rustbuild: Simplify debuginfo configuration

config.toml.example

@@ -301,20 +301,27 @@
 # library.
 #debug-assertions = false
 
-# Whether or not debuginfo is emitted
-#debuginfo = false
+# Debuginfo level for most of Rust code, corresponds to the `-C debuginfo=N` option of `rustc`.
+# `0` - no debug info
+# `1` - line tables only
+# `2` - full debug info with variable and type information
+# Can be overriden for specific subsets of Rust code (rustc, std or tools).
+# Debuginfo for tests run with compiletest is not controlled by this option
+# and needs to be enabled separately with `debuginfo-level-tests`.
+#debuginfo-level = if debug { 2 } else { 0 }
 
-# Whether or not line number debug information is emitted
-#debuginfo-lines = false
+# Debuginfo level for the compiler.
+#debuginfo-level-rustc = debuginfo-level
 
-# Whether or not to only build debuginfo for the standard library if enabled.
-# If enabled, this will not compile the compiler with debuginfo, just the
-# standard library.
-#debuginfo-only-std = false
+# Debuginfo level for the standard library.
+#debuginfo-level-std = debuginfo-level
 
-# Enable debuginfo for the extended tools: cargo, rls, rustfmt
-# Adding debuginfo makes them several times larger.
-#debuginfo-tools = false
+# Debuginfo level for the tools.
+#debuginfo-level-tools = debuginfo-level
+
+# Debuginfo level for the test suites run with compiletest.
+# FIXME(#61117): Some tests fail when this option is enabled.
+#debuginfo-level-tests = 0
 
 # Whether or not `panic!`s generate backtraces (RUST_BACKTRACE)
 #backtrace = true
@@ -345,10 +352,8 @@
 # harness are debuggable just from logfiles.
 #verbose-tests = false
 
-# Flag indicating whether tests are compiled with optimizations (the -O flag) or
-# with debuginfo (the -g flag)
+# Flag indicating whether tests are compiled with optimizations (the -O flag).
 #optimize-tests = true
-#debuginfo-tests = true
 
 # Flag indicating whether codegen tests will be run or not. If you get an error
 # saying that the FileCheck executable is missing, you may want to disable this.

src/bootstrap/bin/rustc.rs

@@ -102,6 +102,10 @@ fn main() {
 
     cmd.env("RUSTC_BREAK_ON_ICE", "1");
 
+    if let Ok(debuginfo_level) = env::var("RUSTC_DEBUGINFO_LEVEL") {
+        cmd.arg(format!("-Cdebuginfo={}", debuginfo_level));
+    }
+
     if let Some(target) = target {
         // The stage0 compiler has a special sysroot distinct from what we
         // actually downloaded, so we just always pass the `--sysroot` option.
@@ -169,11 +173,6 @@ fn main() {
 
         // Set various options from config.toml to configure how we're building
         // code.
-        if env::var("RUSTC_DEBUGINFO") == Ok("true".to_string()) {
-            cmd.arg("-g");
-        } else if env::var("RUSTC_DEBUGINFO_LINES") == Ok("true".to_string()) {
-            cmd.arg("-Cdebuginfo=1");
-        }
         let debug_assertions = match env::var("RUSTC_DEBUG_ASSERTIONS") {
             Ok(s) => if s == "true" { "y" } else { "n" },
             Err(..) => "n",

src/bootstrap/builder.rs

@@ -970,22 +970,15 @@ impl<'a> Builder<'a> {
             cargo.env("RUSTDOC_LIBDIR", self.rustc_libdir(compiler));
         }
 
-        if mode.is_tool() {
-            // Tools like cargo and rls don't get debuginfo by default right now, but this can be
-            // enabled in the config.  Adding debuginfo makes them several times larger.
-            if self.config.rust_debuginfo_tools {
-                cargo.env("RUSTC_DEBUGINFO", self.config.rust_debuginfo.to_string());
-                cargo.env(
-                    "RUSTC_DEBUGINFO_LINES",
-                    self.config.rust_debuginfo_lines.to_string(),
-                );
-            }
-        } else {
-            cargo.env("RUSTC_DEBUGINFO", self.config.rust_debuginfo.to_string());
-            cargo.env(
-                "RUSTC_DEBUGINFO_LINES",
-                self.config.rust_debuginfo_lines.to_string(),
-            );
+        let debuginfo_level = match mode {
+            Mode::Rustc | Mode::Codegen => self.config.rust_debuginfo_level_rustc,
+            Mode::Std | Mode::Test => self.config.rust_debuginfo_level_std,
+            Mode::ToolBootstrap | Mode::ToolStd |
+            Mode::ToolTest | Mode::ToolRustc => self.config.rust_debuginfo_level_tools,
+        };
+        cargo.env("RUSTC_DEBUGINFO_LEVEL", debuginfo_level.to_string());
+
+        if !mode.is_tool() {
             cargo.env("RUSTC_FORCE_UNSTABLE", "1");
 
             // Currently the compiler depends on crates from crates.io, and

src/bootstrap/compile.rs

@@ -586,13 +586,6 @@ pub fn rustc_cargo_env(builder: &Builder<'_>, cargo: &mut Command) {
     let libdir_relative = builder.config.libdir_relative().unwrap_or(Path::new("lib"));
     cargo.env("CFG_LIBDIR_RELATIVE", libdir_relative);
 
-    // If we're not building a compiler with debugging information then remove
-    // these two env vars which would be set otherwise.
-    if builder.config.rust_debuginfo_only_std {
-        cargo.env_remove("RUSTC_DEBUGINFO");
-        cargo.env_remove("RUSTC_DEBUGINFO_LINES");
-    }
-
     if let Some(ref ver_date) = builder.rust_info.commit_date() {
         cargo.env("CFG_VER_DATE", ver_date);
     }

src/bootstrap/config.rs

@@ -96,15 +96,14 @@ pub struct Config {
     pub rust_codegen_units: Option<u32>,
     pub rust_codegen_units_std: Option<u32>,
     pub rust_debug_assertions: bool,
-    pub rust_debuginfo: bool,
-    pub rust_debuginfo_lines: bool,
-    pub rust_debuginfo_only_std: bool,
-    pub rust_debuginfo_tools: bool,
+    pub rust_debuginfo_level_rustc: u32,
+    pub rust_debuginfo_level_std: u32,
+    pub rust_debuginfo_level_tools: u32,
+    pub rust_debuginfo_level_tests: u32,
     pub rust_rpath: bool,
     pub rustc_parallel: bool,
     pub rustc_default_linker: Option<String>,
     pub rust_optimize_tests: bool,
-    pub rust_debuginfo_tests: bool,
     pub rust_dist_src: bool,
     pub rust_codegen_backends: Vec<Interned<String>>,
     pub rust_codegen_backends_dir: String,
@@ -300,18 +299,18 @@ struct Rust {
     codegen_units: Option<u32>,
     codegen_units_std: Option<u32>,
     debug_assertions: Option<bool>,
-    debuginfo: Option<bool>,
-    debuginfo_lines: Option<bool>,
-    debuginfo_only_std: Option<bool>,
-    debuginfo_tools: Option<bool>,
+    debuginfo_level: Option<u32>,
+    debuginfo_level_rustc: Option<u32>,
+    debuginfo_level_std: Option<u32>,
+    debuginfo_level_tools: Option<u32>,
+    debuginfo_level_tests: Option<u32>,
     parallel_compiler: Option<bool>,
     backtrace: Option<bool>,
     default_linker: Option<String>,
     channel: Option<String>,
     musl_root: Option<String>,
     rpath: Option<bool>,
     optimize_tests: Option<bool>,
-    debuginfo_tests: Option<bool>,
     codegen_tests: Option<bool>,
     ignore_git: Option<bool>,
     debug: Option<bool>,
@@ -495,12 +494,13 @@ impl Config {
         // Store off these values as options because if they're not provided
         // we'll infer default values for them later
         let mut llvm_assertions = None;
-        let mut debuginfo_lines = None;
-        let mut debuginfo_only_std = None;
-        let mut debuginfo_tools = None;
         let mut debug = None;
-        let mut debuginfo = None;
         let mut debug_assertions = None;
+        let mut debuginfo_level = None;
+        let mut debuginfo_level_rustc = None;
+        let mut debuginfo_level_std = None;
+        let mut debuginfo_level_tools = None;
+        let mut debuginfo_level_tests = None;
         let mut optimize = None;
         let mut ignore_git = None;
 
@@ -540,14 +540,14 @@ impl Config {
         if let Some(ref rust) = toml.rust {
             debug = rust.debug;
             debug_assertions = rust.debug_assertions;
-            debuginfo = rust.debuginfo;
-            debuginfo_lines = rust.debuginfo_lines;
-            debuginfo_only_std = rust.debuginfo_only_std;
-            debuginfo_tools = rust.debuginfo_tools;
+            debuginfo_level = rust.debuginfo_level;
+            debuginfo_level_rustc = rust.debuginfo_level_rustc;
+            debuginfo_level_std = rust.debuginfo_level_std;
+            debuginfo_level_tools = rust.debuginfo_level_tools;
+            debuginfo_level_tests = rust.debuginfo_level_tests;
             optimize = rust.optimize;
             ignore_git = rust.ignore_git;
             set(&mut config.rust_optimize_tests, rust.optimize_tests);
-            set(&mut config.rust_debuginfo_tests, rust.debuginfo_tests);
             set(&mut config.codegen_tests, rust.codegen_tests);
             set(&mut config.rust_rpath, rust.rpath);
             set(&mut config.jemalloc, rust.jemalloc);
@@ -639,18 +639,19 @@ impl Config {
         let default = true;
         config.rust_optimize = optimize.unwrap_or(default);
 
-        let default = match &config.channel[..] {
-            "stable" | "beta" | "nightly" => true,
-            _ => false,
-        };
-        config.rust_debuginfo_lines = debuginfo_lines.unwrap_or(default);
-        config.rust_debuginfo_only_std = debuginfo_only_std.unwrap_or(default);
-        config.rust_debuginfo_tools = debuginfo_tools.unwrap_or(false);
-
         let default = debug == Some(true);
-        config.rust_debuginfo = debuginfo.unwrap_or(default);
         config.rust_debug_assertions = debug_assertions.unwrap_or(default);
 
+        let with_defaults = |debuginfo_level_specific: Option<u32>| {
+            debuginfo_level_specific
+                .or(debuginfo_level)
+                .unwrap_or(if debug == Some(true) { 2 } else { 0 })
+        };
+        config.rust_debuginfo_level_rustc = with_defaults(debuginfo_level_rustc);
+        config.rust_debuginfo_level_std = with_defaults(debuginfo_level_std);
+        config.rust_debuginfo_level_tools = with_defaults(debuginfo_level_tools);
+        config.rust_debuginfo_level_tests = debuginfo_level_tests.unwrap_or(0);
+
         let default = config.channel == "dev";
         config.ignore_git = ignore_git.unwrap_or(default);
 

src/bootstrap/configure.py

@@ -37,7 +37,6 @@ def v(*args):
 o("optimize-tests", "rust.optimize-tests", "build tests with optimizations")
 o("parallel-compiler", "rust.parallel-compiler", "build a multi-threaded rustc")
 o("test-miri", "rust.test-miri", "run miri's test suite")
-o("debuginfo-tests", "rust.debuginfo-tests", "build tests with debugger metadata")
 o("verbose-tests", "rust.verbose-tests", "enable verbose output when running tests")
 o("ccache", "llvm.ccache", "invoke gcc/clang via ccache to reuse object files between builds")
 o("sccache", None, "invoke gcc/clang via sccache to reuse object files between builds")
@@ -77,10 +76,11 @@ def v(*args):
 o("llvm-assertions", "llvm.assertions", "build LLVM with assertions")
 o("debug-assertions", "rust.debug-assertions", "build with debugging assertions")
 o("llvm-release-debuginfo", "llvm.release-debuginfo", "build LLVM with debugger metadata")
-o("debuginfo", "rust.debuginfo", "build with debugger metadata")
-o("debuginfo-lines", "rust.debuginfo-lines", "build with line number debugger metadata")
-o("debuginfo-only-std", "rust.debuginfo-only-std", "build only libstd with debugging information")
-o("debuginfo-tools", "rust.debuginfo-tools", "build extended tools with debugging information")
+o("debuginfo-level", "rust.debuginfo-level", "debuginfo level for Rust code")
+o("debuginfo-level-rustc", "rust.debuginfo-level-rustc", "debuginfo level for the compiler")
+o("debuginfo-level-std", "rust.debuginfo-level-std", "debuginfo level for the standard library")
+o("debuginfo-level-tools", "rust.debuginfo-level-tools", "debuginfo level for the tools")
+o("debuginfo-level-tests", "rust.debuginfo-level-tests", "debuginfo level for the test suites run with compiletest")
 v("save-toolstates", "rust.save-toolstates", "save build and test status of external tools into this file")
 
 v("prefix", "install.prefix", "set installation prefix")

src/bootstrap/test.rs

@@ -1078,10 +1078,8 @@ impl Step for Compiletest {
             if builder.config.rust_optimize_tests {
                 flags.push("-O".to_string());
             }
-            if builder.config.rust_debuginfo_tests {
-                flags.push("-g".to_string());
-            }
         }
+        flags.push(format!("-Cdebuginfo={}", builder.config.rust_debuginfo_level_tests));
         flags.push("-Zunstable-options".to_string());
         flags.push(builder.config.cmd.rustc_args().join(" "));
 

src/bootstrap/tool.rs

@@ -485,10 +485,6 @@ impl Step for Rustdoc {
             &[],
         );
 
-        // Most tools don't get debuginfo, but rustdoc should.
-        cargo.env("RUSTC_DEBUGINFO", builder.config.rust_debuginfo.to_string())
-             .env("RUSTC_DEBUGINFO_LINES", builder.config.rust_debuginfo_lines.to_string());
-
         let _folder = builder.fold_output(|| format!("stage{}-rustdoc", target_compiler.stage));
         builder.info(&format!("Building rustdoc for stage{} ({})",
             target_compiler.stage, target_compiler.host));

src/ci/run.sh

@@ -48,6 +48,7 @@ if [ "$DEPLOY$DEPLOY_ALT" != "" ]; then
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --release-channel=$RUST_RELEASE_CHANNEL"
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-llvm-static-stdcpp"
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.remap-debuginfo"
+  RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.debuginfo-level-std=1"
 
   if [ "$NO_LLVM_ASSERTIONS" = "1" ]; then
     RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --disable-llvm-assertions"