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      1 /*===- InstrProfilingPlatformDarwin.c - Profile data on Darwin ------------===*\
      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(__APPLE__)
     13 /* Use linker magic to find the bounds of the Data section. */
     14 COMPILER_RT_VISIBILITY
     15 extern __llvm_profile_data
     16     DataStart __asm("section$start$__DATA$" INSTR_PROF_DATA_SECT_NAME_STR);
     17 COMPILER_RT_VISIBILITY
     18 extern __llvm_profile_data
     19     DataEnd __asm("section$end$__DATA$" INSTR_PROF_DATA_SECT_NAME_STR);
     20 COMPILER_RT_VISIBILITY
     21 extern char
     22     NamesStart __asm("section$start$__DATA$" INSTR_PROF_NAME_SECT_NAME_STR);
     23 COMPILER_RT_VISIBILITY
     24 extern char NamesEnd __asm("section$end$__DATA$" INSTR_PROF_NAME_SECT_NAME_STR);
     25 COMPILER_RT_VISIBILITY
     26 extern uint64_t
     27     CountersStart __asm("section$start$__DATA$" INSTR_PROF_CNTS_SECT_NAME_STR);
     28 COMPILER_RT_VISIBILITY
     29 extern uint64_t
     30     CountersEnd __asm("section$end$__DATA$" INSTR_PROF_CNTS_SECT_NAME_STR);
     31 
     32 COMPILER_RT_VISIBILITY
     33 const __llvm_profile_data *__llvm_profile_begin_data(void) {
     34   return &DataStart;
     35 }
     36 COMPILER_RT_VISIBILITY
     37 const __llvm_profile_data *__llvm_profile_end_data(void) { return &DataEnd; }
     38 COMPILER_RT_VISIBILITY
     39 const char *__llvm_profile_begin_names(void) { return &NamesStart; }
     40 COMPILER_RT_VISIBILITY
     41 const char *__llvm_profile_end_names(void) { return &NamesEnd; }
     42 COMPILER_RT_VISIBILITY
     43 uint64_t *__llvm_profile_begin_counters(void) { return &CountersStart; }
     44 COMPILER_RT_VISIBILITY
     45 uint64_t *__llvm_profile_end_counters(void) { return &CountersEnd; }
     46 #endif
     47