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 VTableProfData
  40     VTableProfStart __asm("section$start$__DATA$" INSTR_PROF_VTAB_SECT_NAME);
  41 COMPILER_RT_VISIBILITY
  42 extern VTableProfData
  43     VTableProfEnd __asm("section$end$__DATA$" INSTR_PROF_VTAB_SECT_NAME);
  44 COMPILER_RT_VISIBILITY
  45 extern char
  46     VNameStart __asm("section$start$__DATA$" INSTR_PROF_VNAME_SECT_NAME);
  47 COMPILER_RT_VISIBILITY
  48 extern char VNameEnd __asm("section$end$__DATA$" INSTR_PROF_VNAME_SECT_NAME);
  49 COMPILER_RT_VISIBILITY
  50 extern uint32_t
  51     OrderFileStart __asm("section$start$__DATA$" INSTR_PROF_ORDERFILE_SECT_NAME);
  52
  53 COMPILER_RT_VISIBILITY
  54 extern ValueProfNode
  55     VNodesStart __asm("section$start$__DATA$" INSTR_PROF_VNODES_SECT_NAME);
  56 COMPILER_RT_VISIBILITY
  57 extern ValueProfNode
  58     VNodesEnd __asm("section$end$__DATA$" INSTR_PROF_VNODES_SECT_NAME);
  59
  60 COMPILER_RT_VISIBILITY
  61 const __llvm_profile_data *__llvm_profile_begin_data(void) {
  62   return &DataStart;
  63 }
  64 COMPILER_RT_VISIBILITY
  65 const __llvm_profile_data *__llvm_profile_end_data(void) { return &DataEnd; }
  66 COMPILER_RT_VISIBILITY
  67 const char *__llvm_profile_begin_names(void) { return &NamesStart; }
  68 COMPILER_RT_VISIBILITY
  69 const char *__llvm_profile_end_names(void) { return &NamesEnd; }
  70 COMPILER_RT_VISIBILITY
  71 char *__llvm_profile_begin_counters(void) { return &CountersStart; }
  72 COMPILER_RT_VISIBILITY
  73 char *__llvm_profile_end_counters(void) { return &CountersEnd; }
  74 COMPILER_RT_VISIBILITY
  75 char *__llvm_profile_begin_bitmap(void) { return &BitmapStart; }
  76 COMPILER_RT_VISIBILITY
  77 char *__llvm_profile_end_bitmap(void) { return &BitmapEnd; }
  78 COMPILER_RT_VISIBILITY
  79 const VTableProfData *__llvm_profile_begin_vtables(void) {
  80   return &VTableProfStart;
  81 }
  82 COMPILER_RT_VISIBILITY
  83 const VTableProfData *__llvm_profile_end_vtables(void) {
  84   return &VTableProfEnd;
  85 }
  86 COMPILER_RT_VISIBILITY
  87 const char *__llvm_profile_begin_vtabnames(void) { return &VNameStart; }
  88 COMPILER_RT_VISIBILITY
  89 const char *__llvm_profile_end_vtabnames(void) { return &VNameEnd; }
  90 COMPILER_RT_VISIBILITY
  91 uint32_t *__llvm_profile_begin_orderfile(void) { return &OrderFileStart; }
  92
  93 COMPILER_RT_VISIBILITY
  94 ValueProfNode *__llvm_profile_begin_vnodes(void) {
  95   return &VNodesStart;
  96 }
  97 COMPILER_RT_VISIBILITY
  98 ValueProfNode *__llvm_profile_end_vnodes(void) { return &VNodesEnd; }
  99
 100 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &VNodesStart;
 101 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &VNodesEnd;
 102
 103 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
 104   return 0;
 105 }
 106
 107 #endif