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Key:
JDK-X - https://bugs.openjdk.java.net/browse/JDK-X
CVE-XXXX-YYYY: https://cve.mitre.org/cgi-bin/cvename.cgi?name=XXXX-YYYY
New in release OpenJDK 20.0.2 (2023-07-18):
===========================================
* CVEs
- CVE-2023-22041
- CVE-2023-22051
- CVE-2023-25193
- CVE-2023-22044
- CVE-2023-22045
- CVE-2023-22049
- CVE-2023-22036
- CVE-2023-22006
* Security fixes
- JDK-8299945: Update the release version after forking Apr CPU23_04
- JDK-8299946: Update the Jul CPU23_07 release date in master branch after forking Apr CPU23_04
- JDK-8299129: Enhance NameService lookups
- JDK-8295304: Runtime support improvements
- JDK-8300285: Enhance TLS data handling
- JDK-8298676: Enhanced Look and Feel
- JDK-8304460: Improve array usages
- JDK-8304468: Better array usages
- JDK-8302483: Enhance ZIP performance
- JDK-8305565: Incorrect milestone for release JDK 20.0.2
- JDK-8300596: Enhance Jar Signature validation
- JDK-8302475: Enhance HTTP client file downloading
- JDK-8305421: Work around JDK-8305420 in CDSJDITest.java
- JDK-8294323: Improve Shared Class Data
- JDK-8305312: Enhanced path handling
- JDK-8296565: Enhanced archival support
- JDK-8306049: Change milestone to fcs for all releases
- JDK-8303376: Better launching of JDI
- JDK-8308682: Enhance AES performance
* Other changes
- JDK-8304741: C2 Intrinsification of Float.floatToFloat16 and Float.float16ToFloat Yields Different Result than the Interpreter
- JDK-8306763: GHA: MSVC installation is failing
- JDK-8304075: Consider removal of expiry check in VerifyCACerts.java test
- JDK-8304077: The "ZonedDateTime.parse" may not accept the "UTC+XX" zone id
- JDK-8304227: Corrupted heap dumps due to missing retries for os::write()
- JDK-8304424: Update HarfBuzz to 7.0.1
- JDK-8304887: javax/swing/JFileChooser/4847375/bug4847375.java fails with AssertionError
- JDK-8305123: javac regression: Compilation with --release 8 fails on underscore in enum identifiers
- JDK-8305537: Use default visibility for static library builds
- JDK-8305540: ArrayFill with store on backedge needs to reduce length by 1
- JDK-8305541: C2: Div/Mod nodes without zero check could be split through iv phi of loop resulting in SIGFPE
- JDK-8305542: C2: PhaseCFG::convert_NeverBranch_to_Goto must handle both orders of successors
- JDK-8305546: C2: Arraycopy intrinsic throws incorrect exception
- JDK-8305548: use-after-free related to GraphKit::clone_map
- JDK-8305549: SIGSEGV in LibraryCallKit::inline_string_copy due to constant NULL src argument
- JDK-8305550: C2: CmpU::Value must filter overflow computation against local sub computation
- JDK-8305551: C2 compiled code crashes with SIGFPE with -XX:+StressLCM and -XX:+StressGCM
- JDK-8305554: C2: java.lang.StringUTF16::indexOfChar intrinsic called with negative character argument
- JDK-8305555: C2: assert(get_ctrl(n) == cle_out) during unrolling
- JDK-8305557: Vector.lane() gets wrong value on x86
- JDK-8305558: [JVMCI] Insufficient error handling when CodeBuffer is exhausted
- JDK-8305560: C2: "Bad graph detected in build_loop_late" after a CMove is wrongly split thru phi
- JDK-8305561: DebugNonSafepoints generates incorrect information
- JDK-8305850: Fastdebug build fails after JDK-8296389
- JDK-8305851: use-def assert: special case undetected loops nested in infinite loops
- JDK-8305865: (tz) Update Timezone Data to 2023c
- JDK-8305876: Special case infinite loops with unmerged backedges in IdealLoopTree::check_safepts
- JDK-8306319: Add the runtime version in the release file of a JDK image
- JDK-8306478: On the latest macOS+XCode the Robot API may report wrong colors
- JDK-8306750: Upgrade JLine to 3.22.0
- JDK-8306751: JShell does not switch to raw mode when there is no /bin/test
- JDK-8306771: [AIX] Broken build after JDK-8301998
- JDK-8307107: updateIconImages may lead to deadlock after JDK-8276849
- JDK-8307111: Shenandoah evacuation workers may deadlock
- JDK-8307112: GHA: MSVC installation could be optional since it might already be pre-installed
- JDK-8307151: Shenandoah: Missing barriers on deoptimization path
- JDK-8307364: Make runtime/Monitor/GuaranteedAsyncDeflationIntervalTest.java more reliable
- JDK-8307372: Add TWCA Global Root CA
- JDK-8307373: Add 2 Microsoft TLS roots
- JDK-8307391: Monitor deflation might be accidentally disabled by zero intervals
- JDK-8307631: Add GTS root CAs
- JDK-8308008: java.time.Instant calculation bug in until and between methods
- JDK-8309850: ConcurrentModificationException in javadoc tool
- JDK-8301870: Include cdb in the Windows devkit
- JDK-8303906: Update jdk20u fix version to 20.0.2
- JDK-8303958: Missing Classpath exception from Continuation.c
- JDK-8304417: GCC 12 reports some compiler warnings in bundled freetype
- JDK-8304981: jcmd: ManagementAgent.status truncates the text longer than O_BUFLEN
- JDK-8305545: [JVMCI] HotSpotResolvedJavaMethodImpl.canBeInlined must respect ForceInline
- JDK-8305547: use-after-free in Node::destruct
- JDK-8305552: [JVMCI] BytecodeFrame.equals is broken
- JDK-8305553: C2: assert in PhaseIdealLoop::do_unroll() is subject to undefined behavior
- JDK-8305789: Update Commons BCEL to Version 6.7.0
- JDK-8305849: Memory leak in CompilerOracle::parse_from_line
- JDK-8305859: ProblemList runtime/CompressedOops/CompressedClassPointers.java
- JDK-8305948: Performance degradation for float/double modulo on Linux
- JDK-8306448: NoClassDefFoundError omits the original cause of an error
- JDK-8307209: Thread stacksize is reported with wrong units in os::create_thread logging
- JDK-8307360: [vectorapi] The typeChar of LaneType is incorrect when default locale is tr
- JDK-8307361: Guarantee eventual async monitor deflation
- JDK-8307380: harfbuzz build fails with GCC 7 after JDK-8301998
- JDK-8307419: UTIL_LOOKUP_PROGS fails on pathes with space
- JDK-8307420: UTIL_REQUIRE_SPECIAL warning on grep
- JDK-8307705: Support for GB18030-2022
- JDK-8308112: Allow collectors to provide specific values for GC notifications' actions
- JDK-8308390: Font.getStringBounds calculates wrong width for TextAttribute.TRACKING other than 0.0
- JDK-8308418: Socket input stream read burns CPU cycles with back-to-back poll(0) calls
- JDK-8308457: [AIX] VM crashes with UseRTMLocking on Power10
- JDK-8308693: Add missing gc+phases logging for ObjectCount(AfterGC) JFR event collection code
- JDK-8309483: PPC: Non-Top Interpreted frames should be independent of ABI_ELFv2
- JDK-8305544: UB: Compile::_phase_optimize_finished is initialized too late
- JDK-8305556: Memory leak in WB_IsMethodCompatible
- JDK-8305559: Identical branch conditions in CompileBroker::print_heapinfo
The full list of changes in 20u can be found at:
- * https://builds.shipilev.net/backports-monitor/release-notes-20.0.2.txt
- * https://builds.shipilev.net/backports-monitor/pushes-20.0.2.txt
New in release OpenJDK 20.0.1 (2023-04-18):
===========================================
* CVEs
- CVE-2023-21930
- CVE-2023-21937
- CVE-2023-21938
- CVE-2023-21939
- CVE-2023-21967
- CVE-2023-21968
* Security fixes
- JDK-8287404: Improve ping times
- JDK-8288436: Improve Xalan supports
- JDK-8294474: Better AES support
- JDK-8295304: Runtime support improvements
- JDK-8296676, JDK-8296622: Improve String platform support
- JDK-8296684: Improve String platform support
- JDK-8296692: Improve String platform support
- JDK-8296832: Improve Swing platform support
- JDK-8297371: Improve UTF8 representation redux
- JDK-8298310: Enhance TLS session negotiation
- JDK-8298667: Improved path handling
- JDK-8299129: Enhance NameService lookups
* Other changes
- JDK-8208077: File.listRoots performance degradation
- JDK-8245654: Add Certigna Root CA
- JDK-8278965: crash in SymbolTable::do_lookup
- JDK-8295951: intermittent cmp_baseline task failures with CDS files
- JDK-8299194: CustomTzIDCheckDST.java may fail at future date
- JDK-8299843: Bump version numbers for 20.0.1
- JDK-8299947: Change milestone to fcs for all releases
- JDK-8301123: Enable Symbol refcounting underflow checks in PRODUCT
- JDK-8301858: Verification error when compiling switch with record patterns
- JDK-8301876: Crash in DumpTimeClassInfo::add_verification_constraint
- JDK-8302202: Incorrect desugaring of null-allowed nested patterns
- JDK-8302879: doc/building.md update link to jtreg builds
- JDK-8303412: Update linux_x64-to-linux_aarch64 cross compilation devkit at Oracle
New in release OpenJDK 20.0.0 (2023-03-21):
===========================================
Major changes are listed below. Some changes may have been backported
to earlier releases following their first appearance in OpenJDK 20.
The full list of changes in 20u can be found at:
- * https://builds.shipilev.net/backports-monitor/release-notes-20.txt
NEW FEATURES
============
Language Features
=================
Pattern Matching for switch
===========================
https://openjdk.org/jeps/406
https://openjdk.org/jeps/420
https://openjdk.org/jeps/427
https://openjdk.org/jeps/433
Enhance the Java programming language with pattern matching for
`switch` expressions and statements, along with extensions to the
language of patterns. Extending pattern matching to `switch` allows an
expression to be tested against a number of patterns, each with a
specific action, so that complex data-oriented queries can be
expressed concisely and safely.
This is a preview feature (http://openjdk.java.net/jeps/12) introduced
in OpenJDK 17 (JEP 406), which saw a second preview in OpenJDK 18 (JEP
420) and a third in OpenJDK 19 (JEP 427). It reaches its fourth
preview (JEP 427) in OpenJDK 20.
Record Patterns
===============
https://openjdk.org/jeps/405
https://openjdk.org/jeps/432
Enhance the Java programming language with record patterns to
deconstruct record values. Record patterns and type patterns can be
nested to enable a powerful, declarative, and composable form of data
navigation and processing.
This is a preview feature (http://openjdk.java.net/jeps/12) introduced
in OpenJDK 19 (JEP 405). It reaches its second preview (JEP 432) in
OpenJDK 20.
Library Features
================
Scoped Values
=============
https://openjdk.org/jeps/429
Introduce scoped values, which enable the sharing of immutable data
within and across threads. They are preferred to thread-local
variables, especially when using large numbers of virtual threads.
This is an incubation feature (https://openjdk.java.net/jeps/11)
introduced in OpenJDK 20 (JEP 429).
Vector API
==========
https://openjdk.org/jeps/338
https://openjdk.org/jeps/414
https://openjdk.org/jeps/417
https://openjdk.org/jeps/426
https://openjdk.org/jeps/438
Introduce an API to express vector computations that reliably compile
at runtime to optimal vector hardware instructions on supported CPU
architectures and thus achieve superior performance to equivalent
scalar computations.
This is an incubation feature (https://openjdk.java.net/jeps/11)
introduced in OpenJDK 16 (JEP 338). A second round of incubation took
place in OpenJDK 17 (JEP 414), OpenJDK 18 (JEP 417) saw a third,
OpenJDK 19 a fourth (JEP 426) and OpenJDK 20 (JEP 438) sees its fifth.
Foreign Function & Memory API
=============================
https://openjdk.org/jeps/412
https://openjdk.org/jeps/419
https://openjdk.org/jeps/424
https://openjdk.org/jeps/434
Introduce an API by which Java programs can interoperate with code and
data outside of the Java runtime. By efficiently invoking foreign
functions (i.e., code outside the JVM), and by safely accessing
foreign memory (i.e., memory not managed by the JVM), the API enables
Java programs to call native libraries and process native data without
the brittleness and danger of JNI.
This API is now a preview feature (http://openjdk.java.net/jeps/12).
It was first introduced in incubation
(https://openjdk.java.net/jeps/11) in OpenJDK 17 (JEP 412), and is an
evolution of the Foreign Memory Access API (OpenJDK 14 through 16) and
Foreign Linker API (OpenJDK 16) (see release notes for
java-17-openjdk). OpenJDK 18 saw a second round of incubation (JEP
419) before its inclusion as a preview in OpenJDK 19 (JEP 424). It
reaches a second preview in OpenJDK 20 (JEP 434).
Virtual Threads
===============
https://openjdk.org/jeps/425
https://openjdk.org/jeps/436
Introduce virtual threads to the Java Platform. Virtual threads are
lightweight threads that dramatically reduce the effort of writing,
maintaining, and observing high-throughput concurrent applications.
This is a preview feature (http://openjdk.java.net/jeps/12) introduced
in OpenJDK 19 (JEP 425) and reaching its second preview in OpenJDK 20
(JEP 436).
Structured Concurrency
======================
https://openjdk.org/jeps/428
https://openjdk.org/jeps/437
Simplify multithreaded programming by introducing an API for
structured concurrency. Structured concurrency treats multiple tasks
running in different threads as a single unit of work, thereby
streamlining error handling and cancellation, improving reliability,
and enhancing observability.
This is an incubation feature (https://openjdk.java.net/jeps/11)
introduced in OpenJDK 19 (JEP 428). A second round of incubation takes
place in OpenJDK 20 (JEP 437).
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