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Rename gcCountBuffer to numberOfGcCycles. #101

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Jul 24, 2023
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4 changes: 4 additions & 0 deletions pkgs/leak_tracker/CHANGELOG.md
Original file line number Diff line number Diff line change
@@ -1,3 +1,7 @@
# 9.0.0

* Rename `gcCountBuffer` to `numberOfGcCycles` and `disposalTimeBuffer` to `disposalTime`.

# 8.0.3

* Fix an issue with custom gcCountBuffer values.
Expand Down
8 changes: 4 additions & 4 deletions pkgs/leak_tracker/lib/src/leak_tracking/_gc_counter.dart
Original file line number Diff line number Diff line change
Expand Up @@ -18,8 +18,8 @@ bool shouldObjectBeGced({
required DateTime timeAtDisposal,
required int currentGcCount,
required DateTime currentTime,
required Duration disposalTimeBuffer,
required int gcCountBuffer,
required Duration disposalTime,
required int numberOfGcCycles,
}) =>
currentGcCount - gcCountAtDisposal >= gcCountBuffer &&
currentTime.difference(timeAtDisposal) >= disposalTimeBuffer;
currentGcCount - gcCountAtDisposal >= numberOfGcCycles &&
currentTime.difference(timeAtDisposal) >= disposalTime;
14 changes: 7 additions & 7 deletions pkgs/leak_tracker/lib/src/leak_tracking/_object_record.dart
Original file line number Diff line number Diff line change
Expand Up @@ -116,33 +116,33 @@ class ObjectRecord {
bool get isGCed => _gcedGcCount != null;
bool get isDisposed => _disposalGcCount != null;

bool isGCedLateLeak(Duration disposalTimeBuffer, int gcCountBuffer) {
bool isGCedLateLeak(Duration disposalTime, int numberOfGcCycles) {
if (_disposalGcCount == null || _gcedGcCount == null) return false;
assert(_gcedTime != null);
return shouldObjectBeGced(
gcCountAtDisposal: _disposalGcCount!,
timeAtDisposal: _disposalTime!,
currentGcCount: _gcedGcCount!,
currentTime: _gcedTime!,
disposalTimeBuffer: disposalTimeBuffer,
gcCountBuffer: gcCountBuffer,
disposalTime: disposalTime,
numberOfGcCycles: numberOfGcCycles,
);
}

bool isNotGCedLeak(
int currentGcCount,
DateTime currentTime,
Duration disposalTimeBuffer,
int gcCountBuffer,
Duration disposalTime,
int numberOfGcCycles,
) {
if (_gcedGcCount != null) return false;
return shouldObjectBeGced(
gcCountAtDisposal: _disposalGcCount!,
timeAtDisposal: _disposalTime!,
currentGcCount: currentGcCount,
currentTime: currentTime,
disposalTimeBuffer: disposalTimeBuffer,
gcCountBuffer: gcCountBuffer,
disposalTime: disposalTime,
numberOfGcCycles: numberOfGcCycles,
);
}

Expand Down
14 changes: 7 additions & 7 deletions pkgs/leak_tracker/lib/src/leak_tracking/_object_tracker.dart
Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,8 @@ class ObjectTracker implements LeakProvider {
/// The optional parameters are injected for testing purposes.
ObjectTracker({
this.leakDiagnosticConfig = const LeakDiagnosticConfig(),
required this.disposalTimeBuffer,
required this.gcCountBuffer,
required this.disposalTime,
required this.numberOfGcCycles,
FinalizerBuilder? finalizerBuilder,
GcCounter? gcCounter,
IdentityHashCoder? coder,
Expand All @@ -40,7 +40,7 @@ class ObjectTracker implements LeakProvider {
late IdentityHashCoder _coder;

/// Time to allow the disposal invoker to release the reference to the object.
final Duration disposalTimeBuffer;
final Duration disposalTime;

late FinalizerWrapper _finalizer;

Expand All @@ -52,7 +52,7 @@ class ObjectTracker implements LeakProvider {

final LeakDiagnosticConfig leakDiagnosticConfig;

final int gcCountBuffer;
final int numberOfGcCycles;

void startTracking(
Object object, {
Expand Down Expand Up @@ -93,7 +93,7 @@ class ObjectTracker implements LeakProvider {
final record = _notGCed(code);
record.setGCed(_gcCounter.gcCount, clock.now());

if (record.isGCedLateLeak(disposalTimeBuffer, gcCountBuffer)) {
if (record.isGCedLateLeak(disposalTime, numberOfGcCycles)) {
_objects.gcedLateLeaks.add(record);
} else if (record.isNotDisposedLeak) {
_objects.gcedNotDisposedLeaks.add(record);
Expand Down Expand Up @@ -181,8 +181,8 @@ class ObjectTracker implements LeakProvider {
if (_notGCed(code).isNotGCedLeak(
_gcCounter.gcCount,
now,
disposalTimeBuffer,
gcCountBuffer,
disposalTime,
numberOfGcCycles,
)) {
_objects.notGCedDisposedOk.remove(code);
_objects.notGCedDisposedLate.add(code);
Expand Down
4 changes: 2 additions & 2 deletions pkgs/leak_tracker/lib/src/leak_tracking/leak_tracker.dart
Original file line number Diff line number Diff line change
Expand Up @@ -46,8 +46,8 @@ void enableLeakTracking({

final newTracker = ObjectTracker(
leakDiagnosticConfig: theConfig.leakDiagnosticConfig,
disposalTimeBuffer: theConfig.disposalTimeBuffer,
gcCountBuffer: theConfig.gcCountBuffer,
disposalTime: theConfig.disposalTime,
numberOfGcCycles: theConfig.numberOfGcCycles,
);

_objectTracker.value = newTracker;
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -85,17 +85,17 @@ class LeakDiagnosticConfig {
///
/// Theoretically, 2 should be enough, however it gives false positives
/// if there is no activity in the application for ~5 minutes.
const defaultGcCountBuffer = 3;
const defaultNumberOfGcCycles = 3;

class LeakTrackingConfiguration {
const LeakTrackingConfiguration({
this.stdoutLeaks = true,
this.notifyDevTools = true,
this.onLeaks,
this.checkPeriod = const Duration(seconds: 1),
this.disposalTimeBuffer = const Duration(milliseconds: 100),
this.disposalTime = const Duration(milliseconds: 100),
this.leakDiagnosticConfig = const LeakDiagnosticConfig(),
this.gcCountBuffer = defaultGcCountBuffer,
this.numberOfGcCycles = defaultNumberOfGcCycles,
});

/// The leak tracker:
Expand All @@ -105,18 +105,18 @@ class LeakTrackingConfiguration {
/// at the moment of leak checking.
LeakTrackingConfiguration.passive({
LeakDiagnosticConfig leakDiagnosticConfig = const LeakDiagnosticConfig(),
int gcCountBuffer = defaultGcCountBuffer,
int numberOfGcCycles = defaultNumberOfGcCycles,
}) : this(
stdoutLeaks: false,
notifyDevTools: false,
checkPeriod: null,
disposalTimeBuffer: const Duration(),
disposalTime: const Duration(),
leakDiagnosticConfig: leakDiagnosticConfig,
gcCountBuffer: gcCountBuffer,
numberOfGcCycles: numberOfGcCycles,
);

/// Number of full GC cycles, enough for a non reachable object to be GCed.
final int gcCountBuffer;
final int numberOfGcCycles;

final LeakDiagnosticConfig leakDiagnosticConfig;

Expand All @@ -135,7 +135,7 @@ class LeakTrackingConfiguration {
final LeakSummaryCallback? onLeaks;

/// Time to allow the disposal invoker to release the reference to the object.
final Duration disposalTimeBuffer;
final Duration disposalTime;
}

/// Configuration for leak tracking in unit tests.
Expand Down
16 changes: 8 additions & 8 deletions pkgs/leak_tracker/lib/src/leak_tracking/orchestration.dart
Original file line number Diff line number Diff line change
Expand Up @@ -45,13 +45,13 @@ class MemoryLeaksDetectedError extends StateError {
/// to wait infinitely for the forced garbage collection, that is needed
/// to analyse results.
///
/// [gcCountBuffer] is number of full GC cycles, that should be enough for
/// [numberOfGcCycles] is number of full GC cycles, that should be enough for
/// a non reachable object to be GCed.
/// If after this number of GC cycles a disposed object is still not garbage collected,
/// it is considered a notGCed leak.
/// Theoretically, the value 1 should be enough, but in practice it creates false
/// positives for stale applications.
/// So, recommended value for applications is 3, and for tests is 1.
/// So, recommended value for applications is 3, and for tests is 2.
///
/// If you test Flutter widgets, connect their instrumentation to the leak
/// tracker:
Expand Down Expand Up @@ -87,12 +87,12 @@ Future<Leaks> withLeakTracking(
Duration? timeoutForFinalGarbageCollection,
LeakDiagnosticConfig leakDiagnosticConfig = const LeakDiagnosticConfig(),
AsyncCodeRunner? asyncCodeRunner,
int gcCountBuffer = defaultGcCountBuffer,
int numberOfGcCycles = defaultNumberOfGcCycles,
}) async {
if (gcCountBuffer <= 0) {
if (numberOfGcCycles <= 0) {
throw ArgumentError.value(
gcCountBuffer,
'gcCountBuffer',
numberOfGcCycles,
'numberOfGcCycles',
'Must be positive.',
);
}
Expand All @@ -103,7 +103,7 @@ Future<Leaks> withLeakTracking(
resetIfAlreadyEnabled: true,
config: LeakTrackingConfiguration.passive(
leakDiagnosticConfig: leakDiagnosticConfig,
gcCountBuffer: gcCountBuffer,
numberOfGcCycles: numberOfGcCycles,
),
);

Expand All @@ -123,7 +123,7 @@ Future<Leaks> withLeakTracking(
}

await forceGC(
fullGcCycles: gcCountBuffer,
fullGcCycles: numberOfGcCycles,
timeout: timeoutForFinalGarbageCollection,
);
leaks = await collectLeaks();
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,9 @@ void main() {

tearDown(() => disableLeakTracking());

for (var gcCountBuffer in [1, defaultGcCountBuffer]) {
test('Leak tracker respects maxRequestsForRetainingPath, $gcCountBuffer.',
for (var numberOfGcCycles in [1, defaultNumberOfGcCycles]) {
test(
'Leak tracker respects maxRequestsForRetainingPath, $numberOfGcCycles.',
() async {
LeakTrackerGlobalSettings.maxRequestsForRetainingPath = 2;
final leaks = await withLeakTracking(
Expand All @@ -30,7 +31,7 @@ void main() {
leakDiagnosticConfig: const LeakDiagnosticConfig(
collectRetainingPathForNonGCed: true,
),
gcCountBuffer: gcCountBuffer,
numberOfGcCycles: numberOfGcCycles,
);

const pathHeader = ' path: >';
Expand All @@ -52,7 +53,7 @@ void main() {
);
});

test('Retaining path for not GCed object is reported, $gcCountBuffer.',
test('Retaining path for not GCed object is reported, $numberOfGcCycles.',
() async {
final leaks = await withLeakTracking(
() async {
Expand All @@ -62,7 +63,7 @@ void main() {
leakDiagnosticConfig: const LeakDiagnosticConfig(
collectRetainingPathForNonGCed: true,
),
gcCountBuffer: gcCountBuffer,
numberOfGcCycles: numberOfGcCycles,
);

const expectedRetainingPathTails = [
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -10,16 +10,16 @@ void main() {
test('shouldObjectBeGced', () {
final now = DateTime(2022);
const gcNow = 1000;
const disposalTimeBuffer = Duration(milliseconds: 100);
const timeToDispose = Duration(milliseconds: 100);

bool shouldBeGced(int disposalGcCount, DateTime disposalTime) =>
shouldObjectBeGced(
gcCountAtDisposal: disposalGcCount,
timeAtDisposal: disposalTime,
currentGcCount: gcNow,
currentTime: now,
disposalTimeBuffer: disposalTimeBuffer,
gcCountBuffer: defaultGcCountBuffer,
disposalTime: timeToDispose,
numberOfGcCycles: defaultNumberOfGcCycles,
);

final forJustGcEd = shouldBeGced(gcNow, now);
Expand All @@ -33,8 +33,8 @@ void main() {
expect(forNotEnoughGc, isFalse);

final forEnoughTimeAndGc = shouldBeGced(
gcNow - defaultGcCountBuffer,
now.subtract(disposalTimeBuffer),
gcNow - defaultNumberOfGcCycles,
now.subtract(timeToDispose),
);
expect(forEnoughTimeAndGc, isTrue);
});
Expand Down
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