Added isolate + thread high watermark tracking to Observatory

runtime/vm/thread.h

 // Copyright (c) 2015, 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_THREAD_H_
 #define RUNTIME_VM_THREAD_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/atomic.h"
@@ skipping 246 matching lines @@
   void set_os_thread(OSThread* os_thread) { os_thread_ = os_thread; }
 
   // Monitor corresponding to this thread.
   Monitor* thread_lock() const { return thread_lock_; }
 
   // The topmost zone used for allocation in this thread.
   Zone* zone() const { return zone_; }
 
   bool ZoneIsOwnedByThread(Zone* zone) const;
 
+  void IncrementMemoryUsage(uintptr_t value) {
+    current_thread_memory_ += value;
+    if (current_thread_memory_ > memory_high_watermark_) {
+      memory_high_watermark_ = current_thread_memory_;
+    }
+  }
+
+  void DecrementMemoryUsage(uintptr_t value) {
+    ASSERT(current_thread_memory_ >= value);
+    current_thread_memory_ -= value;
+  }
+
+  uintptr_t memory_high_watermark() const { return memory_high_watermark_; }
+
+  void ResetHighWatermark() { memory_high_watermark_ = current_thread_memory_; }
+
   // The reusable api local scope for this thread.
   ApiLocalScope* api_reusable_scope() const { return api_reusable_scope_; }
   void set_api_reusable_scope(ApiLocalScope* value) {
     ASSERT(value == NULL || api_reusable_scope_ == NULL);
     api_reusable_scope_ = value;
   }
 
   // The api local scope for this thread, this where all local handles
   // are allocated.
   ApiLocalScope* api_top_scope() const { return api_top_scope_; }
@@ skipping 395 matching lines @@
 #undef DECLARE_MEMBERS
 
 #define DECLARE_MEMBERS(returntype, name, ...) uword name##_entry_point_;
   LEAF_RUNTIME_ENTRY_LIST(DECLARE_MEMBERS)
 #undef DECLARE_MEMBERS
 
   TimelineStream* dart_stream_;
   OSThread* os_thread_;
   Monitor* thread_lock_;
   Zone* zone_;
+  uintptr_t current_thread_memory_;
+  uintptr_t memory_high_watermark_;
   ApiLocalScope* api_reusable_scope_;
   ApiLocalScope* api_top_scope_;
   StackResource* top_resource_;
   LongJumpScope* long_jump_base_;
   int32_t no_callback_scope_depth_;
 #if defined(DEBUG)
   HandleScope* top_handle_scope_;
   int32_t no_handle_scope_depth_;
   int32_t no_safepoint_scope_depth_;
 #endif
@@ skipping 85 matching lines @@
 // Disable thread interrupts.
 class DisableThreadInterruptsScope : public StackResource {
  public:
   explicit DisableThreadInterruptsScope(Thread* thread);
   ~DisableThreadInterruptsScope();
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_THREAD_H_