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https://github.com/google/santa.git
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7f3e4d7468
OSDictionary is not well-suited to our needs and locking is quite expensive.
This commit:
+ Replaces all uses of OSDictionary with a new SantaCache class, which
is a size-limited array hash table with per-bucket locking. It works with
uint64_t keys, which is perfect for our needs.
+ Adds a unit test for SantaCache.
+ Removes SantaCachedDecision and SantaPIDAndPPID, which only existed
because OSDictionary can only store OSObject subclasses.
+ Removes a lot of locking logic from SantaDecisionManager as the
locking is now handled inside SantaCache and is therefore and is
much more granular.
+ Removes the timed cache expiration for ALLOW decisions. This was
originally to ensure executions were logged regularly but as we're
logging all executions nowadays this is longer particularly useful.
SantaCache's configured load factor and hashing function may need tweaking
over-time but this is already a little faster and uses less memory
than what existed before.
64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/// Copyright 2015 Google Inc. All rights reserved.
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Logging definitions, for both kernel and user space.
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///
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#ifndef SANTA__COMMON__LOGGING_H
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#define SANTA__COMMON__LOGGING_H
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#ifdef KERNEL
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#include <IOKit/IOLib.h>
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#ifdef DEBUG
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#define LOGD(...) IOLog("D santa-driver: " __VA_ARGS__); IOLog("\n")
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#else // DEBUG
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#define LOGD(...)
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#endif // DEBUG
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#define LOGI(...) IOLog("I santa-driver: " __VA_ARGS__); IOLog("\n")
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#define LOGW(...) IOLog("W santa-driver: " __VA_ARGS__); IOLog("\n")
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#define LOGE(...) IOLog("E santa-driver: " __VA_ARGS__); IOLog("\n")
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#else // KERNEL
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typedef enum : NSUInteger {
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LOG_LEVEL_ERROR,
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LOG_LEVEL_WARN,
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LOG_LEVEL_INFO,
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LOG_LEVEL_DEBUG
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} LogLevel;
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///
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/// Logging function.
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/// @param level one of the levels defined above
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/// @param destination a FILE, generally stdout/stderr. If the file is closed, the log
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/// will instead be sent to syslog.
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/// @param format the printf style format string
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/// @param ... the arguments to format.
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///
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void logMessage(LogLevel level, FILE *destination, NSString *format, ...)
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__attribute__((format(__NSString__, 3, 4)));
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/// Simple logging macros
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#define LOGD(logFormat, ...) logMessage(LOG_LEVEL_DEBUG, stdout, logFormat, ##__VA_ARGS__)
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#define LOGI(logFormat, ...) logMessage(LOG_LEVEL_INFO, stdout, logFormat, ##__VA_ARGS__)
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#define LOGW(logFormat, ...) logMessage(LOG_LEVEL_WARN, stderr, logFormat, ##__VA_ARGS__)
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#define LOGE(logFormat, ...) logMessage(LOG_LEVEL_ERROR, stderr, logFormat, ##__VA_ARGS__)
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#endif // KERNEL
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#endif // SANTA__COMMON__LOGGING_H
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