src/compiler-rt/lib/profile/InstrProfilingPlatformDarwin.c

   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