blob: 2d22cbdb5e111a8e87c0065e91c9725378694958 [file] [log] [blame]
/*
* Copyright (C) 2018 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.
*/
#include "tools/ftrace_proto_gen/proto_gen_utils.h"
#include <fcntl.h>
#include <sys/wait.h>
#include <unistd.h>
#include <algorithm>
#include <fstream>
#include <regex>
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/file_utils.h"
#include "perfetto/ext/base/pipe.h"
#include "perfetto/ext/base/string_splitter.h"
#include "perfetto/ext/base/string_utils.h"
#include "perfetto/ext/base/subprocess.h"
namespace perfetto {
namespace {
std::string RunClangFmt(const std::string& input) {
#if PERFETTO_BUILDFLAG(PERFETTO_OS_MAC)
const std::string platform = "mac";
#else
const std::string platform = "linux64";
#endif
base::Subprocess clang_fmt({"buildtools/" + platform + "/clang-format"});
clang_fmt.args.stdout_mode = base::Subprocess::kBuffer;
clang_fmt.args.stderr_mode = base::Subprocess::kInherit;
clang_fmt.args.input = input;
PERFETTO_CHECK(clang_fmt.Call());
return std::move(clang_fmt.output());
}
} // namespace
using base::Contains;
using base::EndsWith;
using base::StartsWith;
using base::Uppercase;
VerifyStream::VerifyStream(std::string filename)
: filename_(std::move(filename)) {
PERFETTO_CHECK(base::ReadFile(filename_, &expected_));
}
VerifyStream::~VerifyStream() {
std::string tidied = str();
if (EndsWith(filename_, "cc") || EndsWith(filename_, "proto"))
tidied = RunClangFmt(str());
if (expected_ != tidied) {
PERFETTO_FATAL("%s is out of date. Please run tools/run_ftrace_proto_gen.",
filename_.c_str());
}
}
FtraceEventName::FtraceEventName(const std::string& full_name) {
if (full_name.rfind("removed", 0) != std::string::npos) {
valid_ = false;
return;
}
name_ = full_name.substr(full_name.find('/') + 1, std::string::npos);
group_ = full_name.substr(0, full_name.find('/'));
valid_ = true;
}
bool FtraceEventName::valid() const {
return valid_;
}
const std::string& FtraceEventName::name() const {
PERFETTO_CHECK(valid_);
return name_;
}
const std::string& FtraceEventName::group() const {
PERFETTO_CHECK(valid_);
return group_;
}
std::string ToCamelCase(const std::string& s) {
std::string result;
result.reserve(s.size());
bool upperCaseNextChar = true;
for (size_t i = 0; i < s.size(); i++) {
char c = s[i];
if (c == '_') {
upperCaseNextChar = true;
continue;
}
if (upperCaseNextChar) {
upperCaseNextChar = false;
c = Uppercase(c);
}
result.push_back(c);
}
return result;
}
ProtoType ProtoType::GetSigned() const {
PERFETTO_CHECK(type == NUMERIC);
if (is_signed)
return *this;
if (size == 64) {
return Numeric(64, true);
}
return Numeric(2 * size, true);
}
std::string ProtoType::ToString() const {
switch (type) {
case INVALID:
PERFETTO_CHECK(false);
case STRING:
return "string";
case NUMERIC: {
std::string s;
if (!is_signed)
s += "u";
s += "int";
s += std::to_string(size);
return s;
}
}
PERFETTO_CHECK(false); // for GCC.
}
// static
ProtoType ProtoType::String() {
return {STRING, 0, false};
}
// static
ProtoType ProtoType::Invalid() {
return {INVALID, 0, false};
}
// static
ProtoType ProtoType::Numeric(uint16_t size, bool is_signed) {
PERFETTO_CHECK(size == 32 || size == 64);
return {NUMERIC, size, is_signed};
}
// static
ProtoType ProtoType::FromDescriptor(
google::protobuf::FieldDescriptor::Type type) {
if (type == google::protobuf::FieldDescriptor::Type::TYPE_UINT64)
return Numeric(64, false);
if (type == google::protobuf::FieldDescriptor::Type::TYPE_INT64)
return Numeric(64, true);
if (type == google::protobuf::FieldDescriptor::Type::TYPE_UINT32)
return Numeric(32, false);
if (type == google::protobuf::FieldDescriptor::Type::TYPE_INT32)
return Numeric(32, true);
if (type == google::protobuf::FieldDescriptor::Type::TYPE_STRING)
return String();
return Invalid();
}
ProtoType GetCommon(ProtoType one, ProtoType other) {
// Always need to prefer the LHS as it is the one already present
// in the proto.
if (one.type == ProtoType::STRING)
return ProtoType::String();
if (one.is_signed || other.is_signed) {
one = one.GetSigned();
other = other.GetSigned();
}
return ProtoType::Numeric(std::max(one.size, other.size), one.is_signed);
}
ProtoType InferProtoType(const FtraceEvent::Field& field) {
// Fixed length strings: "char foo[16]"
if (std::regex_match(field.type_and_name, std::regex(R"(char \w+\[\d+\])")))
return ProtoType::String();
// String pointers: "__data_loc char[] foo" (as in
// 'cpufreq_interactive_boost').
if (Contains(field.type_and_name, "char[] "))
return ProtoType::String();
if (Contains(field.type_and_name, "char * "))
return ProtoType::String();
// Variable length strings: "char* foo"
if (StartsWith(field.type_and_name, "char *"))
return ProtoType::String();
// Variable length strings: "char foo" + size: 0 (as in 'print').
if (StartsWith(field.type_and_name, "char ") && field.size == 0)
return ProtoType::String();
// ino_t, i_ino and dev_t are 32bit on some devices 64bit on others. For the
// protos we need to choose the largest possible size.
if (StartsWith(field.type_and_name, "ino_t ") ||
StartsWith(field.type_and_name, "i_ino ") ||
StartsWith(field.type_and_name, "dev_t ")) {
return ProtoType::Numeric(64, /* is_signed= */ false);
}
// Ints of various sizes:
if (field.size <= 4)
return ProtoType::Numeric(32, field.is_signed);
if (field.size <= 8)
return ProtoType::Numeric(64, field.is_signed);
return ProtoType::Invalid();
}
Proto::Proto(std::string evt_name, const google::protobuf::Descriptor& desc)
: name(desc.name()), event_name(evt_name) {
for (int i = 0; i < desc.field_count(); ++i) {
const google::protobuf::FieldDescriptor* field = desc.field(i);
PERFETTO_CHECK(field);
AddField(Field{ProtoType::FromDescriptor(field->type()), field->name(),
uint32_t(field->number())});
}
}
std::vector<const Proto::Field*> Proto::SortedFields() {
std::vector<const Proto::Field*> sorted_fields;
for (const auto& p : fields) {
sorted_fields.emplace_back(&p.second);
}
std::sort(sorted_fields.begin(), sorted_fields.end(),
[](const Proto::Field* a, const Proto::Field* b) {
return a->number < b->number;
});
return sorted_fields;
}
std::string Proto::ToString() {
std::string s;
s += "message " + name + " {\n";
for (const auto field : SortedFields()) {
s += " optional " + field->type.ToString() + " " + field->name + " = " +
std::to_string(field->number) + ";\n";
}
s += "}\n";
return s;
}
void Proto::MergeFrom(const Proto& other) {
// Always keep number from the left hand side.
PERFETTO_CHECK(name == other.name);
for (const auto& p : other.fields) {
auto it = fields.find(p.first);
if (it == fields.end()) {
Proto::Field field = p.second;
field.number = ++max_id;
AddField(std::move(field));
} else {
it->second.type = GetCommon(it->second.type, p.second.type);
}
}
}
void Proto::AddField(Proto::Field other) {
max_id = std::max(max_id, other.number);
fields.emplace(other.name, std::move(other));
}
} // namespace perfetto