/
dtrace-wrapper.h
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/
dtrace-wrapper.h
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/*
* %CopyrightBegin%
*
* Copyright Dustin Sallings, Michal Ptaszek, Scott Lystig Fritchie 2011-2021.
* 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%
*/
#ifndef __DTRACE_WRAPPER_H
#define __DTRACE_WRAPPER_H
#define DTRACE_TERM_BUF_SIZE 256
/*
* Some varieties of SystemTap macros do not like statically-sized
* char[N] buffers. (For example, CentOS 6's macros.)
* So, we'll play a game to humor them.
*
* The code necessary to play nice with CentOS 6's SystemTap looks
* stupid to a C programmer's eyes, so we hide the ugliness with this
* macro, which expands:
*
* DTRACE_CHARBUF(proc_name, 64);
*
* to become:
*
* char proc_name_BUFFER[64], *proc_name = proc_name_BUFFER;
*/
#define DTRACE_CHARBUF(name, size) \
char name##_BUFFER[size], *name = name##_BUFFER
#define DTRACE_CHARBUF_NAME(name) name##_BUFFER
#if defined(USE_DYNAMIC_TRACE) && defined(USE_VM_PROBES)
#ifdef __cplusplus
extern "C++" {
/* Generated erlang_dtrace.h contains #include <sys/sdt.h>, which
* has C++ code requiring C++ linkage. However beam_asm.hpp includes
* global.h with C linkage, and compilation fails, because <sdt.h>
* uses C++ templates when __cplusplus is defined.
*/
#include "erlang_dtrace.h"
}
#else
#include "erlang_dtrace.h"
#endif
#define DTRACE_ENABLED(name) \
erlang_##name##_enabled()
#define DTRACE0(name) \
erlang_##name()
#define DTRACE1(name, a0) \
erlang_##name(a0)
#define DTRACE2(name, a0, a1) \
erlang_##name((a0), (a1))
#define DTRACE3(name, a0, a1, a2) \
erlang_##name((a0), (a1), (a2))
#define DTRACE4(name, a0, a1, a2, a3) \
erlang_##name((a0), (a1), (a2), (a3))
#define DTRACE5(name, a0, a1, a2, a3, a4) \
erlang_##name((a0), (a1), (a2), (a3), (a4))
#define DTRACE6(name, a0, a1, a2, a3, a4, a5) \
erlang_##name((a0), (a1), (a2), (a3), (a4), (a5))
#define DTRACE7(name, a0, a1, a2, a3, a4, a5, a6) \
erlang_##name((a0), (a1), (a2), (a3), (a4), (a5), (a6))
#define DTRACE10(name, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9) \
erlang_##name((a0), (a1), (a2), (a3), (a4), (a5), (a6), (a7), (a8), (a9))
#define DTRACE11(name, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10) \
erlang_##name((a0), (a1), (a2), (a3), (a4), (a5), (a6), (a7), (a8), (a9), (a10))
#if defined(_SDT_PROBE) && !defined(STAP_PROBE11)
/* SLF: This is Ubuntu 11-style SystemTap hackery */
/* workaround for missing STAP macro */
#define STAP_PROBE11(provider,name,arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9,arg10,arg11) \
_SDT_PROBE(provider, name, 11, \
(arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9,arg10,arg11))
#define _SDT_ASM_OPERANDS_11(arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9,arg10,arg11) \
_SDT_ASM_OPERANDS_10(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9,arg10), \
_SDT_ARG(11, arg11)
#endif
#ifdef STAP_PROBE_ADDR
/* SLF: This is CentOS 5-style SystemTap hackery */
/* SystemTap compat mode cannot support 11 args. We'll ignore the 11th */
#define STAP_PROBE11(provider,probe,parm1,parm2,parm3,parm4,parm5,parm6,parm7,parm8,parm9,parm10,parm11) \
STAP_PROBE10(provider,probe,(parm1),(parm2),(parm3),(parm4),(parm5),(parm6),(parm7),(parm8),(parm9),(parm10))
#endif /* STAP_PROBE_ADDR */
#else /* USE_DYNAMIC_TRACE && USE_VM_PROBES */
/* Render all macros to do nothing */
#define DTRACE_ENABLED(name) 0
#define DTRACE0(name) do {} while (0)
#define DTRACE1(name, a0) do {} while (0)
#define DTRACE2(name, a0, a1) do {} while (0)
#define DTRACE3(name, a0, a1, a2) do {} while (0)
#define DTRACE4(name, a0, a1, a2, a3) do {} while (0)
#define DTRACE5(name, a0, a1, a2, a3, a4) do {} while (0)
#define DTRACE6(name, a0, a1, a2, a3, a4, a5) do {} while (0)
#define DTRACE7(name, a0, a1, a2, a3, a4, a5, a6) do {} while (0)
#define DTRACE10(name, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9) \
do {} while (0)
#define DTRACE11(name, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10) \
do {} while (0)
#endif /* USE_DYNAMIC_TRACE && USE_VM_PROBES */
#endif /* __DTRACE_WRAPPER_H */