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224 lines
7.4 KiB
C
224 lines
7.4 KiB
C
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape security libraries.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1994-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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** nssilock.h - Instrumented locking functions for NSS
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**
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** Description:
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** nssilock provides instrumentation for locks and monitors in
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** the NSS libraries. The instrumentation, when enabled, causes
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** each call to the instrumented function to record data about
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** the call to an external file. The external file
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** subsequently used to extract performance data and other
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** statistical information about the operation of locks used in
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** the nss library.
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**
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** To enable compilation with instrumentation, build NSS with
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** the compile time switch NEED_NSS_ILOCK defined.
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**
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** say: "gmake OS_CFLAGS+=-DNEED_NSS_ILOCK" at make time.
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**
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** At runtime, to enable recording from nssilock, one or more
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** environment variables must be set. For each nssILockType to
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** be recorded, an environment variable of the form NSS_ILOCK_x
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** must be set to 1. For example:
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**
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** set NSS_ILOCK_Cert=1
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**
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** nssilock uses PRLOG is used to record to trace data. The
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** PRLogModule name associated with nssilock data is: "nssilock".
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** To enable recording of nssilock data you will need to set the
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** environment variable NSPR_LOG_MODULES to enable
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** recording for the nssilock log module. Similarly, you will
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** need to set the environment variable NSPR_LOG_FILE to specify
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** the filename to receive the recorded data. See prlog.h for usage.
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** Example:
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**
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** export NSPR_LOG_MODULES=nssilock:6
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** export NSPR_LOG_FILE=xxxLogfile
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**
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** Operation:
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** nssilock wraps calls to NSPR's PZLock and PZMonitor functions
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** with similarly named functions: PZ_NewLock(), etc. When NSS is
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** built with lock instrumentation enabled, the PZ* functions are
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** compiled into NSS; when lock instrumentation is disabled,
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** calls to PZ* functions are directly mapped to PR* functions
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** and the instrumentation arguments to the PZ* functions are
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** compiled away.
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**
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**
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** File Format:
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** The format of the external file is implementation
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** dependent. Where NSPR's PR_LOG() function is used, the file
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** contains data defined for PR_LOG() plus the data written by
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** the wrapped function. On some platforms and under some
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** circumstances, platform dependent logging or
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** instrumentation probes may be used. In any case, the
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** relevant data provided by the lock instrumentation is:
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**
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** lockType, func, address, duration, line, file [heldTime]
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**
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** where:
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**
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** lockType: a character representation of nssILockType for the
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** call. e.g. ... "cert"
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**
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** func: the function doing the tracing. e.g. "NewLock"
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**
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** address: address of the instrumented lock or monitor
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**
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** duration: is how long was spent in the instrumented function,
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** in PRIntervalTime "ticks".
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**
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** line: the line number within the calling function
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**
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** file: the file from which the call was made
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**
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** heldTime: how long the lock/monitor was held. field
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** present only for PZ_Unlock() and PZ_ExitMonitor().
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**
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** Design Notes:
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** The design for lock instrumentation was influenced by the
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** need to gather performance data on NSS 3.x. It is intended
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** that the effort to modify NSS to use lock instrumentation
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** be minimized. Existing calls to locking functions need only
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** have their names changed to the instrumentation function
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** names.
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**
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** Private NSS Interface:
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** nssilock.h defines a private interface for use by NSS.
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** nssilock.h is experimental in nature and is subject to
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** change or revocation without notice. ... Don't mess with
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** it.
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**
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*/
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/*
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* $Id:
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*/
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#ifndef _NSSILCKT_H_
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#define _NSSILCKT_H_
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#include "utilrename.h"
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#include "prtypes.h"
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#include "prmon.h"
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#include "prlock.h"
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#include "prcvar.h"
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typedef enum {
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nssILockArena = 0,
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nssILockSession = 1,
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nssILockObject = 2,
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nssILockRefLock = 3,
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nssILockCert = 4,
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nssILockCertDB = 5,
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nssILockDBM = 6,
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nssILockCache = 7,
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nssILockSSL = 8,
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nssILockList = 9,
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nssILockSlot = 10,
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nssILockFreelist = 11,
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nssILockOID = 12,
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nssILockAttribute = 13,
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nssILockPK11cxt = 14, /* pk11context */
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nssILockRWLock = 15,
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nssILockOther = 16,
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nssILockSelfServ = 17,
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nssILockKeyDB = 18,
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nssILockLast /* don't use this one! */
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} nssILockType;
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/*
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** conditionally compile in nssilock features
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*/
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#if defined(NEED_NSS_ILOCK)
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/*
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** Declare operation type enumerator
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** enumerations identify the function being performed
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*/
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typedef enum {
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FlushTT = 0,
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NewLock = 1,
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Lock = 2,
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Unlock = 3,
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DestroyLock = 4,
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NewCondVar = 5,
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WaitCondVar = 6,
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NotifyCondVar = 7,
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NotifyAllCondVar = 8,
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DestroyCondVar = 9,
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NewMonitor = 10,
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EnterMonitor = 11,
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ExitMonitor = 12,
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Notify = 13,
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NotifyAll = 14,
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Wait = 15,
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DestroyMonitor = 16
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} nssILockOp;
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/*
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** Declare the trace record
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*/
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struct pzTrace_s {
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PRUint32 threadID; /* PR_GetThreadID() */
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nssILockOp op; /* operation being performed */
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nssILockType ltype; /* lock type identifier */
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PRIntervalTime callTime; /* time spent in function */
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PRIntervalTime heldTime; /* lock held time, or -1 */
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void *lock; /* address of lock structure */
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PRIntn line; /* line number */
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char file[24]; /* filename */
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};
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/*
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** declare opaque types. See: nssilock.c
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*/
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typedef struct pzlock_s PZLock;
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typedef struct pzcondvar_s PZCondVar;
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typedef struct pzmonitor_s PZMonitor;
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#else /* NEED_NSS_ILOCK */
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#define PZLock PRLock
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#define PZCondVar PRCondVar
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#define PZMonitor PRMonitor
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#endif /* NEED_NSS_ILOCK */
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#endif /* _NSSILCKT_H_ */
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