[deoptimizer] Fix Deoptimizer::GetDeoptInfo for last entry.

src/deoptimizer.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 "src/deoptimizer.h"
 
 #include <memory>
 
 #include "src/accessors.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 2696 matching lines @@
 
   // For interpreter frame, skip the accumulator.
   if (frame_it->kind() == TranslatedFrame::kInterpretedFunction) {
     stack_it++;
   }
   CHECK(stack_it == frame_it->end());
 }
 
 
 Deoptimizer::DeoptInfo Deoptimizer::GetDeoptInfo(Code* code, Address pc) {
+  CHECK(code->instruction_start() <= pc && pc <= code->instruction_end());
   SourcePosition last_position = SourcePosition::Unknown();
   DeoptimizeReason last_reason = DeoptimizeReason::kNoReason;
   int last_deopt_id = kNoDeoptimizationId;
   int mask = RelocInfo::ModeMask(RelocInfo::DEOPT_REASON) |
              RelocInfo::ModeMask(RelocInfo::DEOPT_ID) |
              RelocInfo::ModeMask(RelocInfo::DEOPT_SCRIPT_OFFSET) |
              RelocInfo::ModeMask(RelocInfo::DEOPT_INLINING_ID);
   for (RelocIterator it(code, mask); !it.done(); it.next()) {
     RelocInfo* info = it.rinfo();
-    if (info->pc() >= pc) {
-      return DeoptInfo(last_position, last_reason, last_deopt_id);
-    }
+    if (info->pc() >= pc) break;
     if (info->rmode() == RelocInfo::DEOPT_SCRIPT_OFFSET) {
       int script_offset = static_cast<int>(info->data());
       it.next();
       DCHECK(it.rinfo()->rmode() == RelocInfo::DEOPT_INLINING_ID);
       int inlining_id = static_cast<int>(it.rinfo()->data());
       last_position = SourcePosition(script_offset, inlining_id);
     } else if (info->rmode() == RelocInfo::DEOPT_ID) {
       last_deopt_id = static_cast<int>(info->data());
     } else if (info->rmode() == RelocInfo::DEOPT_REASON) {
       last_reason = static_cast<DeoptimizeReason>(info->data());
     }
   }
-  return DeoptInfo(SourcePosition::Unknown(), DeoptimizeReason::kNoReason, -1);
+  return DeoptInfo(last_position, last_reason, last_deopt_id);
 }
 
 
 // static
 int Deoptimizer::ComputeSourcePositionFromBaselineCode(
     SharedFunctionInfo* shared, BailoutId node_id) {
   DCHECK(shared->HasBaselineCode());
   Code* code = shared->code();
   FixedArray* raw_data = code->deoptimization_data();
   DeoptimizationOutputData* data = DeoptimizationOutputData::cast(raw_data);
@@ skipping 1256 matching lines @@
       CHECK(value_info->IsMaterializedObject());
 
       value_info->value_ =
           Handle<Object>(previously_materialized_objects->get(i), isolate_);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8