Auto merge of #74876 - oli-obk:lumberjack_disable, r=RalfJung

Replace all uses of `log::log_enabled` with `Debug` printers

cc @RalfJung this touches a bunch of logging in the miri engine. There are some visual changes, mainly that in several cases we stop prepending lines with the module path and just have a newline.

src/librustc_interface/passes.rs

@@ -2,7 +2,7 @@ use crate::interface::{Compiler, Result};
 use crate::proc_macro_decls;
 use crate::util;
 
-use log::{info, log_enabled, warn};
+use log::{info, warn};
 use once_cell::sync::Lazy;
 use rustc_ast::mut_visit::MutVisitor;
 use rustc_ast::{self, ast, visit};
@@ -1015,21 +1015,15 @@ pub fn start_codegen<'tcx>(
     tcx: TyCtxt<'tcx>,
     outputs: &OutputFilenames,
 ) -> Box<dyn Any> {
-    if log_enabled!(::log::Level::Info) {
-        println!("Pre-codegen");
-        tcx.print_debug_stats();
-    }
+    info!("Pre-codegen\n{:?}", tcx.debug_stats());
 
     let (metadata, need_metadata_module) = encode_and_write_metadata(tcx, outputs);
 
     let codegen = tcx.sess.time("codegen_crate", move || {
         codegen_backend.codegen_crate(tcx, metadata, need_metadata_module)
     });
 
-    if log_enabled!(::log::Level::Info) {
-        println!("Post-codegen");
-        tcx.print_debug_stats();
-    }
+    info!("Post-codegen\n{:?}", tcx.debug_stats());
 
     if tcx.sess.opts.output_types.contains_key(&OutputType::Mir) {
         if let Err(e) = mir::transform::dump_mir::emit_mir(tcx, outputs) {

src/librustc_metadata/creader.rs

@@ -26,7 +26,7 @@ use rustc_span::symbol::{sym, Symbol};
 use rustc_span::{Span, DUMMY_SP};
 use rustc_target::spec::{PanicStrategy, TargetTriple};
 
-use log::{debug, info, log_enabled};
+use log::{debug, info};
 use proc_macro::bridge::client::ProcMacro;
 use std::path::Path;
 use std::{cmp, env, fs};
@@ -82,24 +82,36 @@ impl std::ops::Deref for CrateMetadataRef<'_> {
     }
 }
 
-fn dump_crates(cstore: &CStore) {
-    info!("resolved crates:");
-    cstore.iter_crate_data(|cnum, data| {
-        info!("  name: {}", data.name());
-        info!("  cnum: {}", cnum);
-        info!("  hash: {}", data.hash());
-        info!("  reqd: {:?}", data.dep_kind());
-        let CrateSource { dylib, rlib, rmeta } = data.source();
-        if let Some(dylib) = dylib {
-            info!("  dylib: {}", dylib.0.display());
-        }
-        if let Some(rlib) = rlib {
-            info!("   rlib: {}", rlib.0.display());
-        }
-        if let Some(rmeta) = rmeta {
-            info!("   rmeta: {}", rmeta.0.display());
-        }
-    });
+struct CrateDump<'a>(&'a CStore);
+
+impl<'a> std::fmt::Debug for CrateDump<'a> {
+    fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        writeln!(fmt, "resolved crates:")?;
+        // `iter_crate_data` does not allow returning values. Thus we use a mutable variable here
+        // that aggregates the value (and any errors that could happen).
+        let mut res = Ok(());
+        self.0.iter_crate_data(|cnum, data| {
+            res = res.and(
+                try {
+                    writeln!(fmt, "  name: {}", data.name())?;
+                    writeln!(fmt, "  cnum: {}", cnum)?;
+                    writeln!(fmt, "  hash: {}", data.hash())?;
+                    writeln!(fmt, "  reqd: {:?}", data.dep_kind())?;
+                    let CrateSource { dylib, rlib, rmeta } = data.source();
+                    if let Some(dylib) = dylib {
+                        writeln!(fmt, "  dylib: {}", dylib.0.display())?;
+                    }
+                    if let Some(rlib) = rlib {
+                        writeln!(fmt, "   rlib: {}", rlib.0.display())?;
+                    }
+                    if let Some(rmeta) = rmeta {
+                        writeln!(fmt, "   rmeta: {}", rmeta.0.display())?;
+                    }
+                },
+            );
+        });
+        res
+    }
 }
 
 impl CStore {
@@ -864,9 +876,7 @@ impl<'a> CrateLoader<'a> {
         self.inject_allocator_crate(krate);
         self.inject_panic_runtime(krate);
 
-        if log_enabled!(log::Level::Info) {
-            dump_crates(&self.cstore);
-        }
+        info!("{:?}", CrateDump(&self.cstore));
 
         self.report_unused_deps(krate);
     }

src/librustc_metadata/lib.rs

@@ -9,6 +9,7 @@
 #![feature(proc_macro_internals)]
 #![feature(min_specialization)]
 #![feature(stmt_expr_attributes)]
+#![feature(try_blocks)]
 #![feature(never_type)]
 #![recursion_limit = "256"]
 

src/librustc_middle/ty/context.rs

@@ -1831,7 +1831,7 @@ pub mod tls {
 }
 
 macro_rules! sty_debug_print {
-    ($ctxt: expr, $($variant: ident),*) => {{
+    ($fmt: expr, $ctxt: expr, $($variant: ident),*) => {{
         // Curious inner module to allow variant names to be used as
         // variable names.
         #[allow(non_snake_case)]
@@ -1848,7 +1848,7 @@ macro_rules! sty_debug_print {
                 all_infer: usize,
             }
 
-            pub fn go(tcx: TyCtxt<'_>) {
+            pub fn go(fmt: &mut std::fmt::Formatter<'_>, tcx: TyCtxt<'_>) -> std::fmt::Result {
                 let mut total = DebugStat {
                     total: 0,
                     lt_infer: 0,
@@ -1878,18 +1878,18 @@ macro_rules! sty_debug_print {
                     if ct { total.ct_infer += 1; variant.ct_infer += 1 }
                     if lt && ty && ct { total.all_infer += 1; variant.all_infer += 1 }
                 }
-                println!("Ty interner             total           ty lt ct all");
-                $(println!("    {:18}: {uses:6} {usespc:4.1}%, \
+                writeln!(fmt, "Ty interner             total           ty lt ct all")?;
+                $(writeln!(fmt, "    {:18}: {uses:6} {usespc:4.1}%, \
                             {ty:4.1}% {lt:5.1}% {ct:4.1}% {all:4.1}%",
                     stringify!($variant),
                     uses = $variant.total,
                     usespc = $variant.total as f64 * 100.0 / total.total as f64,
                     ty = $variant.ty_infer as f64 * 100.0  / total.total as f64,
                     lt = $variant.lt_infer as f64 * 100.0  / total.total as f64,
                     ct = $variant.ct_infer as f64 * 100.0  / total.total as f64,
-                    all = $variant.all_infer as f64 * 100.0  / total.total as f64);
+                    all = $variant.all_infer as f64 * 100.0  / total.total as f64)?;
                 )*
-                println!("                  total {uses:6}        \
+                writeln!(fmt, "                  total {uses:6}        \
                           {ty:4.1}% {lt:5.1}% {ct:4.1}% {all:4.1}%",
                     uses = total.total,
                     ty = total.ty_infer as f64 * 100.0  / total.total as f64,
@@ -1899,41 +1899,56 @@ macro_rules! sty_debug_print {
             }
         }
 
-        inner::go($ctxt)
+        inner::go($fmt, $ctxt)
     }}
 }
 
 impl<'tcx> TyCtxt<'tcx> {
-    pub fn print_debug_stats(self) {
-        sty_debug_print!(
-            self,
-            Adt,
-            Array,
-            Slice,
-            RawPtr,
-            Ref,
-            FnDef,
-            FnPtr,
-            Placeholder,
-            Generator,
-            GeneratorWitness,
-            Dynamic,
-            Closure,
-            Tuple,
-            Bound,
-            Param,
-            Infer,
-            Projection,
-            Opaque,
-            Foreign
-        );
-
-        println!("InternalSubsts interner: #{}", self.interners.substs.len());
-        println!("Region interner: #{}", self.interners.region.len());
-        println!("Stability interner: #{}", self.stability_interner.len());
-        println!("Const Stability interner: #{}", self.const_stability_interner.len());
-        println!("Allocation interner: #{}", self.allocation_interner.len());
-        println!("Layout interner: #{}", self.layout_interner.len());
+    pub fn debug_stats(self) -> impl std::fmt::Debug + 'tcx {
+        struct DebugStats<'tcx>(TyCtxt<'tcx>);
+
+        impl std::fmt::Debug for DebugStats<'tcx> {
+            fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                sty_debug_print!(
+                    fmt,
+                    self.0,
+                    Adt,
+                    Array,
+                    Slice,
+                    RawPtr,
+                    Ref,
+                    FnDef,
+                    FnPtr,
+                    Placeholder,
+                    Generator,
+                    GeneratorWitness,
+                    Dynamic,
+                    Closure,
+                    Tuple,
+                    Bound,
+                    Param,
+                    Infer,
+                    Projection,
+                    Opaque,
+                    Foreign
+                )?;
+
+                writeln!(fmt, "InternalSubsts interner: #{}", self.0.interners.substs.len())?;
+                writeln!(fmt, "Region interner: #{}", self.0.interners.region.len())?;
+                writeln!(fmt, "Stability interner: #{}", self.0.stability_interner.len())?;
+                writeln!(
+                    fmt,
+                    "Const Stability interner: #{}",
+                    self.0.const_stability_interner.len()
+                )?;
+                writeln!(fmt, "Allocation interner: #{}", self.0.allocation_interner.len())?;
+                writeln!(fmt, "Layout interner: #{}", self.0.layout_interner.len())?;
+
+                Ok(())
+            }
+        }
+
+        DebugStats(self)
     }
 }
 

src/librustc_mir/const_eval/machine.rs

@@ -56,7 +56,7 @@ impl<'mir, 'tcx> InterpCx<'mir, 'tcx, CompileTimeInterpreter<'mir, 'tcx>> {
         self.copy_op(place.into(), dest)?;
 
         self.return_to_block(ret.map(|r| r.1))?;
-        self.dump_place(*dest);
+        trace!("{:?}", self.dump_place(*dest));
         Ok(true)
     }