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Add partial support for building with MingW64 GCC 4.8-SEH.

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Error handling works, C++ interoperability generally works.
C++ destructors in libs compiled with G++ cause trouble (ok with MSVC).
This commit is contained in:
Mike Pall
2013-05-15 18:48:06 +02:00
parent 23aa02fb51
commit 1a5fd521b8
4 changed files with 16 additions and 11 deletions
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16
src/lj_err.c
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@@ -385,12 +385,17 @@ typedef struct UndocumentedDispatcherContext {
ULONG Fill0;
} UndocumentedDispatcherContext;
#ifdef _MSC_VER
/* Another wild guess. */
extern __DestructExceptionObject(EXCEPTION_RECORD *rec, int nothrow);
extern void __DestructExceptionObject(EXCEPTION_RECORD *rec, int nothrow);
#ifdef MINGW_SDK_INIT
/* Workaround for broken MinGW64 declaration. */
VOID RtlUnwindEx_FIXED(PVOID,PVOID,PVOID,PVOID,PVOID,PVOID) asm("RtlUnwindEx");
#define RtlUnwindEx RtlUnwindEx_FIXED
#endif
#define LJ_MSVC_EXCODE ((DWORD)0xe06d7363)
#define LJ_GCC_EXCODE ((DWORD)0x20474343)
#define LJ_EXCODE ((DWORD)0xe24c4a00)
#define LJ_EXCODE_MAKE(c) (LJ_EXCODE | (DWORD)(c))
@@ -410,10 +415,9 @@ LJ_FUNCA EXCEPTION_DISPOSITION lj_err_unwind_win64(EXCEPTION_RECORD *rec,
} else {
void *cf2 = err_unwind(L, cf, 0);
if (cf2) { /* We catch it, so start unwinding the upper frames. */
if (rec->ExceptionCode == LJ_MSVC_EXCODE) {
#ifdef _MSC_VER
if (rec->ExceptionCode == LJ_MSVC_EXCODE ||
rec->ExceptionCode == LJ_GCC_EXCODE) {
__DestructExceptionObject(rec, 1);
#endif
setstrV(L, L->top++, lj_err_str(L, LJ_ERR_ERRCPP));
} else if (!LJ_EXCODE_CHECK(rec->ExceptionCode)) {
/* Don't catch access violations etc. */
@@ -426,7 +430,7 @@ LJ_FUNCA EXCEPTION_DISPOSITION lj_err_unwind_win64(EXCEPTION_RECORD *rec,
RtlUnwindEx(cf, (void *)((cframe_unwind_ff(cf2) && errcode != LUA_YIELD) ?
lj_vm_unwind_ff_eh :
lj_vm_unwind_c_eh),
rec, (void *)errcode, ctx, dispatch->HistoryTable);
rec, (void *)(uintptr_t)errcode, ctx, dispatch->HistoryTable);
/* RtlUnwindEx should never return. */
}
}