From 853d91a04a4d133fc90b35c90570dc1c656a7922 Mon Sep 17 00:00:00 2001 From: Lars Kanis Date: Mon, 4 Nov 2019 11:00:13 +0100 Subject: [PATCH] Fix coroutine support on win32 Ruby master branch currently fails on win32 MINGW at this spec: https://github.com/ruby/spec/blob/master/core/thread/element_set_spec.rb MINGW makes use of setjmp3() implemented in MSVCRT.DLL. This function traverses the SEH list up to a terminating pointer 0xFFFFFFFF. It therefore currently segfaults on NULL. The SEH linked list must be terminated by 0xFFFFFFFF instead of NULL. This fixes the issue mentioned here: https://github.com/ruby/ruby/pull/2279#issuecomment-509508810 --- coroutine/win32/Context.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/coroutine/win32/Context.h b/coroutine/win32/Context.h index c70b65cd2f..299515ed92 100644 --- a/coroutine/win32/Context.h +++ b/coroutine/win32/Context.h @@ -42,7 +42,7 @@ static inline void coroutine_initialize( *--context->stack_pointer = (void*)start; /* Windows Thread Information Block */ - *--context->stack_pointer = 0; /* fs:[0] */ + *--context->stack_pointer = (void*)0xFFFFFFFF; /* fs:[0] */ *--context->stack_pointer = (void*)top; /* fs:[4] */ *--context->stack_pointer = (void*)stack; /* fs:[8] */