mirror of
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289 lines
8.1 KiB
C
289 lines
8.1 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 _NSSILOCK_H_
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#define _NSSILOCK_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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#include "nssilckt.h"
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PR_BEGIN_EXTERN_C
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#if defined(NEED_NSS_ILOCK)
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#define PZ_NewLock(t) pz_NewLock((t),__FILE__,__LINE__)
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extern PZLock *
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pz_NewLock(
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nssILockType ltype,
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char *file,
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PRIntn line
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);
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#define PZ_Lock(k) pz_Lock((k),__FILE__,__LINE__)
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extern void
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pz_Lock(
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PZLock *lock,
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char *file,
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PRIntn line
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);
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#define PZ_Unlock(k) pz_Unlock((k),__FILE__,__LINE__)
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extern PRStatus
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pz_Unlock(
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PZLock *lock,
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char *file,
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PRIntn line
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);
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#define PZ_DestroyLock(k) pz_DestroyLock((k),__FILE__,__LINE__)
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extern void
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pz_DestroyLock(
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PZLock *lock,
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char *file,
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PRIntn line
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);
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#define PZ_NewCondVar(l) pz_NewCondVar((l),__FILE__,__LINE__)
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extern PZCondVar *
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pz_NewCondVar(
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PZLock *lock,
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char *file,
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PRIntn line
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);
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#define PZ_DestroyCondVar(v) pz_DestroyCondVar((v),__FILE__,__LINE__)
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extern void
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pz_DestroyCondVar(
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PZCondVar *cvar,
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char *file,
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PRIntn line
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);
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#define PZ_WaitCondVar(v,t) pz_WaitCondVar((v),(t),__FILE__,__LINE__)
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extern PRStatus
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pz_WaitCondVar(
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PZCondVar *cvar,
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PRIntervalTime timeout,
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char *file,
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PRIntn line
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);
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#define PZ_NotifyCondVar(v) pz_NotifyCondVar((v),__FILE__,__LINE__)
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extern PRStatus
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pz_NotifyCondVar(
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PZCondVar *cvar,
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char *file,
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PRIntn line
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);
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#define PZ_NotifyAllCondVar(v) pz_NotifyAllCondVar((v),__FILE__,__LINE__)
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extern PRStatus
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pz_NotifyAllCondVar(
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PZCondVar *cvar,
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char *file,
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PRIntn line
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);
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#define PZ_NewMonitor(t) pz_NewMonitor((t),__FILE__,__LINE__)
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extern PZMonitor *
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pz_NewMonitor(
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nssILockType ltype,
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char *file,
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PRIntn line
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);
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#define PZ_DestroyMonitor(m) pz_DestroyMonitor((m),__FILE__,__LINE__)
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extern void
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pz_DestroyMonitor(
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PZMonitor *mon,
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char *file,
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PRIntn line
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);
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#define PZ_EnterMonitor(m) pz_EnterMonitor((m),__FILE__,__LINE__)
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extern void
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pz_EnterMonitor(
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PZMonitor *mon,
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char *file,
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PRIntn line
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);
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#define PZ_ExitMonitor(m) pz_ExitMonitor((m),__FILE__,__LINE__)
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extern PRStatus
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pz_ExitMonitor(
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PZMonitor *mon,
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char *file,
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PRIntn line
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);
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#define PZ_InMonitor(m) (PZ_GetMonitorEntryCount(m) > 0 )
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#define PZ_GetMonitorEntryCount(m) pz_GetMonitorEntryCount((m),__FILE__,__LINE__)
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extern PRIntn
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pz_GetMonitorEntryCount(
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PZMonitor *mon,
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char *file,
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PRIntn line
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);
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#define PZ_Wait(m,i) pz_Wait((m),((i)),__FILE__,__LINE__)
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extern PRStatus
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pz_Wait(
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PZMonitor *mon,
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PRIntervalTime ticks,
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char *file,
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PRIntn line
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);
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#define PZ_Notify(m) pz_Notify((m),__FILE__,__LINE__)
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extern PRStatus
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pz_Notify(
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PZMonitor *mon,
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char *file,
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PRIntn line
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);
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#define PZ_NotifyAll(m) pz_NotifyAll((m),__FILE__,__LINE__)
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extern PRStatus
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pz_NotifyAll(
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PZMonitor *mon,
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char *file,
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PRIntn line
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);
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#define PZ_TraceFlush() pz_TraceFlush()
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extern void pz_TraceFlush( void );
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#else /* NEED_NSS_ILOCK */
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#define PZ_NewLock(t) PR_NewLock()
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#define PZ_DestroyLock(k) PR_DestroyLock((k))
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#define PZ_Lock(k) PR_Lock((k))
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#define PZ_Unlock(k) PR_Unlock((k))
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#define PZ_NewCondVar(l) PR_NewCondVar((l))
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#define PZ_DestroyCondVar(v) PR_DestroyCondVar((v))
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#define PZ_WaitCondVar(v,t) PR_WaitCondVar((v),(t))
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#define PZ_NotifyCondVar(v) PR_NotifyCondVar((v))
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#define PZ_NotifyAllCondVar(v) PR_NotifyAllCondVar((v))
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#define PZ_NewMonitor(t) PR_NewMonitor()
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#define PZ_DestroyMonitor(m) PR_DestroyMonitor((m))
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#define PZ_EnterMonitor(m) PR_EnterMonitor((m))
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#define PZ_ExitMonitor(m) PR_ExitMonitor((m))
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#define PZ_InMonitor(m) PR_InMonitor((m))
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#define PZ_Wait(m,t) PR_Wait(((m)),((t)))
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#define PZ_Notify(m) PR_Notify((m))
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#define PZ_NotifyAll(m) PR_Notify((m))
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#define PZ_TraceFlush() /* nothing */
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#endif /* NEED_NSS_ILOCK */
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PR_END_EXTERN_C
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#endif /* _NSSILOCK_H_ */
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