[kernel] [partial] Streaming of kernel binary without AST nodes

pkg/kernel/lib/binary/ast_to_binary.dart

Index: pkg/kernel/lib/binary/ast_to_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_to_binary.dart b/pkg/kernel/lib/binary/ast_to_binary.dart
index cdc92ea4a0b1724d5ed79c96c784917250418d3e..0edfdd886af300e6086061ec0f33ef07e236a8f0 100644
--- a/pkg/kernel/lib/binary/ast_to_binary.dart
+++ b/pkg/kernel/lib/binary/ast_to_binary.dart
@@ -404,7 +404,7 @@ class BinaryPrinter extends Visitor {
 
   visitLocalInitializer(LocalInitializer node) {
     writeByte(Tag.LocalInitializer);
-    writeVariableDeclaration(node.variable);
+    writeVariableDeclaration(node.variable, false);
   }
 
   visitFunctionNode(FunctionNode node) {
@@ -444,9 +444,11 @@ class BinaryPrinter extends Visitor {
         node.promotedType == null) {
       writeByte(Tag.SpecializedVariableGet + index);
       writeOffset(node.fileOffset);
+      writeUInt30(node.variable.binaryOffset);
     } else {
       writeByte(Tag.VariableGet);
       writeOffset(node.fileOffset);
+      writeUInt30(node.variable.binaryOffset);
       writeUInt30(_variableIndexer[node.variable]);
       writeOptionalNode(node.promotedType);
     }
@@ -458,10 +460,12 @@ class BinaryPrinter extends Visitor {
     if (index & Tag.SpecializedPayloadMask == index) {
       writeByte(Tag.SpecializedVariableSet + index);
       writeOffset(node.fileOffset);
+      writeUInt30(node.variable.binaryOffset);
       writeNode(node.value);
     } else {
       writeByte(Tag.VariableSet);
       writeOffset(node.fileOffset);
+      writeUInt30(node.variable.binaryOffset);
       writeUInt30(_variableIndexer[node.variable]);
       writeNode(node.value);
     }
@@ -566,6 +570,7 @@ class BinaryPrinter extends Visitor {
   }
 
   visitArguments(Arguments node) {
+    writeUInt30(node.positional.length + node.named.length);
     writeNodeList(node.types);
     writeNodeList(node.positional);
     writeNodeList(node.named);
@@ -724,7 +729,7 @@ class BinaryPrinter extends Visitor {
 
   visitLet(Let node) {
     writeByte(Tag.Let);
-    writeVariableDeclaration(node.variable);
+    writeVariableDeclaration(node.variable, false);
     writeNode(node.body);
     --_variableIndexer.stackHeight;
   }
@@ -842,7 +847,7 @@ class BinaryPrinter extends Visitor {
     _variableIndexer.pushScope();
     writeByte(node.isAsync ? Tag.AsyncForInStatement : Tag.ForInStatement);
     writeOffset(node.fileOffset);
-    writeVariableDeclaration(node.variable);
+    writeVariableDeclaration(node.variable, false);
     writeNode(node.iterable);
     writeNode(node.body);
     _variableIndexer.popScope();
@@ -858,8 +863,12 @@ class BinaryPrinter extends Visitor {
 
   visitSwitchCase(SwitchCase node) {
     // Note: there is no tag on SwitchCase.
-    writeNodeList(node.expressions);
-    node.expressionOffsets.forEach(writeOffset);
+    int length = node.expressions.length;
+    writeUInt30(length);
+    for (int i = 0; i < length; ++i) {
+      writeOffset(node.expressionOffsets[i]);
+      writeNode(node.expressions[i]);
+    }
     writeByte(node.isDefault ? 1 : 0);
     writeNode(node.body);
   }
@@ -885,6 +894,13 @@ class BinaryPrinter extends Visitor {
   visitTryCatch(TryCatch node) {
     writeByte(Tag.TryCatch);
     writeNode(node.body);
+    if (node.catches.any((Catch c) => c.stackTrace != null)) {
+      // at least one catch needs the stack trace.
+      writeByte(1);
+    } else {
+      // no catch needs the stack trace.
+      writeByte(0);
+    }
     writeNodeList(node.catches);
   }
 
@@ -912,11 +928,13 @@ class BinaryPrinter extends Visitor {
   }
 
   visitVariableDeclaration(VariableDeclaration node) {
-    writeByte(Tag.VariableDeclaration);
-    writeVariableDeclaration(node);
+    writeVariableDeclaration(node, true);
   }
 
-  void writeVariableDeclaration(VariableDeclaration node) {
+  void writeVariableDeclaration(VariableDeclaration node,
+      [bool hasTag = false]) {
+    node.binaryOffset = _sink.flushedLength + _sink.length;
+    if (hasTag) writeByte(Tag.VariableDeclaration);
     writeOffset(node.fileOffset);
     writeOffset(node.fileEqualsOffset);
     writeByte(node.flags);
@@ -937,14 +955,14 @@ class BinaryPrinter extends Visitor {
       writeByte(Tag.Nothing);
     } else {
       writeByte(Tag.Something);
-      writeVariableDeclaration(node);
+      writeVariableDeclaration(node, false);
     }
   }
 
   visitFunctionDeclaration(FunctionDeclaration node) {
     writeByte(Tag.FunctionDeclaration);
     writeOffset(node.fileOffset);
-    writeVariableDeclaration(node.variable);
+    writeVariableDeclaration(node.variable, false);
     writeNode(node.function);
   }
 
@@ -998,6 +1016,8 @@ class BinaryPrinter extends Visitor {
       _typeParameterIndexer.enter(node.typeParameters);
       writeNodeList(node.typeParameters);
       writeUInt30(node.requiredParameterCount);
+      writeUInt30(
+          node.positionalParameters.length + node.namedParameters.length);
       writeNodeList(node.positionalParameters);
       writeNodeList(node.namedParameters);
       writeNode(node.returnType);
@@ -1013,6 +1033,7 @@ class BinaryPrinter extends Visitor {
   visitTypeParameterType(TypeParameterType node) {
     writeByte(Tag.TypeParameterType);
     writeUInt30(_typeParameterIndexer[node.parameter]);
+    writeUInt30(node.parameter.binaryOffset);
     writeOptionalNode(node.bound);
   }
 
@@ -1027,6 +1048,7 @@ class BinaryPrinter extends Visitor {
   }
 
   visitTypeParameter(TypeParameter node) {
+    node.binaryOffset = _sink.flushedLength + _sink.length;
     writeStringReference(node.name ?? '');
     writeNode(node.bound);
   }
@@ -1307,6 +1329,7 @@ class BufferedSink {
   final Sink<List<int>> _sink;
   Uint8List _buffer = new Uint8List(SIZE);
   int length = 0;
+  int flushedLength = 0;
 
   BufferedSink(this._sink);
 
@@ -1316,6 +1339,7 @@ class BufferedSink {
       _sink.add(_buffer);
       _buffer = new Uint8List(SIZE);
       length = 0;
+      flushedLength += SIZE;
     }
   }
 
@@ -1326,6 +1350,7 @@ class BufferedSink {
         (bytes.length < SMALL || length < SMALL)) {
       if (length == 0) {
         _sink.add(bytes);
+        flushedLength += bytes.length;
       } else {
         _buffer.setRange(length, length + bytes.length, bytes);
         length += bytes.length;
@@ -1341,10 +1366,13 @@ class BufferedSink {
       _buffer = new Uint8List(SIZE);
       _buffer.setRange(0, remainder, bytes, alreadyEmitted);
       length = remainder;
+      flushedLength += SIZE;
     } else {
       _sink.add(_buffer.sublist(0, length));
       _sink.add(bytes);
       _buffer = new Uint8List(SIZE);
+      flushedLength += length;
+      flushedLength += bytes.length;
       length = 0;
     }
   }
@@ -1352,6 +1380,7 @@ class BufferedSink {
   void flush() {
     _sink.add(_buffer.sublist(0, length));
     _buffer = new Uint8List(SIZE);
+    flushedLength += length;
     length = 0;
   }