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SQLite3PragmaGenerator.java
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235 lines (222 loc) · 8.75 KB
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package sqlancer.sqlite3.gen;
import java.sql.SQLException;
import java.util.function.Supplier;
import sqlancer.Randomly;
import sqlancer.common.query.ExpectedErrors;
import sqlancer.common.query.SQLQueryAdapter;
import sqlancer.sqlite3.SQLite3GlobalState;
public class SQLite3PragmaGenerator {
/**
* Not all pragmas are generated.
*
* <ul>
* <li>case_sensitive_like is not generated since the tool discovered that it has some conceptual issues, see
* https://www.sqlite.org/src/info/a340eef47b0cad5.</li>
* <li>legacy_alter_table is not generated since it does not work well with the ALTER command (see docs)</li>
* <li>journal_mode=off is generated, since it can corrupt the database, see
* https://www.sqlite.org/src/tktview?name=f4ec250930</li>
* <li>temp_store deletes all existing temporary tables</li>
* </ul>
*/
private enum Pragma {
APPLICATION_ID, //
AUTO_VACUUM, //
AUTOMATIC_INDEX, //
BUSY_TIMEOUT, //
CACHE_SIZE, //
CACHE_SPILL_ENABLED, //
CACHE_SPILL_SIZE, /* CASE_SENSITIVE_LIKE */ CELL_SIZE_CHECK, CHECKPOINT_FULLSYNC, DEFAULT_CACHE_SIZE,
DEFER_FOREIGN_KEY, /*
* ENCODING,
*/
FOREIGN_KEYS, IGNORE_CHECK_CONSTRAINTS, INCREMENTAL_VACUUM, INTEGRITY_CHECK, JOURNAL_MODE, JOURNAL_SIZE_LIMIT,
/*
* LEGACY_ALTER_TABLE
*/ OPTIMIZE, LEGACY_FORMAT, LOCKING_MODE, MMAP_SIZE, RECURSIVE_TRIGGERS, REVERSE_UNORDERED_SELECTS,
SECURE_DELETE, SHRINK_MEMORY, SOFT_HEAP_LIMIT, //
STATS, //
SHORT_COLUMN_NAMES,
/* TEMP_STORE, */ //
THREADS, //
WAL_AUTOCHECKPOINT, //
WAL_CHECKPOINT; //
// WRITEABLE_SCHEMA
}
private final StringBuilder sb = new StringBuilder();
private final ExpectedErrors errors = new ExpectedErrors();
public void createPragma(String pragmaName, Supplier<Object> supplier) {
boolean setSchema = Randomly.getBoolean();
boolean setValue = Randomly.getBoolean();
sb.append("PRAGMA ");
if (setSchema) {
sb.append(Randomly.fromOptions("main.", "temp."));
}
sb.append(pragmaName);
if (setValue) {
Object value = supplier.get();
if (value != null) {
sb.append(" = ");
sb.append(supplier.get());
}
}
}
public SQLQueryAdapter insert(SQLite3GlobalState globalState) {
Randomly r = globalState.getRandomly();
Pragma p = Randomly.fromOptions(Pragma.values());
switch (p) {
case APPLICATION_ID:
createPragma("application_id", () -> Randomly.getNonCachedInteger());
break;
case AUTO_VACUUM:
createPragma("auto_vacuum", () -> Randomly.fromOptions("NONE", "FULL", "INCREMENTAL"));
break;
case AUTOMATIC_INDEX:
createPragma("automatic_index", () -> getRandomTextBoolean());
break;
case BUSY_TIMEOUT:
createPragma("busy_timeout", () -> {
if (Randomly.getBoolean()) {
return 0;
} else {
return Math.max(10000, Randomly.getNonCachedInteger());
}
});
break;
case CACHE_SIZE:
createPragma("cache_size", () -> {
if (Randomly.getBoolean()) {
return 0;
} else {
return Randomly.getNonCachedInteger();
}
});
break;
case CACHE_SPILL_ENABLED:
createPragma("cache_spill", () -> getRandomTextBoolean());
break;
case CACHE_SPILL_SIZE:
createPragma("cache_spill", () -> Randomly.getNonCachedInteger());
break;
case CELL_SIZE_CHECK:
createPragma("cell_size_check", () -> getRandomTextBoolean());
break;
case CHECKPOINT_FULLSYNC:
createPragma("checkpoint_fullfsync", () -> getRandomTextBoolean());
break;
case DEFAULT_CACHE_SIZE:
createPragma("default_cache_size", () -> r.getInteger());
break;
case DEFER_FOREIGN_KEY:
createPragma("defer_foreign_keys", () -> getRandomTextBoolean());
break;
// TODO: [SQLITE_ERROR] SQL error or missing database (attached databases must
// use the same text encoding as main database)
// case ENCODING:
// sb.append("PRAGMA main.encoding = \"");
// String encoding = Randomly.fromOptions("UTF-8", "UTF-16", "UTF-16be", "UTF-16le");
// sb.append(encoding);
// sb.append("\";\n");
// sb.append("PRAGMA temp.encoding = \"");
// sb.append(encoding);
// sb.append("\"");
// break;
case FOREIGN_KEYS:
createPragma("foreign_keys", () -> getRandomTextBoolean());
break;
case IGNORE_CHECK_CONSTRAINTS:
createPragma("ignore_check_constraints", () -> getRandomTextBoolean());
break;
case INCREMENTAL_VACUUM:
if (Randomly.getBoolean()) {
createPragma("incremental_vacuum", () -> null);
} else {
sb.append(String.format("PRAGMA incremental_vacuum(%d)", r.getInteger()));
}
break;
case INTEGRITY_CHECK:
createPragma("integrity_check", () -> null);
break;
case JOURNAL_MODE:
// OFF is no longer generated, since it might corrupt the database upon failed
// index creation, see https://www.sqlite.org/src/tktview?name=f4ec250930.
createPragma("journal_mode", () -> Randomly.fromOptions("DELETE", "TRUNCATE", "PERSIST", "MEMORY", "WAL"));
errors.add("from within a transaction");
break;
case JOURNAL_SIZE_LIMIT:
createPragma("journal_size_limit", () -> {
if (Randomly.getBoolean()) {
return 0;
} else {
return Randomly.getNonCachedInteger();
}
});
break;
case LEGACY_FORMAT:
createPragma("legacy_file_format", () -> getRandomTextBoolean());
break;
case LOCKING_MODE:
createPragma("locking_mode", () -> Randomly.fromOptions("NORMAL", "EXCLUSIVE"));
break;
case MMAP_SIZE:
createPragma("mmap_size", () -> Randomly.getNonCachedInteger());
break;
case OPTIMIZE:
createPragma("optimize", () -> null);
break;
case RECURSIVE_TRIGGERS:
createPragma("recursive_triggers", () -> getRandomTextBoolean());
break;
case REVERSE_UNORDERED_SELECTS:
createPragma("reverse_unordered_selects", () -> getRandomTextBoolean());
break;
case SECURE_DELETE:
createPragma("secure_delete", () -> Randomly.fromOptions("true", "false", "FAST"));
break;
case SHORT_COLUMN_NAMES:
createPragma("short_column_names", () -> getRandomTextBoolean());
break;
case SHRINK_MEMORY:
createPragma("shrink_memory", () -> null);
break;
case SOFT_HEAP_LIMIT:
createPragma("soft_heap_limit", () -> {
if (Randomly.getBoolean()) {
return 0;
} else {
return r.getPositiveInteger();
}
});
break;
case STATS:
createPragma("stats", () -> null);
break;
// case TEMP_STORE:
// createPragma("temp_store", () -> Randomly.fromOptions("DEFAULT", "FILE", "MEMORY"));
// break;
case THREADS:
createPragma("threads", () -> Randomly.getNonCachedInteger());
break;
case WAL_AUTOCHECKPOINT:
createPragma("wal_autocheckpoint", () -> Randomly.getNonCachedInteger());
break;
case WAL_CHECKPOINT:
sb.append("PRAGMA wal_checkpoint(");
sb.append(Randomly.fromOptions("PASSIVE", "FULL", "RESTART", "TRUNCATE"));
sb.append(")");
errors.add("database table is locked");
break;
default:
throw new AssertionError(p);
}
sb.append(";");
String pragmaString = sb.toString();
errors.add("The database file is locked");
return new SQLQueryAdapter(pragmaString, errors);
}
public static SQLQueryAdapter insertPragma(SQLite3GlobalState globalState) throws SQLException {
return new SQLite3PragmaGenerator().insert(globalState);
}
private static String getRandomTextBoolean() {
return Randomly.fromOptions("true", "false");
}
}