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author | Inada Naoki <songofacandy@gmail.com> | 2019-05-25 21:13:33 +0900 |
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committer | GitHub <noreply@github.com> | 2019-05-25 21:13:33 +0900 |
commit | ea2b76bdc5f97f49701213d105b8ec2387ea2fa5 (patch) | |
tree | 4d4e79d68e72b9740590b09e32024c1592ec736f /Include | |
parent | c70ab1cca0f43dbf3bad4acacd06a792cdbe03c8 (diff) | |
download | cpython-git-ea2b76bdc5f97f49701213d105b8ec2387ea2fa5.tar.gz |
bpo-27987: align PyGC_Head to alignof(long double) (GH-13335)
Diffstat (limited to 'Include')
-rw-r--r-- | Include/objimpl.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Include/objimpl.h b/Include/objimpl.h index 057bb50cbd..0436ba7899 100644 --- a/Include/objimpl.h +++ b/Include/objimpl.h @@ -255,7 +255,11 @@ typedef union _gc_head { union _gc_head *gc_prev; Py_ssize_t gc_refs; } gc; - double dummy; /* force worst-case alignment */ + long double dummy; /* force worst-case alignment */ + // malloc returns memory block aligned for any built-in types and + // long double is the largest standard C type. + // On amd64 linux, long double requires 16 byte alignment. + // See bpo-27987 for more discussion. } PyGC_Head; extern PyGC_Head *_PyGC_generation0; |