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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 "src/trace_processor/process_table.h"
#include "perfetto/base/logging.h"
#include "src/trace_processor/sqlite/query_constraints.h"
#include "src/trace_processor/sqlite/sqlite_utils.h"
namespace perfetto {
namespace trace_processor {
namespace {
using namespace sqlite_utils;
} // namespace
ProcessTable::ProcessTable(sqlite3*, const TraceStorage* storage)
: storage_(storage) {}
void ProcessTable::RegisterTable(sqlite3* db, const TraceStorage* storage) {
SqliteTable::Register<ProcessTable>(db, storage, "process");
}
util::Status ProcessTable::Init(int, const char* const*, Schema* schema) {
*schema = Schema(
{
SqliteTable::Column(Column::kUpid, "upid", SqlValue::Type::kLong),
SqliteTable::Column(Column::kName, "name", SqlValue::Type::kString),
SqliteTable::Column(Column::kPid, "pid", SqlValue::Type::kLong),
SqliteTable::Column(Column::kStartTs, "start_ts",
SqlValue::Type::kLong),
SqliteTable::Column(Column::kEndTs, "end_ts", SqlValue::Type::kLong),
SqliteTable::Column(Column::kParentUpid, "parent_upid",
SqlValue::Type::kLong),
},
{Column::kUpid});
return util::OkStatus();
}
std::unique_ptr<SqliteTable::Cursor> ProcessTable::CreateCursor() {
return std::unique_ptr<SqliteTable::Cursor>(new Cursor(this));
}
int ProcessTable::BestIndex(const QueryConstraints& qc, BestIndexInfo* info) {
// If the query has a constraint on the |upid| field, return a reduced cost
// because we can do that filter efficiently.
const auto& cs = qc.constraints();
auto fn = [](const QueryConstraints::Constraint& c) {
return c.iColumn == Column::kUpid && sqlite_utils::IsOpEq(c.op);
};
info->estimated_cost = std::find_if(cs.begin(), cs.end(), fn) != cs.end()
? 1
: static_cast<uint32_t>(storage_->process_count());
return SQLITE_OK;
}
ProcessTable::Cursor::Cursor(ProcessTable* table)
: SqliteTable::Cursor(table), storage_(table->storage_) {}
int ProcessTable::Cursor::Filter(const QueryConstraints& qc,
sqlite3_value** argv) {
min_ = 0;
max_ = static_cast<uint32_t>(storage_->process_count());
desc_ = false;
for (size_t j = 0; j < qc.constraints().size(); j++) {
const auto& cs = qc.constraints()[j];
if (cs.iColumn == Column::kUpid) {
auto constraint_upid = static_cast<UniquePid>(sqlite3_value_int(argv[j]));
// Set the range of upids that we are interested in, based on the
// constraints in the query. Everything between min and max (exclusive)
// will be returned.
if (IsOpEq(cs.op)) {
min_ = constraint_upid;
max_ = constraint_upid + 1;
} else if (IsOpGe(cs.op) || IsOpGt(cs.op)) {
min_ = IsOpGt(cs.op) ? constraint_upid + 1 : constraint_upid;
} else if (IsOpLe(cs.op) || IsOpLt(cs.op)) {
max_ = IsOpLt(cs.op) ? constraint_upid : constraint_upid + 1;
}
}
}
for (const auto& ob : qc.order_by()) {
if (ob.iColumn == Column::kUpid) {
desc_ = ob.desc;
}
}
index_ = 0;
return SQLITE_OK;
}
int ProcessTable::Cursor::Column(sqlite3_context* context, int N) {
uint32_t current = desc_ ? max_ - index_ - 1 : min_ + index_;
const auto& process = storage_->GetProcess(current);
switch (N) {
case Column::kUpid: {
sqlite3_result_int64(context, current);
break;
}
case Column::kName: {
const auto& name = storage_->GetString(process.name_id);
sqlite3_result_text(context, name.c_str(), -1, kSqliteStatic);
break;
}
case Column::kPid: {
sqlite3_result_int64(context, process.pid);
break;
}
case Column::kStartTs: {
if (process.start_ns != 0) {
sqlite3_result_int64(context, process.start_ns);
} else {
sqlite3_result_null(context);
}
break;
}
case Column::kEndTs: {
if (process.end_ns != 0) {
sqlite3_result_int64(context, process.end_ns);
} else {
sqlite3_result_null(context);
}
break;
}
case Column::kParentUpid: {
if (process.parent_upid.has_value()) {
sqlite3_result_int64(context, process.parent_upid.value());
} else {
sqlite3_result_null(context);
}
break;
}
default:
PERFETTO_FATAL("Unknown column %d", N);
break;
}
return SQLITE_OK;
}
int ProcessTable::Cursor::Next() {
++index_;
return SQLITE_OK;
}
int ProcessTable::Cursor::Eof() {
return index_ >= (max_ - min_);
}
} // namespace trace_processor
} // namespace perfetto
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