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Diffstat (limited to 'security/nss/lib/util/nssilckt.h')
| -rw-r--r-- | security/nss/lib/util/nssilckt.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/security/nss/lib/util/nssilckt.h b/security/nss/lib/util/nssilckt.h new file mode 100644 index 0000000000..417f96f67a --- /dev/null +++ b/security/nss/lib/util/nssilckt.h @@ -0,0 +1,191 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* +** nssilock.h - Instrumented locking functions for NSS +** +** Description: +** nssilock provides instrumentation for locks and monitors in +** the NSS libraries. The instrumentation, when enabled, causes +** each call to the instrumented function to record data about +** the call to an external file. The external file +** subsequently used to extract performance data and other +** statistical information about the operation of locks used in +** the nss library. +** +** To enable compilation with instrumentation, build NSS with +** the compile time switch NEED_NSS_ILOCK defined. +** +** say: "gmake OS_CFLAGS+=-DNEED_NSS_ILOCK" at make time. +** +** At runtime, to enable recording from nssilock, one or more +** environment variables must be set. For each nssILockType to +** be recorded, an environment variable of the form NSS_ILOCK_x +** must be set to 1. For example: +** +** set NSS_ILOCK_Cert=1 +** +** nssilock uses PRLOG is used to record to trace data. The +** PRLogModule name associated with nssilock data is: "nssilock". +** To enable recording of nssilock data you will need to set the +** environment variable NSPR_LOG_MODULES to enable +** recording for the nssilock log module. Similarly, you will +** need to set the environment variable NSPR_LOG_FILE to specify +** the filename to receive the recorded data. See prlog.h for usage. +** Example: +** +** export NSPR_LOG_MODULES=nssilock:6 +** export NSPR_LOG_FILE=xxxLogfile +** +** Operation: +** nssilock wraps calls to NSPR's PZLock and PZMonitor functions +** with similarly named functions: PZ_NewLock(), etc. When NSS is +** built with lock instrumentation enabled, the PZ* functions are +** compiled into NSS; when lock instrumentation is disabled, +** calls to PZ* functions are directly mapped to PR* functions +** and the instrumentation arguments to the PZ* functions are +** compiled away. +** +** +** File Format: +** The format of the external file is implementation +** dependent. Where NSPR's PR_LOG() function is used, the file +** contains data defined for PR_LOG() plus the data written by +** the wrapped function. On some platforms and under some +** circumstances, platform dependent logging or +** instrumentation probes may be used. In any case, the +** relevant data provided by the lock instrumentation is: +** +** lockType, func, address, duration, line, file [heldTime] +** +** where: +** +** lockType: a character representation of nssILockType for the +** call. e.g. ... "cert" +** +** func: the function doing the tracing. e.g. "NewLock" +** +** address: address of the instrumented lock or monitor +** +** duration: is how long was spent in the instrumented function, +** in PRIntervalTime "ticks". +** +** line: the line number within the calling function +** +** file: the file from which the call was made +** +** heldTime: how long the lock/monitor was held. field +** present only for PZ_Unlock() and PZ_ExitMonitor(). +** +** Design Notes: +** The design for lock instrumentation was influenced by the +** need to gather performance data on NSS 3.x. It is intended +** that the effort to modify NSS to use lock instrumentation +** be minimized. Existing calls to locking functions need only +** have their names changed to the instrumentation function +** names. +** +** Private NSS Interface: +** nssilock.h defines a private interface for use by NSS. +** nssilock.h is experimental in nature and is subject to +** change or revocation without notice. ... Don't mess with +** it. +** +*/ + +/* + * $Id: + */ + +#ifndef _NSSILCKT_H_ +#define _NSSILCKT_H_ + +#include "utilrename.h" +#include "prtypes.h" +#include "prmon.h" +#include "prlock.h" +#include "prcvar.h" + +typedef enum { + nssILockArena = 0, + nssILockSession = 1, + nssILockObject = 2, + nssILockRefLock = 3, + nssILockCert = 4, + nssILockCertDB = 5, + nssILockDBM = 6, + nssILockCache = 7, + nssILockSSL = 8, + nssILockList = 9, + nssILockSlot = 10, + nssILockFreelist = 11, + nssILockOID = 12, + nssILockAttribute = 13, + nssILockPK11cxt = 14, /* pk11context */ + nssILockRWLock = 15, + nssILockOther = 16, + nssILockSelfServ = 17, + nssILockKeyDB = 18, + nssILockLast /* don't use this one! */ +} nssILockType; + +/* +** conditionally compile in nssilock features +*/ +#if defined(NEED_NSS_ILOCK) + +/* +** Declare operation type enumerator +** enumerations identify the function being performed +*/ +typedef enum { + FlushTT = 0, + NewLock = 1, + Lock = 2, + Unlock = 3, + DestroyLock = 4, + NewCondVar = 5, + WaitCondVar = 6, + NotifyCondVar = 7, + NotifyAllCondVar = 8, + DestroyCondVar = 9, + NewMonitor = 10, + EnterMonitor = 11, + ExitMonitor = 12, + Notify = 13, + NotifyAll = 14, + Wait = 15, + DestroyMonitor = 16 +} nssILockOp; + +/* +** Declare the trace record +*/ +struct pzTrace_s { + PRUint32 threadID; /* PR_GetThreadID() */ + nssILockOp op; /* operation being performed */ + nssILockType ltype; /* lock type identifier */ + PRIntervalTime callTime; /* time spent in function */ + PRIntervalTime heldTime; /* lock held time, or -1 */ + void *lock; /* address of lock structure */ + PRIntn line; /* line number */ + char file[24]; /* filename */ +}; + +/* +** declare opaque types. See: nssilock.c +*/ +typedef struct pzlock_s PZLock; +typedef struct pzcondvar_s PZCondVar; +typedef struct pzmonitor_s PZMonitor; + +#else /* NEED_NSS_ILOCK */ + +#define PZLock PRLock +#define PZCondVar PRCondVar +#define PZMonitor PRMonitor + +#endif /* NEED_NSS_ILOCK */ + +#endif /* _NSSILCKT_H_ */ |