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/*
* %CopyrightBegin%
*
* Copyright Scott Lystig Fritchie 2011-2012. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/*
* Purpose: Dynamically loadable NIF library for DTrace
*/
#include "erl_nif.h"
#include "config.h"
#include "sys.h"
#include "dtrace-wrapper.h"
#if defined(USE_DYNAMIC_TRACE) && (defined(USE_DTRACE) || defined(USE_SYSTEMTAP))
#define HAVE_USE_DTRACE 1
#endif
void dtrace_nifenv_str(ErlNifEnv *env, char *process_buf);
void get_string_maybe(ErlNifEnv *env, const ERL_NIF_TERM term, char **ptr, char *buf, int bufsiz);
#ifdef HAVE_USE_DTRACE
ERL_NIF_TERM erl_nif_user_trace_s1(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
ERL_NIF_TERM erl_nif_user_trace_i4s4(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
#endif
#ifdef VALGRIND
# include <valgrind/memcheck.h>
#endif
#ifdef __GNUC__
# define INLINE __inline__
#else
# define INLINE
#endif
#define MESSAGE_BUFSIZ 1024
/* NIF interface declarations */
static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info);
/* The NIFs: */
static ERL_NIF_TERM available(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM user_trace_s1(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM user_trace_i4s4(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM user_trace_n(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ErlNifFunc nif_funcs[] = {
{"available", 0, available},
{"user_trace_s1", 1, user_trace_s1},
{"user_trace_i4s4", 9, user_trace_i4s4},
{"user_trace_n", 10, user_trace_n}
};
ERL_NIF_INIT(dyntrace, nif_funcs, load, NULL, NULL, NULL)
static ERL_NIF_TERM atom_true;
static ERL_NIF_TERM atom_false;
static ERL_NIF_TERM atom_error;
static ERL_NIF_TERM atom_not_available;
static ERL_NIF_TERM atom_badarg;
static ERL_NIF_TERM atom_ok;
static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info)
{
atom_true = enif_make_atom(env,"true");
atom_false = enif_make_atom(env,"false");
atom_error = enif_make_atom(env,"error");
atom_not_available = enif_make_atom(env,"not_available");
atom_badarg = enif_make_atom(env,"badarg");
atom_ok = enif_make_atom(env,"ok");
return 0;
}
static ERL_NIF_TERM available(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
#ifdef HAVE_USE_DTRACE
return atom_true;
#else
return atom_false;
#endif
}
static ERL_NIF_TERM user_trace_s1(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
#ifdef HAVE_USE_DTRACE
return erl_nif_user_trace_s1(env, argc, argv);
#else
return atom_error;
#endif
}
static ERL_NIF_TERM user_trace_i4s4(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
#ifdef HAVE_USE_DTRACE
return erl_nif_user_trace_i4s4(env, argc, argv);
#else
return atom_error;
#endif
}
static ERL_NIF_TERM user_trace_n(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
#ifdef HAVE_USE_DTRACE
return erl_nif_user_trace_n(env, argc, argv);
#else
return atom_error;
#endif
}
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