Modified the LocateMacOSXFilesUsingDebugSymbols(...) function to locate

an executable file if it is right next to a dSYM file that is found using
DebugSymbols. The code also looks into a bundle if the dSYM file is right
next to a bundle.

Modified the MacOSX kernel dynamic loader plug-in to correctly set the load
address for kext sections. This is a tad tricky because of how LLDB chooses
to treat mach-o segments with no name. Also modified the loader to properly
handle the older version 1 kext summary info.

Fixed a crasher in the Mach-o object file parser when it is trying to set
the section size correctly for dSYM sections.

Added packet dumpers to the CommunicationKDP class. We now also properly 
detect address byte sizes based on the cpu type and subtype that is provided.
Added a read memory and read register support to CommunicationKDP. Added a
ThreadKDP class that now uses subclasses of the RegisterContextDarwin_XXX for
arm, i386 and x86_64. 

Fixed some register numbering issues in the RegisterContextDarwin_arm class
and added ARM GDB numbers to the ARM_GCC_Registers.h file.

Change the RegisterContextMach_XXX classes over to subclassing their
RegisterContextDarwin_XXX counterparts so we can share the mach register 
contexts between the user and kernel plug-ins.

llvm-svn: 135466

1 files changed, 115 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h b/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h
new file mode 100644
index 00000000000..95c2f0577e4
--- /dev/null
+++ b/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.h
@@ -0,0 +1,115 @@
+//===-- ThreadKDP.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_ThreadKDP_h_
+#define liblldb_ThreadKDP_h_
+
+#include <string>
+
+#include "lldb/Target/Process.h"
+#include "lldb/Target/Thread.h"
+
+class ProcessKDP;
+
+class ThreadKDP : public lldb_private::Thread
+{
+public:
+    ThreadKDP (ProcessKDP &process, 
+               lldb::tid_t tid);
+
+    virtual
+    ~ThreadKDP ();
+
+    virtual bool
+    WillResume (lldb::StateType resume_state);
+
+    virtual void
+    RefreshStateAfterStop();
+
+    virtual const char *
+    GetInfo ();
+
+    virtual const char *
+    GetName ();
+
+    virtual const char *
+    GetQueueName ();
+
+    virtual lldb::RegisterContextSP
+    GetRegisterContext ();
+
+    virtual lldb::RegisterContextSP
+    CreateRegisterContextForFrame (lldb_private::StackFrame *frame);
+
+    virtual void
+    ClearStackFrames ();
+
+    ProcessKDP &
+    GetKDPProcess ()
+    {
+        return (ProcessKDP &)m_process;
+    }
+
+    void
+    Dump (lldb_private::Log *log, uint32_t index);
+
+    static bool
+    ThreadIDIsValid (lldb::tid_t thread);
+
+    bool
+    ShouldStop (bool &step_more);
+
+    const char *
+    GetBasicInfoAsString ();
+
+    void
+    SetName (const char *name)
+    {
+        if (name && name[0])
+            m_thread_name.assign (name);
+        else
+            m_thread_name.clear();
+    }
+
+    lldb::addr_t
+    GetThreadDispatchQAddr ()
+    {
+        return m_thread_dispatch_qaddr;
+    }
+
+    void
+    SetThreadDispatchQAddr (lldb::addr_t thread_dispatch_qaddr)
+    {
+        m_thread_dispatch_qaddr = thread_dispatch_qaddr;
+    }
+
+protected:
+    
+    friend class ProcessKDP;
+
+    //------------------------------------------------------------------
+    // Member variables.
+    //------------------------------------------------------------------
+    std::string m_thread_name;
+    std::string m_dispatch_queue_name;
+    lldb::addr_t m_thread_dispatch_qaddr;
+    //------------------------------------------------------------------
+    // Member variables.
+    //------------------------------------------------------------------
+
+    virtual lldb_private::Unwind *
+    GetUnwinder ();
+
+    virtual lldb::StopInfoSP
+    GetPrivateStopReason ();
+
+
+};
+
+#endif  // liblldb_ThreadKDP_h_