#ifndef _ALLOCA_H
#include <stdlib/alloca.h>
+#include <stackinfo.h>
#undef __alloca
# define __alloca(size) __builtin_alloca (size)
#endif /* GCC. */
+extern int __libc_use_alloca (size_t size) __attribute__ ((const));
+extern int __libc_alloca_cutoff (size_t size) __attribute__ ((const));
+libc_hidden_proto (__libc_alloca_cutoff)
+
+#define __MAX_ALLOCA_CUTOFF 65536
+
+#include <allocalim.h>
+
+#ifndef stackinfo_alloca_round
+# define stackinfo_alloca_round(l) (((l) + 15) & -16)
+#endif
+
+#if _STACK_GROWS_DOWN
+# define extend_alloca(buf, len, newlen) \
+ (__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \
+ char *__newbuf = __alloca (__newlen); \
+ if (__newbuf + __newlen == (char *) buf) \
+ len += __newlen; \
+ else \
+ len = __newlen; \
+ __newbuf; })
+#elif _STACK_GROWS_UP
+# define extend_alloca(buf, len, newlen) \
+ (__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \
+ char *__newbuf = __alloca (__newlen); \
+ char *__buf = (buf); \
+ if (__buf + len == __newbuf) \
+ { \
+ len += __newlen; \
+ __newbuf = __buf; \
+ } \
+ else \
+ len = __newlen; \
+ __newbuf; })
+#else
+# define extend_alloca(buf, len, newlen) \
+ __alloca (((len) = (newlen)))
+#endif
+
+#if defined stackinfo_get_sp && defined stackinfo_sub_sp
+# define alloca_account(size, avar) \
+ ({ void *old__ = stackinfo_get_sp (); \
+ void *m__ = __alloca (size); \
+ avar += stackinfo_sub_sp (old__); \
+ m__; })
+# define extend_alloca_account(buf, len, newlen, avar) \
+ ({ void *old__ = stackinfo_get_sp (); \
+ void *m__ = extend_alloca (buf, len, newlen); \
+ avar += stackinfo_sub_sp (old__); \
+ m__; })
+#else
+# define alloca_account(size, avar) \
+ ({ size_t s__ = (size); \
+ avar += s__; \
+ __alloca (s__); })
+# define extend_alloca_account(buf, len, newlen, avar) \
+ ({ size_t s__ = (newlen); \
+ avar += s__; \
+ extend_alloca (buf, len, s__); })
+#endif
+
#endif