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 #if defined(__linux__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
11     (defined(__sun__) && defined(__svr4__)) || defined(__NetBSD__)
12 
13 #include <stdlib.h>
14 
15 #include "InstrProfiling.h"
16 
17 #define PROF_DATA_START INSTR_PROF_SECT_START(INSTR_PROF_DATA_SECT_NAME)
18 #define PROF_DATA_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_DATA_SECT_NAME)
19 #define PROF_NAME_START INSTR_PROF_SECT_START(INSTR_PROF_NAME_SECT_NAME)
20 #define PROF_NAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_NAME_SECT_NAME)
21 #define PROF_CNTS_START INSTR_PROF_SECT_START(INSTR_PROF_CNTS_SECT_NAME)
22 #define PROF_CNTS_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_CNTS_SECT_NAME)
23 #define PROF_VNODES_START INSTR_PROF_SECT_START(INSTR_PROF_VNODES_SECT_NAME)
24 #define PROF_VNODES_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_VNODES_SECT_NAME)
25 
26 /* Declare section start and stop symbols for various sections
27  * generated by compiler instrumentation.
28  */
29 extern __llvm_profile_data PROF_DATA_START COMPILER_RT_VISIBILITY;
30 extern __llvm_profile_data PROF_DATA_STOP COMPILER_RT_VISIBILITY;
31 extern uint64_t PROF_CNTS_START COMPILER_RT_VISIBILITY;
32 extern uint64_t PROF_CNTS_STOP COMPILER_RT_VISIBILITY;
33 extern char PROF_NAME_START COMPILER_RT_VISIBILITY;
34 extern char PROF_NAME_STOP COMPILER_RT_VISIBILITY;
35 extern ValueProfNode PROF_VNODES_START COMPILER_RT_VISIBILITY;
36 extern ValueProfNode PROF_VNODES_STOP COMPILER_RT_VISIBILITY;
37 
38 /* Add dummy data to ensure the section is always created. */
39 __llvm_profile_data
40     __prof_data_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_DATA_SECT_NAME_STR);
41 uint64_t
42     __prof_cnts_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_CNTS_SECT_NAME_STR);
43 char __prof_nms_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_NAME_SECT_NAME_STR);
44 ValueProfNode __prof_vnodes_sect_data[0] COMPILER_RT_SECTION(INSTR_PROF_VNODES_SECT_NAME_STR);
45 
46 COMPILER_RT_VISIBILITY const __llvm_profile_data *
__llvm_profile_begin_data(void)47 __llvm_profile_begin_data(void) {
48   return &PROF_DATA_START;
49 }
50 COMPILER_RT_VISIBILITY const __llvm_profile_data *
__llvm_profile_end_data(void)51 __llvm_profile_end_data(void) {
52   return &PROF_DATA_STOP;
53 }
__llvm_profile_begin_names(void)54 COMPILER_RT_VISIBILITY const char *__llvm_profile_begin_names(void) {
55   return &PROF_NAME_START;
56 }
__llvm_profile_end_names(void)57 COMPILER_RT_VISIBILITY const char *__llvm_profile_end_names(void) {
58   return &PROF_NAME_STOP;
59 }
__llvm_profile_begin_counters(void)60 COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_begin_counters(void) {
61   return &PROF_CNTS_START;
62 }
__llvm_profile_end_counters(void)63 COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_end_counters(void) {
64   return &PROF_CNTS_STOP;
65 }
66 
67 COMPILER_RT_VISIBILITY ValueProfNode *
__llvm_profile_begin_vnodes(void)68 __llvm_profile_begin_vnodes(void) {
69   return &PROF_VNODES_START;
70 }
__llvm_profile_end_vnodes(void)71 COMPILER_RT_VISIBILITY ValueProfNode *__llvm_profile_end_vnodes(void) {
72   return &PROF_VNODES_STOP;
73 }
74 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &PROF_VNODES_START;
75 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &PROF_VNODES_STOP;
76 
77 #endif
78