Make snapshots 32 or 64 bit compliant by using Write<int64_t> and Read<int64_t> for intptr_t type...

vm/globals.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_GLOBALS_H_
 #define VM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined to enable platform independent printf.
 #ifndef __STDC_FORMAT_MACROS
 #define __STDC_FORMAT_MACROS
@@ skipping 150 matching lines @@
 
 // Bit sizes.
 const int kBitsPerByte = 8;
 const int kBitsPerByteLog2 = 3;
 const int kBitsPerWord = kWordSize * kBitsPerByte;
 
 // System-wide named constants.
 const int KB = 1024;
 const int MB = KB * KB;
 const int GB = KB * KB * KB;
+const intptr_t kIntptrOne = 1;
+const intptr_t kIntptrMin = (kIntptrOne << (kBitsPerWord - 1));
+const intptr_t kIntptrMax = ~kIntptrMin;
 
 // Time constants.
 const int kMillisecondsPerSecond = 1000;
 const int kMicrosecondsPerMillisecond = 1000;
 const int kMicrosecondsPerSecond = (kMicrosecondsPerMillisecond *
                                     kMillisecondsPerSecond);
 const int kNanosecondsPerMicrosecond = 1000;
 const int kNanosecondsPerMillisecond = (kNanosecondsPerMicrosecond *
                                         kMicrosecondsPerMillisecond);
 const int kNanosecondsPerSecond = (kNanosecondsPerMicrosecond *
@@ skipping 170 matching lines @@
 // contants are 16 byte aligned.
 #if defined(TARGET_OS_WINDOWS)
 #define ALIGN16 __declspec(align(16))
 #else
 #define ALIGN16 __attribute__((aligned(16)))
 #endif
 
 }  // namespace dart
 
 #endif  // VM_GLOBALS_H_