@@ -3,6 +3,8 @@
// license that can be found in the LICENSE file.
#include "runtime.h"
+#include "arch.h"
+#include "malloc.h"
#include "go-type.h"
#define NOSELGEN 1
@@ -88,7 +90,7 @@
elem = t->__element_type;
- if(hint < 0 || (int32)hint != hint || (elem->__size > 0 && (uintptr)hint > ((uintptr)-1) / elem->__size))
+ if(hint < 0 || (int32)hint != hint || (elem->__size > 0 && (uintptr)hint > MaxMem / elem->__size))
runtime_panicstring("makechan: size out of range");
n = sizeof(*c);
@@ -54,6 +54,9 @@
while (m < count);
}
+ if ((uintptr) m > MaxMem / element_size)
+ runtime_panicstring ("growslice: cap out of range");
+
n = __go_alloc (m * element_size);
__builtin_memcpy (n, a.__values, a.__count * element_size);
@@ -37,7 +37,7 @@
if (cap < len
|| (uintptr_t) icap != cap
|| (std->__element_type->__size > 0
- && cap > (uintptr_t) -1U / std->__element_type->__size))
+ && cap > MaxMem / std->__element_type->__size))
runtime_panicstring ("makeslice: cap out of range");
ret.__count = ilen;
@@ -128,6 +128,15 @@
MaxGcproc = 4,
};
+// Maximum memory allocation size, a hint for callers.
+// This must be a #define instead of an enum because it
+// is so large.
+#if __SIZEOF_POINTER__ == 8
+#define MaxMem (16ULL<<30) /* 16 GB */
+#else
+#define MaxMem ((uintptr)-1)
+#endif
+
// A generic linked list of blocks. (Typically the block is bigger than sizeof(MLink).)
struct MLink
{