gprofng: a new GNU profiler

top-level
	* Makefile.def: Add gprofng module.
	* configure.ac: Add --enable-gprofng option.
	* src-release.sh: Add gprofng.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* gprofng: New directory.

binutils
	* MAINTAINERS: Add gprofng maintainer.
	* README-how-to-make-a-release: Add gprofng.

include.
	* collectorAPI.h: New file.
	* libcollector.h: New file.
	* libfcollector.h: New file.

1 files changed, 3728 insertions, 0 deletions

diff --git a/gprofng/libcollector/iotrace.c b/gprofng/libcollector/iotrace.c
new file mode 100644
index 0000000..462ccf2
--- /dev/null
+++ b/gprofng/libcollector/iotrace.c
@@ -0,0 +1,3728 @@
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+   Contributed by Oracle.
+
+   This file is part of GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+/*
+ *	IO events
+ */
+#include "config.h"
+#include <dlfcn.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+// create() and others are defined in fcntl.h.
+// Our 'create' should not have the __nonnull attribute
+#undef __nonnull
+#define __nonnull(x)
+#include <fcntl.h>
+
+#include "gp-defs.h"
+#include "collector_module.h"
+#include "gp-experiment.h"
+#include "data_pckts.h"
+#include "tsd.h"
+
+/* TprintfT(<level>,...) definitions.  Adjust per module as needed */
+#define DBG_LT0 0 // for high-level configuration, unexpected errors/warnings
+#define DBG_LTT 0 // for interposition on GLIBC functions
+#define DBG_LT1 1 // for configuration details, warnings
+#define DBG_LT2 2
+#define DBG_LT3 3
+
+/* define the packet that will be written out */
+typedef struct IOTrace_packet
+{ /* IO tracing packet */
+  Common_packet comm;
+  IOTrace_type iotype;      /* IO type */
+  int32_t fd;               /* file descriptor */
+  Size_type nbyte;          /* number of bytes */
+  hrtime_t requested;       /* time of IO requested */
+  int32_t ofd;              /* original file descriptor */
+  FileSystem_type fstype;   /* file system type */
+  char fname;               /* file name */
+} IOTrace_packet;
+
+typedef long long offset_t;
+
+static int open_experiment (const char *);
+static int start_data_collection (void);
+static int stop_data_collection (void);
+static int close_experiment (void);
+static int detach_experiment (void);
+static int init_io_intf ();
+
+static ModuleInterface module_interface ={
+  SP_IOTRACE_FILE,          /* description */
+  NULL,                     /* initInterface */
+  open_experiment,          /* openExperiment */
+  start_data_collection,    /* startDataCollection */
+  stop_data_collection,     /* stopDataCollection */
+  close_experiment,         /* closeExperiment */
+  detach_experiment         /* detachExperiment (fork child) */
+};
+
+static CollectorInterface *collector_interface = NULL;
+static struct Heap *io_heap = NULL;
+static int io_mode = 0;
+static CollectorModule io_hndl = COLLECTOR_MODULE_ERR;
+static unsigned io_key = COLLECTOR_TSD_INVALID_KEY;
+
+#define CHCK_REENTRANCE(x)   (!io_mode || ((x) = collector_interface->getKey( io_key )) == NULL || (*(x) != 0))
+#define RECHCK_REENTRANCE(x) (!io_mode || ((x) = collector_interface->getKey( io_key )) == NULL || (*(x) == 0))
+#define PUSH_REENTRANCE(x)   ((*(x))++)
+#define POP_REENTRANCE(x)    ((*(x))--)
+
+#define CALL_REAL(x)         (__real_##x)
+#define NULL_PTR(x)          (__real_##x == NULL)
+
+#define gethrtime collector_interface->getHiResTime
+
+#ifdef DEBUG
+#define Tprintf(...)    if (collector_interface) collector_interface->writeDebugInfo( 0, __VA_ARGS__ )
+#define TprintfT(...)   if (collector_interface) collector_interface->writeDebugInfo( 1, __VA_ARGS__ )
+#else
+#define Tprintf(...)
+#define TprintfT(...)
+#endif
+
+/* interposition function handles */
+static int (*__real_open)(const char *path, int oflag, ...) = NULL;
+static int (*__real_fcntl)(int fildes, int cmd, ...) = NULL;
+static int (*__real_openat)(int fildes, const char *path, int oflag, ...) = NULL;
+static int (*__real_close)(int fildes) = NULL;
+static FILE *(*__real_fopen)(const char *filename, const char *mode) = NULL;
+static int (*__real_fclose)(FILE *stream) = NULL;
+static int (*__real_dup)(int fildes) = NULL;
+static int (*__real_dup2)(int fildes, int fildes2) = NULL;
+static int (*__real_pipe)(int fildes[2]) = NULL;
+static int (*__real_socket)(int domain, int type, int protocol) = NULL;
+static int (*__real_mkstemp)(char *template) = NULL;
+static int (*__real_mkstemps)(char *template, int slen) = NULL;
+static int (*__real_creat)(const char *path, mode_t mode) = NULL;
+static FILE *(*__real_fdopen)(int fildes, const char *mode) = NULL;
+static ssize_t (*__real_read)(int fildes, void *buf, size_t nbyte) = NULL;
+static ssize_t (*__real_write)(int fildes, const void *buf, size_t nbyte) = NULL;
+static ssize_t (*__real_readv)(int fildes, const struct iovec *iov, int iovcnt) = NULL;
+static ssize_t (*__real_writev)(int fildes, const struct iovec *iov, int iovcnt) = NULL;
+static size_t (*__real_fread)(void *ptr, size_t size, size_t nitems, FILE *stream) = NULL;
+static size_t (*__real_fwrite)(const void *ptr, size_t size, size_t nitems, FILE *stream) = NULL;
+static ssize_t (*__real_pread)(int fildes, void *buf, size_t nbyte, off_t offset) = NULL;
+static ssize_t (*__real_pwrite)(int fildes, const void *buf, size_t nbyte, off_t offset) = NULL;
+static ssize_t (*__real_pwrite64)(int fildes, const void *buf, size_t nbyte, off64_t offset) = NULL;
+static char *(*__real_fgets)(char *s, int n, FILE *stream) = NULL;
+static int (*__real_fputs)(const char *s, FILE *stream) = NULL;
+static int (*__real_fputc)(int c, FILE *stream) = NULL;
+static int (*__real_fprintf)(FILE *stream, const char *format, ...) = NULL;
+static int (*__real_vfprintf)(FILE *stream, const char *format, va_list ap) = NULL;
+static off_t (*__real_lseek)(int fildes, off_t offset, int whence) = NULL;
+static offset_t (*__real_llseek)(int fildes, offset_t offset, int whence) = NULL;
+static int (*__real_chmod)(const char *path, mode_t mode) = NULL;
+static int (*__real_access)(const char *path, int amode) = NULL;
+static int (*__real_rename)(const char *old, const char *new) = NULL;
+static int (*__real_mkdir)(const char *path, mode_t mode) = NULL;
+static int (*__real_getdents)(int fildes, struct dirent *buf, size_t nbyte) = NULL;
+static int (*__real_unlink)(const char *path) = NULL;
+static int (*__real_fseek)(FILE *stream, long offset, int whence) = NULL;
+static void (*__real_rewind)(FILE *stream) = NULL;
+static long (*__real_ftell)(FILE *stream) = NULL;
+static int (*__real_fgetpos)(FILE *stream, fpos_t *pos) = NULL;
+static int (*__real_fsetpos)(FILE *stream, const fpos_t *pos) = NULL;
+static int (*__real_fsync)(int fildes) = NULL;
+static struct dirent *(*__real_readdir)(DIR *dirp) = NULL;
+static int (*__real_flock)(int fd, int operation) = NULL;
+static int (*__real_lockf)(int fildes, int function, off_t size) = NULL;
+static int (*__real_fflush)(FILE *stream) = NULL;
+
+#if WSIZE(32)
+static int (*__real_open64)(const char *path, int oflag, ...) = NULL;
+static int (*__real_creat64)(const char *path, mode_t mode) = NULL;
+static int (*__real_fgetpos64)(FILE *stream, fpos64_t *pos) = NULL;
+static int (*__real_fsetpos64)(FILE *stream, const fpos64_t *pos) = NULL;
+
+#if ARCH(Intel)
+static FILE *(*__real_fopen_2_1)(const char *filename, const char *mode) = NULL;
+static int (*__real_fclose_2_1)(FILE *stream) = NULL;
+static FILE *(*__real_fdopen_2_1)(int fildes, const char *mode) = NULL;
+static int (*__real_fgetpos_2_2)(FILE *stream, fpos_t *pos) = NULL;
+static int (*__real_fsetpos_2_2)(FILE *stream, const fpos_t *pos) = NULL;
+static int (*__real_fgetpos64_2_2)(FILE *stream, fpos64_t *pos) = NULL;
+static int (*__real_fsetpos64_2_2)(FILE *stream, const fpos64_t *pos) = NULL;
+static int (*__real_open64_2_2)(const char *path, int oflag, ...) = NULL;
+static ssize_t (*__real_pread_2_2)(int fildes, void *buf, size_t nbyte, off_t offset) = NULL;
+static ssize_t (*__real_pwrite_2_2)(int fildes, const void *buf, size_t nbyte, off_t offset) = NULL;
+static ssize_t (*__real_pwrite64_2_2)(int fildes, const void *buf, size_t nbyte, off64_t offset) = NULL;
+static FILE *(*__real_fopen_2_0)(const char *filename, const char *mode) = NULL;
+static int (*__real_fclose_2_0)(FILE *stream) = NULL;
+static FILE *(*__real_fdopen_2_0)(int fildes, const char *mode) = NULL;
+static int (*__real_fgetpos_2_0)(FILE *stream, fpos_t *pos) = NULL;
+static int (*__real_fsetpos_2_0)(FILE *stream, const fpos_t *pos) = NULL;
+static int (*__real_fgetpos64_2_1)(FILE *stream, fpos64_t *pos) = NULL;
+static int (*__real_fsetpos64_2_1)(FILE *stream, const fpos64_t *pos) = NULL;
+static int (*__real_open64_2_1)(const char *path, int oflag, ...) = NULL;
+static ssize_t (*__real_pread_2_1)(int fildes, void *buf, size_t nbyte, off_t offset) = NULL;
+static ssize_t (*__real_pwrite_2_1)(int fildes, const void *buf, size_t nbyte, off_t offset) = NULL;
+static ssize_t (*__real_pwrite64_2_1)(int fildes, const void *buf, size_t nbyte, off64_t offset) = NULL;
+#endif /* ARCH() */
+#endif /* WSIZE(32) */
+
+static int
+collector_align_pktsize (int sz)
+{
+  int pktSize = sz;
+  if (sz <= 0)
+    return sz;
+  if ((sz % 8) != 0)
+    {
+      pktSize = (sz / 8) + 1;
+      pktSize *= 8;
+    }
+  return pktSize;
+}
+
+static void
+collector_memset (void *s, int c, size_t n)
+{
+  unsigned char *s1 = s;
+  while (n--)
+    *s1++ = (unsigned char) c;
+}
+
+static size_t
+collector_strlen (const char *s)
+{
+  if (s == NULL)
+    return 0;
+  int len = -1;
+  while (s[++len] != '\0')
+    ;
+  return len;
+}
+
+static size_t
+collector_strncpy (char *dst, const char *src, size_t dstsize)
+{
+  size_t i;
+  for (i = 0; i < dstsize; i++)
+    {
+      dst[i] = src[i];
+      if (src[i] == '\0')
+	break;
+    }
+  return i;
+}
+
+static char *
+collector_strchr (const char *s, int c)
+{
+  do
+    {
+      if (*s == (char) c)
+	return ((char *) s);
+    }
+  while (*s++);
+  return (NULL);
+}
+
+static FileSystem_type
+collector_fstype (const char *path)
+{
+  return UNKNOWNFS_TYPE;
+}
+
+void
+__collector_module_init (CollectorInterface *_collector_interface)
+{
+  if (_collector_interface == NULL)
+    return;
+  collector_interface = _collector_interface;
+  Tprintf (0, "iotrace: __collector_module_init\n");
+  io_hndl = collector_interface->registerModule (&module_interface);
+  /* Initialize next module */
+  ModuleInitFunc next_init = (ModuleInitFunc) dlsym (RTLD_NEXT, "__collector_module_init");
+  if (next_init != NULL)
+    next_init (_collector_interface);
+  return;
+}
+
+static int
+open_experiment (const char *exp)
+{
+  if (collector_interface == NULL)
+    {
+      Tprintf (0, "iotrace: collector_interface is null.\n");
+      return COL_ERROR_IOINIT;
+    }
+  if (io_hndl == COLLECTOR_MODULE_ERR)
+    {
+      Tprintf (0, "iotrace: handle create failed.\n");
+      collector_interface->writeLog ("<event kind=\"%s\" id=\"%d\">data handle not created</event>\n",
+				     SP_JCMD_CERROR, COL_ERROR_IOINIT);
+      return COL_ERROR_IOINIT;
+    }
+  TprintfT (0, "iotrace: open_experiment %s\n", exp);
+  if (NULL_PTR (fopen))
+    init_io_intf ();
+  if (io_heap == NULL)
+    {
+      io_heap = collector_interface->newHeap ();
+      if (io_heap == NULL)
+	{
+	  Tprintf (0, "iotrace: new heap failed.\n");
+	  collector_interface->writeLog ("<event kind=\"%s\" id=\"%d\">new iotrace heap not created</event>\n",
+					 SP_JCMD_CERROR, COL_ERROR_IOINIT);
+	  return COL_ERROR_IOINIT;
+	}
+    }
+
+  const char *params = collector_interface->getParams ();
+  while (params)
+    {
+      if ((params[0] == 'i') && (params[1] == ':'))
+	{
+	  params += 2;
+	  break;
+	}
+      params = collector_strchr (params, ';');
+      if (params)
+	params++;
+    }
+  if (params == NULL)  /* IO data collection not specified */
+    return COL_ERROR_IOINIT;
+
+  io_key = collector_interface->createKey (sizeof ( int), NULL, NULL);
+  if (io_key == (unsigned) - 1)
+    {
+      Tprintf (0, "iotrace: TSD key create failed.\n");
+      collector_interface->writeLog ("<event kind=\"%s\" id=\"%d\">TSD key not created</event>\n",
+				     SP_JCMD_CERROR, COL_ERROR_IOINIT);
+      return COL_ERROR_IOINIT;
+    }
+
+  collector_interface->writeLog ("<profile name=\"%s\">\n", SP_JCMD_IOTRACE);
+  collector_interface->writeLog ("  <profdata fname=\"%s\"/>\n",
+				 module_interface.description);
+  /* Record IOTrace_packet description */
+  IOTrace_packet *pp = NULL;
+  collector_interface->writeLog ("  <profpckt kind=\"%d\" uname=\"IO tracing data\">\n", IOTRACE_PCKT);
+  collector_interface->writeLog ("    <field name=\"LWPID\" uname=\"Lightweight process id\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->comm.lwp_id, sizeof (pp->comm.lwp_id) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"THRID\" uname=\"Thread number\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->comm.thr_id, sizeof (pp->comm.thr_id) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"CPUID\" uname=\"CPU id\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->comm.cpu_id, sizeof (pp->comm.cpu_id) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"TSTAMP\" uname=\"High resolution timestamp\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->comm.tstamp, sizeof (pp->comm.tstamp) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"FRINFO\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->comm.frinfo, sizeof (pp->comm.frinfo) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"IOTYPE\" uname=\"IO trace function type\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->iotype, sizeof (pp->iotype) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"IOFD\" uname=\"File descriptor\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->fd, sizeof (pp->fd) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"IONBYTE\" uname=\"Number of bytes\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->nbyte, sizeof (pp->nbyte) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"IORQST\" uname=\"Time of IO requested\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->requested, sizeof (pp->requested) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"IOOFD\" uname=\"Original file descriptor\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->ofd, sizeof (pp->ofd) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"IOFSTYPE\" uname=\"File system type\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->fstype, sizeof (pp->fstype) == 4 ? "INT32" : "INT64");
+  collector_interface->writeLog ("    <field name=\"IOFNAME\" uname=\"File name\" offset=\"%d\" type=\"%s\"/>\n",
+				 &pp->fname, "STRING");
+  collector_interface->writeLog ("  </profpckt>\n");
+  collector_interface->writeLog ("</profile>\n");
+  return COL_ERROR_NONE;
+}
+
+static int
+start_data_collection (void)
+{
+  io_mode = 1;
+  Tprintf (0, "iotrace: start_data_collection\n");
+  return 0;
+}
+
+static int
+stop_data_collection (void)
+{
+  io_mode = 0;
+  Tprintf (0, "iotrace: stop_data_collection\n");
+  return 0;
+}
+
+static int
+close_experiment (void)
+{
+  io_mode = 0;
+  io_key = COLLECTOR_TSD_INVALID_KEY;
+  if (io_heap != NULL)
+    {
+      collector_interface->deleteHeap (io_heap);
+      io_heap = NULL;
+    }
+  Tprintf (0, "iotrace: close_experiment\n");
+  return 0;
+}
+
+static int
+detach_experiment (void)
+{
+  /* fork child.  Clean up state but don't write to experiment */
+  io_mode = 0;
+  io_key = COLLECTOR_TSD_INVALID_KEY;
+  if (io_heap != NULL)
+    {
+      collector_interface->deleteHeap (io_heap);
+      io_heap = NULL;
+    }
+  Tprintf (0, "iotrace: detach_experiment\n");
+  return 0;
+}
+
+static int
+init_io_intf ()
+{
+  void *dlflag;
+  int rc = 0;
+  /* if we detect recursion/reentrance, SEGV so we can get a stack */
+  static int init_io_intf_started;
+  static int init_io_intf_finished;
+  init_io_intf_started++;
+  if (!init_io_intf_finished && init_io_intf_started >= 3)
+    {
+      /* pull the plug if recursion occurs... */
+      abort ();
+    }
+
+  /* lookup fprint to print fatal error message */
+  void *ptr = dlsym (RTLD_NEXT, "fprintf");
+  if (ptr)
+    __real_fprintf = (int (*)(FILE*, const char*, ...)) ptr;
+  else
+    abort ();
+
+#if ARCH(Intel)
+#if WSIZE(32)
+#define SYS_FOPEN_X_VERSION "GLIBC_2.1"
+#define SYS_FGETPOS_X_VERSION "GLIBC_2.2"
+#define SYS_FGETPOS64_X_VERSION "GLIBC_2.2"
+#define SYS_OPEN64_X_VERSION "GLIBC_2.2"
+#define SYS_PREAD_X_VERSION "GLIBC_2.2"
+#define SYS_PWRITE_X_VERSION "GLIBC_2.2"
+#define SYS_PWRITE64_X_VERSION "GLIBC_2.2"
+#else /* WSIZE(64) */
+#define SYS_FOPEN_X_VERSION "GLIBC_2.2.5"
+#define SYS_FGETPOS_X_VERSION "GLIBC_2.2.5"
+#endif
+#elif ARCH(SPARC)
+#if WSIZE(32)
+#define SYS_FOPEN_X_VERSION "GLIBC_2.1"
+#define SYS_FGETPOS_X_VERSION "GLIBC_2.2"
+#else /* WSIZE(64) */
+#define SYS_FOPEN_X_VERSION "GLIBC_2.2"
+#define SYS_FGETPOS_X_VERSION "GLIBC_2.2"
+#endif
+#elif ARCH(Aarch64)
+#define SYS_FOPEN_X_VERSION      "GLIBC_2.17"
+#define SYS_FGETPOS_X_VERSION    "GLIBC_2.17"
+#endif /* ARCH() */
+
+#if WSIZE(32)
+  dlflag = RTLD_NEXT;
+  __real_fopen = (FILE * (*)(const char*, const char*))dlvsym (dlflag, "fopen", SYS_FOPEN_X_VERSION);
+  if (__real_fopen == NULL)
+    {
+      /* We are probably dlopened after libc,
+       * try to search in the previously loaded objects
+       */
+      __real_fopen = (FILE * (*)(const char*, const char*))dlvsym (RTLD_DEFAULT, "fopen", SYS_FOPEN_X_VERSION);
+      if (__real_fopen != NULL)
+	{
+	  Tprintf (0, "iotrace: WARNING: init_io_intf() using RTLD_DEFAULT for Linux io routines\n");
+	  dlflag = RTLD_DEFAULT;
+	}
+      else
+	{
+	  CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fopen\n");
+	  rc = COL_ERROR_IOINIT;
+	}
+    }
+
+  __real_fclose = (int (*)(FILE*))dlvsym (dlflag, "fclose", SYS_FOPEN_X_VERSION);
+  if (__real_fclose == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fclose\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fdopen = (FILE * (*)(int, const char*))dlvsym (dlflag, "fdopen", SYS_FOPEN_X_VERSION);
+  if (__real_fdopen == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fdopen\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fgetpos = (int (*)(FILE*, fpos_t*))dlvsym (dlflag, "fgetpos", SYS_FGETPOS_X_VERSION);
+  if (__real_fgetpos == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fgetpos\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fsetpos = (int (*)(FILE*, const fpos_t*))dlvsym (dlflag, "fsetpos", SYS_FGETPOS_X_VERSION);
+  if (__real_fsetpos == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fsetpos\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+
+#if ARCH(Intel)
+  __real_fopen_2_1 = __real_fopen;
+  __real_fclose_2_1 = __real_fclose;
+  __real_fdopen_2_1 = __real_fdopen;
+  __real_fgetpos_2_2 = __real_fgetpos;
+  __real_fsetpos_2_2 = __real_fsetpos;
+
+  __real_fopen_2_0 = (FILE * (*)(const char*, const char*))dlvsym (dlflag, "fopen", "GLIBC_2.0");
+  if (__real_fopen_2_0 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fopen_2_0\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fclose_2_0 = (int (*)(FILE*))dlvsym (dlflag, "fclose", "GLIBC_2.0");
+  if (__real_fclose_2_0 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fclose_2_0\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fdopen_2_0 = (FILE * (*)(int, const char*))dlvsym (dlflag, "fdopen", "GLIBC_2.0");
+  if (__real_fdopen_2_0 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fdopen_2_0\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fgetpos_2_0 = (int (*)(FILE*, fpos_t*))dlvsym (dlflag, "fgetpos", "GLIBC_2.0");
+  if (__real_fgetpos_2_0 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fgetpos_2_0\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fsetpos_2_0 = (int (*)(FILE*, const fpos_t*))dlvsym (dlflag, "fsetpos", "GLIBC_2.0");
+  if (__real_fsetpos_2_0 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fsetpos_2_0\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fgetpos64_2_1 = (int (*)(FILE*, fpos64_t*))dlvsym (dlflag, "fgetpos64", "GLIBC_2.1");
+  if (__real_fgetpos64_2_1 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fgetpos64_2_1\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fsetpos64_2_1 = (int (*)(FILE*, const fpos64_t*))dlvsym (dlflag, "fsetpos64", "GLIBC_2.1");
+  if (__real_fsetpos64_2_1 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fsetpos64_2_1\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_open64_2_1 = (int (*)(const char*, int, ...))dlvsym (dlflag, "open64", "GLIBC_2.1");
+  if (__real_open64_2_1 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT open64_2_1\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pread_2_1 = (int (*)(int fildes, void *buf, size_t nbyte, off_t offset))dlvsym (dlflag, "pread", "GLIBC_2.1");
+  if (__real_pread_2_1 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pread_2_1\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pwrite_2_1 = (int (*)(int fildes, const void *buf, size_t nbyte, off_t offset))dlvsym (dlflag, "pwrite", "GLIBC_2.1");
+  if (__real_pwrite_2_1 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pwrite_2_1\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pwrite64_2_1 = (int (*)(int fildes, const void *buf, size_t nbyte, off64_t offset))dlvsym (dlflag, "pwrite64", "GLIBC_2.1");
+  if (__real_pwrite64_2_1 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pwrite64_2_1\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fgetpos64_2_2 = (int (*)(FILE*, fpos64_t*))dlvsym (dlflag, "fgetpos64", SYS_FGETPOS64_X_VERSION);
+  if (__real_fgetpos64_2_2 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fgetpos64_2_2\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fsetpos64_2_2 = (int (*)(FILE*, const fpos64_t*))dlvsym (dlflag, "fsetpos64", SYS_FGETPOS64_X_VERSION);
+  if (__real_fsetpos64_2_2 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fsetpos64_2_2\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_open64_2_2 = (int (*)(const char*, int, ...))dlvsym (dlflag, "open64", SYS_OPEN64_X_VERSION);
+  if (__real_open64_2_2 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT open64_2_2\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pread_2_2 = (int (*)(int fildes, void *buf, size_t nbyte, off_t offset))dlvsym (dlflag, "pread", SYS_PREAD_X_VERSION);
+  if (__real_pread_2_2 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pread_2_2\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pwrite_2_2 = (int (*)(int fildes, const void *buf, size_t nbyte, off_t offset))dlvsym (dlflag, "pwrite", SYS_PWRITE_X_VERSION);
+  if (__real_pwrite_2_2 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pwrite_2_2\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pwrite64_2_2 = (int (*)(int fildes, const void *buf, size_t nbyte, off64_t offset))dlvsym (dlflag, "pwrite64", SYS_PWRITE64_X_VERSION);
+  if (__real_pwrite64_2_2 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pwrite64_2_2\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+#endif
+
+#else /* WSIZE(64) */
+  dlflag = RTLD_NEXT;
+  __real_fopen = (FILE * (*)(const char*, const char*))dlvsym (dlflag, "fopen", SYS_FOPEN_X_VERSION);
+  if (__real_fopen == NULL)
+    {
+      /* We are probably dlopened after libc,
+       * try to search in the previously loaded objects
+       */
+      __real_fopen = (FILE * (*)(const char*, const char*))dlvsym (RTLD_DEFAULT, "fopen", SYS_FOPEN_X_VERSION);
+      if (__real_fopen != NULL)
+	{
+	  Tprintf (0, "iotrace: WARNING: init_io_intf() using RTLD_DEFAULT for Linux io routines\n");
+	  dlflag = RTLD_DEFAULT;
+	}
+      else
+	{
+	  CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fopen\n");
+	  rc = COL_ERROR_IOINIT;
+	}
+    }
+
+  __real_fclose = (int (*)(FILE*))dlvsym (dlflag, "fclose", SYS_FOPEN_X_VERSION);
+  if (__real_fclose == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fclose\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fdopen = (FILE * (*)(int, const char*))dlvsym (dlflag, "fdopen", SYS_FOPEN_X_VERSION);
+  if (__real_fdopen == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fdopen\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fgetpos = (int (*)(FILE*, fpos_t*))dlvsym (dlflag, "fgetpos", SYS_FGETPOS_X_VERSION);
+  if (__real_fgetpos == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fgetpos\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fsetpos = (int (*)(FILE*, const fpos_t*))dlvsym (dlflag, "fsetpos", SYS_FGETPOS_X_VERSION);
+  if (__real_fsetpos == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fsetpos\n");
+      rc = COL_ERROR_IOINIT;
+    }
+#endif /* WSIZE(32) */
+
+  __real_open = (int (*)(const char*, int, ...))dlsym (dlflag, "open");
+  if (__real_open == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT open\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+#if WSIZE(32)
+  __real_open64 = (int (*)(const char*, int, ...))dlsym (dlflag, "open64");
+  if (__real_open64 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT open64\n");
+      rc = COL_ERROR_IOINIT;
+    }
+#endif
+
+  __real_fcntl = (int (*)(int, int, ...))dlsym (dlflag, "fcntl");
+  if (__real_fcntl == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fcntl\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_openat = (int (*)(int, const char*, int, ...))dlsym (dlflag, "openat");
+  if (__real_openat == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT openat\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_close = (int (*)(int))dlsym (dlflag, "close");
+  if (__real_close == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT close\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_dup = (int (*)(int))dlsym (dlflag, "dup");
+  if (__real_dup == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT dup\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_dup2 = (int (*)(int, int))dlsym (dlflag, "dup2");
+  if (__real_dup2 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT dup2\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pipe = (int (*)(int[]))dlsym (dlflag, "pipe");
+  if (__real_pipe == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pipe\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_socket = (int (*)(int, int, int))dlsym (dlflag, "socket");
+  if (__real_socket == NULL)
+    {
+      __real_socket = (int (*)(int, int, int))dlsym (RTLD_NEXT, "socket");
+      if (__real_socket == NULL)
+	{
+#if 0
+	  CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERXXX_IOINIT socket\n");
+	  rc = COL_ERROR_IOINIT;
+#endif
+	}
+    }
+
+  __real_mkstemp = (int (*)(char*))dlsym (dlflag, "mkstemp");
+  if (__real_mkstemp == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT mkstemp\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_mkstemps = (int (*)(char*, int))dlsym (dlflag, "mkstemps");
+  if (__real_mkstemps == NULL)
+    {
+#if 0
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERXXX_IOINIT mkstemps\n");
+      rc = COL_ERROR_IOINIT;
+#endif
+    }
+
+  __real_creat = (int (*)(const char*, mode_t))dlsym (dlflag, "creat");
+  if (__real_creat == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT creat\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+#if WSIZE(32)
+  __real_creat64 = (int (*)(const char*, mode_t))dlsym (dlflag, "creat64");
+  if (__real_creat64 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT creat64\n");
+      rc = COL_ERROR_IOINIT;
+    }
+#endif
+
+  __real_read = (ssize_t (*)(int, void*, size_t))dlsym (dlflag, "read");
+  if (__real_read == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT read\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_write = (ssize_t (*)(int, const void*, size_t))dlsym (dlflag, "write");
+  if (__real_write == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT write\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_readv = (ssize_t (*)(int, const struct iovec*, int))dlsym (dlflag, "readv");
+  if (__real_readv == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT readv\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_writev = (ssize_t (*)(int, const struct iovec*, int))dlsym (dlflag, "writev");
+  if (__real_writev == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT writev\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fread = (size_t (*)(void*, size_t, size_t, FILE*))dlsym (dlflag, "fread");
+  if (__real_fread == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fread\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fwrite = (size_t (*)(const void*, size_t, size_t, FILE*))dlsym (dlflag, "fwrite");
+  if (__real_fwrite == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fwrite\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pread = (ssize_t (*)(int, void*, size_t, off_t))dlsym (dlflag, "pread");
+  if (__real_pread == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pread\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pwrite = (ssize_t (*)(int, const void*, size_t, off_t))dlsym (dlflag, "pwrite");
+  if (__real_pwrite == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pwrite\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_pwrite64 = (ssize_t (*)(int, const void*, size_t, off64_t))dlsym (dlflag, "pwrite64");
+  if (__real_pwrite64 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT pwrite64\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fgets = (char* (*)(char*, int, FILE*))dlsym (dlflag, "fgets");
+  if (__real_fgets == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fgets\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fputs = (int (*)(const char*, FILE*))dlsym (dlflag, "fputs");
+  if (__real_fputs == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fputs\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fputc = (int (*)(int, FILE*))dlsym (dlflag, "fputc");
+  if (__real_fputc == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fputc\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_vfprintf = (int (*)(FILE*, const char*, va_list))dlsym (dlflag, "vfprintf");
+  if (__real_vfprintf == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT vfprintf\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+
+  __real_lseek = (off_t (*)(int, off_t, int))dlsym (dlflag, "lseek");
+  if (__real_lseek == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT lseek\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_llseek = (offset_t (*)(int, offset_t, int))dlsym (dlflag, "llseek");
+  if (__real_llseek == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT llseek\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_chmod = (int (*)(const char*, mode_t))dlsym (dlflag, "chmod");
+  if (__real_chmod == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT chmod\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_access = (int (*)(const char*, int))dlsym (dlflag, "access");
+  if (__real_access == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT access\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_rename = (int (*)(const char*, const char*))dlsym (dlflag, "rename");
+  if (__real_rename == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT rename\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_mkdir = (int (*)(const char*, mode_t))dlsym (dlflag, "mkdir");
+  if (__real_mkdir == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT mkdir\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_getdents = (int (*)(int, struct dirent*, size_t))dlsym (dlflag, "getdents");
+  if (__real_getdents == NULL)
+    {
+#if 0
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERXXX_IOINIT getdents\n");
+      rc = COL_ERROR_IOINIT;
+#endif
+    }
+
+  __real_unlink = (int (*)(const char*))dlsym (dlflag, "unlink");
+  if (__real_unlink == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT unlink\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fseek = (int (*)(FILE*, long, int))dlsym (dlflag, "fseek");
+  if (__real_fseek == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fseek\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_rewind = (void (*)(FILE*))dlsym (dlflag, "rewind");
+  if (__real_rewind == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT rewind\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_ftell = (long (*)(FILE*))dlsym (dlflag, "ftell");
+  if (__real_ftell == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT ftell\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fsync = (int (*)(int))dlsym (dlflag, "fsync");
+  if (__real_fsync == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fsync\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_readdir = (struct dirent * (*)(DIR*))dlsym (dlflag, "readdir");
+  if (__real_readdir == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT readdir\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_flock = (int (*)(int, int))dlsym (dlflag, "flock");
+  if (__real_flock == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT flock\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_lockf = (int (*)(int, int, off_t))dlsym (dlflag, "lockf");
+  if (__real_lockf == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT lockf\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fflush = (int (*)(FILE*))dlsym (dlflag, "fflush");
+  if (__real_fflush == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fflush\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+#if WSIZE(32)
+  __real_fgetpos64 = (int (*)(FILE*, fpos64_t*))dlsym (dlflag, "fgetpos64");
+  if (__real_fgetpos64 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fgetpos64\n");
+      rc = COL_ERROR_IOINIT;
+    }
+
+  __real_fsetpos64 = (int (*)(FILE*, const fpos64_t*))dlsym (dlflag, "fsetpos64");
+  if (__real_fsetpos64 == NULL)
+    {
+      CALL_REAL (fprintf)(stderr, "iotrace_init COL_ERROR_IOINIT fsetpos64\n");
+      rc = COL_ERROR_IOINIT;
+    }
+#endif
+  init_io_intf_finished++;
+  return rc;
+}
+
+/*------------------------------------------------------------- open */
+int
+open (const char *path, int oflag, ...)
+{
+  int *guard;
+  int fd;
+  void *packet;
+  IOTrace_packet *iopkt;
+  mode_t mode;
+  va_list ap;
+  size_t sz;
+  unsigned pktSize;
+
+  va_start (ap, oflag);
+  mode = va_arg (ap, mode_t);
+  va_end (ap);
+
+  if (NULL_PTR (open))
+    init_io_intf ();
+
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (open)(path, oflag, mode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (open)(path, oflag, mode);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (fd != -1)
+	iopkt->iotype = OPEN_TRACE;
+      else
+	iopkt->iotype = OPEN_TRACE_ERROR;
+      iopkt->fd = fd;
+      iopkt->fstype = collector_fstype (path);
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: open cannot allocate memory\n");
+      return -1;
+    }
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- open64 */
+#if ARCH(Intel) && WSIZE(32)
+// map interposed symbol versions
+static int
+__collector_open64_symver (int(real_open64) (const char *, int, ...),
+			   const char *path, int oflag, mode_t mode);
+
+int
+__collector_open64_2_2 (const char *path, int oflag, ...)
+{
+  mode_t mode;
+  va_list ap;
+  va_start (ap, oflag);
+  mode = va_arg (ap, mode_t);
+  va_end (ap);
+  TprintfT (DBG_LTT,
+	    "iotrace: __collector_open64_2_2@%p(path=%s, oflag=0%o, mode=0%o\n",
+	    CALL_REAL (open64_2_2), path ? path : "NULL", oflag, mode);
+  if (NULL_PTR (open64))
+    init_io_intf ();
+  return __collector_open64_symver (CALL_REAL (open64_2_2), path, oflag, mode);
+}
+
+int
+__collector_open64_2_1 (const char *path, int oflag, ...)
+{
+  mode_t mode;
+  va_list ap;
+  va_start (ap, oflag);
+  mode = va_arg (ap, mode_t);
+  va_end (ap);
+  TprintfT (DBG_LTT,
+	    "iotrace: __collector_open64_2_1@%p(path=%s, oflag=0%o, mode=0%o\n",
+	    CALL_REAL (open64_2_1), path ? path : "NULL", oflag, mode);
+  if (NULL_PTR (open64))
+    init_io_intf ();
+  return __collector_open64_symver (CALL_REAL (open64_2_1), path, oflag, mode);
+}
+
+__asm__(".symver __collector_open64_2_2,open64@@GLIBC_2.2");
+__asm__(".symver __collector_open64_2_1,open64@GLIBC_2.1");
+
+#endif /* ARCH(Intel) && WSIZE(32) */
+#if WSIZE(32)
+#if ARCH(Intel) && WSIZE(32)
+
+static int
+__collector_open64_symver (int(real_open64) (const char *, int, ...),
+			   const char *path, int oflag, mode_t mode)
+{
+  int *guard;
+  int fd;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (open64))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return (real_open64) (path, oflag, mode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = real_open64 (path, oflag, mode);
+#else /* ^ARCH(Intel) && WSIZE(32) */
+
+int
+open64 (const char *path, int oflag, ...)
+{
+  int *guard;
+  int fd;
+  void *packet;
+  IOTrace_packet *iopkt;
+  mode_t mode;
+  va_list ap;
+  size_t sz;
+  unsigned pktSize;
+
+  va_start (ap, oflag);
+  mode = va_arg (ap, mode_t);
+  va_end (ap);
+  if (NULL_PTR (open64))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (open64)(path, oflag, mode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (open64)(path, oflag, mode);
+#endif /* ^ARCH(Intel) && WSIZE(32) */
+
+  if (RECHCK_REENTRANCE (guard) || path == NULL)
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (fd != -1)
+	iopkt->iotype = OPEN_TRACE;
+      else
+	iopkt->iotype = OPEN_TRACE_ERROR;
+      iopkt->fd = fd;
+      iopkt->fstype = collector_fstype (path);
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: open64 cannot allocate memory\n");
+      return -1;
+    }
+  POP_REENTRANCE (guard);
+  return fd;
+}
+#endif
+
+#define F_ERROR_ARG     0
+#define F_INT_ARG       1
+#define F_LONG_ARG      2
+#define F_VOID_ARG      3
+
+/*
+ * The following macro is not defined in the
+ * older versions of Linux.
+ * #define F_DUPFD_CLOEXEC	1030
+ *
+ * Instead use the command that is defined below
+ * until we start compiling mpmt on the newer
+ * versions of Linux.
+ */
+#define TMP_F_DUPFD_CLOEXEC 1030
+
+/*------------------------------------------------------------- fcntl */
+int
+fcntl (int fildes, int cmd, ...)
+{
+  int *guard;
+  int fd = 0;
+  IOTrace_packet iopkt;
+  long long_arg = 0;
+  int int_arg = 0;
+  int which_arg = F_ERROR_ARG;
+  va_list ap;
+  switch (cmd)
+    {
+    case F_DUPFD:
+    case TMP_F_DUPFD_CLOEXEC:
+    case F_SETFD:
+    case F_SETFL:
+    case F_SETOWN:
+    case F_SETSIG:
+    case F_SETLEASE:
+    case F_NOTIFY:
+    case F_SETLK:
+    case F_SETLKW:
+    case F_GETLK:
+      va_start (ap, cmd);
+      long_arg = va_arg (ap, long);
+      va_end (ap);
+      which_arg = F_LONG_ARG;
+      break;
+    case F_GETFD:
+    case F_GETFL:
+    case F_GETOWN:
+    case F_GETLEASE:
+    case F_GETSIG:
+      which_arg = F_VOID_ARG;
+      break;
+    }
+  if (NULL_PTR (fcntl))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    {
+      switch (which_arg)
+	{
+	case F_INT_ARG:
+	  return CALL_REAL (fcntl)(fildes, cmd, int_arg);
+	case F_LONG_ARG:
+	  return CALL_REAL (fcntl)(fildes, cmd, long_arg);
+	case F_VOID_ARG:
+	  return CALL_REAL (fcntl)(fildes, cmd);
+	case F_ERROR_ARG:
+	  Tprintf (0, "iotrace: ERROR: Unsupported fcntl command\n");
+	  return -1;
+	}
+      return -1;
+    }
+  if (cmd != F_DUPFD && cmd != TMP_F_DUPFD_CLOEXEC)
+    {
+      switch (which_arg)
+	{
+	case F_INT_ARG:
+	  return CALL_REAL (fcntl)(fildes, cmd, int_arg);
+	case F_LONG_ARG:
+	  return CALL_REAL (fcntl)(fildes, cmd, long_arg);
+	case F_VOID_ARG:
+	  return CALL_REAL (fcntl)(fildes, cmd);
+	case F_ERROR_ARG:
+	  Tprintf (0, "iotrace: ERROR: Unsupported fcntl command\n");
+	  return -1;
+	}
+      return -1;
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  switch (cmd)
+    {
+    case F_DUPFD:
+    case TMP_F_DUPFD_CLOEXEC:
+      fd = CALL_REAL (fcntl)(fildes, cmd, long_arg);
+      break;
+    }
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (fd != -1)
+    iopkt.iotype = OPEN_TRACE;
+  else
+    iopkt.iotype = OPEN_TRACE_ERROR;
+  iopkt.fd = fd;
+  iopkt.ofd = fildes;
+  iopkt.fstype = UNKNOWNFS_TYPE;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- openat */
+int
+openat (int fildes, const char *path, int oflag, ...)
+{
+  int *guard;
+  int fd;
+  void *packet;
+  IOTrace_packet *iopkt;
+  mode_t mode;
+  va_list ap;
+  size_t sz;
+  unsigned pktSize;
+
+  va_start (ap, oflag);
+  mode = va_arg (ap, mode_t);
+  va_end (ap);
+  if (NULL_PTR (openat))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (openat)(fildes, path, oflag, mode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (openat)(fildes, path, oflag, mode);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (fd != -1)
+	iopkt->iotype = OPEN_TRACE;
+      else
+	iopkt->iotype = OPEN_TRACE_ERROR;
+      iopkt->fd = fd;
+      iopkt->fstype = collector_fstype (path);
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: openat cannot allocate memory\n");
+      return -1;
+    }
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- creat */
+int
+creat (const char *path, mode_t mode)
+{
+  int *guard;
+  int fd;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (creat))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (creat)(path, mode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (creat)(path, mode);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (fd != -1)
+	iopkt->iotype = OPEN_TRACE;
+      else
+	iopkt->iotype = OPEN_TRACE_ERROR;
+      iopkt->fd = fd;
+      iopkt->fstype = collector_fstype (path);
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: creat cannot allocate memory\n");
+      return -1;
+    }
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- creat64 */
+#if WSIZE(32)
+int
+creat64 (const char *path, mode_t mode)
+{
+  int *guard;
+  int fd;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+
+  if (NULL_PTR (creat64))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (creat64)(path, mode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (creat64)(path, mode);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (fd != -1)
+	iopkt->iotype = OPEN_TRACE;
+      else
+	iopkt->iotype = OPEN_TRACE_ERROR;
+      iopkt->fd = fd;
+      iopkt->fstype = collector_fstype (path);
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: creat64 cannot allocate memory\n");
+      return -1;
+    }
+  POP_REENTRANCE (guard);
+  return fd;
+}
+#endif
+
+/*------------------------------------------------------------- mkstemp */
+int
+mkstemp (char *template)
+{
+  int *guard;
+  int fd;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (mkstemp))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || template == NULL)
+    return CALL_REAL (mkstemp)(template);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (mkstemp)(template);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (template);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (fd != -1)
+	iopkt->iotype = OPEN_TRACE;
+      else
+	iopkt->iotype = OPEN_TRACE_ERROR;
+      iopkt->fd = fd;
+      iopkt->fstype = collector_fstype (template);
+      collector_strncpy (&(iopkt->fname), template, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: mkstemp cannot allocate memory\n");
+      return -1;
+    }
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- mkstemps */
+int
+mkstemps (char *template, int slen)
+{
+  int *guard;
+  int fd;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (mkstemps))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || template == NULL)
+    return CALL_REAL (mkstemps)(template, slen);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (mkstemps)(template, slen);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (template);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (fd != -1)
+	iopkt->iotype = OPEN_TRACE;
+      else
+	iopkt->iotype = OPEN_TRACE_ERROR;
+      iopkt->fd = fd;
+      iopkt->fstype = collector_fstype (template);
+      collector_strncpy (&(iopkt->fname), template, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: mkstemps cannot allocate memory\n");
+      return -1;
+    }
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- close */
+int
+close (int fildes)
+{
+  int *guard;
+  int stat;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (close))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (close)(fildes);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  stat = CALL_REAL (close)(fildes);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return stat;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (stat == 0)
+    iopkt.iotype = CLOSE_TRACE;
+  else
+    iopkt.iotype = CLOSE_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return stat;
+}
+
+/*------------------------------------------------------------- fopen */
+// map interposed symbol versions
+#if ARCH(Intel) && WSIZE(32)
+
+static FILE*
+__collector_fopen_symver (FILE*(real_fopen) (), const char *filename, const char *mode);
+
+FILE*
+__collector_fopen_2_1 (const char *filename, const char *mode)
+{
+  if (NULL_PTR (fopen))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fopen_2_1@%p\n", CALL_REAL (fopen_2_1));
+  return __collector_fopen_symver (CALL_REAL (fopen_2_1), filename, mode);
+}
+
+FILE*
+__collector_fopen_2_0 (const char *filename, const char *mode)
+{
+  if (NULL_PTR (fopen))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fopen_2_0@%p\n", CALL_REAL (fopen_2_0));
+  return __collector_fopen_symver (CALL_REAL (fopen_2_0), filename, mode);
+}
+
+__asm__(".symver __collector_fopen_2_1,fopen@@GLIBC_2.1");
+__asm__(".symver __collector_fopen_2_0,fopen@GLIBC_2.0");
+
+#endif
+
+#if ARCH(Intel) && WSIZE(32)
+
+static FILE*
+__collector_fopen_symver (FILE*(real_fopen) (), const char *filename, const char *mode)
+{
+#else
+
+FILE*
+fopen (const char *filename, const char *mode)
+{
+#endif
+  int *guard;
+  FILE *fp = NULL;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (fopen))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || filename == NULL)
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_fopen) (filename, mode);
+#else
+      return CALL_REAL (fopen)(filename, mode);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+
+#if ARCH(Intel) && WSIZE(32)
+  fp = (real_fopen) (filename, mode);
+#else
+  fp = CALL_REAL (fopen)(filename, mode);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fp;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (filename);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (fp != NULL)
+	{
+	  iopkt->iotype = OPEN_TRACE;
+	  iopkt->fd = fileno (fp);
+	}
+      else
+	{
+	  iopkt->iotype = OPEN_TRACE_ERROR;
+	  iopkt->fd = -1;
+	}
+      iopkt->fstype = collector_fstype (filename);
+      collector_strncpy (&(iopkt->fname), filename, sz);
+
+#if ARCH(Intel) && WSIZE(32)
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK_ARG, &iopkt);
+#else
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+#endif
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: fopen cannot allocate memory\n");
+      return NULL;
+    }
+  POP_REENTRANCE (guard);
+  return fp;
+}
+
+/*------------------------------------------------------------- fclose */
+// map interposed symbol versions
+#if ARCH(Intel) && WSIZE(32)
+
+static int
+__collector_fclose_symver (int(real_fclose) (), FILE *stream);
+
+int
+__collector_fclose_2_1 (FILE *stream)
+{
+  if (NULL_PTR (fclose))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fclose_2_1@%p\n", CALL_REAL (fclose_2_1));
+  return __collector_fclose_symver (CALL_REAL (fclose_2_1), stream);
+}
+
+int
+__collector_fclose_2_0 (FILE *stream)
+{
+  if (NULL_PTR (fclose))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fclose_2_0@%p\n", CALL_REAL (fclose_2_0));
+  return __collector_fclose_symver (CALL_REAL (fclose_2_0), stream);
+}
+
+__asm__(".symver __collector_fclose_2_1,fclose@@GLIBC_2.1");
+__asm__(".symver __collector_fclose_2_0,fclose@GLIBC_2.0");
+
+#endif
+
+#if ARCH(Intel) && WSIZE(32)
+
+static int
+__collector_fclose_symver (int(real_fclose) (), FILE *stream)
+{
+#else
+
+int
+fclose (FILE *stream)
+{
+#endif
+  int *guard;
+  int stat;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fclose))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_fclose) (stream);
+#else
+      return CALL_REAL (fclose)(stream);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel) && WSIZE(32)
+  stat = (real_fclose) (stream);
+#else
+  stat = CALL_REAL (fclose)(stream);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return stat;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (stat == 0)
+    iopkt.iotype = CLOSE_TRACE;
+  else
+    iopkt.iotype = CLOSE_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+
+#if ARCH(Intel) && WSIZE(32)
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK_ARG, &iopkt);
+#else
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+#endif
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return stat;
+}
+
+/*------------------------------------------------------------- fflush */
+int
+fflush (FILE *stream)
+{
+  int *guard;
+  int stat;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fflush))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (fflush)(stream);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  stat = CALL_REAL (fflush)(stream);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return stat;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (stat == 0)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  if (stream != NULL)
+    iopkt.fd = fileno (stream);
+  else
+    iopkt.fd = -1;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return stat;
+}
+
+/*------------------------------------------------------------- fdopen */
+// map interposed symbol versions
+#if ARCH(Intel) && WSIZE(32)
+
+static FILE*
+__collector_fdopen_symver (FILE*(real_fdopen) (), int fildes, const char *mode);
+
+FILE*
+__collector_fdopen_2_1 (int fildes, const char *mode)
+{
+  if (NULL_PTR (fdopen))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fdopen_2_1@%p\n", CALL_REAL (fdopen_2_1));
+  return __collector_fdopen_symver (CALL_REAL (fdopen_2_1), fildes, mode);
+}
+
+FILE*
+__collector_fdopen_2_0 (int fildes, const char *mode)
+{
+  if (NULL_PTR (fdopen))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fdopen_2_0@%p\n", CALL_REAL (fdopen_2_0));
+  return __collector_fdopen_symver (CALL_REAL (fdopen_2_0), fildes, mode);
+}
+
+__asm__(".symver __collector_fdopen_2_1,fdopen@@GLIBC_2.1");
+__asm__(".symver __collector_fdopen_2_0,fdopen@GLIBC_2.0");
+
+#endif
+
+#if ARCH(Intel) && WSIZE(32)
+static FILE*
+__collector_fdopen_symver (FILE*(real_fdopen) (), int fildes, const char *mode)
+{
+#else
+FILE*
+fdopen (int fildes, const char *mode)
+{
+#endif
+  int *guard;
+  FILE *fp = NULL;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fdopen))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_fdopen) (fildes, mode);
+#else
+      return CALL_REAL (fdopen)(fildes, mode);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel) && WSIZE(32)
+  fp = (real_fdopen) (fildes, mode);
+#else
+  fp = CALL_REAL (fdopen)(fildes, mode);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fp;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (fp != NULL)
+    iopkt.iotype = OPEN_TRACE;
+  else
+    iopkt.iotype = OPEN_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.fstype = UNKNOWNFS_TYPE;
+#if ARCH(Intel) && WSIZE(32)
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK_ARG, &iopkt);
+#else
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+#endif
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return fp;
+}
+
+/*------------------------------------------------------------- dup */
+int
+dup (int fildes)
+{
+  int *guard;
+  int fd;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (dup))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (dup)(fildes);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (dup)(fildes);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (fd != -1)
+    iopkt.iotype = OPEN_TRACE;
+  else
+    iopkt.iotype = OPEN_TRACE_ERROR;
+
+  iopkt.fd = fd;
+  iopkt.ofd = fildes;
+  iopkt.fstype = UNKNOWNFS_TYPE;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- dup2 */
+int
+dup2 (int fildes, int fildes2)
+{
+  int *guard;
+  int fd;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (dup2))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (dup2)(fildes, fildes2);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (dup2)(fildes, fildes2);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (fd != -1)
+    iopkt.iotype = OPEN_TRACE;
+  else
+    iopkt.iotype = OPEN_TRACE_ERROR;
+  iopkt.fd = fd;
+  iopkt.ofd = fildes;
+  iopkt.fstype = UNKNOWNFS_TYPE;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- pipe */
+int
+pipe (int fildes[2])
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (pipe))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (pipe)(fildes);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (pipe)(fildes);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != -1)
+    iopkt.iotype = OPEN_TRACE;
+  else
+    iopkt.iotype = OPEN_TRACE_ERROR;
+  iopkt.fd = fildes[0];
+  iopkt.fstype = UNKNOWNFS_TYPE;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != -1)
+    iopkt.iotype = OPEN_TRACE;
+  else
+    iopkt.iotype = OPEN_TRACE_ERROR;
+  iopkt.fd = fildes[1];
+  iopkt.fstype = UNKNOWNFS_TYPE;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- socket */
+int
+socket (int domain, int type, int protocol)
+{
+  int *guard;
+  int fd;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (socket))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (socket)(domain, type, protocol);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  fd = CALL_REAL (socket)(domain, type, protocol);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return fd;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (fd != -1)
+    iopkt.iotype = OPEN_TRACE;
+  else
+    iopkt.iotype = OPEN_TRACE_ERROR;
+  iopkt.fd = fd;
+  iopkt.fstype = UNKNOWNFS_TYPE;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return fd;
+}
+
+/*------------------------------------------------------------- read */
+ssize_t
+read (int fildes, void *buf, size_t nbyte)
+{
+  int *guard;
+  ssize_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (read))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (read)(fildes, buf, nbyte);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (read)(fildes, buf, nbyte);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = READ_TRACE;
+  else
+    iopkt.iotype = READ_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- write */
+ssize_t
+write (int fildes, const void *buf, size_t nbyte)
+{
+  int *guard;
+  ssize_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (write))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (write)(fildes, buf, nbyte);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (write)(fildes, buf, nbyte);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = WRITE_TRACE;
+  else
+    iopkt.iotype = WRITE_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- readv */
+ssize_t
+readv (int fildes, const struct iovec *iov, int iovcnt)
+{
+  int *guard;
+  ssize_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (readv))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (readv)(fildes, iov, iovcnt);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (readv)(fildes, iov, iovcnt);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = READ_TRACE;
+  else
+    iopkt.iotype = READ_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- writev */
+ssize_t
+writev (int fildes, const struct iovec *iov, int iovcnt)
+{
+  int *guard;
+  ssize_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (writev))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (writev)(fildes, iov, iovcnt);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (writev)(fildes, iov, iovcnt);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = WRITE_TRACE;
+  else
+    iopkt.iotype = WRITE_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- fread */
+size_t
+fread (void *ptr, size_t size, size_t nitems, FILE *stream)
+{
+  int *guard;
+  size_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fread))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (fread)(ptr, size, nitems, stream);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (fread)(ptr, size, nitems, stream);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ferror (stream) == 0)
+    {
+      iopkt.iotype = READ_TRACE;
+      iopkt.nbyte = ret * size;
+    }
+  else
+    {
+      iopkt.iotype = READ_TRACE_ERROR;
+      iopkt.nbyte = 0;
+    }
+  iopkt.fd = fileno (stream);
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- fwrite */
+size_t
+fwrite (const void *ptr, size_t size, size_t nitems, FILE *stream)
+{
+  int *guard;
+  size_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fwrite))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (fwrite)(ptr, size, nitems, stream);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (fwrite)(ptr, size, nitems, stream);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ferror (stream) == 0)
+    {
+      iopkt.iotype = WRITE_TRACE;
+      iopkt.nbyte = ret * size;
+    }
+  else
+    {
+      iopkt.iotype = WRITE_TRACE_ERROR;
+      iopkt.nbyte = 0;
+    }
+  iopkt.fd = fileno (stream);
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- pread */
+#if ARCH(Intel) && WSIZE(32)
+// map interposed symbol versions
+static int
+__collector_pread_symver (int(real_pread) (), int fildes, void *buf, size_t nbyte, off_t offset);
+
+int
+__collector_pread_2_2 (int fildes, void *buf, size_t nbyte, off_t offset)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_pread_2_2@%p(fildes=%d, buf=%p, nbyte=%lld, offset=%lld)\n",
+	    CALL_REAL (pread_2_2), fildes, buf, (long long) nbyte, (long long) offset);
+  if (NULL_PTR (pread))
+    init_io_intf ();
+  return __collector_pread_symver (CALL_REAL (pread_2_2), fildes, buf, nbyte, offset);
+}
+
+int
+__collector_pread_2_1 (int fildes, void *buf, size_t nbyte, off_t offset)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_pread_2_1@%p(fildes=%d, buf=%p, nbyte=%lld, offset=%lld)\n",
+	    CALL_REAL (pread_2_1), fildes, buf, (long long) nbyte, (long long) offset);
+  if (NULL_PTR (pread))
+    init_io_intf ();
+  return __collector_pread_symver (CALL_REAL (pread_2_1), fildes, buf, nbyte, offset);
+}
+
+__asm__(".symver __collector_pread_2_2,pread@@GLIBC_2.2");
+__asm__(".symver __collector_pread_2_1,pread@GLIBC_2.1");
+
+static int
+__collector_pread_symver (int(real_pread) (), int fildes, void *buf, size_t nbyte, off_t offset)
+{
+#else /* ^ARCH(Intel) && WSIZE(32) */
+
+ssize_t
+pread (int fildes, void *buf, size_t nbyte, off_t offset)
+{
+#endif
+  int *guard;
+  ssize_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (pread))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_pread) (fildes, buf, nbyte, offset);
+#else
+      return CALL_REAL (pread)(fildes, buf, nbyte, offset);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel) && WSIZE(32)
+  ret = (real_pread) (fildes, buf, nbyte, offset);
+#else
+  ret = CALL_REAL (pread)(fildes, buf, nbyte, offset);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = READ_TRACE;
+  else
+    iopkt.iotype = READ_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- pwrite */
+#if ARCH(Intel) && WSIZE(32)
+// map interposed symbol versions
+static int
+__collector_pwrite_symver (int(real_pwrite) (), int fildes, const void *buf, size_t nbyte, off_t offset);
+
+int
+__collector_pwrite_2_2 (int fildes, const void *buf, size_t nbyte, off_t offset)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_pwrite_2_2@%p(fildes=%d, buf=%p, nbyte=%lld, offset=%lld)\n",
+	    CALL_REAL (pwrite_2_2), fildes, buf, (long long) nbyte, (long long) offset);
+  if (NULL_PTR (pwrite))
+    init_io_intf ();
+  return __collector_pwrite_symver (CALL_REAL (pwrite_2_2), fildes, buf, nbyte, offset);
+}
+
+int
+__collector_pwrite_2_1 (int fildes, const void *buf, size_t nbyte, off_t offset)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_pwrite_2_1@%p(fildes=%d, buf=%p, nbyte=%lld, offset=%lld)\n",
+	    CALL_REAL (pwrite_2_1), fildes, buf, (long long) nbyte, (long long) offset);
+  if (NULL_PTR (pwrite))
+    init_io_intf ();
+  return __collector_pwrite_symver (CALL_REAL (pwrite_2_1), fildes, buf, nbyte, offset);
+}
+
+__asm__(".symver __collector_pwrite_2_2,pwrite@@GLIBC_2.2");
+__asm__(".symver __collector_pwrite_2_1,pwrite@GLIBC_2.1");
+
+static int
+__collector_pwrite_symver (int(real_pwrite) (), int fildes, const void *buf, size_t nbyte, off_t offset)
+{
+#else /* ^ARCH(Intel) && WSIZE(32) */
+
+ssize_t
+pwrite (int fildes, const void *buf, size_t nbyte, off_t offset)
+{
+#endif /* ^ARCH(Intel) && WSIZE(32) */
+  int *guard;
+  ssize_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (pwrite))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_pwrite) (fildes, buf, nbyte, offset);
+#else
+      return CALL_REAL (pwrite)(fildes, buf, nbyte, offset);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel) && WSIZE(32)
+  ret = (real_pwrite) (fildes, buf, nbyte, offset);
+#else
+  ret = CALL_REAL (pwrite)(fildes, buf, nbyte, offset);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = WRITE_TRACE;
+  else
+    iopkt.iotype = WRITE_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- pwrite64 */
+#if ARCH(Intel) && WSIZE(32)
+// map interposed symbol versions
+static int
+__collector_pwrite64_symver (int(real_pwrite64) (), int fildes, const void *buf, size_t nbyte, off64_t offset);
+
+int
+__collector_pwrite64_2_2 (int fildes, const void *buf, size_t nbyte, off64_t offset)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_pwrite64_2_2@%p(fildes=%d, buf=%p, nbyte=%lld, offset=%lld)\n",
+	    CALL_REAL (pwrite64_2_2), fildes, buf, (long long) nbyte, (long long) offset);
+  if (NULL_PTR (pwrite64))
+    init_io_intf ();
+  return __collector_pwrite64_symver (CALL_REAL (pwrite64_2_2), fildes, buf, nbyte, offset);
+}
+
+int
+__collector_pwrite64_2_1 (int fildes, const void *buf, size_t nbyte, off64_t offset)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_pwrite64_2_1@%p(fildes=%d, buf=%p, nbyte=%lld, offset=%lld)\n",
+	    CALL_REAL (pwrite64_2_1), fildes, buf, (long long) nbyte, (long long) offset);
+  if (NULL_PTR (pwrite64))
+    init_io_intf ();
+  return __collector_pwrite64_symver (CALL_REAL (pwrite64_2_1), fildes, buf, nbyte, offset);
+}
+
+__asm__(".symver __collector_pwrite64_2_2,pwrite64@@GLIBC_2.2");
+__asm__(".symver __collector_pwrite64_2_1,pwrite64@GLIBC_2.1");
+
+static int
+__collector_pwrite64_symver (int(real_pwrite64) (), int fildes, const void *buf, size_t nbyte, off64_t offset)
+{
+#else /* ^ARCH(Intel) && WSIZE(32) */
+
+ssize_t
+pwrite64 (int fildes, const void *buf, size_t nbyte, off64_t offset)
+{
+#endif /* ^ARCH(Intel) && WSIZE(32) */
+  int *guard;
+  ssize_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (pwrite64))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_pwrite64) (fildes, buf, nbyte, offset);
+#else
+      return CALL_REAL (pwrite64)(fildes, buf, nbyte, offset);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel) && WSIZE(32)
+  ret = (real_pwrite64) (fildes, buf, nbyte, offset);
+#else
+  ret = CALL_REAL (pwrite64)(fildes, buf, nbyte, offset);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = WRITE_TRACE;
+  else
+    iopkt.iotype = WRITE_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- fgets */
+char*
+fgets (char *s, int n, FILE *stream)
+{
+  int *guard;
+  char *ptr;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fgets))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (fgets)(s, n, stream);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ptr = CALL_REAL (fgets)(s, n, stream);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ptr;
+    }
+  int error = errno;
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ptr != NULL)
+    {
+      iopkt.iotype = READ_TRACE;
+      iopkt.nbyte = collector_strlen (ptr);
+    }
+  else if (ptr == NULL && error != EAGAIN && error != EBADF && error != EINTR &&
+	   error != EIO && error != EOVERFLOW && error != ENOMEM && error != ENXIO)
+    {
+      iopkt.iotype = READ_TRACE;
+      iopkt.nbyte = 0;
+    }
+  else
+    iopkt.iotype = READ_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ptr;
+}
+
+/*------------------------------------------------------------- fputs */
+int
+fputs (const char *s, FILE *stream)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fputs))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (fputs)(s, stream);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (fputs)(s, stream);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != EOF)
+    {
+      iopkt.iotype = WRITE_TRACE;
+      iopkt.nbyte = ret;
+    }
+  else
+    {
+      iopkt.iotype = WRITE_TRACE_ERROR;
+      iopkt.nbyte = 0;
+    }
+  iopkt.fd = fileno (stream);
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- fputc */
+int
+fputc (int c, FILE *stream)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fputc))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (fputc)(c, stream);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (fputc)(c, stream);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != EOF)
+    {
+      iopkt.iotype = WRITE_TRACE;
+      iopkt.nbyte = ret;
+    }
+  else
+    {
+      iopkt.iotype = WRITE_TRACE_ERROR;
+      iopkt.nbyte = 0;
+    }
+  iopkt.fd = fileno (stream);
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- fprintf */
+int
+fprintf (FILE *stream, const char *format, ...)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  va_list ap;
+  va_start (ap, format);
+  if (NULL_PTR (fprintf))
+    init_io_intf ();
+  if (NULL_PTR (vfprintf))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (vfprintf)(stream, format, ap);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (vfprintf)(stream, format, ap);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = WRITE_TRACE;
+  else
+    iopkt.iotype = WRITE_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- vfprintf */
+int
+vfprintf (FILE *stream, const char *format, va_list ap)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (vfprintf))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (vfprintf)(stream, format, ap);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (vfprintf)(stream, format, ap);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret >= 0)
+    iopkt.iotype = WRITE_TRACE;
+  else
+    iopkt.iotype = WRITE_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+  iopkt.nbyte = ret;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- lseek */
+off_t
+lseek (int fildes, off_t offset, int whence)
+{
+  int *guard;
+  off_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (lseek))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (lseek)(fildes, offset, whence);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (lseek)(fildes, offset, whence);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != -1)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- llseek */
+offset_t
+llseek (int fildes, offset_t offset, int whence)
+{
+  int *guard;
+  offset_t ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (llseek))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (llseek)(fildes, offset, whence);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (llseek)(fildes, offset, whence);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != -1)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- chmod */
+int
+chmod (const char *path, mode_t mode)
+{
+  int *guard;
+  int ret;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (chmod))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (chmod)(path, mode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (chmod)(path, mode);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (ret != -1)
+	iopkt->iotype = OTHERIO_TRACE;
+      else
+	iopkt->iotype = OTHERIO_TRACE_ERROR;
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: chmod cannot allocate memory\n");
+      return 0;
+    }
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- access */
+int
+access (const char *path, int amode)
+{
+  int *guard;
+  int ret;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (access))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (access)(path, amode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (access)(path, amode);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (ret != -1)
+	iopkt->iotype = OTHERIO_TRACE;
+      else
+	iopkt->iotype = OTHERIO_TRACE_ERROR;
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: access cannot allocate memory\n");
+      return 0;
+    }
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- rename */
+int
+rename (const char *old, const char *new)
+{
+  int *guard;
+  int ret;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (rename))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || new == NULL)
+    return CALL_REAL (rename)(old, new);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (rename)(old, new);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (new);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (ret != -1)
+	iopkt->iotype = OTHERIO_TRACE;
+      else
+	iopkt->iotype = OTHERIO_TRACE_ERROR;
+      collector_strncpy (&(iopkt->fname), new, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: rename cannot allocate memory\n");
+      return 0;
+    }
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- mkdir */
+int
+mkdir (const char *path, mode_t mode)
+{
+  int *guard;
+  int ret;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (mkdir))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (mkdir)(path, mode);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (mkdir)(path, mode);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (ret != -1)
+	iopkt->iotype = OTHERIO_TRACE;
+      else
+	iopkt->iotype = OTHERIO_TRACE_ERROR;
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: mkdir cannot allocate memory\n");
+      return 0;
+    }
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- getdents */
+int
+getdents (int fildes, struct dirent *buf, size_t nbyte)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (getdents))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (getdents)(fildes, buf, nbyte);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (getdents)(fildes, buf, nbyte);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != -1)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- unlink */
+int
+unlink (const char *path)
+{
+  int *guard;
+  int ret;
+  void *packet;
+  IOTrace_packet *iopkt;
+  size_t sz;
+  unsigned pktSize;
+  if (NULL_PTR (unlink))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || path == NULL)
+    return CALL_REAL (unlink)(path);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (unlink)(path);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  sz = collector_strlen (path);
+  pktSize = sizeof (IOTrace_packet) + sz;
+  pktSize = collector_align_pktsize (pktSize);
+  Tprintf (DBG_LT1, "iotrace allocating %u from io_heap\n", pktSize);
+  packet = collector_interface->allocCSize (io_heap, pktSize, 1);
+  if (packet != NULL)
+    {
+      iopkt = (IOTrace_packet *) packet;
+      collector_memset (iopkt, 0, pktSize);
+      iopkt->comm.tsize = pktSize;
+      iopkt->comm.tstamp = grnt;
+      iopkt->requested = reqt;
+      if (ret != -1)
+	iopkt->iotype = OTHERIO_TRACE;
+      else
+	iopkt->iotype = OTHERIO_TRACE_ERROR;
+      collector_strncpy (&(iopkt->fname), path, sz);
+      iopkt->comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt->comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+      collector_interface->writeDataRecord (io_hndl, (Common_packet*) iopkt);
+      collector_interface->freeCSize (io_heap, packet, pktSize);
+    }
+  else
+    {
+      Tprintf (0, "iotrace: ERROR: unlink cannot allocate memory\n");
+      return 0;
+    }
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- fseek */
+int
+fseek (FILE *stream, long offset, int whence)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fseek))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (fseek)(stream, offset, whence);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (fseek)(stream, offset, whence);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != -1)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- rewind */
+void
+rewind (FILE *stream)
+{
+  int *guard;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (rewind))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    {
+      CALL_REAL (rewind)(stream);
+      return;
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  CALL_REAL (rewind)(stream);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  iopkt.iotype = OTHERIO_TRACE;
+  iopkt.fd = fileno (stream);
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+}
+
+/*------------------------------------------------------------- ftell */
+long
+ftell (FILE *stream)
+{
+  int *guard;
+  long ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (ftell))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    return CALL_REAL (ftell)(stream);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (ftell)(stream);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret != -1)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- fgetpos */
+// map interposed symbol versions
+#if ARCH(Intel) && WSIZE(32)
+static int
+__collector_fgetpos_symver (int(real_fgetpos) (), FILE *stream, fpos_t *pos);
+
+int
+__collector_fgetpos_2_2 (FILE *stream, fpos_t *pos)
+{
+  if (NULL_PTR (fgetpos))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fgetpos_2_2@%p\n", CALL_REAL (fgetpos_2_2));
+  return __collector_fgetpos_symver (CALL_REAL (fgetpos_2_2), stream, pos);
+}
+
+int
+__collector_fgetpos_2_0 (FILE *stream, fpos_t *pos)
+{
+  if (NULL_PTR (fgetpos))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fgetpos_2_0@%p\n", CALL_REAL (fgetpos_2_0));
+  return __collector_fgetpos_symver (CALL_REAL (fgetpos_2_0), stream, pos);
+}
+
+__asm__(".symver __collector_fgetpos_2_2,fgetpos@@GLIBC_2.2");
+__asm__(".symver __collector_fgetpos_2_0,fgetpos@GLIBC_2.0");
+#endif
+
+#if ARCH(Intel) && WSIZE(32)
+
+static int
+__collector_fgetpos_symver (int(real_fgetpos) (), FILE *stream, fpos_t *pos)
+{
+#else
+int
+fgetpos (FILE *stream, fpos_t *pos)
+{
+#endif
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fgetpos))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_fgetpos) (stream, pos);
+#else
+      return CALL_REAL (fgetpos)(stream, pos);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel) && WSIZE(32)
+  ret = (real_fgetpos) (stream, pos);
+#else
+  ret = CALL_REAL (fgetpos)(stream, pos);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret == 0)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+
+#if ARCH(Intel) && WSIZE(32)
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK_ARG, &iopkt);
+#else
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+#endif
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+#if WSIZE(32)
+/*------------------------------------------------------------- fgetpos64 */
+#if ARCH(Intel)
+// map interposed symbol versions
+
+static int
+__collector_fgetpos64_symver (int(real_fgetpos64) (), FILE *stream, fpos64_t *pos);
+
+int
+__collector_fgetpos64_2_2 (FILE *stream, fpos64_t *pos)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_fgetpos64_2_2@%p(stream=%p, pos=%p)\n",
+	    CALL_REAL (fgetpos64_2_2), stream, pos);
+  if (NULL_PTR (fgetpos64))
+    init_io_intf ();
+  return __collector_fgetpos64_symver (CALL_REAL (fgetpos64_2_2), stream, pos);
+}
+
+int
+__collector_fgetpos64_2_1 (FILE *stream, fpos64_t *pos)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_fgetpos64_2_1@%p(stream=%p, pos=%p)\n",
+	    CALL_REAL (fgetpos64_2_1), stream, pos);
+  if (NULL_PTR (fgetpos64))
+    init_io_intf ();
+  return __collector_fgetpos64_symver (CALL_REAL (fgetpos64_2_1), stream, pos);
+}
+
+__asm__(".symver __collector_fgetpos64_2_2,fgetpos64@@GLIBC_2.2");
+__asm__(".symver __collector_fgetpos64_2_1,fgetpos64@GLIBC_2.1");
+
+static int
+__collector_fgetpos64_symver (int(real_fgetpos64) (), FILE *stream, fpos64_t *pos)
+{
+#else
+int
+fgetpos64 (FILE *stream, fpos64_t *pos)
+{
+#endif
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fgetpos64))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    {
+#if ARCH(Intel)
+      return (real_fgetpos64) (stream, pos);
+#else
+      return CALL_REAL (fgetpos64)(stream, pos);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel)
+  ret = (real_fgetpos64) (stream, pos);
+#else
+  ret = CALL_REAL (fgetpos64)(stream, pos);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret == 0)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+#if ARCH(Intel)
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK_ARG, &iopkt);
+#else
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+#endif
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+#endif
+
+/*------------------------------------------------------------- fsetpos */
+// map interposed symbol versions
+#if ARCH(Intel) && WSIZE(32)
+static int
+__collector_fsetpos_symver (int(real_fsetpos) (), FILE *stream, const fpos_t *pos);
+
+int
+__collector_fsetpos_2_2 (FILE *stream, const fpos_t *pos)
+{
+  if (NULL_PTR (fsetpos))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fsetpos_2_2@%p\n", CALL_REAL (fsetpos_2_2));
+  return __collector_fsetpos_symver (CALL_REAL (fsetpos_2_2), stream, pos);
+}
+
+int
+__collector_fsetpos_2_0 (FILE *stream, const fpos_t *pos)
+{
+  if (NULL_PTR (fsetpos))
+    init_io_intf ();
+  TprintfT (DBG_LTT, "iotrace: __collector_fsetpos_2_0@%p\n", CALL_REAL (fsetpos_2_0));
+  return __collector_fsetpos_symver (CALL_REAL (fsetpos_2_0), stream, pos);
+}
+
+__asm__(".symver __collector_fsetpos_2_2,fsetpos@@GLIBC_2.2");
+__asm__(".symver __collector_fsetpos_2_0,fsetpos@GLIBC_2.0");
+#endif
+
+#if ARCH(Intel) && WSIZE(32)
+
+static int
+__collector_fsetpos_symver (int(real_fsetpos) (), FILE *stream, const fpos_t *pos)
+{
+#else
+int
+fsetpos (FILE *stream, const fpos_t *pos)
+{
+#endif
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fsetpos))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_fsetpos) (stream, pos);
+#else
+      return CALL_REAL (fsetpos)(stream, pos);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel) && WSIZE(32)
+  ret = (real_fsetpos) (stream, pos);
+#else
+  ret = CALL_REAL (fsetpos)(stream, pos);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret == 0)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+#if ARCH(Intel) && WSIZE(32)
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK_ARG, &iopkt);
+#else
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+#endif
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+#if WSIZE(32)
+/*------------------------------------------------------------- fsetpos64 */
+#if ARCH(Intel)
+// map interposed symbol versions
+static int
+__collector_fsetpos64_symver (int(real_fsetpos64) (), FILE *stream, const fpos64_t *pos);
+
+int
+__collector_fsetpos64_2_2 (FILE *stream, const fpos64_t *pos)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_fsetpos64_2_2@%p(stream=%p, pos=%p)\n",
+	    CALL_REAL (fsetpos64_2_2), stream, pos);
+  if (NULL_PTR (fsetpos64))
+    init_io_intf ();
+  return __collector_fsetpos64_symver (CALL_REAL (fsetpos64_2_2), stream, pos);
+}
+
+int
+__collector_fsetpos64_2_1 (FILE *stream, const fpos64_t *pos)
+{
+  TprintfT (DBG_LTT, "iotrace: __collector_fsetpos64_2_1@%p(stream=%p, pos=%p)\n",
+	    CALL_REAL (fsetpos64_2_1), stream, pos);
+  if (NULL_PTR (fsetpos64))
+    init_io_intf ();
+  return __collector_fsetpos64_symver (CALL_REAL (fsetpos64_2_1), stream, pos);
+}
+
+__asm__(".symver __collector_fsetpos64_2_2,fsetpos64@@GLIBC_2.2");
+__asm__(".symver __collector_fsetpos64_2_1,fsetpos64@GLIBC_2.1");
+
+static int
+__collector_fsetpos64_symver (int(real_fsetpos64) (), FILE *stream, const fpos64_t *pos)
+{
+#else
+int
+fsetpos64 (FILE *stream, const fpos64_t *pos)
+{
+#endif
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fsetpos64))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard) || stream == NULL)
+    {
+#if ARCH(Intel) && WSIZE(32)
+      return (real_fsetpos64) (stream, pos);
+#else
+      return CALL_REAL (fsetpos64)(stream, pos);
+#endif
+    }
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+#if ARCH(Intel) && WSIZE(32)
+  ret = (real_fsetpos64) (stream, pos);
+#else
+  ret = CALL_REAL (fsetpos64)(stream, pos);
+#endif
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret == 0)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fileno (stream);
+#if ARCH(Intel)
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK_ARG, &iopkt);
+#else
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+#endif
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+#endif
+
+/*------------------------------------------------------------- fsync */
+int
+fsync (int fildes)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (fsync))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (fsync)(fildes);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (fsync)(fildes);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret == 0)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- readdir */
+struct dirent*
+readdir (DIR *dirp)
+{
+  int *guard;
+  struct dirent *ptr;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (readdir))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (readdir)(dirp);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ptr = CALL_REAL (readdir)(dirp);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ptr;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof ( IOTrace_packet));
+  iopkt.comm.tsize = sizeof ( IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ptr != NULL)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ptr;
+}
+
+/*------------------------------------------------------------- flock */
+int
+flock (int fd, int operation)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (flock))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (flock)(fd, operation);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (flock)(fd, operation);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret == 0)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fd;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}
+
+/*------------------------------------------------------------- lockf */
+int
+lockf (int fildes, int function, off_t size)
+{
+  int *guard;
+  int ret;
+  IOTrace_packet iopkt;
+  if (NULL_PTR (lockf))
+    init_io_intf ();
+  if (CHCK_REENTRANCE (guard))
+    return CALL_REAL (lockf)(fildes, function, size);
+  PUSH_REENTRANCE (guard);
+  hrtime_t reqt = gethrtime ();
+  ret = CALL_REAL (lockf)(fildes, function, size);
+  if (RECHCK_REENTRANCE (guard))
+    {
+      POP_REENTRANCE (guard);
+      return ret;
+    }
+  hrtime_t grnt = gethrtime ();
+  collector_memset (&iopkt, 0, sizeof (IOTrace_packet));
+  iopkt.comm.tsize = sizeof (IOTrace_packet);
+  iopkt.comm.tstamp = grnt;
+  iopkt.requested = reqt;
+  if (ret == 0)
+    iopkt.iotype = OTHERIO_TRACE;
+  else
+    iopkt.iotype = OTHERIO_TRACE_ERROR;
+  iopkt.fd = fildes;
+  iopkt.comm.frinfo = collector_interface->getFrameInfo (io_hndl, iopkt.comm.tstamp, FRINFO_FROM_STACK, &iopkt);
+  collector_interface->writeDataRecord (io_hndl, (Common_packet*) & iopkt);
+  POP_REENTRANCE (guard);
+  return ret;
+}