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* [libffi] fix crash in debug (cherry picked from commit 78b3f05731556e23ad8f1ef8b168ad99cc1c4a9c) * Update CONTROL * [libffi] fix crash in debug (x86-windows) Co-authored-by: Lily <47812810+LilyWangL@users.noreply.github.com> Co-authored-by: Rolf Gebhardt <rolf.gebhardt@lbs-sw.de>
51 lines
1.7 KiB
Diff
51 lines
1.7 KiB
Diff
Rolf Gebhardt <rolf.gebhardt@lbs-sw.de>
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22 Jul 2020
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[PATCH] x86/win32: disable runtime stack frame checks with msvc
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around built assembly
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based on the patch for x86/win64:
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From 53291b332b1bc061a3409d3b60c38f313609b98e Mon Sep 17 00:00:00 2001
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From: Matthew Waters <matthew@centricular.com>
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Date: Fri, 16 Mar 2018 15:10:04 +1100
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Subject: [PATCH] x86/win64: disable runtime stack frame checks with msvc
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around built assembly
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MSVC can add truntime code that checks if a stack frame is mismanaged
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however our custom assembly delibrately accesses and modifies the parent
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stack frame. Fortunately we can disable that specific check for the
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function call so do that.
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---
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src/x86/ffi.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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diff --git a/src/x86/ffi.c b/src/x86/ffi.c
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index 9a59218..9f5d703 100644
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--- a/src/x86/ffi.c
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+++ b/src/x86/ffi.c
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@@ -255,6 +255,14 @@ static const struct abi_params abi_params[FFI_LAST_ABI] = {
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extern void FFI_DECLARE_FASTCALL ffi_call_i386(struct call_frame *, char *) FFI_HIDDEN;
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+/* we perform some black magic here to use some of the parent's
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+ * stack frame in ff_call_win() that breaks with the msvc compiler
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+ * with the /RTCs or /GZ flags. Disable the 'Stack frame run time
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+ * error checking' for this function so we don't hit weird exceptions
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+ * in debug builds */
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+#if defined(_MSC_VER)
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+#pragma runtime_checks("s", off)
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+#endif
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static void
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ffi_call_int (ffi_cif *cif, void (*fn)(void), void *rvalue,
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void **avalue, void *closure)
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@@ -390,6 +398,9 @@ ffi_call_int (ffi_cif *cif, void (*fn)(void), void *rvalue,
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ffi_call_i386 (frame, stack);
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}
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+#if defined(_MSC_VER)
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+#pragma runtime_checks("s", restore)
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+#endif
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void
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ffi_call (ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
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