Debugging in kernel shaping up.

runtime/vm/kernel_binary.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.
 #if !defined(DART_PRECOMPILED_RUNTIME)
 
 #include "platform/globals.h"
 #include "vm/flags.h"
 #include "vm/growable_array.h"
 #include "vm/kernel.h"
 #include "vm/kernel_to_il.h"
@@ skipping 351 matching lines @@
       // 11...
       ASSERT(offset_ + 4 <= size_);
       uint32_t value = ((byte0 & ~0xc0) << 24) | (buffer_[offset_ + 1] << 16) |
                        (buffer_[offset_ + 2] << 8) |
                        (buffer_[offset_ + 3] << 0);
       offset_ += 4;
       return value;
     }
   }
 
+  void add_token_position(
+      MallocGrowableArray<MallocGrowableArray<intptr_t>*>* list,
+      TokenPosition position) {
+    intptr_t size = list->length();
+    while (size <= current_script_id_) {
+      MallocGrowableArray<intptr_t>* tmp = new MallocGrowableArray<intptr_t>();
+      list->Add(tmp);
+      size = list->length();
+    }
+    list->At(current_script_id_)->Add(position.value());
+  }
+
+  void record_token_position(TokenPosition position) {
+    if (position.IsReal()) {
+      add_token_position(&helper()->program()->valid_token_positions, position);
+    }
+  }
+
+  void record_yield_token_position(TokenPosition position) {
+    add_token_position(&helper()->program()->yield_token_positions, position);
+  }
+
   /**
    * Read and return a TokenPosition from this reader.
+   * @param record specifies whether or not the read position is saved as a
+   * valid token position in the current script.
+   * If not be sure to record it later by calling record_token_position (after
+   * setting the correct current_script_id).
    */
-  TokenPosition ReadPosition() {
+  TokenPosition ReadPosition(bool record = true) {
     // Position is saved as unsigned,
     // but actually ranges from -1 and up (thus the -1)
     intptr_t value = ReadUInt() - 1;
     TokenPosition result = TokenPosition(value);
     max_position_ = Utils::Maximum(max_position_, result);
     if (min_position_.IsNoSource()) {
       min_position_ = result;
     } else if (result.IsReal()) {
       min_position_ = Utils::Minimum(min_position_, result);
     }
 
+    if (record) {
+      record_token_position(result);
+    }
     return result;
   }
 
   intptr_t ReadListLength() { return ReadUInt(); }
 
   uint8_t ReadByte() { return buffer_[offset_++]; }
 
   bool ReadBool() { return (ReadByte() & 1) == 1; }
 
   word ReadFlags() { return ReadByte(); }
@@ skipping 268 matching lines @@
 
   fields().ReadFrom<Field>(reader, this);
   procedures().ReadFrom<Procedure>(reader, this);
   return this;
 }
 
 
 Class* Class::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
 
-  position_ = reader->ReadPosition();
+  position_ = reader->ReadPosition(false);
   is_abstract_ = reader->ReadBool();
   name_ = Reference::ReadStringFrom(reader);
   source_uri_index_ = reader->ReadUInt();
   reader->set_current_script_id(source_uri_index_);
+  reader->record_token_position(position_);
   annotations_.ReadFromStatic<Expression>(reader);
 
   return this;
 }
 
 
 NormalClass* NormalClass::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   Class::ReadFrom(reader);
   TypeParameterScope<ReaderHelper> scope(reader->helper());
@@ skipping 110 matching lines @@
   int index = reader->ReadUInt();
   return reader->helper()->program()->string_table().strings()[index];
 }
 
 
 Field* Field::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   Tag tag = reader->ReadTag();
   ASSERT(tag == kField);
 
-  position_ = reader->ReadPosition();
-  end_position_ = reader->ReadPosition();
+  position_ = reader->ReadPosition(false);
+  end_position_ = reader->ReadPosition(false);
   flags_ = reader->ReadFlags();
   name_ = Name::ReadFrom(reader);
   source_uri_index_ = reader->ReadUInt();
   reader->set_current_script_id(source_uri_index_);
+  reader->record_token_position(position_);
+  reader->record_token_position(end_position_);
   annotations_.ReadFromStatic<Expression>(reader);
   type_ = DartType::ReadFrom(reader);
   inferred_value_ = reader->ReadOptional<InferredValue>();
   initializer_ = reader->ReadOptional<Expression>();
   return this;
 }
 
 
 Constructor* Constructor::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
@@ skipping 11 matching lines @@
   return this;
 }
 
 
 Procedure* Procedure::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   Tag tag = reader->ReadTag();
   ASSERT(tag == kProcedure);
 
   VariableScope<ReaderHelper> parameters(reader->helper());
-  position_ = reader->ReadPosition();
-  end_position_ = reader->ReadPosition();
+  position_ = reader->ReadPosition(false);
+  end_position_ = reader->ReadPosition(false);
   kind_ = static_cast<ProcedureKind>(reader->ReadByte());
   flags_ = reader->ReadFlags();
   name_ = Name::ReadFrom(reader);
   source_uri_index_ = reader->ReadUInt();
   reader->set_current_script_id(source_uri_index_);
+  reader->record_token_position(position_);
+  reader->record_token_position(end_position_);
   annotations_.ReadFromStatic<Expression>(reader);
   function_ = reader->ReadOptional<FunctionNode>();
   return this;
 }
 
 
 Initializer* Initializer::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   Tag tag = reader->ReadTag();
   switch (tag) {
@@ skipping 789 matching lines @@
   tf->body_ = Statement::ReadFrom(reader);
   tf->finalizer_ = Statement::ReadFrom(reader);
   return tf;
 }
 
 
 YieldStatement* YieldStatement::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   YieldStatement* stmt = new YieldStatement();
   stmt->position_ = reader->ReadPosition();
+  reader->record_yield_token_position(stmt->position_);
   stmt->flags_ = reader->ReadByte();
   stmt->expression_ = Expression::ReadFrom(reader);
   return stmt;
 }
 
 
 VariableDeclaration* VariableDeclaration::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   Tag tag = reader->ReadTag();
   ASSERT(tag == kVariableDeclaration);
@@ skipping 219 matching lines @@
 
 kernel::Program* ReadPrecompiledKernelFromBuffer(const uint8_t* buffer,
                                                  intptr_t buffer_length) {
   kernel::Reader reader(buffer, buffer_length);
   return kernel::Program::ReadFrom(&reader);
 }
 
 
 }  // namespace dart
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)