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