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aya/test
Tamir Duberstein e9a099f332 bpf: Remove builtin global functions
This commit removes memset and memcpy, relying instead on
implementations provided by std/compiler-builtins.

This commit adds `#![no_builtins]` to all the BPF programs written in
Rust, and the same should be propagated to aya-template and all examples
in the book and elsewhere before this commit is merged.

It turns out that without the `#![no_builtins]` annotation rustc
generates LLVM IR that calls LLVM intrinsics rather than libcalls. These
may end up as libcalls after lowering, but not before emitting errors in
BPF lowering[0].

This works thanks to https://github.com/rust-lang/rust/pull/113716 which
causes `#![no_builtins]` to behave similarly to `-fno-builtin` in clang,
which was added in https://reviews.llvm.org/D68028 with similar
motivation.

This commit implies that we now require rustc nightly >= 2023-07-20.

[0] https://github.com/llvm/llvm-project/blob/7b2745b/llvm/lib/Target/BPF/BPFISelLowering.cpp#L472-L474
2 years ago
..
integration-ebpf bpf: Remove builtin global functions 2 years ago
integration-test github: run integration tests on local kernel 2 years ago
.gitignore test: Replace RTF with Rust 3 years ago
README.md integration-test: Implement running on VMs 2 years ago

README.md

Aya Integration Tests

The aya integration test suite is a set of tests to ensure that common usage behaviours work on real Linux distros

Prerequisites

You'll need:

  1. rustup toolchain install nightly
  2. rustup target add {aarch64,x86_64}-unknown-linux-musl
  3. cargo install bpf-linker
  4. (virtualized only) qemu

Usage

From the root of this repository:

Native

cargo xtask integration-test local

Virtualized

cargo xtask integration-test vm

Writing an integration test

Tests should follow these guidelines:

  • Rust eBPF code should live in integration-ebpf/${NAME}.rs and included in integration-ebpf/Cargo.toml and integration-test/src/lib.rs using include_bytes_aligned!.
  • C eBPF code should live in integration-test/bpf/${NAME}.bpf.c. It should be added to the list of files in integration-test/build.rs and the list of constants in integration-test/src/lib.rs using include_bytes_aligned!.
  • Tests should be added to integration-test/tests.
  • You may add a new module, or use an existing one.
  • Test functions should not return anyhow::Result<()> since this produces errors without stack traces. Prefer to panic! instead.