Function get_stack_trace_field

src/native.rs:256–274

(jni_env: *mut JNIEnv)

}

unsafe fn get_stack_trace_field(jni_env: *mut JNIEnv) -> Result<jfieldID, String> {
    static mut STACK_TRACE_FIELD: jfieldID = 0 as jfieldID;
    static ONCE: Once = ONCE_INIT;
    ONCE.call_once(|| {
        let throwable_class = get_throwable_class(jni_env).unwrap_or(ptr::null_mut());
        if !throwable_class.is_null() {
            // We swallow exceptions in here on purpose
            let field_name_str = CString::new("stackTrace").unwrap();
            let field_sig_str = CString::new("[Ljava/lang/StackTraceElement;").unwrap();
            STACK_TRACE_FIELD = (**jni_env).GetFieldID.unwrap()(jni_env,
                                                                throwable_class,
                                                                field_name_str.as_ptr(),
                                                                field_sig_str.as_ptr());
            let _ = util::result_or_jni_ex((), jni_env);
        }
    });
    if STACK_TRACE_FIELD.is_null() { return Result::Err("No stackTrace field".to_string()); }
    return Result::Ok(STACK_TRACE_FIELD);
}

unsafe fn populate_stack_params(jni_env: *mut JNIEnv, this: jobject, thread: jthread) -> Result<(), String> {
    // Grab the depth we want