!835 Add hook_calloc for hook

Merge pull request !835 from dhy308/add_hook_calloc

porting/linux/user/src/hook/musl_malloc.h

@@ -20,9 +20,13 @@ extern void* je_realloc(void* p, size_t newsize);
 extern void je_free(void* p);
 #define MuslFunc(func) je_ ## func
 #else
-extern void* __libc_malloc(size_t size);
+extern void *__libc_malloc(size_t size);
 extern void __libc_free(void* p);
-#define MuslFunc(func) __libc_ ## func
+extern void *hook_calloc(size_t, size_t);
+#define hook_malloc __libc_malloc 
+#define hook_free __libc_free 
+#define hook_realloc __libc_realloc 
+#define MuslFunc(func) hook_ ## func
 #endif
 
 void *__libc_mmap(void*, size_t, int, int, int, off_t);

porting/linux/user/src/malloc/libc_calloc.c

@@ -37,17 +37,25 @@ void *__libc_calloc(size_t m, size_t n)
 		return 0;
 	}
 	n *= m;
-#ifdef HOOK_ENABLE
-#ifdef USE_JEMALLOC
 	void *p = __libc_malloc(n);
-#else
+	if (!p || (!__malloc_replaced && __malloc_allzerop(p)))
+		return p;
+	n = mal0_clear(p, n);
+	return memset(p, 0, n);
+}
+
+#ifdef HOOK_ENABLE
+void *hook_calloc(size_t m, size_t n)
+{
+	if (n && m > (size_t)-1/n) {
+		errno = ENOMEM;
+		return 0;
+	}
+	n *= m;
 	void *p = malloc(n);
-#endif
-#else
-	void *p = __libc_malloc(n);
-#endif
 	if (!p || (!__malloc_replaced && __malloc_allzerop(p)))
 		return p;
 	n = mal0_clear(p, n);
 	return memset(p, 0, n);
 }
+#endif
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