e50a38840d
This patch adds binary id into profiles to easily associate binaries with the corresponding profiles. There is an RFC that discusses the motivation, design and implementation in more detail: https://lists.llvm.org/pipermail/llvm-dev/2021-June/151154.html Differential Revision: https://reviews.llvm.org/D102039
106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
/*===- InstrProfilingPlatformOther.c - Profile data default 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(__APPLE__) && !defined(__linux__) && !defined(__FreeBSD__) && \
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!(defined(__sun__) && defined(__svr4__)) && !defined(__NetBSD__) && \
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!defined(_WIN32)
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#include <stdlib.h>
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#include <stdio.h>
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#include "InstrProfiling.h"
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#include "InstrProfilingInternal.h"
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static const __llvm_profile_data *DataFirst = NULL;
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static const __llvm_profile_data *DataLast = NULL;
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static const char *NamesFirst = NULL;
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static const char *NamesLast = NULL;
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static uint64_t *CountersFirst = NULL;
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static uint64_t *CountersLast = NULL;
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static uint32_t *OrderFileFirst = NULL;
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static const void *getMinAddr(const void *A1, const void *A2) {
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return A1 < A2 ? A1 : A2;
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}
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static const void *getMaxAddr(const void *A1, const void *A2) {
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return A1 > A2 ? A1 : A2;
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}
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/*!
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* \brief Register an instrumented function.
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*
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* Calls to this are emitted by clang with -fprofile-instr-generate. Such
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* calls are only required (and only emitted) on targets where we haven't
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* implemented linker magic to find the bounds of the sections.
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*/
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COMPILER_RT_VISIBILITY
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void __llvm_profile_register_function(void *Data_) {
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/* TODO: Only emit this function if we can't use linker magic. */
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const __llvm_profile_data *Data = (__llvm_profile_data *)Data_;
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if (!DataFirst) {
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DataFirst = Data;
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DataLast = Data + 1;
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CountersFirst = Data->CounterPtr;
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CountersLast = (uint64_t *)Data->CounterPtr + Data->NumCounters;
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return;
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}
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DataFirst = (const __llvm_profile_data *)getMinAddr(DataFirst, Data);
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CountersFirst = (uint64_t *)getMinAddr(CountersFirst, Data->CounterPtr);
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DataLast = (const __llvm_profile_data *)getMaxAddr(DataLast, Data + 1);
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CountersLast = (uint64_t *)getMaxAddr(
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CountersLast, (uint64_t *)Data->CounterPtr + Data->NumCounters);
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}
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COMPILER_RT_VISIBILITY
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void __llvm_profile_register_names_function(void *NamesStart,
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uint64_t NamesSize) {
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if (!NamesFirst) {
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NamesFirst = (const char *)NamesStart;
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NamesLast = (const char *)NamesStart + NamesSize;
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return;
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}
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NamesFirst = (const char *)getMinAddr(NamesFirst, NamesStart);
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NamesLast =
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(const char *)getMaxAddr(NamesLast, (const char *)NamesStart + NamesSize);
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}
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COMPILER_RT_VISIBILITY
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const __llvm_profile_data *__llvm_profile_begin_data(void) { return DataFirst; }
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COMPILER_RT_VISIBILITY
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const __llvm_profile_data *__llvm_profile_end_data(void) { return DataLast; }
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COMPILER_RT_VISIBILITY
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const char *__llvm_profile_begin_names(void) { return NamesFirst; }
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COMPILER_RT_VISIBILITY
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const char *__llvm_profile_end_names(void) { return NamesLast; }
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COMPILER_RT_VISIBILITY
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uint64_t *__llvm_profile_begin_counters(void) { return CountersFirst; }
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COMPILER_RT_VISIBILITY
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uint64_t *__llvm_profile_end_counters(void) { return CountersLast; }
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/* TODO: correctly set up OrderFileFirst. */
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COMPILER_RT_VISIBILITY
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uint32_t *__llvm_profile_begin_orderfile(void) { return OrderFileFirst; }
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COMPILER_RT_VISIBILITY
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ValueProfNode *__llvm_profile_begin_vnodes(void) {
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return 0;
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}
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COMPILER_RT_VISIBILITY
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ValueProfNode *__llvm_profile_end_vnodes(void) { return 0; }
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COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = 0;
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COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = 0;
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COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
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return 0;
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}
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#endif
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