InstrProfilingPlatformLinux.c revision 292925 
1/*===- InstrProfilingPlatformLinux.c - Profile data Linux platform ------===*\
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(__linux__) || defined(__FreeBSD__)
13#include <stdlib.h>
14
15#define PROF_DATA_START INSTR_PROF_SECT_START(INSTR_PROF_DATA_SECT_NAME)
16#define PROF_DATA_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_DATA_SECT_NAME)
17#define PROF_NAME_START INSTR_PROF_SECT_START(INSTR_PROF_NAME_SECT_NAME)
18#define PROF_NAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_NAME_SECT_NAME)
19#define PROF_CNTS_START INSTR_PROF_SECT_START(INSTR_PROF_CNTS_SECT_NAME)
20#define PROF_CNTS_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_CNTS_SECT_NAME)
21
22/* Declare section start and stop symbols for various sections
23 * generated by compiler instrumentation.
24 */
25extern __llvm_profile_data PROF_DATA_START COMPILER_RT_VISIBILITY;
26extern __llvm_profile_data PROF_DATA_STOP COMPILER_RT_VISIBILITY;
27extern uint64_t PROF_CNTS_START COMPILER_RT_VISIBILITY;
28extern uint64_t PROF_CNTS_STOP COMPILER_RT_VISIBILITY;
29extern char PROF_NAME_START COMPILER_RT_VISIBILITY;
30extern char PROF_NAME_STOP COMPILER_RT_VISIBILITY;
31
32/* Add dummy data to ensure the section is always created. */
33__llvm_profile_data
34    __prof_data_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_DATA_SECT_NAME_STR);
35uint64_t
36    __prof_cnts_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_CNTS_SECT_NAME_STR);
37char __prof_nms_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_NAME_SECT_NAME_STR);
38
39COMPILER_RT_VISIBILITY const __llvm_profile_data *
40__llvm_profile_begin_data(void) {
41  return &PROF_DATA_START;
42}
43COMPILER_RT_VISIBILITY const __llvm_profile_data *
44__llvm_profile_end_data(void) {
45  return &PROF_DATA_STOP;
46}
47COMPILER_RT_VISIBILITY const char *__llvm_profile_begin_names(void) {
48  return &PROF_NAME_START;
49}
50COMPILER_RT_VISIBILITY const char *__llvm_profile_end_names(void) {
51  return &PROF_NAME_STOP;
52}
53COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_begin_counters(void) {
54  return &PROF_CNTS_START;
55}
56COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_end_counters(void) {
57  return &PROF_CNTS_STOP;
58}
59#endif
60