v0.26.0

Added

• calculate clap styles at compile time instead of runtime
• add startup tracing
• add Java 25 support
• add java/lang/invoke/MemberName.vmindex
• optimize logging startup
• implement invokedynamic call site cache
• implement java/lang/Class.isRecord0()Z
• add member handles
• reduce memory allocations during primordial thread creation

Fixed

• correct java.lang.Object.clone()
• correct class name generation for anewarray instruction
• never deep clone java.lang.Class objects
• use private java.lang.Class constructor to create a Class object
• update frame exception handling to create throwable using the current thread instead of the primordial thread
• correct polymorphic calls to java.lang.invoke Holder inner classes
• correct JVM initialization process to call java.lang.ref.Reference.<clinit>()

Other

• update CallSiteCache to use a DashMap instead of RwLock
• [breaking] switch to OsStr/OsString and classpath handling
• correct lint errors
• remove superfluous Class arc usage
• reduce memory allocations and locks when registering primitives with the boot class loader
• replace Reference std::sync::RwLock with parking_lot::RwLock
• update Cargo.toml dependencies
• define MemberNameFlags::REFERENCE_KIND_MASK using MemberNameFlags::REFERENCE_KIND_SHIFT
• update start tracing sum logic
• correct lint errors
• update compatibility tests

v0.25.0

Added

• add parallel jit compiler
• update GC threads to be configurable; default to 50% of cpu cores

Fixed

• correct default interface method resolution
• correct instanceof operations
• address stack overflow in invokedynamic instruction
• correct definition of the ristretto/internal/access/JavaLangRefAccess class

Other

• replace Value TryInto with as_<type>
• replace Value.to_<type> methods with TryInto
• remove ConcurrentVec
• update Cargo.toml dependencies
• refactor Reference and Object to improve memory and lock utilization
• replace Reference TryInto<type> with as_<type>
• replace Object TryInto<type> with as_<type>
• implement value, reference and object hash
• refactor usages of Reference to Value
• correct clippy lint warnings
• remove debugging code
• update to cranelift=0.122.0, criterion=0.7.0

v0.24.0

Added

• add background jit compiler
• improve class loader reflection; initial class loader and module support
• implement java/lang/reflect/Array
• implement java/lang/String.intern()Ljava/lang/String;
• add initial string pool

Fixed

• update cli to allow -cp argument for classpath
• do not deep clone java.lang.Class objects
• unbox primitives for constructor reflection
• correct class loading hierarchy logic
• correct java/lang/Class.getRawAnnotations()[B and java/lang/Class.getRawTypeAnnotations()[B to return zero length in byte array when there are no annotations
• correct private method invocation
• reduce gc memory utilization
• add Unsafe support for getting/setting Class static fields
• update java/lang/invoke/MethodHandleNatives.staticFieldOffset(Ljava/lang/invoke/MemberName;)J to get the correct class name
• update java/lang/Class.forName0 to throw ClassNotFoundException for primitive types
• correct multinewarray instruction
• correct jdk.internal.misc.Unsafe put methods
• correct inherited static method invocation
• correct java/lang/System.arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

Other

• introduce -X cli arguments and move --int to -Xint
• stub java/lang/invoke/DelegatingMethodHandle$Holder.reinvoke_L([Ljava/lang/Object;)Ljava/lang/Object;
• stub java/lang/invoke/DelegatingMethodHandle$Holder.delegate([Ljava/lang/Object;)Ljava/lang/Object;
• stub java/lang/invoke/Invokers$Holder.invoker([Ljava/lang/Object;)Ljava/lang/Object;
• stub java/lang/invoke/DirectMethodHandle$Holder.getReference([Ljava/lang/Object;)Ljava/lang/Object;
• consolidate array class creation
• upgrade default java version to 21.0.8.9.1
• move primitive and array class creation into class loader
• remove use of custom garbage collector box
• update jit and main readme
• add timing to compatibility tests
• add method and string integration tests

v0.23.0

Added

• add garbage collector
• implement jdk/internal/loader/BootLoader.getSystemPackageLocation(Ljava/lang/String;)Ljava/lang/String; and jdk/internal/loader/BootLoader.getSystemPackageNames()[Ljava/lang/String;
• add parallel garbage collection
• add jit lookupswitch
• add jit tableswitch

Fixed

• improve unsafe support for byte offsets

Other

• update Cargo.toml dependencies
• remove unnecessary test classes
• improve compatibility test messages

v0.22.0

Added

• add Eq trait to class file attributes
• implement java/lang/invoke/MethodHandle.invoke([Ljava/lang/Object;)Ljava/lang/Object;, java/lang/invoke/MethodHandle.invokeBasic([Ljava/lang/Object;)Ljava/lang/Object;, java/lang/invoke/MethodHandle.invokeExact([Ljava/lang/Object;)Ljava/lang/Object;
• implement jdk/internal/misc/Unsafe.park(ZJ)V and jdk/internal/misc/Unsafe.unpark(Ljava/lang/Object;)V
• implement java/lang/ref/Reference.getAndClearReferencePendingList()Ljava/lang/ref/Reference;
• implement java/lang/ref/Reference.hasReferencePendingList()Z and java/lang/ref/Reference.waitForReferencePendingList()V
• implement java/lang/Thread.start0()V
• implement jdk/internal/vm/ContinuationSupport.isSupported0()Z
• implement java/lang/Thread.setPriority0(I)V
• implement java.lang.Thread resume, suspend and stop methods to return UnsupportedOperationException
• implement java/lang/Thread.clearInterruptEvent()V, java/lang/Thread.interrupt0()V, java/lang/Thread.isInterrupted(Z)Z
• implement java/lang/Thread.getThreads()[Ljava/lang/Thread;
• implement java/lang/Thread.ensureMaterializedForStackWalk(Ljava/lang/Object;)V
• implement jdk/internal/reflect/Reflection.areNestMates(Ljava/lang/Class;Ljava/lang/Class;)Z
• implement jdk/internal/misc/Unsafe.staticFieldBase0(Ljava/lang/reflect/Field;)Ljava/lang/Object;, jdk/internal/misc/Unsafe.staticFieldOffset0(Ljava/lang/reflect/Field;)J, sun/misc/Unsafe.staticFieldBase(Ljava/lang/reflect/Field;)Ljava/lang/Object;, sun/misc/Unsafe.staticFieldOffset(Ljava/lang/reflect/Field;)J
• implement jdk/internal/misc/Unsafe.pageSize()I and sun/misc/Unsafe.pageSize()I

Fixed

• correct java/lang/Object.hashCode()I
• correct if_icmpeq and if_icmpne instructions
• correct field shadowing logic
• correct and optimize class polymorphic method lookups
• correct java/lang/invoke/MethodHandleNatives resolve access check logic
• correct field resolution logic in java/lang/invoke/MethodHandleNatives.resolve()
• correct integer/long div/rem instructions when dividing by zero
• correct double/float div/rem instructions when dividing by zero
• correct jdk/internal/misc/Unsafe.get(...) methods to handle partial byte buffers
• correct array index out of bounds behavior
• add class, method type and method handle support to invokedynamic static bootstrap argument resolution
• correct class retrieval for java/lang/invoke/MethodHandleNatives.objectFieldOffset(Ljava/lang/invoke/MemberName;)J
• define empty configuration for jdk/internal/module/ModuleBootstrap.boot()Ljava/lang/ModuleLayer;
• use thread execute for internal vm calls
• lookup classes using existing thread context instead of vm

Other

• update Cargo.toml dependencies
• [breaking] optimize Instruction enum by introducing TableSwitch and LookupSwitch structs
• reduced direct usages of Reference
• remove fields from object instances
• [breaking] refactor class and object fields
• add eq trait to value and reference
• [breaking] refactor VM invoke interfaces to combine method name and method descriptor argument into a single method signature argument
• update compatibility tests to run in parallel
• update to Rust 1.88.0
• update JavaObject.to_object(&VM) -> JavaObject.to_object(&Thread)
• refactored file handle management and created thread handles

v0.21.0

Added

• add java.io.ObjectInputStream and java.io.ObjectOutputStream intrinsics
• add intrinsic support for basic file io
• add java/lang/ref/PhantomReference intrinsics
• add OS specific file intrinsics
• implemented java.io.ObjectStreamClass.hasStaticInitializer(Ljava/lang/Class;)Z

Fixed

• correct mutf-8 class file string encoding/decoding as well as add utf-16 Java 9+ string support
• add invokedynamic bootstrap method descriptor verification

Other

• [breaking] change VM parameter types from Vec to &[T] for zero-allocation and improved ergonomics
• optimize Reference enum memory
• [breaking] update ConstantPool try_get_utf8, try_get_class, try_get_string, try_get_module, and try_get_package to return &str instead of &String. Updated Class to use the same class name reference from constant pool instead of copying the string into the struct.
• create compile time intrinsic method registry
• add classfile attributes documentation
• update rust doc formatting
• add constants for java versions
• optimize file reads by removing iterative type conversion from u8->i8. Optimized Reference Vec signed<->unsigned type conversions.
• add java.lang.invoke.DirectMethodHandle$Holder trampoline methods on class definition
• remove unnecessary version file parsing on startup when the full java version is specified
• remove unnecessary call to obtain current directory on initialization
• update to phf=0.12.1
• remove lint warning on windows
• remove unnecessary java version from intrinsics registry
• correct clippy lints

v0.20.0

Added

• add jit support for ret and ret_w

Fixed

• [breaking] update MaxLocals to correctly handle static/virtual methods and category 2 (long/double) types
• update Version.supports() to take a reference to self
• correct stack overflow error in java/lang/invoke/MethodHandleNatives.resolve(Ljava/lang/invoke/MemberName;Ljava/lang/Class;)Ljava/lang/invoke/MemberName;
• corrected jit bug where float was being treated as a double in ldc and ldc_w instructions

Other

• update Cargo.toml dependencies
• improve attribute code coverage
• improve classfile documentation
• stub support for polymorphic intrinsic methods
• add jit ldc, ldc_w, and ldc2_w error tests
• improve jit ret_w code coverage
• stub java.lang.invoke.DirectMethodHandle$Holder
• rename native_methods module to intrinsic_methods

v0.19.2

Fixed

• java/lang/Class.getDeclaredMethods0(Z)[Ljava/lang/reflect/Method; set void return types to void class instead of null
• correct invokedynamic get_method_type to handle descriptors without parameters
• correct jit jsr and jsr_w instructions

Other

• add jit pop2 category2 test
• add jit stack tests
• add jit test coverage for dcmpg, dcmpl, fcmpg, fcmpl, lcmp
• update Cargo.toml dependencies

v0.19.1

Added

• add java.lang.invoke.MethodHandleNatives objectFieldOffset(..), staticFieldBase(..) and staticFieldOffset(..)
• add java.lang.invoke.MethodHandleNatives setCallSiteTargetNormal(..) and setCallSiteTargetVolatile(..)

Fixed

• update jit dcmpg, dcmpl, fcmpg, fcmpl to correctly handle NaN
• correct java.lang.invoke.MethodHandleNatives.resolve(..) field support
• correct jit dreturn and freturn

Other

• add jit double math tests
• add jit long math tests
• add jit float math tests
• add jit integer math tests
• add jit debug, monitor, and nop tests
• add jit convert instruction tests
• add jit bipush and sipush instruction tests
• add jit primitive load and store instruction tests
• update to cranelift=0.120.0
• update cfg doc formatting
• add jit test coverage
• update Cargo.lock dependencies
• update Cargo.toml dependencies
• update default java version to 21.0.7.6.1
• update to cranelift=0.120.0
• stub invokedynamic caller method handle lookup
• stub invokedynamic static bootstrap arguments
• expand invokedynamic stub by obtaining MethodType parameter for bootstrap method
• stub invokedynamic bootstrap method lookup

v0.19.0

Added

• implement basic jit branch instructions
• enable creation of jit control flow graph blocks
• generate jit control flow graph using cranelift blocks
• optimize operand stack layout
• optimize jit Instruction::Return
• optimize operand stack to prevent allocation when not used; e.g. Object.<init>()
• implement jit operand stack

Fixed

• add jit cfg exception blocks
• add jit block support for ifnull and ifnonnull
• add jit control flow logic for if_acmpeq and if_acmpne
• correct lcmp, dcmpl, dcmpg, fcmpl, fcmpg to pass stack values through block params
• correct jit dcmpl, dcmpg, fcmpl, fcmpg to emit float instructions instead of int.
• correct jit invoke* instruction parameter processing
• correct jit field, invoke and stack simulation errors

Other

• minor jit readme update
• simplify jit stack implementations
• update to Rust 1.87.0
• improve jit instruction simulation test coverage
• refactor to use block params for OperandStack
• update jit operand stack to use cranelift stack slot
• only enable jit verifier when debug assertions are enabled
• update to clap=4.5.38, os_info=3.11.0, sysinfo=0.35.1, tempfile=3.20.0