Make sure we always have room for patching the reloc info during lazy deoptim...

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 160 matching lines @@
   // in the relocation information. Two types of source positions are collected
   // "position" (RelocMode position) and "statement position" (RelocMode
   // statement_position). The "position" is collected at places in the source
   // code which are of interest when making stack traces to pin-point the source
   // location of a stack frame as close as possible. The "statement position" is
   // collected at the beginning at each statement, and is used to indicate
   // 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;
+
   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_