Supporting inter-process communication through a conditional trap instruction


One embodiment of the present invention provides a system that supports inter-process communication through use of a conditional trap instruction. The system operates by allowing a first process to send a communication to a second process by writing to a register that is visible to the second process. The second process then examines a value in the register by executing the conditional trap instruction. If the value in the register satisfies a condition specified by the conditional trap instruction, the system executes a trap handling routine that takes an action in response to the communication from the first process. If the value in the register does not satisfy the condition, the system takes no action and proceeds with execution of the code. In one embodiment of the present invention, the first process writes to the register by causing an interrupt that writes to the register.


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