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/*
* Copyright (c) 1997-2001 Silicon Graphics, Inc. All Rights Reserved.
*
* Exercise pmNewContext() for archives close to the NOFILE max fd limit.
* For incident: 504616
*/
#include <stdio.h>
#include <unistd.h>
#include <strings.h>
#include <errno.h>
#include <sys/resource.h>
#include <pcp/pmapi.h>
#include <pcp/impl.h>
#include "localconfig.h"
#if PCP_VER < 2200
#define PRINTF_P_PFX ""
#endif
static char *sfx[] = { "0", "index", "meta" };
int
main(int argc, char **argv)
{
int c;
int sts;
int errflag = 0;
int i;
int j;
int max_ctx;
int max_nofile;
int numopen = 0; /* pander to gcc */
int ctx = -1; /* pander to gcc */
int last_ctx;
char buf[100];
char lbuf[100];
struct rlimit top;
char *start = NULL;
char *end;
__pmSetProgname(pmProgname);
while ((c = getopt(argc, argv, "D:?")) != EOF) {
switch (c) {
case 'D': /* debug flag */
sts = __pmParseDebug(optarg);
if (sts < 0) {
fprintf(stderr, "%s: unrecognized debug flag specification (%s)\n",
pmProgname, optarg);
errflag++;
}
else
pmDebug |= sts;
break;
case '?':
default:
errflag++;
break;
}
}
sts = getrlimit(RLIMIT_NOFILE, &top);
for (max_nofile = 30; max_nofile > 20; max_nofile--) {
top.rlim_cur = max_nofile;
sts = setrlimit(RLIMIT_NOFILE, &top);
if (sts < 0) {
fprintf(stderr, "setrlimit(NOFILE=%d) failed: %s\n", max_nofile, strerror(errno));
exit(1);
}
sts = dup(0);
if (sts < 0) {
fprintf(stderr, "dup(0) failed: %s\n", strerror(errno));
exit(1);
}
max_ctx = (max_nofile + 2 - sts) / 3;
close(sts);
printf("max fd: %d max ctx#: %d\n", max_nofile, max_ctx);
last_ctx = -1;
for (i = 0; i <= max_ctx; i++) {
for (j = 0; j < 3; j++) {
sprintf(lbuf, "qa-tmp-%d.%s", i, sfx[j]);
sprintf(buf, "%s.%s", argv[optind], sfx[j]);
sts = link(buf, lbuf);
if (sts < 0) {
fprintf(stderr, "link %s -> %s failed: %s\n",
lbuf, buf, strerror(errno));
break;
}
}
sprintf(lbuf, "qa-tmp-%d", i);
ctx = pmNewContext(PM_CONTEXT_ARCHIVE, lbuf);
for (j = 0; j < 3; j++) {
sprintf(lbuf, "qa-tmp-%d.%s", i, sfx[j]);
sts = unlink(lbuf);
if (sts < 0) {
fprintf(stderr, "unlink %s failed: %s\n",
lbuf, strerror(errno));
break;
}
}
if (ctx < 0) {
printf("pmNewContext(): %s\n", pmErrStr(ctx));
if (i != max_ctx && i != max_ctx-1)
printf("Error: failure after ctx# %d, expected after %d or %d\n", last_ctx, max_ctx, max_ctx-1);
break;
}
else
numopen++;
last_ctx = ctx;
}
if (ctx >= 0)
printf("Error: pmNewContext() did not fail?\n");
for (i = 0; i <= last_ctx; i++)
pmDestroyContext(i);
if (start == NULL) {
start = sbrk(0);
numopen = 0;
}
}
end = sbrk(0);
if (end - start > 16*1024) {
printf("Memory leak? after first pass, %ld bytes per archive open-close\n",
(long)((end - start) / numopen));
printf("start: " PRINTF_P_PFX "%p end: " PRINTF_P_PFX "%p diff: %ld numopen: %d\n", start, end,
(long)(end - start), numopen);
}
return 0;
}
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