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//===-- ThreadKDP.cpp -------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ThreadKDP.h"
#include "lldb/Utility/SafeMachO.h"
#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Core/State.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Unwind.h"
#include "lldb/Breakpoint/Watchpoint.h"
#include "ProcessKDP.h"
#include "ProcessKDPLog.h"
#include "RegisterContextKDP_arm.h"
#include "RegisterContextKDP_arm64.h"
#include "RegisterContextKDP_i386.h"
#include "RegisterContextKDP_x86_64.h"
#include "Plugins/Process/Utility/StopInfoMachException.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// Thread Registers
//----------------------------------------------------------------------
ThreadKDP::ThreadKDP (Process &process, lldb::tid_t tid) :
Thread(process, tid),
m_thread_name (),
m_dispatch_queue_name (),
m_thread_dispatch_qaddr (LLDB_INVALID_ADDRESS)
{
ProcessKDPLog::LogIf(KDP_LOG_THREAD, "%p: ThreadKDP::ThreadKDP (tid = 0x%4.4x)", this, GetID());
}
ThreadKDP::~ThreadKDP ()
{
ProcessKDPLog::LogIf(KDP_LOG_THREAD, "%p: ThreadKDP::~ThreadKDP (tid = 0x%4.4x)", this, GetID());
DestroyThread();
}
const char *
ThreadKDP::GetName ()
{
if (m_thread_name.empty())
return NULL;
return m_thread_name.c_str();
}
const char *
ThreadKDP::GetQueueName ()
{
return NULL;
}
void
ThreadKDP::RefreshStateAfterStop()
{
// Invalidate all registers in our register context. We don't set "force" to
// true because the stop reply packet might have had some register values
// that were expedited and these will already be copied into the register
// context by the time this function gets called. The KDPRegisterContext
// class has been made smart enough to detect when it needs to invalidate
// which registers are valid by putting hooks in the register read and
// register supply functions where they check the process stop ID and do
// the right thing.
const bool force = false;
lldb::RegisterContextSP reg_ctx_sp (GetRegisterContext());
if (reg_ctx_sp)
reg_ctx_sp->InvalidateIfNeeded (force);
}
bool
ThreadKDP::ThreadIDIsValid (lldb::tid_t thread)
{
return thread != 0;
}
void
ThreadKDP::Dump(Log *log, uint32_t index)
{
}
bool
ThreadKDP::ShouldStop (bool &step_more)
{
return true;
}
lldb::RegisterContextSP
ThreadKDP::GetRegisterContext ()
{
if (m_reg_context_sp.get() == NULL)
m_reg_context_sp = CreateRegisterContextForFrame (NULL);
return m_reg_context_sp;
}
lldb::RegisterContextSP
ThreadKDP::CreateRegisterContextForFrame (StackFrame *frame)
{
lldb::RegisterContextSP reg_ctx_sp;
uint32_t concrete_frame_idx = 0;
if (frame)
concrete_frame_idx = frame->GetConcreteFrameIndex ();
if (concrete_frame_idx == 0)
{
ProcessSP process_sp (CalculateProcess());
if (process_sp)
{
switch (static_cast<ProcessKDP *>(process_sp.get())->GetCommunication().GetCPUType())
{
case llvm::MachO::CPU_TYPE_ARM:
reg_ctx_sp.reset (new RegisterContextKDP_arm (*this, concrete_frame_idx));
break;
case llvm::MachO::CPU_TYPE_ARM64:
reg_ctx_sp.reset (new RegisterContextKDP_arm64 (*this, concrete_frame_idx));
break;
case llvm::MachO::CPU_TYPE_I386:
reg_ctx_sp.reset (new RegisterContextKDP_i386 (*this, concrete_frame_idx));
break;
case llvm::MachO::CPU_TYPE_X86_64:
reg_ctx_sp.reset (new RegisterContextKDP_x86_64 (*this, concrete_frame_idx));
break;
default:
assert (!"Add CPU type support in KDP");
break;
}
}
}
else
{
Unwind *unwinder = GetUnwinder ();
if (unwinder)
reg_ctx_sp = unwinder->CreateRegisterContextForFrame (frame);
}
return reg_ctx_sp;
}
bool
ThreadKDP::CalculateStopInfo ()
{
ProcessSP process_sp (GetProcess());
if (process_sp)
{
if (m_cached_stop_info_sp)
{
SetStopInfo (m_cached_stop_info_sp);
}
else
{
SetStopInfo(StopInfo::CreateStopReasonWithSignal (*this, SIGSTOP));
}
return true;
}
return false;
}
void
ThreadKDP::SetStopInfoFrom_KDP_EXCEPTION (const DataExtractor &exc_reply_packet)
{
lldb::offset_t offset = 0;
uint8_t reply_command = exc_reply_packet.GetU8(&offset);
if (reply_command == CommunicationKDP::KDP_EXCEPTION)
{
offset = 8;
const uint32_t count = exc_reply_packet.GetU32 (&offset);
if (count >= 1)
{
//const uint32_t cpu = exc_reply_packet.GetU32 (&offset);
offset += 4; // Skip the useless CPU field
const uint32_t exc_type = exc_reply_packet.GetU32 (&offset);
const uint32_t exc_code = exc_reply_packet.GetU32 (&offset);
const uint32_t exc_subcode = exc_reply_packet.GetU32 (&offset);
// We have to make a copy of the stop info because the thread list
// will iterate through the threads and clear all stop infos..
// Let the StopInfoMachException::CreateStopReasonWithMachException()
// function update the PC if needed as we might hit a software breakpoint
// and need to decrement the PC (i386 and x86_64 need this) and KDP
// doesn't do this for us.
const bool pc_already_adjusted = false;
const bool adjust_pc_if_needed = true;
m_cached_stop_info_sp = StopInfoMachException::CreateStopReasonWithMachException (*this,
exc_type,
2,
exc_code,
exc_subcode,
0,
pc_already_adjusted,
adjust_pc_if_needed);
}
}
}
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