JDK 8 sa-jdi.jar is the JAR file for JDK 8 SA (Serviceability Agent) HSDB (Hotspot Debugger) tools. It contains Java classes to support different SA HSDB tool:

sun.jvm.hotspot.CLHSDB - Supports the CL (Command Line) version of SA HSDB. 
sun.jvm.hotspot.HSDB - Supports the GUI (Graphical User Interface) version of SA HSDB. 
sun.jvm.hotspot.tools.soql.JSDB - Supports the JSDB (JavaScript Debugger).
... 

JAR File Information:

Directory of C:\fyicenter\jdk-1.8.0_191\lib
       2,415,568 sa-jdi.jar

Package Content:

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sun/jvm/hotspot/debugger/posix/elf/ELFException.class
sun/jvm/hotspot/debugger/posix/elf/ELFFile.class
sun/jvm/hotspot/debugger/posix/elf/ELFFileParser.class
sun/jvm/hotspot/debugger/posix/elf/ELFHashTable.class
sun/jvm/hotspot/debugger/posix/elf/ELFHeader.class
sun/jvm/hotspot/debugger/posix/elf/ELFProgramHeader.class
sun/jvm/hotspot/debugger/posix/elf/ELFSectionHeader.class
sun/jvm/hotspot/debugger/posix/elf/ELFStringTable.class
sun/jvm/hotspot/debugger/posix/elf/ELFSymbol.class
sun/jvm/hotspot/debugger/ppc/PPCThreadContext.class
sun/jvm/hotspot/debugger/proc/aarch64/ProcAARCH64ThreadFactory.class
sun/jvm/hotspot/debugger/proc/amd64/ProcAMD64Thread.class
sun/jvm/hotspot/debugger/proc/amd64/ProcAMD64ThreadContext.class
sun/jvm/hotspot/debugger/proc/amd64/ProcAMD64ThreadFactory.class
sun/jvm/hotspot/debugger/proc/arm/ProcARMThread.class
sun/jvm/hotspot/debugger/proc/arm/ProcARMThreadContext.class
sun/jvm/hotspot/debugger/proc/arm/ProcARMThreadFactory.class
sun/jvm/hotspot/debugger/proc/ppc/ProcPPCThread.class
sun/jvm/hotspot/debugger/proc/ppc/ProcPPCThreadContext.class
sun/jvm/hotspot/debugger/proc/ppc/ProcPPCThreadFactory.class
sun/jvm/hotspot/debugger/proc/ProcAddress.class
sun/jvm/hotspot/debugger/proc/ProcCDebugger.class
sun/jvm/hotspot/debugger/proc/ProcCFrame.class
sun/jvm/hotspot/debugger/proc/ProcDebugger.class
sun/jvm/hotspot/debugger/proc/ProcDebuggerLocal.class
sun/jvm/hotspot/debugger/proc/ProcOopHandle.class
sun/jvm/hotspot/debugger/proc/ProcThreadFactory.class
sun/jvm/hotspot/debugger/proc/SharedObject.class
sun/jvm/hotspot/debugger/proc/sparc/ProcSPARCThread.class
sun/jvm/hotspot/debugger/proc/sparc/ProcSPARCThreadContext.class
sun/jvm/hotspot/debugger/proc/sparc/ProcSPARCThreadFactory.class
sun/jvm/hotspot/debugger/proc/x86/ProcX86Thread.class
sun/jvm/hotspot/debugger/proc/x86/ProcX86ThreadContext.class
sun/jvm/hotspot/debugger/proc/x86/ProcX86ThreadFactory.class
sun/jvm/hotspot/debugger/ProcessInfo.class
sun/jvm/hotspot/debugger/RandomAccessFileDataSource.class
sun/jvm/hotspot/debugger/ReadResult.class
sun/jvm/hotspot/debugger/remote/aarch64/RemoteAARCH64ThreadFactory.class
sun/jvm/hotspot/debugger/remote/amd64/RemoteAMD64Thread.class
sun/jvm/hotspot/debugger/remote/amd64/RemoteAMD64ThreadContext.class
sun/jvm/hotspot/debugger/remote/amd64/RemoteAMD64ThreadFactory.class
sun/jvm/hotspot/debugger/remote/arm/RemoteARMThread.class
sun/jvm/hotspot/debugger/remote/arm/RemoteARMThreadContext.class
sun/jvm/hotspot/debugger/remote/arm/RemoteARMThreadFactory.class
sun/jvm/hotspot/debugger/remote/ppc/RemotePPCThread.class
sun/jvm/hotspot/debugger/remote/ppc/RemotePPCThreadContext.class
sun/jvm/hotspot/debugger/remote/ppc/RemotePPCThreadFactory.class
sun/jvm/hotspot/debugger/remote/RemoteAddress.class
sun/jvm/hotspot/debugger/remote/RemoteDebugger.class
sun/jvm/hotspot/debugger/remote/RemoteDebuggerClient.class
sun/jvm/hotspot/debugger/remote/RemoteDebuggerServer.class
sun/jvm/hotspot/debugger/remote/RemoteDebuggerServer_Stub.class
sun/jvm/hotspot/debugger/remote/RemoteOopHandle.class
sun/jvm/hotspot/debugger/remote/RemoteThread.class
sun/jvm/hotspot/debugger/remote/RemoteThreadFactory.class
sun/jvm/hotspot/debugger/remote/sparc/RemoteSPARCThread.class
sun/jvm/hotspot/debugger/remote/sparc/RemoteSPARCThreadContext.class
sun/jvm/hotspot/debugger/remote/sparc/RemoteSPARCThreadFactory.class
sun/jvm/hotspot/debugger/remote/x86/RemoteX86Thread.class
sun/jvm/hotspot/debugger/remote/x86/RemoteX86ThreadContext.class
sun/jvm/hotspot/debugger/remote/x86/RemoteX86ThreadFactory.class
sun/jvm/hotspot/debugger/sparc/SPARCThreadContext.class
sun/jvm/hotspot/debugger/SymbolLookup.class
sun/jvm/hotspot/debugger/ThreadAccess.class
sun/jvm/hotspot/debugger/ThreadContext.class
sun/jvm/hotspot/debugger/ThreadProxy.class
sun/jvm/hotspot/debugger/UnalignedAddressException.class
sun/jvm/hotspot/debugger/UnmappedAddressException.class
sun/jvm/hotspot/debugger/win32/coff/AuxBfEfRecord.class
sun/jvm/hotspot/debugger/win32/coff/AuxFileRecord.class
sun/jvm/hotspot/debugger/win32/coff/AuxFunctionDefinitionRecord.class
sun/jvm/hotspot/debugger/win32/coff/AuxSectionDefinitionsRecord.class
sun/jvm/hotspot/debugger/win32/coff/AuxSymbolRecord.class
sun/jvm/hotspot/debugger/win32/coff/AuxWeakExternalRecord.class
sun/jvm/hotspot/debugger/win32/coff/Characteristics.class
sun/jvm/hotspot/debugger/win32/coff/COFFException.class
sun/jvm/hotspot/debugger/win32/coff/COFFFile.class
sun/jvm/hotspot/debugger/win32/coff/COFFFileParser.class
sun/jvm/hotspot/debugger/win32/coff/COFFHeader.class
sun/jvm/hotspot/debugger/win32/coff/COFFLineNumber.class
sun/jvm/hotspot/debugger/win32/coff/COFFRelocation.class
sun/jvm/hotspot/debugger/win32/coff/COFFSymbol.class
sun/jvm/hotspot/debugger/win32/coff/COFFSymbolConstants.class
sun/jvm/hotspot/debugger/win32/coff/COMDATSelectionTypes.class
sun/jvm/hotspot/debugger/win32/coff/DataDirectory.class
sun/jvm/hotspot/debugger/win32/coff/DebugDirectory.class
sun/jvm/hotspot/debugger/win32/coff/DebugDirectoryEntry.class
sun/jvm/hotspot/debugger/win32/coff/DebugTypes.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50MemberAttributes.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50ReservedTypes.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SegDesc.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SegDescEnums.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SegInfo.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SrcModFileDesc.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SrcModLineNumberMap.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSAlignSym.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSFileIndex.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSGlobalPub.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSGlobalSym.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSGlobalTypes.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSLibraries.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSModule.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSMPC.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSOffsetMap16.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSOffsetMap32.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSPreComp.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSPublic.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSPublicSym.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSSegMap.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSSegName.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSSrcLnSeg.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSSrcModule.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSStaticSym.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSSymbolBase.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSSymbols.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SSTypes.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50Subsection.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SubsectionDirectory.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SubsectionTypes.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SymbolEnums.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SymbolIterator.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50SymbolTypes.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50TypeEnums.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50TypeIterator.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50TypeLeafIndices.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50WrongNumericTypeException.class
sun/jvm/hotspot/debugger/win32/coff/DebugVC50X86RegisterEnums.class
sun/jvm/hotspot/debugger/win32/coff/DLLCharacteristics.class
sun/jvm/hotspot/debugger/win32/coff/DumpExports.class
sun/jvm/hotspot/debugger/win32/coff/ExportDirectoryTable.class
sun/jvm/hotspot/debugger/win32/coff/MachineTypes.class
sun/jvm/hotspot/debugger/win32/coff/OptionalHeader.class
sun/jvm/hotspot/debugger/win32/coff/OptionalHeaderDataDirectories.class
sun/jvm/hotspot/debugger/win32/coff/OptionalHeaderStandardFields.class
sun/jvm/hotspot/debugger/win32/coff/OptionalHeaderWindowsSpecificFields.class
sun/jvm/hotspot/debugger/win32/coff/SectionFlags.class
sun/jvm/hotspot/debugger/win32/coff/SectionHeader.class
sun/jvm/hotspot/debugger/win32/coff/TestDebugInfo.class
sun/jvm/hotspot/debugger/win32/coff/TestParser.class
sun/jvm/hotspot/debugger/win32/coff/TypeIndicators.class
sun/jvm/hotspot/debugger/win32/coff/WindowsNTSubsystem.class
sun/jvm/hotspot/debugger/windbg/AddressDataSource.class
sun/jvm/hotspot/debugger/windbg/amd64/WindbgAMD64Thread.class
sun/jvm/hotspot/debugger/windbg/amd64/WindbgAMD64ThreadContext.class
sun/jvm/hotspot/debugger/windbg/amd64/WindbgAMD64ThreadFactory.class
sun/jvm/hotspot/debugger/windbg/DLL.class
sun/jvm/hotspot/debugger/windbg/ia64/WindbgIA64Thread.class
sun/jvm/hotspot/debugger/windbg/ia64/WindbgIA64ThreadContext.class
sun/jvm/hotspot/debugger/windbg/ia64/WindbgIA64ThreadFactory.class
sun/jvm/hotspot/debugger/windbg/WindbgAddress.class
sun/jvm/hotspot/debugger/windbg/WindbgCDebugger.class
sun/jvm/hotspot/debugger/windbg/WindbgCDebugInfoBuilder.class
sun/jvm/hotspot/debugger/windbg/WindbgDebugger.class
sun/jvm/hotspot/debugger/windbg/WindbgDebuggerLocal.class
sun/jvm/hotspot/debugger/windbg/WindbgOopHandle.class
sun/jvm/hotspot/debugger/windbg/WindbgThreadFactory.class
sun/jvm/hotspot/debugger/windbg/x86/WindbgX86Thread.class
sun/jvm/hotspot/debugger/windbg/x86/WindbgX86ThreadContext.class
sun/jvm/hotspot/debugger/windbg/x86/WindbgX86ThreadFactory.class
sun/jvm/hotspot/debugger/windows/amd64/WindowsAMD64CFrame.class
sun/jvm/hotspot/debugger/windows/x86/WindowsX86CFrame.class
sun/jvm/hotspot/debugger/x86/X86ThreadContext.class
sun/jvm/hotspot/DebugServer.class
sun/jvm/hotspot/gc_implementation/g1/G1Allocator.class
sun/jvm/hotspot/gc_implementation/g1/G1CollectedHeap.class
sun/jvm/hotspot/gc_implementation/g1/G1HeapRegionTable.class
sun/jvm/hotspot/gc_implementation/g1/G1MonitoringSupport.class
sun/jvm/hotspot/gc_implementation/g1/HeapRegion.class
sun/jvm/hotspot/gc_implementation/g1/HeapRegionManager.class
sun/jvm/hotspot/gc_implementation/g1/HeapRegionSetBase.class
sun/jvm/hotspot/gc_implementation/g1/HeapRegionSetCount.class
sun/jvm/hotspot/gc_implementation/parallelScavenge/ParallelScavengeHeap.class
sun/jvm/hotspot/gc_implementation/parallelScavenge/PSOldGen.class
sun/jvm/hotspot/gc_implementation/parallelScavenge/PSYoungGen.class
sun/jvm/hotspot/gc_implementation/shared/ImmutableSpace.class
sun/jvm/hotspot/gc_implementation/shared/MutableSpace.class
sun/jvm/hotspot/gc_interface/CollectedHeap.class
sun/jvm/hotspot/gc_interface/CollectedHeapName.class
sun/jvm/hotspot/gc_interface/G1YCType.class
sun/jvm/hotspot/gc_interface/GCCause.class
sun/jvm/hotspot/gc_interface/GCName.class
sun/jvm/hotspot/gc_interface/GCWhen.class
sun/jvm/hotspot/gc_interface/ReferenceType.class
sun/jvm/hotspot/HelloWorld.class
sun/jvm/hotspot/HotSpotAgent.class
sun/jvm/hotspot/HotSpotSolarisVtblAccess.class
sun/jvm/hotspot/HotSpotTypeDataBase.class
sun/jvm/hotspot/HSDB.class
sun/jvm/hotspot/interpreter/Bytecode.class
sun/jvm/hotspot/interpreter/BytecodeANewArray.class
sun/jvm/hotspot/interpreter/BytecodeBipush.class
sun/jvm/hotspot/interpreter/BytecodeCheckCast.class
sun/jvm/hotspot/interpreter/BytecodeDisassembler.class
sun/jvm/hotspot/interpreter/BytecodeGetField.class
sun/jvm/hotspot/interpreter/BytecodeGetPut.class
sun/jvm/hotspot/interpreter/BytecodeGetStatic.class
sun/jvm/hotspot/interpreter/BytecodeGoto.class
sun/jvm/hotspot/interpreter/BytecodeGotoW.class
sun/jvm/hotspot/interpreter/BytecodeIf.class
sun/jvm/hotspot/interpreter/BytecodeIinc.class
sun/jvm/hotspot/interpreter/BytecodeInstanceOf.class
sun/jvm/hotspot/interpreter/BytecodeInvoke.class
sun/jvm/hotspot/interpreter/BytecodeJmp.class
sun/jvm/hotspot/interpreter/BytecodeJsr.class
sun/jvm/hotspot/interpreter/BytecodeJsrW.class
sun/jvm/hotspot/interpreter/BytecodeLoad.class
sun/jvm/hotspot/interpreter/BytecodeLoadConstant.class
sun/jvm/hotspot/interpreter/BytecodeLoadStore.class
sun/jvm/hotspot/interpreter/BytecodeLookupswitch.class
sun/jvm/hotspot/interpreter/BytecodeMultiANewArray.class
sun/jvm/hotspot/interpreter/BytecodeNew.class
sun/jvm/hotspot/interpreter/BytecodeNewArray.class
sun/jvm/hotspot/interpreter/BytecodePutField.class
sun/jvm/hotspot/interpreter/BytecodePutStatic.class
sun/jvm/hotspot/interpreter/BytecodeRet.class
sun/jvm/hotspot/interpreter/Bytecodes.class
sun/jvm/hotspot/interpreter/BytecodeSipush.class
sun/jvm/hotspot/interpreter/BytecodeStore.class
sun/jvm/hotspot/interpreter/BytecodeStream.class
sun/jvm/hotspot/interpreter/BytecodeTableswitch.class
sun/jvm/hotspot/interpreter/BytecodeVisitor.class
sun/jvm/hotspot/interpreter/BytecodeWideable.class
sun/jvm/hotspot/interpreter/BytecodeWithCPIndex.class
sun/jvm/hotspot/interpreter/BytecodeWithKlass.class
sun/jvm/hotspot/interpreter/Interpreter.class
sun/jvm/hotspot/interpreter/InterpreterCodelet.class
sun/jvm/hotspot/interpreter/LookupswitchPair.class
sun/jvm/hotspot/interpreter/MaskFillerForNative.class
sun/jvm/hotspot/interpreter/OffsetClosure.class
sun/jvm/hotspot/interpreter/OopMapCacheEntry.class
sun/jvm/hotspot/interpreter/OopMapForCacheEntry.class
sun/jvm/hotspot/jdi/ArrayReferenceImpl.class
sun/jvm/hotspot/jdi/ArrayTypeImpl.class
sun/jvm/hotspot/jdi/BaseLineInfo.class
sun/jvm/hotspot/jdi/BooleanTypeImpl.class
sun/jvm/hotspot/jdi/BooleanValueImpl.class
sun/jvm/hotspot/jdi/ByteTypeImpl.class
sun/jvm/hotspot/jdi/ByteValueImpl.class
sun/jvm/hotspot/jdi/CharTypeImpl.class
sun/jvm/hotspot/jdi/CharValueImpl.class
sun/jvm/hotspot/jdi/ClassLoaderReferenceImpl.class
sun/jvm/hotspot/jdi/ClassObjectReferenceImpl.class
sun/jvm/hotspot/jdi/ClassTypeImpl.class
sun/jvm/hotspot/jdi/ConcreteMethodImpl.class
sun/jvm/hotspot/jdi/ConnectorImpl.class
sun/jvm/hotspot/jdi/DoubleTypeImpl.class
sun/jvm/hotspot/jdi/DoubleValueImpl.class
sun/jvm/hotspot/jdi/FieldImpl.class
sun/jvm/hotspot/jdi/FloatTypeImpl.class
sun/jvm/hotspot/jdi/FloatValueImpl.class
sun/jvm/hotspot/jdi/IntegerTypeImpl.class
sun/jvm/hotspot/jdi/IntegerValueImpl.class
sun/jvm/hotspot/jdi/InterfaceTypeImpl.class
sun/jvm/hotspot/jdi/JNITypeParser.class
sun/jvm/hotspot/jdi/JVMTIThreadState.class
sun/jvm/hotspot/jdi/LineInfo.class
sun/jvm/hotspot/jdi/LocalVariableImpl.class
sun/jvm/hotspot/jdi/LocationImpl.class
sun/jvm/hotspot/jdi/LongTypeImpl.class
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⇒ JDK 8 tools.jar - JDK Tools

⇐ JDK 8 packager.jar - Packager Tool

⇑ Download and Use JDK 8

⇑⇑ FAQ for JDK (Java Development Kit)