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/* -*- linux-c -*-
* Print Functions
* Copyright (C) 2012-2018 Red Hat Inc.
*
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*/
#ifndef _STAPDYN_PRINT_C_
#define _STAPDYN_PRINT_C_
#ifdef STP_BULKMODE
#error "Bulk mode output (percpu files) not supported for --runtime=dyninst"
#endif
#include "transport.c"
#include "vsprintf.c"
static void _stp_print_kernel_info(char *sname, char *vstr, int ctx, int num_probes)
{
// nah...
}
static int _stp_print_init(void)
{
/* Since 'print_buf' is now in the context structure (see
* common_probe_context.h), there isn't anything to do for
* regular print buffers. */
return 0;
}
static void _stp_print_cleanup(void)
{
/* Since 'print_buf' is now in the context structure (see
* common_probe_context.h), there isn't anything to free for
* it. */
}
static inline void _stp_print_flush(void)
{
_stp_dyninst_transport_write();
return;
}
static void * _stp_reserve_bytes (int numbytes)
{
return _stp_dyninst_transport_reserve_bytes(numbytes);
}
#ifndef STP_MAXBINARYARGS
#define STP_MAXBINARYARGS 127
#endif
static void _stp_unreserve_bytes (int numbytes)
{
_stp_dyninst_transport_unreserve_bytes(numbytes);
return;
}
/** Write 64-bit args directly into the output stream.
* This function takes a variable number of 64-bit arguments
* and writes them directly into the output stream. Marginally faster
* than doing the same in _stp_vsnprintf().
* @sa _stp_vsnprintf()
*/
static void _stp_print_binary (int num, ...)
{
va_list vargs;
int i;
int64_t *args;
if (unlikely(num > STP_MAXBINARYARGS))
num = STP_MAXBINARYARGS;
args = _stp_reserve_bytes(num * sizeof(int64_t));
if (likely(args != NULL)) {
va_start(vargs, num);
for (i = 0; i < num; i++) {
args[i] = va_arg(vargs, int64_t);
}
va_end(vargs);
}
}
static void _stp_printf (const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
_stp_vsnprintf(NULL, 0, fmt, args);
va_end(args);
}
static void _stp_print (const char *str)
{
_stp_printf("%s", str);
}
static void _stp_print_char (const char c)
{
char *p = _stp_reserve_bytes(1);;
if (p) {
*p = c;
}
}
/* libdw includes stdbool.h which defines bool as _Bool which clashes with
* stap definition of _stp_print_trylock_irqsave. */
#undef bool
/* no-op stub synchronization */
static bool _stp_print_trylock_irqsave(unsigned long *flags)
{
(void) flags;
return true;
}
static void _stp_print_unlock_irqrestore(unsigned long *flags)
{
(void) flags;
}
#endif /* _STAPDYN_PRINT_C_ */
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