Correct range checking in mallopt/mxfast/tcache [BZ #25194]

[thirdparty/glibc.git] / include / alloca.h

diff --git a/include/alloca.h b/include/alloca.h
index 3a480f8e24a8c1d589cc00a85699584d3b9839c8..c0b83954436ed4c1e7c3246e914bc36ac1606dd9 100644 (file)
--- a/include/alloca.h
+++ b/include/alloca.h
@@ -2,6 +2,10 @@
 
 #include <stdlib/alloca.h>
 
+# ifndef _ISOMAC
+
+#include <stackinfo.h>
+
 #undef __alloca
 
 /* Now define the internal interfaces.  */
@@ -11,4 +15,26 @@ extern void *__alloca (size_t __size);
 # 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>
+
+#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__; })
+#else
+# define alloca_account(size, avar) \
+  ({ size_t s__ = (size);                                                    \
+     avar += s__;                                                            \
+     __alloca (s__); })
+#endif
+
+# endif /* !_ISOMAC */
 #endif