Tag: Systems Programming
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Dissecting the Rust Vtable: Dynamic Dispatch vs. Monomorphization in Assembly
Read more: Dissecting the Rust Vtable: Dynamic Dispatch vs. Monomorphization in AssemblyDynamic dispatch via fat pointers imposes a double dereference penalty, prevents LLVM compiler inlining passes, and degrades CPU Branch Target Buffer throughput under polymorphic workloads, whereas generic monomorphization eliminates runtime…
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Why fork() Doesn’t Duplicate Memory: Copy-on-Write and the Page Table
Read more: Why fork() Doesn’t Duplicate Memory: Copy-on-Write and the Page Tablefork() relies on Copy-on-Write (COW) by duplicating page table hierarchies while marking physical pages read-only. When child or parent processes write to dense memory states, the resulting cascade of page…
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What std::mem::forget Actually Does to Heap Allocations?
Read more: What std::mem::forget Actually Does to Heap Allocations?std::mem::forget drops the stack-allocated handle without executing Drop glue, permanently orphaning heap metadata within allocator arenas. It guarantees the absence of Undefined Behavior by design, while silently converting bounded operational…
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Why Does Zig Treat Allocation Failure as Normal?
Read more: Why Does Zig Treat Allocation Failure as Normal?Modern systems programming languages implicitly encourage a dangerous idea: that memory is either infinite or that running out of it is so bad that it’s not worth trying to fix.…