
thread_action.state = eStateInvalid;
thread_action.signal = 0;
const char action = packet.GetChar ();
switch (action)
{
case 'C':
thread_action.signal = packet.GetHexMaxU32 (false, 0);
if (thread_action.signal == 0)
return SendIllFormedResponse (packet, "Could not parse signal in vCont packet C action");
LLVM_FALLTHROUGH;
case 'c':
// Continue
thread_action.state = eStateRunning;
break;
case 'S':
thread_action.signal = packet.GetHexMaxU32 (false, 0);
if (thread_action.signal == 0)
return SendIllFormedResponse (packet, "Could not parse signal in vCont packet S action");
LLVM_FALLTHROUGH;
case 's':
// Step
thread_action.state = eStateStepping;
break;
default:
return SendIllFormedResponse (packet, "Unsupported vCont action");
break;
}
// Parse out optional :{thread-id} value.
if (packet.GetBytesLeft () && (*packet.Peek () == ':'))
{
// Consume the separator.
packet.GetChar ();
thread_action.tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID);
if (thread_action.tid == LLDB_INVALID_THREAD_ID)
return SendIllFormedResponse (packet, "Could not parse thread number in vCont packet");
}
thread_actions.Append (thread_action);
}
Error error = m_debugged_process_sp->Resume (thread_actions);
if (error.Fail ())
{
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s vCont failed for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
}
return SendErrorResponse (GDBRemoteServerError::eErrorResume);
}
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ());
// No response required from vCont.
return PacketResult::Success;
}
void
GDBRemoteCommunicationServerLLGS::SetCurrentThreadID (lldb::tid_t tid)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s setting current thread id to %" PRIu64, __FUNCTION__, tid);
m_current_tid = tid;
if (m_debugged_process_sp)
m_debugged_process_sp->SetCurrentThreadID (m_current_tid);
}
void
GDBRemoteCommunicationServerLLGS::SetContinueThreadID (lldb::tid_t tid)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s setting continue thread id to %" PRIu64, __FUNCTION__, tid);
m_continue_tid = tid;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_stop_reason (StringExtractorGDBRemote &packet)
{
// Handle the $? gdbremote command.
// If no process, indicate error
if (!m_debugged_process_sp)
return SendErrorResponse (02);
return SendStopReasonForState (m_debugged_process_sp->GetState());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::SendStopReasonForState (lldb::StateType process_state)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
switch (process_state)
{
case eStateAttaching:
case eStateLaunching:
case eStateRunning:
case eStateStepping:
case eStateDetached:
// NOTE: gdb protocol doc looks like it should return $OK
// when everything is running (i.e. no stopped result).
return PacketResult::Success; // Ignore
case eStateSuspended:
case eStateStopped:
case eStateCrashed:
{
lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID ();
// Make sure we set the current thread so g and p packets return
// the data the gdb will expect.
SetCurrentThreadID (tid);
return SendStopReplyPacketForThread (tid);
}
case eStateInvalid:
case eStateUnloaded:
case eStateExited:
return SendWResponse(m_debugged_process_sp.get());
default:
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 ", current state reporting not handled: %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
StateAsCString (process_state));
}
break;
}
return SendErrorResponse (0);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qRegisterInfo (StringExtractorGDBRemote &packet)
{
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (68);
// Ensure we have a thread.
NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadAtIndex (0));
if (!thread_sp)
return SendErrorResponse (69);
// Get the register context for the first thread.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
return SendErrorResponse (69);
// Parse out the register number from the request.
packet.SetFilePos (strlen("qRegisterInfo"));
const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (reg_index == std::numeric_limits<uint32_t>::max ())
return SendErrorResponse (69);
// Return the end of registers response if we've iterated one past the end of the register set.
if (reg_index >= reg_context_sp->GetUserRegisterCount ())
return SendErrorResponse (69);
const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index);
if (!reg_info)
return SendErrorResponse (69);
// Build the reginfos response.
StreamGDBRemote response;
response.PutCString ("name:");
response.PutCString (reg_info->name);
response.PutChar (';');
if (reg_info->alt_name && reg_info->alt_name[0])
{
response.PutCString ("alt-name:");
response.PutCString (reg_info->alt_name);
response.PutChar (';');
}
response.Printf ("bitsize:%" PRIu32 ";offset:%" PRIu32 ";", reg_info->byte_size * 8, reg_info->byte_offset);
switch (reg_info->encoding)
{
case eEncodingUint: response.PutCString ("encoding:uint;"); break;
case eEncodingSint: response.PutCString ("encoding:sint;"); break;
case eEncodingIEEE754: response.PutCString ("encoding:ieee754;"); break;
case eEncodingVector: response.PutCString ("encoding:vector;"); break;
default: break;
}
switch (reg_info->format)
{
case eFormatBinary: response.PutCString ("format:binary;"); break;
case eFormatDecimal: response.PutCString ("format:decimal;"); break;
case eFormatHex: response.PutCString ("format:hex;"); break;
case eFormatFloat: response.PutCString ("format:float;"); break;
case eFormatVectorOfSInt8: response.PutCString ("format:vector-sint8;"); break;
case eFormatVectorOfUInt8: response.PutCString ("format:vector-uint8;"); break;
case eFormatVectorOfSInt16: response.PutCString ("format:vector-sint16;"); break;
case eFormatVectorOfUInt16: response.PutCString ("format:vector-uint16;"); break;
case eFormatVectorOfSInt32: response.PutCString ("format:vector-sint32;"); break;
case eFormatVectorOfUInt32: response.PutCString ("format:vector-uint32;"); break;
case eFormatVectorOfFloat32: response.PutCString ("format:vector-float32;"); break;
case eFormatVectorOfUInt128: response.PutCString ("format:vector-uint128;"); break;
default: break;
};
const char *const register_set_name = reg_context_sp->GetRegisterSetNameForRegisterAtIndex(reg_index);
if (register_set_name)
{
response.PutCString ("set:");
response.PutCString (register_set_name);
response.PutChar (';');
}
if (reg_info->kinds[RegisterKind::eRegisterKindEHFrame] != LLDB_INVALID_REGNUM)
response.Printf ("ehframe:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindEHFrame]);
if (reg_info->kinds[RegisterKind::eRegisterKindDWARF] != LLDB_INVALID_REGNUM)
response.Printf ("dwarf:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindDWARF]);
switch (reg_info->kinds[RegisterKind::eRegisterKindGeneric])
{
case LLDB_REGNUM_GENERIC_PC: response.PutCString("generic:pc;"); break;
case LLDB_REGNUM_GENERIC_SP: response.PutCString("generic:sp;"); break;
case LLDB_REGNUM_GENERIC_FP: response.PutCString("generic:fp;"); break;
case LLDB_REGNUM_GENERIC_RA: response.PutCString("generic:ra;"); break;
case LLDB_REGNUM_GENERIC_FLAGS: response.PutCString("generic:flags;"); break;
case LLDB_REGNUM_GENERIC_ARG1: response.PutCString("generic:arg1;"); break;
case LLDB_REGNUM_GENERIC_ARG2: response.PutCString("generic:arg2;"); break;
case LLDB_REGNUM_GENERIC_ARG3: response.PutCString("generic:arg3;"); break;
case LLDB_REGNUM_GENERIC_ARG4: response.PutCString("generic:arg4;"); break;
case LLDB_REGNUM_GENERIC_ARG5: response.PutCString("generic:arg5;"); break;
case LLDB_REGNUM_GENERIC_ARG6: response.PutCString("generic:arg6;"); break;
case LLDB_REGNUM_GENERIC_ARG7: response.PutCString("generic:arg7;"); break;
case LLDB_REGNUM_GENERIC_ARG8: response.PutCString("generic:arg8;"); break;
default: break;
}
if (reg_info->value_regs && reg_info->value_regs[0] != LLDB_INVALID_REGNUM)
{
response.PutCString ("container-regs:");
int i = 0;
for (const uint32_t *reg_num = reg_info->value_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i)
{
if (i > 0)
response.PutChar (',');
response.Printf ("%" PRIx32, *reg_num);
}
response.PutChar (';');
}
if (reg_info->invalidate_regs && reg_info->invalidate_regs[0])
{
response.PutCString ("invalidate-regs:");
int i = 0;
for (const uint32_t *reg_num = reg_info->invalidate_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i)
{
if (i > 0)
response.PutChar (',');
response.Printf ("%" PRIx32, *reg_num);
}
response.PutChar (';');
}
if (reg_info->dynamic_size_dwarf_expr_bytes)
{
const size_t dwarf_opcode_len = reg_info->dynamic_size_dwarf_len;
response.PutCString("dynamic_size_dwarf_expr_bytes:");
for(uint32_t i = 0; i < dwarf_opcode_len; ++i)
response.PutHex8 (reg_info->dynamic_size_dwarf_expr_bytes[i]);
response.PutChar(';');
}
return SendPacketNoLock(response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qfThreadInfo (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s() no process (%s), returning OK", __FUNCTION__, m_debugged_process_sp ? "invalid process id" : "null m_debugged_process_sp");
return SendOKResponse ();
}
StreamGDBRemote response;
response.PutChar ('m');
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s() starting thread iteration", __FUNCTION__);
NativeThreadProtocolSP thread_sp;
uint32_t thread_index;
for (thread_index = 0, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index);
thread_sp;
++thread_index, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s() iterated thread %" PRIu32 "(%s, tid=0x%" PRIx64 ")", __FUNCTION__, thread_index, thread_sp ? "is not null" : "null", thread_sp ? thread_sp->GetID () : LLDB_INVALID_THREAD_ID);
if (thread_index > 0)
response.PutChar(',');
response.Printf ("%" PRIx64, thread_sp->GetID ());
}
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s() finished thread iteration", __FUNCTION__);
return SendPacketNoLock(response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qsThreadInfo (StringExtractorGDBRemote &packet)
{
// FIXME for now we return the full thread list in the initial packet and always do nothing here.
return SendPacketNoLock ("l");
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_p (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Parse out the register number from the request.
packet.SetFilePos (strlen("p"));
const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (reg_index == std::numeric_limits<uint32_t>::max ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ());
return SendErrorResponse (0x15);
}
// Get the thread to use.
NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet);
if (!thread_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no thread available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Get the thread's register context.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ());
return SendErrorResponse (0x15);
}
// Return the end of registers response if we've iterated one past the end of the register set.
if (reg_index >= reg_context_sp->GetUserRegisterCount ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetUserRegisterCount ());
return SendErrorResponse (0x15);
}
const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index);
if (!reg_info)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index);
return SendErrorResponse (0x15);
}
// Build the reginfos response.
StreamGDBRemote response;
// Retrieve the value
RegisterValue reg_value;
Error error = reg_context_sp->ReadRegister (reg_info, reg_value);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, read of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ());
return SendErrorResponse (0x15);
}
const uint8_t *const data = reinterpret_cast<const uint8_t*> (reg_value.GetBytes ());
if (!data)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to get data bytes from requested register %" PRIu32, __FUNCTION__, reg_index);
return SendErrorResponse (0x15);
}
// FIXME flip as needed to get data in big/little endian format for this host.
for (uint32_t i = 0; i < reg_value.GetByteSize (); ++i)
response.PutHex8 (data[i]);
return SendPacketNoLock (response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_P (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Ensure there is more content.
if (packet.GetBytesLeft () < 1)
return SendIllFormedResponse (packet, "Empty P packet");
// Parse out the register number from the request.
packet.SetFilePos (strlen("P"));
const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (reg_index == std::numeric_limits<uint32_t>::max ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ());
return SendErrorResponse (0x29);
}
// Note debugserver would send an E30 here.
if ((packet.GetBytesLeft () < 1) || (packet.GetChar () != '='))
return SendIllFormedResponse (packet, "P packet missing '=' char after register number");
// Get process architecture.
ArchSpec process_arch;
if (!m_debugged_process_sp || !m_debugged_process_sp->GetArchitecture (process_arch))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to retrieve inferior architecture", __FUNCTION__);
return SendErrorResponse (0x49);
}
// Parse out the value.
uint8_t reg_bytes[32]; // big enough to support up to 256 bit ymmN register
size_t reg_size = packet.GetHexBytesAvail (reg_bytes);
// Get the thread to use.
NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet);
if (!thread_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no thread available (thread index 0)", __FUNCTION__);
return SendErrorResponse (0x28);
}
// Get the thread's register context.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ());
return SendErrorResponse (0x15);
}
const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex (reg_index);
if (!reg_info)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index);
return SendErrorResponse (0x48);
}
// Return the end of registers response if we've iterated one past the end of the register set.
if (reg_index >= reg_context_sp->GetUserRegisterCount ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetUserRegisterCount ());
return SendErrorResponse (0x47);
}
// The dwarf expression are evaluate on host site
// which may cause register size to change
// Hence the reg_size may not be same as reg_info->bytes_size
if ((reg_size != reg_info->byte_size) && !(reg_info->dynamic_size_dwarf_expr_bytes))
{
return SendIllFormedResponse (packet, "P packet register size is incorrect");
}
// Build the reginfos response.
StreamGDBRemote response;
RegisterValue reg_value (reg_bytes, reg_size, process_arch.GetByteOrder ());
Error error = reg_context_sp->WriteRegister (reg_info, reg_value);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, write of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ());
return SendErrorResponse (0x32);
}
return SendOKResponse();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_H (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out which variant of $H is requested.
packet.SetFilePos (strlen("H"));
if (packet.GetBytesLeft () < 1)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, H command missing {g,c} variant", __FUNCTION__);
return SendIllFormedResponse (packet, "H command missing {g,c} variant");
}
const char h_variant = packet.GetChar ();
switch (h_variant)
{
case 'g':
break;
case 'c':
break;
default:
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, invalid $H variant %c", __FUNCTION__, h_variant);
return SendIllFormedResponse (packet, "H variant unsupported, should be c or g");
}
// Parse out the thread number.
// FIXME return a parse success/fail value. All values are valid here.
const lldb::tid_t tid = packet.GetHexMaxU64 (false, std::numeric_limits<lldb::tid_t>::max ());
// Ensure we have the given thread when not specifying -1 (all threads) or 0 (any thread).
if (tid != LLDB_INVALID_THREAD_ID && tid != 0)
{
NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid));
if (!thread_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, tid %" PRIu64 " not found", __FUNCTION__, tid);
return SendErrorResponse (0x15);
}
}
// Now switch the given thread type.
switch (h_variant)
{
case 'g':
SetCurrentThreadID (tid);
break;
case 'c':
SetContinueThreadID (tid);
break;
default:
assert (false && "unsupported $H variant - shouldn't get here");
return SendIllFormedResponse (packet, "H variant unsupported, should be c or g");
}
return SendOKResponse();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_I (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
packet.SetFilePos (::strlen("I"));
uint8_t tmp[4096];
for (;;)
{
size_t read = packet.GetHexBytesAvail(tmp);
if (read == 0)
{
break;
}
// write directly to stdin *this might block if stdin buffer is full*
// TODO: enqueue this block in circular buffer and send window size to remote host
ConnectionStatus status;
Error error;
m_stdio_communication.Write(tmp, read, status, &error);
if (error.Fail())
{
return SendErrorResponse (0x15);
}
}
return SendOKResponse();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_interrupt (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD));
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Interrupt the process.
Error error = m_debugged_process_sp->Interrupt ();
if (error.Fail ())
{
if (log)
{
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
}
return SendErrorResponse (GDBRemoteServerError::eErrorResume);
}
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s stopped process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ());
// No response required from stop all.
return PacketResult::Success;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_memory_read(StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out the memory address.
packet.SetFilePos (strlen("m"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short m packet");
// Read the address. Punting on validation.
// FIXME replace with Hex U64 read with no default value that fails on failed read.
const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0);
// Validate comma.
if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ','))
return SendIllFormedResponse(packet, "Comma sep missing in m packet");
// Get # bytes to read.
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Length missing in m packet");
const uint64_t byte_count = packet.GetHexMaxU64(false, 0);
if (byte_count == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s nothing to read: zero-length packet", __FUNCTION__);
return SendOKResponse();
}
// Allocate the response buffer.
std::string buf(byte_count, '\0');
if (buf.empty())
return SendErrorResponse (0x78);
// Retrieve the process memory.
size_t bytes_read = 0;
Error error = m_debugged_process_sp->ReadMemoryWithoutTrap(read_addr, &buf[0], byte_count, bytes_read);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to read. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, error.AsCString ());
return SendErrorResponse (0x08);
}
if (bytes_read == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " mem 0x%" PRIx64 ": read 0 of %" PRIu64 " requested bytes", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, byte_count);
return SendErrorResponse (0x08);
}
StreamGDBRemote response;
packet.SetFilePos(0);
char kind = packet.GetChar('?');
if (kind == 'x')
response.PutEscapedBytes(buf.data(), byte_count);
else
{
assert(kind == 'm');
for (size_t i = 0; i < bytes_read; ++i)
response.PutHex8(buf[i]);
}
return SendPacketNoLock(response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_M (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out the memory address.
packet.SetFilePos (strlen("M"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short M packet");
// Read the address. Punting on validation.
// FIXME replace with Hex U64 read with no default value that fails on failed read.
const lldb::addr_t write_addr = packet.GetHexMaxU64(false, 0);
// Validate comma.
if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ','))
return SendIllFormedResponse(packet, "Comma sep missing in M packet");
// Get # bytes to read.
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Length missing in M packet");
const uint64_t byte_count = packet.GetHexMaxU64(false, 0);
if (byte_count == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s nothing to write: zero-length packet", __FUNCTION__);
return PacketResult::Success;
}
// Validate colon.
if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ':'))
return SendIllFormedResponse(packet, "Comma sep missing in M packet after byte length");
// Allocate the conversion buffer.
std::vector<uint8_t> buf(byte_count, 0);
if (buf.empty())
return SendErrorResponse (0x78);
// Convert the hex memory write contents to bytes.
StreamGDBRemote response;
const uint64_t convert_count = packet.GetHexBytes(buf, 0);
if (convert_count != byte_count)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " mem 0x%" PRIx64 ": asked to write %" PRIu64 " bytes, but only found %" PRIu64 " to convert.", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, byte_count, convert_count);
return SendIllFormedResponse (packet, "M content byte length specified did not match hex-encoded content length");
}
// Write the process memory.
size_t bytes_written = 0;
Error error = m_debugged_process_sp->WriteMemory (write_addr, &buf[0], byte_count, bytes_written);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to write. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, error.AsCString ());
return SendErrorResponse (0x09);
}
if (bytes_written == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " mem 0x%" PRIx64 ": wrote 0 of %" PRIu64 " requested bytes", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, byte_count);
return SendErrorResponse (0x09);
}
return SendOKResponse ();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qMemoryRegionInfoSupported (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Currently only the NativeProcessProtocol knows if it can handle a qMemoryRegionInfoSupported
// request, but we're not guaranteed to be attached to a process. For now we'll assume the
// client only asks this when a process is being debugged.
// Ensure we have a process running; otherwise, we can't figure this out
// since we won't have a NativeProcessProtocol.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Test if we can get any region back when asking for the region around NULL.
MemoryRegionInfo region_info;
const Error error = m_debugged_process_sp->GetMemoryRegionInfo (0, region_info);
if (error.Fail ())
{
// We don't support memory region info collection for this NativeProcessProtocol.
return SendUnimplementedResponse ("");
}
return SendOKResponse();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qMemoryRegionInfo (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Ensure we have a process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out the memory address.
packet.SetFilePos (strlen("qMemoryRegionInfo:"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short qMemoryRegionInfo: packet");
// Read the address. Punting on validation.
const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0);
StreamGDBRemote response;
// Get the memory region info for the target address.
MemoryRegionInfo region_info;
const Error error = m_debugged_process_sp->GetMemoryRegionInfo (read_addr, region_info);
if (error.Fail ())
{
// Return the error message.
response.PutCString ("error:");
response.PutCStringAsRawHex8 (error.AsCString ());
response.PutChar (';');
}
else
{
// Range start and size.
response.Printf ("start:%" PRIx64 ";size:%" PRIx64 ";", region_info.GetRange ().GetRangeBase (), region_info.GetRange ().GetByteSize ());
// Permissions.
if (region_info.GetReadable () ||
region_info.GetWritable () ||
region_info.GetExecutable ())
{
// Write permissions info.
response.PutCString ("permissions:");
if (region_info.GetReadable ())
response.PutChar ('r');
if (region_info.GetWritable ())
response.PutChar('w');
if (region_info.GetExecutable())
response.PutChar ('x');
response.PutChar (';');
}
// Name
ConstString name = region_info.GetName();
if (name)
{
response.PutCString("name:");
response.PutCStringAsRawHex8(name.AsCString());
response.PutChar(';');
}
}
return SendPacketNoLock(response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_Z (StringExtractorGDBRemote &packet)
{
// Ensure we have a process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out software or hardware breakpoint or watchpoint requested.
packet.SetFilePos (strlen("Z"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short Z packet, missing software/hardware specifier");
bool want_breakpoint = true;
bool want_hardware = false;
uint32_t watch_flags = 0;
const GDBStoppointType stoppoint_type =
GDBStoppointType(packet.GetS32 (eStoppointInvalid));
switch (stoppoint_type)
{
case eBreakpointSoftware:
want_hardware = false; want_breakpoint = true; break;
case eBreakpointHardware:
want_hardware = true; want_breakpoint = true; break;
case eWatchpointWrite:
watch_flags = 1;
want_hardware = true; want_breakpoint = false; break;
case eWatchpointRead:
watch_flags = 2;
want_hardware = true; want_breakpoint = false; break;
case eWatchpointReadWrite:
watch_flags = 3;
want_hardware = true; want_breakpoint = false; break;
case eStoppointInvalid:
return SendIllFormedResponse(packet, "Z packet had invalid software/hardware specifier");
}
if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',')
return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after stoppoint type");
// Parse out the stoppoint address.
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short Z packet, missing address");
const lldb::addr_t addr = packet.GetHexMaxU64(false, 0);
if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',')
return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after address");
// Parse out the stoppoint size (i.e. size hint for opcode size).
const uint32_t size = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (size == std::numeric_limits<uint32_t>::max ())
return SendIllFormedResponse(packet, "Malformed Z packet, failed to parse size argument");
if (want_breakpoint)
{
// Try to set the breakpoint.
const Error error = m_debugged_process_sp->SetBreakpoint (addr, size, want_hardware);
if (error.Success ())
return SendOKResponse ();
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64
" failed to set breakpoint: %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
return SendErrorResponse (0x09);
}
else
{
// Try to set the watchpoint.
const Error error = m_debugged_process_sp->SetWatchpoint (
addr, size, watch_flags, want_hardware);
if (error.Success ())
return SendOKResponse ();
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64
" failed to set watchpoint: %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
return SendErrorResponse (0x09);
}
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_z (StringExtractorGDBRemote &packet)
{
// Ensure we have a process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out software or hardware breakpoint or watchpoint requested.
packet.SetFilePos (strlen("z"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short z packet, missing software/hardware specifier");
bool want_breakpoint = true;
const GDBStoppointType stoppoint_type =
GDBStoppointType(packet.GetS32 (eStoppointInvalid));
switch (stoppoint_type)
{
case eBreakpointHardware: want_breakpoint = true; break;
case eBreakpointSoftware: want_breakpoint = true; break;
case eWatchpointWrite: want_breakpoint = false; break;
case eWatchpointRead: want_breakpoint = false; break;
case eWatchpointReadWrite: want_breakpoint = false; break;
default:
return SendIllFormedResponse(packet, "z packet had invalid software/hardware specifier");
}
if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',')
return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after stoppoint type");
// Parse out the stoppoint address.
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short z packet, missing address");
const lldb::addr_t addr = packet.GetHexMaxU64(false, 0);
if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',')
return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after address");
/*
// Parse out the stoppoint size (i.e. size hint for opcode size).
const uint32_t size = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (size == std::numeric_limits<uint32_t>::max ())
return SendIllFormedResponse(packet, "Malformed z packet, failed to parse size argument");
*/
if (want_breakpoint)
{
// Try to clear the breakpoint.
const Error error = m_debugged_process_sp->RemoveBreakpoint (addr);
if (error.Success ())
return SendOKResponse ();
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64
" failed to remove breakpoint: %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
return SendErrorResponse (0x09);
}
else
{
// Try to clear the watchpoint.
const Error error = m_debugged_process_sp->RemoveWatchpoint (addr);
if (error.Success ())
return SendOKResponse ();
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64
" failed to remove watchpoint: %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
return SendErrorResponse (0x09);
}
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_s (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD));
// Ensure we have a process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x32);
}
// We first try to use a continue thread id. If any one or any all set, use the current thread.
// Bail out if we don't have a thread id.
lldb::tid_t tid = GetContinueThreadID ();
if (tid == 0 || tid == LLDB_INVALID_THREAD_ID)
tid = GetCurrentThreadID ();
if (tid == LLDB_INVALID_THREAD_ID)
return SendErrorResponse (0x33);
// Double check that we have such a thread.
// TODO investigate: on MacOSX we might need to do an UpdateThreads () here.
NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetThreadByID (tid);
if (!thread_sp || thread_sp->GetID () != tid)
return SendErrorResponse (0x33);
// Create the step action for the given thread.
ResumeAction action = { tid, eStateStepping, 0 };
// Setup the actions list.
ResumeActionList actions;
actions.Append (action);
// All other threads stop while we're single stepping a thread.
actions.SetDefaultThreadActionIfNeeded(eStateStopped, 0);
Error error = m_debugged_process_sp->Resume (actions);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " tid %" PRIu64 " Resume() failed with error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), tid, error.AsCString ());
return SendErrorResponse(0x49);
}
// No response here - the stop or exit will come from the resulting action.
return PacketResult::Success;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qXfer_auxv_read (StringExtractorGDBRemote &packet)
{
// *BSD impls should be able to do this too.
#if defined(__linux__)
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Parse out the offset.
packet.SetFilePos (strlen("qXfer:auxv:read::"));
if (packet.GetBytesLeft () < 1)
return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset");
const uint64_t auxv_offset = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ());
if (auxv_offset == std::numeric_limits<uint64_t>::max ())
return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset");
// Parse out comma.
if (packet.GetBytesLeft () < 1 || packet.GetChar () != ',')
return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing comma after offset");
// Parse out the length.
const uint64_t auxv_length = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ());
if (auxv_length == std::numeric_limits<uint64_t>::max ())
return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing length");
// Grab the auxv data if we need it.
if (!m_active_auxv_buffer_sp)
{
// Make sure we have a valid process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x10);
}
// Grab the auxv data.
m_active_auxv_buffer_sp = Host::GetAuxvData (m_debugged_process_sp->GetID ());
if (!m_active_auxv_buffer_sp || m_active_auxv_buffer_sp->GetByteSize () == 0)
{
// Hmm, no auxv data, call that an error.
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no auxv data retrieved", __FUNCTION__);
m_active_auxv_buffer_sp.reset ();
return SendErrorResponse (0x11);
}
}
// FIXME find out if/how I lock the stream here.
StreamGDBRemote response;
bool done_with_buffer = false;
if (auxv_offset >= m_active_auxv_buffer_sp->GetByteSize ())
{
// We have nothing left to send. Mark the buffer as complete.
response.PutChar ('l');
done_with_buffer = true;
}
else
{
// Figure out how many bytes are available starting at the given offset.
const uint64_t bytes_remaining = m_active_auxv_buffer_sp->GetByteSize () - auxv_offset;
// Figure out how many bytes we're going to read.
const uint64_t bytes_to_read = (auxv_length > bytes_remaining) ? bytes_remaining : auxv_length;
// Mark the response type according to whether we're reading the remainder of the auxv data.
if (bytes_to_read >= bytes_remaining)
{
// There will be nothing left to read after this
response.PutChar ('l');
done_with_buffer = true;
}
else
{
// There will still be bytes to read after this request.
response.PutChar ('m');
}
// Now write the data in encoded binary form.
response.PutEscapedBytes (m_active_auxv_buffer_sp->GetBytes () + auxv_offset, bytes_to_read);
}
if (done_with_buffer)
m_active_auxv_buffer_sp.reset ();
return SendPacketNoLock(response.GetString());
#else
return SendUnimplementedResponse ("not implemented on this platform");
#endif
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_QSaveRegisterState (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Move past packet name.
packet.SetFilePos (strlen ("QSaveRegisterState"));
// Get the thread to use.
NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet);
if (!thread_sp)
{
if (m_thread_suffix_supported)
return SendIllFormedResponse (packet, "No thread specified in QSaveRegisterState packet");
else
return SendIllFormedResponse (packet, "No thread was is set with the Hg packet");
}
// Grab the register context for the thread.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ());
return SendErrorResponse (0x15);
}
// Save registers to a buffer.
DataBufferSP register_data_sp;
Error error = reg_context_sp->ReadAllRegisterValues (register_data_sp);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " failed to save all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ());
return SendErrorResponse (0x75);
}
// Allocate a new save id.
const uint32_t save_id = GetNextSavedRegistersID ();
assert ((m_saved_registers_map.find (save_id) == m_saved_registers_map.end ()) && "GetNextRegisterSaveID() returned an existing register save id");
// Save the register data buffer under the save id.
{
std::lock_guard<std::mutex> guard(m_saved_registers_mutex);
m_saved_registers_map[save_id] = register_data_sp;
}
// Write the response.
StreamGDBRemote response;
response.Printf ("%" PRIu32, save_id);
return SendPacketNoLock(response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_QRestoreRegisterState (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Parse out save id.
packet.SetFilePos (strlen ("QRestoreRegisterState:"));
if (packet.GetBytesLeft () < 1)
return SendIllFormedResponse (packet, "QRestoreRegisterState packet missing register save id");
const uint32_t save_id = packet.GetU32 (0);
if (save_id == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s QRestoreRegisterState packet has malformed save id, expecting decimal uint32_t", __FUNCTION__);
return SendErrorResponse (0x76);
}
// Get the thread to use.
NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet);
if (!thread_sp)
{
if (m_thread_suffix_supported)
return SendIllFormedResponse (packet, "No thread specified in QRestoreRegisterState packet");
else
return SendIllFormedResponse (packet, "No thread was is set with the Hg packet");
}
// Grab the register context for the thread.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ());
return SendErrorResponse (0x15);
}
// Retrieve register state buffer, then remove from the list.
DataBufferSP register_data_sp;
{
std::lock_guard<std::mutex> guard(m_saved_registers_mutex);
// Find the register set buffer for the given save id.
auto it = m_saved_registers_map.find (save_id);
if (it == m_saved_registers_map.end ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " does not have a register set save buffer for id %" PRIu32, __FUNCTION__, m_debugged_process_sp->GetID (), save_id);
return SendErrorResponse (0x77);
}
register_data_sp = it->second;
// Remove it from the map.
m_saved_registers_map.erase (it);
}
Error error = reg_context_sp->WriteAllRegisterValues (register_data_sp);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s pid %" PRIu64 " failed to restore all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ());
return SendErrorResponse (0x77);
}
return SendOKResponse();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_vAttach (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Consume the ';' after vAttach.
packet.SetFilePos (strlen ("vAttach"));
if (!packet.GetBytesLeft () || packet.GetChar () != ';')
return SendIllFormedResponse (packet, "vAttach missing expected ';'");
// Grab the PID to which we will attach (assume hex encoding).
lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16);
if (pid == LLDB_INVALID_PROCESS_ID)
return SendIllFormedResponse (packet, "vAttach failed to parse the process id");
// Attempt to attach.
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s attempting to attach to pid %" PRIu64, __FUNCTION__, pid);
Error error = AttachToProcess (pid);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to attach to pid %" PRIu64 ": %s\n", __FUNCTION__, pid, error.AsCString());
return SendErrorResponse (0x01);
}
// Notify we attached by sending a stop packet.
return SendStopReasonForState (m_debugged_process_sp->GetState ());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_D (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS));
StopSTDIOForwarding();
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
// Consume the ';' after D.
packet.SetFilePos (1);
if (packet.GetBytesLeft ())
{
if (packet.GetChar () != ';')
return SendIllFormedResponse (packet, "D missing expected ';'");
// Grab the PID from which we will detach (assume hex encoding).
pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16);
if (pid == LLDB_INVALID_PROCESS_ID)
return SendIllFormedResponse (packet, "D failed to parse the process id");
}
if (pid != LLDB_INVALID_PROCESS_ID &&
m_debugged_process_sp->GetID () != pid)
{
return SendIllFormedResponse (packet, "Invalid pid");
}
const Error error = m_debugged_process_sp->Detach ();
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to detach from pid %" PRIu64 ": %s\n",
__FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ());
return SendErrorResponse (0x01);
}
return SendOKResponse ();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qThreadStopInfo (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
packet.SetFilePos (strlen("qThreadStopInfo"));
const lldb::tid_t tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID);
if (tid == LLDB_INVALID_THREAD_ID)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed, could not parse thread id from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ());
return SendErrorResponse (0x15);
}
return SendStopReplyPacketForThread (tid);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_jThreadsInfo (StringExtractorGDBRemote &)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD));
// Ensure we have a debugged process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (50);
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s preparing packet for pid %" PRIu64,
__FUNCTION__, m_debugged_process_sp->GetID());
StreamString response;
const bool threads_with_valid_stop_info_only = false;
JSONArray::SP threads_array_sp = GetJSONThreadsInfo(*m_debugged_process_sp,
threads_with_valid_stop_info_only);
if (! threads_array_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s failed to prepare a packet for pid %" PRIu64,
__FUNCTION__, m_debugged_process_sp->GetID());
return SendErrorResponse(52);
}
threads_array_sp->Write(response);
StreamGDBRemote escaped_response;
escaped_response.PutEscapedBytes(response.GetData(), response.GetSize());
return SendPacketNoLock (escaped_response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qWatchpointSupportInfo (StringExtractorGDBRemote &packet)
{
// Fail if we don't have a current process.
if (!m_debugged_process_sp ||
m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)
return SendErrorResponse (68);
packet.SetFilePos(strlen("qWatchpointSupportInfo"));
if (packet.GetBytesLeft() == 0)
return SendOKResponse();
if (packet.GetChar() != ':')
return SendErrorResponse(67);
uint32_t num = m_debugged_process_sp->GetMaxWatchpoints();
StreamGDBRemote response;
response.Printf ("num:%d;", num);
return SendPacketNoLock(response.GetString());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerLLGS::Handle_qFileLoadAddress (StringExtractorGDBRemote &packet)
{
// Fail if we don't have a current process.
if (!m_debugged_process_sp ||
m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)
return SendErrorResponse(67);
packet.SetFilePos(strlen("qFileLoadAddress:"));
if (packet.GetBytesLeft() == 0)
return SendErrorResponse(68);
std::string file_name;
packet.GetHexByteString(file_name);
lldb::addr_t file_load_address = LLDB_INVALID_ADDRESS;
Error error = m_debugged_process_sp->GetFileLoadAddress(file_name, file_load_address);
if (error.Fail())
return SendErrorResponse(69);
if (file_load_address == LLDB_INVALID_ADDRESS)
return SendErrorResponse(1); // File not loaded
StreamGDBRemote response;
response.PutHex64(file_load_address);
return SendPacketNoLock(response.GetString());
}
void
GDBRemoteCommunicationServerLLGS::MaybeCloseInferiorTerminalConnection ()
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Tell the stdio connection to shut down.
if (m_stdio_communication.IsConnected())
{
auto connection = m_stdio_communication.GetConnection();
if (connection)
{
Error error;
connection->Disconnect (&error);
if (error.Success ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s disconnect process terminal stdio - SUCCESS", __FUNCTION__);
}
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s disconnect process terminal stdio - FAIL: %s", __FUNCTION__, error.AsCString ());
}
}
}
}
NativeThreadProtocolSP
GDBRemoteCommunicationServerLLGS::GetThreadFromSuffix (StringExtractorGDBRemote &packet)
{
NativeThreadProtocolSP thread_sp;
// We have no thread if we don't have a process.
if (!m_debugged_process_sp || m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)
return thread_sp;
// If the client hasn't asked for thread suffix support, there will not be a thread suffix.
// Use the current thread in that case.
if (!m_thread_suffix_supported)
{
const lldb::tid_t current_tid = GetCurrentThreadID ();
if (current_tid == LLDB_INVALID_THREAD_ID)
return thread_sp;
else if (current_tid == 0)
{
// Pick a thread.
return m_debugged_process_sp->GetThreadAtIndex (0);
}
else
return m_debugged_process_sp->GetThreadByID (current_tid);
}
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Parse out the ';'.
if (packet.GetBytesLeft () < 1 || packet.GetChar () != ';')
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s gdb-remote parse error: expected ';' prior to start of thread suffix: packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ());
return thread_sp;
}
if (!packet.GetBytesLeft ())
return thread_sp;
// Parse out thread: portion.
if (strncmp (packet.Peek (), "thread:", strlen("thread:")) != 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s gdb-remote parse error: expected 'thread:' but not found, packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ());
return thread_sp;
}
packet.SetFilePos (packet.GetFilePos () + strlen("thread:"));
const lldb::tid_t tid = packet.GetHexMaxU64(false, 0);
if (tid != 0)
return m_debugged_process_sp->GetThreadByID (tid);
return thread_sp;
}
lldb::tid_t
GDBRemoteCommunicationServerLLGS::GetCurrentThreadID () const
{
if (m_current_tid == 0 || m_current_tid == LLDB_INVALID_THREAD_ID)
{
// Use whatever the debug process says is the current thread id
// since the protocol either didn't specify or specified we want
// any/all threads marked as the current thread.
if (!m_debugged_process_sp)
return LLDB_INVALID_THREAD_ID;
return m_debugged_process_sp->GetCurrentThreadID ();
}
// Use the specific current thread id set by the gdb remote protocol.
return m_current_tid;
}
uint32_t
GDBRemoteCommunicationServerLLGS::GetNextSavedRegistersID ()
{
std::lock_guard<std::mutex> guard(m_saved_registers_mutex);
return m_next_saved_registers_id++;
}
void
GDBRemoteCommunicationServerLLGS::ClearProcessSpecificData ()
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|GDBR_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s()", __FUNCTION__);
// Clear any auxv cached data.
// *BSD impls should be able to do this too.
#if defined(__linux__)
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s clearing auxv buffer (previously %s)",
__FUNCTION__,
m_active_auxv_buffer_sp ? "was set" : "was not set");
m_active_auxv_buffer_sp.reset ();
#endif
}
FileSpec
GDBRemoteCommunicationServerLLGS::FindModuleFile(const std::string& module_path,
const ArchSpec& arch)
{
if (m_debugged_process_sp)
{
FileSpec file_spec;
if (m_debugged_process_sp->GetLoadedModuleFileSpec(module_path.c_str(), file_spec).Success())
{
if (file_spec.Exists())
return file_spec;
}
}
return GDBRemoteCommunicationServerCommon::FindModuleFile(module_path, arch);
}
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