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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/basic-block-profiler.h"
#include <algorithm>
#include <numeric>
#include <sstream>
#include "src/base/lazy-instance.h"
namespace v8 {
namespace internal {
namespace {
base::LazyInstance<BasicBlockProfiler>::type kBasicBlockProfiler =
LAZY_INSTANCE_INITIALIZER;
}
BasicBlockProfiler* BasicBlockProfiler::Get() {
return kBasicBlockProfiler.Pointer();
}
BasicBlockProfiler::Data::Data(size_t n_blocks)
: n_blocks_(n_blocks),
block_rpo_numbers_(n_blocks_),
counts_(n_blocks_, 0) {}
BasicBlockProfiler::Data::~Data() {}
static void InsertIntoString(std::ostringstream* os, std::string* string) {
string->insert(0, os->str());
}
static void InsertIntoString(const char* data, std::string* string) {
string->insert(0, data);
}
void BasicBlockProfiler::Data::SetCode(std::ostringstream* os) {
InsertIntoString(os, &code_);
}
void BasicBlockProfiler::Data::SetFunctionName(std::unique_ptr<char[]> name) {
InsertIntoString(name.get(), &function_name_);
}
void BasicBlockProfiler::Data::SetSchedule(std::ostringstream* os) {
InsertIntoString(os, &schedule_);
}
void BasicBlockProfiler::Data::SetBlockRpoNumber(size_t offset,
int32_t block_rpo) {
DCHECK(offset < n_blocks_);
block_rpo_numbers_[offset] = block_rpo;
}
intptr_t BasicBlockProfiler::Data::GetCounterAddress(size_t offset) {
DCHECK(offset < n_blocks_);
return reinterpret_cast<intptr_t>(&(counts_[offset]));
}
void BasicBlockProfiler::Data::ResetCounts() {
for (size_t i = 0; i < n_blocks_; ++i) {
counts_[i] = 0;
}
}
BasicBlockProfiler::BasicBlockProfiler() {}
BasicBlockProfiler::Data* BasicBlockProfiler::NewData(size_t n_blocks) {
base::LockGuard<base::Mutex> lock(&data_list_mutex_);
Data* data = new Data(n_blocks);
data_list_.push_back(data);
return data;
}
BasicBlockProfiler::~BasicBlockProfiler() {
for (DataList::iterator i = data_list_.begin(); i != data_list_.end(); ++i) {
delete (*i);
}
}
void BasicBlockProfiler::ResetCounts() {
for (DataList::iterator i = data_list_.begin(); i != data_list_.end(); ++i) {
(*i)->ResetCounts();
}
}
std::ostream& operator<<(std::ostream& os, const BasicBlockProfiler& p) {
os << "---- Start Profiling Data ----" << std::endl;
typedef BasicBlockProfiler::DataList::const_iterator iterator;
for (iterator i = p.data_list_.begin(); i != p.data_list_.end(); ++i) {
os << **i;
}
os << "---- End Profiling Data ----" << std::endl;
return os;
}
std::ostream& operator<<(std::ostream& os, const BasicBlockProfiler::Data& d) {
int block_count_sum = std::accumulate(d.counts_.begin(), d.counts_.end(), 0);
if (block_count_sum == 0) return os;
const char* name = "unknown function";
if (!d.function_name_.empty()) {
name = d.function_name_.c_str();
}
if (!d.schedule_.empty()) {
os << "schedule for " << name << " (B0 entered " << d.counts_[0]
<< " times)" << std::endl;
os << d.schedule_.c_str() << std::endl;
}
os << "block counts for " << name << ":" << std::endl;
std::vector<std::pair<int32_t, uint32_t>> pairs;
pairs.reserve(d.n_blocks_);
for (size_t i = 0; i < d.n_blocks_; ++i) {
pairs.push_back(std::make_pair(d.block_rpo_numbers_[i], d.counts_[i]));
}
std::sort(pairs.begin(), pairs.end(),
[=](std::pair<int32_t, uint32_t> left,
std::pair<int32_t, uint32_t> right) {
if (right.second == left.second)
return left.first < right.first;
return right.second < left.second;
});
for (auto it : pairs) {
if (it.second == 0) break;
os << "block B" << it.first << " : " << it.second << std::endl;
}
os << std::endl;
if (!d.code_.empty()) {
os << d.code_.c_str() << std::endl;
}
return os;
}
} // namespace internal
} // namespace v8
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