compiler-rt/lib/profile/InstrProfilingPlatformDarwin.c

   1 /*===- InstrProfilingPlatformDarwin.c - Profile data on Darwin ------------===*\
   2 |*
   3 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 |* See https://llvm.org/LICENSE.txt for license information.
   5 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 |*
   7 \*===----------------------------------------------------------------------===*/
   8
   9 // Note: This is linked into the Darwin kernel, and must remain compatible
  10 // with freestanding compilation. See `darwin_add_builtin_libraries`.
  11
  12 #include "InstrProfiling.h"
  13 #include "InstrProfilingInternal.h"
  14
  15 #if defined(__APPLE__)
  16 /* Use linker magic to find the bounds of the Data section. */
  17 COMPILER_RT_VISIBILITY
  18 extern __llvm_profile_data
  19     DataStart __asm("section$start$__DATA$" INSTR_PROF_DATA_SECT_NAME);
  20 COMPILER_RT_VISIBILITY
  21 extern __llvm_profile_data
  22     DataEnd __asm("section$end$__DATA$" INSTR_PROF_DATA_SECT_NAME);
  23 COMPILER_RT_VISIBILITY
  24 extern char
  25     NamesStart __asm("section$start$__DATA$" INSTR_PROF_NAME_SECT_NAME);
  26 COMPILER_RT_VISIBILITY
  27 extern char NamesEnd __asm("section$end$__DATA$" INSTR_PROF_NAME_SECT_NAME);
  28 COMPILER_RT_VISIBILITY
  29 extern char
  30     CountersStart __asm("section$start$__DATA$" INSTR_PROF_CNTS_SECT_NAME);
  31 COMPILER_RT_VISIBILITY
  32 extern char CountersEnd __asm("section$end$__DATA$" INSTR_PROF_CNTS_SECT_NAME);
  33 COMPILER_RT_VISIBILITY
  34 extern char
  35     BitmapStart __asm("section$start$__DATA$" INSTR_PROF_BITS_SECT_NAME);
  36 COMPILER_RT_VISIBILITY
  37 extern char BitmapEnd __asm("section$end$__DATA$" INSTR_PROF_BITS_SECT_NAME);
  38 COMPILER_RT_VISIBILITY
  39 extern uint32_t
  40     OrderFileStart __asm("section$start$__DATA$" INSTR_PROF_ORDERFILE_SECT_NAME);
  41
  42 COMPILER_RT_VISIBILITY
  43 extern ValueProfNode
  44     VNodesStart __asm("section$start$__DATA$" INSTR_PROF_VNODES_SECT_NAME);
  45 COMPILER_RT_VISIBILITY
  46 extern ValueProfNode
  47     VNodesEnd __asm("section$end$__DATA$" INSTR_PROF_VNODES_SECT_NAME);
  48
  49 COMPILER_RT_VISIBILITY
  50 const __llvm_profile_data *__llvm_profile_begin_data(void) {
  51   return &DataStart;
  52 }
  53 COMPILER_RT_VISIBILITY
  54 const __llvm_profile_data *__llvm_profile_end_data(void) { return &DataEnd; }
  55 COMPILER_RT_VISIBILITY
  56 const char *__llvm_profile_begin_names(void) { return &NamesStart; }
  57 COMPILER_RT_VISIBILITY
  58 const char *__llvm_profile_end_names(void) { return &NamesEnd; }
  59 COMPILER_RT_VISIBILITY
  60 char *__llvm_profile_begin_counters(void) { return &CountersStart; }
  61 COMPILER_RT_VISIBILITY
  62 char *__llvm_profile_end_counters(void) { return &CountersEnd; }
  63 COMPILER_RT_VISIBILITY
  64 char *__llvm_profile_begin_bitmap(void) { return &BitmapStart; }
  65 COMPILER_RT_VISIBILITY
  66 char *__llvm_profile_end_bitmap(void) { return &BitmapEnd; }
  67 COMPILER_RT_VISIBILITY
  68 uint32_t *__llvm_profile_begin_orderfile(void) { return &OrderFileStart; }
  69
  70 COMPILER_RT_VISIBILITY
  71 ValueProfNode *__llvm_profile_begin_vnodes(void) {
  72   return &VNodesStart;
  73 }
  74 COMPILER_RT_VISIBILITY
  75 ValueProfNode *__llvm_profile_end_vnodes(void) { return &VNodesEnd; }
  76
  77 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &VNodesStart;
  78 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &VNodesEnd;
  79
  80 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
  81   return 0;
  82 }
  83
  84 #endif