pfmlib_os_linux_v3.c

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/*
 * pfmlib_os_linux_v3.c: Perfmon3 API syscalls
 *
 * Copyright (c) 2008 Google, Inc
 * Contributed by Stephane Eranian <eranian@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE /* for getline */
#endif
#include <sys/types.h>
#include <stdint.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <syscall.h>
#include <perfmon/perfmon.h>
 
#include <perfmon/pfmlib.h>
#include "pfmlib_priv.h"
 
/*
 * v3.x interface
 */
#define PFM_pfm_create          (_pfmlib_get_sys_base()+0)
#define PFM_pfm_write           (_pfmlib_get_sys_base()+1)
#define PFM_pfm_read            (_pfmlib_get_sys_base()+2)
#define PFM_pfm_attach          (_pfmlib_get_sys_base()+3)
#define PFM_pfm_set_state       (_pfmlib_get_sys_base()+4)
#define PFM_pfm_create_sets     (_pfmlib_get_sys_base()+5)
#define PFM_pfm_getinfo_sets        (_pfmlib_get_sys_base()+6)
 
/*
 * perfmon v3 interface
 */
int
//pfm_create(int flags, pfarg_sinfo_t *sif, char *name, void *smpl_arg, size_t smpl_size)
pfm_create(int flags, pfarg_sinfo_t *sif, ...)
{
    va_list ap;
    char *name = NULL;
    void *smpl_arg = NULL;
    size_t smpl_size = 0;
    int ret;
 
    if (_pfmlib_major_version < 3) {
        errno = ENOSYS;
        return -1;
    }
 
    if (flags & PFM_FL_SMPL_FMT)
        va_start(ap, sif);
    
    if (flags & PFM_FL_SMPL_FMT) {
        name = va_arg(ap, char *);
        smpl_arg = va_arg(ap, void *);
        smpl_size = va_arg(ap, size_t);
    }
 
    ret = (int)syscall(PFM_pfm_create, flags, sif, name, smpl_arg, smpl_size);
 
    if (flags & PFM_FL_SMPL_FMT)
        va_end(ap);
 
    return ret;
}
 
int
pfm_write(int fd, int flags, int type, void *pms, size_t sz)
{
    if (_pfmlib_major_version < 3)
        return -ENOSYS;
    return (int)syscall(PFM_pfm_write, fd, flags, type, pms, sz);
}
 
int
pfm_read(int fd, int flags, int type, void *pms, size_t sz)
{
    if (_pfmlib_major_version < 3)
        return -ENOSYS;
    return (int)syscall(PFM_pfm_read, fd, flags, type, pms, sz);
}
 
int
pfm_create_sets(int fd, int flags, pfarg_set_desc_t *setd, size_t sz)
{
    if (_pfmlib_major_version < 3)
        return -ENOSYS;
    return (int)syscall(PFM_pfm_create_sets, fd, flags, setd, sz);
}
 
int
pfm_getinfo_sets(int fd, int flags, pfarg_set_info_t *info, size_t sz)
{
    if (_pfmlib_major_version < 3)
        return -ENOSYS;
    return (int)syscall(PFM_pfm_getinfo_sets, fd, flags, info, sz);
}
 
int
pfm_attach(int fd, int flags, int target)
{
    if (_pfmlib_major_version < 3)
        return -ENOSYS;
    return (int)syscall(PFM_pfm_attach, fd, flags, target);
}
 
int
pfm_set_state(int fd, int flags, int state)
{
    if (_pfmlib_major_version < 3)
        return -ENOSYS;
    return (int)syscall(PFM_pfm_set_state, fd, flags, state);
}