Add lldb-gdbserver support for Linux x86_64.

This change brings in lldb-gdbserver (llgs) specifically for Linux x86_64.
(More architectures coming soon).

Not every debugserver option is covered yet.  Currently
the lldb-gdbserver command line can start unattached,
start attached to a pid (process-name attach not supported yet),
or accept lldb attaching and launching a process or connecting
by process id.

The history of this large change can be found here:
https://github.com/tfiala/lldb/tree/dev-tfiala-native-protocol-linux-x86_64

Until mid/late April, I was not sharing the work and continued
to rebase it off of head (developed via id tfiala@google.com).  I switched over to
user todd.fiala@gmail.com in the middle, and once I went to github, I did
merges rather than rebasing so I could share with others.

llvm-svn: 212069

1 files changed, 97 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h
new file mode 100644
index 00000000000..1a9fc4e868c
--- /dev/null
+++ b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h
@@ -0,0 +1,97 @@
+//===-- NativeThreadLinux.h ----------------------------------- -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_NativeThreadLinux_H_
+#define liblldb_NativeThreadLinux_H_
+
+#include "lldb/lldb-private-forward.h"
+#include "../../../Host/common/NativeThreadProtocol.h"
+
+namespace lldb_private
+{
+    class NativeProcessLinux;
+
+    class NativeThreadLinux : public NativeThreadProtocol
+    {
+        friend class NativeProcessLinux;
+
+    public:
+        NativeThreadLinux (NativeProcessLinux *process, lldb::tid_t tid);
+
+        // ---------------------------------------------------------------------
+        // NativeThreadProtocol Interface
+        // ---------------------------------------------------------------------
+        const char *
+        GetName() override;
+
+        lldb::StateType
+        GetState () override;
+
+        bool
+        GetStopReason (ThreadStopInfo &stop_info) override;
+
+        NativeRegisterContextSP
+        GetRegisterContext () override;
+
+        Error
+        SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware) override;
+
+        Error
+        RemoveWatchpoint (lldb::addr_t addr) override;
+
+        uint32_t
+        TranslateStopInfoToGdbSignal (const ThreadStopInfo &stop_info) const override;
+
+    private:
+        // ---------------------------------------------------------------------
+        // Interface for friend classes
+        // ---------------------------------------------------------------------
+        void
+        SetLaunching ();
+
+        void
+        SetRunning ();
+
+        void
+        SetStepping ();
+
+        void
+        SetStoppedBySignal (uint32_t signo);
+
+        void
+        SetStoppedByBreakpoint ();
+
+        bool
+        IsStoppedAtBreakpoint ();
+
+        void
+        SetCrashedWithException (uint64_t exception_type, lldb::addr_t exception_addr);
+
+        void
+        SetSuspended ();
+
+        void
+        SetExited ();
+
+        // ---------------------------------------------------------------------
+        // Private interface
+        // ---------------------------------------------------------------------
+        void
+        MaybeLogStateChange (lldb::StateType new_state);
+
+        // ---------------------------------------------------------------------
+        // Member Variables
+        // ---------------------------------------------------------------------
+        lldb::StateType m_state;
+        ThreadStopInfo m_stop_info;
+        NativeRegisterContextSP m_reg_context_sp;
+    };
+}
+
+#endif // #ifndef liblldb_NativeThreadLinux_H_