* [PATCH] PR libstdc++/92143 adjust for OS X aligned_alloc behaviour
@ 2019-10-18 11:27 Jonathan Wakely
0 siblings, 0 replies; only message in thread
From: Jonathan Wakely @ 2019-10-18 11:27 UTC (permalink / raw)
To: libstdc++, gcc-patches
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OS X 10.15 adds aligned_alloc but it has the same restriction as the AIX
version, namely that alignments smaller than sizeof(void*) are not
supported.
PR libstdc++/92143
* libsupc++/new_opa.cc (operator new) [__APPLE__]: Increase alignment
to at least sizeof(void*).
Tested powerpc64le-linux, committed to trunk.
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commit 356a59f69de9896d5b517cb28790da4335fd758f
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Fri Oct 18 11:45:20 2019 +0100
PR libstdc++/92143 adjust for OS X aligned_alloc behaviour
OS X 10.15 adds aligned_alloc but it has the same restriction as the AIX
version, namely that alignments smaller than sizeof(void*) are not
supported.
PR libstdc++/92143
* libsupc++/new_opa.cc (operator new) [__APPLE__]: Increase alignment
to at least sizeof(void*).
diff --git a/libstdc++-v3/libsupc++/new_opa.cc b/libstdc++-v3/libsupc++/new_opa.cc
index aa5d2e14455..80eb343a1c8 100644
--- a/libstdc++-v3/libsupc++/new_opa.cc
+++ b/libstdc++-v3/libsupc++/new_opa.cc
@@ -108,9 +108,10 @@ operator new (std::size_t sz, std::align_val_t al)
sz = 1;
#if _GLIBCXX_HAVE_ALIGNED_ALLOC
-# ifdef _AIX
+# if defined _AIX || defined __APPLE__
/* AIX 7.2.0.0 aligned_alloc incorrectly has posix_memalign's requirement
- * that alignment is a multiple of sizeof(void*). */
+ * that alignment is a multiple of sizeof(void*).
+ * OS X 10.15 has the same requirement. */
if (align < sizeof(void*))
align = sizeof(void*);
# endif
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2019-10-18 11:27 [PATCH] PR libstdc++/92143 adjust for OS X aligned_alloc behaviour Jonathan Wakely
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