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| author | Roland McGrath <roland@hack.frob.com> | 2012-05-21 11:13:10 -0700 |
|---|---|---|
| committer | Roland McGrath <roland@hack.frob.com> | 2012-05-21 11:13:10 -0700 |
| commit | cbc00a03986c5890f0a9d2c7cdac26b7606fe98c (patch) | |
| tree | 864ed2965fbee17dabb6483a0359921fed969cf0 /malloc | |
| parent | 478143fa1706a0212366dfa4d9bcf3d8334ca131 (diff) | |
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Set MALLOC_ALIGNMENT to at least __alignof__ (long double) for new ABIs.
Diffstat (limited to 'malloc')
| -rw-r--r-- | malloc/malloc.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c index abe38723be..c216d26e65 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -337,16 +337,20 @@ __malloc_assert (const char *assertion, const char *file, unsigned int line, #ifndef MALLOC_ALIGNMENT -/* XXX This is the correct definition. It differs from 2*SIZE_SZ only on - powerpc32. For the time being, changing this is causing more - compatibility problems due to malloc_get_state/malloc_set_state than - will returning blocks not adequately aligned for long double objects - under -mlong-double-128. - -#define MALLOC_ALIGNMENT (2 * SIZE_SZ < __alignof__ (long double) \ - ? __alignof__ (long double) : 2 * SIZE_SZ) -*/ -#define MALLOC_ALIGNMENT (2 * SIZE_SZ) +# if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_16) +/* This is the correct definition when there is no past ABI to constrain it. + + Among configurations with a past ABI constraint, it differs from + 2*SIZE_SZ only on powerpc32. For the time being, changing this is + causing more compatibility problems due to malloc_get_state and + malloc_set_state than will returning blocks not adequately aligned for + long double objects under -mlong-double-128. */ + +# define MALLOC_ALIGNMENT (2 * SIZE_SZ < __alignof__ (long double) \ + ? __alignof__ (long double) : 2 * SIZE_SZ) +# else +# define MALLOC_ALIGNMENT (2 * SIZE_SZ) +# endif #endif /* The corresponding bit mask value */ |