[PATCH 0/3] MR8067: Fixes for compiler __try/__except support

[Jacek Caban (＠jacek)]

This change allows building with compiler exception support enabled (`-DUSE_COMPILER_EXCEPTIONS`) on non-i386 targets.

On i386, `_except_handler3` needs to be available. While we provide it as an import from the msvcrt DLLs, that's not sufficient for modules like
kernel32. Making this work would likely require moving `_except_handler3` to `winecrt0`.

In practice, this fixes the build with Clang, although the resulting binaries do not appear to be fully correct yet. Further investigation is needed, likely on the LLVM side.

[PATCH 1/3] msvcrt: Add empty block for __EXCEPT_PAGE_FAULT.

[Jacek Caban]

From: Jacek Caban

This fixes invalid syntax when compiler exceptions are enabled.
---
 dlls/msvcrt/cpp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/msvcrt/cpp.c b/dlls/msvcrt/cpp.c
index 84959f1a05c..b8242c06e17 100644
--- a/dlls/msvcrt/cpp.c
+++ b/dlls/msvcrt/cpp.c
@@ -937,6 +937,8 @@ int __cdecl _is_exception_typeof(const type_info *ti, EXCEPTION_POINTERS *ep)
         }
     }
     __EXCEPT_PAGE_FAULT
+    {
+    }
     __ENDTRY

if(ret == -1)

[PATCH 2/3] include: Use ULONG for RpcExceptionCode macro.

[Jacek Caban]

From: Jacek Caban

Fixes format warnings when compiler exception support is enabled.
---
 dlls/rpcrt4/tests/server.c | 2 +-
 include/rpc.h              | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/rpcrt4/tests/server.c b/dlls/rpcrt4/tests/server.c
index baf00aee744..07926ee9a36 100644
--- a/dlls/rpcrt4/tests/server.c
+++ b/dlls/rpcrt4/tests/server.c
@@ -2834,7 +2834,7 @@ START_TEST(server)
     }
     RpcExcept(TRUE)
     {
-      trace("Exception %d\n", RpcExceptionCode());
+      trace("Exception %ld\n", RpcExceptionCode());
     }
     RpcEndExcept
   }
diff --git a/include/rpc.h b/include/rpc.h
index 2d4323428c4..88bd51e94bf 100644
--- a/include/rpc.h
+++ b/include/rpc.h
@@ -79,7 +79,7 @@ typedef void* I_RPC_HANDLE;
 #define RpcTryFinally
 #define RpcFinally
 #define RpcEndFinally
-#define RpcExceptionCode() 0
+#define RpcExceptionCode() ((ULONG)0)
 /* #define RpcAbnormalTermination() abort() */

#endif /* USE_COMPILER_EXCEPTIONS */

[PATCH 3/3] winecrt0: Skip Wine exception helpers when compiler exception support is enabled.

[Jacek Caban]

From: Jacek Caban

---
 dlls/winecrt0/exception.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/winecrt0/exception.c b/dlls/winecrt0/exception.c
index 58cf91172ac..80c13eb9a68 100644
--- a/dlls/winecrt0/exception.c
+++ b/dlls/winecrt0/exception.c
@@ -23,7 +23,7 @@
 #include "wine/exception.h"
 #include "wine/asm.h"

-#if defined(__GNUC__) || defined(__clang__)
+#if (defined(__GNUC__) || defined(__clang__)) && !defined(USE_COMPILER_EXCEPTIONS)

#if defined(__i386__)

@@ -190,4 +190,4 @@ DWORD __cdecl __wine_finally_ctx_handler( EXCEPTION_RECORD *record,
     return ExceptionContinueSearch;
 }

-#endif /* __GNUC__ || __clang__ */
+#endif /* (__GNUC__ || __clang__) && !USE_COMPILER_EXCEPTIONS */

[Alexandre Julliard (＠julliard)]

Alexandre Julliard (@julliard) commented about dlls/winecrt0/exception.c:
> #include "wine/exception.h"
>  #include "wine/asm.h"
>
> -#if defined(__GNUC__) || defined(__clang__)
> +#if (defined(__GNUC__) || defined(__clang__)) && !defined(USE_COMPILER_EXCEPTIONS)

This would break Winelib if an app is built without -DUSE_COMPILER_EXCEPTIONS.