[compiler-rt] check max address from kernel is <= mmap range size

If these sizes do not match, asan will not work as expected. Previously, we added compile-time checks for non-iOS platforms. We check at run time for iOS because we get the max VM size from the kernel at run time.

rdar://76477969

Reviewed By: delcypher

Differential Revision: https://reviews.llvm.org/D100784

compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp

@@ -1185,7 +1185,9 @@ static uptr GetTaskInfoMaxAddress() {
 uptr GetMaxUserVirtualAddress() {
   static uptr max_vm = GetTaskInfoMaxAddress();
   if (max_vm != 0) {
-    return max_vm - 1;
+    const uptr ret_value = max_vm - 1;
+    CHECK_LE(ret_value, SANITIZER_MMAP_RANGE_SIZE);
+    return ret_value;
   }
 
   // xnu cannot provide vm address limit