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

   1 /*===- InstrProfilingPlatformLinux.c - Profile data Linux platform ------===*\
   2 |*
   3 |*                     The LLVM Compiler Infrastructure
   4 |*
   5 |* This file is distributed under the University of Illinois Open Source
   6 |* License. See LICENSE.TXT for details.
   7 |*
   8 \*===----------------------------------------------------------------------===*/
   9
  10 #include "InstrProfiling.h"
  11
  12 #if defined(__linux__) || defined(__FreeBSD__)
  13 #include <stdlib.h>
  14
  15 #define PROF_DATA_START INSTR_PROF_SECT_START(INSTR_PROF_DATA_SECT_NAME)
  16 #define PROF_DATA_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_DATA_SECT_NAME)
  17 #define PROF_NAME_START INSTR_PROF_SECT_START(INSTR_PROF_NAME_SECT_NAME)
  18 #define PROF_NAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_NAME_SECT_NAME)
  19 #define PROF_CNTS_START INSTR_PROF_SECT_START(INSTR_PROF_CNTS_SECT_NAME)
  20 #define PROF_CNTS_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_CNTS_SECT_NAME)
  21 #define PROF_VNODES_START INSTR_PROF_SECT_START(INSTR_PROF_VNODES_SECT_NAME)
  22 #define PROF_VNODES_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_VNODES_SECT_NAME)
  23
  24 /* Declare section start and stop symbols for various sections
  25  * generated by compiler instrumentation.
  26  */
  27 extern __llvm_profile_data PROF_DATA_START COMPILER_RT_VISIBILITY;
  28 extern __llvm_profile_data PROF_DATA_STOP COMPILER_RT_VISIBILITY;
  29 extern uint64_t PROF_CNTS_START COMPILER_RT_VISIBILITY;
  30 extern uint64_t PROF_CNTS_STOP COMPILER_RT_VISIBILITY;
  31 extern char PROF_NAME_START COMPILER_RT_VISIBILITY;
  32 extern char PROF_NAME_STOP COMPILER_RT_VISIBILITY;
  33 extern ValueProfNode PROF_VNODES_START COMPILER_RT_VISIBILITY;
  34 extern ValueProfNode PROF_VNODES_STOP COMPILER_RT_VISIBILITY;
  35
  36 /* Add dummy data to ensure the section is always created. */
  37 __llvm_profile_data
  38     __prof_data_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_DATA_SECT_NAME_STR);
  39 uint64_t
  40     __prof_cnts_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_CNTS_SECT_NAME_STR);
  41 char __prof_nms_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_NAME_SECT_NAME_STR);
  42 ValueProfNode __prof_vnodes_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_VNODES_SECT_NAME_STR);
  43
  44 COMPILER_RT_VISIBILITY const __llvm_profile_data *
  45 __llvm_profile_begin_data(void) {
  46   return &PROF_DATA_START;
  47 }
  48 COMPILER_RT_VISIBILITY const __llvm_profile_data *
  49 __llvm_profile_end_data(void) {
  50   return &PROF_DATA_STOP;
  51 }
  52 COMPILER_RT_VISIBILITY const char *__llvm_profile_begin_names(void) {
  53   return &PROF_NAME_START;
  54 }
  55 COMPILER_RT_VISIBILITY const char *__llvm_profile_end_names(void) {
  56   return &PROF_NAME_STOP;
  57 }
  58 COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_begin_counters(void) {
  59   return &PROF_CNTS_START;
  60 }
  61 COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_end_counters(void) {
  62   return &PROF_CNTS_STOP;
  63 }
  64
  65 COMPILER_RT_VISIBILITY ValueProfNode *
  66 __llvm_profile_begin_vnodes(void) {
  67   return &PROF_VNODES_START;
  68 }
  69 COMPILER_RT_VISIBILITY ValueProfNode *__llvm_profile_end_vnodes(void) {
  70   return &PROF_VNODES_STOP;
  71 }
  72 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &PROF_VNODES_START;
  73 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &PROF_VNODES_STOP;
  74
  75 #endif