DWARF and unwind support for AOT assembly output.

runtime/vm/clustered_snapshot.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/clustered_snapshot.h"
 
 #include "platform/assert.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
@@ skipping 1549 matching lines @@
 
   void Trace(Serializer* s, RawObject* object) {
     RawCode* code = Code::RawCast(object);
     objects_.Add(code);
 
     s->Push(code->ptr()->object_pool_);
     s->Push(code->ptr()->owner_);
     s->Push(code->ptr()->exception_handlers_);
     s->Push(code->ptr()->pc_descriptors_);
     s->Push(code->ptr()->stackmaps_);
-    s->Push(code->ptr()->inlined_id_to_function_);
-    s->Push(code->ptr()->code_source_map_);
+    if (!FLAG_dwarf_stack_traces) {
+      s->Push(code->ptr()->inlined_id_to_function_);
+      s->Push(code->ptr()->code_source_map_);
+    }
 
     if (s->kind() == Snapshot::kAppJIT) {
       s->Push(code->ptr()->deopt_info_array_);
       s->Push(code->ptr()->static_calls_target_table_);
       NOT_IN_PRODUCT(s->Push(code->ptr()->return_address_metadata_));
     }
   }
 
   void WriteAlloc(Serializer* s) {
     s->WriteCid(kCodeCid);
@@ skipping 32 matching lines @@
           text_offset = s->GetTextOffset(instr, code);
         }
         s->Write<int32_t>(text_offset);
       }
 
       s->WriteRef(code->ptr()->object_pool_);
       s->WriteRef(code->ptr()->owner_);
       s->WriteRef(code->ptr()->exception_handlers_);
       s->WriteRef(code->ptr()->pc_descriptors_);
       s->WriteRef(code->ptr()->stackmaps_);
-      s->WriteRef(code->ptr()->inlined_id_to_function_);
-      s->WriteRef(code->ptr()->code_source_map_);
+      if (FLAG_dwarf_stack_traces) {
+        s->WriteRef(Array::null());
+        s->WriteRef(CodeSourceMap::null());
+      } else {
+        s->WriteRef(code->ptr()->inlined_id_to_function_);
+        s->WriteRef(code->ptr()->code_source_map_);
+      }
 
       if (s->kind() == Snapshot::kAppJIT) {
         s->WriteRef(code->ptr()->deopt_info_array_);
         s->WriteRef(code->ptr()->static_calls_target_table_);
         NOT_IN_PRODUCT(s->WriteRef(code->ptr()->return_address_metadata_));
       }
 
       s->Write<int32_t>(code->ptr()->state_bits_);
     }
   }
@@ skipping 3878 matching lines @@
     thread_->isolate()->SetupImagePage(data_buffer_,
                                        /* is_executable */ false);
   }
 
   deserializer.ReadIsolateSnapshot(thread_->isolate()->object_store());
 
   return ApiError::null();
 }
 
 }  // namespace dart