Watchpoint Instruction
ConceptIn the MorFuzz processor-fuzzing workflow, watchpoint instructions are inserted at specific locations in sequence patterns to expose the device under test's internal state and improve observability during stimulus-template execution.
First seen 5/27/2026
Last seen 6/6/2026
Evidence 3 chunks
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Overview
A watchpoint instruction is described in the MorFuzz evidence as an instruction inserted into generated instruction sequences at specific locations to expose the internal state of the device under test (DUT). Its stated purpose is to enhance observability during processor fuzzing. [C1]
Role in MorFuzz
NEIGHBORHOOD
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3 connectionsMorFuzz uses watchpoint instructions inserted at specific locations to enhance observability of the DUT's internal state.
Stimulus template uses watchpoint instructions to expose the DUT's internal state.
The stimulus template uses watchpoint instructions to enhance observability.
LINKED ENTITIES
2 linksCITATIONS
4 sources4 citations — click to collapse
[1] C1: Watchpoint instructions are inserted at specific locations to expose DUT internal state and enhance observability. MorFuzz: Fuzzing Processor via Runtime Instruction Morphing enhanced Synchronizable Co-simulation
[2] C2: MorFuzz generates template instructions at block granularity and uses manually constructed sequence patterns in testing blocks to constrain instruction types and reach desired test points. MorFuzz: Fuzzing Processor via Runtime Instruction Morphing enhanced Synchronizable Co-simulation
[3] C3: MorFuzz uses instructions that read the floating-point exception flag CSR after a floating-point instruction sequence to check whether the exception flag is set correctly. MorFuzz: Fuzzing Processor via Runtime Instruction Morphing enhanced Synchronizable Co-simulation
[4] C4: Template instructions support the memory layout of the stimulus template, are later filled with meaningful values by MorFuzz, and the fuzzer manages stimulus-template control flow through the fuzzing execution environment. MorFuzz: Fuzzing Processor via Runtime Instruction Morphing enhanced Synchronizable Co-simulation