2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
133 lines
5.1 KiB
C
133 lines
5.1 KiB
C
/*===- InstrProfilingMerge.c - Profile in-process Merging ---------------===*\
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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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|* This file defines the API needed for in-process merging of profile data
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|* stored in memory buffer.
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\*===---------------------------------------------------------------------===*/
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#include "InstrProfiling.h"
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#include "InstrProfilingInternal.h"
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#include "InstrProfilingUtil.h"
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#define INSTR_PROF_VALUE_PROF_DATA
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#include "InstrProfData.inc"
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COMPILER_RT_VISIBILITY
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void (*VPMergeHook)(ValueProfData *, __llvm_profile_data *);
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COMPILER_RT_VISIBILITY
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uint64_t lprofGetLoadModuleSignature() {
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/* A very fast way to compute a module signature. */
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uint64_t CounterSize = (uint64_t)(__llvm_profile_end_counters() -
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__llvm_profile_begin_counters());
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uint64_t DataSize = __llvm_profile_get_data_size(__llvm_profile_begin_data(),
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__llvm_profile_end_data());
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uint64_t NamesSize =
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(uint64_t)(__llvm_profile_end_names() - __llvm_profile_begin_names());
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uint64_t NumVnodes =
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(uint64_t)(__llvm_profile_end_vnodes() - __llvm_profile_begin_vnodes());
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const __llvm_profile_data *FirstD = __llvm_profile_begin_data();
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return (NamesSize << 40) + (CounterSize << 30) + (DataSize << 20) +
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(NumVnodes << 10) + (DataSize > 0 ? FirstD->NameRef : 0);
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}
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/* Returns 1 if profile is not structurally compatible. */
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COMPILER_RT_VISIBILITY
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int __llvm_profile_check_compatibility(const char *ProfileData,
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uint64_t ProfileSize) {
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/* Check profile header only for now */
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__llvm_profile_header *Header = (__llvm_profile_header *)ProfileData;
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__llvm_profile_data *SrcDataStart, *SrcDataEnd, *SrcData, *DstData;
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SrcDataStart =
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(__llvm_profile_data *)(ProfileData + sizeof(__llvm_profile_header));
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SrcDataEnd = SrcDataStart + Header->DataSize;
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if (ProfileSize < sizeof(__llvm_profile_header))
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return 1;
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/* Check the header first. */
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if (Header->Magic != __llvm_profile_get_magic() ||
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Header->Version != __llvm_profile_get_version() ||
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Header->DataSize !=
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__llvm_profile_get_data_size(__llvm_profile_begin_data(),
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__llvm_profile_end_data()) ||
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Header->CountersSize != (uint64_t)(__llvm_profile_end_counters() -
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__llvm_profile_begin_counters()) ||
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Header->NamesSize != (uint64_t)(__llvm_profile_end_names() -
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__llvm_profile_begin_names()) ||
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Header->ValueKindLast != IPVK_Last)
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return 1;
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if (ProfileSize < sizeof(__llvm_profile_header) +
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Header->DataSize * sizeof(__llvm_profile_data) +
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Header->NamesSize + Header->CountersSize)
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return 1;
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for (SrcData = SrcDataStart,
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DstData = (__llvm_profile_data *)__llvm_profile_begin_data();
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SrcData < SrcDataEnd; ++SrcData, ++DstData) {
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if (SrcData->NameRef != DstData->NameRef ||
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SrcData->FuncHash != DstData->FuncHash ||
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SrcData->NumCounters != DstData->NumCounters)
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return 1;
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}
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/* Matched! */
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return 0;
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}
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COMPILER_RT_VISIBILITY
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void __llvm_profile_merge_from_buffer(const char *ProfileData,
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uint64_t ProfileSize) {
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__llvm_profile_data *SrcDataStart, *SrcDataEnd, *SrcData, *DstData;
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__llvm_profile_header *Header = (__llvm_profile_header *)ProfileData;
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uint64_t *SrcCountersStart;
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const char *SrcNameStart;
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ValueProfData *SrcValueProfDataStart, *SrcValueProfData;
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SrcDataStart =
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(__llvm_profile_data *)(ProfileData + sizeof(__llvm_profile_header));
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SrcDataEnd = SrcDataStart + Header->DataSize;
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SrcCountersStart = (uint64_t *)SrcDataEnd;
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SrcNameStart = (const char *)(SrcCountersStart + Header->CountersSize);
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SrcValueProfDataStart =
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(ValueProfData *)(SrcNameStart + Header->NamesSize +
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__llvm_profile_get_num_padding_bytes(
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Header->NamesSize));
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for (SrcData = SrcDataStart,
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DstData = (__llvm_profile_data *)__llvm_profile_begin_data(),
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SrcValueProfData = SrcValueProfDataStart;
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SrcData < SrcDataEnd; ++SrcData, ++DstData) {
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uint64_t *SrcCounters;
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uint64_t *DstCounters = (uint64_t *)DstData->CounterPtr;
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unsigned I, NC, NVK = 0;
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NC = SrcData->NumCounters;
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SrcCounters = SrcCountersStart +
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((size_t)SrcData->CounterPtr - Header->CountersDelta) /
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sizeof(uint64_t);
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for (I = 0; I < NC; I++)
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DstCounters[I] += SrcCounters[I];
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/* Now merge value profile data. */
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if (!VPMergeHook)
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continue;
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for (I = 0; I <= IPVK_Last; I++)
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NVK += (SrcData->NumValueSites[I] != 0);
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if (!NVK)
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continue;
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VPMergeHook(SrcValueProfData, DstData);
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SrcValueProfData = (ValueProfData *)((char *)SrcValueProfData +
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SrcValueProfData->TotalSize);
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}
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}
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