Mount current directory to /home and Set CWD to /home when running WASI

.github/workflows/test.yaml

@@ -27,9 +27,9 @@ env:
   MSRV: "1.74"
   NEXTEST_PROFILE: "ci"
   RUSTUP_WINDOWS_PATH_ADD_BIN: 1
+  WASI_SDK_VERSION: "22"
 
 jobs:
-
   setup:
     name: Set up
     runs-on: ubuntu-22.04
@@ -144,6 +144,40 @@ jobs:
       #   run: |
       #     make test-js-core
 
+  test_wasix:
+    name: Test WASIX
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: ${{ env.MSRV }}
+      - name: Install Tools
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y git llvm clang make lld curl
+      - name: Build wasix sysroot
+        run: |
+          cd ~
+          git clone --recurse-submodules https://github.com/wasix-org/wasix-libc
+          cd wasix-libc
+          ./build32.sh
+          rm -rf /opt/wasix-sysroot
+          cp -r sysroot32 ~/wasix-sysroot
+      - name: Install wasi-sdk Tools
+        run: |
+          cd ~
+          curl -L "https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-${{ env.WASI_SDK_VERSION }}/wasi-sdk-${{ env.WASI_SDK_VERSION }}.0-linux.tar.gz" -o wasi-sdk.tar.gz
+          tar -xzf wasi-sdk.tar.gz
+          cp -r wasi-sdk-${{ env.WASI_SDK_VERSION }}.0 ~/wasi-sdk
+      - name: Install wasm-opt
+        run: |
+          sudo apt-get install -y binaryen
+      - name: make test-wasix
+        run: |
+          WASI_SDK=~/wasi-sdk WASIX_SYSROOT=~/wasix-sysroot make test-wasix
+
   test_wasm_build:
     name: Test wasm build
     runs-on: ubuntu-22.04

Makefile

@@ -632,6 +632,10 @@ test-wasi-fyi: build-wasmer
 	cd tests/wasi-fyi; \
 	./test.sh
 
+test-wasix: build-wasmer
+	cd tests/wasix; \
+	./test.sh
+
 test-integration-cli: build-wasmer build-capi package-capi-headless package distribution
 	cp ./dist/wasmer.tar.gz ./link.tar.gz
 	rustup target add wasm32-wasi

lib/cli/src/commands/run/mod.rs

@@ -395,12 +395,15 @@ impl Run {
 
         let mut runner = WasiRunner::new();
 
+        let (is_home_mapped, mapped_diretories) = self.wasi.build_mapped_directories()?;
+
         runner
             .with_args(&self.args)
             .with_injected_packages(packages)
             .with_envs(self.wasi.env_vars.clone())
             .with_mapped_host_commands(self.wasi.build_mapped_commands()?)
-            .with_mapped_directories(self.wasi.build_mapped_directories()?)
+            .with_mapped_directories(mapped_diretories)
+            .with_home_mapped(is_home_mapped)
             .with_forward_host_env(self.wasi.forward_host_env)
             .with_capabilities(self.wasi.capabilities());
 

lib/cli/src/commands/run/wasi.rs

@@ -26,6 +26,7 @@ use wasmer_wasix::{
     journal::{CompactingLogFileJournal, DynJournal},
     os::{tty_sys::SysTty, TtyBridge},
     rewind_ext,
+    runners::MAPPED_CURRENT_DIR_DEFAULT_PATH,
     runners::{MappedCommand, MappedDirectory},
     runtime::{
         module_cache::{FileSystemCache, ModuleCache},
@@ -180,8 +181,6 @@ pub struct RunProperties {
 
 #[allow(dead_code)]
 impl Wasi {
-    const MAPPED_CURRENT_DIR_DEFAULT_PATH: &'static str = "/mnt/host";
-
     pub fn map_dir(&mut self, alias: &str, target_on_disk: PathBuf) {
         self.mapped_dirs.push(MappedDirectory {
             guest: alias.to_string(),
@@ -269,7 +268,7 @@ impl Wasi {
 
                     MappedDirectory {
                         host: current_dir,
-                        guest: Self::MAPPED_CURRENT_DIR_DEFAULT_PATH.to_string(),
+                        guest: MAPPED_CURRENT_DIR_DEFAULT_PATH.to_string(),
                     }
                 } else {
                     let resolved = dir.canonicalize().with_context(|| {
@@ -322,7 +321,7 @@ impl Wasi {
 
                     MappedDirectory {
                         host: resolved_host,
-                        guest: Self::MAPPED_CURRENT_DIR_DEFAULT_PATH.to_string(),
+                        guest: MAPPED_CURRENT_DIR_DEFAULT_PATH.to_string(),
                     }
                 } else {
                     MappedDirectory {
@@ -353,7 +352,7 @@ impl Wasi {
                 .unwrap();
 
             if have_current_dir {
-                b.map_dir(".", Self::MAPPED_CURRENT_DIR_DEFAULT_PATH)?
+                b.map_dir(".", MAPPED_CURRENT_DIR_DEFAULT_PATH)?
             } else {
                 b.map_dir(".", "/")?
             }
@@ -402,7 +401,7 @@ impl Wasi {
         Ok(Vec::new())
     }
 
-    pub fn build_mapped_directories(&self) -> Result<Vec<MappedDirectory>, anyhow::Error> {
+    pub fn build_mapped_directories(&self) -> Result<(bool, Vec<MappedDirectory>), anyhow::Error> {
         let mut mapped_dirs = Vec::new();
 
         // Process the --dirs flag and merge it with --mapdir.
@@ -419,7 +418,7 @@ impl Wasi {
 
                 MappedDirectory {
                     host: current_dir,
-                    guest: Self::MAPPED_CURRENT_DIR_DEFAULT_PATH.to_string(),
+                    guest: MAPPED_CURRENT_DIR_DEFAULT_PATH.to_string(),
                 }
             } else {
                 let resolved = dir.canonicalize().with_context(|| {
@@ -472,7 +471,7 @@ impl Wasi {
 
                 MappedDirectory {
                     host: resolved_host,
-                    guest: Self::MAPPED_CURRENT_DIR_DEFAULT_PATH.to_string(),
+                    guest: MAPPED_CURRENT_DIR_DEFAULT_PATH.to_string(),
                 }
             } else {
                 MappedDirectory {
@@ -483,7 +482,7 @@ impl Wasi {
             mapped_dirs.push(mapping);
         }
 
-        Ok(mapped_dirs)
+        Ok((have_current_dir, mapped_dirs))
     }
 
     pub fn build_mapped_commands(&self) -> Result<Vec<MappedCommand>, anyhow::Error> {

lib/wasix/src/runners/mod.rs

@@ -13,5 +13,7 @@ pub mod wcgi;
 
 pub use self::{
     runner::Runner,
-    wasi_common::{MappedCommand, MappedDirectory, MountedDirectory},
+    wasi_common::{
+        MappedCommand, MappedDirectory, MountedDirectory, MAPPED_CURRENT_DIR_DEFAULT_PATH,
+    },
 };

lib/wasix/src/runners/wasi.rs

@@ -18,7 +18,7 @@ use crate::{
 };
 use wasmer_types::ModuleHash;
 
-use super::wasi_common::MappedCommand;
+use super::wasi_common::{MappedCommand, MAPPED_CURRENT_DIR_DEFAULT_PATH};
 
 #[derive(Debug, Default, Clone)]
 pub struct WasiRunner {
@@ -80,6 +80,11 @@ impl WasiRunner {
         self.with_mounted_directories(dirs.into_iter().map(Into::into).map(MountedDirectory::from))
     }
 
+    pub fn with_home_mapped(&mut self, is_home_mapped: bool) -> &mut Self {
+        self.wasi.is_home_mapped = is_home_mapped;
+        self
+    }
+
     pub fn with_mounted_directories<I, D>(&mut self, dirs: I) -> &mut Self
     where
         I: IntoIterator<Item = D>,
@@ -250,6 +255,10 @@ impl WasiRunner {
             builder.set_stderr(Box::new(stderr.clone()));
         }
 
+        if self.wasi.is_home_mapped {
+            builder.set_current_dir(MAPPED_CURRENT_DIR_DEFAULT_PATH);
+        }
+
         Ok(builder)
     }
 

lib/wasix/src/runners/wasi_common.rs

@@ -18,6 +18,8 @@ use crate::{
     WasiEnvBuilder,
 };
 
+pub const MAPPED_CURRENT_DIR_DEFAULT_PATH: &str = "/home";
+
 #[derive(Debug, Clone)]
 pub struct MappedCommand {
     /// The new alias.
@@ -34,6 +36,7 @@ pub(crate) struct CommonWasiOptions {
     pub(crate) forward_host_env: bool,
     pub(crate) mapped_host_commands: Vec<MappedCommand>,
     pub(crate) mounts: Vec<MountedDirectory>,
+    pub(crate) is_home_mapped: bool,
     pub(crate) injected_packages: Vec<BinaryPackage>,
     pub(crate) capabilities: Capabilities,
     #[derivative(Debug = "ignore")]

tests/wasix/.gitignore

@@ -0,0 +1,3 @@
+output*
+*.webc
+*.wasm

tests/wasix/cwd-to-home/expected

@@ -0,0 +1 @@
+0

tests/wasix/cwd-to-home/main.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <fcntl.h>
+
+int main()
+{
+    int fd = open("hello.txt", O_RDWR);
+    printf("%d", (fd == -1));
+
+    return 0;
+}

tests/wasix/cwd-to-home/run.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+$WASMER -q run main.wasm --dir=. > output
+
+diff -u output expected 1>/dev/null

tests/wasix/test.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+
+if [[ -z "${WASI_SDK}" ]]; then
+    echo "WASI_SDK is not found"
+    exit 1
+fi
+
+if [[ -z "${WASIX_SYSROOT}" ]]; then
+    echo "WASIX_SYSROOT is not found"
+    exit 1
+fi
+
+export RANLIB="$WASI_SDK/bin/ranlib"
+export AR="$WASI_SDK/bin/ar"
+export NM="$WASI_SDK/bin/nm"
+export CC="$WASI_SDK/bin/clang"
+export CXX="$WASI_SDK/bin/clang"
+export CFLAGS="\
+--sysroot=$WASIX_SYSROOT \
+-matomics \
+-mbulk-memory \
+-mmutable-globals \
+-pthread \
+-mthread-model posix \
+-ftls-model=local-exec \
+-fno-trapping-math \
+-D_WASI_EMULATED_MMAN \
+-D_WASI_EMULATED_SIGNAL \
+-D_WASI_EMULATED_PROCESS_CLOCKS \
+-O3 \
+-g \
+-flto"
+export LD="$WASI_SDK/bin/wasm-ld"
+export LDFLAGS="\
+-Wl,--shared-memory \
+-Wl,--max-memory=4294967296 \
+-Wl,--import-memory \
+-Wl,--export-dynamic \
+-Wl,--export=__heap_base \
+-Wl,--export=__stack_pointer \
+-Wl,--export=__data_end \
+-Wl,--export=__wasm_init_tls \
+-Wl,--export=__wasm_signal \
+-Wl,--export=__tls_size \
+-Wl,--export=__tls_align \
+-Wl,--export=__tls_base \
+-lwasi-emulated-mman \
+-O3 \
+-g \
+-flto"
+export LIBS="\
+-Wl,--shared-memory \
+-Wl,--max-memory=4294967296 \
+-Wl,--import-memory \
+-Wl,--export-dynamic \
+-Wl,--export=__heap_base \
+-Wl,--export=__stack_pointer \
+-Wl,--export=__data_end \
+-Wl,--export=__wasm_init_tls \
+-Wl,--export=__wasm_signal \
+-Wl,--export=__tls_size \
+-Wl,--export=__tls_align \
+-Wl,--export=__tls_base \
+-lwasi-emulated-mman \
+-O3 \
+-g \
+-flto"
+
+export WASMER=$(realpath "../../target/release/wasmer")
+
+printf "\n\nStarting WASIX Test Suite:\n"
+
+status=0
+while read dir; do
+    dir=$(basename "$dir")
+    printf "Testing $dir..."
+
+    cmd="cd $dir; \
+        $CC $CFLAGS $LDFLAGS -o main.wasm main.c; \
+        ./run.sh"
+
+    if bash -c "$cmd"; then
+        printf "\rTesting $dir ✅\n"
+    else
+        printf "\rTesting $dir ❌\n"
+        status=1
+    fi
+done < <(find . -mindepth 1 -maxdepth 1 -type d)
+
+exit $status