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/*
* 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/ftrace_proto_gen.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"
namespace perfetto {
namespace {
const char kCopyrightHeader[] = R"(/*
* Copyright (C) 2017 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.
*/
)";
} // namespace
using base::Contains;
using base::StartsWith;
std::string EventNameToProtoFieldName(const std::string& group,
const std::string& name) {
std::string event_name = (name == "0") ? "zero" : name;
// These groups have events where the name alone conflicts with an existing
// proto:
if (group == "sde" || group == "g2d" || group == "dpu") {
event_name = group + "_" + event_name;
}
return event_name;
}
std::string EventNameToProtoName(const std::string& group,
const std::string& name) {
return ToCamelCase(EventNameToProtoFieldName(group, name)) + "FtraceEvent";
}
std::vector<FtraceEventName> ReadAllowList(const std::string& filename) {
std::string line;
std::vector<FtraceEventName> lines;
std::ifstream fin(filename, std::ios::in);
if (!fin) {
fprintf(stderr, "failed to open event list %s\n", filename.c_str());
return lines;
}
while (std::getline(fin, line)) {
if (!StartsWith(line, "#"))
lines.emplace_back(FtraceEventName(line));
}
return lines;
}
bool GenerateProto(const std::string& group,
const FtraceEvent& format,
Proto* proto_out) {
proto_out->name = EventNameToProtoName(group, format.name);
proto_out->event_name = format.name;
std::set<std::string> seen;
// TODO(hjd): We should be cleverer about id assignment.
uint32_t i = 1;
for (const FtraceEvent::Field& field : format.fields) {
std::string name = GetNameFromTypeAndName(field.type_and_name);
// TODO(hjd): Handle dup names.
// sa_handler is problematic because glib headers redefine it at the
// preprocessor level. It's impossible to have a variable or a function
// called sa_handler. On the good side, we realistically don't care about
// this field, it's just easier to skip it.
if (name == "" || seen.count(name) || name == "sa_handler" ||
name == "errno")
continue;
seen.insert(name);
ProtoType type = InferProtoType(field);
// Check we managed to infer a type.
if (type.type == ProtoType::INVALID)
continue;
Proto::Field protofield{std::move(type), name, i};
proto_out->AddField(std::move(protofield));
i++;
}
return true;
}
void GenerateFtraceEventProto(const std::vector<FtraceEventName>& raw_eventlist,
const std::set<std::string>& groups,
std::ostream* fout) {
*fout << kCopyrightHeader;
*fout << "// Autogenerated by:\n";
*fout << std::string("// ") + __FILE__ + "\n";
*fout << "// Do not edit.\n\n";
*fout << R"(syntax = "proto2";)"
<< "\n\n";
for (const std::string& group : groups) {
*fout << R"(import "protos/perfetto/trace/ftrace/)" << group
<< R"(.proto";)"
<< "\n";
}
*fout << "import \"protos/perfetto/trace/ftrace/generic.proto\";\n";
*fout << "\n";
*fout << "package perfetto.protos;\n\n";
*fout << R"(message FtraceEvent {
// Nanoseconds since an epoch.
// Epoch is configurable by writing into trace_clock.
// By default this timestamp is CPU local.
// TODO: Figure out a story for reconciling the various clocks.
optional uint64 timestamp = 1;
// Kernel pid (do not confuse with userspace pid aka tgid)
optional uint32 pid = 2;
oneof event {
)";
int i = 3;
for (const FtraceEventName& event : raw_eventlist) {
if (!event.valid()) {
*fout << " // removed field with id " << i << ";\n";
++i;
continue;
}
std::string field_name =
EventNameToProtoFieldName(event.group(), event.name());
std::string type_name = EventNameToProtoName(event.group(), event.name());
// " " (indent) + TypeName + " " + field_name + " = " + 123 + ";"
if (4 + type_name.size() + 1 + field_name.size() + 3 + 3 + 1 <= 80) {
// Everything fits in one line:
*fout << " " << type_name << " " << field_name << " = " << i << ";\n";
} else if (4 + type_name.size() + 1 + field_name.size() + 2 <= 80) {
// Everything fits except the field id:
*fout << " " << type_name << " " << field_name << " =\n " << i
<< ";\n";
} else {
// Nothing fits:
*fout << " " << type_name << "\n " << field_name << " = " << i
<< ";\n";
}
++i;
// We cannot depend on the proto file to get this number because
// it would cause a dependency cycle between this generator and the
// generated code.
if (i == 327) {
*fout << " GenericFtraceEvent generic = " << i << ";\n";
++i;
}
}
*fout << " }\n";
*fout << "}\n";
}
// Generates section of event_info.cc for a single event.
std::string SingleEventInfo(perfetto::Proto proto,
const std::string& group,
const uint32_t proto_field_id) {
std::string s = "{";
s += "\"" + proto.event_name + "\", ";
s += "\"" + group + "\", ";
// Vector of fields.
s += "{ ";
for (const auto& field : proto.SortedFields()) {
// Ignore the "ip" field from print events. This field has not proven
// particularly useful and takes up a large amount of space (30% of total
// PrintFtraceEvent size and up to 12% of the entire trace in some
// configurations)
if (group == "ftrace" && proto.event_name == "print" && field->name == "ip")
continue;
s += "{";
s += "kUnsetOffset, ";
s += "kUnsetSize, ";
s += "FtraceFieldType::kInvalidFtraceFieldType, ";
s += "\"" + field->name + "\", ";
s += std::to_string(field->number) + ", ";
s += "ProtoSchemaType::k" + ToCamelCase(field->type.ToString()) + ", ";
s += "TranslationStrategy::kInvalidTranslationStrategy";
s += "}, ";
}
s += "}, ";
s += "kUnsetFtraceId, ";
s += std::to_string(proto_field_id) + ", ";
s += "kUnsetSize";
s += "}";
return s;
}
// This will generate the event_info.cc file for the listed protos.
void GenerateEventInfo(const std::vector<std::string>& events_info,
std::ostream* fout) {
std::string s = kCopyrightHeader;
s += "// Autogenerated by:\n";
s += std::string("// ") + __FILE__ + "\n";
s += "// Do not edit.\n";
s += R"(
#include "perfetto/protozero/proto_utils.h"
#include "src/traced/probes/ftrace/event_info.h"
namespace perfetto {
using protozero::proto_utils::ProtoSchemaType;
std::vector<Event> GetStaticEventInfo() {
static constexpr uint16_t kUnsetOffset = 0;
static constexpr uint16_t kUnsetSize = 0;
static constexpr uint16_t kUnsetFtraceId = 0;
return
)";
s += " {";
for (const auto& event : events_info) {
s += event;
s += ",\n";
}
s += "};";
s += R"(
}
} // namespace perfetto
)";
*fout << s;
}
std::string ProtoHeader() {
std::string s = "// Autogenerated by:\n";
s += std::string("// ") + __FILE__ + "\n";
s += "// Do not edit.\n";
s += R"(
syntax = "proto2";
package perfetto.protos;
)";
return s;
}
} // namespace perfetto