abhinav srivastav github ↗

rust / compilers / systems / arm64

abhinav
srivastav

systems · compilers · low-level

i work on rust compiler and toolchain internals, and build small systems projects to understand things from the compiler down.

rust compiler work ↓ paradoxicalguy ↗
focusrustc · bootstrap · llvm
systemslinux · windows · arm64
formatself · pe · dwarf · codeview · pdb
01rust

rust compiler work

work across compiler and bootstrap code, build paths, native compilation, artifact formats, and regression tests.

bootstrap / pathsmerged

path remapping across rust and native compilation

removed build-root and OUT_DIR leakage from crate metadata and bootstrap output paths, including windows-style paths. extended debug-prefix remapping into c/c++ compilation where rustc-only remapping does not apply.

#155935 #156186 #156504 #159673
repro testsmerged

reproducibility coverage for shipped artifacts

re-enabled reproducible binary testing with full debug information on linux and expanded stdlib path-remapping coverage from a single archive to the distributed .rlib set.

#151517 #156570
windows / msvcmerged + active

windows artifact reproducibility

applied /Brepro to bootstrap-built msvc artifacts with regression coverage. investigated compiler-rt archive differences down to CodeView S_OBJNAME records, object output paths, and archive member naming.

C:\build-a\...\ucmpti2.obj→ucmpti2.obj
#158873 #157914
02upstream

rust-lang/rust contributions

merged and active pull requests around compiler infrastructure, bootstrap, windows artifacts, llvm paths, and codegen tests.

08merged01active
159673forward debug-prefix mapping when bootstrap resolves the c compiler to ccbootstrap 158873apply /Brepro in bootstrap on msvc with regression coveragewindows 157914make compiler-rt archives reproducible on windowsactive 156570extend stdlib remap-path coverage to distributed rlibstests 156504remap windows-style out_dir paths in bootstrapbootstrap 156186remap ci-llvm debug paths with file-prefix mappingllvm 155935remove OUT_DIR path leakage from crate metadatabootstrap 151517enable reproducible binary builds with debug info on linuxtests 150368add ordering support to minicore for a no_core codegen testcodegen
03projects

projects

small systems projects built to understand compilers, storage, assembly, and data structures directly.

quasar v2 · rust · arm64

c-like compiler targeting aarch64

lexer, parser, semantic analysis, optimization, and arm64 code generation, assembled and executed through qemu.
rust / storage

rust-ffs

file-system experiments focused on storage internals and on-disk structures.

 arm64 / assembly

arm64 scripts

assembly experiments covering arithmetic, shifts, rotates, and direct aarch64 work.

 rust

orderbook

an order book that records adds, sells, matches, and trades.

 rust / cli

cli-todo

a command-line todo application built without serde or clap.
04debugging

how i investigate build differences

the process is usually mechanical: reproduce the mismatch, narrow the artifact, inspect the relevant format, then fix the earliest unstable input.

  1. 01
    rebuild

    use the same source in intentionally different paths or environments.

  2. 02
    compare

    check hashes and isolate the first artifact that differs.

  3. 03
    inspect

    open archives, crate metadata, objects, dwarf, codeview, pdb data, or symbols.

  4. 04
    localize

    find the flag, path, record, or build input responsible for the difference.

  5. 05
    regress

    fix the cause and encode the expected behaviour in a test where it makes sense.

diffoscope · llvm-readobj · llvm-dwarfdump · llvm-pdbutil · rustc -Zls · bootstrap

abhinav srivastav

rust · compilers · systems

github ↗ x ↗ medium ↗