[!NOTE] Please review this page in the wiki for a deeper dive into all the changes.

[!NOTE] We're naming this v2.6.0 to be clear that we expect it to be 100% compatible, non-source breaking with v2.5.1. Please report any issues you may find.

• Fix memory safety issues and buffer handling bugs by @naftaly in https://github.com/kstenerud/KSCrash/pull/723
• Fix flaky tests by @naftaly in https://github.com/kstenerud/KSCrash/pull/727
• Add performance benchmarks by @naftaly in https://github.com/kstenerud/KSCrash/pull/721
• Fix memory monitor safety improvements by @naftaly in https://github.com/kstenerud/KSCrash/pull/725
• Optimize KSBinaryImageCache and KSDynamicLinker performance by @naftaly in https://github.com/kstenerud/KSCrash/pull/722
• Update CI runners from macos-13 to macos-14 by @naftaly in https://github.com/kstenerud/KSCrash/pull/728
• Fix uninitialized g_stackCursor crash in background threads (#712) by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/717
• Add Watchdog Monitor by @naftaly in https://github.com/kstenerud/KSCrash/pull/726
• Fix symbolication regression in KSBinaryImageCache by @naftaly in https://github.com/kstenerud/KSCrash/pull/731
• Remove Namespace Check Workflow by @naftaly in https://github.com/kstenerud/KSCrash/pull/734
• Fix sanitizer compatibility and add sanitizer CI by @naftaly in https://github.com/kstenerud/KSCrash/pull/733
• fix: watchdog monitor now collects threads by @naftaly in https://github.com/kstenerud/KSCrash/pull/730
• Fix sanitizer issues and Mach port leak by @naftaly in https://github.com/kstenerud/KSCrash/pull/736
• Add standard deviation column to benchmark results by @naftaly in https://github.com/kstenerud/KSCrash/pull/735
• Fix benchmarks workflow for fork PRs by @naftaly in https://github.com/kstenerud/KSCrash/pull/738
• Add CI workflow for Clang static analyzer by @naftaly in https://github.com/kstenerud/KSCrash/pull/744
• Fix thread safety issues in memory tracking by @naftaly in https://github.com/kstenerud/KSCrash/pull/742
• Fix memory leaks, optimize binary image cache, add leaks CI by @naftaly in https://github.com/kstenerud/KSCrash/pull/740
• Use lock-free atomic container for userInfoJSON thread safety by @naftaly in https://github.com/kstenerud/KSCrash/pull/741
• [RFC] Introducing Sampling Profiler by @naftaly in https://github.com/kstenerud/KSCrash/pull/732
• Add Report Swift target for a type safe crash report structure by @naftaly in https://github.com/kstenerud/KSCrash/pull/729
• Add cpu info to backtrace symbolication by @maxep in https://github.com/kstenerud/KSCrash/pull/737
• Fix static analyzer warnings by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/749
• Make leaks CI failable on real memory leaks by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/750
• Fix undefined behavior issues detected by UBSan by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/751
• Fix flaky testOtherThreadSymbolicate test by @naftaly in https://github.com/kstenerud/KSCrash/pull/755
• __cxa_throw swapper upgrades by @naftaly in https://github.com/kstenerud/KSCrash/pull/753
• Use ptrauth_strip for PAC handling instead of hardcoded mask by @naftaly in https://github.com/kstenerud/KSCrash/pull/756
• Prepare Benchmarks For OnDevice Runs by @naftaly in https://github.com/kstenerud/KSCrash/pull/754
• Convert KSCrashReportFixer to Objective-C and improve symbol resolution by @naftaly in https://github.com/kstenerud/KSCrash/pull/761
• Fix crash handler deadlock when Watchdog monitor is enabled by @naftaly in https://github.com/kstenerud/KSCrash/pull/758
• Add compact unwind and DWARF CFI support for stack unwinding by @naftaly in https://github.com/kstenerud/KSCrash/pull/757
• Security improvements for OpenSSF Scorecard by @naftaly in https://github.com/kstenerud/KSCrash/pull/765
• ci: bump the github-actions group with 4 updates by @dependabot[bot] in https://github.com/kstenerud/KSCrash/pull/766
• Restore pre-profiler deployment targets by @naftaly in https://github.com/kstenerud/KSCrash/pull/773
• Add visionOS 1.0 platform support to SPM by @naftaly in https://github.com/kstenerud/KSCrash/pull/775
• ci: add Infer static analysis and fix PR comments for fork PRs by @naftaly in https://github.com/kstenerud/KSCrash/pull/769
• Improve OOM handling and async-signal-safety by @naftaly in https://github.com/kstenerud/KSCrash/pull/768
• Add backtrace truncation detection and KSCrash+Backtrace category by @naftaly in https://github.com/kstenerud/KSCrash/pull/767
• Improve CI tooling and add namespace check workflow by @naftaly in https://github.com/kstenerud/KSCrash/pull/776
• Add BrowserStack CI integration for benchmarks by @naftaly in https://github.com/kstenerud/KSCrash/pull/762
• Fix ARM64 spurious frame after thread_start during stack unwinding by @naftaly in https://github.com/kstenerud/KSCrash/pull/764
• Fix async-signal-safety crash in monitor disable path by @naftaly in https://github.com/kstenerud/KSCrash/pull/770
• ci: bump the github-actions group with 3 updates by @dependabot[bot] in https://github.com/kstenerud/KSCrash/pull/779
• Fix benchmarks workflow secret availability check by @naftaly in https://github.com/kstenerud/KSCrash/pull/780
• Add monitor sidecar infrastructure and rewrite watchdog to pure C by @naftaly in https://github.com/kstenerud/KSCrash/pull/771
• [EASY] Fix os_version reporting host macOS build on simulator by @naftaly in https://github.com/kstenerud/KSCrash/pull/782
• Add MetricKit crash monitor plugin by @naftaly in https://github.com/kstenerud/KSCrash/pull/774
• Add compact binary image reporting and inline object_uuid on frames by @naftaly in https://github.com/kstenerud/KSCrash/pull/777
• Add last_exception_backtrace for exception crashes by @naftaly in https://github.com/kstenerud/KSCrash/pull/778
• Add run sidecars for per-process-run sidecar data by @naftaly in https://github.com/kstenerud/KSCrash/pull/783
• Convert system monitor to mmap'd run sidecar by @naftaly in https://github.com/kstenerud/KSCrash/pull/784
• Refactor CLAUDE.md into .claude/rules/ for path-scoped loading by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/789
• Convert AppState monitor to mmap'd Lifecycle run sidecar by @naftaly in https://github.com/kstenerud/KSCrash/pull/786
• Correctness fixes, hang reporting config, and Report model improvements by @naftaly in https://github.com/kstenerud/KSCrash/pull/787
• ci: bump the github-actions group with 2 updates by @dependabot[bot] in https://github.com/kstenerud/KSCrash/pull/791
• Skip crash report for SIGTERM by @naftaly in https://github.com/kstenerud/KSCrash/pull/793
• ci: add binary size analysis for PRs by @naftaly in https://github.com/kstenerud/KSCrash/pull/792
• Add UserInfo monitor with reusable KSKeyValueStore by @naftaly in https://github.com/kstenerud/KSCrash/pull/788
• Add passive Resource monitor by @naftaly in https://github.com/kstenerud/KSCrash/pull/790
• Add ResourceTermination monitor for post-mortem termination detection by @naftaly in https://github.com/kstenerud/KSCrash/pull/794
• Add task role tracking to Lifecycle monitor by @naftaly in https://github.com/kstenerud/KSCrash/pull/795
• ci: bump jdx/mise-action from 3 to 4 in the github-actions group by @dependabot[bot] in https://github.com/kstenerud/KSCrash/pull/797
• ci: report Infer results as a neutral check run by @naftaly in https://github.com/kstenerud/KSCrash/pull/800
• Fix Zombie monitor hang and enable proper disable by @naftaly in https://github.com/kstenerud/KSCrash/pull/798
• Fix test reliability and add Tuist Derived to gitignore by @naftaly in https://github.com/kstenerud/KSCrash/pull/799
• Fix data race in KSReachabilityKSCrash initializer by @naftaly in https://github.com/kstenerud/KSCrash/pull/801
• Termination monitor, RunContext shared layer, and integration tests by @naftaly in https://github.com/kstenerud/KSCrash/pull/796
• Replace snprintf with async-signal-safe string conversion in crash-time code by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/804
• Update nullability for several interfaces, add some missing designated initializer stuff too by @alanzeino in https://github.com/kstenerud/KSCrash/pull/711
• Finalize recovered hang reports with live system data by @naftaly in https://github.com/kstenerud/KSCrash/pull/802
• Add fork PR guards to CI workflows by @naftaly in https://github.com/kstenerud/KSCrash/pull/805
• Refactor stitch pipeline to parse once, stitch all, encode once by @naftaly in https://github.com/kstenerud/KSCrash/pull/803
• Fix mach.subcode always 0 due to 32-bit/64-bit struct mismatch by @naftaly in https://github.com/kstenerud/KSCrash/pull/811
• Finalize non-fatal reports immediately by @naftaly in https://github.com/kstenerud/KSCrash/pull/806
• ci: bump actions/github-script from 7 to 8 in the github-actions group by @dependabot[bot] in https://github.com/kstenerud/KSCrash/pull/807
• Collapse category sections in benchmark report by @naftaly in https://github.com/kstenerud/KSCrash/pull/812
• fix: zero mach code/subcode in watchdog fatal hang reports by @naftaly in https://github.com/kstenerud/KSCrash/pull/813
• fix: add missing signal code to injected termination reports by @naftaly in https://github.com/kstenerud/KSCrash/pull/814
• Track app transition state in hang reports, suppress startup hangs by @naftaly in https://github.com/kstenerud/KSCrash/pull/808
• [2] Track app transition state in hang reports, suppress startup hangs by @naftaly in https://github.com/kstenerud/KSCrash/pull/817
• Add API: ksbt_captureBacktraceFromSuspendedMachThread by @kstenerud in https://github.com/kstenerud/KSCrash/pull/816
• Add missing none case to Swift TerminationReason enum by @naftaly in https://github.com/kstenerud/KSCrash/pull/818
• Add async-signal-safety-review skill by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/820
• fix: watchdog stitch no longer overwrites is_fatal on non-watchdog reports by @naftaly in https://github.com/kstenerud/KSCrash/pull/822
• ci: bump actions/github-script from 8 to 9 in the github-actions group by @dependabot[bot] in https://github.com/kstenerud/KSCrash/pull/823
• Fix async-signal-safety violations in JSON codec and logger by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/821
• Let consumers opt out of KSLogger.h's DEBUG/ERROR/etc. aliases by @naftaly in https://github.com/kstenerud/KSCrash/pull/824
• ci: rework release workflow for reversibility by @naftaly in https://github.com/kstenerud/KSCrash/pull/825

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.5.0...2.6.0-beta.1

• Fix uninitialized g_stackCursor crash in background threads by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/717
• Fix memory safety issues and buffer handling bugs by @naftaly in https://github.com/kstenerud/KSCrash/pull/723
• Fix memory monitor safety improvements by @naftaly in https://github.com/kstenerud/KSCrash/pull/725
• Fix thread safety issues in memory tracking by @naftaly in https://github.com/kstenerud/KSCrash/pull/742
• Fix static analyzer warnings by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/749
• Fix undefined behavior issues detected by UBSan by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/751
• Fix flaky testOtherThreadSymbolicate test by @naftaly in https://github.com/kstenerud/KSCrash/pull/755
• Fix unsigned integer underflow in imageContainingAddress by @naftaly in https://github.com/kstenerud/KSCrash/pull/763

• Add cpu info to backtrace symbolication by @maxep in https://github.com/kstenerud/KSCrash/pull/737

• Update CI runners from macos-13 to macos-14 by @naftaly in https://github.com/kstenerud/KSCrash/pull/728
• Add CI workflow for Clang static analyzer by @naftaly in https://github.com/kstenerud/KSCrash/pull/744

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.5.0...2.5.1

• Fix outdated headerdoc reference in KSCrashInstallation by @alanzeino in https://github.com/kstenerud/KSCrash/pull/710
• Enable module definition in KSCrash podspec by @maxep in https://github.com/kstenerud/KSCrash/pull/714
• Fix watchOS Compilation Errors by @maxep in https://github.com/kstenerud/KSCrash/pull/715
• Fix arm64e build by @maxep in https://github.com/kstenerud/KSCrash/pull/716

• @maxep made their first contribution in https://github.com/kstenerud/KSCrash/pull/714

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.4.0...2.5.0

• Make monitor API functions properly idempotent using atomics by @kstenerud in https://github.com/kstenerud/KSCrash/pull/661
• Add binary architecture field to system info by @DariaKunoichi in https://github.com/kstenerud/KSCrash/pull/669
• Add improved jailbreak detection logic by @DariaKunoichi in https://github.com/kstenerud/KSCrash/pull/666
• Add clang_version, device free storage size and rosetta check fields to system info by @DariaKunoichi in https://github.com/kstenerud/KSCrash/pull/668
• Convert KSCrashMonitor to use a lockless algorithm by @kstenerud in https://github.com/kstenerud/KSCrash/pull/662
• Moved monitor context management into KSCrashMonitor. by @kstenerud in https://github.com/kstenerud/KSCrash/pull/674
• Restore recrash support to the mach exception handler by @kstenerud in https://github.com/kstenerud/KSCrash/pull/675
• Added a policy argument to all callbacks so that callback implementations can more intelligently decide what to do. by @kstenerud in https://github.com/kstenerud/KSCrash/pull/676
• KSFileUtils won't compile standalone without stddef.h by @kstenerud in https://github.com/kstenerud/KSCrash/pull/685
• [KSCRASH] Allow Cancelling Processing/Writting a Crash by @naftaly in https://github.com/kstenerud/KSCrash/pull/680
• [KSCRASH] Add Observers to Memory Tracker by @naftaly in https://github.com/kstenerud/KSCrash/pull/681
• [KSCRASH] Make CPP Monitor more precise by @naftaly in https://github.com/kstenerud/KSCrash/pull/682
• [EASY] Add back start/stop for backwards compat by @naftaly in https://github.com/kstenerud/KSCrash/pull/686
• Fix incorrectly defined KSCRASH_NAMESPACE_STRING by @kstenerud in https://github.com/kstenerud/KSCrash/pull/687
• Pin Tuist version using Mise for consistent environments by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/688
• Clean up pragma and example app warnings by @kstenerud in https://github.com/kstenerud/KSCrash/pull/689
• Fix same self thread backtrace by @naftaly in https://github.com/kstenerud/KSCrash/pull/690
• [2.x] Add backward compatibility for callback API changes by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/684
• Modify KSCrashEventNotifyCallback to return a user-supplied policy by @kstenerud in https://github.com/kstenerud/KSCrash/pull/692
• We should still attempt to record threads even if we can't suspend them. by @kstenerud in https://github.com/kstenerud/KSCrash/pull/693
• Add GitHub Copilot code review instructions for API breaking changes by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/695
• Expose an intermediate struct to the user rather than our internal struct by @kstenerud in https://github.com/kstenerud/KSCrash/pull/694
• Always record the offending thread at least by @kstenerud in https://github.com/kstenerud/KSCrash/pull/696
• Harmonize the callback names by @kstenerud in https://github.com/kstenerud/KSCrash/pull/697
• Fix monitor disabling and uninstalling by @kstenerud in https://github.com/kstenerud/KSCrash/pull/698
• Namespace any important strings, such as paths and thread names by @kstenerud in https://github.com/kstenerud/KSCrash/pull/699
• Fix some latent warning issues by @kstenerud in https://github.com/kstenerud/KSCrash/pull/700
• Fix error pointer checks by @alanzeino in https://github.com/kstenerud/KSCrash/pull/701
• Namespacing example using SPM by @kstenerud in https://github.com/kstenerud/KSCrash/pull/704
• Update the codebase for the next Xcode version. by @kstenerud in https://github.com/kstenerud/KSCrash/pull/706
• Remove remaining namespace code and header search paths around the old demangler by @kstenerud in https://github.com/kstenerud/KSCrash/pull/707
• Remove direct dependency between the signal and memory monitors by @kstenerud in https://github.com/kstenerud/KSCrash/pull/705

• @alanzeino made their first contribution in https://github.com/kstenerud/KSCrash/pull/701

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.3.0...2.4.0

• Fix Xcode 26 beta 1 warning about VLA folding by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/641
• Remove cyclic dependency between the NSException monitor and the top-level KSCrash class by @kstenerud in https://github.com/kstenerud/KSCrash/pull/646
• Add support for custom namespacing by @kstenerud in https://github.com/kstenerud/KSCrash/pull/647
• Added missing Foundation.h header by @kstenerud in https://github.com/kstenerud/KSCrash/pull/648
• Move KSThreadCache.h into the include directory of KSCrashRecording by @kstenerud in https://github.com/kstenerud/KSCrash/pull/649
• Use latest-stable in unit-tests by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/650
• Enable warnings-as-errors, and as many warnings as we can get away with by @kstenerud in https://github.com/kstenerud/KSCrash/pull/653
• Add more class names to the namespacer that clang missed by @kstenerud in https://github.com/kstenerud/KSCrash/pull/652
• Forward Mach exceptions to the next handler by @kstenerud in https://github.com/kstenerud/KSCrash/pull/651
• Add thread run state string to report by @DariaKunoichi in https://github.com/kstenerud/KSCrash/pull/645
• Binary Image Cleanup by @naftaly in https://github.com/kstenerud/KSCrash/pull/655
• Make KSCrashMonitor.c solely responsible for event IDs by @kstenerud in https://github.com/kstenerud/KSCrash/pull/658
• [EASY] fix off by one error in arm64.c by @naftaly in https://github.com/kstenerud/KSCrash/pull/660
• Invert dependency from individual monitors to KSCrashMonitor.c, using DI instead. by @kstenerud in https://github.com/kstenerud/KSCrash/pull/659
• Raise max captured thread count to 1000 by @DariaKunoichi in https://github.com/kstenerud/KSCrash/pull/664
• Report Version Based Timestamp Mixup Fix by @naftaly in https://github.com/kstenerud/KSCrash/pull/663
• Add script to toggle unsafe flags in Package.swift for release process by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/673

• @DariaKunoichi made their first contribution in https://github.com/kstenerud/KSCrash/pull/645

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.2.0...2.3.0

This RC version was published due to a limitation in Swift Package Manager (SPM), which forbids the use of unsafeFlags in release builds. Until this is resolved, the package is distributed as a release candidate.

• Fix Xcode 26 beta 1 warning about VLA folding by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/641
• Remove cyclic dependency between the NSException monitor and the top-level KSCrash class by @kstenerud in https://github.com/kstenerud/KSCrash/pull/646
• Add support for custom namespacing by @kstenerud in https://github.com/kstenerud/KSCrash/pull/647
• Added missing Foundation.h header by @kstenerud in https://github.com/kstenerud/KSCrash/pull/648
• Move KSThreadCache.h into the include directory of KSCrashRecording by @kstenerud in https://github.com/kstenerud/KSCrash/pull/649
• Use latest-stable in unit-tests by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/650
• Enable warnings-as-errors, and as many warnings as we can get away with by @kstenerud in https://github.com/kstenerud/KSCrash/pull/653
• Add more class names to the namespacer that clang missed by @kstenerud in https://github.com/kstenerud/KSCrash/pull/652
• Forward Mach exceptions to the next handler by @kstenerud in https://github.com/kstenerud/KSCrash/pull/651
• Add thread run state string to report by @DariaKunoichi in https://github.com/kstenerud/KSCrash/pull/645
• Binary Image Cleanup by @naftaly in https://github.com/kstenerud/KSCrash/pull/655
• Make KSCrashMonitor.c solely responsible for event IDs by @kstenerud in https://github.com/kstenerud/KSCrash/pull/658
• [EASY] fix off by one error in arm64.c by @naftaly in https://github.com/kstenerud/KSCrash/pull/660
• Invert dependency from individual monitors to KSCrashMonitor.c, using DI instead. by @kstenerud in https://github.com/kstenerud/KSCrash/pull/659
• Raise max captured thread count to 1000 by @DariaKunoichi in https://github.com/kstenerud/KSCrash/pull/664

• @DariaKunoichi made their first contribution in https://github.com/kstenerud/KSCrash/pull/645

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.2.0...2.3.0-rc.1

• Add swift-format to project and CI by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/637
• Introduce KSCrashBacktrace by @naftaly in https://github.com/kstenerud/KSCrash/pull/634
• Enlarge Binary Image Cache Size by @naftaly in https://github.com/kstenerud/KSCrash/pull/639

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.1.2...2.2.0

• Update release workflow: Remove test functionality and add publish_only option by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/629
• Fix data race in memory monitor by @naftaly in https://github.com/kstenerud/KSCrash/pull/631

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.1.1...2.1.2

• Fix release workflow and add dry-run testing mode by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/625
• Explicitly link against zlib by @adincebic in https://github.com/kstenerud/KSCrash/pull/627

• @adincebic made their first contribution in https://github.com/kstenerud/KSCrash/pull/627

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.1.0...2.1.1

• Add Swift version setting to Tuist project configuration by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/611
• Add os_unfair_lock for thread safety in KSCrashMonitor by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/610
• Return properly typed reports from KSCrashReportFilterConcatenate by @tmolitor-stud-tu in https://github.com/kstenerud/KSCrash/pull/616
• Use active delay instead of waiting for crash on macOS by @bamx23 in https://github.com/kstenerud/KSCrash/pull/618
• Fix Ruby version specification in Gemfile by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/621
• Add binary image caching with thread safety in KSDynamicLinker by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/614
• fix config reportWrittenCallback by @tamwei in https://github.com/kstenerud/KSCrash/pull/622
• Add tests for reportWrittenCallback functionality by @GLinnik21 in https://github.com/kstenerud/KSCrash/pull/623

• @tamwei made their first contribution in https://github.com/kstenerud/KSCrash/pull/622

Full Changelog: https://github.com/kstenerud/KSCrash/compare/2.0.0...2.1.0