1 files changed, 247 insertions, 0 deletions
diff --git a/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.cpp b/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.cpp
new file mode 100644
index 00000000000..dac551762f3
--- /dev/null
+++ b/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.cpp
@@ -0,0 +1,247 @@
+//===-- 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 "llvm/Support/MachO.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/WatchpointLocation.h"
+
+#include "ProcessKDP.h"
+#include "ProcessKDPLog.h"
+#include "RegisterContextKDP_arm.h"
+#include "RegisterContextKDP_i386.h"
+#include "RegisterContextKDP_x86_64.h"
+#include "Plugins/Process/Utility/UnwindLLDB.h"
+
+#if defined(__APPLE__)
+#include "UnwindMacOSXFrameBackchain.h"
+#endif
+
+using namespace lldb;
+using namespace lldb_private;
+
+//----------------------------------------------------------------------
+// Thread Registers
+//----------------------------------------------------------------------
+
+ThreadKDP::ThreadKDP (ProcessKDP &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 (pid = %i, tid = 0x%4.4x)", this, m_process.GetID(), GetID());
+}
+
+ThreadKDP::~ThreadKDP ()
+{
+    ProcessKDPLog::LogIf(KDP_LOG_THREAD, "%p: ThreadKDP::~ThreadKDP (pid = %i, tid = 0x%4.4x)", this, m_process.GetID(), GetID());
+    DestroyThread();
+}
+
+
+const char *
+ThreadKDP::GetInfo ()
+{
+    return NULL;
+}
+
+
+const char *
+ThreadKDP::GetName ()
+{
+    if (m_thread_name.empty())
+        return NULL;
+    return m_thread_name.c_str();
+}
+
+const char *
+ThreadKDP::GetQueueName ()
+{
+    return NULL;
+}
+
+bool
+ThreadKDP::WillResume (StateType resume_state)
+{
+    ClearStackFrames();
+    // Call the Thread::WillResume first. If we stop at a signal, the stop info
+    // class for signal will set the resume signal that we need below. The signal
+    // stuff obeys the Process::UnixSignal defaults. 
+    Thread::WillResume(resume_state);
+
+    lldb::LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STEP));
+    if (log)
+        log->Printf ("Resuming thread: %4.4x with state: %s.", GetID(), StateAsCString(resume_state));
+
+//    ProcessKDP &process = GetKDPProcess();
+//    switch (resume_state)
+//    {
+//    case eStateSuspended:
+//    case eStateStopped:
+//        // Don't append anything for threads that should stay stopped.
+//        break;
+//
+//    case eStateRunning:
+//    case eStateStepping:
+//        break;
+//
+//    default:
+//        break;
+//    }
+    return true;
+}
+
+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;
+    GetRegisterContext()->InvalidateIfNeeded (force);
+}
+
+Unwind *
+ThreadKDP::GetUnwinder ()
+{
+    if (m_unwinder_ap.get() == NULL)
+    {
+        const ArchSpec target_arch (GetProcess().GetTarget().GetArchitecture ());
+        const llvm::Triple::ArchType machine = target_arch.GetMachine();
+        switch (machine)
+        {
+            case llvm::Triple::x86_64:
+            case llvm::Triple::x86:
+            case llvm::Triple::arm:
+            case llvm::Triple::thumb:
+                m_unwinder_ap.reset (new UnwindLLDB (*this));
+                break;
+
+            default:
+#if defined(__APPLE__)
+                m_unwinder_ap.reset (new UnwindMacOSXFrameBackchain (*this));
+#endif
+                break;
+        }
+    }
+    return m_unwinder_ap.get();
+}
+
+void
+ThreadKDP::ClearStackFrames ()
+{
+    Unwind *unwinder = GetUnwinder ();
+    if (unwinder)
+        unwinder->Clear();
+    Thread::ClearStackFrames();
+}
+
+
+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)
+    {
+        switch (GetKDPProcess().GetCommunication().GetCPUType())
+        {
+            case llvm::MachO::CPUTypeARM:
+                reg_ctx_sp.reset (new RegisterContextKDP_arm (*this, concrete_frame_idx));
+                break;
+            case llvm::MachO::CPUTypeI386:
+                reg_ctx_sp.reset (new RegisterContextKDP_i386 (*this, concrete_frame_idx));
+                break;
+            case llvm::MachO::CPUTypeX86_64:
+                reg_ctx_sp.reset (new RegisterContextKDP_x86_64 (*this, concrete_frame_idx));
+                break;
+            default:
+                assert (!"Add CPU type support in KDP");
+                break;
+        }
+    }
+    else if (m_unwinder_ap.get())
+        reg_ctx_sp = m_unwinder_ap->CreateRegisterContextForFrame (frame);
+    return reg_ctx_sp;
+}
+
+lldb::StopInfoSP
+ThreadKDP::GetPrivateStopReason ()
+{
+    const uint32_t process_stop_id = GetProcess().GetStopID();
+    if (m_thread_stop_reason_stop_id != process_stop_id ||
+        (m_actual_stop_info_sp && !m_actual_stop_info_sp->IsValid()))
+    {
+        // TODO: can we query the initial state of the thread here?
+        // For now I am just going to pretend that a SIGSTOP happened.
+
+        SetStopInfo(StopInfo::CreateStopReasonWithSignal (*this, SIGSTOP));
+
+        // If GetKDPProcess().SetThreadStopInfo() doesn't find a stop reason
+        // for this thread, then m_actual_stop_info_sp will not ever contain
+        // a valid stop reason and the "m_actual_stop_info_sp->IsValid() == false"
+        // check will never be able to tell us if we have the correct stop info
+        // for this thread and we will continually send qThreadStopInfo packets
+        // down to the remote KDP server, so we need to keep our own notion
+        // of the stop ID that m_actual_stop_info_sp is valid for (even if it
+        // contains nothing). We use m_thread_stop_reason_stop_id for this below.
+//        m_thread_stop_reason_stop_id = process_stop_id;
+//        m_actual_stop_info_sp.reset();
+
+    }
+    return m_actual_stop_info_sp;
+}
+
+