Use alloc_size attribute on *alloc functions
malloc and family were not declared with __attribute__((alloc_size)).
This was (sometimes) preventing FORTIFY_SOURCE related functions
from knowing the size of the buffer it's dealing with, inhibiting
FORTIFY_SOURCE protections.
Add __attribute__((alloc_size))
Information about the alloc_size attribute can be found
at http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
Change-Id: Ia2f0a445f0170a7325f69259b5e7fb35a9f14921
diff --git a/libc/include/malloc.h b/libc/include/malloc.h
index eaedc49..9a4e324 100644
--- a/libc/include/malloc.h
+++ b/libc/include/malloc.h
@@ -27,16 +27,16 @@
__BEGIN_DECLS
-extern void* malloc(size_t byte_count) __mallocfunc __wur;
-extern void* calloc(size_t item_count, size_t item_size) __mallocfunc __wur;
-extern void* realloc(void* p, size_t byte_count) __wur;
+extern void* malloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1)));
+extern void* calloc(size_t item_count, size_t item_size) __mallocfunc __wur __attribute__((alloc_size(1,2)));
+extern void* realloc(void* p, size_t byte_count) __wur __attribute__((alloc_size(2)));
extern void free(void* p);
-extern void* memalign(size_t alignment, size_t byte_count) __mallocfunc __wur;
+extern void* memalign(size_t alignment, size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(2)));
extern size_t malloc_usable_size(const void* p);
-extern void* valloc(size_t byte_count) __mallocfunc __wur;
-extern void* pvalloc(size_t byte_count) __mallocfunc __wur;
+extern void* valloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1)));
+extern void* pvalloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1)));
#ifndef STRUCT_MALLINFO_DECLARED
#define STRUCT_MALLINFO_DECLARED 1