Use jemalloc-sys on Linux and OSX compilers

This commit adds opt-in support to the compiler to link to `jemalloc` in
the compiler. When activated the compiler will depend on `jemalloc-sys`,
instruct jemalloc to unprefix its symbols, and then link to it. The
feature is activated by default on Linux/OSX compilers for x86_64/i686
platforms, and it's not enabled anywhere else for now. We may be able to
opt-in other platforms in the future! Also note that the opt-in only
happens on CI, it's otherwise unconditionally turned off by default.

Closes rust-lang#36963

Author: alexcrichton

.travis.yml

@@ -30,7 +30,7 @@ matrix:
 
     - env: >
         RUST_CHECK_TARGET=dist
-        RUST_CONFIGURE_ARGS="--enable-extended --enable-profiler --enable-lldb"
+        RUST_CONFIGURE_ARGS="--enable-extended --enable-profiler --enable-lldb --set rust.jemalloc"
         SRC=.
         DEPLOY_ALT=1
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
@@ -53,7 +53,7 @@ matrix:
     # version that we're using, 8.2, cannot compile LLVM for OSX 10.7.
     - env: >
         RUST_CHECK_TARGET=check
-        RUST_CONFIGURE_ARGS="--build=x86_64-apple-darwin --enable-sanitizers --enable-profiler"
+        RUST_CONFIGURE_ARGS="--build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc"
         SRC=.
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
         MACOSX_DEPLOYMENT_TARGET=10.8
@@ -67,7 +67,7 @@ matrix:
 
     - env: >
         RUST_CHECK_TARGET=check
-        RUST_CONFIGURE_ARGS=--build=i686-apple-darwin
+        RUST_CONFIGURE_ARGS="--build=i686-apple-darwin --set rust.jemalloc"
         SRC=.
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
         MACOSX_DEPLOYMENT_TARGET=10.8
@@ -87,7 +87,7 @@ matrix:
     # OSX 10.7 and `xcode7` is the latest Xcode able to compile LLVM for 10.7.
     - env: >
         RUST_CHECK_TARGET=dist
-        RUST_CONFIGURE_ARGS="--build=i686-apple-darwin --enable-full-tools --enable-profiler --enable-lldb"
+        RUST_CONFIGURE_ARGS="--build=i686-apple-darwin --enable-full-tools --enable-profiler --enable-lldb --set rust.jemalloc"
         SRC=.
         DEPLOY=1
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
@@ -102,7 +102,7 @@ matrix:
 
     - env: >
         RUST_CHECK_TARGET=dist
-        RUST_CONFIGURE_ARGS="--target=aarch64-apple-ios,armv7-apple-ios,armv7s-apple-ios,i386-apple-ios,x86_64-apple-ios --enable-full-tools --enable-sanitizers --enable-profiler --enable-lldb"
+        RUST_CONFIGURE_ARGS="--target=aarch64-apple-ios,armv7-apple-ios,armv7s-apple-ios,i386-apple-ios,x86_64-apple-ios --enable-full-tools --enable-sanitizers --enable-profiler --enable-lldb --set rust.jemalloc"
         SRC=.
         DEPLOY=1
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1

config.toml.example

@@ -392,6 +392,10 @@
 # generally only set for releases
 #remap-debuginfo = false
 
+# Link the compiler against `jemalloc`, where on Linux and OSX it should
+# override the default allocator for rustc and LLVM.
+#jemalloc = false
+
 # =============================================================================
 # Options for specific targets
 #

src/Cargo.lock

@@ -772,6 +772,11 @@ dependencies = [
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "fs_extra"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "fst"
 version = "0.3.0"
@@ -983,6 +988,16 @@ name = "itoa"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "jemalloc-sys"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fs_extra 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "jobserver"
 version = "0.1.11"
@@ -2168,6 +2183,7 @@ dependencies = [
  "arena 0.0.0",
  "env_logger 0.5.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "graphviz 0.0.0",
+ "jemalloc-sys 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc 0.0.0",
  "rustc-rayon 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3223,6 +3239,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
 "checksum foreign-types-shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
 "checksum fs2 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9564fc758e15025b46aa6643b1b77d047d1a56a1aea6e01002ac0c7026876213"
+"checksum fs_extra 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5f2a4a2034423744d2cc7ca2068453168dcdb82c438419e639a26bd87839c674"
 "checksum fst 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d94485a00b1827b861dd9d1a2cc9764f9044d4c535514c0760a5a2012ef3399f"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
@@ -3245,6 +3262,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum is-match 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7e5b386aef33a1c677be65237cb9d32c3f3ef56bd035949710c4bb13083eb053"
 "checksum itertools 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)" = "f58856976b776fedd95533137617a02fb25719f40e7d9b01c7043cd65474f450"
 "checksum itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
+"checksum jemalloc-sys 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "bfc62c8e50e381768ce8ee0428ee53741929f7ebd73e4d83f669bcf7693e00ae"
 "checksum jobserver 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "60af5f849e1981434e4a31d3d782c4774ae9b434ce55b101a96ecfd09147e8be"
 "checksum json 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)" = "9ad0485404155f45cce53a40d4b2d6ac356418300daed05273d9e26f91c390be"
 "checksum jsonrpc-core 8.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ddf83704f4e79979a424d1082dd2c1e52683058056c9280efa19ac5f6bc9033c"

src/bootstrap/config.rs

@@ -115,6 +115,7 @@ pub struct Config {
     pub hosts: Vec<Interned<String>>,
     pub targets: Vec<Interned<String>>,
     pub local_rebuild: bool,
+    pub jemalloc: bool,
 
     // dist misc
     pub dist_sign_folder: Option<PathBuf>,
@@ -259,7 +260,7 @@ struct Llvm {
     link_jobs: Option<u32>,
     link_shared: Option<bool>,
     version_suffix: Option<String>,
-    clang_cl: Option<String>
+    clang_cl: Option<String>,
 }
 
 #[derive(Deserialize, Default, Clone)]
@@ -322,6 +323,7 @@ struct Rust {
     backtrace_on_ice: Option<bool>,
     verify_llvm_ir: Option<bool>,
     remap_debuginfo: Option<bool>,
+    jemalloc: Option<bool>,
 }
 
 /// TOML representation of how each build target is configured.
@@ -535,6 +537,7 @@ impl Config {
             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);
             set(&mut config.backtrace, rust.backtrace);
             set(&mut config.channel, rust.channel.clone());
             set(&mut config.rust_dist_src, rust.dist_src);

src/bootstrap/lib.rs

@@ -530,7 +530,11 @@ impl Build {
 
     /// Get the space-separated set of activated features for the compiler.
     fn rustc_features(&self) -> String {
-        String::new()
+        let mut features = String::new();
+        if self.config.jemalloc {
+            features.push_str("jemalloc");
+        }
+        features
     }
 
     /// Component directory that Cargo will produce output into (e.g.

src/ci/docker/dist-i686-linux/Dockerfile

@@ -98,7 +98,8 @@ ENV RUST_CONFIGURE_ARGS \
       --enable-sanitizers \
       --enable-profiler \
       --set target.i686-unknown-linux-gnu.linker=clang \
-      --build=i686-unknown-linux-gnu
+      --build=i686-unknown-linux-gnu \
+      --set rust.jemalloc
 ENV SCRIPT python2.7 ../x.py dist --build $HOSTS --host $HOSTS --target $HOSTS
 ENV CARGO_TARGET_I686_UNKNOWN_LINUX_GNU_LINKER=clang
 

src/ci/docker/dist-x86_64-linux/Dockerfile

@@ -101,7 +101,8 @@ ENV RUST_CONFIGURE_ARGS \
       --set target.x86_64-unknown-linux-gnu.linker=clang \
       --set target.x86_64-unknown-linux-gnu.ar=/rustroot/bin/llvm-ar \
       --set target.x86_64-unknown-linux-gnu.ranlib=/rustroot/bin/llvm-ranlib \
-      --set llvm.thin-lto=true
+      --set llvm.thin-lto=true \
+      --set rust.jemalloc
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS
 ENV CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=clang
 

src/librustc_driver/Cargo.toml

@@ -38,3 +38,8 @@ syntax = { path = "../libsyntax" }
 smallvec = { version = "0.6.5", features = ["union"] }
 syntax_ext = { path = "../libsyntax_ext" }
 syntax_pos = { path = "../libsyntax_pos" }
+
+[dependencies.jemalloc-sys]
+version = '0.1.8'
+optional = true
+features = ['unprefixed_malloc_on_supported_platforms']

src/librustc_driver/lib.rs

@@ -64,6 +64,14 @@ extern crate syntax;
 extern crate syntax_ext;
 extern crate syntax_pos;
 
+// Note that the linkage here should be all that we need, on Linux we're not
+// prefixing the symbols here so this should naturally override our default
+// allocator. On OSX it should override via the zone allocator. We shouldn't
+// enable this by default on other platforms, so other platforms aren't handled
+// here yet.
+#[cfg(feature = "jemalloc-sys")]
+extern crate jemalloc_sys;
+
 use driver::CompileController;
 use pretty::{PpMode, UserIdentifiedItem};
 

src/rustc/Cargo.toml

@@ -10,3 +10,6 @@ path = "rustc.rs"
 [dependencies]
 rustc_target = { path = "../librustc_target" }
 rustc_driver = { path = "../librustc_driver" }
+
+[features]
+jemalloc = ['rustc_driver/jemalloc-sys']