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. */
17COMPILER_RT_VISIBILITY
18extern __llvm_profile_data
19    DataStart __asm("section$start$__DATA$" INSTR_PROF_DATA_SECT_NAME);
20COMPILER_RT_VISIBILITY
21extern __llvm_profile_data
22    DataEnd __asm("section$end$__DATA$" INSTR_PROF_DATA_SECT_NAME);
23COMPILER_RT_VISIBILITY
24extern char
25    NamesStart __asm("section$start$__DATA$" INSTR_PROF_NAME_SECT_NAME);
26COMPILER_RT_VISIBILITY
27extern char NamesEnd __asm("section$end$__DATA$" INSTR_PROF_NAME_SECT_NAME);
28COMPILER_RT_VISIBILITY
29extern char
30    CountersStart __asm("section$start$__DATA$" INSTR_PROF_CNTS_SECT_NAME);
31COMPILER_RT_VISIBILITY
32extern char CountersEnd __asm("section$end$__DATA$" INSTR_PROF_CNTS_SECT_NAME);
33COMPILER_RT_VISIBILITY
34extern uint32_t
35    OrderFileStart __asm("section$start$__DATA$" INSTR_PROF_ORDERFILE_SECT_NAME);
36
37COMPILER_RT_VISIBILITY
38extern ValueProfNode
39    VNodesStart __asm("section$start$__DATA$" INSTR_PROF_VNODES_SECT_NAME);
40COMPILER_RT_VISIBILITY
41extern ValueProfNode
42    VNodesEnd __asm("section$end$__DATA$" INSTR_PROF_VNODES_SECT_NAME);
43
44COMPILER_RT_VISIBILITY
45const __llvm_profile_data *__llvm_profile_begin_data(void) {
46  return &DataStart;
47}
48COMPILER_RT_VISIBILITY
49const __llvm_profile_data *__llvm_profile_end_data(void) { return &DataEnd; }
50COMPILER_RT_VISIBILITY
51const char *__llvm_profile_begin_names(void) { return &NamesStart; }
52COMPILER_RT_VISIBILITY
53const char *__llvm_profile_end_names(void) { return &NamesEnd; }
54COMPILER_RT_VISIBILITY
55char *__llvm_profile_begin_counters(void) { return &CountersStart; }
56COMPILER_RT_VISIBILITY
57char *__llvm_profile_end_counters(void) { return &CountersEnd; }
58COMPILER_RT_VISIBILITY
59uint32_t *__llvm_profile_begin_orderfile(void) { return &OrderFileStart; }
60
61COMPILER_RT_VISIBILITY
62ValueProfNode *__llvm_profile_begin_vnodes(void) {
63  return &VNodesStart;
64}
65COMPILER_RT_VISIBILITY
66ValueProfNode *__llvm_profile_end_vnodes(void) { return &VNodesEnd; }
67
68COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &VNodesStart;
69COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &VNodesEnd;
70
71COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
72  return 0;
73}
74
75#endif
76