Add function to retrieve function name from wasm_frame_t

lib/c-api/src/wasm_c_api/types/frame.rs

@@ -1,4 +1,6 @@
 use super::super::instance::wasm_instance_t;
+use libc::c_char;
+use std::ffi::CString;
 use wasmer_api::FrameInfo;
 
 #[allow(non_camel_case_types)]
@@ -47,4 +49,52 @@ pub unsafe extern "C" fn wasm_frame_module_offset(frame: &wasm_frame_t) -> usize
     frame.info.module_offset()
 }
 
+#[repr(C)]
+#[allow(non_camel_case_types)]
+#[derive(Debug, Clone)]
+pub struct wasm_name_t {
+    pub name: *mut c_char,
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn wasm_frame_module_name(frame: &wasm_frame_t) -> wasm_name_t {
+    let null = wasm_name_t {
+        name: core::ptr::null_mut(),
+    };
+
+    let module_name =
+        Some(frame.info.module_name()).and_then(|f| Some(CString::new(f).ok()?.into_raw()));
+
+    match module_name {
+        Some(s) => wasm_name_t { name: s },
+        None => null,
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn wasm_frame_func_name(frame: &wasm_frame_t) -> wasm_name_t {
+    let null = wasm_name_t {
+        name: core::ptr::null_mut(),
+    };
+
+    let func_name = frame
+        .info
+        .function_name()
+        .and_then(|f| Some(CString::new(f).ok()?.into_raw()));
+
+    match func_name {
+        Some(s) => wasm_name_t { name: s },
+        None => null,
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn wasm_name_delete(name: Option<&mut wasm_name_t>) {
+    if let Some(s) = name {
+        if !s.name.is_null() {
+            let _ = CString::from_raw(s.name);
+        }
+    }
+}
+
 wasm_declare_boxed_vec!(frame);