Don't use %p when generating disassembly in vm service.

runtime/platform/globals.h

 // 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.
 
 #ifndef PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
@@ skipping 288 matching lines @@
 
 
 // Short form printf format specifiers
 #define Pd PRIdPTR
 #define Pu PRIuPTR
 #define Px PRIxPTR
 #define Pd64 PRId64
 #define Pu64 PRIu64
 #define Px64 PRIx64
 
+// Zero-padded pointer
+#if defined(ARCH_IS_32_BIT)
+#define Pp "08" PRIxPTR
+#else
+#define Pp "016" PRIxPTR
+#endif
+
 
 // Suffixes for 64-bit integer literals.
 #ifdef _MSC_VER
 #define DART_INT64_C(x) x##I64
 #define DART_UINT64_C(x) x##UI64
 #else
 #define DART_INT64_C(x) x##LL
 #define DART_UINT64_C(x) x##ULL
 #endif
 
@@ skipping 276 matching lines @@
 
 #if defined(_WIN32)
 #define STDIN_FILENO 0
 #define STDOUT_FILENO 1
 #define STDERR_FILENO 2
 #endif
 
 }  // namespace dart
 
 #endif  // PLATFORM_GLOBALS_H_