Preliminary wasm32 support

mk/cfg/wasm32-unknown-emscripten.mk

@@ -0,0 +1,24 @@
+# wasm32-unknown-emscripten configuration
+CC_wasm32-unknown-emscripten=emcc
+CXX_wasm32-unknown-emscripten=em++
+CPP_wasm32-unknown-emscripten=$(CPP)
+AR_wasm32-unknown-emscripten=emar
+CFG_LIB_NAME_wasm32-unknown-emscripten=lib$(1).so
+CFG_STATIC_LIB_NAME_wasm32-unknown-emscripten=lib$(1).a
+CFG_LIB_GLOB_wasm32-unknown-emscripten=lib$(1)-*.so
+CFG_LIB_DSYM_GLOB_wasm32-unknown-emscripten=lib$(1)-*.dylib.dSYM
+CFG_JEMALLOC_CFLAGS_wasm32-unknown-emscripten := -m32 $(CFLAGS)
+CFG_GCCISH_CFLAGS_wasm32-unknown-emscripten :=  -g -fPIC -m32 -s BINARYEN=1 $(CFLAGS)
+CFG_GCCISH_CXXFLAGS_wasm32-unknown-emscripten := -fno-rtti -s BINARYEN=1 $(CXXFLAGS)
+CFG_GCCISH_LINK_FLAGS_wasm32-unknown-emscripten := -shared -fPIC -ldl -pthread  -lrt -g -m32 -s BINARYEN=1
+CFG_GCCISH_DEF_FLAG_wasm32-unknown-emscripten := -Wl,--export-dynamic,--dynamic-list=
+CFG_LLC_FLAGS_wasm32-unknown-emscripten :=
+CFG_INSTALL_NAME_wasm32-unknown-emscripten =
+CFG_EXE_SUFFIX_wasm32-unknown-emscripten =
+CFG_WINDOWSY_wasm32-unknown-emscripten :=
+CFG_UNIXY_wasm32-unknown-emscripten := 1
+CFG_LDPATH_wasm32-unknown-emscripten :=
+CFG_RUN_wasm32-unknown-emscripten=$(2)
+CFG_RUN_TARG_wasm32-unknown-emscripten=$(call CFG_RUN_wasm32-unknown-emscripten,,$(2))
+CFG_GNU_TRIPLE_wasm32-unknown-emscripten := wasm32-unknown-emscripten
+CFG_DISABLE_JEMALLOC_wasm32-unknown-emscripten := 1

src/bootstrap/check.rs

@@ -323,9 +323,9 @@ pub fn krate(build: &Build,
     if target.contains("android") {
         build.run(cargo.arg("--no-run"));
         krate_android(build, compiler, target, mode);
-    } else if target.contains("asmjs") {
+    } else if target.contains("emscripten") {
         build.run(cargo.arg("--no-run"));
-        krate_asmjs(build, compiler, target, mode);
+        krate_emscripten(build, compiler, target, mode);
     } else {
         cargo.args(&build.flags.args);
         build.run(&mut cargo);
@@ -374,10 +374,10 @@ fn krate_android(build: &Build,
     }
 }
 
-fn krate_asmjs(build: &Build,
-                 compiler: &Compiler,
-                 target: &str,
-                 mode: Mode) {
+fn krate_emscripten(build: &Build,
+                    compiler: &Compiler,
+                    target: &str,
+                    mode: Mode) {
      let mut tests = Vec::new();
      let out_dir = build.cargo_out(compiler, mode, target);
      find_tests(&out_dir, target, &mut tests);

src/liballoc_system/lib.rs

@@ -29,7 +29,8 @@
               target_arch = "mips",
               target_arch = "powerpc",
               target_arch = "powerpc64",
-              target_arch = "asmjs")))]
+              target_arch = "asmjs",
+              target_arch = "wasm32")))]
 const MIN_ALIGN: usize = 8;
 #[cfg(all(any(target_arch = "x86_64",
               target_arch = "aarch64",

src/libpanic_unwind/gcc.rs

@@ -139,6 +139,10 @@ const UNWIND_DATA_REG: (i32, i32) = (6, 7); // R6, R7
 #[cfg(target_arch = "asmjs")]
 const UNWIND_DATA_REG: (i32, i32) = (0, 2); // EAX, EDX
 
+// FIXME: Ditto the above
+#[cfg(target_arch = "wasm32")]
+const UNWIND_DATA_REG: (i32, i32) = (0, 2); // EAX, EDX
+
 // The following code is based on GCC's C and C++ personality routines.  For reference, see:
 // https://github.com/gcc-mirror/gcc/blob/master/libstdc++-v3/libsupc++/eh_personality.cc
 // https://github.com/gcc-mirror/gcc/blob/trunk/libgcc/unwind-c.c

src/librustc_back/target/mod.rs

@@ -190,7 +190,8 @@ supported_targets! {
     ("i586-pc-windows-msvc", i586_pc_windows_msvc),
 
     ("le32-unknown-nacl", le32_unknown_nacl),
-    ("asmjs-unknown-emscripten", asmjs_unknown_emscripten)
+    ("asmjs-unknown-emscripten", asmjs_unknown_emscripten),
+    ("wasm32-unknown-emscripten", wasm32_unknown_emscripten)
 }
 
 /// Everything `rustc` knows about how to compile for a specific target.

src/librustc_back/target/wasm32_unknown_emscripten.rs

@@ -0,0 +1,41 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use super::{Target, TargetOptions};
+
+pub fn target() -> Result<Target, String> {
+    let opts = TargetOptions {
+        linker: "emcc".to_string(),
+        ar: "emar".to_string(),
+
+        dynamic_linking: false,
+        executables: true,
+        // Today emcc emits two files - a .js file to bootstrap and
+        // possibly interpret the wasm, and a .wasm file
+        exe_suffix: ".js".to_string(),
+        linker_is_gnu: true,
+        allow_asm: false,
+        obj_is_bitcode: true,
+        max_atomic_width: 32,
+        post_link_args: vec!["-s".to_string(), "BINARYEN=1".to_string()],
+        .. Default::default()
+    };
+    Ok(Target {
+        llvm_target: "asmjs-unknown-emscripten".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_os: "emscripten".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "unknown".to_string(),
+        data_layout: "e-p:32:32-i64:64-v128:32:128-n32-S128".to_string(),
+        arch: "wasm32".to_string(),
+        options: opts,
+    })
+}

src/librustc_trans/abi.rs

@@ -519,6 +519,7 @@ impl FnType {
             "powerpc64" => cabi_powerpc64::compute_abi_info(ccx, self),
             "s390x" => cabi_s390x::compute_abi_info(ccx, self),
             "asmjs" => cabi_asmjs::compute_abi_info(ccx, self),
+            "wasm32" => cabi_asmjs::compute_abi_info(ccx, self),
             a => ccx.sess().fatal(&format!("unrecognized arch \"{}\" in target specification", a))
         }
 

src/libstd/env.rs

@@ -892,7 +892,18 @@ mod os {
     pub const EXE_EXTENSION: &'static str = "pexe";
 }
 
-#[cfg(target_os = "emscripten")]
+#[cfg(all(target_os = "emscripten", target_arch = "asmjs"))]
+mod os {
+    pub const FAMILY: &'static str = "unix";
+    pub const OS: &'static str = "emscripten";
+    pub const DLL_PREFIX: &'static str = "lib";
+    pub const DLL_SUFFIX: &'static str = ".so";
+    pub const DLL_EXTENSION: &'static str = "so";
+    pub const EXE_SUFFIX: &'static str = ".js";
+    pub const EXE_EXTENSION: &'static str = "js";
+}
+
+#[cfg(all(target_os = "emscripten", target_arch = "wasm32"))]
 mod os {
     pub const FAMILY: &'static str = "unix";
     pub const OS: &'static str = "emscripten";
@@ -969,6 +980,11 @@ mod arch {
     pub const ARCH: &'static str = "asmjs";
 }
 
+#[cfg(target_arch = "wasm32")]
+mod arch {
+    pub const ARCH: &'static str = "wasm32";
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src/libstd/os/linux/raw.rs

@@ -34,7 +34,8 @@ pub use self::arch::{off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
           target_arch = "le32",
           target_arch = "powerpc",
           target_arch = "arm",
-          target_arch = "asmjs"))]
+          target_arch = "asmjs",
+          target_arch = "wasm32"))]
 mod arch {
     use os::raw::{c_long, c_short, c_uint};
 

src/libtest/lib.rs

@@ -1291,7 +1291,7 @@ impl MetricMap {
 ///
 /// This function is a no-op, and does not even read from `dummy`.
 #[cfg(not(any(all(target_os = "nacl", target_arch = "le32"),
-              target_arch = "asmjs")))]
+              target_arch = "asmjs", target_arch = "wasm32")))]
 pub fn black_box<T>(dummy: T) -> T {
     // we need to "use" the argument in some way LLVM can't
     // introspect.
@@ -1299,7 +1299,7 @@ pub fn black_box<T>(dummy: T) -> T {
     dummy
 }
 #[cfg(any(all(target_os = "nacl", target_arch = "le32"),
-          target_arch = "asmjs"))]
+          target_arch = "asmjs", target_arch = "wasm32"))]
 #[inline(never)]
 pub fn black_box<T>(dummy: T) -> T {
     dummy

src/libunwind/libunwind.rs

@@ -65,7 +65,7 @@ pub const unwinder_private_data_size: usize = 2;
 #[cfg(target_arch = "s390x")]
 pub const unwinder_private_data_size: usize = 2;
 
-#[cfg(target_arch = "asmjs")]
+#[cfg(any(target_arch = "asmjs", target_arch = "wasm32"))]
 pub const unwinder_private_data_size: usize = 20;
 
 #[repr(C)]

src/tools/compiletest/src/runtest.rs

@@ -1168,7 +1168,6 @@ actual:\n\
             "arm-linux-androideabi" | "armv7-linux-androideabi" | "aarch64-linux-android" => {
                 self._arm_exec_compiled_test(env)
             }
-
             _=> {
                 let aux_dir = self.aux_output_dir_name();
                 self.compose_and_run(self.make_run_args(),
@@ -1421,7 +1420,7 @@ actual:\n\
     fn make_exe_name(&self) -> PathBuf {
         let mut f = self.output_base_name();
         // FIXME: This is using the host architecture exe suffix, not target!
-        if self.config.target == "asmjs-unknown-emscripten" {
+        if self.config.target.contains("emscripten") {
             let mut fname = f.file_name().unwrap().to_os_string();
             fname.push(".js");
             f.set_file_name(&fname);
@@ -1439,8 +1438,8 @@ actual:\n\
         let mut args = self.split_maybe_args(&self.config.runtool);
 
         // If this is emscripten, then run tests under nodejs
-        if self.config.target == "asmjs-unknown-emscripten" {
-            args.push("nodejs".to_owned());
+        if self.config.target.contains("emscripten") {
+            args.push("node".to_owned());
         }
 
         let exe_file = self.make_exe_name();

src/tools/compiletest/src/util.rs

@@ -43,7 +43,8 @@ const ARCH_TABLE: &'static [(&'static str, &'static str)] = &[("aarch64", "aarch
                                                               ("sparc", "sparc"),
                                                               ("x86_64", "x86_64"),
                                                               ("xcore", "xcore"),
-                                                              ("asmjs", "asmjs")];
+                                                              ("asmjs", "asmjs"),
+                                                              ("wasm32", "wasm32")];
 
 pub fn get_os(triple: &str) -> &'static str {
     for &(triple_os, os) in OS_TABLE {