Added emscripten _signal, improved chdir implementation

src/apis/emscripten/mod.rs

@@ -306,6 +306,11 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
         "_sigaction",
         ImportValue::Func(signal::_sigaction as _),
     );
+    import_object.set(
+        "env",
+        "_signal",
+        ImportValue::Func(signal::_signal as _),
+    );
     // Memory
     import_object.set(
         "env",

src/apis/emscripten/signal.rs

@@ -28,3 +28,8 @@ pub extern "C" fn _sigprocmask() -> i32 {
     debug!("emscripten::_sigprocmask");
     0
 }
+
+pub extern "C" fn _signal(sig: u32, _instance: &mut Instance) -> i32 {
+    debug!("emscripten::_signal ({})", sig);
+    0
+}

src/apis/emscripten/syscalls.rs

@@ -53,6 +53,7 @@ use libc::{
     select,
     FIONBIO,
     setpgid,
+    chdir
 };
 
 /// exit
@@ -134,13 +135,13 @@ pub extern "C" fn ___syscall12(
 ) -> c_int {
     debug!("emscripten::___syscall12 (chdir)");
     let path_addr: i32 = varargs.get(instance);
-    let _path = unsafe {
+    unsafe {
         let path_ptr = instance.memory_offset_addr(0, path_addr as usize) as *const i8;
-        let path = std::ffi::CStr::from_ptr(path_ptr).to_str().unwrap();
+        let path = std::ffi::CStr::from_ptr(path_ptr);
-        debug!("=> path: {}", path);
+        let ret = chdir(path_ptr);
-        path
+        debug!("=> path: {:?}, ret: {}", path, ret);
-    };
+        ret
-    0
+    }
 }
 
 // getpid