Add more generic version of reloc info padding to ensure enough space for rel...

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 166 matching lines @@
   // possible break locations. kNoPosition is used to indicate an
   // invalid/uninitialized position value.
   static const int kNoPosition = -1;
 
   // This string is used to add padding comments to the reloc info in cases
   // where we are not sure to have enough space for patching in during
   // lazy deoptimization. This is the case if we have indirect calls for which
   // we do not normally record relocation info.
   static const char* kFillerCommentString;
 
+  // The size of a comment is equal to tree bytes for the extra tagged pc +
+  // the tag for the data, and kPointerSize for the actual pointer to the
+  // comment.
+  static const int kRelocCommentSize = 3 + kPointerSize;
+
+  // The maximum size for a call instruction including pc-jump.
+  static const int kMaxCallSize = 6;
+
   enum Mode {
     // Please note the order is important (see IsCodeTarget, IsGCRelocMode).
     CONSTRUCT_CALL,  // code target that is a call to a JavaScript constructor.
     CODE_TARGET_CONTEXT,  // Code target used for contextual loads and stores.
     DEBUG_BREAK,  // Code target for the debugger statement.
     CODE_TARGET,  // Code target which is not any of the above.
     EMBEDDED_OBJECT,
     GLOBAL_PROPERTY_CELL,
 
     // Everything after runtime_entry (inclusive) is not GC'ed.
@@ skipping 572 matching lines @@
   return num_bits_set;
 }
 
 // Computes pow(x, y) with the special cases in the spec for Math.pow.
 double power_double_int(double x, int y);
 double power_double_double(double x, double y);
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_