mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-14 03:30:17 +01:00
499 lines
12 KiB
C
499 lines
12 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.c - NSS lock instrumentation wrapper functions
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*
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* NOTE - These are not public interfaces
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*
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* Implementation Notes:
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* I've tried to make the instrumentation relatively non-intrusive.
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* To do this, I have used a single PR_LOG() call in each
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* instrumented function. There's room for improvement.
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*
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*
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*/
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#include "prinit.h"
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#include "prerror.h"
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#include "prlock.h"
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#include "prmem.h"
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#include "prenv.h"
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#include "prcvar.h"
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#include "prio.h"
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#if defined(NEED_NSS_ILOCK)
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#include "prlog.h"
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#include "nssilock.h"
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/*
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** Declare the instrumented PZLock
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*/
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struct pzlock_s {
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PRLock *lock; /* the PZLock to be instrumented */
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PRIntervalTime time; /* timestamp when the lock was aquired */
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nssILockType ltype;
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};
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/*
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** Declare the instrumented PZMonitor
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*/
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struct pzmonitor_s {
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PRMonitor *mon; /* the PZMonitor to be instrumented */
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PRIntervalTime time; /* timestamp when the monitor was aquired */
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nssILockType ltype;
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};
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/*
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** Declare the instrumented PZCondVar
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*/
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struct pzcondvar_s {
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PRCondVar *cvar; /* the PZCondVar to be instrumented */
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nssILockType ltype;
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};
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/*
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** Define a CallOnce type to ensure serialized self-initialization
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*/
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static PRCallOnceType coNssILock; /* CallOnce type */
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static PRIntn nssILockInitialized; /* initialization done when 1 */
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static PRLogModuleInfo *nssILog; /* Log instrumentation to this handle */
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#define NUM_TT_ENTRIES 6000000
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static PRInt32 traceIndex = -1; /* index into trace table */
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static struct pzTrace_s *tt; /* pointer to trace table */
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static PRInt32 ttBufSize = (NUM_TT_ENTRIES * sizeof(struct pzTrace_s ));
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static PRCondVar *ttCVar;
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static PRLock *ttLock;
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static PRFileDesc *ttfd; /* trace table file */
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/*
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** Vtrace() -- Trace events, write events to external media
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**
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** Vtrace() records traced events in an in-memory trace table
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** when the trace table fills, Vtrace writes the entire table
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** to a file.
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**
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** data can be lost!
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**
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*/
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static void Vtrace(
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nssILockOp op,
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nssILockType ltype,
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PRIntervalTime callTime,
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PRIntervalTime heldTime,
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void *lock,
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PRIntn line,
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char *file
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) {
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PRInt32 idx;
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struct pzTrace_s *tp;
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RetryTrace:
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idx = PR_ATOMIC_INCREMENT( &traceIndex );
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while( NUM_TT_ENTRIES <= idx || op == FlushTT ) {
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if( NUM_TT_ENTRIES == idx || op == FlushTT ) {
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int writeSize = idx * sizeof(struct pzTrace_s);
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PR_Lock(ttLock);
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PR_Write( ttfd, tt, writeSize );
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traceIndex = -1;
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PR_NotifyAllCondVar( ttCVar );
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PR_Unlock(ttLock);
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goto RetryTrace;
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} else {
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PR_Lock(ttLock);
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while( NUM_TT_ENTRIES < idx )
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PR_WaitCondVar(ttCVar, PR_INTERVAL_NO_WAIT);
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PR_Unlock(ttLock);
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goto RetryTrace;
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}
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} /* end while() */
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/* create the trace entry */
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tp = tt + idx;
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tp->threadID = PR_GetThreadID(PR_GetCurrentThread());
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tp->op = op;
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tp->ltype = ltype;
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tp->callTime = callTime;
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tp->heldTime = heldTime;
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tp->lock = lock;
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tp ->line = line;
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strcpy(tp->file, file );
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return;
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} /* --- end Vtrace() --- */
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/*
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** pz_TraceFlush() -- Force trace table write to file
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**
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*/
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extern void pz_TraceFlush( void )
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{
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Vtrace( FlushTT, nssILockSelfServ, 0, 0, NULL, 0, "" );
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return;
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} /* --- end pz_TraceFlush() --- */
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/*
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** nssILockInit() -- Initialization for nssilock
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**
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** This function is called from the CallOnce mechanism.
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*/
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static PRStatus
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nssILockInit( void )
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{
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int i;
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nssILockInitialized = 1;
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/* new log module */
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nssILog = PR_NewLogModule("nssilock");
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if ( NULL == nssILog ) {
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return(PR_FAILURE);
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}
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tt = PR_Calloc( NUM_TT_ENTRIES, sizeof(struct pzTrace_s));
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if (NULL == tt ) {
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fprintf(stderr, "nssilock: can't allocate trace table\n");
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exit(1);
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}
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ttfd = PR_Open( "xxxTTLog", PR_CREATE_FILE | PR_WRONLY, 0666 );
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if ( NULL == ttfd ) {
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fprintf( stderr, "Oh Drat! Can't open 'xxxTTLog'\n");
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exit(1);
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}
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ttLock = PR_NewLock();
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ttCVar = PR_NewCondVar(ttLock);
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return(PR_SUCCESS);
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} /* --- end nssILockInit() --- */
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extern PZLock * 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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PRStatus rc;
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PZLock *lock;
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/* Self Initialize the nssILock feature */
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if (!nssILockInitialized) {
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rc = PR_CallOnce( &coNssILock, nssILockInit );
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if ( PR_FAILURE == rc ) {
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PR_SetError( PR_UNKNOWN_ERROR, 0 );
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return( NULL );
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}
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}
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lock = PR_NEWZAP( PZLock );
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if ( NULL != lock ) {
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lock->ltype = ltype;
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lock->lock = PR_NewLock();
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if ( NULL == lock->lock ) {
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PR_DELETE( lock );
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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} else {
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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Vtrace( NewLock, ltype, 0, 0, lock, line, file );
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return(lock);
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} /* --- end pz_NewLock() --- */
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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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{
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PRIntervalTime callTime;
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callTime = PR_IntervalNow();
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PR_Lock( lock->lock );
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lock->time = PR_IntervalNow();
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callTime = lock->time - callTime;
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Vtrace( Lock, lock->ltype, callTime, 0, lock, line, file );
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return;
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} /* --- end pz_Lock() --- */
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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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{
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PRStatus rc;
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PRIntervalTime callTime, now, heldTime;
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callTime = PR_IntervalNow();
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rc = PR_Unlock( lock->lock );
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now = PR_IntervalNow();
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callTime = now - callTime;
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heldTime = now - lock->time;
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Vtrace( Unlock, lock->ltype, callTime, heldTime, lock, line, file );
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return( rc );
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} /* --- end pz_Unlock() --- */
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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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{
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Vtrace( DestroyLock, lock->ltype, 0, 0, lock, line, file );
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PR_DestroyLock( lock->lock );
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PR_DELETE( lock );
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return;
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} /* --- end pz_DestroyLock() --- */
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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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{
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PZCondVar *cvar;
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cvar = PR_NEWZAP( PZCondVar );
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if ( NULL == cvar ) {
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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} else {
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cvar->ltype = lock->ltype;
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cvar->cvar = PR_NewCondVar( lock->lock );
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if ( NULL == cvar->cvar ) {
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PR_DELETE( cvar );
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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}
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Vtrace( NewCondVar, lock->ltype, 0, 0, cvar, line, file );
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return( cvar );
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} /* --- end pz_NewCondVar() --- */
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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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{
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Vtrace( DestroyCondVar, cvar->ltype, 0, 0, cvar, line, file );
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PR_DestroyCondVar( cvar->cvar );
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PR_DELETE( cvar );
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} /* --- end pz_DestroyCondVar() --- */
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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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{
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PRStatus rc;
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PRIntervalTime callTime;
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callTime = PR_IntervalNow();
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rc = PR_WaitCondVar( cvar->cvar, timeout );
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callTime = PR_IntervalNow() - callTime;
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Vtrace( WaitCondVar, cvar->ltype, callTime, 0, cvar, line, file );
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return(rc);
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} /* --- end pz_WaitCondVar() --- */
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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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{
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PRStatus rc;
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rc = PR_NotifyCondVar( cvar->cvar );
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Vtrace( NotifyCondVar, cvar->ltype, 0, 0, cvar, line, file );
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return(rc);
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} /* --- end pz_NotifyCondVar() --- */
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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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{
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PRStatus rc;
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rc = PR_NotifyAllCondVar( cvar->cvar );
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Vtrace( NotifyAllCondVar, cvar->ltype, 0, 0, cvar, line, file );
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return(rc);
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} /* --- end pz_NotifyAllCondVar() --- */
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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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{
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PRStatus rc;
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PZMonitor *mon;
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/* Self Initialize the nssILock feature */
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if (!nssILockInitialized) {
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rc = PR_CallOnce( &coNssILock, nssILockInit );
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if ( PR_FAILURE == rc ) {
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PR_SetError( PR_UNKNOWN_ERROR, 0 );
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return( NULL );
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}
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}
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mon = PR_NEWZAP( PZMonitor );
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if ( NULL != mon ) {
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mon->ltype = ltype;
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mon->mon = PR_NewMonitor();
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if ( NULL == mon->mon ) {
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PR_DELETE( mon );
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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} else {
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PORT_SetError(SEC_ERROR_NO_MEMORY);
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}
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Vtrace( NewMonitor, ltype, 0, 0, mon, line, file );
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return(mon);
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} /* --- end pz_NewMonitor() --- */
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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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{
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Vtrace( DestroyMonitor, mon->ltype, 0, 0, mon, line, file );
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PR_DestroyMonitor( mon->mon );
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PR_DELETE( mon );
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return;
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} /* --- end pz_DestroyMonitor() --- */
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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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{
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PRIntervalTime callTime, now;
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callTime = PR_IntervalNow();
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PR_EnterMonitor( mon->mon );
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now = PR_IntervalNow();
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callTime = now - callTime;
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if ( PR_GetMonitorEntryCount(mon->mon) == 1 ) {
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mon->time = now;
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}
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Vtrace( EnterMonitor, mon->ltype, callTime, 0, mon, line, file );
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return;
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} /* --- end pz_EnterMonitor() --- */
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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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{
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PRStatus rc;
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PRIntervalTime callTime, now, heldTime;
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PRIntn mec = PR_GetMonitorEntryCount( mon->mon );
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heldTime = (PRIntervalTime)-1;
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callTime = PR_IntervalNow();
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rc = PR_ExitMonitor( mon->mon );
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now = PR_IntervalNow();
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callTime = now - callTime;
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if ( mec == 1 )
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heldTime = now - mon->time;
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Vtrace( ExitMonitor, mon->ltype, callTime, heldTime, mon, line, file );
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return( rc );
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} /* --- end pz_ExitMonitor() --- */
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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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{
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return( PR_GetMonitorEntryCount(mon->mon));
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} /* --- end pz_GetMonitorEntryCount() --- */
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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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{
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PRStatus rc;
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PRIntervalTime callTime;
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callTime = PR_IntervalNow();
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rc = PR_Wait( mon->mon, ticks );
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callTime = PR_IntervalNow() - callTime;
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Vtrace( Wait, mon->ltype, callTime, 0, mon, line, file );
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return( rc );
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} /* --- end pz_Wait() --- */
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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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{
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PRStatus rc;
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PRIntervalTime callTime;
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callTime = PR_IntervalNow();
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rc = PR_Notify( mon->mon );
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callTime = PR_IntervalNow() - callTime;
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Vtrace( Notify, mon->ltype, callTime, 0, mon, line, file );
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return( rc );
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} /* --- end pz_Notify() --- */
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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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{
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PRStatus rc;
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PRIntervalTime callTime;
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callTime = PR_IntervalNow();
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rc = PR_NotifyAll( mon->mon );
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callTime = PR_IntervalNow() - callTime;
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Vtrace( NotifyAll, mon->ltype, callTime, 0, mon, line, file );
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return( rc );
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} /* --- end pz_NotifyAll() --- */
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#endif /* NEED_NSS_ILOCK */
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/* --- end nssilock.c --------------------------------- */
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