[kernel] Free memory for kernel data.

runtime/vm/kernel.h

 // 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.
 
 #ifndef RUNTIME_VM_KERNEL_H_
 #define RUNTIME_VM_KERNEL_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 #include "platform/assert.h"
 #include "vm/allocation.h"
@@ skipping 98 matching lines @@
   };
 };
 
 class LogicalExpression {
  public:
   enum Operator { kAnd, kOr };
 };
 
 class Program {
  public:
+  ~Program() {
+    if (kernel_data_ != NULL) {

[Kevin Millikin (Google), 2017/08/14 06:20:50]

free checks for null.  It's clunky to check here, so don't.

[jensj, 2017/08/14 08:38:12]

Done.

+      free(const_cast<uint8_t*>(kernel_data_));
+      kernel_data_ = NULL;
+    }
+  }
+
   static Program* ReadFrom(Reader* reader);
 
   NameIndex main_method() { return main_method_reference_; }
   intptr_t string_table_offset() { return string_table_offset_; }
   intptr_t name_table_offset() { return name_table_offset_; }
   const uint8_t* kernel_data() { return kernel_data_; }
   intptr_t kernel_data_size() { return kernel_data_size_; }
   intptr_t library_count() { return library_count_; }
 
  private:
@@ skipping 19 matching lines @@
 
 }  // namespace kernel
 
 kernel::Program* ReadPrecompiledKernelFromBuffer(const uint8_t* buffer,
                                                  intptr_t buffer_length);
 
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_H_