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      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
     76