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// Copyright 2014 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Class to represent source level profile.
#include "profile.h"
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "base/common.h"
#include "instruction_map.h"
#include "symbol_map.h"
#include "sample_reader.h"
DEFINE_bool(use_lbr, true,
"Whether to use lbr profile.");
namespace autofdo {
Profile::ProfileMaps *Profile::GetProfileMaps(uint64 addr) {
const string *name;
uint64 start_addr, end_addr;
if (symbol_map_->GetSymbolInfoByAddr(addr, &name,
&start_addr, &end_addr)) {
std::pair<SymbolProfileMaps::iterator, bool> ret =
symbol_profile_maps_.insert(SymbolProfileMaps::value_type(*name, NULL));
if (ret.second) {
ret.first->second = new ProfileMaps(start_addr, end_addr);
}
return ret.first->second;
} else {
return NULL;
}
}
void Profile::AggregatePerFunctionProfile() {
uint64 start = symbol_map_->base_addr();
const AddressCountMap *count_map = &sample_reader_->address_count_map();
for (const auto &addr_count : *count_map) {
ProfileMaps *maps = GetProfileMaps(addr_count.first + start);
if (maps != NULL) {
maps->address_count_map[addr_count.first + start] += addr_count.second;
}
}
const RangeCountMap *range_map = &sample_reader_->range_count_map();
for (const auto &range_count : *range_map) {
ProfileMaps *maps = GetProfileMaps(range_count.first.first + start);
if (maps != NULL) {
maps->range_count_map[std::make_pair(range_count.first.first + start,
range_count.first.second + start)] +=
range_count.second;
}
}
const BranchCountMap *branch_map = &sample_reader_->branch_count_map();
for (const auto &branch_count : *branch_map) {
ProfileMaps *maps = GetProfileMaps(branch_count.first.first + start);
if (maps != NULL) {
maps->branch_count_map[std::make_pair(
branch_count.first.first + start,
branch_count.first.second + start)] += branch_count.second;
}
}
}
uint64 Profile::ProfileMaps::GetAggregatedCount() const {
uint64 ret = 0;
if (range_count_map.size() > 0) {
for (const auto &range_count : range_count_map) {
ret += range_count.second * (range_count.first.second -
range_count.first.first);
}
} else {
for (const auto &addr_count : address_count_map) {
ret += addr_count.second;
}
}
return ret;
}
void Profile::ProcessPerFunctionProfile(string func_name,
const ProfileMaps &maps) {
InstructionMap inst_map(addr2line_, symbol_map_);
inst_map.BuildPerFunctionInstructionMap(func_name, maps.start_addr,
maps.end_addr);
AddressCountMap map;
const AddressCountMap *map_ptr;
if (FLAGS_use_lbr) {
if (maps.range_count_map.size() == 0) {
return;
}
for (const auto &range_count : maps.range_count_map) {
for (InstructionMap::InstMap::const_iterator iter =
inst_map.inst_map().find(range_count.first.first);
iter != inst_map.inst_map().end()
&& iter->first <= range_count.first.second;
++iter) {
map[iter->first] += range_count.second;
}
}
map_ptr = ↦
} else {
map_ptr = &maps.address_count_map;
}
for (const auto &address_count : *map_ptr) {
InstructionMap::InstMap::const_iterator iter =
inst_map.inst_map().find(address_count.first);
if (iter == inst_map.inst_map().end()) {
continue;
}
const InstructionMap::InstInfo *info = iter->second;
if (info == NULL) {
continue;
}
if (info->source_stack.size() > 0) {
symbol_map_->AddSourceCount(
func_name, info->source_stack,
address_count.second * info->source_stack[0].DuplicationFactor(), 0,
SymbolMap::MAX);
}
}
for (const auto &branch_count : maps.branch_count_map) {
InstructionMap::InstMap::const_iterator iter =
inst_map.inst_map().find(branch_count.first.first);
if (iter == inst_map.inst_map().end()) {
continue;
}
const InstructionMap::InstInfo *info = iter->second;
if (info == NULL) {
continue;
}
const string *callee = symbol_map_->GetSymbolNameByStartAddr(
branch_count.first.second);
if (!callee) {
continue;
}
if (symbol_map_->map().count(*callee)) {
symbol_map_->AddSymbolEntryCount(*callee, branch_count.second);
symbol_map_->AddIndirectCallTarget(func_name, info->source_stack,
*callee, branch_count.second);
}
}
for (const auto &addr_count : *map_ptr) {
global_addr_count_map_[addr_count.first] = addr_count.second;
}
}
void Profile::ComputeProfile() {
symbol_map_->CalculateThresholdFromTotalCount(
sample_reader_->GetTotalCount());
AggregatePerFunctionProfile();
// First add all symbols that needs to be outputted to the symbol_map_. We
// need to do this before hand because ProcessPerFunctionProfile will call
// AddSymbolEntryCount for other symbols, which may or may not had been
// processed by ProcessPerFunctionProfile.
for (const auto &symbol_profile : symbol_profile_maps_) {
if (symbol_map_->ShouldEmit(symbol_profile.second->GetAggregatedCount()))
symbol_map_->AddSymbol(symbol_profile.first);
}
// Traverse the symbol map to process the profiles.
for (const auto &symbol_profile : symbol_profile_maps_) {
if (symbol_map_->ShouldEmit(symbol_profile.second->GetAggregatedCount()))
ProcessPerFunctionProfile(symbol_profile.first, *symbol_profile.second);
}
symbol_map_->Merge();
symbol_map_->ComputeWorkingSets();
}
Profile::~Profile() {
for (auto &symbol_maps : symbol_profile_maps_) {
delete symbol_maps.second;
}
}
} // namespace autofdo
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