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This patch adds a definition of max_align_t to the internal
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<sys/cdefs.h> header, for use in support/ functionality and elsewhere.
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The definition must support being compiled in C11 or C++11 mode and
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must check both __STDC_VERSION__ and __cplusplus versions.
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Upstream does not need this because all files are compiled in C11
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mode, making available the GCC definition in <stddef.h>
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Also change malloc/tst-malloc-thread-fail.c to use the new definition.
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Index: glibc-2.17-c758a686/include/sys/cdefs.h
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===================================================================
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--- glibc-2.17-c758a686.orig/include/sys/cdefs.h
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+++ glibc-2.17-c758a686/include/sys/cdefs.h
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@@ -15,6 +15,18 @@ rtld_hidden_proto (__chk_fail)
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# define __attribute_alloc_size(...) __attribute__ ((alloc_size (__VA_ARGS__)))
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+
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+/* This mirrors the C11/C++11 max_align_t type provided by GCC, but it
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+ is also available in C99 mode. The aligned attributes are required
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+ because some ABIs have reduced alignment requirements for struct and
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+ union members. */
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+#if __STDC_VERSION__ < 201112L && __cplusplus < 201103L
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+typedef struct {
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+ long long ll __attribute__ ((__aligned__ (__alignof__ (long long))));
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+ long double ld __attribute__ ((__aligned__ (__alignof__ (long double))));
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+} max_align_t;
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+#endif /* __STDC_VERSION__ < 201112 && __cplusplus < 201103L */
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+
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#endif
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#endif
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Index: glibc-2.17-c758a686/malloc/tst-malloc-thread-fail.c
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===================================================================
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--- glibc-2.17-c758a686.orig/malloc/tst-malloc-thread-fail.c
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+++ glibc-2.17-c758a686/malloc/tst-malloc-thread-fail.c
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@@ -30,16 +30,6 @@
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#include <sys/resource.h>
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#include <sys/wait.h>
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#include <unistd.h>
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-#include <stddef.h>
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-
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-/* This mirrors the C11 max_align_t type provided by GCC, but it is
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- also available in C99 mode. The aligned attributes are required
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- because some ABIs have reduced alignment requirements for struct
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- and union members. */
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-typedef struct {
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- long long ll __attribute__ ((__aligned__ (__alignof__ (long long))));
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- long double ld __attribute__ ((__aligned__ (__alignof__ (long double))));
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-} libc_max_align_t;
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/* Wrapper for calloc with an optimization barrier. */
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static void *
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@@ -93,7 +83,7 @@ allocate_1 (void)
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{
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case with_malloc:
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return (struct allocate_result)
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- {malloc (allocation_size), __alignof__ (libc_max_align_t)};
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+ {malloc (allocation_size), _Alignof (max_align_t)};
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case with_realloc:
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{
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void *p = realloc (NULL, 16);
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@@ -106,7 +96,7 @@ allocate_1 (void)
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if (q == NULL)
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free (p);
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}
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- return (struct allocate_result) {q, __alignof__ (libc_max_align_t)};
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+ return (struct allocate_result) {q, _Alignof (max_align_t)};
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}
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case with_aligned_alloc:
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{
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@@ -155,7 +145,7 @@ allocate_1 (void)
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printf ("error: non-zero byte at offset %zu\n", i);
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abort ();
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}
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- return (struct allocate_result) {p, __alignof__ (libc_max_align_t)};
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+ return (struct allocate_result) {p, _Alignof (max_align_t)};
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}
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}
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abort ();
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