Abstract: A visible light communication (VLC) optical receiver (100) is provided, the receiver (100) includes a photodetector; and a modified Fresnel lens (103), characterised in that the lens (103) is curved into a convex shape such that multiple focal points (110) are created when light from a light source is diffracted through the lens (103) allowing the light signal to be received by the photodetector at the different positions of the photodetector corresponding to said focal points.

Abstract: In an embodiment, a current internal corrosion level at a current time is read from an internal corrosion sensor that is internal to a computer. An internal corrosion difference is calculated between the current internal corrosion level and a previous internal corrosion level. Upon determining that the internal corrosion difference is more than a first threshold amount, a first action is performed that decreases an internal temperature of the computer. In a further embodiment, upon determining that the internal corrosion difference is less than a second threshold amount, a second action is performed that allows the internal temperature of the computer to increase.

Abstract: In an embodiment, a current internal corrosion level at a current time is read from an internal corrosion sensor that is internal to a computer. An internal corrosion difference is calculated between the current internal corrosion level and a previous internal corrosion level. Upon determining that the internal corrosion difference is more than a first threshold amount, a first action is performed that decreases an internal temperature of the computer. In a further embodiment, upon determining that the internal corrosion difference is less than a second threshold amount, a second action is performed that allows the internal temperature of the computer to increase.

Abstract: In an embodiment, a current internal corrosion level at a current time is read from an internal corrosion sensor that is internal to a computer. An internal corrosion difference is calculated between the current internal corrosion level and a previous internal corrosion level. If the internal corrosion difference is more than a first threshold amount, a first action is performed that decreases an internal temperature of the computer.

Abstract: Methods, apparatuses, and computer program products for analyzing concurrent debugging sessions are provided. Embodiments include a first debugger initiating a conditional breakpoint in a first debug session of a first application. The conditional breakpoint stops execution of the first application based on a condition of a value of a variable of a second application. Embodiments also include the first debugger requesting and receiving the value of the variable from a second debugger. Embodiments also include the first debugger evaluating the condition of the conditional breakpoint based on the received value of the variable.

Abstract: Methods, apparatuses, and computer program products for analyzing concurrent debugging sessions are provided. Embodiments include a first debugger initiating a conditional breakpoint in a first debug session of a first application. The conditional breakpoint stops execution of the first application based on a condition of a value of a variable of a second application. Embodiments also include the first debugger requesting and receiving the value of the variable from a second debugger. Embodiments also include the first debugger evaluating the condition of the conditional breakpoint based on the received value of the variable.

Abstract: Crash notification between debuggers, including: initiating, by a first debugger, a first debug session of a first application; detecting, by the first debugger, an error condition in the first application; determining, by the first debugger, whether any variables utilized by the first application are related to variables utilized by a second application, wherein the second application is being debugged in a second debug session by a second debugger; and communicating, by the first debugger to a second debugger, information associated with the error condition in the first application.

Abstract: In an embodiment, in response to detecting a request by a program to access a network, if the request is the first time that the program requests to access the network, a subset of instructions is replaced in the program with supervisor call instructions. The supervisor call instructions cause respective interrupts of execution of the program. In response to each of the respective interrupts of execution of the program, the supervisor call instructions that caused the respective interrupts are replaced with the respective swapped instructions, and if a number of the respective interrupts of execution exceed a trap threshold, all remaining of the respective swapped instructions are stored to the program.

Abstract: Crash notification between debuggers, including: initiating, by a first debugger, a first debug session of a first application; detecting, by the first debugger, an error condition in the first application; determining, by the first debugger, whether any variables utilized by the first application are related to variables utilized by a second application, wherein the second application is being debugged in a second debug session by a second debugger; and communicating, by the first debugger to a second debugger, information associated with the error condition in the first application.

Abstract: In an embodiment, in response to reading a declaration of a function that specifies a name of the function and a type of memory on which the function operates, the name of the function, a pointer to the function, and the type are saved to a template. In response to reading a call statement that specifies the name of the function and an identifier of an object, first code is generated. The first code, when executed, reads the pointer to the function from a virtual function table pointed to by the object, finds an entry in the virtual function table that represents the function, and reads the pointer from the entry in the virtual function table. The call statement, when executed, requests a call of the function. Second code is generated that, when executed, calls the function using the pointer read from the virtual function table.

Abstract: Compiling source code includes receiving, by an optimizing compiler from a debugger, a variable value modification profile that specifies locations in the source code at which variable values modified during a debug session; compiling the source code, including: inserting snapshots at one or more of the locations in the source code at which variable values were modified, each snapshot including a breakpoint; and only for each snapshot at a location in the source code at which variable values were modified: inserting, between the breakpoint and remaining source code at the location of the snapshot, a module of computer program instructions that when executed retrieves a current value of a variable and stores the current value in a register; and recording the location of each inserted snapshot; and providing, to the debugger by the optimizing compiler, the recorded locations of each inserted snapshot along with the compiled source code.

Abstract: In an embodiment, a first execution path in a program is determined that has been executed a largest number of times, as compared to at least one other path in the program. Swapped instructions are replaced in the program with breakpoints, wherein the swapped instructions are not on the first execution path. The breakpoints that are not on the first execution path and that are contiguous to each other are replaced in the program with a control word.

Abstract: Debugging source code includes: tracking, by a debugger during a debug session, duration of user examination of source code locations; providing, by the debugger to an optimizing compiler, a source code examination profile specifying source code locations examined by the user during the debug session; and receiving, by the debugger from the optimizing compiler: compiled source code for debugging, the compiled source code comprising, at each of one or more source code locations specified in the source code examination profile: a snapshot before the source code of the source code location, followed by an expanded snapshot, the expanded snapshot including computer program instructions to enable, during a debug session, examination of variable values changing during execution of the source code at the source code location; and a recording of snapshot locations and expanded snapshot locations.

Abstract: In an embodiment, in response to detecting a request by a program to access a network, if the request is the first time that the program requests to access the network, a subset of instructions is replaced in the program with supervisor call instructions. The supervisor call instructions cause respective interrupts of execution of the program. In response to each of the respective interrupts of execution of the program, the supervisor call instructions that caused the respective interrupts are replaced with the respective swapped instructions, and if a number of the respective interrupts of execution exceed a trap threshold, all remaining of the respective swapped instructions are stored to the program.

Abstract: Methods, apparatuses, and computer program products for analyzing concurrent debugging sessions are provided. Embodiments include a first debugger initiating a conditional breakpoint in a first debug session of a first application. The conditional breakpoint stops execution of the first application based on a condition of a value of a variable of a second application. Embodiments also include the first debugger requesting and receiving the value of the variable from a second debugger. Embodiments also include the first debugger evaluating the condition of the conditional breakpoint based on the received value of the variable.

Abstract: An indication of a version of a firmware stored in an input/output adapter may be provided by a method that includes detecting whether a first pin is connected to an external circuit, detecting whether a second pin is unconnected to an external circuit, and causing the indication to be provided if the first pin is connected and the second pin is unconnected. The indication may be provided on the first pin. The first pin may include a power supply pin and the indication may be an average rate of power supplied to the input/output adapter.

Abstract: A method, computer-readable storage medium, and computer system are provided. In an embodiment, a detection is made that at least one thread, in a plurality of threads executing in a computer, has hung. A lock order of a plurality of locks used by the plurality of threads is determined. A determination is made that a first thread in the plurality of threads violates the lock order. After the determination that the first thread violates the lock order, the computer is restarted and the first thread that violates the lock order is scheduled on a reduced-speed processor.

Abstract: An indication of a version of a firmware stored in an input/output adapter may be provided by a method that includes detecting whether a first pin is connected to an external circuit, detecting whether a second pin is unconnected to an external circuit, and causing the indication to be provided if the first pin is connected and the second pin is unconnected. The indication may be provided on the first pin. The first pin may include a power supply pin and the indication may be an average rate of power supplied to the input/output adapter.

Abstract: Crash notification between debuggers, including: initiating, by a first debugger, a first debug session of a first application; detecting, by the first debugger, an error condition in the first application; determining, by the first debugger, whether any variables utilized by the first application are related to variables utilized by a second application, wherein the second application is being debugged in a second debug session by a second debugger; and communicating, by the first debugger to a second debugger, information associated with the error condition in the first application.

Abstract: Crash notification between debuggers, including: initiating, by a first debugger, a first debug session of a first application; detecting, by the first debugger, an error condition in the first application; determining, by the first debugger, whether any variables utilized by the first application are related to variables utilized by a second application, wherein the second application is being debugged in a second debug session by a second debugger; and communicating, by the first debugger to a second debugger, information associated with the error condition in the first application.