Limit the number of crash reports to enqueue at once

crash_collector.h

 // Copyright (c) 2010 The Chromium OS 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 _CRASH_REPORTER_CRASH_COLLECTOR_H_
 #define _CRASH_REPORTER_CRASH_COLLECTOR_H_
 
 #include <string>
 #include <sys/stat.h>
 
@@ skipping 14 matching lines @@
 
   // Initialize the crash collector for detection of crashes, given a
   // crash counting function, metrics collection enabled oracle, and
   // system logger facility.
   void Initialize(CountCrashFunction count_crash,
                   IsFeedbackAllowedFunction is_metrics_allowed,
                   SystemLogging *logger);
 
  protected:
   friend class CrashCollectorTest;
+  FRIEND_TEST(CrashCollectorTest, CheckHasCapacityOverCore);
+  FRIEND_TEST(CrashCollectorTest, CheckHasCapacityOverNonCore);
   FRIEND_TEST(CrashCollectorTest, GetCrashDirectoryInfo);
   FRIEND_TEST(CrashCollectorTest, FormatDumpBasename);
   FRIEND_TEST(CrashCollectorTest, Initialize);
 
+  // Set maximum enqueued crashes in a crash directory.
+  static const int kMaxCrashDirectorySize;
+
   // For testing, set the directory always returned by
   // GetCreatedCrashDirectoryByEuid.
   void ForceCrashDirectory(const char *forced_directory) {
     forced_crash_directory_ = forced_directory;
   }
 
   FilePath GetCrashDirectoryInfo(uid_t process_euid,
                                  uid_t default_user_id,
                                  gid_t default_user_group,
                                  mode_t *mode,
                                  uid_t *directory_owner,
                                  gid_t *directory_group);
   bool GetUserInfoFromName(const std::string &name,
                            uid_t *uid,
                            gid_t *gid);
   // Determines the crash directory for given eud, and creates the
   // directory if necessary with appropriate permissions.  Returns
   // true whether or not directory needed to be created, false on any
-  // failure.
+  // failure.  If the crash directory is already full, returns false.
   bool GetCreatedCrashDirectoryByEuid(uid_t euid,
                                       FilePath *crash_file_path);
+
+  // Format crash name based on components.
   std::string FormatDumpBasename(const std::string &exec_name,
                                  time_t timestamp,
                                  pid_t pid);
 
+  // Check given crash directory still has remaining capacity for another
+  // crash.
+  bool CheckHasCapacity(const FilePath &crash_directory);
+
   CountCrashFunction count_crash_function_;
   IsFeedbackAllowedFunction is_feedback_allowed_function_;
   SystemLogging *logger_;
   const char *forced_crash_directory_;
 };
 
 #endif  // _CRASH_REPORTER_CRASH_COLLECTOR_H_