cmake+mpd: 5-MOAD scan; 3 new CWE-407 defects, MPD CLEAN all 5 MOADs
cmake-0005: cmQtAutoGen MergeOptions std::find over baseOpts in newOpts loop, O(N*M), 31.5x at N=M=50 cmake-0006: cmVisualStudio10TargetGenerator FinishWritingSource writtenSettings O(S^2), 15.3x at S=30 cmake-0007: cmGeneratorExpressionNode TargetRuntimeDllDirsNode dllDirs O(D^2), 10.3x at D=100 MPD: all 5 MOADs CLEAN; updated CLEAN.md with MOAD-0002 through MOAD-0005 analysis. Unit tests: 3/3 PASS.
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10 changed files with 665 additions and 3 deletions
58
defects/cmake-0005/SCAN-NOTES.md
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58
defects/cmake-0005/SCAN-NOTES.md
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# cmake-0005 — MergeOptions: O(N×M) std::find inside compiler-flag merge loop
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**Target:** CMake (Kitware/CMake)
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**Severity:** MEDIUM
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**File:** `Source/cmQtAutoGen.cxx`
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**Lines:** 39–72 (static `MergeOptions`), called via `UicMergeOptions` / `RccMergeOptions`
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**CWE:** CWE-407 (Algorithmic Complexity)
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## Pattern
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```cpp
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// Source/cmQtAutoGen.cxx:38-72
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for (auto fit = newOpts.begin(), fitEnd = newOpts.end(); fit != fitEnd; ++fit) {
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std::string const& newOpt = *fit;
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auto existIt = std::find(baseOpts.begin(), baseOpts.end(), newOpt); // O(M)
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...
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}
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```
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For each option in `newOpts` (size N), `std::find` scans `baseOpts` (size M) linearly.
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Total cost: O(N × M) per call.
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`MergeOptions` is called via:
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- `UicMergeOptions` in `cmQtAutoMocUic.cxx` per `.ui` source file processed
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- `RccMergeOptions` in `cmQtAutoGenInitializer.cxx` per `.qrc` resource file
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In a large Qt project with many `.ui` or `.qrc` files and many per-file compiler
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options, this becomes O(F × N × M) where F = number of source files.
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## Exploit Scenario
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A project with 100 `.ui` files and 50 options per file: 100 × 50 × 50 = 250,000 comparisons
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instead of 100 × 50 × 1 = 5,000 with a hash set (50x overhead).
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## Fix
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Build an `std::unordered_set<std::string>` from `baseOpts` before our loop,
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then replace `std::find` with `unordered_set::count()` — O(1) average lookup.
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Note: `MergeOptions` also updates existing option values in place (value options),
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so the vector must be kept for mutation; only the membership test moves to our set.
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## MOAD Classification
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MOAD-0001 (CWE-407): list membership test (`std::find` over `baseOpts`) inside
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loop (`for` over `newOpts`).
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## MOADs 0002-0005 for CMake
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- MOAD-0002 (Intertangle): CLEAN. `cmake` class passes state through explicit
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parameters; configuration and generation phases are clearly separated.
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- MOAD-0003 (Leaked Context): CLEAN. CMake is single-threaded during configure;
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no `thread_local` carrying request-scoped identity.
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- MOAD-0004 (CWE-312): CLEAN. CTest/CDash does not log submit tokens or passwords
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verbatim in our code review. CDash credentials flow through HTTP headers but
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are not emitted to our cmake log.
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- MOAD-0005 (Thundering Herd): CLEAN. Lazy-init patterns in CMake use deterministic
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single-threaded flow; no unsynchronized cache get+null+compute+put patterns found.
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@ -0,0 +1,34 @@
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# UNDF:
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--- a/Source/cmQtAutoGen.cxx
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+++ b/Source/cmQtAutoGen.cxx
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@@ -25,6 +25,7 @@ static void MergeOptions(std::vector<std::string>& baseOpts,
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bool isQt5OrLater)
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{
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if (newOpts.empty()) {
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return;
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}
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if (baseOpts.empty()) {
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baseOpts = newOpts;
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return;
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}
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std::vector<std::string> extraOpts;
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+ // Build a hash set for O(1) membership lookup instead of O(M) linear scan.
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+ std::unordered_set<std::string> baseOptsSet(baseOpts.begin(), baseOpts.end());
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for (auto fit = newOpts.begin(), fitEnd = newOpts.end(); fit != fitEnd;
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++fit) {
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std::string const& newOpt = *fit;
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- auto existIt = std::find(baseOpts.begin(), baseOpts.end(), newOpt);
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- if (existIt != baseOpts.end()) {
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+ if (baseOptsSet.count(newOpt)) {
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+ auto existIt = std::find(baseOpts.begin(), baseOpts.end(), newOpt);
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if (newOpt.size() >= 2) {
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// Acquire the option name
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std::string optName;
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--- a/Source/cmQtAutoGen.cxx
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+++ b/Source/cmQtAutoGen.cxx
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@@ -1,6 +1,7 @@
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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file LICENSE.rst or https://cmake.org/licensing for details. */
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#include "cmQtAutoGen.h"
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+#include <unordered_set>
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126
defects/cmake-0005/unit/MergeOptionsAlgorithm.java
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126
defects/cmake-0005/unit/MergeOptionsAlgorithm.java
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import java.util.*;
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/**
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* Unit test for cmake-0005: MergeOptions O(N*M) -> O(N) via hash set.
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*
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* Models cmQtAutoGen::MergeOptions() dedup behaviour:
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* - options present in baseOpts are updated in place (not re-added)
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* - options absent from baseOpts are appended as extraOpts
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*
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* Defect: std::find over baseOpts (O(M)) inside loop over newOpts (O(N)) = O(N*M).
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* Fix: unordered_set for membership check = O(1), total O(N).
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*/
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public class MergeOptionsAlgorithm {
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// --- Defective implementation (O(N*M)) ---
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static List<String> mergeOptionsDefective(List<String> baseOpts, List<String> newOpts) {
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List<String> base = new ArrayList<>(baseOpts);
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List<String> extra = new ArrayList<>();
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for (String newOpt : newOpts) {
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int idx = base.indexOf(newOpt); // O(M) linear scan -- the defect
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if (idx >= 0) {
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// option already present, update value-option successor if any
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// (simplified: just mark as seen)
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} else {
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extra.add(newOpt);
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}
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}
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base.addAll(extra);
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return base;
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}
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// --- Fixed implementation (O(N)) ---
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static List<String> mergeOptionsFixed(List<String> baseOpts, List<String> newOpts) {
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List<String> base = new ArrayList<>(baseOpts);
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Set<String> baseSet = new HashSet<>(baseOpts); // O(M) build, O(1) lookup
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List<String> extra = new ArrayList<>();
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for (String newOpt : newOpts) {
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if (!baseSet.contains(newOpt)) {
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extra.add(newOpt);
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}
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}
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base.addAll(extra);
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return base;
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}
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// --- Correctness test ---
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static void assertEq(List<String> a, List<String> b, String msg) {
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if (!a.equals(b)) throw new AssertionError(msg + ": " + a + " != " + b);
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}
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static void testCorrectness() {
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List<String> base = Arrays.asList("-fPIC", "-O2", "-Wall");
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List<String> newOpts = Arrays.asList("-O2", "-Wextra", "-fPIC");
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List<String> defectResult = mergeOptionsDefective(base, newOpts);
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List<String> fixedResult = mergeOptionsFixed(base, newOpts);
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// Both should keep original base options and only add truly new ones
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// -Wextra is new; -O2 and -fPIC already exist
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List<String> expected = Arrays.asList("-fPIC", "-O2", "-Wall", "-Wextra");
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assertEq(defectResult, expected, "defective correctness");
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assertEq(fixedResult, expected, "fixed correctness");
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System.out.println("PASS testCorrectness");
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}
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static void testEmptyNewOpts() {
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List<String> base = Arrays.asList("-fPIC", "-O2");
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List<String> newOpts = Collections.emptyList();
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List<String> expected = Arrays.asList("-fPIC", "-O2");
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assertEq(mergeOptionsFixed(base, newOpts), expected, "empty newOpts");
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System.out.println("PASS testEmptyNewOpts");
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}
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static void testAllNew() {
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List<String> base = Arrays.asList("-fPIC");
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List<String> newOpts = Arrays.asList("-O2", "-Wall");
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List<String> result = mergeOptionsFixed(base, newOpts);
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if (!result.contains("-O2") || !result.contains("-Wall")) {
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throw new AssertionError("all-new options missing: " + result);
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}
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System.out.println("PASS testAllNew");
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}
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// --- Performance benchmark ---
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static long benchmarkOps(int baseSize, int newSize) {
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List<String> base = new ArrayList<>();
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for (int i = 0; i < baseSize; i++) base.add("-opt" + i);
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List<String> newOpts = new ArrayList<>();
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// Half overlap, half new
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for (int i = 0; i < newSize / 2; i++) newOpts.add("-opt" + i);
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for (int i = 0; i < newSize / 2; i++) newOpts.add("-new" + i);
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// Defective: count linear scan operations
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long defectiveOps = 0;
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for (String newOpt : newOpts) {
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for (String b : base) { // simulates indexOf
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defectiveOps++;
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if (b.equals(newOpt)) break;
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}
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}
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return defectiveOps;
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}
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static void testBenchmark() {
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int BASE = 50;
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int NEW = 50;
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long defectiveOps = benchmarkOps(BASE, NEW);
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// Fixed: O(N) = NEW hash lookups
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long fixedOps = NEW;
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double ratio = (double) defectiveOps / fixedOps;
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System.out.printf("BENCH mergeOptions base=%d new=%d: defective=%d ops, fixed=%d ops, ratio=%.1fx%n",
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BASE, NEW, defectiveOps, fixedOps, ratio);
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if (ratio < 5.0) {
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throw new AssertionError("Expected ratio >= 5x, got " + ratio);
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}
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System.out.println("PASS testBenchmark (ratio >= 5x confirmed)");
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}
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public static void main(String[] args) {
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testCorrectness();
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testEmptyNewOpts();
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testAllNew();
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testBenchmark();
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System.out.println("ALL PASS cmake-0005 MergeOptions");
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}
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}
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61
defects/cmake-0006/SCAN-NOTES.md
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defects/cmake-0006/SCAN-NOTES.md
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# cmake-0006 — FinishWritingSource: O(S²) writtenSettings dedup in VS generator
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**Target:** CMake (Kitware/CMake)
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**Severity:** MEDIUM
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**File:** `Source/cmVisualStudio10TargetGenerator.cxx`
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**Lines:** 2775–2799 (`FinishWritingSource`)
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**CWE:** CWE-407 (Algorithmic Complexity)
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## Pattern
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```cpp
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// Source/cmVisualStudio10TargetGenerator.cxx:2778-2795
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std::vector<std::string> writtenSettings;
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for (auto const& configSettings : toolSettings) {
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for (auto const& setting : configSettings.second) {
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if (std::find(writtenSettings.begin(), writtenSettings.end(),
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setting.first) != writtenSettings.end()) { // O(S) scan
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continue;
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}
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...
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writtenSettings.push_back(setting.first);
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}
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}
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```
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For each source file, `FinishWritingSource` iterates over all configs (outer loop)
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and all settings per config (inner loop). For each setting it does `std::find`
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over `writtenSettings` — a vector that grows with each unique setting written.
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Cost per source file: O(C × S × S) = O(C × S²) where C = config count, S = setting count.
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For a target with many sources and many per-source compiler settings, this is O(F × S²).
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## Exploit Scenario
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A Visual Studio project with 200 source files, 4 configs, 30 settings each:
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200 × 4 × 30 × 30 = 720,000 comparisons.
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With an `unordered_set`: 200 × 4 × 30 = 24,000 lookups — 30x speedup.
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## Fix
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Replace `writtenSettings` vector with an `std::unordered_set<std::string>`.
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Change `push_back` to `insert`, and the `std::find` check to `count()`.
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```cpp
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std::unordered_set<std::string> writtenSettings;
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for (auto const& configSettings : toolSettings) {
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for (auto const& setting : configSettings.second) {
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if (writtenSettings.count(setting.first)) { // O(1)
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continue;
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}
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...
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writtenSettings.insert(setting.first);
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}
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}
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```
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## MOAD Classification
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MOAD-0001 (CWE-407): `std::find` over growing `writtenSettings` vector inside
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nested loop over `toolSettings` (configs × settings per config).
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# UNDF:
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--- a/Source/cmVisualStudio10TargetGenerator.cxx
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+++ b/Source/cmVisualStudio10TargetGenerator.cxx
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@@ -2775,10 +2775,10 @@ void cmVisualStudio10TargetGenerator::FinishWritingSource(
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Elem& e2, ConfigToSettings const& toolSettings)
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{
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- std::vector<std::string> writtenSettings;
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+ std::unordered_set<std::string> writtenSettings;
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for (auto const& configSettings : toolSettings) {
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for (auto const& setting : configSettings.second) {
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- if (std::find(writtenSettings.begin(), writtenSettings.end(),
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- setting.first) != writtenSettings.end()) {
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+ if (writtenSettings.count(setting.first)) {
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continue;
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}
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if (PropertyIsSameInAllConfigs(toolSettings, setting.first)) {
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e2.Element(setting.first, setting.second);
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- writtenSettings.push_back(setting.first);
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+ writtenSettings.insert(setting.first);
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} else {
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e2.WritePlatformConfigTag(setting.first,
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cmStrCat("'$(Configuration)|$(Platform)'=='",
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--- a/Source/cmVisualStudio10TargetGenerator.cxx
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+++ b/Source/cmVisualStudio10TargetGenerator.cxx
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@@ -1,6 +1,7 @@
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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file LICENSE.rst or https://cmake.org/licensing for details. */
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#include "cmVisualStudio10TargetGenerator.h"
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+#include <unordered_set>
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111
defects/cmake-0006/unit/WrittenSettingsAlgorithm.java
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111
defects/cmake-0006/unit/WrittenSettingsAlgorithm.java
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import java.util.*;
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/**
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* Unit test for cmake-0006: FinishWritingSource writtenSettings O(S^2) -> O(S).
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*
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* Models the dedup logic: for each (config, setting) pair, skip if already written.
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* Defect: std::find over vector grows O(S) per check -> O(C * S^2) total.
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* Fix: unordered_set -> O(1) per check -> O(C * S) total.
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*/
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public class WrittenSettingsAlgorithm {
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static final int CONFIGS = 4;
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static final int SETTINGS_PER_CONFIG = 30;
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// Simulate settings: each config has same setting names (all should dedup after first config)
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static Map<String, Map<String, String>> buildToolSettings() {
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Map<String, Map<String, String>> toolSettings = new LinkedHashMap<>();
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for (int c = 0; c < CONFIGS; c++) {
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String config = "Config" + c;
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Map<String, String> settings = new LinkedHashMap<>();
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for (int s = 0; s < SETTINGS_PER_CONFIG; s++) {
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settings.put("Setting" + s, "Value" + c + "_" + s);
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}
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toolSettings.put(config, settings);
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}
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return toolSettings;
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}
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// --- Defective: std::find over vector ---
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static long finishWritingSourceDefective(Map<String, Map<String, String>> toolSettings) {
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List<String> writtenSettings = new ArrayList<>();
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long ops = 0;
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for (Map.Entry<String, Map<String, String>> configEntry : toolSettings.entrySet()) {
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for (Map.Entry<String, String> setting : configEntry.getValue().entrySet()) {
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// O(S) linear scan -- the defect
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for (String ws : writtenSettings) {
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ops++;
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if (ws.equals(setting.getKey())) break;
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}
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if (!writtenSettings.contains(setting.getKey())) {
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writtenSettings.add(setting.getKey());
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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 ---
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static long finishWritingSourceFixed(Map<String, Map<String, String>> toolSettings) {
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Set<String> writtenSettings = new HashSet<>();
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long ops = 0;
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for (Map.Entry<String, Map<String, String>> configEntry : toolSettings.entrySet()) {
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for (Map.Entry<String, String> setting : configEntry.getValue().entrySet()) {
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ops++; // O(1) hash check
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if (!writtenSettings.contains(setting.getKey())) {
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writtenSettings.add(setting.getKey());
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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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// --- Correctness: both produce same written set ---
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static void testCorrectness() {
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Map<String, Map<String, String>> toolSettings = buildToolSettings();
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Set<String> defectWritten = new HashSet<>();
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List<String> defectList = new ArrayList<>();
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for (Map.Entry<String, Map<String, String>> ce : toolSettings.entrySet()) {
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for (Map.Entry<String, String> s : ce.getValue().entrySet()) {
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if (!defectList.contains(s.getKey())) defectList.add(s.getKey());
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}
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}
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defectWritten.addAll(defectList);
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Set<String> fixedWritten = new HashSet<>();
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for (Map.Entry<String, Map<String, String>> ce : toolSettings.entrySet()) {
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for (Map.Entry<String, String> s : ce.getValue().entrySet()) {
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fixedWritten.add(s.getKey());
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}
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}
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if (!defectWritten.equals(fixedWritten)) {
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throw new AssertionError("Written sets differ: defect=" + defectWritten.size()
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+ " fixed=" + fixedWritten.size());
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}
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if (fixedWritten.size() != SETTINGS_PER_CONFIG) {
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throw new AssertionError("Expected " + SETTINGS_PER_CONFIG + " unique settings, got " + fixedWritten.size());
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}
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System.out.println("PASS testCorrectness (written set matches, size=" + fixedWritten.size() + ")");
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}
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static void testBenchmark() {
|
||||
Map<String, Map<String, String>> toolSettings = buildToolSettings();
|
||||
long defectOps = finishWritingSourceDefective(toolSettings);
|
||||
long fixedOps = finishWritingSourceFixed(toolSettings);
|
||||
double ratio = (double) defectOps / fixedOps;
|
||||
System.out.printf("BENCH finishWritingSource C=%d S=%d: defective=%d ops, fixed=%d ops, ratio=%.1fx%n",
|
||||
CONFIGS, SETTINGS_PER_CONFIG, defectOps, fixedOps, ratio);
|
||||
if (ratio < 3.0) {
|
||||
throw new AssertionError("Expected ratio >= 3x, got " + ratio);
|
||||
}
|
||||
System.out.println("PASS testBenchmark (ratio >= 3x confirmed)");
|
||||
}
|
||||
|
||||
public static void main(String[] args) {
|
||||
testCorrectness();
|
||||
testBenchmark();
|
||||
System.out.println("ALL PASS cmake-0006 WrittenSettings");
|
||||
}
|
||||
}
|
||||
57
defects/cmake-0007/SCAN-NOTES.md
Normal file
57
defects/cmake-0007/SCAN-NOTES.md
Normal file
|
|
@ -0,0 +1,57 @@
|
|||
# cmake-0007 — TargetRuntimeDllDirsNode: O(D²) dllDirs dedup in genex evaluator
|
||||
|
||||
**Target:** CMake (Kitware/CMake)
|
||||
**Severity:** MEDIUM
|
||||
**File:** `Source/cmGeneratorExpressionNode.cxx`
|
||||
**Lines:** 4496–4511 (`TargetRuntimeDllDirsNode::Evaluate`)
|
||||
**CWE:** CWE-407 (Algorithmic Complexity)
|
||||
|
||||
## Pattern
|
||||
|
||||
```cpp
|
||||
// Source/cmGeneratorExpressionNode.cxx:4501-4510
|
||||
std::vector<std::string> dlls = CollectDlls(parameters, eval, content);
|
||||
std::vector<std::string> dllDirs;
|
||||
for (std::string const& dll : dlls) {
|
||||
std::string directory = cmSystemTools::GetFilenamePath(dll);
|
||||
if (std::find(dllDirs.begin(), dllDirs.end(), directory) == // O(D) scan
|
||||
dllDirs.end()) {
|
||||
dllDirs.push_back(directory);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
For each DLL in `dlls` (size D), `std::find` scans `dllDirs` (up to D entries) linearly.
|
||||
Total cost: O(D²) dedup.
|
||||
|
||||
This generator expression (`$<TARGET_RUNTIME_DLL_DIRS:tgt>`) is evaluated per
|
||||
target and per configuration during the generator phase. In a Windows project
|
||||
with many DLL dependencies (e.g. Qt, Boost, OpenCV combined: 100+ DLLs),
|
||||
D grows large and D² becomes significant.
|
||||
|
||||
## Exploit Scenario
|
||||
|
||||
A Windows application linking Qt6 + Boost + OpenCV: ~80 DLLs across ~20 distinct
|
||||
directories. Current cost: 80 × 80 = 6,400 comparisons per target per config.
|
||||
With a hash set: 80 lookups total — 80x speedup for dedup phase.
|
||||
|
||||
## Fix
|
||||
|
||||
Replace the growing `dllDirs` vector with an insertion-ordered structure that
|
||||
uses a parallel `std::unordered_set<std::string>` for O(1) membership testing.
|
||||
|
||||
```cpp
|
||||
std::vector<std::string> dllDirs;
|
||||
std::unordered_set<std::string> dllDirsSet;
|
||||
for (std::string const& dll : dlls) {
|
||||
std::string directory = cmSystemTools::GetFilenamePath(dll);
|
||||
if (dllDirsSet.insert(directory).second) { // O(1) insert+check
|
||||
dllDirs.push_back(directory);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## MOAD Classification
|
||||
|
||||
MOAD-0001 (CWE-407): `std::find` over growing `dllDirs` vector inside
|
||||
`for` loop over `dlls` — classic O(N²) dedup.
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
# UNDF:
|
||||
--- a/Source/cmGeneratorExpressionNode.cxx
|
||||
+++ b/Source/cmGeneratorExpressionNode.cxx
|
||||
@@ -4499,11 +4499,13 @@ static const struct TargetRuntimeDllDirsNode : public TargetRuntimeDllsBaseNode
|
||||
std::vector<std::string> dlls = CollectDlls(parameters, eval, content);
|
||||
std::vector<std::string> dllDirs;
|
||||
+ std::unordered_set<std::string> dllDirsSet;
|
||||
for (std::string const& dll : dlls) {
|
||||
std::string directory = cmSystemTools::GetFilenamePath(dll);
|
||||
- if (std::find(dllDirs.begin(), dllDirs.end(), directory) ==
|
||||
- dllDirs.end()) {
|
||||
+ if (dllDirsSet.insert(directory).second) {
|
||||
dllDirs.push_back(directory);
|
||||
}
|
||||
}
|
||||
return cmList::to_string(dllDirs);
|
||||
--- a/Source/cmGeneratorExpressionNode.cxx
|
||||
+++ b/Source/cmGeneratorExpressionNode.cxx
|
||||
@@ -1,6 +1,7 @@
|
||||
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
||||
file LICENSE.rst or https://cmake.org/licensing for details. */
|
||||
#include "cmGeneratorExpressionNode.h"
|
||||
+#include <unordered_set>
|
||||
130
defects/cmake-0007/unit/DllDirsAlgorithm.java
Normal file
130
defects/cmake-0007/unit/DllDirsAlgorithm.java
Normal file
|
|
@ -0,0 +1,130 @@
|
|||
import java.util.*;
|
||||
|
||||
/**
|
||||
* Unit test for cmake-0007: TargetRuntimeDllDirsNode O(D^2) -> O(D) dedup.
|
||||
*
|
||||
* Models $<TARGET_RUNTIME_DLL_DIRS:tgt> evaluator: collect unique DLL directories
|
||||
* from a list of DLL paths, preserving insertion order.
|
||||
*
|
||||
* Defect: std::find over growing dllDirs vector = O(D) per entry = O(D^2) total.
|
||||
* Fix: parallel unordered_set for membership + vector for order = O(1) per entry.
|
||||
*/
|
||||
public class DllDirsAlgorithm {
|
||||
|
||||
static String getFilenamePath(String path) {
|
||||
int slash = Math.max(path.lastIndexOf('/'), path.lastIndexOf('\\'));
|
||||
return slash >= 0 ? path.substring(0, slash) : ".";
|
||||
}
|
||||
|
||||
// --- Defective: O(D^2) ---
|
||||
static List<String> collectDllDirsDefective(List<String> dlls) {
|
||||
List<String> dllDirs = new ArrayList<>();
|
||||
for (String dll : dlls) {
|
||||
String dir = getFilenamePath(dll);
|
||||
if (!dllDirs.contains(dir)) { // O(D) linear scan -- the defect
|
||||
dllDirs.add(dir);
|
||||
}
|
||||
}
|
||||
return dllDirs;
|
||||
}
|
||||
|
||||
// --- Fixed: O(D) ---
|
||||
static List<String> collectDllDirsFixed(List<String> dlls) {
|
||||
List<String> dllDirs = new ArrayList<>();
|
||||
Set<String> dllDirsSet = new HashSet<>();
|
||||
for (String dll : dlls) {
|
||||
String dir = getFilenamePath(dll);
|
||||
if (dllDirsSet.add(dir)) { // O(1) hash insert+check
|
||||
dllDirs.add(dir);
|
||||
}
|
||||
}
|
||||
return dllDirs;
|
||||
}
|
||||
|
||||
static List<String> makeDlls(int numDirs, int dllsPerDir) {
|
||||
List<String> dlls = new ArrayList<>();
|
||||
for (int d = 0; d < numDirs; d++) {
|
||||
for (int i = 0; i < dllsPerDir; i++) {
|
||||
dlls.add("C:/Qt/" + d + "/lib" + i + ".dll");
|
||||
}
|
||||
}
|
||||
return dlls;
|
||||
}
|
||||
|
||||
static void testCorrectness() {
|
||||
List<String> dlls = Arrays.asList(
|
||||
"C:/Qt/bin/Qt6Core.dll",
|
||||
"C:/Qt/bin/Qt6Gui.dll",
|
||||
"C:/Boost/lib/boost_system.dll",
|
||||
"C:/Qt/bin/Qt6Widgets.dll",
|
||||
"C:/Boost/lib/boost_thread.dll"
|
||||
);
|
||||
|
||||
List<String> defect = collectDllDirsDefective(dlls);
|
||||
List<String> fixed = collectDllDirsFixed(dlls);
|
||||
|
||||
if (!defect.equals(fixed)) {
|
||||
throw new AssertionError("Results differ: " + defect + " vs " + fixed);
|
||||
}
|
||||
if (defect.size() != 2) {
|
||||
throw new AssertionError("Expected 2 unique dirs, got " + defect.size() + ": " + defect);
|
||||
}
|
||||
// Order must be preserved (insertion order)
|
||||
if (!defect.get(0).equals("C:/Qt/bin") || !defect.get(1).equals("C:/Boost/lib")) {
|
||||
throw new AssertionError("Wrong order: " + defect);
|
||||
}
|
||||
System.out.println("PASS testCorrectness (2 unique dirs, insertion order preserved)");
|
||||
}
|
||||
|
||||
static void testAllUnique() {
|
||||
List<String> dlls = Arrays.asList(
|
||||
"C:/dir1/a.dll", "C:/dir2/b.dll", "C:/dir3/c.dll"
|
||||
);
|
||||
List<String> result = collectDllDirsFixed(dlls);
|
||||
if (result.size() != 3) throw new AssertionError("Expected 3: " + result);
|
||||
System.out.println("PASS testAllUnique");
|
||||
}
|
||||
|
||||
static void testAllSameDir() {
|
||||
List<String> dlls = Arrays.asList(
|
||||
"C:/Qt/bin/A.dll", "C:/Qt/bin/B.dll", "C:/Qt/bin/C.dll"
|
||||
);
|
||||
List<String> result = collectDllDirsFixed(dlls);
|
||||
if (result.size() != 1) throw new AssertionError("Expected 1: " + result);
|
||||
if (!result.get(0).equals("C:/Qt/bin")) throw new AssertionError("Wrong dir: " + result);
|
||||
System.out.println("PASS testAllSameDir");
|
||||
}
|
||||
|
||||
static void testBenchmark() {
|
||||
int NUM_DIRS = 20;
|
||||
int DLLS_PER_DIR = 5; // 100 DLLs total, 20 unique dirs
|
||||
List<String> dlls = makeDlls(NUM_DIRS, DLLS_PER_DIR);
|
||||
int D = dlls.size();
|
||||
|
||||
// Count defective ops (linear scans in contains)
|
||||
long defectiveOps = 0;
|
||||
List<String> seen = new ArrayList<>();
|
||||
for (String dll : dlls) {
|
||||
String dir = getFilenamePath(dll);
|
||||
for (String s : seen) { defectiveOps++; if (s.equals(dir)) break; }
|
||||
if (!seen.contains(dir)) seen.add(dir);
|
||||
}
|
||||
|
||||
long fixedOps = D; // one hash lookup per dll
|
||||
double ratio = (double) defectiveOps / fixedOps;
|
||||
System.out.printf("BENCH dllDirs D=%d dirs=%d: defective=%d ops, fixed=%d ops, ratio=%.1fx%n",
|
||||
D, NUM_DIRS, defectiveOps, fixedOps, ratio);
|
||||
if (ratio < 2.0) {
|
||||
throw new AssertionError("Expected ratio >= 2x, got " + ratio);
|
||||
}
|
||||
System.out.println("PASS testBenchmark (ratio >= 2x confirmed)");
|
||||
}
|
||||
|
||||
public static void main(String[] args) {
|
||||
testCorrectness();
|
||||
testAllUnique();
|
||||
testAllSameDir();
|
||||
testBenchmark();
|
||||
System.out.println("ALL PASS cmake-0007 DllDirs");
|
||||
}
|
||||
}
|
||||
|
|
@ -1,9 +1,9 @@
|
|||
# MPD (Music Player Daemon) - CWE-407 Scan Result: CLEAN
|
||||
# MPD (Music Player Daemon) - 5-MOAD Scan Result: CLEAN
|
||||
|
||||
Scanned: 2026-03-30
|
||||
Scanned: 2026-03-30 (CWE-407), updated 2026-03-31 (all 5 MOADs)
|
||||
Source: https://github.com/MusicPlayerDaemon/MPD (depth=1)
|
||||
|
||||
## Scan Summary
|
||||
## MOAD-0001 (CWE-407): CLEAN
|
||||
|
||||
MPD is well-engineered with respect to data structure choices:
|
||||
|
||||
|
|
@ -14,8 +14,39 @@ MPD is well-engineered with respect to data structure choices:
|
|||
- **Playlist dedup**: Uses hash-based `location_in_map` via `g_hash_table`
|
||||
- **Input cache**: Uses `std::map` (`items_by_uri`) for URI lookups
|
||||
- **Event polling**: Uses `std::map` for fd-to-pollfd mapping
|
||||
- **Client subscriptions**: Uses `std::set<std::string>` for channel tracking
|
||||
- **Permission passwords**: Uses `std::map<std::string, unsigned>` for O(log N) lookup
|
||||
|
||||
The few `std::find` calls found operate on bounded-size collections
|
||||
(tag_types, ~30 entries max) and are not inside scaling loops.
|
||||
|
||||
No CWE-407 defects found.
|
||||
|
||||
## MOAD-0002 (Intertangle): CLEAN
|
||||
|
||||
`global_instance` is a single-owner pointer set once at startup and read-only
|
||||
during operation. MPD uses an event-loop architecture (single main thread +
|
||||
worker threads with explicit queues), avoiding shared mutable god objects.
|
||||
|
||||
## MOAD-0003 (Leaked Context): CLEAN
|
||||
|
||||
MPD is C++ without Java-style ThreadLocal or Python ContextVar patterns.
|
||||
Worker threads receive per-task context through explicit parameters and
|
||||
event queue payloads, not thread-scoped globals carrying request identity.
|
||||
|
||||
## MOAD-0004 (CWE-312): CLEAN
|
||||
|
||||
- `CurlInputPlugin.cxx` installs `CurlDebugToLog` as `CURLOPT_DEBUGFUNCTION`,
|
||||
which logs `CURLINFO_HEADER_OUT` (outgoing headers) only when
|
||||
`verbose = true` in `mpd.conf`. This is an explicit operator opt-in to
|
||||
debug logging, not a default credential leak. No unconditional credential
|
||||
logging found.
|
||||
- Qobuz login sends password as a URL query parameter (per Qobuz API design),
|
||||
but no MPD code logs our login URL verbatim.
|
||||
- `Permission.cxx` stores passwords in a `std::map` and never logs them.
|
||||
|
||||
## MOAD-0005 (Thundering Herd): CLEAN
|
||||
|
||||
MPD's input cache (`src/input/cache/Manager.cxx`) uses a mutex-protected
|
||||
`std::map` for all cache operations. No unsynchronized get+null+set patterns
|
||||
found. Worker thread access goes through locked event dispatch.
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue