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 #if defined(__linux__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
  11     (defined(__sun__) && defined(__svr4__))
  12
  13 #include <stdlib.h>
  14
  15 #include "InstrProfiling.h"
  16
  17 #define PROF_DATA_START INSTR_PROF_SECT_START(INSTR_PROF_DATA_SECT_NAME)
  18 #define PROF_DATA_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_DATA_SECT_NAME)
  19 #define PROF_NAME_START INSTR_PROF_SECT_START(INSTR_PROF_NAME_SECT_NAME)
  20 #define PROF_NAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_NAME_SECT_NAME)
  21 #define PROF_CNTS_START INSTR_PROF_SECT_START(INSTR_PROF_CNTS_SECT_NAME)
  22 #define PROF_CNTS_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_CNTS_SECT_NAME)
  23 #define PROF_VNODES_START INSTR_PROF_SECT_START(INSTR_PROF_VNODES_SECT_NAME)
  24 #define PROF_VNODES_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_VNODES_SECT_NAME)
  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 char PROF_NAME_START COMPILER_RT_VISIBILITY;
  34 extern char PROF_NAME_STOP COMPILER_RT_VISIBILITY;
  35 extern ValueProfNode PROF_VNODES_START COMPILER_RT_VISIBILITY;
  36 extern ValueProfNode PROF_VNODES_STOP COMPILER_RT_VISIBILITY;
  37
  38 /* Add dummy data to ensure the section is always created. */
  39 __llvm_profile_data
  40     __prof_data_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_DATA_SECT_NAME_STR);
  41 uint64_t
  42     __prof_cnts_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_CNTS_SECT_NAME_STR);
  43 char __prof_nms_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_NAME_SECT_NAME_STR);
  44 ValueProfNode __prof_vnodes_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_VNODES_SECT_NAME_STR);
  45
  46 COMPILER_RT_VISIBILITY const __llvm_profile_data *
  47 __llvm_profile_begin_data(void) {
  48   return &PROF_DATA_START;
  49 }
  50 COMPILER_RT_VISIBILITY const __llvm_profile_data *
  51 __llvm_profile_end_data(void) {
  52   return &PROF_DATA_STOP;
  53 }
  54 COMPILER_RT_VISIBILITY const char *__llvm_profile_begin_names(void) {
  55   return &PROF_NAME_START;
  56 }
  57 COMPILER_RT_VISIBILITY const char *__llvm_profile_end_names(void) {
  58   return &PROF_NAME_STOP;
  59 }
  60 COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_begin_counters(void) {
  61   return &PROF_CNTS_START;
  62 }
  63 COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_end_counters(void) {
  64   return &PROF_CNTS_STOP;
  65 }
  66
  67 COMPILER_RT_VISIBILITY ValueProfNode *
  68 __llvm_profile_begin_vnodes(void) {
  69   return &PROF_VNODES_START;
  70 }
  71 COMPILER_RT_VISIBILITY ValueProfNode *__llvm_profile_end_vnodes(void) {
  72   return &PROF_VNODES_STOP;
  73 }
  74 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &PROF_VNODES_START;
  75 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &PROF_VNODES_STOP;
  76
  77 #endif