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D2107.id4414.diff
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Index: include/stdlib.h
===================================================================
--- include/stdlib.h
+++ include/stdlib.h
@@ -87,21 +87,21 @@
long atol(const char *);
void *bsearch(const void *, const void *, size_t,
size_t, int (*)(const void *, const void *));
-void *calloc(size_t, size_t) __malloc_like;
+void *calloc(size_t, size_t) __malloc_like __result_use_check __alloc_size(1, 2);
div_t div(int, int) __pure2;
_Noreturn void exit(int);
void free(void *);
char *getenv(const char *);
long labs(long) __pure2;
ldiv_t ldiv(long, long) __pure2;
-void *malloc(size_t) __malloc_like;
+void *malloc(size_t) __malloc_like __result_use_check __alloc_size(1);
int mblen(const char *, size_t);
size_t mbstowcs(wchar_t * __restrict , const char * __restrict, size_t);
int mbtowc(wchar_t * __restrict, const char * __restrict, size_t);
void qsort(void *, size_t, size_t,
int (*)(const void *, const void *));
int rand(void);
-void *realloc(void *, size_t);
+void *realloc(void *, size_t) __result_use_check __alloc_size(2);
void srand(unsigned);
double strtod(const char * __restrict, char ** __restrict);
float strtof(const char * __restrict, char ** __restrict);
@@ -155,7 +155,7 @@
* If we're in a mode greater than C99, expose C11 functions.
*/
#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
-void * aligned_alloc(size_t, size_t) __malloc_like;
+void * aligned_alloc(size_t, size_t) __malloc_like __alloc_size(2);
int at_quick_exit(void (*)(void));
_Noreturn void
quick_exit(int);
@@ -170,7 +170,8 @@
int rand_r(unsigned *); /* (TSF) */
#endif
#if __POSIX_VISIBLE >= 200112
-int posix_memalign(void **, size_t, size_t); /* (ADV) */
+int posix_memalign(void **, size_t, size_t) __nonnull(1)
+ __alloc_size(3); /* (ADV) */
int setenv(const char *, const char *, int);
int unsetenv(const char *);
#endif
@@ -301,7 +302,7 @@
int (*)(void *, const void *, const void *));
int radixsort(const unsigned char **, int, const unsigned char *,
unsigned);
-void *reallocf(void *, size_t);
+void *reallocf(void *, size_t) __alloc_size(2);
int rpmatch(const char *);
void setprogname(const char *);
int sradixsort(const unsigned char **, int, const unsigned char *,
Index: sys/sys/cdefs.h
===================================================================
--- sys/sys/cdefs.h
+++ sys/sys/cdefs.h
@@ -40,6 +40,9 @@
* Testing against Clang-specific extensions.
*/
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
#ifndef __has_extension
#define __has_extension __has_feature
#endif
@@ -209,6 +212,7 @@
#define __unused
#define __packed
#define __aligned(x)
+#define __alloc_size(...)
#define __section(x)
#define __weak
#else
@@ -233,6 +237,11 @@
#define __aligned(x) __attribute__((__aligned__(x)))
#define __section(x) __attribute__((__section__(x)))
#endif
+#if __has_attribute(alloc_size) || __GNUC_PREREQ__(4, 3)
+#define __alloc_size(...) __attribute__((alloc_size(__VA_ARGS__)))
+#else
+#define __alloc_size(...)
+#endif
#if defined(__INTEL_COMPILER)
#define __dead2 __attribute__((__noreturn__))
#define __pure2 __attribute__((__const__))
@@ -242,7 +251,7 @@
#define __aligned(x) __attribute__((__aligned__(x)))
#define __section(x) __attribute__((__section__(x)))
#endif
-#endif
+#endif /* lint */
#if !__GNUC_PREREQ__(2, 95)
#define __alignof(x) __offsetof(struct { char __a; x __b; }, __b)
@@ -363,8 +372,10 @@
#if __GNUC_PREREQ__(3, 4)
#define __fastcall __attribute__((__fastcall__))
+#define __result_use_check __attribute__((__warn_unused_result__))
#else
#define __fastcall
+#define __result_use_check
#endif
#if __GNUC_PREREQ__(4, 1)

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