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use rustc::dep_graph::{DepGraph, DepKind};
use rustc::session::Session;
use rustc::ty::TyCtxt;
use rustc::util::common::time;
use rustc_data_structures::fx::FxHashMap;
use rustc_serialize::Encodable as RustcEncodable;
use rustc_serialize::opaque::Encoder;
use std::io::{self, Cursor};
use std::fs;
use std::path::PathBuf;
use super::data::*;
use super::fs::*;
use super::dirty_clean;
use super::file_format;
use super::work_product;
pub fn save_dep_graph<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
debug!("save_dep_graph()");
tcx.dep_graph.with_ignore(|| {
let sess = tcx.sess;
if sess.opts.incremental.is_none() {
return;
}
time(sess, "persist query result cache", || {
save_in(sess,
query_cache_path(sess),
|e| encode_query_cache(tcx, e));
});
if tcx.sess.opts.debugging_opts.incremental_queries {
time(sess, "persist dep-graph", || {
save_in(sess,
dep_graph_path(sess),
|e| encode_dep_graph(tcx, e));
});
}
dirty_clean::check_dirty_clean_annotations(tcx);
})
}
pub fn save_work_products(sess: &Session, dep_graph: &DepGraph) {
if sess.opts.incremental.is_none() {
return;
}
debug!("save_work_products()");
dep_graph.assert_ignored();
let path = work_products_path(sess);
save_in(sess, path, |e| encode_work_products(dep_graph, e));
let new_work_products = dep_graph.work_products();
let previous_work_products = dep_graph.previous_work_products();
for (id, wp) in previous_work_products.iter() {
if !new_work_products.contains_key(id) {
work_product::delete_workproduct_files(sess, wp);
debug_assert!(wp.saved_files.iter().all(|&(_, ref file_name)| {
!in_incr_comp_dir_sess(sess, file_name).exists()
}));
}
}
debug_assert!({
new_work_products.iter()
.flat_map(|(_, wp)| wp.saved_files
.iter()
.map(|&(_, ref name)| name))
.map(|name| in_incr_comp_dir_sess(sess, name))
.all(|path| path.exists())
});
}
fn save_in<F>(sess: &Session, path_buf: PathBuf, encode: F)
where F: FnOnce(&mut Encoder) -> io::Result<()>
{
debug!("save: storing data in {}", path_buf.display());
if path_buf.exists() {
match fs::remove_file(&path_buf) {
Ok(()) => {
debug!("save: remove old file");
}
Err(err) => {
sess.err(&format!("unable to delete old dep-graph at `{}`: {}",
path_buf.display(),
err));
return;
}
}
}
let mut wr = Cursor::new(Vec::new());
file_format::write_file_header(&mut wr).unwrap();
match encode(&mut Encoder::new(&mut wr)) {
Ok(()) => {}
Err(err) => {
sess.err(&format!("could not encode dep-graph to `{}`: {}",
path_buf.display(),
err));
return;
}
}
let data = wr.into_inner();
match fs::write(&path_buf, data) {
Ok(_) => {
debug!("save: data written to disk successfully");
}
Err(err) => {
sess.err(&format!("failed to write dep-graph to `{}`: {}",
path_buf.display(),
err));
return;
}
}
}
fn encode_dep_graph(tcx: TyCtxt,
encoder: &mut Encoder)
-> io::Result<()> {
tcx.sess.opts.dep_tracking_hash().encode(encoder)?;
let serialized_graph = tcx.dep_graph.serialize();
if tcx.sess.opts.debugging_opts.incremental_info {
#[derive(Clone)]
struct Stat {
kind: DepKind,
node_counter: u64,
edge_counter: u64,
}
let total_node_count = serialized_graph.nodes.len();
let total_edge_count = serialized_graph.edge_list_data.len();
let (total_edge_reads, total_duplicate_edge_reads) =
tcx.dep_graph.edge_deduplication_data();
let mut counts: FxHashMap<_, Stat> = FxHashMap();
for (i, &node) in serialized_graph.nodes.iter_enumerated() {
let stat = counts.entry(node.kind).or_insert(Stat {
kind: node.kind,
node_counter: 0,
edge_counter: 0,
});
stat.node_counter += 1;
let (edge_start, edge_end) = serialized_graph.edge_list_indices[i];
stat.edge_counter += (edge_end - edge_start) as u64;
}
let mut counts: Vec<_> = counts.values().cloned().collect();
counts.sort_by_key(|s| -(s.node_counter as i64));
let percentage_of_all_nodes: Vec<f64> = counts.iter().map(|s| {
(100.0 * (s.node_counter as f64)) / (total_node_count as f64)
}).collect();
let average_edges_per_kind: Vec<f64> = counts.iter().map(|s| {
(s.edge_counter as f64) / (s.node_counter as f64)
}).collect();
println!("[incremental]");
println!("[incremental] DepGraph Statistics");
const SEPARATOR: &str = "[incremental] --------------------------------\
----------------------------------------------\
------------";
println!("{}", SEPARATOR);
println!("[incremental]");
println!("[incremental] Total Node Count: {}", total_node_count);
println!("[incremental] Total Edge Count: {}", total_edge_count);
println!("[incremental] Total Edge Reads: {}", total_edge_reads);
println!("[incremental] Total Duplicate Edge Reads: {}", total_duplicate_edge_reads);
println!("[incremental]");
println!("[incremental] {:<36}| {:<17}| {:<12}| {:<17}|",
"Node Kind",
"Node Frequency",
"Node Count",
"Avg. Edge Count");
println!("[incremental] -------------------------------------\
|------------------\
|-------------\
|------------------|");
for (i, stat) in counts.iter().enumerate() {
println!("[incremental] {:<36}|{:>16.1}% |{:>12} |{:>17.1} |",
format!("{:?}", stat.kind),
percentage_of_all_nodes[i],
stat.node_counter,
average_edges_per_kind[i]);
}
println!("{}", SEPARATOR);
println!("[incremental]");
}
serialized_graph.encode(encoder)?;
Ok(())
}
fn encode_work_products(dep_graph: &DepGraph,
encoder: &mut Encoder) -> io::Result<()> {
let work_products: Vec<_> = dep_graph
.work_products()
.iter()
.map(|(id, work_product)| {
SerializedWorkProduct {
id: id.clone(),
work_product: work_product.clone(),
}
})
.collect();
work_products.encode(encoder)
}
fn encode_query_cache(tcx: TyCtxt,
encoder: &mut Encoder)
-> io::Result<()> {
tcx.serialize_query_result_cache(encoder)
}