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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
/*
** File: ntioto.c
** Description:
** This test, ntioto.c, was designed to reproduce a bug reported by NES
** on WindowsNT (fibers implementation). NSPR was asserting in ntio.c
** after PR_AcceptRead() had timed out. I/O performed subsequent to the
** call to PR_AcceptRead() could complete on a CPU other than the one
** on which it was started. The assert in ntio.c detected this, then
** asserted.
**
** Design:
** This test will fail with an assert in ntio.c if the problem it was
** designed to catch occurs. It returns 0 otherwise.
**
** The main() thread initializes and tears things down. A file is
** opened for writing; this file will be written to by AcceptThread()
** and JitterThread(). Main() creates a socket for reading, listens
** and binds the socket.
**
** ConnectThread() connects to the socket created by main, then polls
** the "state" variable. When state is AllDone, ConnectThread() exits.
**
** AcceptThread() calls PR_AcceptRead() on the socket. He fully expects
** it to time out. After the timeout, AccpetThread() interacts with
** JitterThread() via a common condition variable and the state
** variable. The two threads ping-pong back and forth, each thread
** writes the the file opened by main. This should provoke the
** condition reported by NES (if we didn't fix it).
**
** The failure is not solid. It may fail within a few ping-pongs between
** AcceptThread() and JitterThread() or may take a while. The default
** iteration count, jitter, is set by DEFAULT_JITTER. This may be
** modified at the command line with the -j option.
**
*/
#include <plgetopt.h>
#include <nspr.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*
** Test harness infrastructure
*/
PRLogModuleInfo *lm;
PRLogModuleLevel msgLevel = PR_LOG_NONE;
PRIntn debug = 0;
PRIntn verbose = 0;
PRUint32 failed_already = 0;
/* end Test harness infrastructure */
/* JITTER_DEFAULT: the number of times AcceptThread() and JitterThread() ping-pong */
#define JITTER_DEFAULT 100000
#define BASE_PORT 9867
PRIntervalTime timeout;
PRNetAddr listenAddr;
PRFileDesc *listenSock;
PRLock *ml;
PRCondVar *cv;
volatile enum {
RunJitter,
RunAcceptRead,
AllDone
} state = RunAcceptRead;
PRFileDesc *file1;
PRIntn iCounter = 0;
PRIntn jitter = JITTER_DEFAULT;
PRBool resume = PR_FALSE;
/*
** Emit help text for this test
*/
static void Help( void )
{
printf("Template: Help(): display your help message(s) here");
exit(1);
} /* end Help() */
/*
** static computation of PR_AcceptRead() buffer size.
*/
#define ACCEPT_READ_DATASIZE 10
#define ACCEPT_READ_BUFSIZE (PR_ACCEPT_READ_BUF_OVERHEAD + ACCEPT_READ_DATASIZE)
static void AcceptThread(void *arg)
{
PRIntn bytesRead;
char dataBuf[ACCEPT_READ_BUFSIZE];
PRFileDesc *arSock;
PRNetAddr *arAddr;
bytesRead = PR_AcceptRead( listenSock,
&arSock,
&arAddr,
dataBuf,
ACCEPT_READ_DATASIZE,
PR_SecondsToInterval(1));
if ( bytesRead == -1 && PR_GetError() == PR_IO_TIMEOUT_ERROR ) {
if ( debug ) printf("AcceptRead timed out\n");
} else {
if ( debug ) printf("Oops! read: %d, error: %d\n", bytesRead, PR_GetError());
}
while( state != AllDone ) {
PR_Lock( ml );
while( state != RunAcceptRead )
PR_WaitCondVar( cv, PR_INTERVAL_NO_TIMEOUT );
if ( ++iCounter >= jitter )
state = AllDone;
else
state = RunJitter;
if ( verbose ) printf(".");
PR_NotifyCondVar( cv );
PR_Unlock( ml );
PR_Write( file1, ".", 1 );
}
return;
} /* end AcceptThread() */
static void JitterThread(void *arg)
{
while( state != AllDone ) {
PR_Lock( ml );
while( state != RunJitter && state != AllDone )
PR_WaitCondVar( cv, PR_INTERVAL_NO_TIMEOUT );
if ( state != AllDone)
state = RunAcceptRead;
if ( verbose ) printf("+");
PR_NotifyCondVar( cv );
PR_Unlock( ml );
PR_Write( file1, "+", 1 );
}
return;
} /* end Goofy() */
static void ConnectThread( void *arg )
{
PRStatus rv;
PRFileDesc *clientSock;
PRNetAddr serverAddress;
clientSock = PR_NewTCPSocket();
PR_ASSERT(clientSock);
if ( resume ) {
if ( debug ) printf("pausing 3 seconds before connect\n");
PR_Sleep( PR_SecondsToInterval(3));
}
memset(&serverAddress, 0, sizeof(serverAddress));
rv = PR_InitializeNetAddr(PR_IpAddrLoopback, BASE_PORT, &serverAddress);
PR_ASSERT( PR_SUCCESS == rv );
rv = PR_Connect( clientSock,
&serverAddress,
PR_SecondsToInterval(1));
PR_ASSERT( PR_SUCCESS == rv );
/* that's all we do. ... Wait for the acceptread() to timeout */
while( state != AllDone )
PR_Sleep( PR_SecondsToInterval(1));
return;
} /* end ConnectThread() */
int main(int argc, char **argv)
{
PRThread *tJitter;
PRThread *tAccept;
PRThread *tConnect;
PRStatus rv;
/* This test if valid for WinNT only! */
#if !defined(WINNT)
return 0;
#endif
{
/*
** Get command line options
*/
PLOptStatus os;
PLOptState *opt = PL_CreateOptState(argc, argv, "hdrvj:");
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
{
if (PL_OPT_BAD == os) continue;
switch (opt->option)
{
case 'd': /* debug */
debug = 1;
msgLevel = PR_LOG_ERROR;
break;
case 'v': /* verbose mode */
verbose = 1;
msgLevel = PR_LOG_DEBUG;
break;
case 'j':
jitter = atoi(opt->value);
if ( jitter == 0)
jitter = JITTER_DEFAULT;
break;
case 'r':
resume = PR_TRUE;
break;
case 'h': /* help message */
Help();
break;
default:
break;
}
}
PL_DestroyOptState(opt);
}
lm = PR_NewLogModule("Test"); /* Initialize logging */
/* set concurrency */
PR_SetConcurrency( 4 );
/* setup thread synchronization mechanics */
ml = PR_NewLock();
cv = PR_NewCondVar( ml );
/* setup a tcp socket */
memset(&listenAddr, 0, sizeof(listenAddr));
rv = PR_InitializeNetAddr(PR_IpAddrAny, BASE_PORT, &listenAddr);
PR_ASSERT( PR_SUCCESS == rv );
listenSock = PR_NewTCPSocket();
PR_ASSERT( listenSock );
rv = PR_Bind( listenSock, &listenAddr);
PR_ASSERT( PR_SUCCESS == rv );
rv = PR_Listen( listenSock, 5 );
PR_ASSERT( PR_SUCCESS == rv );
/* open a file for writing, provoke bug */
file1 = PR_Open("xxxTestFile", PR_CREATE_FILE | PR_RDWR, 666);
/* create Connect thread */
tConnect = PR_CreateThread(
PR_USER_THREAD, ConnectThread, NULL,
PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
PR_JOINABLE_THREAD, 0 );
PR_ASSERT( tConnect );
/* create jitter off thread */
tJitter = PR_CreateThread(
PR_USER_THREAD, JitterThread, NULL,
PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
PR_JOINABLE_THREAD, 0 );
PR_ASSERT( tJitter );
/* create acceptread thread */
tAccept = PR_CreateThread(
PR_USER_THREAD, AcceptThread, NULL,
PR_PRIORITY_NORMAL, PR_LOCAL_THREAD,
PR_JOINABLE_THREAD, 0 );
PR_ASSERT( tAccept );
/* wait for all threads to quit, then terminate gracefully */
PR_JoinThread( tConnect );
PR_JoinThread( tAccept );
PR_JoinThread( tJitter );
PR_Close( listenSock );
PR_DestroyCondVar(cv);
PR_DestroyLock(ml);
PR_Close( file1 );
PR_Delete( "xxxTestFile");
/* test return and exit */
if (debug) printf("%s\n", (failed_already)? "FAIL" : "PASS");
return( (failed_already == PR_TRUE )? 1 : 0 );
} /* main() */
/* end ntioto.c */
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