Externalize deoptimization reasons.

src/objects.cc

 // Copyright 2013 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 <sstream>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
@@ skipping 10989 matching lines @@
     }
     default:
       UNREACHABLE();
       break;
   }
   return NULL;
 }
 
 
 void Code::PrintDeoptLocation(FILE* out, int bailout_id) {
-  const char* last_comment = NULL;
-  int mask = RelocInfo::ModeMask(RelocInfo::COMMENT)
-      | RelocInfo::ModeMask(RelocInfo::RUNTIME_ENTRY);
+  int last_position = 0;
+  Deoptimizer::DeoptReason last_reason = Deoptimizer::kNoReason;
+  int mask = RelocInfo::ModeMask(RelocInfo::DEOPT_REASON) |
+             RelocInfo::ModeMask(RelocInfo::POSITION) |
+             RelocInfo::ModeMask(RelocInfo::RUNTIME_ENTRY);
   for (RelocIterator it(this, mask); !it.done(); it.next()) {
     RelocInfo* info = it.rinfo();
-    if (info->rmode() == RelocInfo::COMMENT) {
-      last_comment = reinterpret_cast<const char*>(info->data());
-    } else if (last_comment != NULL) {
+    if (info->rmode() == RelocInfo::POSITION) {
+      last_position = static_cast<int>(info->data());
+    } else if (info->rmode() == RelocInfo::DEOPT_REASON) {
+      last_reason = static_cast<Deoptimizer::DeoptReason>(info->data());
+    } else if (last_reason != Deoptimizer::kNoReason) {
       if ((bailout_id == Deoptimizer::GetDeoptimizationId(
               GetIsolate(), info->target_address(), Deoptimizer::EAGER)) ||
           (bailout_id == Deoptimizer::GetDeoptimizationId(
               GetIsolate(), info->target_address(), Deoptimizer::SOFT)) ||
           (bailout_id == Deoptimizer::GetDeoptimizationId(
               GetIsolate(), info->target_address(), Deoptimizer::LAZY))) {
         CHECK(RelocInfo::IsRuntimeEntry(info->rmode()));
-        PrintF(out, "            %s\n", last_comment);
+        PrintF(out, "            ;;; deoptimize at %d: %s\n", last_position,
+               Deoptimizer::GetDeoptReason(last_reason));
         return;
       }
     }
   }
 }
 
 
 bool Code::CanDeoptAt(Address pc) {
   DeoptimizationInputData* deopt_data =
       DeoptimizationInputData::cast(deoptimization_data());
@@ skipping 5839 matching lines @@
   Handle<DependentCode> codes =
       DependentCode::Insert(handle(cell->dependent_code(), info->isolate()),
                             DependentCode::kPropertyCellChangedGroup,
                             info->object_wrapper());
   if (*codes != cell->dependent_code()) cell->set_dependent_code(*codes);
   info->dependencies(DependentCode::kPropertyCellChangedGroup)->Add(
       cell, info->zone());
 }
 
 } }  // namespace v8::internal