Merging upstream version 1.76.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 860 insertions, 3 deletions

diff --git a/src/tools/cargo/benches/README.md b/src/tools/cargo/benches/README.md
index b4b8b190a..900bf084c 100644
--- a/src/tools/cargo/benches/README.md
+++ b/src/tools/cargo/benches/README.md
@@ -9,7 +9,23 @@ cd benches/benchsuite
 cargo bench
 ```
 
-The tests involve downloading the index and benchmarking against some
+However, running all benchmarks would take many minutes, so in most cases it
+is recommended to just run the benchmarks relevant to whatever section of code
+you are working on.
+
+## Benchmarks
+
+There are several different kinds of benchmarks in the `benchsuite/benches` directory:
+
+* `global_cache_tracker` — Benchmarks saving data to the global cache tracker
+  database using samples of real-world data.
+* `resolve` — Benchmarks the resolver against simulations of real-world workspaces.
+* `workspace_initialization` — Benchmarks initialization of a workspace
+  against simulations of real-world workspaces.
+
+### Resolve benchmarks
+
+The resolve benchmarks involve downloading the index and benchmarking against some
 real-world and artificial workspaces located in the [`workspaces`](workspaces)
 directory.
 
@@ -21,7 +37,7 @@ faster. You can (and probably should) specify individual benchmarks to run to
 narrow it down to a more reasonable set, for example:
 
 ```sh
-cargo bench -- resolve_ws/rust
+cargo bench -p benchsuite --bench resolve -- resolve_ws/rust
 ```
 
 This will only download what's necessary for the rust-lang/rust workspace
@@ -29,7 +45,24 @@ This will only download what's necessary for the rust-lang/rust workspace
 about a minute). To get a list of all the benchmarks, run:
 
 ```sh
-cargo bench -- --list
+cargo bench -p benchsuite --bench resolve -- --list
+```
+
+### Global cache tracker
+
+The `global_cache_tracker` benchmark tests saving data to the global cache
+tracker database using samples of real-world data. This benchmark should run
+relatively quickly.
+
+The real-world data is based on a capture of my personal development
+environment which has accumulated a large cache. So it is somewhat arbitrary,
+but hopefully representative of a challenging environment. Capturing of the
+data is done with the `capture-last-use` binary, which you can run if you need
+to rebuild the database. Just try to run on a system with a relatively full
+cache in your cargo home directory.
+
+```sh
+cargo bench -p benchsuite --bench global_cache_tracker
 ```
 
 ## Viewing reports
diff --git a/src/tools/cargo/benches/benchsuite/Cargo.toml b/src/tools/cargo/benches/benchsuite/Cargo.toml
index 81413e761..25c160438 100644
--- a/src/tools/cargo/benches/benchsuite/Cargo.toml
+++ b/src/tools/cargo/benches/benchsuite/Cargo.toml
@@ -11,8 +11,10 @@ publish = false
 
 [dependencies]
 cargo.workspace = true
+cargo-util.workspace = true
 criterion.workspace = true
 flate2.workspace = true
+rand.workspace = true
 tar.workspace = true
 url.workspace = true
 
@@ -26,3 +28,10 @@ harness = false
 [[bench]]
 name = "workspace_initialization"
 harness = false
+
+[[bench]]
+name = "global_cache_tracker"
+harness = false
+
+[lints]
+workspace = true
diff --git a/src/tools/cargo/benches/benchsuite/benches/global_cache_tracker.rs b/src/tools/cargo/benches/benchsuite/benches/global_cache_tracker.rs
new file mode 100644
index 000000000..71d5d5262
--- /dev/null
+++ b/src/tools/cargo/benches/benchsuite/benches/global_cache_tracker.rs
@@ -0,0 +1,159 @@
+//! Benchmarks for the global cache tracker.
+
+use cargo::core::global_cache_tracker::{self, DeferredGlobalLastUse, GlobalCacheTracker};
+use cargo::util::cache_lock::CacheLockMode;
+use cargo::util::interning::InternedString;
+use cargo::util::Config;
+use criterion::{criterion_group, criterion_main, Criterion};
+use std::fs;
+use std::path::{Path, PathBuf};
+
+// Samples of real-world data.
+const GLOBAL_CACHE_SAMPLE: &str = "global-cache-tracker/global-cache-sample";
+const GLOBAL_CACHE_RANDOM: &str = "global-cache-tracker/random-sample";
+
+/// A scratch directory where the benchmark can place some files.
+fn root() -> PathBuf {
+    let mut p = PathBuf::from(env!("CARGO_TARGET_TMPDIR"));
+    p.push("bench_global_cache_tracker");
+    p
+}
+
+fn cargo_home() -> PathBuf {
+    let mut p = root();
+    p.push("chome");
+    p
+}
+
+fn initialize_config() -> Config {
+    // Set up config.
+    let shell = cargo::core::Shell::new();
+    let homedir = cargo_home();
+    if !homedir.exists() {
+        fs::create_dir_all(&homedir).unwrap();
+    }
+    let cwd = homedir.clone();
+    let mut config = Config::new(shell, cwd, homedir);
+    config.nightly_features_allowed = true;
+    config.set_search_stop_path(root());
+    config
+        .configure(
+            0,
+            false,
+            None,
+            false,
+            false,
+            false,
+            &None,
+            &["gc".to_string()],
+            &[],
+        )
+        .unwrap();
+    // Set up database sample.
+    let db_path = GlobalCacheTracker::db_path(&config).into_path_unlocked();
+    if db_path.exists() {
+        fs::remove_file(&db_path).unwrap();
+    }
+    let sample = Path::new(env!("CARGO_MANIFEST_DIR")).join(GLOBAL_CACHE_SAMPLE);
+    fs::copy(sample, &db_path).unwrap();
+    config
+}
+
+/// Benchmarks how long it takes to initialize `GlobalCacheTracker` with an already
+/// existing full database.
+fn global_tracker_init(c: &mut Criterion) {
+    let config = initialize_config();
+    let _lock = config
+        .acquire_package_cache_lock(CacheLockMode::DownloadExclusive)
+        .unwrap();
+    c.bench_function("global_tracker_init", |b| {
+        b.iter(|| {
+            GlobalCacheTracker::new(&config).unwrap();
+        })
+    });
+}
+
+/// Benchmarks how long it takes to save a `GlobalCacheTracker` when there are zero
+/// updates.
+fn global_tracker_empty_save(c: &mut Criterion) {
+    let config = initialize_config();
+    let _lock = config
+        .acquire_package_cache_lock(CacheLockMode::DownloadExclusive)
+        .unwrap();
+    let mut deferred = DeferredGlobalLastUse::new();
+    let mut tracker = GlobalCacheTracker::new(&config).unwrap();
+
+    c.bench_function("global_tracker_empty_save", |b| {
+        b.iter(|| {
+            deferred.save(&mut tracker).unwrap();
+        })
+    });
+}
+
+fn load_random_sample() -> Vec<(InternedString, InternedString, u64)> {
+    let path = Path::new(env!("CARGO_MANIFEST_DIR")).join(GLOBAL_CACHE_RANDOM);
+    fs::read_to_string(path)
+        .unwrap()
+        .lines()
+        .map(|s| {
+            let mut s = s.split(',');
+            (
+                s.next().unwrap().into(),
+                s.next().unwrap().into(),
+                s.next().unwrap().parse().unwrap(),
+            )
+        })
+        .collect()
+}
+
+/// Tests performance of updating the last-use timestamps in an already
+/// populated database.
+///
+/// This runs for different sizes of number of crates to update (selecting
+/// from the random sample stored on disk).
+fn global_tracker_update(c: &mut Criterion) {
+    let config = initialize_config();
+    let _lock = config
+        .acquire_package_cache_lock(CacheLockMode::DownloadExclusive)
+        .unwrap();
+    let sample = Path::new(env!("CARGO_MANIFEST_DIR")).join(GLOBAL_CACHE_SAMPLE);
+    let db_path = GlobalCacheTracker::db_path(&config).into_path_unlocked();
+
+    let random_sample = load_random_sample();
+
+    let mut group = c.benchmark_group("global_tracker_update");
+    for size in [1, 10, 100, 500] {
+        if db_path.exists() {
+            fs::remove_file(&db_path).unwrap();
+        }
+
+        fs::copy(&sample, &db_path).unwrap();
+        let mut deferred = DeferredGlobalLastUse::new();
+        let mut tracker = GlobalCacheTracker::new(&config).unwrap();
+        group.bench_with_input(size.to_string(), &size, |b, &size| {
+            b.iter(|| {
+                for (encoded_registry_name, name, size) in &random_sample[..size] {
+                    deferred.mark_registry_crate_used(global_cache_tracker::RegistryCrate {
+                        encoded_registry_name: *encoded_registry_name,
+                        crate_filename: format!("{}.crate", name).into(),
+                        size: *size,
+                    });
+                    deferred.mark_registry_src_used(global_cache_tracker::RegistrySrc {
+                        encoded_registry_name: *encoded_registry_name,
+                        package_dir: *name,
+                        size: Some(*size),
+                    });
+                }
+                deferred.save(&mut tracker).unwrap();
+            })
+        });
+    }
+}
+
+criterion_group!(
+    benches,
+    global_tracker_init,
+    global_tracker_empty_save,
+    global_tracker_update
+);
+criterion_main!(benches);
diff --git a/src/tools/cargo/benches/benchsuite/global-cache-tracker/global-cache-sample b/src/tools/cargo/benches/benchsuite/global-cache-tracker/global-cache-sample
new file mode 100644
index 000000000..dc134f538
--- /dev/null
+++ b/src/tools/cargo/benches/benchsuite/global-cache-tracker/global-cache-sample
diff --git a/src/tools/cargo/benches/benchsuite/global-cache-tracker/random-sample b/src/tools/cargo/benches/benchsuite/global-cache-tracker/random-sample
new file mode 100644
index 000000000..62b611cff
--- /dev/null
+++ b/src/tools/cargo/benches/benchsuite/global-cache-tracker/random-sample
@@ -0,0 +1,500 @@
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diff --git a/src/tools/cargo/benches/benchsuite/src/bin/capture-last-use.rs b/src/tools/cargo/benches/benchsuite/src/bin/capture-last-use.rs
new file mode 100644
index 000000000..3034d49ac
--- /dev/null
+++ b/src/tools/cargo/benches/benchsuite/src/bin/capture-last-use.rs
@@ -0,0 +1,148 @@
+//! Utility for capturing a global cache last-use database based on the files
+//! on a real-world system.
+//!
+//! This will look in the CARGO_HOME of the current system and record last-use
+//! data for all files in the cache. This is intended to provide a real-world
+//! example for a benchmark that should be close to what a real set of data
+//! should look like.
+//!
+//! See `benches/global_cache_tracker.rs` for the benchmark that uses this
+//! data.
+//!
+//! The database is kept in git. It usually shouldn't need to be re-generated
+//! unless there is a change in the schema or the benchmark.
+
+use cargo::core::global_cache_tracker::{self, DeferredGlobalLastUse, GlobalCacheTracker};
+use cargo::util::cache_lock::CacheLockMode;
+use cargo::util::interning::InternedString;
+use cargo::Config;
+use rand::prelude::SliceRandom;
+use std::collections::HashMap;
+use std::fs;
+use std::fs::File;
+use std::io::Write;
+use std::path::Path;
+
+fn main() {
+    // Set up config.
+    let shell = cargo::core::Shell::new();
+    let homedir = Path::new(env!("CARGO_MANIFEST_DIR")).join("global-cache-tracker");
+    let cwd = homedir.clone();
+    let mut config = Config::new(shell, cwd, homedir.clone());
+    config
+        .configure(
+            0,
+            false,
+            None,
+            false,
+            false,
+            false,
+            &None,
+            &["gc".to_string()],
+            &[],
+        )
+        .unwrap();
+    let db_path = GlobalCacheTracker::db_path(&config).into_path_unlocked();
+    if db_path.exists() {
+        fs::remove_file(&db_path).unwrap();
+    }
+
+    let _lock = config
+        .acquire_package_cache_lock(CacheLockMode::DownloadExclusive)
+        .unwrap();
+    let mut deferred = DeferredGlobalLastUse::new();
+    let mut tracker = GlobalCacheTracker::new(&config).unwrap();
+
+    let real_home = cargo::util::homedir(&std::env::current_dir().unwrap()).unwrap();
+
+    let cache_dir = real_home.join("registry/cache");
+    for dir_ent in fs::read_dir(cache_dir).unwrap() {
+        let registry = dir_ent.unwrap();
+        let encoded_registry_name = InternedString::new(&registry.file_name().to_string_lossy());
+        for krate in fs::read_dir(registry.path()).unwrap() {
+            let krate = krate.unwrap();
+            let meta = krate.metadata().unwrap();
+            deferred.mark_registry_crate_used_stamp(
+                global_cache_tracker::RegistryCrate {
+                    encoded_registry_name,
+                    crate_filename: krate.file_name().to_string_lossy().as_ref().into(),
+                    size: meta.len(),
+                },
+                Some(&meta.modified().unwrap()),
+            );
+        }
+    }
+
+    let mut src_entries = Vec::new();
+
+    let cache_dir = real_home.join("registry/src");
+    for dir_ent in fs::read_dir(cache_dir).unwrap() {
+        let registry = dir_ent.unwrap();
+        let encoded_registry_name = InternedString::new(&registry.file_name().to_string_lossy());
+        for krate in fs::read_dir(registry.path()).unwrap() {
+            let krate = krate.unwrap();
+            let meta = krate.metadata().unwrap();
+            let src = global_cache_tracker::RegistrySrc {
+                encoded_registry_name,
+                package_dir: krate.file_name().to_string_lossy().as_ref().into(),
+                size: Some(cargo_util::du(&krate.path(), &[]).unwrap()),
+            };
+            src_entries.push(src.clone());
+            let timestamp = meta.modified().unwrap();
+            deferred.mark_registry_src_used_stamp(src, Some(&timestamp));
+        }
+    }
+
+    let git_co_dir = real_home.join("git/checkouts");
+    for dir_ent in fs::read_dir(git_co_dir).unwrap() {
+        let git_source = dir_ent.unwrap();
+        let encoded_git_name = InternedString::new(&git_source.file_name().to_string_lossy());
+        for co in fs::read_dir(git_source.path()).unwrap() {
+            let co = co.unwrap();
+            let meta = co.metadata().unwrap();
+            deferred.mark_git_checkout_used_stamp(
+                global_cache_tracker::GitCheckout {
+                    encoded_git_name,
+                    short_name: co.file_name().to_string_lossy().as_ref().into(),
+                    size: Some(cargo_util::du(&co.path(), &[]).unwrap()),
+                },
+                Some(&meta.modified().unwrap()),
+            );
+        }
+    }
+
+    deferred.save(&mut tracker).unwrap();
+    drop(deferred);
+    drop(tracker);
+    fs::rename(&db_path, homedir.join("global-cache-sample")).unwrap();
+    // Clean up the lock file created above.
+    fs::remove_file(homedir.join(".package-cache")).unwrap();
+
+    // Save a random sample of crates that the benchmark should update.
+    // Pick whichever registry has the most entries. This is to be somewhat
+    // realistic for the common case that all dependencies come from one
+    // registry (crates.io).
+    let mut counts = HashMap::new();
+    for src in &src_entries {
+        let c: &mut u32 = counts.entry(src.encoded_registry_name).or_default();
+        *c += 1;
+    }
+    let mut counts: Vec<_> = counts.into_iter().map(|(k, v)| (v, k)).collect();
+    counts.sort();
+    let biggest = counts.last().unwrap().1;
+
+    src_entries.retain(|src| src.encoded_registry_name == biggest);
+    let mut rng = &mut rand::thread_rng();
+    let sample: Vec<_> = src_entries.choose_multiple(&mut rng, 500).collect();
+    let mut f = File::create(homedir.join("random-sample")).unwrap();
+    for src in sample {
+        writeln!(
+            f,
+            "{},{},{}",
+            src.encoded_registry_name,
+            src.package_dir,
+            src.size.unwrap()
+        )
+        .unwrap();
+    }
+}
diff --git a/src/tools/cargo/benches/benchsuite/src/lib.rs b/src/tools/cargo/benches/benchsuite/src/lib.rs
index e470a03b9..f27710841 100644
--- a/src/tools/cargo/benches/benchsuite/src/lib.rs
+++ b/src/tools/cargo/benches/benchsuite/src/lib.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::disallowed_methods)]
+
 use cargo::Config;
 use std::fs;
 use std::path::{Path, PathBuf};
diff --git a/src/tools/cargo/benches/capture/Cargo.toml b/src/tools/cargo/benches/capture/Cargo.toml
index e300815d5..16f2c5071 100644
--- a/src/tools/cargo/benches/capture/Cargo.toml
+++ b/src/tools/cargo/benches/capture/Cargo.toml
@@ -12,3 +12,6 @@ cargo_metadata.workspace = true
 flate2.workspace = true
 tar.workspace = true
 toml.workspace = true
+
+[lints]
+workspace = true
diff --git a/src/tools/cargo/benches/capture/src/main.rs b/src/tools/cargo/benches/capture/src/main.rs
index f6f02c4ba..dcded3b1a 100644
--- a/src/tools/cargo/benches/capture/src/main.rs
+++ b/src/tools/cargo/benches/capture/src/main.rs
@@ -4,6 +4,9 @@
 //! Use the `-f` flag to allow it to overwrite existing captures.
 //! The workspace will be saved in a `.tgz` file in the `../workspaces` directory.
 
+#![allow(clippy::disallowed_methods)]
+#![allow(clippy::print_stderr)]
+
 use flate2::{Compression, GzBuilder};
 use std::fs;
 use std::path::{Path, PathBuf};