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|
/*===- InstrProfilingMerge.c - Profile in-process Merging ---------------===*\
|*
|* The LLVM Compiler Infrastructure
|*
|* This file is distributed under the University of Illinois Open Source
|* License. See LICENSE.TXT for details.
|*
|*===----------------------------------------------------------------------===*
|* This file defines the API needed for in-process merging of profile data
|* stored in memory buffer.
\*===---------------------------------------------------------------------===*/
#include "InstrProfiling.h"
#include "InstrProfilingInternal.h"
#include "InstrProfilingUtil.h"
#define INSTR_PROF_VALUE_PROF_DATA
#include "InstrProfData.inc"
COMPILER_RT_WEAK void (*VPMergeHook)(ValueProfData *,
__llvm_profile_data *) = NULL;
COMPILER_RT_VISIBILITY
uint64_t lprofGetLoadModuleSignature() {
/* A very fast way to compute a module signature. */
uint64_t CounterSize = (uint64_t)(__llvm_profile_end_counters() -
__llvm_profile_begin_counters());
uint64_t DataSize = __llvm_profile_get_data_size(__llvm_profile_begin_data(),
__llvm_profile_end_data());
uint64_t NamesSize =
(uint64_t)(__llvm_profile_end_names() - __llvm_profile_begin_names());
uint64_t NumVnodes =
(uint64_t)(__llvm_profile_end_vnodes() - __llvm_profile_begin_vnodes());
const __llvm_profile_data *FirstD = __llvm_profile_begin_data();
return (NamesSize << 40) + (CounterSize << 30) + (DataSize << 20) +
(NumVnodes << 10) + (DataSize > 0 ? FirstD->NameRef : 0);
}
/* Returns 1 if profile is not structurally compatible. */
COMPILER_RT_VISIBILITY
int __llvm_profile_check_compatibility(const char *ProfileData,
uint64_t ProfileSize) {
/* Check profile header only for now */
__llvm_profile_header *Header = (__llvm_profile_header *)ProfileData;
__llvm_profile_data *SrcDataStart, *SrcDataEnd, *SrcData, *DstData;
SrcDataStart =
(__llvm_profile_data *)(ProfileData + sizeof(__llvm_profile_header));
SrcDataEnd = SrcDataStart + Header->DataSize;
if (ProfileSize < sizeof(__llvm_profile_header))
return 1;
/* Check the header first. */
if (Header->Magic != __llvm_profile_get_magic() ||
Header->Version != __llvm_profile_get_version() ||
Header->DataSize !=
__llvm_profile_get_data_size(__llvm_profile_begin_data(),
__llvm_profile_end_data()) ||
Header->CountersSize != (uint64_t)(__llvm_profile_end_counters() -
__llvm_profile_begin_counters()) ||
Header->NamesSize != (uint64_t)(__llvm_profile_end_names() -
__llvm_profile_begin_names()) ||
Header->ValueKindLast != IPVK_Last)
return 1;
if (ProfileSize < sizeof(__llvm_profile_header) +
Header->DataSize * sizeof(__llvm_profile_data) +
Header->NamesSize + Header->CountersSize)
return 1;
for (SrcData = SrcDataStart,
DstData = (__llvm_profile_data *)__llvm_profile_begin_data();
SrcData < SrcDataEnd; ++SrcData, ++DstData) {
if (SrcData->NameRef != DstData->NameRef ||
SrcData->FuncHash != DstData->FuncHash ||
SrcData->NumCounters != DstData->NumCounters)
return 1;
}
/* Matched! */
return 0;
}
COMPILER_RT_VISIBILITY
void __llvm_profile_merge_from_buffer(const char *ProfileData,
uint64_t ProfileSize) {
__llvm_profile_data *SrcDataStart, *SrcDataEnd, *SrcData, *DstData;
__llvm_profile_header *Header = (__llvm_profile_header *)ProfileData;
uint64_t *SrcCountersStart;
const char *SrcNameStart;
ValueProfData *SrcValueProfDataStart, *SrcValueProfData;
SrcDataStart =
(__llvm_profile_data *)(ProfileData + sizeof(__llvm_profile_header));
SrcDataEnd = SrcDataStart + Header->DataSize;
SrcCountersStart = (uint64_t *)SrcDataEnd;
SrcNameStart = (const char *)(SrcCountersStart + Header->CountersSize);
SrcValueProfDataStart =
(ValueProfData *)(SrcNameStart + Header->NamesSize +
__llvm_profile_get_num_padding_bytes(
Header->NamesSize));
for (SrcData = SrcDataStart,
DstData = (__llvm_profile_data *)__llvm_profile_begin_data(),
SrcValueProfData = SrcValueProfDataStart;
SrcData < SrcDataEnd; ++SrcData, ++DstData) {
uint64_t *SrcCounters;
uint64_t *DstCounters = (uint64_t *)DstData->CounterPtr;
unsigned I, NC, NVK = 0;
NC = SrcData->NumCounters;
SrcCounters = SrcCountersStart +
((size_t)SrcData->CounterPtr - Header->CountersDelta) /
sizeof(uint64_t);
for (I = 0; I < NC; I++)
DstCounters[I] += SrcCounters[I];
/* Now merge value profile data. */
if (!VPMergeHook)
continue;
for (I = 0; I <= IPVK_Last; I++)
NVK += (SrcData->NumValueSites[I] != 0);
if (!NVK)
continue;
VPMergeHook(SrcValueProfData, DstData);
SrcValueProfData = (ValueProfData *)((char *)SrcValueProfData +
SrcValueProfData->TotalSize);
}
}
|
