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[PGO] Unify section name, section symbol definitions (Linux) 

Replace hard-coded references to names to key section and section
 symbols with common macro definitions.

llvm-svn: 253897
This commit is contained in:
Xinliang David Li 2015-11-23 18:56:03 +00:00
parent 6376db52fe
commit 7c7f120178
1 changed files with 26 additions and 15 deletions
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41
compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
View File

@ -12,36 +12,47 @@
#if defined(__linux__) || defined(__FreeBSD__)
#include <stdlib.h>
extern __llvm_profile_data __start___llvm_prf_data LLVM_LIBRARY_VISIBILITY;
extern __llvm_profile_data __stop___llvm_prf_data LLVM_LIBRARY_VISIBILITY;
extern uint64_t __start___llvm_prf_cnts LLVM_LIBRARY_VISIBILITY;
extern uint64_t __stop___llvm_prf_cnts LLVM_LIBRARY_VISIBILITY;
extern char __start___llvm_prf_names LLVM_LIBRARY_VISIBILITY;
extern char __stop___llvm_prf_names LLVM_LIBRARY_VISIBILITY;
#define PROF_DATA_START INSTR_PROF_SECT_START(INSTR_PROF_DATA_SECT_NAME)
#define PROF_DATA_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_DATA_SECT_NAME)
#define PROF_NAME_START INSTR_PROF_SECT_START(INSTR_PROF_NAME_SECT_NAME)
#define PROF_NAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_NAME_SECT_NAME)
#define PROF_CNTS_START INSTR_PROF_SECT_START(INSTR_PROF_CNTS_SECT_NAME)
#define PROF_CNTS_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_CNTS_SECT_NAME)
/* Declare section start and stop symbols for various sections
* generated by compiler instrumentation.
*/
extern __llvm_profile_data PROF_DATA_START LLVM_LIBRARY_VISIBILITY;
extern __llvm_profile_data PROF_DATA_STOP LLVM_LIBRARY_VISIBILITY;
extern uint64_t PROF_CNTS_START LLVM_LIBRARY_VISIBILITY;
extern uint64_t PROF_CNTS_STOP LLVM_LIBRARY_VISIBILITY;
extern char PROF_NAME_START LLVM_LIBRARY_VISIBILITY;
extern char PROF_NAME_STOP LLVM_LIBRARY_VISIBILITY;
/* Add dummy data to ensure the section is always created. */
__llvm_profile_data __llvm_prof_sect_data[0] LLVM_SECTION("__llvm_prf_data");
uint64_t __llvm_prof_cnts_sect_data[0] LLVM_SECTION("__llvm_prf_cnts");
char __llvm_prof_nms_sect_data[0] LLVM_SECTION("__llvm_prf_names");
__llvm_profile_data
__prof_data_sect_data[0] LLVM_SECTION(INSTR_PROF_DATA_SECT_NAME_STR);
uint64_t __prof_cnts_sect_data[0] LLVM_SECTION(INSTR_PROF_CNTS_SECT_NAME_STR);
char __prof_nms_sect_data[0] LLVM_SECTION(INSTR_PROF_NAME_SECT_NAME_STR);
LLVM_LIBRARY_VISIBILITY const __llvm_profile_data *
__llvm_profile_begin_data(void) {
return &__start___llvm_prf_data;
return &PROF_DATA_START;
}
LLVM_LIBRARY_VISIBILITY const __llvm_profile_data *
__llvm_profile_end_data(void) {
return &__stop___llvm_prf_data;
return &PROF_DATA_STOP;
}
LLVM_LIBRARY_VISIBILITY const char *__llvm_profile_begin_names(void) {
return &__start___llvm_prf_names;
return &PROF_NAME_START;
}
LLVM_LIBRARY_VISIBILITY const char *__llvm_profile_end_names(void) {
return &__stop___llvm_prf_names;
return &PROF_NAME_STOP;
}
LLVM_LIBRARY_VISIBILITY uint64_t *__llvm_profile_begin_counters(void) {
return &__start___llvm_prf_cnts;
return &PROF_CNTS_START;
}
LLVM_LIBRARY_VISIBILITY uint64_t *__llvm_profile_end_counters(void) {
return &__stop___llvm_prf_cnts;
return &PROF_CNTS_STOP;
}
#endif