contrib/llvm-project/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c

   1 /*===- InstrProfilingPlatformLinux.c - Profile data Linux platform ------===*\
   2 |*
   3 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 |* See https://llvm.org/LICENSE.txt for license information.
   5 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 |*
   7 \*===----------------------------------------------------------------------===*/
   8
   9 #if defined(__linux__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
  10     (defined(__sun__) && defined(__svr4__)) || defined(__NetBSD__)
  11
  12 #include <stdlib.h>
  13
  14 #include "InstrProfiling.h"
  15
  16 #define PROF_DATA_START INSTR_PROF_SECT_START(INSTR_PROF_DATA_COMMON)
  17 #define PROF_DATA_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_DATA_COMMON)
  18 #define PROF_NAME_START INSTR_PROF_SECT_START(INSTR_PROF_NAME_COMMON)
  19 #define PROF_NAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_NAME_COMMON)
  20 #define PROF_CNTS_START INSTR_PROF_SECT_START(INSTR_PROF_CNTS_COMMON)
  21 #define PROF_CNTS_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_CNTS_COMMON)
  22 #define PROF_ORDERFILE_START INSTR_PROF_SECT_START(INSTR_PROF_ORDERFILE_COMMON)
  23 #define PROF_VNODES_START INSTR_PROF_SECT_START(INSTR_PROF_VNODES_COMMON)
  24 #define PROF_VNODES_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_VNODES_COMMON)
  25
  26 /* Declare section start and stop symbols for various sections
  27  * generated by compiler instrumentation.
  28  */
  29 extern __llvm_profile_data PROF_DATA_START COMPILER_RT_VISIBILITY;
  30 extern __llvm_profile_data PROF_DATA_STOP COMPILER_RT_VISIBILITY;
  31 extern uint64_t PROF_CNTS_START COMPILER_RT_VISIBILITY;
  32 extern uint64_t PROF_CNTS_STOP COMPILER_RT_VISIBILITY;
  33 extern uint32_t PROF_ORDERFILE_START COMPILER_RT_VISIBILITY;
  34 extern char PROF_NAME_START COMPILER_RT_VISIBILITY;
  35 extern char PROF_NAME_STOP COMPILER_RT_VISIBILITY;
  36 extern ValueProfNode PROF_VNODES_START COMPILER_RT_VISIBILITY;
  37 extern ValueProfNode PROF_VNODES_STOP COMPILER_RT_VISIBILITY;
  38
  39 /* Add dummy data to ensure the section is always created. */
  40 __llvm_profile_data
  41     __prof_data_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_DATA_SECT_NAME);
  42 uint64_t
  43     __prof_cnts_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_CNTS_SECT_NAME);
  44 uint32_t
  45     __prof_orderfile_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_ORDERFILE_SECT_NAME);
  46 char __prof_nms_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_NAME_SECT_NAME);
  47 ValueProfNode __prof_vnodes_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_VNODES_SECT_NAME);
  48
  49 COMPILER_RT_VISIBILITY const __llvm_profile_data *
  50 __llvm_profile_begin_data(void) {
  51   return &PROF_DATA_START;
  52 }
  53 COMPILER_RT_VISIBILITY const __llvm_profile_data *
  54 __llvm_profile_end_data(void) {
  55   return &PROF_DATA_STOP;
  56 }
  57 COMPILER_RT_VISIBILITY const char *__llvm_profile_begin_names(void) {
  58   return &PROF_NAME_START;
  59 }
  60 COMPILER_RT_VISIBILITY const char *__llvm_profile_end_names(void) {
  61   return &PROF_NAME_STOP;
  62 }
  63 COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_begin_counters(void) {
  64   return &PROF_CNTS_START;
  65 }
  66 COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_end_counters(void) {
  67   return &PROF_CNTS_STOP;
  68 }
  69 COMPILER_RT_VISIBILITY uint32_t *__llvm_profile_begin_orderfile(void) {
  70   return &PROF_ORDERFILE_START;
  71 }
  72
  73 COMPILER_RT_VISIBILITY ValueProfNode *
  74 __llvm_profile_begin_vnodes(void) {
  75   return &PROF_VNODES_START;
  76 }
  77 COMPILER_RT_VISIBILITY ValueProfNode *__llvm_profile_end_vnodes(void) {
  78   return &PROF_VNODES_STOP;
  79 }
  80 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &PROF_VNODES_START;
  81 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &PROF_VNODES_STOP;
  82
  83 #endif