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* feat!: add Rego Virtual Machine (RVM) implementation This commit introduces a register-based virtual machine for executing Rego policies with bytecode-style instructions. Unlike the existing tree-walking interpreter, the RVM compiles policies into instruction sequences that operate on virtual registers, offering better performance and optimization potential. Core Components: Instruction Set Architecture: - Define instruction types for data operations, control flow, and builtins - Implement instruction parameter encoding and display formatting - Add instruction parser with comprehensive test coverage Virtual Machine Engine: - Register-based execution model with program counter management - Loop execution supporting iterators, comprehensions, and quantifiers - Function call handling with argument evaluation and context management - Rule evaluation with default value resolution and virtual data support - Arithmetic and comparison operation implementations Program Representation: - Program listing builder with instruction sequencing - Rule tree construction for organizing policy rules - Binary and JSON serialization for compiled programs - Recompilation support for program modification Testing Infrastructure: - Extensive YAML test suites covering all VM features - Rust unit tests for VM execution and instruction parsing - Test suites for loops, comprehensions, builtins, and control flow BREAKING CHANGE: Introduces new VM execution path alongside interpreter Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com> * docs: add detailed RVM architecture references Introduce architecture.md explaining program artifacts, serialization, and runtime subsystems. Document the full opcode catalog in instruction-set.md, including operands, parameter tables, and outcomes. Walk through execution flow, stacks, and operational guidance in vm-runtime.md, tying the runtime to the new architecture docs. Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com> --------- Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
44 lines
1.2 KiB
YAML
44 lines
1.2 KiB
YAML
# Loop Invalid Iteration Test Suite
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# Asserts loop error paths and instruction limit behavior.
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cases:
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- note: loop_start_on_scalar
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description: LoopStart over scalar treats collection as empty and leaves result false
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literals:
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- 1
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instruction_params:
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loop_params:
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- mode: "ForEach"
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collection: 0
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key_reg: 1
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value_reg: 2
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result_reg: 3
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body_start: 2
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loop_end: 2
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instructions:
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- "Load { dest: 0, literal_idx: 0 }"
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- "LoopStart { params_index: 0 }"
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- "Return { value: 3 }"
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want_result: false
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- note: instruction_limit_exceeded
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description: VM stops once max instruction limit reached
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literals:
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- [1, 2]
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instruction_params:
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loop_params:
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- mode: "ForEach"
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collection: 0
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key_reg: 1
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value_reg: 2
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result_reg: 3
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body_start: 2
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loop_end: 4
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max_instructions: 3
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instructions:
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- "Load { dest: 0, literal_idx: 0 }"
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- "LoopStart { params_index: 0 }"
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- "LoopNext { body_start: 2, loop_end: 4 }"
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- "Return { value: 3 }"
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want_error: "exceeded maximum instruction limit"
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