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From 426e2d0bdb283e25386a302d81202a6ddbfdbec0 Mon Sep 17 00:00:00 2001
From: Rob Browning <rlb@defaultvalue.org>
Date: Thu, 28 Nov 2024 13:01:01 -0600
Subject: Eight byte align statically allocated stringbufs
Previously they were unaligned, unlike their parent strings, and so
could end up with the wrong pointer tag. Observed on i686-linux-gnu,
where they ended up tagged as immediates (SCM_IMP()), causing failures
in TYP7 related checks.
* libguile/strings.h (SCM_IMMUTABLE_STRINGBUF): align resulting buffer
via SCM_ALIGNED(8).
Origin: upstream, commit 76afb429ee7a8a4c9eddb20bf29a2246192f8a28
---
libguile/strings.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libguile/strings.h b/libguile/strings.h
index f28ef3246..d417514f8 100644
--- a/libguile/strings.h
+++ b/libguile/strings.h
@@ -184,7 +184,7 @@ SCM_API SCM scm_makfromstrs (int argc, char **argv);
#ifdef SCM_SUPPORT_STATIC_ALLOCATION
#define SCM_IMMUTABLE_STRINGBUF(c_name, contents) \
- static SCM_UNUSED const \
+ static SCM_UNUSED SCM_ALIGNED(8) const \
struct \
{ \
scm_t_bits word_0; \
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