[PATCH] D102530: [compiler-rt] [builtins] Provide a SEH specific __gcc_personality_seh0

[Martin Storsjö via Phabricator via llvm-commits]

mstorsjo created this revision.
mstorsjo added reviewers: rnk, MaskRay.
Herald added a subscriber: dberris.
mstorsjo requested review of this revision.
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Herald added a subscriber: Sanitizers.

This matches how __gxx_personality_seh0 is hooked up in libcxxabi.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D102530

Files:
  compiler-rt/lib/builtins/gcc_personality_v0.c


Index: compiler-rt/lib/builtins/gcc_personality_v0.c
===================================================================
--- compiler-rt/lib/builtins/gcc_personality_v0.c
+++ compiler-rt/lib/builtins/gcc_personality_v0.c
@@ -21,6 +21,16 @@
 #include "unwind-ehabi-helpers.h"
 #endif
 
+#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)
+#include <windows.h>
+#include <winnt.h>
+
+EXCEPTION_DISPOSITION _GCC_specific_handler(PEXCEPTION_RECORD,
+                                            void *, PCONTEXT,
+                                            PDISPATCHER_CONTEXT,
+                                            _Unwind_Personality_Fn);
+#endif
+
 // Pointer encodings documented at:
 //   http://refspecs.freestandards.org/LSB_1.3.0/gLSB/gLSB/ehframehdr.html
 
@@ -169,6 +179,10 @@
 COMPILER_RT_ABI _Unwind_Reason_Code __gcc_personality_v0(
     _Unwind_State state, struct _Unwind_Exception *exceptionObject,
     struct _Unwind_Context *context)
+#elif defined(__SEH__)
+static _Unwind_Reason_Code __gcc_personality_imp(
+    int version, _Unwind_Action actions, uint64_t exceptionClass,
+    struct _Unwind_Exception *exceptionObject, struct _Unwind_Context *context)
 #else
 COMPILER_RT_ABI _Unwind_Reason_Code __gcc_personality_v0(
     int version, _Unwind_Action actions, uint64_t exceptionClass,
@@ -233,3 +247,13 @@
   // No landing pad found, continue unwinding.
   return continueUnwind(exceptionObject, context);
 }
+
+#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)
+COMPILER_RT_ABI EXCEPTION_DISPOSITION
+__gcc_personality_seh0(PEXCEPTION_RECORD ms_exc, void *this_frame,
+                       PCONTEXT ms_orig_context, PDISPATCHER_CONTEXT ms_disp)
+{
+  return _GCC_specific_handler(ms_exc, this_frame, ms_orig_context, ms_disp,
+                               __gcc_personality_imp);
+}
+#endif


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