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/*
* Copyright (C) 2023 The Android Open Source Project
*
* 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.
*/
#pragma once
#include "ETMDecoder.h"
#include "RegEx.h"
#include "thread_tree.h"
#include "utils.h"
namespace simpleperf {
// When processing binary info in an input file, the binaries are identified by their path.
// But this isn't sufficient when merging binary info from multiple input files. Because
// binaries for the same path may be changed between generating input files. So after processing
// each input file, we create BinaryKeys to identify binaries, which consider path, build_id and
// kernel_start_addr (for vmlinux). kernel_start_addr affects how addresses in ETMBinary
// are interpreted for vmlinux.
struct BinaryKey {
std::string path;
BuildId build_id;
uint64_t kernel_start_addr = 0;
BinaryKey() {}
BinaryKey(const std::string& path, BuildId build_id) : path(path), build_id(build_id) {}
BinaryKey(const Dso* dso, uint64_t kernel_start_addr) : path(dso->Path()) {
build_id = Dso::FindExpectedBuildIdForPath(dso->Path());
if (dso->type() == DSO_KERNEL) {
this->kernel_start_addr = kernel_start_addr;
}
}
bool operator==(const BinaryKey& other) const {
return path == other.path && build_id == other.build_id &&
kernel_start_addr == other.kernel_start_addr;
}
};
struct BinaryKeyHash {
size_t operator()(const BinaryKey& key) const noexcept {
size_t seed = 0;
HashCombine(seed, key.path);
HashCombine(seed, key.build_id);
if (key.kernel_start_addr != 0) {
HashCombine(seed, key.kernel_start_addr);
}
return seed;
}
};
class BinaryFilter {
public:
BinaryFilter(const RegEx* binary_name_regex) : binary_name_regex_(binary_name_regex) {}
void SetRegex(const RegEx* binary_name_regex) {
binary_name_regex_ = binary_name_regex;
dso_filter_cache_.clear();
}
bool Filter(const Dso* dso) {
auto lookup = dso_filter_cache_.find(dso);
if (lookup != dso_filter_cache_.end()) {
return lookup->second;
}
bool match = Filter(dso->Path());
dso_filter_cache_.insert({dso, match});
return match;
}
bool Filter(const std::string& path) {
return binary_name_regex_ == nullptr || binary_name_regex_->Search(path);
}
private:
const RegEx* binary_name_regex_;
std::unordered_map<const Dso*, bool> dso_filter_cache_;
};
using UnorderedETMBranchMap =
std::unordered_map<uint64_t, std::unordered_map<std::vector<bool>, uint64_t>>;
struct ETMBinary {
DsoType dso_type;
UnorderedETMBranchMap branch_map;
void Merge(const ETMBinary& other) {
for (auto& other_p : other.branch_map) {
auto it = branch_map.find(other_p.first);
if (it == branch_map.end()) {
branch_map[other_p.first] = std::move(other_p.second);
} else {
auto& map2 = it->second;
for (auto& other_p2 : other_p.second) {
auto it2 = map2.find(other_p2.first);
if (it2 == map2.end()) {
map2[other_p2.first] = other_p2.second;
} else {
OverflowSafeAdd(it2->second, other_p2.second);
}
}
}
}
}
ETMBranchMap GetOrderedBranchMap() const {
ETMBranchMap result;
for (const auto& p : branch_map) {
uint64_t addr = p.first;
const auto& b_map = p.second;
result[addr] = std::map<std::vector<bool>, uint64_t>(b_map.begin(), b_map.end());
}
return result;
}
};
using ETMBinaryMap = std::unordered_map<BinaryKey, ETMBinary, BinaryKeyHash>;
bool ETMBinaryMapToString(const ETMBinaryMap& binary_map, std::string& s);
bool StringToETMBinaryMap(const std::string& s, ETMBinaryMap& binary_map);
// Convert ETM data into branch lists while recording.
class ETMBranchListGenerator {
public:
static std::unique_ptr<ETMBranchListGenerator> Create(bool dump_maps_from_proc);
virtual ~ETMBranchListGenerator();
virtual void SetExcludePid(pid_t pid) = 0;
virtual void SetBinaryFilter(const RegEx* binary_name_regex) = 0;
virtual bool ProcessRecord(const Record& r, bool& consumed) = 0;
virtual ETMBinaryMap GetETMBinaryMap() = 0;
};
struct LBRBranch {
// If from_binary_id >= 1, it refers to LBRData.binaries[from_binary_id - 1]. Otherwise, it's
// invalid.
uint32_t from_binary_id = 0;
// If to_binary_id >= 1, it refers to LBRData.binaries[to_binary_id - 1]. Otherwise, it's invalid.
uint32_t to_binary_id = 0;
uint64_t from_vaddr_in_file = 0;
uint64_t to_vaddr_in_file = 0;
};
struct LBRSample {
// If binary_id >= 1, it refers to LBRData.binaries[binary_id - 1]. Otherwise, it's invalid.
uint32_t binary_id = 0;
uint64_t vaddr_in_file = 0;
std::vector<LBRBranch> branches;
};
struct LBRData {
std::vector<LBRSample> samples;
std::vector<BinaryKey> binaries;
};
bool LBRDataToString(const LBRData& data, std::string& s);
bool ParseBranchListData(const std::string& s, ETMBinaryMap& etm_data, LBRData& lbr_data);
// for testing
std::string ETMBranchToProtoString(const std::vector<bool>& branch);
std::vector<bool> ProtoStringToETMBranch(const std::string& s, size_t bit_size);
} // namespace simpleperf
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