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https://gitlab.com/libvirt/libvirt.git
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443 lines
10 KiB
C
443 lines
10 KiB
C
/*
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* testutils.c: basic test utils
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*
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* Copyright (C) 2005-2007 Red Hat, Inc.
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*
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* See COPYING.LIB for the License of this software
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*
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* Karel Zak <kzak@redhat.com>
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*
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* $Id$
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifndef WIN32
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#include <sys/wait.h>
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#endif
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <limits.h>
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#include "testutils.h"
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#include "internal.h"
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#include "memory.h"
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#include "util.h"
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#if TEST_OOM_TRACE
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#include <execinfo.h>
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#endif
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#ifdef HAVE_PATHS_H
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#include <paths.h>
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#endif
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#ifndef _PATH_DEVNULL
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#define _PATH_DEVNULL "/dev/null"
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#endif
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#define GETTIMEOFDAY(T) gettimeofday(T, NULL)
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#define DIFF_MSEC(T, U) \
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((((int) ((T)->tv_sec - (U)->tv_sec)) * 1000000.0 + \
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((int) ((T)->tv_usec - (U)->tv_usec))) / 1000.0)
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static unsigned int testOOM = 0;
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static unsigned int testDebug = 0;
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static unsigned int testCounter = 0;
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double
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virtTestCountAverage(double *items, int nitems)
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{
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long double sum = 0;
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int i;
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for (i=1; i < nitems; i++)
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sum += items[i];
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return (double) (sum / nitems);
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}
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/*
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* Runs test and count average time (if the nloops is grater than 1)
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*
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* returns: -1 = error, 0 = success
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*/
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int
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virtTestRun(const char *title, int nloops, int (*body)(const void *data), const void *data)
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{
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int i, ret = 0;
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double *ts = NULL;
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testCounter++;
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if (testOOM < 2) {
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fprintf(stderr, "%2d) %-65s ... ", testCounter, title);
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fflush(stderr);
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}
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if (nloops > 1 && (ts = calloc(nloops,
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sizeof(double)))==NULL)
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return -1;
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for (i=0; i < nloops; i++) {
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struct timeval before, after;
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if (ts)
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GETTIMEOFDAY(&before);
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if ((ret = body(data)) != 0)
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break;
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if (ts) {
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GETTIMEOFDAY(&after);
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ts[i] = DIFF_MSEC(&after, &before);
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}
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}
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if (testOOM < 2) {
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if (ret == 0 && ts)
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fprintf(stderr, "OK [%.5f ms]\n",
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virtTestCountAverage(ts, nloops));
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else if (ret == 0)
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fprintf(stderr, "OK\n");
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else
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fprintf(stderr, "FAILED\n");
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}
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free(ts);
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return ret;
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}
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int virtTestLoadFile(const char *name,
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char **buf,
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int buflen) {
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FILE *fp = fopen(name, "r");
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struct stat st;
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if (!fp)
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return -1;
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if (fstat(fileno(fp), &st) < 0) {
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fclose(fp);
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return -1;
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}
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if (st.st_size > (buflen-1)) {
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fclose(fp);
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return -1;
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}
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if (st.st_size) {
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if (fread(*buf, st.st_size, 1, fp) != 1) {
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fclose(fp);
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return -1;
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}
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}
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(*buf)[st.st_size] = '\0';
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fclose(fp);
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return st.st_size;
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}
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#ifndef WIN32
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static
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void virtTestCaptureProgramExecChild(const char *const argv[],
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int pipefd) {
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int i;
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int open_max;
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int stdinfd = -1;
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int stderrfd = -1;
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const char *const env[] = {
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"LANG=C",
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NULL
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};
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if ((stdinfd = open(_PATH_DEVNULL, O_RDONLY)) < 0)
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goto cleanup;
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if ((stderrfd = open(_PATH_DEVNULL, O_WRONLY)) < 0)
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goto cleanup;
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open_max = sysconf (_SC_OPEN_MAX);
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for (i = 0; i < open_max; i++) {
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if (i != stdinfd &&
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i != stderrfd &&
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i != pipefd)
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close(i);
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}
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if (dup2(stdinfd, STDIN_FILENO) != STDIN_FILENO)
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goto cleanup;
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if (dup2(pipefd, STDOUT_FILENO) != STDOUT_FILENO)
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goto cleanup;
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if (dup2(stderrfd, STDERR_FILENO) != STDERR_FILENO)
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goto cleanup;
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/* SUS is crazy here, hence the cast */
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execve(argv[0], (char *const*)argv, (char *const*)env);
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cleanup:
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if (stdinfd != -1)
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close(stdinfd);
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if (stderrfd != -1)
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close(stderrfd);
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}
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int virtTestCaptureProgramOutput(const char *const argv[],
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char **buf,
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int buflen) {
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int pipefd[2];
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if (pipe(pipefd) < 0)
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return -1;
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int pid = fork();
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switch (pid) {
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case 0:
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close(pipefd[0]);
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virtTestCaptureProgramExecChild(argv, pipefd[1]);
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close(pipefd[1]);
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_exit(1);
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case -1:
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return -1;
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default:
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{
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int got = 0;
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int ret = -1;
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int want = buflen-1;
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close(pipefd[1]);
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while (want) {
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if ((ret = read(pipefd[0], (*buf)+got, want)) <= 0)
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break;
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got += ret;
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want -= ret;
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}
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close(pipefd[0]);
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if (!ret)
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(*buf)[got] = '\0';
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waitpid(pid, NULL, 0);
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return ret;
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}
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}
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}
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#endif /* !WIN32 */
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/**
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* @param stream: output stream write to differences to
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* @param expect: expected output text
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* @param actual: actual output text
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*
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* Display expected and actual output text, trimmed to
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* first and last characters at which differences occur
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*/
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int virtTestDifference(FILE *stream,
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const char *expect,
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const char *actual)
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{
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const char *expectStart = expect;
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const char *expectEnd = expect + (strlen(expect)-1);
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const char *actualStart = actual;
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const char *actualEnd = actual + (strlen(actual)-1);
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if (!testDebug)
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return 0;
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if (testDebug < 2) {
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/* Skip to first character where they differ */
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while (*expectStart && *actualStart &&
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*actualStart == *expectStart) {
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actualStart++;
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expectStart++;
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}
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/* Work backwards to last character where they differ */
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while (actualEnd > actualStart &&
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expectEnd > expectStart &&
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*actualEnd == *expectEnd) {
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actualEnd--;
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expectEnd--;
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}
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}
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/* Show the trimmed differences */
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fprintf(stream, "\nExpect [");
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if ((expectEnd - expectStart + 1) &&
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fwrite(expectStart, (expectEnd-expectStart+1), 1, stream) != 1)
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return -1;
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fprintf(stream, "]\n");
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fprintf(stream, "Actual [");
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if ((actualEnd - actualStart + 1) &&
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fwrite(actualStart, (actualEnd-actualStart+1), 1, stream) != 1)
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return -1;
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fprintf(stream, "]\n");
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/* Pad to line up with test name ... in virTestRun */
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fprintf(stream, " ... ");
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return 0;
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}
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#if TEST_OOM
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static void
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virtTestErrorFuncQuiet(void *data ATTRIBUTE_UNUSED,
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virErrorPtr err ATTRIBUTE_UNUSED)
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{ }
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#endif
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#if TEST_OOM_TRACE
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static void
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virtTestErrorHook(int n, void *data ATTRIBUTE_UNUSED)
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{
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void *trace[30];
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int ntrace = ARRAY_CARDINALITY(trace);
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int i;
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char **symbols = NULL;
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ntrace = backtrace(trace, ntrace);
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symbols = backtrace_symbols(trace, ntrace);
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if (symbols) {
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fprintf(stderr, "Failing allocation %d at:\n", n);
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for (i = 0 ; i < ntrace ; i++) {
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if (symbols[i])
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fprintf(stderr, " TRACE: %s\n", symbols[i]);
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}
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free(symbols);
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}
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}
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#endif
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int virtTestMain(int argc,
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char **argv,
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int (*func)(int, char **))
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{
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char *debugStr;
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#if TEST_OOM
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int ret;
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int approxAlloc = 0;
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int n;
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char *oomStr = NULL;
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int oomCount;
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int mp = 0;
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pid_t *workers;
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int worker = 0;
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#endif
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if ((debugStr = getenv("VIR_TEST_DEBUG")) != NULL) {
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if (virStrToLong_ui(debugStr, NULL, 10, &testDebug) < 0)
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testDebug = 0;
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}
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#if TEST_OOM
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if ((oomStr = getenv("VIR_TEST_OOM")) != NULL) {
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if (virStrToLong_i(oomStr, NULL, 10, &oomCount) < 0)
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oomCount = 0;
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if (oomCount < 0)
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oomCount = 0;
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if (oomCount)
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testOOM = 1;
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}
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if (getenv("VIR_TEST_MP") != NULL) {
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mp = sysconf(_SC_NPROCESSORS_ONLN);
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fprintf(stderr, "Using %d worker processes\n", mp);
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if (VIR_ALLOC_N(workers, mp) < 0)
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return EXIT_FAILURE;
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}
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if (testOOM)
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virAllocTestInit();
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/* Run once to count allocs, and ensure it passes :-) */
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ret = (func)(argc, argv);
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if (ret != EXIT_SUCCESS)
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return EXIT_FAILURE;
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#if TEST_OOM_TRACE
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if (testDebug)
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virAllocTestHook(virtTestErrorHook, NULL);
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#endif
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if (testOOM) {
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/* Makes next test runs quiet... */
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testOOM++;
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virSetErrorFunc(NULL, virtTestErrorFuncQuiet);
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approxAlloc = virAllocTestCount();
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testCounter++;
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if (testDebug)
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fprintf(stderr, "%d) OOM...\n", testCounter);
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else
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fprintf(stderr, "%d) OOM of %d allocs ", testCounter, approxAlloc);
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if (mp) {
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int i;
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for (i = 0 ; i < mp ; i++) {
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workers[i] = fork();
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if (workers[i] == 0) {
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worker = i + 1;
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break;
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}
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}
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}
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/* Run once for each alloc, failing a different one
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and validating that the test case failed */
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for (n = 0; n < approxAlloc && (!mp || worker) ; n++) {
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if ((n % mp) != (worker - 1))
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continue;
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if (!testDebug) {
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if (mp)
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fprintf(stderr, "%d", worker);
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else
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fprintf(stderr, ".");
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fflush(stderr);
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}
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virAllocTestOOM(n+1, oomCount);
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if (((func)(argc, argv)) != EXIT_FAILURE) {
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ret = EXIT_FAILURE;
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break;
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}
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}
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if (mp) {
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if (worker) {
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_exit(ret);
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} else {
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int i, status;
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for (i = 0 ; i < mp ; i++) {
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waitpid(workers[i], &status, 0);
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if (WEXITSTATUS(status) != EXIT_SUCCESS)
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ret = EXIT_FAILURE;
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}
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VIR_FREE(workers);
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}
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}
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if (testDebug)
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fprintf(stderr, " ... OOM of %d allocs", approxAlloc);
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if (ret == EXIT_SUCCESS)
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fprintf(stderr, " OK\n");
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else
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fprintf(stderr, " FAILED\n");
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}
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return ret;
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#else
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return (func)(argc, argv);
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#endif
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}
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