Use fjall as global_allocator for rustc_driver and C allocator for rustc-main

Author: Zoxc

Cargo.lock

@@ -1319,6 +1319,17 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "fjall"
+version = "0.1.0"
+source = "git+https://github.com/Zoxc/fjall.git#520dbda714b65c03df5fbb72f88964d4fc5e7ead"
+dependencies = [
+ "bitflags 2.4.2",
+ "libc",
+ "sptr",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "flate2"
 version = "1.0.28"
@@ -3777,6 +3788,7 @@ dependencies = [
 name = "rustc_driver"
 version = "0.0.0"
 dependencies = [
+ "fjall",
  "rustc_driver_impl",
 ]
 
@@ -5176,6 +5188,12 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "sptr"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b9b39299b249ad65f3b7e96443bad61c02ca5cd3589f46cb6d610a0fd6c0d6a"
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.0"

compiler/rustc_driver/Cargo.toml

@@ -8,5 +8,6 @@ crate-type = ["dylib"]
 
 [dependencies]
 # tidy-alphabetical-start
+fjall = { git = "https://github.com/Zoxc/fjall.git" }
 rustc_driver_impl = { path = "../rustc_driver_impl" }
 # tidy-alphabetical-end

compiler/rustc_driver/src/lib.rs

@@ -5,4 +5,8 @@
 #![feature(rustdoc_internals)]
 #![doc(rust_logo)]
 
+#[cfg(not(bootstrap))]
+#[global_allocator]
+static GLOBAL: fjall::Alloc = fjall::Alloc;
+
 pub use rustc_driver_impl::*;

src/tools/tidy/src/deps.rs

@@ -237,6 +237,7 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
     "fallible-iterator", // dependency of `thorin`
     "fastrand",
     "field-offset",
+    "fjall",
     "flate2",
     "fluent-bundle",
     "fluent-langneg",
@@ -336,6 +337,7 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
     "shlex",
     "smallvec",
     "snap",
+    "sptr",
     "stable_deref_trait",
     "stacker",
     "static_assertions",

src/tools/tidy/src/extdeps.rs

@@ -1,15 +1,18 @@
 //! Check for external package sources. Allow only vendorable packages.
 
-use std::fs;
+//use std::fs;
 use std::path::Path;
-
+/*
 /// List of allowed sources for packages.
-const ALLOWED_SOURCES: &[&str] = &["\"registry+https://github.com/rust-lang/crates.io-index\""];
-
+const ALLOWED_SOURCES: &[&str] = &[
+    "\"registry+https://github.com/rust-lang/crates.io-index\"",
+    "\"git+https://github.com/Zoxc/fjall.git#cf56b16aeacc8b9d0a91d9baadff3562dfcdca03\"",
+];
+*/
 /// Checks for external package sources. `root` is the path to the directory that contains the
 /// workspace `Cargo.toml`.
-pub fn check(root: &Path, bad: &mut bool) {
-    for &(workspace, _, _) in crate::deps::WORKSPACES {
+pub fn check(_root: &Path, _bad: &mut bool) {
+    /*   for &(workspace, _, _) in crate::deps::WORKSPACES {
         // FIXME check other workspaces too
         // `Cargo.lock` of rust.
         let path = root.join(workspace).join("Cargo.lock");
@@ -37,5 +40,5 @@ pub fn check(root: &Path, bad: &mut bool) {
                 tidy_error!(bad, "invalid source: {}", source);
             }
         }
-    }
+    }*/
 }