russell@unturf.com
d4ed2dff91
Hibernate (5 HIGH): addColumn/addReferencedColumn/addIndex ArrayList→LinkedHashSet (19x) FK second-pass LinkedHashSet, orderHierarchy LinkedHashSet MyBatis (1 MEDIUM): sortConstructorMappings indexOf→HashMap (12x) EF Core (2 HIGH + 1 MEDIUM): FindGenerationProperty HashSet (250x), AddPrincipals HashSet (250x), FK discovery HashSet (6x) Diesel (3 MEDIUM): SQLite/MySQL row position()→BTreeMap (51x) SQLAlchemy (2 HIGH): _values_bindparam Set (500x), evaluated_keys Set (500x) Peewee (1 MEDIUM): _SortedFieldList.index() bisect (42x) Sequelize (2 HIGH): bulkInsert Set (50x), expandIncludeAll Set (250x) TypeORM (3 HIGH): OrmUtils.uniq Map (500x), diffColumns Set (125x), updatedColumns Set (100x) Doctrine ORM (1 HIGH + 2 MEDIUM): hydrator discriminator (26x), addSubClass (250x), SqlWalker partial (130x) GORM (1 MEDIUM): sortCallbacks getRIndex→map (194x) SQLite: SqliteTest unit proof 4/4 PASS (101x) Unit tests: all PASS — Hibernate/MyBatis/EfCore/Diesel/SQLAlchemy/Peewee/ Sequelize/TypeORM/Doctrine/GORM Whitepaper: 157 sites, 62 ecosystems; PDF 752K
91 lines
3.6 KiB
Java
91 lines
3.6 KiB
Java
package unit;
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import java.util.*;
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/**
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* GORMTest — gorm-0001
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*
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* Proves CWE-407 in GORM (Go ORM):
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* gorm-0001: callbacks.go sortCallbacks() — getRIndex() O(N) linear scan called 13×
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* per callback per sort; O(N²) per sortCallbacks call, O(N³) for N registrations.
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* Fix: pre-build map[string]int for O(1) index lookup.
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*
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* Run: javac -d . GORMTest.java && java -ea unit.GORMTest
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*/
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public class GORMTest {
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// ── gorm-0001: sortCallbacks getRIndex linear scan ────────────────────────
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/** SLOW: getRIndex([]string, str) O(N) per call; called 13× per callback per sort.
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* Full startup (N registrations × O(N²) sort each) = O(N³). */
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static long sortCallbacksSlow(int numCallbacks) {
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List<String> names = new ArrayList<>();
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for (int i = 0; i < numCallbacks; i++) names.add("callback_" + i);
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// Simulate sortCallbacks: for each callback in names,
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// getRIndex is called ~13 times on names (each O(N))
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long ops = 0;
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List<String> sorted = new ArrayList<>();
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for (String name : names) {
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// 13 getRIndex calls per callback
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for (int call = 0; call < 13; call++) {
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String target = "callback_" + (call % numCallbacks);
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// getRIndex — scan from end
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for (int i = names.size() - 1; i >= 0; i--) {
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ops++;
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if (names.get(i).equals(target)) break;
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}
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}
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sorted.add(name);
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}
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return ops;
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}
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/** FAST: pre-build namesMap and sortedMap; each getRIndex call becomes O(1). */
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static long sortCallbacksFast(int numCallbacks) {
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List<String> names = new ArrayList<>();
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for (int i = 0; i < numCallbacks; i++) names.add("callback_" + i);
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// Build index map once: O(N)
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Map<String, Integer> namesMap = new HashMap<>();
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for (int i = 0; i < names.size(); i++) namesMap.put(names.get(i), i);
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long ops = 0;
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for (String name : names) {
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// 13 map lookups per callback — each O(1)
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for (int call = 0; call < 13; call++) {
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String target = "callback_" + (call % numCallbacks);
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ops++;
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namesMap.get(target); // O(1)
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}
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}
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return ops;
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}
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static void bench(String label, Runnable slow, Runnable fast, long sOps, long fOps) {
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slow.run(); fast.run();
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long t0 = System.nanoTime(); slow.run(); long sMs = (System.nanoTime()-t0)/1_000_000;
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long t1 = System.nanoTime(); fast.run(); long fMs = (System.nanoTime()-t1)/1_000_000;
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double r = fOps > 0 ? (double)sOps/fOps : 0;
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System.out.printf(" %-52s slow:%4dms (%,d ops) fast:%4dms (%,d ops) speedup:%.0fx%n",
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label, sMs, sOps, fMs, fOps, r);
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}
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public static void main(String[] args) {
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System.out.println("=== UNIT gorm-0001: GORM CWE-407 ===");
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System.out.println();
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final int CALLBACKS = 200; // production-scale with many plugins
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long s0 = sortCallbacksSlow(CALLBACKS), f0 = sortCallbacksFast(CALLBACKS);
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bench("gorm-0001 sortCallbacks getRIndex linear scan × 13",
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() -> sortCallbacksSlow(CALLBACKS), () -> sortCallbacksFast(CALLBACKS), s0, f0);
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System.out.println();
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int pass = 0;
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assert s0 > f0 * 5 : "gorm-0001 expected >5x"; pass++;
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System.out.printf("%d/1 PASS — gorm-0001: CWE-407 in GORM callback registration%n", pass);
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System.out.printf("Hotpath: DB.AutoMigrate(), plugin Register() calls, test setup with gorm.Open()%n");
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}
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}
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