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fix(IDX): make replica build more deterministic (#2441)
This includes a couple of fixes to make the replica build more deterministic. This in theory allows anyone building `//rs/replica` with Bazel in the Docker image to get a bit-for-bit reproducible replica executable, and this should also improve Bazel cache hit rates. This fixes for the following issues: * Non-reproducible `jemalloc` build: the `tikv-jemalloc-sys` crate vendors `jemalloc` and builds it as part of `build.rs`. Unfortunately that build in not deterministic. To make it more deterministic we build `jemalloc` separately, which also speeds up rebuilds as the C code does not need to be rebuilt when rust versions change. We only enable this in Linux; this also includes a patch to support this in `rules_rust`: bazelbuild/rules_rust#2981 * Non-reproducible `rules_rust` build log: this includes a backport of a fix that disables build logs in `rules_rust` by default (backported because our build is not compatible with the latest `rules_rust`) bazelbuild/rules_rust#2974 * Non-reproducible make & pkgconfig toolchains: some toolchains packaged by `rules_foreign_cc` cause build determinism issues so instead we use the ones installed in the container and remove build logs: bazel-contrib/rules_foreign_cc#1313 * Non-reproducible obj file generation in cc-rs: the `cc-rs` crate used in many C builds, including the (ASM) build of `ring`'s crypto bits, generates object files that include the Bazel sandbox full path: rust-lang/cc-rs#1271 * Non-reproducible codegen: `cranelift-isle` and `cranelift-codegen-meta` include references to source files as absolute paths that include the Bazel sandbox path: bytecodealliance/wasmtime#9553
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| diff --git a/src/lib.rs b/src/lib.rs | ||
| index 2fe30b9..88cd566 100644 | ||
| --- a/src/lib.rs | ||
| +++ b/src/lib.rs | ||
| @@ -1121,6 +1121,13 @@ impl Build { | ||
| .ok_or_else(|| Error::new(ErrorKind::InvalidArgument, "parent() failure"))? | ||
| .to_string_lossy(); | ||
| let mut hasher = hash_map::DefaultHasher::new(); | ||
| + let out_dir = self.get_out_dir().expect("Could not get out dir"); | ||
| + | ||
| + let prefix = out_dir.parent().expect("Could not get parent"); | ||
| + let prefix: &str = &prefix.to_string_lossy(); | ||
| + | ||
| + let err = format!("could not strip prefix {prefix} from {dirname}"); | ||
| + let dirname = dirname.strip_prefix(prefix).expect(&err); | ||
| hasher.write(dirname.to_string().as_bytes()); | ||
| dst.join(format!("{:016x}-{}", hasher.finish(), basename)) | ||
| .with_extension("o") |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| # Fix for https://github.com/bytecodealliance/wasmtime/issues/9553 | ||
| diff --git a/cranelift/codegen/meta/src/srcgen.rs b/cranelift/codegen/meta/src/srcgen.rs | ||
| index d3c321e5b..5b94ddd19 100644 | ||
| --- a/cranelift/codegen/meta/src/srcgen.rs | ||
| +++ b/cranelift/codegen/meta/src/srcgen.rs | ||
| @@ -94,7 +94,6 @@ impl Formatter { | ||
| directory: &std::path::Path, | ||
| ) -> Result<(), error::Error> { | ||
| let path = directory.join(&filename); | ||
| - eprintln!("Writing generated file: {}", path.display()); | ||
| let mut f = fs::File::create(path)?; | ||
|
|
||
| for l in self.lines.iter().map(|l| l.as_bytes()) { |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| # Fix for https://github.com/bytecodealliance/wasmtime/issues/9553 | ||
| diff --git a/cranelift/isle/isle/src/codegen.rs b/cranelift/isle/isle/src/codegen.rs | ||
| index 158285832..d292e43c0 100644 | ||
| --- a/cranelift/isle/isle/src/codegen.rs | ||
| +++ b/cranelift/isle/isle/src/codegen.rs | ||
| @@ -127,9 +127,6 @@ impl<'a> Codegen<'a> { | ||
| "// Generated automatically from the instruction-selection DSL code in:", | ||
| ) | ||
| .unwrap(); | ||
| - for file in &self.files.file_names { | ||
| - writeln!(code, "// - {file}").unwrap(); | ||
| - } | ||
|
|
||
| if !options.exclude_global_allow_pragmas { | ||
| writeln!( | ||
| @@ -641,12 +638,11 @@ impl<L: Length, C> Length for ContextIterWrapper<L, C> {{ | ||
| stack.push((Self::validate_block(ret_kind, body), "", scope)); | ||
| } | ||
|
|
||
| - &ControlFlow::Return { pos, result } => { | ||
| + &ControlFlow::Return { pos: _pos, result } => { | ||
| writeln!( | ||
| ctx.out, | ||
| - "{}// Rule at {}.", | ||
| + "{}", | ||
| &ctx.indent, | ||
| - pos.pretty_print_line(&self.files) | ||
| )?; | ||
| write!(ctx.out, "{}", &ctx.indent)?; | ||
| match ret_kind { |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| # Avoid build logs that create sources of non-determinism | ||
| diff --git a/foreign_cc/private/framework.bzl b/foreign_cc/private/framework.bzl | ||
| index 33129b8..7326107 100644 | ||
| --- a/foreign_cc/private/framework.bzl | ||
| +++ b/foreign_cc/private/framework.bzl | ||
| @@ -616,7 +616,7 @@ def wrap_outputs(ctx, lib_name, configure_name, script_text, env_prelude, build_ | ||
| cleanup_on_success_function = create_function( | ||
| ctx, | ||
| "cleanup_on_success", | ||
| - "rm -rf $$BUILD_TMPDIR$$ $$EXT_BUILD_DEPS$$", | ||
| + "rm -rf $$BUILD_TMPDIR$$ $$EXT_BUILD_DEPS$$ && echo > $$BUILD_LOG$$", | ||
| ) | ||
| cleanup_on_failure_function = create_function( | ||
| ctx, |
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