X-Git-Url: http://git.lttng.org/?p=lttng-ust.git;a=blobdiff_plain;f=include%2Flttng%2Ftracepoint.h;h=1cf02188f37f78eafb1f61a32b56e99f748b697e;hp=63759a20ee3da5f7a7e0beb6f08219c8567abe55;hb=HEAD;hpb=1a20609484df56e378318d65f07f39dcd8ec1db2 diff --git a/include/lttng/tracepoint.h b/include/lttng/tracepoint.h index 63759a20..9342c5c1 100644 --- a/include/lttng/tracepoint.h +++ b/include/lttng/tracepoint.h @@ -1,460 +1,809 @@ -#ifndef _LTTNG_TRACEPOINT_H -#define _LTTNG_TRACEPOINT_H +// SPDX-FileCopyrightText: 2011-2012 Mathieu Desnoyers +// +// SPDX-License-Identifier: MIT -/* - * Copyright 2011-2012 - Mathieu Desnoyers - * - * 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 _LTTNG_UST_TRACEPOINT_H +#define _LTTNG_UST_TRACEPOINT_H #include #include #include #include +#include +#include +#include + #include +#include #include /* for dlopen */ #include /* for memset */ +#include + #include /* for sdt */ #include +#include +#include + +#if (defined(__cplusplus) && (__cplusplus <= 199711L)) +#error "C++11 support is required to build tracepoints and providers as C++" +#endif + +#define LTTNG_UST_TRACEPOINT_NAME_LEN_MAX 256 #ifdef LTTNG_UST_HAVE_SDT_INTEGRATION -#define SDT_USE_VARIADIC +/* + * Instead of using SDT_USE_VARIADIC from 'sys/sdt.h', use our own namespaced + * macros since the instrumented application might already have included + * 'sys/sdt.h' without variadic support. + */ #include + +#define LTTNG_UST__SDT_NARG(...) \ + LTTNG_UST___SDT_NARG(__VA_ARGS__, 12,11,10,9,8,7,6,5,4,3,2,1,0) + +#define LTTNG_UST___SDT_NARG(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12, N, ...) N + +#define LTTNG_UST__SDT_PROBE_N(provider, name, N, ...) \ + _SDT_PROBE(provider, name, N, (__VA_ARGS__)) + +#define LTTNG_UST_STAP_PROBEV(provider, name, ...) \ + LTTNG_UST__SDT_PROBE_N(provider, name, LTTNG_UST__SDT_NARG(0, ##__VA_ARGS__), ##__VA_ARGS__) + #else -#define STAP_PROBEV(...) +#define LTTNG_UST_STAP_PROBEV(...) #endif #ifdef __cplusplus extern "C" { #endif -#define tracepoint(provider, name, ...) \ - do { \ - STAP_PROBEV(provider, name, ## __VA_ARGS__); \ - if (caa_unlikely(__tracepoint_##provider##___##name.state)) \ - __tracepoint_cb_##provider##___##name(__VA_ARGS__); \ +#define lttng_ust_tracepoint_enabled(provider, name) \ + caa_unlikely(CMM_LOAD_SHARED(lttng_ust_tracepoint_##provider##___##name.state)) + +#define lttng_ust_do_tracepoint(provider, name, ...) \ + lttng_ust_tracepoint_cb_##provider##___##name(__VA_ARGS__) + +#define lttng_ust_tracepoint(provider, name, ...) \ + do { \ + LTTNG_UST_STAP_PROBEV(provider, name, ## __VA_ARGS__); \ + if (lttng_ust_tracepoint_enabled(provider, name)) \ + lttng_ust_do_tracepoint(provider, name, __VA_ARGS__); \ } while (0) -#define TP_ARGS(...) __VA_ARGS__ +#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__ /* - * TP_ARGS takes tuples of type, argument separated by a comma. + * LTTNG_UST_TP_ARGS takes tuples of type, argument separated by a comma. * It can take up to 10 tuples (which means that less than 10 tuples is * fine too). * Each tuple is also separated by a comma. */ -#define __TP_COMBINE_TOKENS(_tokena, _tokenb) \ +#define LTTNG_UST___TP_COMBINE_TOKENS(_tokena, _tokenb) \ _tokena##_tokenb -#define _TP_COMBINE_TOKENS(_tokena, _tokenb) \ - __TP_COMBINE_TOKENS(_tokena, _tokenb) -#define __TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \ +#define LTTNG_UST__TP_COMBINE_TOKENS(_tokena, _tokenb) \ + LTTNG_UST___TP_COMBINE_TOKENS(_tokena, _tokenb) +#define LTTNG_UST___TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \ _tokena##_tokenb##_tokenc -#define _TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \ - __TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) -#define __TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \ +#define LTTNG_UST__TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \ + LTTNG_UST___TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) +#define LTTNG_UST___TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \ _tokena##_tokenb##_tokenc##_tokend -#define _TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \ - __TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) +#define LTTNG_UST__TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \ + LTTNG_UST___TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) /* - * _TP_EXVAR* extract the var names. - * _TP_EXVAR1 and _TP_EXDATA_VAR1 are needed for -std=c99. + * LTTNG_UST__TP_EXVAR* extract the var names. + * LTTNG_UST__TP_EXVAR1 and LTTNG_UST__TP_EXDATA_VAR1 are needed for -std=c99. */ -#define _TP_EXVAR0() -#define _TP_EXVAR1(a) -#define _TP_EXVAR2(a,b) b -#define _TP_EXVAR4(a,b,c,d) b,d -#define _TP_EXVAR6(a,b,c,d,e,f) b,d,f -#define _TP_EXVAR8(a,b,c,d,e,f,g,h) b,d,f,h -#define _TP_EXVAR10(a,b,c,d,e,f,g,h,i,j) b,d,f,h,j -#define _TP_EXVAR12(a,b,c,d,e,f,g,h,i,j,k,l) b,d,f,h,j,l -#define _TP_EXVAR14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) b,d,f,h,j,l,n -#define _TP_EXVAR16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) b,d,f,h,j,l,n,p -#define _TP_EXVAR18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) b,d,f,h,j,l,n,p,r -#define _TP_EXVAR20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) b,d,f,h,j,l,n,p,r,t - -#define _TP_EXDATA_VAR0() __tp_data -#define _TP_EXDATA_VAR1(a) __tp_data -#define _TP_EXDATA_VAR2(a,b) __tp_data,b -#define _TP_EXDATA_VAR4(a,b,c,d) __tp_data,b,d -#define _TP_EXDATA_VAR6(a,b,c,d,e,f) __tp_data,b,d,f -#define _TP_EXDATA_VAR8(a,b,c,d,e,f,g,h) __tp_data,b,d,f,h -#define _TP_EXDATA_VAR10(a,b,c,d,e,f,g,h,i,j) __tp_data,b,d,f,h,j -#define _TP_EXDATA_VAR12(a,b,c,d,e,f,g,h,i,j,k,l) __tp_data,b,d,f,h,j,l -#define _TP_EXDATA_VAR14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) __tp_data,b,d,f,h,j,l,n -#define _TP_EXDATA_VAR16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) __tp_data,b,d,f,h,j,l,n,p -#define _TP_EXDATA_VAR18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) __tp_data,b,d,f,h,j,l,n,p,r -#define _TP_EXDATA_VAR20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) __tp_data,b,d,f,h,j,l,n,p,r,t +#define LTTNG_UST__TP_EXVAR0() +#define LTTNG_UST__TP_EXVAR1(a) +#define LTTNG_UST__TP_EXVAR2(a,b) b +#define LTTNG_UST__TP_EXVAR4(a,b,c,d) b,d +#define LTTNG_UST__TP_EXVAR6(a,b,c,d,e,f) b,d,f +#define LTTNG_UST__TP_EXVAR8(a,b,c,d,e,f,g,h) b,d,f,h +#define LTTNG_UST__TP_EXVAR10(a,b,c,d,e,f,g,h,i,j) b,d,f,h,j +#define LTTNG_UST__TP_EXVAR12(a,b,c,d,e,f,g,h,i,j,k,l) b,d,f,h,j,l +#define LTTNG_UST__TP_EXVAR14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) b,d,f,h,j,l,n +#define LTTNG_UST__TP_EXVAR16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) b,d,f,h,j,l,n,p +#define LTTNG_UST__TP_EXVAR18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) b,d,f,h,j,l,n,p,r +#define LTTNG_UST__TP_EXVAR20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) b,d,f,h,j,l,n,p,r,t + +#define LTTNG_UST__TP_EXDATA_VAR0() __tp_data +#define LTTNG_UST__TP_EXDATA_VAR1(a) __tp_data +#define LTTNG_UST__TP_EXDATA_VAR2(a,b) __tp_data,b +#define LTTNG_UST__TP_EXDATA_VAR4(a,b,c,d) __tp_data,b,d +#define LTTNG_UST__TP_EXDATA_VAR6(a,b,c,d,e,f) __tp_data,b,d,f +#define LTTNG_UST__TP_EXDATA_VAR8(a,b,c,d,e,f,g,h) __tp_data,b,d,f,h +#define LTTNG_UST__TP_EXDATA_VAR10(a,b,c,d,e,f,g,h,i,j) __tp_data,b,d,f,h,j +#define LTTNG_UST__TP_EXDATA_VAR12(a,b,c,d,e,f,g,h,i,j,k,l) __tp_data,b,d,f,h,j,l +#define LTTNG_UST__TP_EXDATA_VAR14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) __tp_data,b,d,f,h,j,l,n +#define LTTNG_UST__TP_EXDATA_VAR16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) __tp_data,b,d,f,h,j,l,n,p +#define LTTNG_UST__TP_EXDATA_VAR18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) __tp_data,b,d,f,h,j,l,n,p,r +#define LTTNG_UST__TP_EXDATA_VAR20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) __tp_data,b,d,f,h,j,l,n,p,r,t /* - * _TP_EXPROTO* extract tuples of type, var. - * _TP_EXPROTO1 and _TP_EXDATA_PROTO1 are needed for -std=c99. + * LTTNG_UST__TP_EXPROTO* extract tuples of type, var. + * LTTNG_UST__TP_EXPROTO1 and LTTNG_UST__TP_EXDATA_PROTO1 are needed for -std=c99. */ -#define _TP_EXPROTO0() void -#define _TP_EXPROTO1(a) void -#define _TP_EXPROTO2(a,b) a b -#define _TP_EXPROTO4(a,b,c,d) a b,c d -#define _TP_EXPROTO6(a,b,c,d,e,f) a b,c d,e f -#define _TP_EXPROTO8(a,b,c,d,e,f,g,h) a b,c d,e f,g h -#define _TP_EXPROTO10(a,b,c,d,e,f,g,h,i,j) a b,c d,e f,g h,i j -#define _TP_EXPROTO12(a,b,c,d,e,f,g,h,i,j,k,l) a b,c d,e f,g h,i j,k l -#define _TP_EXPROTO14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) a b,c d,e f,g h,i j,k l,m n -#define _TP_EXPROTO16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) a b,c d,e f,g h,i j,k l,m n,o p -#define _TP_EXPROTO18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) a b,c d,e f,g h,i j,k l,m n,o p,q r -#define _TP_EXPROTO20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) a b,c d,e f,g h,i j,k l,m n,o p,q r,s t - -#define _TP_EXDATA_PROTO0() void *__tp_data -#define _TP_EXDATA_PROTO1(a) void *__tp_data -#define _TP_EXDATA_PROTO2(a,b) void *__tp_data,a b -#define _TP_EXDATA_PROTO4(a,b,c,d) void *__tp_data,a b,c d -#define _TP_EXDATA_PROTO6(a,b,c,d,e,f) void *__tp_data,a b,c d,e f -#define _TP_EXDATA_PROTO8(a,b,c,d,e,f,g,h) void *__tp_data,a b,c d,e f,g h -#define _TP_EXDATA_PROTO10(a,b,c,d,e,f,g,h,i,j) void *__tp_data,a b,c d,e f,g h,i j -#define _TP_EXDATA_PROTO12(a,b,c,d,e,f,g,h,i,j,k,l) void *__tp_data,a b,c d,e f,g h,i j,k l -#define _TP_EXDATA_PROTO14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) void *__tp_data,a b,c d,e f,g h,i j,k l,m n -#define _TP_EXDATA_PROTO16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p -#define _TP_EXDATA_PROTO18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p,q r -#define _TP_EXDATA_PROTO20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p,q r,s t +#define LTTNG_UST__TP_EXPROTO0() void +#define LTTNG_UST__TP_EXPROTO1(a) void +#define LTTNG_UST__TP_EXPROTO2(a,b) a b +#define LTTNG_UST__TP_EXPROTO4(a,b,c,d) a b,c d +#define LTTNG_UST__TP_EXPROTO6(a,b,c,d,e,f) a b,c d,e f +#define LTTNG_UST__TP_EXPROTO8(a,b,c,d,e,f,g,h) a b,c d,e f,g h +#define LTTNG_UST__TP_EXPROTO10(a,b,c,d,e,f,g,h,i,j) a b,c d,e f,g h,i j +#define LTTNG_UST__TP_EXPROTO12(a,b,c,d,e,f,g,h,i,j,k,l) a b,c d,e f,g h,i j,k l +#define LTTNG_UST__TP_EXPROTO14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) a b,c d,e f,g h,i j,k l,m n +#define LTTNG_UST__TP_EXPROTO16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) a b,c d,e f,g h,i j,k l,m n,o p +#define LTTNG_UST__TP_EXPROTO18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) a b,c d,e f,g h,i j,k l,m n,o p,q r +#define LTTNG_UST__TP_EXPROTO20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) a b,c d,e f,g h,i j,k l,m n,o p,q r,s t + +#define LTTNG_UST__TP_EXDATA_PROTO0() void *__tp_data +#define LTTNG_UST__TP_EXDATA_PROTO1(a) void *__tp_data +#define LTTNG_UST__TP_EXDATA_PROTO2(a,b) void *__tp_data,a b +#define LTTNG_UST__TP_EXDATA_PROTO4(a,b,c,d) void *__tp_data,a b,c d +#define LTTNG_UST__TP_EXDATA_PROTO6(a,b,c,d,e,f) void *__tp_data,a b,c d,e f +#define LTTNG_UST__TP_EXDATA_PROTO8(a,b,c,d,e,f,g,h) void *__tp_data,a b,c d,e f,g h +#define LTTNG_UST__TP_EXDATA_PROTO10(a,b,c,d,e,f,g,h,i,j) void *__tp_data,a b,c d,e f,g h,i j +#define LTTNG_UST__TP_EXDATA_PROTO12(a,b,c,d,e,f,g,h,i,j,k,l) void *__tp_data,a b,c d,e f,g h,i j,k l +#define LTTNG_UST__TP_EXDATA_PROTO14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) void *__tp_data,a b,c d,e f,g h,i j,k l,m n +#define LTTNG_UST__TP_EXDATA_PROTO16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p +#define LTTNG_UST__TP_EXDATA_PROTO18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p,q r +#define LTTNG_UST__TP_EXDATA_PROTO20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p,q r,s t /* Preprocessor trick to count arguments. Inspired from sdt.h. */ -#define _TP_NARGS(...) __TP_NARGS(__VA_ARGS__, 20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0) -#define __TP_NARGS(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,_19,_20, N, ...) N -#define _TP_PROTO_N(N, ...) _TP_PARAMS(_TP_COMBINE_TOKENS(_TP_EXPROTO, N)(__VA_ARGS__)) -#define _TP_VAR_N(N, ...) _TP_PARAMS(_TP_COMBINE_TOKENS(_TP_EXVAR, N)(__VA_ARGS__)) -#define _TP_DATA_PROTO_N(N, ...) _TP_PARAMS(_TP_COMBINE_TOKENS(_TP_EXDATA_PROTO, N)(__VA_ARGS__)) -#define _TP_DATA_VAR_N(N, ...) _TP_PARAMS(_TP_COMBINE_TOKENS(_TP_EXDATA_VAR, N)(__VA_ARGS__)) -#define _TP_ARGS_PROTO(...) _TP_PROTO_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__) -#define _TP_ARGS_VAR(...) _TP_VAR_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__) -#define _TP_ARGS_DATA_PROTO(...) _TP_DATA_PROTO_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__) -#define _TP_ARGS_DATA_VAR(...) _TP_DATA_VAR_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__) -#define _TP_PARAMS(...) __VA_ARGS__ +#define LTTNG_UST__TP_NARGS(...) LTTNG_UST___TP_NARGS(__VA_ARGS__, 20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0) +#define LTTNG_UST___TP_NARGS(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,_19,_20, N, ...) N +#define LTTNG_UST__TP_PROTO_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXPROTO, N)(__VA_ARGS__)) +#define LTTNG_UST__TP_VAR_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXVAR, N)(__VA_ARGS__)) +#define LTTNG_UST__TP_DATA_PROTO_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXDATA_PROTO, N)(__VA_ARGS__)) +#define LTTNG_UST__TP_DATA_VAR_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXDATA_VAR, N)(__VA_ARGS__)) +#define LTTNG_UST__TP_ARGS_PROTO(...) LTTNG_UST__TP_PROTO_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__) +#define LTTNG_UST__TP_ARGS_VAR(...) LTTNG_UST__TP_VAR_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__) +#define LTTNG_UST__TP_ARGS_DATA_PROTO(...) LTTNG_UST__TP_DATA_PROTO_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__) +#define LTTNG_UST__TP_ARGS_DATA_VAR(...) LTTNG_UST__TP_DATA_VAR_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__) +#define LTTNG_UST__TP_PARAMS(...) __VA_ARGS__ + +/* + * sizeof(#_provider) - 1 : length of the provider string (excluding \0). + * sizeof(#_name) - 1 : length of the name string (excluding \0). + * + 1 : separator between provider and event name. + * + * Upper bound (inclusive) is LTTNG_UST_TRACEPOINT_NAME_LEN_MAX - 1 to + * account for \0. + * + * The comparison is: + * left hand side: sizeof(#_provider) - 1 + sizeof(#_name) - 1 + 1 + * right hand side: LTTNG_UST_TRACEPOINT_NAME_LEN_MAX - 1 + * operator: <= (inclusive) + * Simplified in the code below. + */ +#define lttng_ust_tracepoint_validate_name_len(_provider, _name) \ + lttng_ust_static_assert(sizeof(#_provider) + sizeof(#_name) <= LTTNG_UST_TRACEPOINT_NAME_LEN_MAX, \ + "Tracepoint name length is too long", \ + Tracepoint_name_length_is_too_long) /* * The tracepoint cb is marked always inline so we can distinguish * between caller's ip addresses within the probe using the return * address. */ -#define _DECLARE_TRACEPOINT(_provider, _name, ...) \ -extern struct lttng_ust_tracepoint __tracepoint_##_provider##___##_name; \ -static inline __attribute__((always_inline, unused)) lttng_ust_notrace \ -void __tracepoint_cb_##_provider##___##_name(_TP_ARGS_PROTO(__VA_ARGS__)); \ +#define LTTNG_UST__DECLARE_TRACEPOINT(_provider, _name, ...) \ +extern struct lttng_ust_tracepoint lttng_ust_tracepoint_##_provider##___##_name \ + LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY; \ +static inline \ +void lttng_ust_tracepoint_cb_##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(__VA_ARGS__)) \ + __attribute__((always_inline, unused)) lttng_ust_notrace; \ static \ -void __tracepoint_cb_##_provider##___##_name(_TP_ARGS_PROTO(__VA_ARGS__)) \ +void lttng_ust_tracepoint_cb_##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(__VA_ARGS__)) \ { \ - struct lttng_ust_tracepoint_probe *__tp_probe; \ + struct lttng_ust_tracepoint_probe *__tp_probe; \ \ - if (caa_unlikely(!TP_RCU_LINK_TEST())) \ + if (caa_unlikely(!LTTNG_UST_TP_RCU_LINK_TEST())) \ return; \ - tp_rcu_read_lock_bp(); \ - __tp_probe = tp_rcu_dereference_bp(__tracepoint_##_provider##___##_name.probes); \ + lttng_ust_tp_rcu_read_lock(); \ + __tp_probe = lttng_ust_tp_rcu_dereference(lttng_ust_tracepoint_##_provider##___##_name.probes); \ if (caa_unlikely(!__tp_probe)) \ goto end; \ do { \ void (*__tp_cb)(void) = __tp_probe->func; \ void *__tp_data = __tp_probe->data; \ \ - URCU_FORCE_CAST(void (*)(_TP_ARGS_DATA_PROTO(__VA_ARGS__)), __tp_cb) \ - (_TP_ARGS_DATA_VAR(__VA_ARGS__)); \ + URCU_FORCE_CAST(void (*)(LTTNG_UST__TP_ARGS_DATA_PROTO(__VA_ARGS__)), __tp_cb) \ + (LTTNG_UST__TP_ARGS_DATA_VAR(__VA_ARGS__)); \ } while ((++__tp_probe)->func); \ end: \ - tp_rcu_read_unlock_bp(); \ + lttng_ust_tp_rcu_read_unlock(); \ } \ -static inline lttng_ust_notrace \ -void __tracepoint_register_##_provider##___##_name(char *name, \ - void (*func)(void), void *data); \ static inline \ -void __tracepoint_register_##_provider##___##_name(char *name, \ +void lttng_ust_tracepoint_register_##_provider##___##_name(char *provider_name, char *event_name, \ + void (*func)(void), void *data) \ + lttng_ust_notrace; \ +static inline \ +void lttng_ust_tracepoint_register_##_provider##___##_name(char *provider_name, char *event_name, \ void (*func)(void), void *data) \ { \ - __tracepoint_probe_register(name, func, data, \ - __tracepoint_##_provider##___##_name.signature); \ + lttng_ust_tracepoint_provider_register(provider_name, event_name, func, data, \ + lttng_ust_tracepoint_##_provider##___##_name.signature); \ } \ -static inline lttng_ust_notrace \ -void __tracepoint_unregister_##_provider##___##_name(char *name, \ - void (*func)(void), void *data); \ static inline \ -void __tracepoint_unregister_##_provider##___##_name(char *name, \ +void lttng_ust_tracepoint_unregister_##_provider##___##_name(char *provider_name, char *event_name, \ + void (*func)(void), void *data) \ + lttng_ust_notrace; \ +static inline \ +void lttng_ust_tracepoint_unregister_##_provider##___##_name(char *provider_name, char *event_name, \ void (*func)(void), void *data) \ { \ - __tracepoint_probe_unregister(name, func, data); \ + lttng_ust_tracepoint_provider_unregister(provider_name, event_name, func, data); \ } -extern int __tracepoint_probe_register(const char *name, void (*func)(void), - void *data, const char *signature); -extern int __tracepoint_probe_unregister(const char *name, void (*func)(void), - void *data); +/* + * Registration of tracepoint provider probe functions with + * lttng_ust_tracepoint_provider_register, unregistration with + * lttng_ust_tracepoint_provider_unregister. + */ +int lttng_ust_tracepoint_provider_register(const char *provider_name, const char *event_name, + void (*func)(void), void *data, const char *signature); +int lttng_ust_tracepoint_provider_unregister(const char *provider_name, const char *event_name, + void (*func)(void), void *data); + +/* + * Registration of tracepoint instrumentation modules with lttng_ust_tracepoint_module_register, + * unregistration with lttng_ust_tracepoint_module_unregister. + */ +int lttng_ust_tracepoint_module_register(struct lttng_ust_tracepoint * const *tracepoints_start, + int tracepoints_count); +int lttng_ust_tracepoint_module_unregister(struct lttng_ust_tracepoint * const *tracepoints_start); /* * tracepoint dynamic linkage handling (callbacks). Hidden visibility: * shared across objects in a module/main executable. + * + * IMPORTANT: this structure is part of the ABI between instrumented + * applications and UST. Fields need to be only added at the end, never + * reordered, never removed. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. */ struct lttng_ust_tracepoint_dlopen { + uint32_t struct_size; + void *liblttngust_handle; - int (*tracepoint_register_lib)(struct lttng_ust_tracepoint * const *tracepoints_start, + int (*lttng_ust_tracepoint_module_register)(struct lttng_ust_tracepoint * const *tracepoints_start, int tracepoints_count); - int (*tracepoint_unregister_lib)(struct lttng_ust_tracepoint * const *tracepoints_start); -#ifndef _LGPL_SOURCE - void (*rcu_read_lock_sym_bp)(void); - void (*rcu_read_unlock_sym_bp)(void); - void *(*rcu_dereference_sym_bp)(void *p); -#endif -}; + int (*lttng_ust_tracepoint_module_unregister)(struct lttng_ust_tracepoint * const *tracepoints_start); + void (*rcu_read_lock_sym)(void); + void (*rcu_read_unlock_sym)(void); + void *(*rcu_dereference_sym)(void *p); -extern struct lttng_ust_tracepoint_dlopen tracepoint_dlopen; + /* End of base ABI. Fields below should be used after checking struct_size. */ +}; -#if defined(TRACEPOINT_DEFINE) || defined(TRACEPOINT_CREATE_PROBES) +extern struct lttng_ust_tracepoint_dlopen lttng_ust_tracepoint_dlopen; +extern struct lttng_ust_tracepoint_dlopen *lttng_ust_tracepoint_dlopen_ptr; /* * These weak symbols, the constructor, and destructor take care of * registering only _one_ instance of the tracepoints per shared-ojbect * (or for the whole main program). */ -int __tracepoint_registered +int lttng_ust_tracepoint_registered __attribute__((weak, visibility("hidden"))); -int __tracepoint_ptrs_registered +int lttng_ust_tracepoint_ptrs_registered __attribute__((weak, visibility("hidden"))); -struct lttng_ust_tracepoint_dlopen tracepoint_dlopen +struct lttng_ust_tracepoint_dlopen lttng_ust_tracepoint_dlopen + __attribute__((weak, visibility("hidden"))) = { + .struct_size = sizeof(struct lttng_ust_tracepoint_dlopen), +}; +/* + * Deal with gcc O1 optimisation issues with weak hidden symbols. gcc + * 4.8 and prior does not have the same behavior for symbol scoping on + * 32-bit powerpc depending on the object size: symbols for objects of 8 + * bytes or less have the same address throughout a module, whereas they + * have different addresses between compile units for objects larger + * than 8 bytes. Add this pointer indirection to ensure that the symbol + * scoping match that of the other weak hidden symbols found in this + * header. + */ +struct lttng_ust_tracepoint_dlopen *lttng_ust_tracepoint_dlopen_ptr + __attribute__((weak, visibility("hidden"))); + +/* + * Tracepoint dynamic linkage handling (callbacks). Hidden visibility: shared + * across objects in a module/main executable. The callbacks are used to + * control and check if the destructors should be executed. + * + * IMPORTANT: this structure is part of the ABI between instrumented + * applications and UST. Fields need to be only added at the end, never + * reordered, never removed. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. + */ +struct lttng_ust_tracepoint_destructors_syms { + uint32_t struct_size; + + void (*tracepoint_disable_destructors)(void); + int (*tracepoint_get_destructors_state)(void); + + /* End of base ABI. Fields below should be used after checking struct_size. */ +}; + +extern struct lttng_ust_tracepoint_destructors_syms lttng_ust_tracepoint_destructors_syms; +extern struct lttng_ust_tracepoint_destructors_syms *lttng_ust_tracepoint_destructors_syms_ptr; + +struct lttng_ust_tracepoint_destructors_syms lttng_ust_tracepoint_destructors_syms + __attribute__((weak, visibility("hidden"))) = { + .struct_size = sizeof(struct lttng_ust_tracepoint_destructors_syms), +}; +struct lttng_ust_tracepoint_destructors_syms *lttng_ust_tracepoint_destructors_syms_ptr __attribute__((weak, visibility("hidden"))); +static inline void tracepoint_disable_destructors(void) +{ + if (!lttng_ust_tracepoint_dlopen_ptr) + lttng_ust_tracepoint_dlopen_ptr = <tng_ust_tracepoint_dlopen; + if (!lttng_ust_tracepoint_destructors_syms_ptr) + lttng_ust_tracepoint_destructors_syms_ptr = <tng_ust_tracepoint_destructors_syms; + if (lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle + && lttng_ust_tracepoint_destructors_syms_ptr->tracepoint_disable_destructors) + lttng_ust_tracepoint_destructors_syms_ptr->tracepoint_disable_destructors(); +} + #ifndef _LGPL_SOURCE -static inline void lttng_ust_notrace -__tracepoint__init_urcu_sym(void); static inline void -__tracepoint__init_urcu_sym(void) +lttng_ust_tracepoint__init_urcu_sym(void) + lttng_ust_notrace; +static inline void +lttng_ust_tracepoint__init_urcu_sym(void) { + if (!lttng_ust_tracepoint_dlopen_ptr) + lttng_ust_tracepoint_dlopen_ptr = <tng_ust_tracepoint_dlopen; /* * Symbols below are needed by tracepoint call sites and probe * providers. */ - if (!tracepoint_dlopen.rcu_read_lock_sym_bp) - tracepoint_dlopen.rcu_read_lock_sym_bp = + if (!lttng_ust_tracepoint_dlopen_ptr->rcu_read_lock_sym) + lttng_ust_tracepoint_dlopen_ptr->rcu_read_lock_sym = URCU_FORCE_CAST(void (*)(void), - dlsym(tracepoint_dlopen.liblttngust_handle, - "tp_rcu_read_lock_bp")); - if (!tracepoint_dlopen.rcu_read_unlock_sym_bp) - tracepoint_dlopen.rcu_read_unlock_sym_bp = + dlsym(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle, + "lttng_ust_tp_rcu_read_lock")); + if (!lttng_ust_tracepoint_dlopen_ptr->rcu_read_unlock_sym) + lttng_ust_tracepoint_dlopen_ptr->rcu_read_unlock_sym = URCU_FORCE_CAST(void (*)(void), - dlsym(tracepoint_dlopen.liblttngust_handle, - "tp_rcu_read_unlock_bp")); - if (!tracepoint_dlopen.rcu_dereference_sym_bp) - tracepoint_dlopen.rcu_dereference_sym_bp = + dlsym(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle, + "lttng_ust_tp_rcu_read_unlock")); + if (!lttng_ust_tracepoint_dlopen_ptr->rcu_dereference_sym) + lttng_ust_tracepoint_dlopen_ptr->rcu_dereference_sym = URCU_FORCE_CAST(void *(*)(void *p), - dlsym(tracepoint_dlopen.liblttngust_handle, - "tp_rcu_dereference_sym_bp")); + dlsym(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle, + "lttng_ust_tp_rcu_dereference_sym")); } #else -static inline void lttng_ust_notrace -__tracepoint__init_urcu_sym(void); static inline void -__tracepoint__init_urcu_sym(void) +lttng_ust_tracepoint__init_urcu_sym(void) + lttng_ust_notrace; +static inline void +lttng_ust_tracepoint__init_urcu_sym(void) +{ +} +#endif + +/* + * Use getenv() directly and bypass lttng-ust helper functions + * because we may not have access to lttng-ust shared libraries. + */ +#ifdef LTTNG_UST_DEBUG +static inline +bool lttng_ust_tracepoint_logging_debug_enabled(void) +{ + return true; +} +#else /* #ifdef LTTNG_UST_DEBUG */ +static inline +bool lttng_ust_tracepoint_logging_debug_enabled(void) { + return getenv("LTTNG_UST_DEBUG"); +} +#endif /* #ifdef LTTNG_UST_DEBUG */ + +#ifdef LTTNG_UST_ABORT_ON_CRITICAL +static inline +bool lttng_ust_tracepoint_logging_abort_on_critical_enabled(void) +{ + return true; +} +#else /* #ifdef LTTNG_UST_ABORT_ON_CRITICAL */ +static inline +bool lttng_ust_tracepoint_logging_abort_on_critical_enabled(void) +{ + return getenv("LTTNG_UST_ABORT_ON_CRITICAL"); } #endif -static void lttng_ust_notrace __attribute__((constructor)) -__tracepoints__init(void); +#define LTTNG_UST_TRACEPOINT_THIS_IP \ + ({ __label__ here; here: &&here; }) + +static void +lttng_ust_tracepoints_print_disabled_message(void) +{ + if (lttng_ust_tracepoint_logging_debug_enabled()) + fprintf(stderr, "lttng-ust-tracepoint [%ld]: Critical: dlopen() failed to find '%s', tracepoints in this binary won't be registered. " + "(at addr=%p in %s() at " __FILE__ ":" lttng_ust_stringify(__LINE__) ")\n", + (long) getpid(), + LTTNG_UST_TRACEPOINT_LIB_SONAME, + LTTNG_UST_TRACEPOINT_THIS_IP, + __func__); + if (lttng_ust_tracepoint_logging_abort_on_critical_enabled()) + abort(); +} + +static void +lttng_ust__tracepoints__init(void) + lttng_ust_notrace __attribute__((constructor(LTTNG_UST_CONSTRUCTOR_PRIO))); static void -__tracepoints__init(void) +lttng_ust__tracepoints__init(void) { - if (__tracepoint_registered++) + if (lttng_ust_tracepoint_registered++) { + if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle) + return; + lttng_ust_tracepoint__init_urcu_sym(); return; + } - if (!tracepoint_dlopen.liblttngust_handle) - tracepoint_dlopen.liblttngust_handle = - dlopen("liblttng-ust-tracepoint.so.0", RTLD_NOW | RTLD_GLOBAL); - if (!tracepoint_dlopen.liblttngust_handle) + if (!lttng_ust_tracepoint_dlopen_ptr) + lttng_ust_tracepoint_dlopen_ptr = <tng_ust_tracepoint_dlopen; + if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle) + lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle = + dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME, RTLD_NOW | RTLD_GLOBAL); + if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle) { + lttng_ust_tracepoints_print_disabled_message(); return; - __tracepoint__init_urcu_sym(); + } + lttng_ust_tracepoint__init_urcu_sym(); } -static void lttng_ust_notrace __attribute__((destructor)) -__tracepoints__destroy(void); static void -__tracepoints__destroy(void) +lttng_ust__tracepoints__destroy(void) + lttng_ust_notrace __attribute__((destructor(LTTNG_UST_CONSTRUCTOR_PRIO))); +static void +lttng_ust__tracepoints__destroy(void) { int ret; - if (--__tracepoint_registered) + if (--lttng_ust_tracepoint_registered) return; - if (tracepoint_dlopen.liblttngust_handle && !__tracepoint_ptrs_registered) { - ret = dlclose(tracepoint_dlopen.liblttngust_handle); - if (ret) { - fprintf(stderr, "Error (%d) in dlclose\n", ret); - abort(); - } - memset(&tracepoint_dlopen, 0, sizeof(tracepoint_dlopen)); + if (!lttng_ust_tracepoint_dlopen_ptr) + lttng_ust_tracepoint_dlopen_ptr = <tng_ust_tracepoint_dlopen; + if (!lttng_ust_tracepoint_destructors_syms_ptr) + lttng_ust_tracepoint_destructors_syms_ptr = <tng_ust_tracepoint_destructors_syms; + if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle) + return; + if (lttng_ust_tracepoint_ptrs_registered) + return; + /* + * Lookup if destructors must be executed using the new method. + */ + if (lttng_ust_tracepoint_destructors_syms_ptr->tracepoint_get_destructors_state + && !lttng_ust_tracepoint_destructors_syms_ptr->tracepoint_get_destructors_state()) { + /* + * The tracepoint_get_destructors_state symbol was found with + * dlsym but its returned value is 0 meaning that destructors + * must not be executed. + */ + return; + } + ret = dlclose(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle); + if (ret) { + fprintf(stderr, "Error (%d) in dlclose\n", ret); + abort(); } + memset(lttng_ust_tracepoint_dlopen_ptr, 0, sizeof(*lttng_ust_tracepoint_dlopen_ptr)); } +#if LTTNG_UST_COMPAT_API(0) +# if defined(TRACEPOINT_DEFINE) && !defined(LTTNG_UST_TRACEPOINT_DEFINE) +# define LTTNG_UST_TRACEPOINT_DEFINE +# endif +#endif /* #if LTTNG_UST_COMPAT_API(0) */ + +#if LTTNG_UST_COMPAT_API(0) +#define tracepoint lttng_ust_tracepoint +#define do_tracepoint lttng_ust_do_tracepoint +#define tracepoint_enabled lttng_ust_tracepoint_enabled +#define TP_ARGS LTTNG_UST_TP_ARGS +#endif /* #if LTTNG_UST_COMPAT_API(0) */ + +#ifdef __cplusplus +} #endif -#ifdef TRACEPOINT_DEFINE +#endif /* _LTTNG_UST_TRACEPOINT_H */ + +/* The following declarations must be outside re-inclusion protection. */ + +#ifdef LTTNG_UST_TRACEPOINT_DEFINE + +#ifndef _LTTNG_UST_TRACEPOINT_DEFINE_ONCE +#define _LTTNG_UST_TRACEPOINT_DEFINE_ONCE + +#ifdef __cplusplus +extern "C" { +#endif /* * These weak symbols, the constructor, and destructor take care of * registering only _one_ instance of the tracepoints per shared-ojbect * (or for the whole main program). */ -extern struct lttng_ust_tracepoint * const __start___tracepoints_ptrs[] +extern struct lttng_ust_tracepoint * const __start_lttng_ust_tracepoints_ptrs[] __attribute__((weak, visibility("hidden"))); -extern struct lttng_ust_tracepoint * const __stop___tracepoints_ptrs[] +extern struct lttng_ust_tracepoint * const __stop_lttng_ust_tracepoints_ptrs[] __attribute__((weak, visibility("hidden"))); /* - * When TRACEPOINT_PROBE_DYNAMIC_LINKAGE is defined, we do not emit a + * When LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE is defined, we do not emit a * unresolved symbol that requires the provider to be linked in. When - * TRACEPOINT_PROBE_DYNAMIC_LINKAGE is not defined, we emit an + * LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE is not defined, we emit an * unresolved symbol that depends on having the provider linked in, * otherwise the linker complains. This deals with use of static * libraries, ensuring that the linker does not remove the provider * object from the executable. */ -#ifdef TRACEPOINT_PROBE_DYNAMIC_LINKAGE -#define _TRACEPOINT_UNDEFINED_REF(provider) NULL -#else /* TRACEPOINT_PROBE_DYNAMIC_LINKAGE */ -#define _TRACEPOINT_UNDEFINED_REF(provider) &__tracepoint_provider_##provider -#endif /* TRACEPOINT_PROBE_DYNAMIC_LINKAGE */ + +#if LTTNG_UST_COMPAT_API(0) +# if defined(TRACEPOINT_PROBE_DYNAMIC_LINKAGE) && !defined(LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE) +# define LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE +# endif +#endif /* #if LTTNG_UST_COMPAT_API(0) */ + +#ifdef LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE +#define LTTNG_UST__TRACEPOINT_UNDEFINED_REF(provider) NULL +#else /* LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE */ +#define LTTNG_UST__TRACEPOINT_UNDEFINED_REF(provider) <tng_ust_tracepoint_provider_##provider +#endif /* LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE */ /* * Note: to allow PIC code, we need to allow the linker to update the pointers - * in the __tracepoints_ptrs section. + * in the lttng_ust_tracepoints_ptrs section. * Therefore, this section is _not_ const (read-only). */ -#define _TP_EXTRACT_STRING(...) #__VA_ARGS__ - -#define _DEFINE_TRACEPOINT(_provider, _name, _args) \ - extern int __tracepoint_provider_##_provider; \ - static const char __tp_strtab_##_provider##___##_name[] \ - __attribute__((section("__tracepoints_strings"))) = \ - #_provider ":" #_name; \ - struct lttng_ust_tracepoint __tracepoint_##_provider##___##_name \ - __attribute__((section("__tracepoints"))) = \ - { \ - __tp_strtab_##_provider##___##_name, \ +#define LTTNG_UST__TP_EXTRACT_STRING(...) #__VA_ARGS__ + +#undef LTTNG_UST__DEFINE_TRACEPOINT +#define LTTNG_UST__DEFINE_TRACEPOINT(_provider, _name, _args) \ + lttng_ust_tracepoint_validate_name_len(_provider, _name); \ + extern int lttng_ust_tracepoint_provider_##_provider \ + LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY; \ + static const char lttng_ust_tp_provider_strtab_##_provider##___##_name[] \ + __attribute__((section("lttng_ust_tracepoints_strings"))) = \ + #_provider; \ + static const char lttng_ust_tp_name_strtab_##_provider##___##_name[] \ + __attribute__((section("lttng_ust_tracepoints_strings"))) = \ + #_name; \ + struct lttng_ust_tracepoint lttng_ust_tracepoint_##_provider##___##_name \ + __attribute__((section("lttng_ust_tracepoints"))) \ + LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY = { \ + sizeof(struct lttng_ust_tracepoint), \ + lttng_ust_tp_provider_strtab_##_provider##___##_name, \ + lttng_ust_tp_name_strtab_##_provider##___##_name, \ 0, \ NULL, \ - _TRACEPOINT_UNDEFINED_REF(_provider), \ - _TP_EXTRACT_STRING(_args), \ - { }, \ + LTTNG_UST__TRACEPOINT_UNDEFINED_REF(_provider), \ + LTTNG_UST__TP_EXTRACT_STRING(_args), \ }; \ static struct lttng_ust_tracepoint * \ - __tracepoint_ptr_##_provider##___##_name \ - __attribute__((used, section("__tracepoints_ptrs"))) = \ - &__tracepoint_##_provider##___##_name; + lttng_ust_tracepoint_ptr_##_provider##___##_name \ + __attribute__((section("lttng_ust_tracepoints_ptrs"), used)) \ + __lttng_ust_variable_attribute_no_sanitize_address = \ + <tng_ust_tracepoint_##_provider##___##_name; -static void lttng_ust_notrace __attribute__((constructor)) -__tracepoints__ptrs_init(void); static void -__tracepoints__ptrs_init(void) +lttng_ust__tracepoints__ptrs_init(void) + lttng_ust_notrace __attribute__((constructor(LTTNG_UST_CONSTRUCTOR_PRIO))); +static void +lttng_ust__tracepoints__ptrs_init(void) { - if (__tracepoint_ptrs_registered++) + if (lttng_ust_tracepoint_ptrs_registered++) return; - if (!tracepoint_dlopen.liblttngust_handle) - tracepoint_dlopen.liblttngust_handle = - dlopen("liblttng-ust-tracepoint.so.0", RTLD_NOW | RTLD_GLOBAL); - if (!tracepoint_dlopen.liblttngust_handle) + if (!lttng_ust_tracepoint_dlopen_ptr) + lttng_ust_tracepoint_dlopen_ptr = <tng_ust_tracepoint_dlopen; + if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle) + lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle = + dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME, RTLD_NOW | RTLD_GLOBAL); + if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle) { + lttng_ust_tracepoints_print_disabled_message(); return; - tracepoint_dlopen.tracepoint_register_lib = + } + if (!lttng_ust_tracepoint_destructors_syms_ptr) + lttng_ust_tracepoint_destructors_syms_ptr = <tng_ust_tracepoint_destructors_syms; + lttng_ust_tracepoint_dlopen_ptr->lttng_ust_tracepoint_module_register = URCU_FORCE_CAST(int (*)(struct lttng_ust_tracepoint * const *, int), - dlsym(tracepoint_dlopen.liblttngust_handle, - "tracepoint_register_lib")); - tracepoint_dlopen.tracepoint_unregister_lib = + dlsym(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle, + "lttng_ust_tracepoint_module_register")); + lttng_ust_tracepoint_dlopen_ptr->lttng_ust_tracepoint_module_unregister = URCU_FORCE_CAST(int (*)(struct lttng_ust_tracepoint * const *), - dlsym(tracepoint_dlopen.liblttngust_handle, - "tracepoint_unregister_lib")); - __tracepoint__init_urcu_sym(); - if (tracepoint_dlopen.tracepoint_register_lib) { - tracepoint_dlopen.tracepoint_register_lib(__start___tracepoints_ptrs, - __stop___tracepoints_ptrs - - __start___tracepoints_ptrs); + dlsym(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle, + "lttng_ust_tracepoint_module_unregister")); + lttng_ust_tracepoint_destructors_syms_ptr->tracepoint_disable_destructors = + URCU_FORCE_CAST(void (*)(void), + dlsym(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle, + "lttng_ust_tp_disable_destructors")); + lttng_ust_tracepoint_destructors_syms_ptr->tracepoint_get_destructors_state = + URCU_FORCE_CAST(int (*)(void), + dlsym(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle, + "lttng_ust_tp_get_destructors_state")); + lttng_ust_tracepoint__init_urcu_sym(); + if (lttng_ust_tracepoint_dlopen_ptr->lttng_ust_tracepoint_module_register) { + lttng_ust_tracepoint_dlopen_ptr->lttng_ust_tracepoint_module_register(__start_lttng_ust_tracepoints_ptrs, + __stop_lttng_ust_tracepoints_ptrs - + __start_lttng_ust_tracepoints_ptrs); } } -static void lttng_ust_notrace __attribute__((destructor)) -__tracepoints__ptrs_destroy(void); static void -__tracepoints__ptrs_destroy(void) +lttng_ust__tracepoints__ptrs_destroy(void) + lttng_ust_notrace __attribute__((destructor(LTTNG_UST_CONSTRUCTOR_PRIO))); +static void +lttng_ust__tracepoints__ptrs_destroy(void) { int ret; - if (--__tracepoint_ptrs_registered) + if (--lttng_ust_tracepoint_ptrs_registered) return; - if (tracepoint_dlopen.tracepoint_unregister_lib) - tracepoint_dlopen.tracepoint_unregister_lib(__start___tracepoints_ptrs); - if (tracepoint_dlopen.liblttngust_handle && !__tracepoint_registered) { - ret = dlclose(tracepoint_dlopen.liblttngust_handle); + if (!lttng_ust_tracepoint_dlopen_ptr) + lttng_ust_tracepoint_dlopen_ptr = <tng_ust_tracepoint_dlopen; + if (!lttng_ust_tracepoint_destructors_syms_ptr) + lttng_ust_tracepoint_destructors_syms_ptr = <tng_ust_tracepoint_destructors_syms; + if (lttng_ust_tracepoint_dlopen_ptr->lttng_ust_tracepoint_module_unregister) + lttng_ust_tracepoint_dlopen_ptr->lttng_ust_tracepoint_module_unregister(__start_lttng_ust_tracepoints_ptrs); + if (lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle + && lttng_ust_tracepoint_destructors_syms_ptr->tracepoint_get_destructors_state + && lttng_ust_tracepoint_destructors_syms_ptr->tracepoint_get_destructors_state() + && !lttng_ust_tracepoint_ptrs_registered) { + ret = dlclose(lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle); if (ret) { fprintf(stderr, "Error (%d) in dlclose\n", ret); abort(); } - memset(&tracepoint_dlopen, 0, sizeof(tracepoint_dlopen)); + memset(lttng_ust_tracepoint_dlopen_ptr, 0, sizeof(*lttng_ust_tracepoint_dlopen_ptr)); } } -#else /* TRACEPOINT_DEFINE */ +#ifdef __cplusplus +} +#endif + +#endif /* _LTTNG_UST_TRACEPOINT_DEFINE_ONCE */ -#define _DEFINE_TRACEPOINT(_provider, _name, _args) +#else /* LTTNG_UST_TRACEPOINT_DEFINE */ -#endif /* #else TRACEPOINT_DEFINE */ +#undef LTTNG_UST__DEFINE_TRACEPOINT +#define LTTNG_UST__DEFINE_TRACEPOINT(_provider, _name, _args) -#ifdef __cplusplus -} +#endif /* #else LTTNG_UST_TRACEPOINT_DEFINE */ + +/* + * LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION: Define this before including + * a tracepoint instrumentation header to hide symbols associated with + * tracepoint module instrumentation. This is useful if all compile + * units using the lttng_ust_tracepoint(), + * lttng_ust_tracepoint_enabled() and lttng_ust_do_tracepoint() macros + * is within the same module as the compile unit including the + * tracepoint header after defining LTTNG_UST_TRACEPOINT_DEFINE. + */ + +#undef LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY +#ifdef LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION +#define LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY __attribute__((visibility("hidden"))) +#else +#define LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY __attribute__((visibility("default"))) +#endif + +/* + * LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION: Define this before + * including a tracepoint instrumentation header to hide symbols + * associated with the tracepoint provider. This is useful if the + * tracepoint definition (including the header after defining + * LTTNG_UST_TRACEPOINT_DEFINE) is in the same module as the provider + * (including the header after defining + * LTTNG_UST_TRACEPOINT_CREATE_PROBES). + */ +#undef LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY +#ifdef LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION +#define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("hidden"))) +#else +#define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("default"))) #endif -#endif /* _LTTNG_TRACEPOINT_H */ +#ifndef LTTNG_UST_TRACEPOINT_ENUM -/* The following declarations must be outside re-inclusion protection. */ +/* + * Tracepoint Enumerations + * + * The enumeration is a mapping between an integer, or range of integers, and + * a string. It can be used to have a more compact trace in cases where the + * possible values for a field are limited: + * + * An example: + * + * LTTNG_UST_TRACEPOINT_ENUM(someproject_component, enumname, + * LTTNG_UST_TP_ENUM_VALUES( + * lttng_ust_field_enum_value("even", 0) + * lttng_ust_field_enum_value("uneven", 1) + * lttng_ust_field_enum_range("twoto4", 2, 4) + * lttng_ust_field_enum_value("five", 5) + * ) + * ) + * + * Where "someproject_component" is the name of the component this enumeration + * belongs to and "enumname" identifies this enumeration. Inside the + * LTTNG_UST_TP_ENUM_VALUES macro is the actual mapping. Each string value can map + * to either a single value with lttng_ust_field_enum_value or a range of values + * with lttng_ust_field_enum_range. + * + * Enumeration ranges may overlap, but the behavior is implementation-defined, + * each trace reader will handle overlapping as it wishes. + * + * That enumeration can then be used in a field inside the TP_FIELD macro using + * the following line: + * + * lttng_ust_field_enum(someproject_component, enumname, enumtype, enumfield, enumval) + * + * Where "someproject_component" and "enumname" match those in the + * LTTNG_UST_TRACEPOINT_ENUM, "enumtype" is a signed or unsigned integer type + * backing the enumeration, "enumfield" is the name of the field and + * "enumval" is the value. + */ + +#define LTTNG_UST_TRACEPOINT_ENUM(provider, name, values) -#ifndef TRACEPOINT_EVENT +#if LTTNG_UST_COMPAT_API(0) +#define TRACEPOINT_ENUM LTTNG_UST_TRACEPOINT_ENUM +#endif /* #if LTTNG_UST_COMPAT_API(0) */ + +#endif /* #ifndef LTTNG_UST_TRACEPOINT_ENUM */ + +#ifndef LTTNG_UST_TRACEPOINT_EVENT /* - * How to use the TRACEPOINT_EVENT macro: + * How to use the LTTNG_UST_TRACEPOINT_EVENT macro: * * An example: - * - * TRACEPOINT_EVENT(someproject_component, event_name, * - * * TP_ARGS takes from 0 to 10 "type, field_name" pairs * + * LTTNG_UST_TRACEPOINT_EVENT(someproject_component, event_name, + * + * * LTTNG_UST_TP_ARGS takes from 0 to 10 "type, field_name" pairs * * - * TP_ARGS(int, arg0, void *, arg1, char *, string, size_t, strlen, + * LTTNG_UST_TP_ARGS(int, arg0, void *, arg1, char *, string, size_t, strlen, * long *, arg4, size_t, arg4_len), * - * * TP_FIELDS describes the event payload layout in the trace * + * * LTTNG_UST_TP_FIELDS describes the event payload layout in the trace * * - * TP_FIELDS( - * * Integer, printed in base 10 * - * ctf_integer(int, field_a, arg0) + * LTTNG_UST_TP_FIELDS( + * * Integer, printed in base 10 * + * lttng_ust_field_integer(int, field_a, arg0) * - * * Integer, printed with 0x base 16 * - * ctf_integer_hex(unsigned long, field_d, arg1) + * * Integer, printed with 0x base 16 * + * lttng_ust_field_integer_hex(unsigned long, field_d, arg1) * - * * Array Sequence, printed as UTF8-encoded array of bytes * - * ctf_array_text(char, field_b, string, FIXED_LEN) - * ctf_sequence_text(char, field_c, string, size_t, strlen) + * * Enumeration * + * lttng_ust_field_enum(someproject_component, enum_name, int, field_e, arg0) * - * * String, printed as UTF8-encoded string * - * ctf_string(field_e, string) + * * Array Sequence, printed as UTF8-encoded array of bytes * + * lttng_ust_field_array_text(char, field_b, string, FIXED_LEN) + * lttng_ust_field_sequence_text(char, field_c, string, size_t, strlen) * - * * Array sequence of signed integer values * - * ctf_array(long, field_f, arg4, FIXED_LEN4) - * ctf_sequence(long, field_g, arg4, size_t, arg4_len) + * * String, printed as UTF8-encoded string * + * lttng_ust_field_string(field_e, string) + * + * * Array sequence of signed integer values * + * lttng_ust_field_array(long, field_f, arg4, FIXED_LEN4) + * lttng_ust_field_sequence(long, field_g, arg4, size_t, arg4_len) * ) * ) * @@ -503,19 +852,28 @@ __tracepoints__ptrs_destroy(void) * the provider:event identifier is limited to 127 characters. */ -#define TRACEPOINT_EVENT(provider, name, args, fields) \ - _DECLARE_TRACEPOINT(provider, name, _TP_PARAMS(args)) \ - _DEFINE_TRACEPOINT(provider, name, _TP_PARAMS(args)) +#define LTTNG_UST_TRACEPOINT_EVENT(provider, name, args, fields) \ + LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \ + LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) + +#define LTTNG_UST_TRACEPOINT_EVENT_CLASS(provider, name, args, fields) -#define TRACEPOINT_EVENT_CLASS(provider, name, args, fields) +#define LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(template_provider, template_name, provider, name, args) \ + LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \ + LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) -#define TRACEPOINT_EVENT_INSTANCE(provider, _template, name, args) \ - _DECLARE_TRACEPOINT(provider, name, _TP_PARAMS(args)) \ - _DEFINE_TRACEPOINT(provider, name, _TP_PARAMS(args)) +#if LTTNG_UST_COMPAT_API(0) +#define TRACEPOINT_EVENT LTTNG_UST_TRACEPOINT_EVENT +#define TRACEPOINT_EVENT_CLASS LTTNG_UST_TRACEPOINT_EVENT_CLASS +#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, args) \ + LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(_provider, _template, \ + _provider, _name, LTTNG_UST__TP_PARAMS(args)) -#endif /* #ifndef TRACEPOINT_EVENT */ +#endif /* #if LTTNG_UST_COMPAT_API(0) */ -#ifndef TRACEPOINT_LOGLEVEL +#endif /* #ifndef LTTNG_UST_TRACEPOINT_EVENT */ + +#ifndef LTTNG_UST_TRACEPOINT_LOGLEVEL /* * Tracepoint Loglevels @@ -529,88 +887,112 @@ __tracepoints__ptrs_destroy(void) * semantic. Loglevels 7 through 13 offer more fine-grained selection of * debug information. * - * TRACE_EMERG 0 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG 0 * system is unusable * - * TRACE_ALERT 1 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT 1 * action must be taken immediately * - * TRACE_CRIT 2 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT 2 * critical conditions * - * TRACE_ERR 3 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR 3 * error conditions * - * TRACE_WARNING 4 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING 4 * warning conditions * - * TRACE_NOTICE 5 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE 5 * normal, but significant, condition * - * TRACE_INFO 6 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO 6 * informational message * - * TRACE_DEBUG_SYSTEM 7 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM 7 * debug information with system-level scope (set of programs) * - * TRACE_DEBUG_PROGRAM 8 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM 8 * debug information with program-level scope (set of processes) * - * TRACE_DEBUG_PROCESS 9 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS 9 * debug information with process-level scope (set of modules) * - * TRACE_DEBUG_MODULE 10 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE 10 * debug information with module (executable/library) scope (set of units) * - * TRACE_DEBUG_UNIT 11 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT 11 * debug information with compilation unit scope (set of functions) * - * TRACE_DEBUG_FUNCTION 12 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION 12 * debug information with function-level scope * - * TRACE_DEBUG_LINE 13 - * debug information with line-level scope (TRACEPOINT_EVENT default) + * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE 13 + * debug information with line-level scope (LTTNG_UST_TRACEPOINT_EVENT default) * - * TRACE_DEBUG 14 + * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG 14 * debug-level message * - * Declare tracepoint loglevels for tracepoints. A TRACEPOINT_EVENT - * should be declared prior to the the TRACEPOINT_LOGLEVEL for a given + * Declare tracepoint loglevels for tracepoints. A LTTNG_UST_TRACEPOINT_EVENT + * should be declared prior to the the LTTNG_UST_TRACEPOINT_LOGLEVEL for a given * tracepoint name. The first field is the provider name, the second * field is the name of the tracepoint, the third field is the loglevel * name. * - * TRACEPOINT_LOGLEVEL(< [com_company_]project[_component] >, < event >, + * LTTNG_UST_TRACEPOINT_LOGLEVEL(< [com_company_]project[_component] >, < event >, * < loglevel_name >) * - * The TRACEPOINT_PROVIDER must be already declared before declaring a - * TRACEPOINT_LOGLEVEL. + * The LTTNG_UST_TRACEPOINT_PROVIDER must be already declared before declaring a + * LTTNG_UST_TRACEPOINT_LOGLEVEL. */ enum { - TRACE_EMERG = 0, - TRACE_ALERT = 1, - TRACE_CRIT = 2, - TRACE_ERR = 3, - TRACE_WARNING = 4, - TRACE_NOTICE = 5, - TRACE_INFO = 6, - TRACE_DEBUG_SYSTEM = 7, - TRACE_DEBUG_PROGRAM = 8, - TRACE_DEBUG_PROCESS = 9, - TRACE_DEBUG_MODULE = 10, - TRACE_DEBUG_UNIT = 11, - TRACE_DEBUG_FUNCTION = 12, - TRACE_DEBUG_LINE = 13, - TRACE_DEBUG = 14, + LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG = 0, + LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT = 1, + LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT = 2, + LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR = 3, + LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING = 4, + LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE = 5, + LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO = 6, + LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM = 7, + LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM = 8, + LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS = 9, + LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE = 10, + LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT = 11, + LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION = 12, + LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE = 13, + LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG = 14, }; -#define TRACEPOINT_LOGLEVEL(provider, name, loglevel) +#define LTTNG_UST_TRACEPOINT_LOGLEVEL(provider, name, loglevel) + +#if LTTNG_UST_COMPAT_API(0) +#define TRACEPOINT_LOGLEVEL LTTNG_UST_TRACEPOINT_LOGLEVEL + +#define TRACE_EMERG LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG +#define TRACE_ALERT LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT +#define TRACE_CRIT LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT +#define TRACE_ERR LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR +#define TRACE_WARNING LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING +#define TRACE_NOTICE LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE +#define TRACE_INFO LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO +#define TRACE_DEBUG_SYSTEM LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM +#define TRACE_DEBUG_PROGRAM LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM +#define TRACE_DEBUG_PROCESS LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS +#define TRACE_DEBUG_MODULE LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE +#define TRACE_DEBUG_UNIT LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT +#define TRACE_DEBUG_FUNCTION LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION +#define TRACE_DEBUG_LINE LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE +#define TRACE_DEBUG LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG +#endif + +#endif /* #ifndef LTTNG_UST_TRACEPOINT_LOGLEVEL */ -#endif /* #ifndef TRACEPOINT_LOGLEVEL */ +#ifndef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI -#ifndef TRACEPOINT_MODEL_EMF_URI +#define LTTNG_UST_TRACEPOINT_MODEL_EMF_URI(provider, name, uri) -#define TRACEPOINT_MODEL_EMF_URI(provider, name, uri) +#if LTTNG_UST_COMPAT_API(0) +#define TRACEPOINT_MODEL_EMF_URI LTTNG_UST_TRACEPOINT_MODEL_EMF_URI +#endif -#endif /* #ifndef TRACEPOINT_MODEL_EMF_URI */ +#endif /* #ifndef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI */