International Business Machines Corporation

Edward J Slattery

Matthew Alexander Webster

Samuel David Borman

Richard Kenneth McGuire

Anthony Howard Phillips

Margaret Ann Ruth Beynon

Hannah J Deakin

Sara L Mitchell

Andrew H Murphy

Methods, computer program products, and systems for managing memory in a computer system in which memory locations in use at any given time are represented as a set of memory objects in a first object graph. The first object graph includes a system root object associated by references to each of the memory objects. A method includes creating a second root object for the memory to form a second object graph for the memory. The method also includes, in response to the dereferencing of a first object from the first object graph, associating the dereferenced first object with the second object graph so that the second object graph includes at least one dereferenced object.

Managing memory in a computer system

Methods, computer program products, and systems for managing memory in a computer system in which memory locations in use at any given time are represented as a set of memory objects in a first object graph. The first object graph includes a system root object associated by references to each of the memory objects. A method includes creating a second root object for the memory so as to form a second object graph for the memory. The method also includes, in response to the dereferencing of a first object from the first object graph, associating the dereferenced first object with the second object graph so that the second object graph includes at least one dereferenced object.

A method provides a debug service in a network environment. One or more processors initiate a debug service as a remote shared service in the network environment. The debug service receives a call from a deployed workload process within a virtual machine in the network environment, and gathers required information for a debug session of the workload process, where the required information includes source code used by the workload process. One or more processors attach the debug service to the workload process to carry out the debug session, such that the debug service working with a debug agent at the workload process attaches to and debugs a virtual environment that obscures the virtual machine.

Remote debug service in a cloud environment

A system and associated method for changing the initial size of a variable where intermediate code contains a static method class which in turn contains the initial size of variable. Comparing a statistic with the initial size of the variable, the statistic being derived from all current instances of the variable contained in located in dynamic memory, the comparing being performed in response to an event having occurred. Then modifying the initial size of the variable located in the intermediate code. The modification being in such a way as to change the initial size of variable in dependence of the statistic and all current instances of the variable located in the dynamic memory. Finally, repeating the comparing and changing steps for all variables contained in the dynamic memory.

System and method for changing variables at runtime

A system and associated method for directing to recompile a class with a static variable of the class in a Java platform are disclosed. The class is defined with at least two implementations that are selectively compiled and executed a value of the static variable. The value of the static variable of the class is modified to a new value depending on characteristics of a runtime environment in which the method is executed. The class is recompiled and the new value is set for the static variable of the class. A debugger performs a hot code replacement of the class with the recompiled class.

Recompilation of a class with a java static variable

A computer system is used to run one or more programs. It includes a memory having at least a first heap and a second heap in which objects are stored, with a first object being stored on the first heap. A write barrier is provided for detecting that said the first object has been updated by a program to include a first reference to a memory location in the second heap.

Computer system for detecting object updates

The present invention discloses a method for allowing an email request to be sent to a group of recipients which requires one person to accept the request or task. Obtaining notification of the acceptance and completion status of the task is accomplished solely through exchanged emails, without the use of standalone tracking or modification to the underlying email system functionality. One responder emails are sent to a group of recipients, and when an accepting recipient accepts the request, the sender and non-accepting recipients are notified via email that the request has been accepted. Similarly, emails can be sent to the sender and non-accepting recipients that the request has been completed.

One-responder email feature

A method to generate best matching search keywords is disclosed. After running an Internet search engine, a user selects links. From the links, common keywords are extracted and sorted based on the number of times that the common keywords appears in the contents of the links. The search engine runs searches based on a few of top ranked keywords, generates best matching search keywords, and provides the selected links as well as more links that relates to the best matching search keywords.

System and method to customize search engine results by picking documents

A system is provided which comprises multiple Java virtual machines (VMs). Each VM is capable of running a plurality of threads. The system includes at least one object which is shared between the VMs so that it is accessible from two or more VMs, and at least one non-shared object which is accessible only from a single VM. In order to perform a lock operation on a shared object, it is first detecting that an object is a shared object. In a preferred embodiment, this is accomplished by locating a predefined value in a particular lock data word in the object. In response to the detection, a monitor is used to control local access to the shared object for the thread that is requesting the object. The monitor is on the same VM as the requesting thread. In addition, a data structure, which may be a proxy object, is updated in order to associate the monitor with the shared object.

Object locking in a shared VM environment

A computer system includes multiple class loaders for loading program class files into the system. A constraint checking mechanism is provided wherein a first class file loaded by a first class loader makes a symbolic reference to a second class file loaded by a second class loader, the symbolic reference including a descriptor of a third class file. The constraint mechanism requires that the first and second class files agree on the identity of the third class file and stores a list of constraints as a set of asymmetric relationships between class loaders. Each stored constraint, for a class loader which loaded a class file that contains a symbolic reference to another class file, includes a first parameter denoting the class loader which loaded the class file to which the symbolic references is made; and a second parameter denoting a class file which is identified by a descriptor in said symbolic reference.

Growing community of inventors

Chanders Ford, United Kingdom

Edward J Slattery