dc93b1127c
They were added so that if no metadata section is present, `__start_llvm_prf_*` references would not cause "undefined symbol" errors. By switching to undefined weak symbols in D96936, the dummy sections are not needed. This patch is also needed to work around https://sourceware.org/bugzilla/show_bug.cgi?id=27490 Differential Revision: https://reviews.llvm.org/D97648
76 lines
3.0 KiB
C
76 lines
3.0 KiB
C
/*===- InstrProfilingPlatformLinux.c - Profile data Linux platform ------===*\
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|*
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|* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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|* See https://llvm.org/LICENSE.txt for license information.
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|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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|*
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\*===----------------------------------------------------------------------===*/
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#if defined(__linux__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
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(defined(__sun__) && defined(__svr4__)) || defined(__NetBSD__)
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#include <stdlib.h>
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#include "InstrProfiling.h"
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#define PROF_DATA_START INSTR_PROF_SECT_START(INSTR_PROF_DATA_COMMON)
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#define PROF_DATA_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_DATA_COMMON)
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#define PROF_NAME_START INSTR_PROF_SECT_START(INSTR_PROF_NAME_COMMON)
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#define PROF_NAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_NAME_COMMON)
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#define PROF_CNTS_START INSTR_PROF_SECT_START(INSTR_PROF_CNTS_COMMON)
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#define PROF_CNTS_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_CNTS_COMMON)
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#define PROF_ORDERFILE_START INSTR_PROF_SECT_START(INSTR_PROF_ORDERFILE_COMMON)
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#define PROF_VNODES_START INSTR_PROF_SECT_START(INSTR_PROF_VNODES_COMMON)
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#define PROF_VNODES_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_VNODES_COMMON)
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/* Declare section start and stop symbols for various sections
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* generated by compiler instrumentation.
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*/
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extern __llvm_profile_data PROF_DATA_START COMPILER_RT_VISIBILITY
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COMPILER_RT_WEAK;
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extern __llvm_profile_data PROF_DATA_STOP COMPILER_RT_VISIBILITY
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COMPILER_RT_WEAK;
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extern uint64_t PROF_CNTS_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
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extern uint64_t PROF_CNTS_STOP COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
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extern uint32_t PROF_ORDERFILE_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
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extern char PROF_NAME_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
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extern char PROF_NAME_STOP COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
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extern ValueProfNode PROF_VNODES_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
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extern ValueProfNode PROF_VNODES_STOP COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
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COMPILER_RT_VISIBILITY const __llvm_profile_data *
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__llvm_profile_begin_data(void) {
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return &PROF_DATA_START;
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}
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COMPILER_RT_VISIBILITY const __llvm_profile_data *
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__llvm_profile_end_data(void) {
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return &PROF_DATA_STOP;
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}
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COMPILER_RT_VISIBILITY const char *__llvm_profile_begin_names(void) {
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return &PROF_NAME_START;
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}
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COMPILER_RT_VISIBILITY const char *__llvm_profile_end_names(void) {
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return &PROF_NAME_STOP;
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}
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COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_begin_counters(void) {
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return &PROF_CNTS_START;
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}
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COMPILER_RT_VISIBILITY uint64_t *__llvm_profile_end_counters(void) {
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return &PROF_CNTS_STOP;
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}
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COMPILER_RT_VISIBILITY uint32_t *__llvm_profile_begin_orderfile(void) {
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return &PROF_ORDERFILE_START;
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}
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COMPILER_RT_VISIBILITY ValueProfNode *
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__llvm_profile_begin_vnodes(void) {
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return &PROF_VNODES_START;
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}
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COMPILER_RT_VISIBILITY ValueProfNode *__llvm_profile_end_vnodes(void) {
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return &PROF_VNODES_STOP;
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}
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COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &PROF_VNODES_START;
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COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &PROF_VNODES_STOP;
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#endif
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