[cfe-commits] [libcxxabi] r147547 - in /libcxxabi/trunk/src: cxa_exception.cpp cxa_personality.cpp

[Howard Hinnant]

Author: hhinnant
Date: Wed Jan  4 14:49:43 2012
New Revision: 147547

URL: http://llvm.org/viewvc/llvm-project?rev=147547&view=rev
Log:
Just getting started on the personality routine.  This is just a skeleton.  Still learning how to fill it in...

Added:
    libcxxabi/trunk/src/cxa_personality.cpp
Modified:
    libcxxabi/trunk/src/cxa_exception.cpp

Modified: libcxxabi/trunk/src/cxa_exception.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxxabi/trunk/src/cxa_exception.cpp?rev=147547&r1=147546&r2=147547&view=diff
==============================================================================
--- libcxxabi/trunk/src/cxa_exception.cpp (original)
+++ libcxxabi/trunk/src/cxa_exception.cpp Wed Jan  4 14:49:43 2012
@@ -451,12 +451,6 @@
     // If we return client will call terminate()
 }
 
-_Unwind_Reason_Code
-__gxx_personality_v0(int version, _Unwind_Action actions, uint64_t exceptionClass,
-                     _Unwind_Exception* exceptionObject, _Unwind_Context* context)
-{
-}
-
 }  // extern "C"
 
 }  // abi

Added: libcxxabi/trunk/src/cxa_personality.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxxabi/trunk/src/cxa_personality.cpp?rev=147547&view=auto
==============================================================================
--- libcxxabi/trunk/src/cxa_personality.cpp (added)
+++ libcxxabi/trunk/src/cxa_personality.cpp Wed Jan  4 14:49:43 2012
@@ -0,0 +1,107 @@
+//===------------------------- cxa_exception.cpp --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//  
+//  This file implements the "Exception Handling APIs"
+//  http://www.codesourcery.com/public/cxx-abi/abi-eh.html
+//  
+//===----------------------------------------------------------------------===//
+
+#include "unwind.h"
+
+namespace __cxxabiv1
+{
+
+extern "C"
+{
+
+// private API
+
+// Return true if there is a handler and false otherwise
+// cache handlerSwitchValue, actionRecord, languageSpecificData,
+//    catchTemp and adjustedPtr here.
+static
+bool
+contains_handler(_Unwind_Exception* exceptionObject, _Unwind_Context* context)
+{
+}
+
+// return _URC_INSTALL_CONTEXT or _URC_FATAL_PHASE2_ERROR
+static
+_Unwind_Reason_Code
+transfer_control_to_landing_pad(_Unwind_Context* context)
+{
+}
+
+// return _URC_CONTINUE_UNWIND or _URC_FATAL_PHASE2_ERROR
+static
+_Unwind_Reason_Code
+perform_cleanup(_Unwind_Context* context)
+{
+}
+
+// public API
+
+// Requires:  version == 1
+//            actions == _UA_SEARCH_PHASE, or
+//                    == _UA_CLEANUP_PHASE, or
+//                    == _UA_CLEANUP_PHASE | _UA_HANDLER_FRAME, or
+//                    == _UA_CLEANUP_PHASE | _UA_FORCE_UNWIND
+//            exceptionObject != nullptr
+//            context != nullptr
+_Unwind_Reason_Code
+__gxx_personality_v0(int version, _Unwind_Action actions, uint64_t exceptionClass,
+                     _Unwind_Exception* exceptionObject, _Unwind_Context* context)
+{
+    if (version == 1 && exceptionObject != 0 && context != 0)
+    {
+        bool native_exception = (exceptionClass & 0xFFF0) == 0x432B2B00;
+        bool force_unwind = actions & _UA_FORCE_UNWIND;
+        if (native_exception && !force_unwind)
+        {
+            if (actions & _UA_SEARCH_PHASE)
+            {
+                if (actions & _UA_CLEANUP_PHASE)
+                    return _URC_FATAL_PHASE1_ERROR;
+                if (contains_handler(exceptionObject, context))
+                    return _URC_HANDLER_FOUND
+                return _URC_CONTINUE_UNWIND;
+            }
+            if (actions & _UA_CLEANUP_PHASE)
+            {
+                if (actions & _UA_HANDLER_FRAME)
+                {
+                    // return _URC_INSTALL_CONTEXT or _URC_FATAL_PHASE2_ERROR
+                    return transfer_control_to_landing_pad(context);
+                }
+                // return _URC_CONTINUE_UNWIND or _URC_FATAL_PHASE2_ERROR
+                return perform_cleanup();
+            }
+        }
+        else // foreign exception or force_unwind
+        {
+            if (actions & _UA_SEARCH_PHASE)
+            {
+                if (actions & _UA_CLEANUP_PHASE)
+                    return _URC_FATAL_PHASE1_ERROR;
+                return _URC_CONTINUE_UNWIND;
+            }
+            if (actions & _UA_CLEANUP_PHASE)
+            {
+                if (actions & _UA_HANDLER_FRAME)
+                    return _URC_FATAL_PHASE2_ERROR;
+                // return _URC_CONTINUE_UNWIND or _URC_FATAL_PHASE2_ERROR
+                return perform_cleanup();
+            }
+        }
+    }
+    return _URC_FATAL_PHASE1_ERROR;
+}
+
+}  // extern "C"
+
+}  // __cxxabiv1