[perf-prof] Fix erroneous code offsets in unwinding info

src/compiler/code-generator.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/compiler/code-generator.h"
 
 #include "src/address-map.h"
 #include "src/assembler-inl.h"
 #include "src/base/adapters.h"
 #include "src/compilation-info.h"
@@ skipping 202 matching lines @@
 
   // Emit the jump tables.
   if (jump_tables_) {
     masm()->Align(kPointerSize);
     for (JumpTable* table = jump_tables_; table; table = table->next()) {
       masm()->bind(table->label());
       AssembleJumpTable(table->targets(), table->target_count());
     }
   }
 
+  // The PerfJitLogger logs code up until here, excluding the safepoint
+  // table. Resolve the unwinding info now so it is aware of the same code size
+  // as reported by perf.
+  unwinding_info_writer_.Finish(masm()->pc_offset());
+
   safepoints()->Emit(masm(), frame()->GetTotalFrameSlotCount());
 
-  unwinding_info_writer_.Finish(masm()->pc_offset());
-
   Handle<Code> result = v8::internal::CodeGenerator::MakeCodeEpilogue(
       masm(), unwinding_info_writer_.eh_frame_writer(), info, Handle<Object>());
   result->set_is_turbofanned(true);
   result->set_stack_slots(frame()->GetTotalFrameSlotCount());
   result->set_safepoint_table_offset(safepoints()->GetCodeOffset());
   Handle<ByteArray> source_positions =
       source_position_table_builder_.ToSourcePositionTable(
           isolate(), Handle<AbstractCode>::cast(result));
   result->set_source_position_table(*source_positions);
 
@@ skipping 761 matching lines @@
     : frame_(gen->frame()), masm_(gen->masm()), next_(gen->ools_) {
   gen->ools_ = this;
 }
 
 
 OutOfLineCode::~OutOfLineCode() {}
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8