Enforce length/size limits for variable size heap object in order to

vm/os_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/os.h"
 
 #include <errno.h>
 #include <limits.h>
 #include <time.h>
 #include <sys/resource.h>
@@ skipping 83 matching lines @@
   const int kMinimumAlignment = 16;
 #else
 #error Unsupported architecture.
 #endif
   word alignment = kMinimumAlignment;
   // TODO(5411554): Allow overriding default code alignment for
   // testing purposes.
   // Flags::DebugIsInt("codealign", &alignment);
   ASSERT(Utils::IsPowerOfTwo(alignment));
   ASSERT(alignment >= kMinimumAlignment);
+  ASSERT(alignment <= OS::kMaxPreferredCodeAlignment);
   return alignment;
 }
 
 
 uword OS::GetStackSizeLimit() {
   struct rlimit stack_limit;
   int retval = getrlimit(RLIMIT_STACK, &stack_limit);
   ASSERT(retval == 0);
   if (stack_limit.rlim_cur > INT_MAX) {
     retval = INT_MAX;
@@ skipping 91 matching lines @@
 void OS::Abort() {
   abort();
 }
 
 
 void OS::Exit(int code) {
   exit(code);
 }
 
 }  // namespace dart