Instrument SSL sockets using MemoryDumpProvider

net/ssl/ssl_client_session_cache.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_SSL_SSL_CLIENT_SESSION_CACHE_H
 #define NET_SSL_SSL_CLIENT_SESSION_CACHE_H
 
 #include <stddef.h>
 #include <time.h>
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/containers/mru_cache.h"
 #include "base/macros.h"
 #include "base/memory/memory_coordinator_client.h"
 #include "base/memory/memory_pressure_monitor.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "net/base/net_export.h"
 #include "third_party/boringssl/src/include/openssl/base.h"
 
 namespace base {
 class Clock;
+namespace trace_event {
+class ProcessMemoryDump;
+}
 }
 
 namespace net {
 
 class NET_EXPORT SSLClientSessionCache : public base::MemoryCoordinatorClient {
  public:
   struct Config {
     // The maximum number of entries in the cache.
     size_t max_entries = 1024;
     // The number of calls to Lookup before a new check for expired sessions.
@@ skipping 12 matching lines @@
   // Inserts |session| into the cache at |cache_key|. If there is an existing
   // one, it is released. Every |expiration_check_count| calls, the cache is
   // checked for stale entries.
   void Insert(const std::string& cache_key, SSL_SESSION* session);
 
   // Removes all entries from the cache.
   void Flush();
 
   void SetClockForTesting(std::unique_ptr<base::Clock> clock);
 
+  // Dumps memory allocation stats. |pmd| is the ProcessMemoryDump of the
+  // browser process.
+  void DumpMemoryStats(base::trace_event::ProcessMemoryDump* pmd);
+
  private:
   // base::MemoryCoordinatorClient implementation:
   void OnMemoryStateChange(base::MemoryState state) override;
 
   // Returns true if |entry| is expired as of |now|.
   bool IsExpired(SSL_SESSION* session, time_t now);
 
   // Removes all expired sessions from the cache.
   void FlushExpiredSessions();
 
@@ skipping 12 matching lines @@
   base::Lock lock_;
 
   std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 
   DISALLOW_COPY_AND_ASSIGN(SSLClientSessionCache);
 };
 
 }  // namespace net
 
 #endif  // NET_SSL_SSL_CLIENT_SESSION_CACHE_H