Add env var for specifying custom BDWGC path

Cargo.lock

@@ -57,7 +57,7 @@ dependencies = [
 name = "alloc"
 version = "0.0.0"
 dependencies = [
- "boehm",
+ "bdwgc",
  "compiler_builtins",
  "core",
  "rand",
@@ -305,7 +305,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "boehm"
+name = "bdwgc"
 version = "0.1.0"
 dependencies = [
  "cmake",
@@ -5010,7 +5010,7 @@ version = "0.0.0"
 dependencies = [
  "addr2line",
  "alloc",
- "boehm",
+ "bdwgc",
  "cfg-if",
  "compiler_builtins",
  "core",

library/alloc/Cargo.toml

@@ -9,7 +9,7 @@ autobenches = false
 edition = "2021"
 
 [dependencies]
-boehm = { path = "../boehm"}
+bdwgc = { path = "../bdwgc"}
 core = { path = "../core" }
 compiler_builtins = { version = "0.1.40", features = ['rustc-dep-of-std'] }
 

library/alloc/src/gc.rs

@@ -54,14 +54,14 @@ unsafe impl GlobalAlloc for GcAllocator {
 #[inline]
 unsafe fn gc_malloc(layout: Layout) -> *mut u8 {
     if layout.align() <= MIN_ALIGN && layout.align() <= layout.size() {
-        unsafe { boehm::GC_malloc(layout.size()) as *mut u8 }
+        unsafe { bdwgc::GC_malloc(layout.size()) as *mut u8 }
     } else {
         let mut out = ptr::null_mut();
         // posix_memalign requires that the alignment be a multiple of `sizeof(void*)`.
         // Since these are all powers of 2, we can just use max.
         unsafe {
             let align = layout.align().max(core::mem::size_of::<usize>());
-            let ret = boehm::GC_posix_memalign(&mut out, align, layout.size());
+            let ret = bdwgc::GC_posix_memalign(&mut out, align, layout.size());
             if ret != 0 { ptr::null_mut() } else { out as *mut u8 }
         }
     }
@@ -70,7 +70,7 @@ unsafe fn gc_malloc(layout: Layout) -> *mut u8 {
 #[inline]
 unsafe fn gc_realloc(ptr: *mut u8, old_layout: Layout, new_size: usize) -> *mut u8 {
     if old_layout.align() <= MIN_ALIGN && old_layout.align() <= new_size {
-        unsafe { boehm::GC_realloc(ptr, new_size) as *mut u8 }
+        unsafe { bdwgc::GC_realloc(ptr, new_size) as *mut u8 }
     } else {
         unsafe {
             let new_layout = Layout::from_size_align_unchecked(new_size, old_layout.align());
@@ -90,11 +90,11 @@ unsafe fn gc_realloc(ptr: *mut u8, old_layout: Layout, new_size: usize) -> *mut
 unsafe fn gc_free(ptr: *mut u8, layout: Layout) {
     if layout.align() <= MIN_ALIGN && layout.align() <= layout.size() {
         unsafe {
-            boehm::GC_free(ptr);
+            bdwgc::GC_free(ptr);
         }
     } else {
         unsafe {
-            boehm::GC_free(boehm::GC_base(ptr));
+            bdwgc::GC_free(bdwgc::GC_base(ptr));
         }
     }
 }
@@ -117,18 +117,18 @@ unsafe impl Allocator for GcAllocator {
 
 impl GcAllocator {
     pub fn force_gc() {
-        unsafe { boehm::GC_gcollect() }
+        unsafe { bdwgc::GC_gcollect() }
     }
 }
 
 pub fn init() {
-    unsafe { boehm::GC_init() }
+    unsafe { bdwgc::GC_init() }
 }
 
 pub fn suppress_warnings() {
-    unsafe { boehm::GC_set_warn_proc(&boehm::GC_ignore_warn_proc as *const _ as *mut u8) };
+    unsafe { bdwgc::GC_set_warn_proc(&bdwgc::GC_ignore_warn_proc as *const _ as *mut u8) };
 }
 
 pub fn thread_registered() -> bool {
-    unsafe { boehm::GC_thread_is_registered() != 0 }
+    unsafe { bdwgc::GC_thread_is_registered() != 0 }
 }

library/alloc/src/lib.rs

@@ -222,7 +222,7 @@ mod testing;
 #[allow(unused_extern_crates)]
 #[allow(missing_docs)]
 #[unstable(feature = "gc", issue = "none")]
-pub extern crate boehm;
+pub extern crate bdwgc;
 
 // Module with internal macros used by other modules (needs to be included before other modules).
 #[macro_use]

library/alloc/tests/gc.rs

@@ -28,7 +28,7 @@ fn large_alignment() {
 }
 
 #[test]
-fn boehm_issue_589() {
+fn bdwgc_issue_589() {
     // Test the specific size / alignment problem raised in [1].
     //
     // [1]: https://github.com/ivmai/bdwgc/issues/589

library/boehm/Cargo.toml → library/bdwgc/Cargo.toml

@@ -1,7 +1,7 @@
 cargo-features = ["public-dependency"]
 
 [package]
-name = "boehm"
+name = "bdwgc"
 version = "0.1.0"
 authors = ["Jake Hughes <jh@jakehughes.uk>"]
 edition = "2021"

library/boehm/build.rs → library/bdwgc/build.rs

@@ -3,10 +3,10 @@ use std::env;
 use std::path::PathBuf;
 use std::process::Command;
 
-const BOEHM_REPO: &str = "https://github.com/softdevteam/bdwgc.git";
-const BOEHM_ATOMICS_REPO: &str = "https://github.com/ivmai/libatomic_ops.git";
-const BOEHM_DIR: &str = "bdwgc";
-const BUILD_DIR: &str = "lib";
+const BDWGC_REPO: &str = "https://github.com/softdevteam/bdwgc.git";
+const BDWGC_ATOMICS_REPO: &str = "https://github.com/ivmai/libatomic_ops.git";
+const BDWGC_DEFAULT_SRC_DIR: &str = "bdwgc";
+const BDWGC_BUILD_DIR: &str = "lib";
 
 #[cfg(not(all(target_pointer_width = "64", target_arch = "x86_64")))]
 compile_error!("Requires x86_64 with 64 bit pointer width.");
@@ -24,17 +24,22 @@ where
 
 fn main() {
     let out_dir = env::var("OUT_DIR").unwrap();
-    let mut boehm_src = PathBuf::from(&out_dir);
-    boehm_src.push(BOEHM_DIR);
+    let mut bdwgc_src = PathBuf::from(&out_dir);
+
+    match env::var("BDWGC") {
+        Ok(path) => bdwgc_src.push(path),
+        Err(_) => bdwgc_src.push(BDWGC_DEFAULT_SRC_DIR),
+    }
+
     let mut build_dir = PathBuf::from(&out_dir);
-    build_dir.push(BUILD_DIR);
+    build_dir.push(BDWGC_BUILD_DIR);
 
-    if !boehm_src.exists() {
-        run("git", |cmd| cmd.arg("clone").arg(BOEHM_REPO).arg(&boehm_src));
-        run("git", |cmd| cmd.arg("clone").arg(BOEHM_ATOMICS_REPO).current_dir(&boehm_src));
+    if !bdwgc_src.exists() && env::var("BDWGC").is_err() {
+        run("git", |cmd| cmd.arg("clone").arg(BDWGC_REPO).arg(&bdwgc_src));
+        run("git", |cmd| cmd.arg("clone").arg(BDWGC_ATOMICS_REPO).current_dir(&bdwgc_src));
     }
 
-    let mut build = cmake::Config::new(&boehm_src);
+    let mut build = cmake::Config::new(&bdwgc_src);
     build
         .pic(true)
         .define("BUILD_SHARED_LIBS", "OFF")

library/std/Cargo.toml

@@ -14,7 +14,7 @@ crate-type = ["dylib", "rlib"]
 [dependencies]
 alloc = { path = "../alloc", public = true }
 cfg-if = { version = "1.0", features = ['rustc-dep-of-std'] }
-boehm = { path = "../boehm" }
+bdwgc = { path = "../bdwgc" }
 panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core", public = true }

library/std/src/gc.rs

@@ -267,7 +267,7 @@ impl<T> Gc<T> {
         }
 
         unsafe {
-            boehm::GC_register_finalizer_no_order(
+            bdwgc::GC_register_finalizer_no_order(
                 self.ptr.as_ptr() as *mut u8,
                 Some(finalizer::<T>),
                 null_mut(),
@@ -281,7 +281,7 @@ impl<T> Gc<T> {
     pub fn unregister_finalizer(&mut self) {
         let ptr = self.ptr.as_ptr() as *mut GcBox<T> as *mut u8;
         unsafe {
-            boehm::GC_register_finalizer(
+            bdwgc::GC_register_finalizer(
                 ptr,
                 None,
                 ::core::ptr::null_mut(),

library/std/src/sys/common/thread_local/os_local.rs

@@ -3,11 +3,11 @@ use crate::cell::Cell;
 use crate::sys_common::thread_local_key::StaticKey as OsStaticKey;
 use crate::{fmt, marker, panic, ptr};
 
-use alloc::boehm;
+use alloc::bdwgc;
 
 /// A buffer of pointers to each thread local variable.
 ///
-/// The Boehm GC can't locate GC pointers stored inside POSIX thread locals, so
+/// The BDWGC can't locate GC pointers stored inside POSIX thread locals, so
 /// this struct keeps track of pointers to thread local data, which the GC then
 /// uses as part of its marking rootset.
 ///
@@ -31,11 +31,11 @@ impl TLSRoots {
     /// Push a root to the current thread's TLS rootset. This lazily
     /// initialises the backing vector.
     fn push(root: *mut u8) {
-        let mut rootset = unsafe { boehm::GC_tls_rootset() as *mut Vec<*mut u8> };
+        let mut rootset = unsafe { bdwgc::GC_tls_rootset() as *mut Vec<*mut u8> };
         if rootset.is_null() {
             let v = Vec::new();
             let buf: *mut Vec<*mut u8> = Box::into_raw(Box::new(v));
-            unsafe { boehm::GC_init_tls_rootset(buf as *mut u8) };
+            unsafe { bdwgc::GC_init_tls_rootset(buf as *mut u8) };
             rootset = buf
         }
         unsafe { (&mut *rootset).push(root) };

library/std/src/sys/unix/thread.rs

@@ -85,7 +85,7 @@ impl Thread {
             };
         }
 
-        let ret = alloc::boehm::GC_pthread_create(&mut native, &attr, thread_start, p as *mut _);
+        let ret = alloc::bdwgc::GC_pthread_create(&mut native, &attr, thread_start, p as *mut _);
         // Note: if the thread creation fails and this assert fails, then p will
         // be leaked. However, an alternative design could cause double-free
         // which is clearly worse.
@@ -267,7 +267,7 @@ impl Thread {
 
     pub fn join(self) {
         unsafe {
-            let ret = alloc::boehm::GC_pthread_join(self.id, ptr::null_mut());
+            let ret = alloc::bdwgc::GC_pthread_join(self.id, ptr::null_mut());
             mem::forget(self);
             assert!(ret == 0, "failed to join thread: {}", io::Error::from_raw_os_error(ret));
         }
@@ -286,7 +286,7 @@ impl Thread {
 
 impl Drop for Thread {
     fn drop(&mut self) {
-        let ret = unsafe { alloc::boehm::GC_pthread_detach(self.id) };
+        let ret = unsafe { alloc::bdwgc::GC_pthread_detach(self.id) };
         debug_assert_eq!(ret, 0);
     }
 }

tests/ui/runtime/gc/thread_local.rs

@@ -1,4 +1,4 @@
-// ignore-test
+// run-pass
 // ignore-tidy-linelength
 // no-prefer-dynamic
 #![feature(allocator_api)]