Externalize deoptimization reasons.

src/disassembler.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 177 matching lines @@
         out.AddPadding(' ', kRelocInfoPosition);
       }
 
       RelocInfo::Mode rmode = relocinfo.rmode();
       if (RelocInfo::IsPosition(rmode)) {
         if (RelocInfo::IsStatementPosition(rmode)) {
           out.AddFormatted("    ;; debug: statement %d", relocinfo.data());
         } else {
           out.AddFormatted("    ;; debug: position %d", relocinfo.data());
         }
+      } else if (rmode == RelocInfo::DEOPT_REASON) {
+        Deoptimizer::DeoptReason reason =
+            static_cast<Deoptimizer::DeoptReason>(relocinfo.data());
+        out.AddFormatted("    ;; debug: deopt reason '%s'",
+                         Deoptimizer::GetDeoptReason(reason));
       } else if (rmode == RelocInfo::EMBEDDED_OBJECT) {
         HeapStringAllocator allocator;
         StringStream accumulator(&allocator);
         relocinfo.target_object()->ShortPrint(&accumulator);
         SmartArrayPointer<const char> obj_name = accumulator.ToCString();
         out.AddFormatted("    ;; object: %s", obj_name.get());
       } else if (rmode == RelocInfo::EXTERNAL_REFERENCE) {
         const char* reference_name =
             ref_encoder.NameOfAddress(relocinfo.target_reference());
         out.AddFormatted("    ;; external reference (%s)", reference_name);
@@ skipping 98 matching lines @@
 #else  // ENABLE_DISASSEMBLER
 
 int Disassembler::Decode(Isolate* isolate, std::ostream* os, byte* begin,
                          byte* end, Code* code) {
   return 0;
 }
 
 #endif  // ENABLE_DISASSEMBLER
 
 } }  // namespace v8::internal