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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.
*/
#include "src/trace_processor/sqlite/sqlite_engine.h"
#include <utility>
#include "perfetto/base/status.h"
#include "src/trace_processor/sqlite/db_sqlite_table.h"
#include "src/trace_processor/sqlite/query_cache.h"
#include "src/trace_processor/sqlite/sqlite_table.h"
// In Android and Chromium tree builds, we don't have the percentile module.
// Just don't include it.
#if PERFETTO_BUILDFLAG(PERFETTO_TP_PERCENTILE)
// defined in sqlite_src/ext/misc/percentile.c
extern "C" int sqlite3_percentile_init(sqlite3* db,
char** error,
const sqlite3_api_routines* api);
#endif // PERFETTO_BUILDFLAG(PERFETTO_TP_PERCENTILE)
namespace perfetto {
namespace trace_processor {
namespace {
void EnsureSqliteInitialized() {
// sqlite3_initialize isn't actually thread-safe despite being documented
// as such; we need to make sure multiple TraceProcessorImpl instances don't
// call it concurrently and only gets called once per process, instead.
static bool init_once = [] { return sqlite3_initialize() == SQLITE_OK; }();
PERFETTO_CHECK(init_once);
}
void InitializeSqlite(sqlite3* db) {
char* error = nullptr;
sqlite3_exec(db, "PRAGMA temp_store=2", nullptr, nullptr, &error);
if (error) {
PERFETTO_FATAL("Error setting pragma temp_store: %s", error);
}
// In Android tree builds, we don't have the percentile module.
// Just don't include it.
#if PERFETTO_BUILDFLAG(PERFETTO_TP_PERCENTILE)
sqlite3_percentile_init(db, &error, nullptr);
if (error) {
PERFETTO_ELOG("Error initializing: %s", error);
sqlite3_free(error);
}
#endif
}
} // namespace
SqliteEngine::SqliteEngine() : query_cache_(new QueryCache()) {
sqlite3* db = nullptr;
EnsureSqliteInitialized();
PERFETTO_CHECK(sqlite3_open(":memory:", &db) == SQLITE_OK);
InitializeSqlite(db);
db_.reset(std::move(db));
}
SqliteEngine::~SqliteEngine() {
// It is important to unregister any functions that have been registered with
// the database before destroying it. This is because functions can hold onto
// prepared statements, which must be finalized before database destruction.
for (auto it = fn_ctx_.GetIterator(); it; ++it) {
int ret = sqlite3_create_function_v2(db_.get(), it.key().first.c_str(),
it.key().second, SQLITE_UTF8, nullptr,
nullptr, nullptr, nullptr, nullptr);
PERFETTO_CHECK(ret == 0);
}
fn_ctx_.Clear();
}
void SqliteEngine::RegisterTable(const Table& table,
const std::string& table_name) {
DbSqliteTable::Context context{query_cache_.get(),
DbSqliteTable::TableComputation::kStatic,
&table, nullptr};
RegisterVirtualTableModule<DbSqliteTable>(table_name, std::move(context),
SqliteTable::kEponymousOnly, false);
// Register virtual tables into an internal 'perfetto_tables' table.
// This is used for iterating through all the tables during a database
// export.
char* insert_sql = sqlite3_mprintf(
"INSERT INTO perfetto_tables(name) VALUES('%q')", table_name.c_str());
char* error = nullptr;
sqlite3_exec(db_.get(), insert_sql, nullptr, nullptr, &error);
sqlite3_free(insert_sql);
if (error) {
PERFETTO_ELOG("Error adding table to perfetto_tables: %s", error);
sqlite3_free(error);
}
}
void SqliteEngine::RegisterTableFunction(std::unique_ptr<TableFunction> fn) {
std::string table_name = fn->TableName();
DbSqliteTable::Context context{query_cache_.get(),
DbSqliteTable::TableComputation::kDynamic,
nullptr, std::move(fn)};
RegisterVirtualTableModule<DbSqliteTable>(table_name, std::move(context),
SqliteTable::kEponymousOnly, false);
}
base::Status SqliteEngine::DeclareVirtualTable(const std::string& create_stmt) {
int res = sqlite3_declare_vtab(db_.get(), create_stmt.c_str());
if (res != SQLITE_OK) {
return base::ErrStatus("Declare vtab failed: %s",
sqlite3_errmsg(db_.get()));
}
return base::OkStatus();
}
base::Status SqliteEngine::SaveSqliteTable(const std::string& table_name,
std::unique_ptr<SqliteTable> table) {
auto res = saved_tables_.Insert(table_name, {});
if (!res.second) {
return base::ErrStatus("Table with name %s already is saved",
table_name.c_str());
}
*res.first = std::move(table);
return base::OkStatus();
}
base::StatusOr<std::unique_ptr<SqliteTable>> SqliteEngine::RestoreSqliteTable(
const std::string& table_name) {
auto* res = saved_tables_.Find(table_name);
if (!res) {
return base::ErrStatus("Table with name %s does not exist in saved state",
table_name.c_str());
}
return std::move(*res);
}
void* SqliteEngine::GetFunctionContext(const std::string& name, int argc) {
auto* res = fn_ctx_.Find(std::make_pair(name, argc));
return res ? *res : nullptr;
}
} // namespace trace_processor
} // namespace perfetto
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