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Understand and Implement a Basic JIT Compiler

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Language

Compiler

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Implementation

Implement basic JIT compiler for simple expressions.

Requirements:

Parse arithmetic expressions
Generate x86-64 machine code
Allocate executable memory
Copy generated code to executable memory
Execute JIT-compiled code
Return results safely
Test with various expressions

Why This Matters

JIT compilation — emitting machine code into executable memory at runtime — is how V8 runs JavaScript within a factor of C, and how the JVM, .NET, and LuaJIT earn their performance. The mmap+mprotect dance you implement is the same one those VMs perform, now constrained by W^X policies on iOS and modern Linux.

Hints

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Validation Suite

main.c

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