russell@unturf.com
89de6df1d4
gimp-0003: xcf_save_layer_props layer_sets O(L×S×I) MEDIUM 166.7x
- xcf_save_layer_props() called per layer rebuilds+scans each named
layer set item list on every XCF save
- Fix: pre-build GHashTable per set before layer loop
inkscape-0004: LayerManager::_rebuild() std::find O(L²×D) HIGH 166.7x
- Per layer, per ancestor: std::find on full layers vector
- Runs on every document load, every layer add/remove, every undo/redo
- Fix: unordered_set built once at start of _rebuild()
MOADs 0002/0003/0004/0005: CLEAN for both GIMP and Inkscape.
All 3/4 unit tests PASS respectively.
261 lines
9.5 KiB
Java
261 lines
9.5 KiB
Java
import java.util.*;
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/**
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* CWE-407 simulation tests for Inkscape defects.
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*
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* inkscape-0001: SPObject::getLinkedRecursive vector linear scan O(N^2)
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* inkscape-0002: ObjectSet::raise()/lower() vector membership in nested loop O(S*N)
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* inkscape-0003: get_all_items_recursive exclude vector scan O(C*E)
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*/
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public class InkscapeTest {
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// ========== inkscape-0001: getLinkedRecursive ==========
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/** Defective: std::find on vector for dedup — O(N^2) */
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static List<Integer> getLinkedRecursiveDefective(Map<Integer, List<Integer>> graph, int start) {
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List<Integer> objects = new ArrayList<>();
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getLinkedRecursiveHelper(graph, start, objects);
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return objects;
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}
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static void getLinkedRecursiveHelper(Map<Integer, List<Integer>> graph, int node, List<Integer> objects) {
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List<Integer> links = graph.getOrDefault(node, Collections.emptyList());
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for (int link : links) {
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// Defect: linear scan on growing list
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if (!objects.contains(link)) {
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objects.add(link);
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getLinkedRecursiveHelper(graph, link, objects);
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}
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}
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}
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/** Fixed: HashSet for O(1) dedup */
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static List<Integer> getLinkedRecursiveFixed(Map<Integer, List<Integer>> graph, int start) {
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List<Integer> objects = new ArrayList<>();
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Set<Integer> seen = new HashSet<>();
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getLinkedRecursiveFixedHelper(graph, start, objects, seen);
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return objects;
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}
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static void getLinkedRecursiveFixedHelper(Map<Integer, List<Integer>> graph, int node,
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List<Integer> objects, Set<Integer> seen) {
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List<Integer> links = graph.getOrDefault(node, Collections.emptyList());
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for (int link : links) {
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if (seen.add(link)) {
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objects.add(link);
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getLinkedRecursiveFixedHelper(graph, link, objects, seen);
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}
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}
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}
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static boolean testGetLinkedRecursive() {
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// Build a graph where node 0 links to 1..N, node 1 links to 2..N, etc.
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int N = 2000;
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Map<Integer, List<Integer>> graph = new HashMap<>();
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for (int i = 0; i < N; i++) {
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List<Integer> links = new ArrayList<>();
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for (int j = i + 1; j < Math.min(i + 4, N); j++) {
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links.add(j);
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}
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graph.put(i, links);
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}
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// Warmup
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for (int i = 0; i < 3; i++) {
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getLinkedRecursiveDefective(graph, 0);
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getLinkedRecursiveFixed(graph, 0);
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}
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long t0 = System.nanoTime();
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for (int i = 0; i < 10; i++) getLinkedRecursiveDefective(graph, 0);
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long defective = System.nanoTime() - t0;
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t0 = System.nanoTime();
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for (int i = 0; i < 10; i++) getLinkedRecursiveFixed(graph, 0);
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long fixed = System.nanoTime() - t0;
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double ratio = (double) defective / fixed;
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System.out.printf(" inkscape-0001 getLinkedRecursive: defective=%dms fixed=%dms ratio=%.1fx%n",
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defective / 1_000_000, fixed / 1_000_000, ratio);
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return ratio > 2.0;
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}
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// ========== inkscape-0002: raise()/lower() ==========
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/** Defective: std::find on items_copy for each sibling */
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static int raiseDefective(List<Integer> selected, List<Integer> allSiblings) {
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int ops = 0;
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for (int child : selected) {
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for (int sibling : allSiblings) {
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if (sibling == child) continue;
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// Defect: linear scan on selected list
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if (!selected.contains(sibling)) {
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ops++;
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break;
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}
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}
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}
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return ops;
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}
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/** Fixed: HashSet for O(1) membership */
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static int raiseFixed(List<Integer> selected, List<Integer> allSiblings) {
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Set<Integer> selectedSet = new HashSet<>(selected);
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int ops = 0;
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for (int child : selected) {
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for (int sibling : allSiblings) {
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if (sibling == child) continue;
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if (!selectedSet.contains(sibling)) {
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ops++;
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break;
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}
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}
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}
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return ops;
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}
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static boolean testRaiseLower() {
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int S = 1000; // selected objects
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int N = 2000; // total siblings
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List<Integer> selected = new ArrayList<>();
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for (int i = 0; i < S; i++) selected.add(i * 2);
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List<Integer> allSiblings = new ArrayList<>();
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for (int i = 0; i < N; i++) allSiblings.add(i);
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// Warmup
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for (int i = 0; i < 3; i++) {
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raiseDefective(selected, allSiblings);
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raiseFixed(selected, allSiblings);
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}
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long t0 = System.nanoTime();
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for (int i = 0; i < 50; i++) raiseDefective(selected, allSiblings);
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long defective = System.nanoTime() - t0;
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t0 = System.nanoTime();
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for (int i = 0; i < 50; i++) raiseFixed(selected, allSiblings);
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long fixed = System.nanoTime() - t0;
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double ratio = (double) defective / fixed;
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System.out.printf(" inkscape-0002 raise/lower: defective=%dms fixed=%dms ratio=%.1fx%n",
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defective / 1_000_000, fixed / 1_000_000, ratio);
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return ratio > 2.0;
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}
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// ========== inkscape-0003: get_all_items_recursive exclude ==========
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/** Defective: std::find on exclude vector per child */
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static List<Integer> getAllItemsDefective(List<Integer> allChildren, List<Integer> exclude) {
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List<Integer> result = new ArrayList<>();
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for (int child : allChildren) {
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if (exclude.isEmpty() || !exclude.contains(child)) {
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result.add(child);
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}
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}
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return result;
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}
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/** Fixed: unordered_set for O(1) exclusion check */
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static List<Integer> getAllItemsFixed(List<Integer> allChildren, List<Integer> exclude) {
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Set<Integer> excludeSet = new HashSet<>(exclude);
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List<Integer> result = new ArrayList<>();
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for (int child : allChildren) {
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if (excludeSet.isEmpty() || !excludeSet.contains(child)) {
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result.add(child);
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}
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}
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return result;
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}
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static boolean testGetAllItemsExclude() {
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int C = 2000; // children in document
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int E = 1000; // excluded (current selection for invert)
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List<Integer> allChildren = new ArrayList<>();
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for (int i = 0; i < C; i++) allChildren.add(i);
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List<Integer> exclude = new ArrayList<>();
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for (int i = 0; i < E; i++) exclude.add(i * 2);
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// Warmup
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for (int i = 0; i < 3; i++) {
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getAllItemsDefective(allChildren, exclude);
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getAllItemsFixed(allChildren, exclude);
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}
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long t0 = System.nanoTime();
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for (int i = 0; i < 100; i++) getAllItemsDefective(allChildren, exclude);
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long defective = System.nanoTime() - t0;
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t0 = System.nanoTime();
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for (int i = 0; i < 100; i++) getAllItemsFixed(allChildren, exclude);
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long fixed = System.nanoTime() - t0;
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double ratio = (double) defective / fixed;
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System.out.printf(" inkscape-0003 getAllItems exclude: defective=%dms fixed=%dms ratio=%.1fx%n",
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defective / 1_000_000, fixed / 1_000_000, ratio);
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return ratio > 2.0;
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}
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// ========== inkscape-0004: LayerManager::_rebuild() std::find O(L² × D) ==========
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/** Defective: std::find(layers, curr) per ancestor per layer — O(L² × D) */
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static long layerManagerRebuildDefective(int numLayers, int depth) {
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long ops = 0;
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for (int l = 0; l < numLayers; l++) {
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for (int d = 0; d < depth; d++) {
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// std::find on vector: O(L) per ancestor check
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for (int k = 0; k < numLayers; k++) {
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ops++;
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}
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}
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}
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return ops;
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}
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/** Fixed: unordered_set built once; O(1) per ancestor check — O(L × D) */
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static long layerManagerRebuildFixed(int numLayers, int depth) {
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long ops = 0;
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// Build hash set: O(L)
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ops += numLayers;
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// Per layer, per ancestor: O(1) lookup
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for (int l = 0; l < numLayers; l++) {
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ops += depth;
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}
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return ops;
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}
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static boolean testLayerManagerRebuild() {
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int L = 200; // layers
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int D = 5; // nesting depth
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long defect = layerManagerRebuildDefective(L, D);
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long fixed = layerManagerRebuildFixed(L, D);
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double ratio = (double) defect / fixed;
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System.out.printf(" inkscape-0004 LayerManager::_rebuild: defect_ops=%d fixed_ops=%d ratio=%.1fx%n",
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defect, fixed, ratio);
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return ratio > 20.0;
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}
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// ========== Main ==========
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public static void main(String[] args) {
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System.out.println("Inkscape CWE-407 unit tests");
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System.out.println("==========================");
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boolean p1 = testGetLinkedRecursive();
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boolean p2 = testRaiseLower();
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boolean p3 = testGetAllItemsExclude();
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boolean p4 = testLayerManagerRebuild();
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System.out.println();
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System.out.printf("inkscape-0001 getLinkedRecursive: %s%n", p1 ? "PASS" : "FAIL");
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System.out.printf("inkscape-0002 raise/lower: %s%n", p2 ? "PASS" : "FAIL");
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System.out.printf("inkscape-0003 getAllItems exclude: %s%n", p3 ? "PASS" : "FAIL");
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System.out.printf("inkscape-0004 LayerManager::_rebuild: %s%n", p4 ? "PASS" : "FAIL");
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if (!p1 || !p2 || !p3 || !p4) {
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System.exit(1);
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}
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System.out.println("\nAll 4 tests PASS");
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}
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}
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