Delete ctr-std to use my fork of the rust repo instead

1 files changed, 0 insertions, 550 deletions

diff --git a/ctr-std/src/panicking.rs b/ctr-std/src/panicking.rs
deleted file mode 100644
index c612604..0000000
--- a/ctr-std/src/panicking.rs
+++ /dev/null
@@ -1,550 +0,0 @@
-// Copyright 2014 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.
-
-//! Implementation of various bits and pieces of the `panic!` macro and
-//! associated runtime pieces.
-//!
-//! Specifically, this module contains the implementation of:
-//!
-//! * Panic hooks
-//! * Executing a panic up to doing the actual implementation
-//! * Shims around "try"
-
-use core::panic::BoxMeUp;
-
-use io::prelude::*;
-
-use any::Any;
-use cell::RefCell;
-use core::panic::{PanicInfo, Location};
-use fmt;
-use intrinsics;
-use mem;
-use ptr;
-use raw;
-use sys::stdio::{Stderr, stderr_prints_nothing};
-use sys_common::rwlock::RWLock;
-use sys_common::thread_info;
-use sys_common::util;
-use thread;
-
-thread_local! {
-    pub static LOCAL_STDERR: RefCell<Option<Box<dyn Write + Send>>> = {
-        RefCell::new(None)
-    }
-}
-
-// Binary interface to the panic runtime that the standard library depends on.
-//
-// The standard library is tagged with `#![needs_panic_runtime]` (introduced in
-// RFC 1513) to indicate that it requires some other crate tagged with
-// `#![panic_runtime]` to exist somewhere. Each panic runtime is intended to
-// implement these symbols (with the same signatures) so we can get matched up
-// to them.
-//
-// One day this may look a little less ad-hoc with the compiler helping out to
-// hook up these functions, but it is not this day!
-#[allow(improper_ctypes)]
-extern {
-    fn __rust_maybe_catch_panic(f: fn(*mut u8),
-                                data: *mut u8,
-                                data_ptr: *mut usize,
-                                vtable_ptr: *mut usize) -> u32;
-    #[unwind(allowed)]
-    fn __rust_start_panic(payload: usize) -> u32;
-}
-
-#[derive(Copy, Clone)]
-enum Hook {
-    Default,
-    Custom(*mut (dyn Fn(&PanicInfo) + 'static + Sync + Send)),
-}
-
-static HOOK_LOCK: RWLock = RWLock::new();
-static mut HOOK: Hook = Hook::Default;
-
-/// Registers a custom panic hook, replacing any that was previously registered.
-///
-/// The panic hook is invoked when a thread panics, but before the panic runtime
-/// is invoked. As such, the hook will run with both the aborting and unwinding
-/// runtimes. The default hook prints a message to standard error and generates
-/// a backtrace if requested, but this behavior can be customized with the
-/// `set_hook` and [`take_hook`] functions.
-///
-/// [`take_hook`]: ./fn.take_hook.html
-///
-/// The hook is provided with a `PanicInfo` struct which contains information
-/// about the origin of the panic, including the payload passed to `panic!` and
-/// the source code location from which the panic originated.
-///
-/// The panic hook is a global resource.
-///
-/// # Panics
-///
-/// Panics if called from a panicking thread.
-///
-/// # Examples
-///
-/// The following will print "Custom panic hook":
-///
-/// ```should_panic
-/// use std::panic;
-///
-/// panic::set_hook(Box::new(|_| {
-///     println!("Custom panic hook");
-/// }));
-///
-/// panic!("Normal panic");
-/// ```
-#[stable(feature = "panic_hooks", since = "1.10.0")]
-pub fn set_hook(hook: Box<dyn Fn(&PanicInfo) + 'static + Sync + Send>) {
-    if thread::panicking() {
-        panic!("cannot modify the panic hook from a panicking thread");
-    }
-
-    unsafe {
-        HOOK_LOCK.write();
-        let old_hook = HOOK;
-        HOOK = Hook::Custom(Box::into_raw(hook));
-        HOOK_LOCK.write_unlock();
-
-        if let Hook::Custom(ptr) = old_hook {
-            Box::from_raw(ptr);
-        }
-    }
-}
-
-/// Unregisters the current panic hook, returning it.
-///
-/// *See also the function [`set_hook`].*
-///
-/// [`set_hook`]: ./fn.set_hook.html
-///
-/// If no custom hook is registered, the default hook will be returned.
-///
-/// # Panics
-///
-/// Panics if called from a panicking thread.
-///
-/// # Examples
-///
-/// The following will print "Normal panic":
-///
-/// ```should_panic
-/// use std::panic;
-///
-/// panic::set_hook(Box::new(|_| {
-///     println!("Custom panic hook");
-/// }));
-///
-/// let _ = panic::take_hook();
-///
-/// panic!("Normal panic");
-/// ```
-#[stable(feature = "panic_hooks", since = "1.10.0")]
-pub fn take_hook() -> Box<dyn Fn(&PanicInfo) + 'static + Sync + Send> {
-    if thread::panicking() {
-        panic!("cannot modify the panic hook from a panicking thread");
-    }
-
-    unsafe {
-        HOOK_LOCK.write();
-        let hook = HOOK;
-        HOOK = Hook::Default;
-        HOOK_LOCK.write_unlock();
-
-        match hook {
-            Hook::Default => Box::new(default_hook),
-            Hook::Custom(ptr) => Box::from_raw(ptr),
-        }
-    }
-}
-
-fn default_hook(info: &PanicInfo) {
-    #[cfg(feature = "backtrace")]
-    use sys_common::backtrace;
-
-    // If this is a double panic, make sure that we print a backtrace
-    // for this panic. Otherwise only print it if logging is enabled.
-    #[cfg(feature = "backtrace")]
-    let log_backtrace = {
-        let panics = update_panic_count(0);
-
-        if panics >= 2 {
-            Some(backtrace::PrintFormat::Full)
-        } else {
-            backtrace::log_enabled()
-        }
-    };
-
-    let location = info.location().unwrap();  // The current implementation always returns Some
-
-    let msg = match info.payload().downcast_ref::<&'static str>() {
-        Some(s) => *s,
-        None => match info.payload().downcast_ref::<String>() {
-            Some(s) => &s[..],
-            None => "Box<Any>",
-        }
-    };
-    let mut err = Stderr::new().ok();
-    let thread = thread_info::current_thread();
-    let name = thread.as_ref().and_then(|t| t.name()).unwrap_or("<unnamed>");
-
-    // 3DS-specific code begins here to display panics via the Error applet
-    use libctru::{errorInit, errorText, errorDisp, errorConf, ERROR_TEXT_WORD_WRAP,
-                  CFG_LANGUAGE_EN, consoleDebugInit, debugDevice_SVC};
-
-    let error_text = format!("thread '{}' panicked at '{}', {}", name, msg, location);
-
-    unsafe {
-        // Prepare error message for display
-        let mut error_conf: errorConf = mem::uninitialized();
-        errorInit(&mut error_conf,
-                  ERROR_TEXT_WORD_WRAP,
-                  CFG_LANGUAGE_EN);
-        errorText(&mut error_conf, error_text.as_ptr() as *const ::libc::c_char);
-
-        // Display the error
-        errorDisp(&mut error_conf);
-    }
-
-    // Let's also write to stderr using the debug console. The output will be
-    // visible in Citra if a custom logging filter such as `Debug.Emulated:Debug`
-    // is enabled in the logging section of `~/.config/citra-emu/sdl2-config.ini`
-    unsafe {
-        consoleDebugInit(debugDevice_SVC);
-    }
-
-    let write = |err: &mut dyn (::io::Write)| {
-        let _ = write!(err, "{}", error_text);
-
-        #[cfg(feature = "backtrace")]
-        {
-            use sync::atomic::{AtomicBool, Ordering};
-
-            static FIRST_PANIC: AtomicBool = AtomicBool::new(true);
-
-            if let Some(format) = log_backtrace {
-                let _ = backtrace::print(err, format);
-            } else if FIRST_PANIC.compare_and_swap(true, false, Ordering::SeqCst) {
-                let _ = writeln!(err, "note: Run with `RUST_BACKTRACE=1` for a backtrace.");
-            }
-        }
-    };
-
-    let prev = LOCAL_STDERR.with(|s| s.borrow_mut().take());
-    match (prev, err.as_mut()) {
-       (Some(mut stderr), _) => {
-           write(&mut *stderr);
-           let mut s = Some(stderr);
-           LOCAL_STDERR.with(|slot| {
-               *slot.borrow_mut() = s.take();
-           });
-       }
-       (None, Some(ref mut err)) => { write(err) }
-       _ => {}
-    }
-}
-
-
-#[cfg(not(test))]
-#[doc(hidden)]
-#[unstable(feature = "update_panic_count", issue = "0")]
-pub fn update_panic_count(amt: isize) -> usize {
-    use cell::Cell;
-    thread_local! { static PANIC_COUNT: Cell<usize> = Cell::new(0) }
-
-    PANIC_COUNT.with(|c| {
-        let next = (c.get() as isize + amt) as usize;
-        c.set(next);
-        return next
-    })
-}
-
-#[cfg(test)]
-pub use realstd::rt::update_panic_count;
-
-/// Invoke a closure, capturing the cause of an unwinding panic if one occurs.
-pub unsafe fn try<R, F: FnOnce() -> R>(f: F) -> Result<R, Box<dyn Any + Send>> {
-    #[allow(unions_with_drop_fields)]
-    union Data<F, R> {
-        f: F,
-        r: R,
-    }
-
-    // We do some sketchy operations with ownership here for the sake of
-    // performance. We can only  pass pointers down to
-    // `__rust_maybe_catch_panic` (can't pass objects by value), so we do all
-    // the ownership tracking here manually using a union.
-    //
-    // We go through a transition where:
-    //
-    // * First, we set the data to be the closure that we're going to call.
-    // * When we make the function call, the `do_call` function below, we take
-    //   ownership of the function pointer. At this point the `Data` union is
-    //   entirely uninitialized.
-    // * If the closure successfully returns, we write the return value into the
-    //   data's return slot. Note that `ptr::write` is used as it's overwriting
-    //   uninitialized data.
-    // * Finally, when we come back out of the `__rust_maybe_catch_panic` we're
-    //   in one of two states:
-    //
-    //      1. The closure didn't panic, in which case the return value was
-    //         filled in. We move it out of `data` and return it.
-    //      2. The closure panicked, in which case the return value wasn't
-    //         filled in. In this case the entire `data` union is invalid, so
-    //         there is no need to drop anything.
-    //
-    // Once we stack all that together we should have the "most efficient'
-    // method of calling a catch panic whilst juggling ownership.
-    let mut any_data = 0;
-    let mut any_vtable = 0;
-    let mut data = Data {
-        f,
-    };
-
-    let r = __rust_maybe_catch_panic(do_call::<F, R>,
-                                     &mut data as *mut _ as *mut u8,
-                                     &mut any_data,
-                                     &mut any_vtable);
-
-    return if r == 0 {
-        debug_assert!(update_panic_count(0) == 0);
-        Ok(data.r)
-    } else {
-        update_panic_count(-1);
-        debug_assert!(update_panic_count(0) == 0);
-        Err(mem::transmute(raw::TraitObject {
-            data: any_data as *mut _,
-            vtable: any_vtable as *mut _,
-        }))
-    };
-
-    fn do_call<F: FnOnce() -> R, R>(data: *mut u8) {
-        unsafe {
-            let data = data as *mut Data<F, R>;
-            let f = ptr::read(&mut (*data).f);
-            ptr::write(&mut (*data).r, f());
-        }
-    }
-}
-
-/// Determines whether the current thread is unwinding because of panic.
-pub fn panicking() -> bool {
-    update_panic_count(0) != 0
-}
-
-/// Entry point of panic from the libcore crate.
-#[cfg(not(test))]
-#[panic_implementation]
-#[unwind(allowed)]
-pub fn rust_begin_panic(info: &PanicInfo) -> ! {
-    continue_panic_fmt(&info)
-}
-
-/// The entry point for panicking with a formatted message.
-///
-/// This is designed to reduce the amount of code required at the call
-/// site as much as possible (so that `panic!()` has as low an impact
-/// on (e.g.) the inlining of other functions as possible), by moving
-/// the actual formatting into this shared place.
-#[unstable(feature = "libstd_sys_internals",
-           reason = "used by the panic! macro",
-           issue = "0")]
-#[inline(never)] #[cold]
-pub fn begin_panic_fmt(msg: &fmt::Arguments,
-                       file_line_col: &(&'static str, u32, u32)) -> ! {
-    let (file, line, col) = *file_line_col;
-    let info = PanicInfo::internal_constructor(
-        Some(msg),
-        Location::internal_constructor(file, line, col),
-    );
-    continue_panic_fmt(&info)
-}
-
-fn continue_panic_fmt(info: &PanicInfo) -> ! {
-    struct PanicPayload<'a> {
-        inner: &'a fmt::Arguments<'a>,
-        string: Option<String>,
-    }
-
-    impl<'a> PanicPayload<'a> {
-        fn new(inner: &'a fmt::Arguments<'a>) -> PanicPayload<'a> {
-            PanicPayload { inner, string: None }
-        }
-
-        fn fill(&mut self) -> &mut String {
-            use fmt::Write;
-
-            let inner = self.inner;
-            self.string.get_or_insert_with(|| {
-                let mut s = String::new();
-                drop(s.write_fmt(*inner));
-                s
-            })
-        }
-    }
-
-    unsafe impl<'a> BoxMeUp for PanicPayload<'a> {
-        fn box_me_up(&mut self) -> *mut (dyn Any + Send) {
-            let contents = mem::replace(self.fill(), String::new());
-            Box::into_raw(Box::new(contents))
-        }
-
-        fn get(&mut self) -> &(dyn Any + Send) {
-            self.fill()
-        }
-    }
-
-    // We do two allocations here, unfortunately. But (a) they're
-    // required with the current scheme, and (b) we don't handle
-    // panic + OOM properly anyway (see comment in begin_panic
-    // below).
-
-    let loc = info.location().unwrap(); // The current implementation always returns Some
-    let msg = info.message().unwrap(); // The current implementation always returns Some
-    let file_line_col = (loc.file(), loc.line(), loc.column());
-    rust_panic_with_hook(
-        &mut PanicPayload::new(msg),
-        info.message(),
-        &file_line_col);
-}
-
-/// This is the entry point of panicking for panic!() and assert!().
-#[unstable(feature = "libstd_sys_internals",
-           reason = "used by the panic! macro",
-           issue = "0")]
-#[inline(never)] #[cold] // avoid code bloat at the call sites as much as possible
-pub fn begin_panic<M: Any + Send>(msg: M, file_line_col: &(&'static str, u32, u32)) -> ! {
-    // Note that this should be the only allocation performed in this code path.
-    // Currently this means that panic!() on OOM will invoke this code path,
-    // but then again we're not really ready for panic on OOM anyway. If
-    // we do start doing this, then we should propagate this allocation to
-    // be performed in the parent of this thread instead of the thread that's
-    // panicking.
-
-    rust_panic_with_hook(&mut PanicPayload::new(msg), None, file_line_col);
-
-    struct PanicPayload<A> {
-        inner: Option<A>,
-    }
-
-    impl<A: Send + 'static> PanicPayload<A> {
-        fn new(inner: A) -> PanicPayload<A> {
-            PanicPayload { inner: Some(inner) }
-        }
-    }
-
-    unsafe impl<A: Send + 'static> BoxMeUp for PanicPayload<A> {
-        fn box_me_up(&mut self) -> *mut (dyn Any + Send) {
-            let data = match self.inner.take() {
-                Some(a) => Box::new(a) as Box<dyn Any + Send>,
-                None => Box::new(()),
-            };
-            Box::into_raw(data)
-        }
-
-        fn get(&mut self) -> &(dyn Any + Send) {
-            match self.inner {
-                Some(ref a) => a,
-                None => &(),
-            }
-        }
-    }
-}
-
-/// Central point for dispatching panics.
-///
-/// Executes the primary logic for a panic, including checking for recursive
-/// panics, panic hooks, and finally dispatching to the panic runtime to either
-/// abort or unwind.
-fn rust_panic_with_hook(payload: &mut dyn BoxMeUp,
-                        message: Option<&fmt::Arguments>,
-                        file_line_col: &(&str, u32, u32)) -> ! {
-    let (file, line, col) = *file_line_col;
-
-    let panics = update_panic_count(1);
-
-    // If this is the third nested call (e.g. panics == 2, this is 0-indexed),
-    // the panic hook probably triggered the last panic, otherwise the
-    // double-panic check would have aborted the process. In this case abort the
-    // process real quickly as we don't want to try calling it again as it'll
-    // probably just panic again.
-    if panics > 2 {
-        util::dumb_print(format_args!("thread panicked while processing \
-                                       panic. aborting.\n"));
-        unsafe { intrinsics::abort() }
-    }
-
-    unsafe {
-        let mut info = PanicInfo::internal_constructor(
-            message,
-            Location::internal_constructor(file, line, col),
-        );
-        HOOK_LOCK.read();
-        match HOOK {
-            // Some platforms know that printing to stderr won't ever actually
-            // print anything, and if that's the case we can skip the default
-            // hook.
-            Hook::Default if stderr_prints_nothing() => {}
-            Hook::Default => {
-                info.set_payload(payload.get());
-                default_hook(&info);
-            }
-            Hook::Custom(ptr) => {
-                info.set_payload(payload.get());
-                (*ptr)(&info);
-            }
-        }
-        HOOK_LOCK.read_unlock();
-    }
-
-    if panics > 1 {
-        // If a thread panics while it's already unwinding then we
-        // have limited options. Currently our preference is to
-        // just abort. In the future we may consider resuming
-        // unwinding or otherwise exiting the thread cleanly.
-        util::dumb_print(format_args!("thread panicked while panicking. \
-                                       aborting.\n"));
-        unsafe { intrinsics::abort() }
-    }
-
-    rust_panic(payload)
-}
-
-/// Shim around rust_panic. Called by resume_unwind.
-pub fn update_count_then_panic(msg: Box<dyn Any + Send>) -> ! {
-    update_panic_count(1);
-
-    struct RewrapBox(Box<dyn Any + Send>);
-
-    unsafe impl BoxMeUp for RewrapBox {
-        fn box_me_up(&mut self) -> *mut (dyn Any + Send) {
-            Box::into_raw(mem::replace(&mut self.0, Box::new(())))
-        }
-
-        fn get(&mut self) -> &(dyn Any + Send) {
-            &*self.0
-        }
-    }
-
-    rust_panic(&mut RewrapBox(msg))
-}
-
-/// A private no-mangle function on which to slap yer breakpoints.
-#[no_mangle]
-#[allow(private_no_mangle_fns)] // yes we get it, but we like breakpoints
-pub fn rust_panic(mut msg: &mut dyn BoxMeUp) -> ! {
-    let code = unsafe {
-        let obj = &mut msg as *mut &mut dyn BoxMeUp;
-        __rust_start_panic(obj as usize)
-    };
-    rtabort!("failed to initiate panic, error {}", code)
-}