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pyricau / shark-custom-script.main.kts
Created March 27, 2024 20:57
A standalone Kotlin script that shows how to do custom heap analysis work with Shark, the heap parsing library that powers LeakCanary (see
#!/usr/bin/env kotlin
// Before running this script, install Kotlin with `brew install kotlin`
// Then run this with `kotlin shark-custom-script.main.kts`
// Edit this script in the latest Android Studio or IntelliJ IDEA releases to get dependency import and auto completion.
pyricau / CoffeeParts.kt
Last active January 17, 2024 08:43
A Dependency Injection Framework that fits in a toot:
class CoffeeLogger {
fun log(msg: String) {
interface Heater {
fun on()
fun off()
val isHot: Boolean
pyricau / compare.benchmarks.main.kts
Created September 7, 2023 00:22
A Kotlin script to compare the output of two Macrobenchmark runs, validating the data and computing the confidence interval for a difference between two means
#!/usr/bin/env kotlin
import com.squareup.moshi.Moshi
pyricau /
Last active December 19, 2022 19:13
ClassShot: detect which classes have been loaded at runtime
import android.content.Context;
import android.os.Debug;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;
import com.squareup.haha.perflib.ClassObj;
import com.squareup.haha.perflib.HprofParser;
import com.squareup.haha.perflib.Snapshot;
pyricau / Example.kt
Created June 4, 2021 20:21
A test coroutine dispatcher to reproduce race conditions
// Here's an example based on a test that was meant to reproduce a race condition,
// where we were launching several coroutines in a specific order without realizing
// that a different order would introduce race conditions. The test code here was used to
// reproduce the exact bad order.
// Note: there are probably better approaches to doing this.
val dispatcher = QueueDelegatingTestDispatcher()
// ... TODO pass in the dispatcher to the tested code launching coroutines
import android.os.Build.VERSION.SDK_INT
import android.os.Bundle
import android.os.Parcel
import android.util.Base64
* This class implements a fix for
* Investigation:
* Usage:
pyricau / WindowSpy.kt
Last active September 15, 2020 20:34
import android.annotation.TargetApi
import android.os.Build.VERSION_CODES
import android.view.View
import android.view.Window
object WindowSpy {
* Installs a listener for new [Window] instances. This should only be called once, any new call
* will uninstall the previous listener.
pyricau / AndroidLeaks.kt
Created January 15, 2020 20:45
Fixing a SpellChecker leak in Android M
* Every editable TextView has an Editor instance which has a SpellChecker instance. SpellChecker
* is in charge of displaying the little squiggle spans that show typos. SpellChecker starts a
* SpellCheckerSession as needed and then closes it when the TextView is detached from the window.
* A SpellCheckerSession is in charge of communicating with the spell checker service (which lives
* in another process) through TextServicesManager.
* The SpellChecker sends the TextView content to the spell checker service every 400ms, ie every
* time the service calls back with a result the SpellChecker schedules another check for 400ms
* later.
package com.example
import kotlin.annotation.AnnotationRetention.RUNTIME
import kotlin.annotation.AnnotationTarget.FUNCTION
* @see TracingRunListener