diff options
Diffstat (limited to 'vendor/libloading-0.7.4/src/os')
| -rw-r--r-- | vendor/libloading-0.7.4/src/os/mod.rs | 27 | ||||
| -rw-r--r-- | vendor/libloading-0.7.4/src/os/unix/consts.rs | 237 | ||||
| -rw-r--r-- | vendor/libloading-0.7.4/src/os/unix/mod.rs | 444 | ||||
| -rw-r--r-- | vendor/libloading-0.7.4/src/os/windows/mod.rs | 532 |
4 files changed, 1240 insertions, 0 deletions
diff --git a/vendor/libloading-0.7.4/src/os/mod.rs b/vendor/libloading-0.7.4/src/os/mod.rs new file mode 100644 index 000000000..710353f5e --- /dev/null +++ b/vendor/libloading-0.7.4/src/os/mod.rs @@ -0,0 +1,27 @@ +//! Unsafe but flexible platform-specific bindings to dynamic library loading facilities. +//! +//! These modules expose more extensive and powerful bindings to the dynamic +//! library loading facilities. Use of these bindings come at the cost of less (in most cases, +//! none at all) safety guarantees, which are provided by the top-level bindings. +//! +//! # Examples +//! +//! Using these modules will likely involve conditional compilation: +//! +//! ```ignore +//! # extern crate libloading; +//! #[cfg(unix)] +//! use libloading::os::unix::*; +//! #[cfg(windows)] +//! use libloading::os::windows::*; +//! ``` + +/// UNIX implementation of dynamic library loading. +#[cfg(any(unix, libloading_docs))] +#[cfg_attr(libloading_docs, doc(cfg(unix)))] +pub mod unix; + +/// Windows implementation of dynamic library loading. +#[cfg(any(windows, libloading_docs))] +#[cfg_attr(libloading_docs, doc(cfg(windows)))] +pub mod windows; diff --git a/vendor/libloading-0.7.4/src/os/unix/consts.rs b/vendor/libloading-0.7.4/src/os/unix/consts.rs new file mode 100644 index 000000000..ea7a6a102 --- /dev/null +++ b/vendor/libloading-0.7.4/src/os/unix/consts.rs @@ -0,0 +1,237 @@ +use std::os::raw::c_int; + +/// Perform lazy binding. +/// +/// Relocations shall be performed at an implementation-defined time, ranging from the time +/// of the [`Library::open`] call until the first reference to a given symbol occurs. +/// Specifying `RTLD_LAZY` should improve performance on implementations supporting dynamic +/// symbol binding since a process might not reference all of the symbols in an executable +/// object file. And, for systems supporting dynamic symbol resolution for normal process +/// execution, this behaviour mimics the normal handling of process execution. +/// +/// Conflicts with [`RTLD_NOW`]. +/// +/// [`Library::open`]: crate::os::unix::Library::open +pub const RTLD_LAZY: c_int = posix::RTLD_LAZY; + +/// Perform eager binding. +/// +/// All necessary relocations shall be performed when the executable object file is first +/// loaded. This may waste some processing if relocations are performed for symbols +/// that are never referenced. This behaviour may be useful for applications that need to +/// know that all symbols referenced during execution will be available before +/// [`Library::open`] returns. +/// +/// Conflicts with [`RTLD_LAZY`]. +/// +/// [`Library::open`]: crate::os::unix::Library::open +pub const RTLD_NOW: c_int = posix::RTLD_NOW; + +/// Make loaded symbols available for resolution globally. +/// +/// The executable object file's symbols shall be made available for relocation processing of any +/// other executable object file. In addition, calls to [`Library::get`] on `Library` obtained from +/// [`Library::this`] allows executable object files loaded with this mode to be searched. +/// +/// [`Library::this`]: crate::os::unix::Library::this +/// [`Library::get`]: crate::os::unix::Library::get +pub const RTLD_GLOBAL: c_int = posix::RTLD_GLOBAL; + +/// Load symbols into an isolated namespace. +/// +/// The executable object file's symbols shall not be made available for relocation processing of +/// any other executable object file. This mode of operation is most appropriate for e.g. plugins. +pub const RTLD_LOCAL: c_int = posix::RTLD_LOCAL; + +#[cfg(all(libloading_docs, not(unix)))] +mod posix { + use super::c_int; + pub(super) const RTLD_LAZY: c_int = !0; + pub(super) const RTLD_NOW: c_int = !0; + pub(super) const RTLD_GLOBAL: c_int = !0; + pub(super) const RTLD_LOCAL: c_int = !0; +} + +#[cfg(any(not(libloading_docs), unix))] +mod posix { + extern crate cfg_if; + use self::cfg_if::cfg_if; + use super::c_int; + cfg_if! { + if #[cfg(target_os = "haiku")] { + pub(super) const RTLD_LAZY: c_int = 0; + } else if #[cfg(target_os = "aix")] { + pub(super) const RTLD_LAZY: c_int = 4; + } else if #[cfg(any( + target_os = "linux", + target_os = "android", + target_os = "emscripten", + + target_os = "macos", + target_os = "ios", + target_os = "freebsd", + target_os = "dragonfly", + target_os = "openbsd", + target_os = "netbsd", + + target_os = "solaris", + target_os = "illumos", + + target_env = "uclibc", + target_env = "newlib", + + target_os = "fuchsia", + target_os = "redox", + ))] { + pub(super) const RTLD_LAZY: c_int = 1; + } else { + compile_error!( + "Target has no known `RTLD_LAZY` value. Please submit an issue or PR adding it." + ); + } + } + + cfg_if! { + if #[cfg(target_os = "haiku")] { + pub(super) const RTLD_NOW: c_int = 1; + } else if #[cfg(any( + target_os = "linux", + all(target_os = "android", target_pointer_width = "64"), + target_os = "emscripten", + + target_os = "macos", + target_os = "ios", + target_os = "freebsd", + target_os = "dragonfly", + target_os = "openbsd", + target_os = "netbsd", + + target_os = "aix", + target_os = "solaris", + target_os = "illumos", + + target_env = "uclibc", + target_env = "newlib", + + target_os = "fuchsia", + target_os = "redox", + ))] { + pub(super) const RTLD_NOW: c_int = 2; + } else if #[cfg(all(target_os = "android",target_pointer_width = "32"))] { + pub(super) const RTLD_NOW: c_int = 0; + } else { + compile_error!( + "Target has no known `RTLD_NOW` value. Please submit an issue or PR adding it." + ); + } + } + + cfg_if! { + if #[cfg(any( + target_os = "haiku", + all(target_os = "android",target_pointer_width = "32"), + ))] { + pub(super) const RTLD_GLOBAL: c_int = 2; + } else if #[cfg(target_os = "aix")] { + pub(super) const RTLD_GLOBAL: c_int = 0x10000; + } else if #[cfg(any( + target_env = "uclibc", + all(target_os = "linux", target_arch = "mips"), + all(target_os = "linux", target_arch = "mips64"), + ))] { + pub(super) const RTLD_GLOBAL: c_int = 4; + } else if #[cfg(any( + target_os = "macos", + target_os = "ios", + ))] { + pub(super) const RTLD_GLOBAL: c_int = 8; + } else if #[cfg(any( + target_os = "linux", + all(target_os = "android", target_pointer_width = "64"), + target_os = "emscripten", + + target_os = "freebsd", + target_os = "dragonfly", + target_os = "openbsd", + target_os = "netbsd", + + target_os = "solaris", + target_os = "illumos", + + target_env = "newlib", + + target_os = "fuchsia", + target_os = "redox", + ))] { + pub(super) const RTLD_GLOBAL: c_int = 0x100; + } else { + compile_error!( + "Target has no known `RTLD_GLOBAL` value. Please submit an issue or PR adding it." + ); + } + } + + cfg_if! { + if #[cfg(target_os = "netbsd")] { + pub(super) const RTLD_LOCAL: c_int = 0x200; + } else if #[cfg(target_os = "aix")] { + pub(super) const RTLD_LOCAL: c_int = 0x80000; + } else if #[cfg(any( + target_os = "macos", + target_os = "ios", + ))] { + pub(super) const RTLD_LOCAL: c_int = 4; + } else if #[cfg(any( + target_os = "linux", + target_os = "android", + target_os = "emscripten", + + target_os = "freebsd", + target_os = "dragonfly", + target_os = "openbsd", + + target_os = "haiku", + + target_os = "solaris", + target_os = "illumos", + + target_env = "uclibc", + target_env = "newlib", + + target_os = "fuchsia", + target_os = "redox", + ))] { + pub(super) const RTLD_LOCAL: c_int = 0; + } else { + compile_error!( + "Target has no known `RTLD_LOCAL` value. Please submit an issue or PR adding it." + ); + } + } +} + +// Other constants that exist but are not bound because they are platform-specific (non-posix) +// extensions. Some of these constants are only relevant to `dlsym` or `dlmopen` calls. +// +// RTLD_CONFGEN +// RTLD_DEFAULT +// RTLD_DI_CONFIGADDR +// RTLD_DI_LINKMAP +// RTLD_DI_LMID +// RTLD_DI_ORIGIN +// RTLD_DI_PROFILENAME +// RTLD_DI_PROFILEOUT +// RTLD_DI_SERINFO +// RTLD_DI_SERINFOSIZE +// RTLD_DI_TLS_DATA +// RTLD_DI_TLS_MODID +// RTLD_FIRST +// RTLD_GROUP +// RTLD_NEXT +// RTLD_PARENT +// RTLD_PROBE +// RTLD_SELF +// RTLD_WORLD +// RTLD_NODELETE +// RTLD_NOLOAD +// RTLD_DEEPBIND diff --git a/vendor/libloading-0.7.4/src/os/unix/mod.rs b/vendor/libloading-0.7.4/src/os/unix/mod.rs new file mode 100644 index 000000000..df7efdad5 --- /dev/null +++ b/vendor/libloading-0.7.4/src/os/unix/mod.rs @@ -0,0 +1,444 @@ +// A hack for docs.rs to build documentation that has both windows and linux documentation in the +// same rustdoc build visible. +#[cfg(all(libloading_docs, not(unix)))] +mod unix_imports {} +#[cfg(any(not(libloading_docs), unix))] +mod unix_imports { + pub(super) use std::os::unix::ffi::OsStrExt; +} + +pub use self::consts::*; +use self::unix_imports::*; +use std::ffi::{CStr, OsStr}; +use std::os::raw; +use std::{fmt, marker, mem, ptr}; +use util::{cstr_cow_from_bytes, ensure_compatible_types}; + +mod consts; + +// dl* family of functions did not have enough thought put into it. +// +// Whole error handling scheme is done via setting and querying some global state, therefore it is +// not safe to use dynamic library loading in MT-capable environment at all. Only in POSIX 2008+TC1 +// a thread-local state was allowed for `dlerror`, making the dl* family of functions MT-safe. +// +// In practice (as of 2020-04-01) most of the widely used targets use a thread-local for error +// state and have been doing so for a long time. Regardless the comments in this function shall +// remain as a documentation for the future generations. +fn with_dlerror<T, F>(wrap: fn(crate::error::DlDescription) -> crate::Error, closure: F) +-> Result<T, Option<crate::Error>> +where F: FnOnce() -> Option<T> { + // We used to guard all uses of dl* functions with our own mutex. This made them safe to use in + // MT programs provided the only way a program used dl* was via this library. However, it also + // had a number of downsides or cases where it failed to handle the problems. For instance, + // if any other library called `dlerror` internally concurrently with `libloading` things would + // still go awry. + // + // On platforms where `dlerror` is still MT-unsafe, `dlsym` (`Library::get`) can spuriously + // succeed and return a null pointer for a symbol when the actual symbol look-up operation + // fails. Instances where the actual symbol _could_ be `NULL` are platform specific. For + // instance on GNU glibc based-systems (an excerpt from dlsym(3)): + // + // > The value of a symbol returned by dlsym() will never be NULL if the shared object is the + // > result of normal compilation, since a global symbol is never placed at the NULL + // > address. There are nevertheless cases where a lookup using dlsym() may return NULL as the + // > value of a symbol. For example, the symbol value may be the result of a GNU indirect + // > function (IFUNC) resolver function that returns NULL as the resolved value. + + // While we could could call `dlerror` here to clear the previous error value, only the `dlsym` + // call depends on it being cleared beforehand and only in some cases too. We will instead + // clear the error inside the dlsym binding instead. + // + // In all the other cases, clearing the error here will only be hiding misuse of these bindings + // or a bug in implementation of dl* family of functions. + closure().ok_or_else(|| unsafe { + // This code will only get executed if the `closure` returns `None`. + let error = dlerror(); + if error.is_null() { + // In non-dlsym case this may happen when there’re bugs in our bindings or there’s + // non-libloading user of libdl; possibly in another thread. + None + } else { + // You can’t even rely on error string being static here; call to subsequent dlerror + // may invalidate or overwrite the error message. Why couldn’t they simply give up the + // ownership over the message? + // TODO: should do locale-aware conversion here. OTOH Rust doesn’t seem to work well in + // any system that uses non-utf8 locale, so I doubt there’s a problem here. + let message = CStr::from_ptr(error).into(); + Some(wrap(crate::error::DlDescription(message))) + // Since we do a copy of the error string above, maybe we should call dlerror again to + // let libdl know it may free its copy of the string now? + } + }) +} + +/// A platform-specific counterpart of the cross-platform [`Library`](crate::Library). +pub struct Library { + handle: *mut raw::c_void +} + +unsafe impl Send for Library {} + +// That being said... this section in the volume 2 of POSIX.1-2008 states: +// +// > All functions defined by this volume of POSIX.1-2008 shall be thread-safe, except that the +// > following functions need not be thread-safe. +// +// With notable absence of any dl* function other than dlerror in the list. By “this volume” +// I suppose they refer precisely to the “volume 2”. dl* family of functions are specified +// by this same volume, so the conclusion is indeed that dl* functions are required by POSIX +// to be thread-safe. Great! +// +// See for more details: +// +// * https://github.com/nagisa/rust_libloading/pull/17 +// * http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_09_01 +unsafe impl Sync for Library {} + +impl Library { + /// Find and eagerly load a shared library (module). + /// + /// If the `filename` contains a [path separator], the `filename` is interpreted as a `path` to + /// a file. Otherwise, platform-specific algorithms are employed to find a library with a + /// matching file name. + /// + /// This is equivalent to <code>[Library::open](filename, [RTLD_LAZY] | [RTLD_LOCAL])</code>. + /// + /// [path separator]: std::path::MAIN_SEPARATOR + /// + /// # Safety + /// + /// When a library is loaded, initialisation routines contained within the library are executed. + /// For the purposes of safety, the execution of these routines is conceptually the same calling an + /// unknown foreign function and may impose arbitrary requirements on the caller for the call + /// to be sound. + /// + /// Additionally, the callers of this function must also ensure that execution of the + /// termination routines contained within the library is safe as well. These routines may be + /// executed when the library is unloaded. + #[inline] + pub unsafe fn new<P: AsRef<OsStr>>(filename: P) -> Result<Library, crate::Error> { + Library::open(Some(filename), RTLD_LAZY | RTLD_LOCAL) + } + + /// Load the `Library` representing the current executable. + /// + /// [`Library::get`] calls of the returned `Library` will look for symbols in following + /// locations in order: + /// + /// 1. The original program image; + /// 2. Any executable object files (e.g. shared libraries) loaded at program startup; + /// 3. Any executable object files loaded at runtime (e.g. via other `Library::new` calls or via + /// calls to the `dlopen` function). + /// + /// Note that the behaviour of a `Library` loaded with this method is different from that of + /// Libraries loaded with [`os::windows::Library::this`]. + /// + /// This is equivalent to <code>[Library::open](None, [RTLD_LAZY] | [RTLD_LOCAL])</code>. + /// + /// [`os::windows::Library::this`]: crate::os::windows::Library::this + #[inline] + pub fn this() -> Library { + unsafe { + // SAFE: this does not load any new shared library images, no danger in it executing + // initialiser routines. + Library::open(None::<&OsStr>, RTLD_LAZY | RTLD_LOCAL).expect("this should never fail") + } + } + + /// Find and load an executable object file (shared library). + /// + /// See documentation for [`Library::this`] for further description of the behaviour + /// when the `filename` is `None`. Otherwise see [`Library::new`]. + /// + /// Corresponds to `dlopen(filename, flags)`. + /// + /// # Safety + /// + /// When a library is loaded, initialisation routines contained within the library are executed. + /// For the purposes of safety, the execution of these routines is conceptually the same calling an + /// unknown foreign function and may impose arbitrary requirements on the caller for the call + /// to be sound. + /// + /// Additionally, the callers of this function must also ensure that execution of the + /// termination routines contained within the library is safe as well. These routines may be + /// executed when the library is unloaded. + pub unsafe fn open<P>(filename: Option<P>, flags: raw::c_int) -> Result<Library, crate::Error> + where P: AsRef<OsStr> { + let filename = match filename { + None => None, + Some(ref f) => Some(cstr_cow_from_bytes(f.as_ref().as_bytes())?), + }; + with_dlerror(|desc| crate::Error::DlOpen { desc }, move || { + let result = dlopen(match filename { + None => ptr::null(), + Some(ref f) => f.as_ptr() + }, flags); + // ensure filename lives until dlopen completes + drop(filename); + if result.is_null() { + None + } else { + Some(Library { + handle: result + }) + } + }).map_err(|e| e.unwrap_or(crate::Error::DlOpenUnknown)) + } + + unsafe fn get_impl<T, F>(&self, symbol: &[u8], on_null: F) -> Result<Symbol<T>, crate::Error> + where F: FnOnce() -> Result<Symbol<T>, crate::Error> + { + ensure_compatible_types::<T, *mut raw::c_void>()?; + let symbol = cstr_cow_from_bytes(symbol)?; + // `dlsym` may return nullptr in two cases: when a symbol genuinely points to a null + // pointer or the symbol cannot be found. In order to detect this case a double dlerror + // pattern must be used, which is, sadly, a little bit racy. + // + // We try to leave as little space as possible for this to occur, but we can’t exactly + // fully prevent it. + match with_dlerror(|desc| crate::Error::DlSym { desc }, || { + dlerror(); + let symbol = dlsym(self.handle, symbol.as_ptr()); + if symbol.is_null() { + None + } else { + Some(Symbol { + pointer: symbol, + pd: marker::PhantomData + }) + } + }) { + Err(None) => on_null(), + Err(Some(e)) => Err(e), + Ok(x) => Ok(x) + } + + } + + /// Get a pointer to a function or static variable by symbol name. + /// + /// The `symbol` may not contain any null bytes, with the exception of the last byte. Providing a + /// null terminated `symbol` may help to avoid an allocation. + /// + /// Symbol is interpreted as-is; no mangling is done. This means that symbols like `x::y` are + /// most likely invalid. + /// + /// # Safety + /// + /// Users of this API must specify the correct type of the function or variable loaded. Using a + /// `Symbol` with a wrong type is undefined. + /// + /// # Platform-specific behaviour + /// + /// Implementation of thread local variables is extremely platform specific and uses of such + /// variables that work on e.g. Linux may have unintended behaviour on other targets. + /// + /// On POSIX implementations where the `dlerror` function is not confirmed to be MT-safe (such + /// as FreeBSD), this function will unconditionally return an error when the underlying `dlsym` + /// call returns a null pointer. There are rare situations where `dlsym` returns a genuine null + /// pointer without it being an error. If loading a null pointer is something you care about, + /// consider using the [`Library::get_singlethreaded`] call. + #[inline(always)] + pub unsafe fn get<T>(&self, symbol: &[u8]) -> Result<Symbol<T>, crate::Error> { + extern crate cfg_if; + cfg_if::cfg_if! { + // These targets are known to have MT-safe `dlerror`. + if #[cfg(any( + target_os = "linux", + target_os = "android", + target_os = "openbsd", + target_os = "macos", + target_os = "ios", + target_os = "solaris", + target_os = "illumos", + target_os = "redox", + target_os = "fuchsia" + ))] { + self.get_singlethreaded(symbol) + } else { + self.get_impl(symbol, || Err(crate::Error::DlSymUnknown)) + } + } + } + + /// Get a pointer to function or static variable by symbol name. + /// + /// The `symbol` may not contain any null bytes, with the exception of the last byte. Providing a + /// null terminated `symbol` may help to avoid an allocation. + /// + /// Symbol is interpreted as-is; no mangling is done. This means that symbols like `x::y` are + /// most likely invalid. + /// + /// # Safety + /// + /// Users of this API must specify the correct type of the function or variable loaded. + /// + /// It is up to the user of this library to ensure that no other calls to an MT-unsafe + /// implementation of `dlerror` occur during the execution of this function. Failing that, the + /// behaviour of this function is not defined. + /// + /// # Platform-specific behaviour + /// + /// The implementation of thread-local variables is extremely platform specific and uses of such + /// variables that work on e.g. Linux may have unintended behaviour on other targets. + #[inline(always)] + pub unsafe fn get_singlethreaded<T>(&self, symbol: &[u8]) -> Result<Symbol<T>, crate::Error> { + self.get_impl(symbol, || Ok(Symbol { + pointer: ptr::null_mut(), + pd: marker::PhantomData + })) + } + + /// Convert the `Library` to a raw handle. + /// + /// The handle returned by this function shall be usable with APIs which accept handles + /// as returned by `dlopen`. + pub fn into_raw(self) -> *mut raw::c_void { + let handle = self.handle; + mem::forget(self); + handle + } + + /// Convert a raw handle returned by `dlopen`-family of calls to a `Library`. + /// + /// # Safety + /// + /// The pointer shall be a result of a successful call of the `dlopen`-family of functions or a + /// pointer previously returned by `Library::into_raw` call. It must be valid to call `dlclose` + /// with this pointer as an argument. + pub unsafe fn from_raw(handle: *mut raw::c_void) -> Library { + Library { + handle + } + } + + /// Unload the library. + /// + /// This method might be a no-op, depending on the flags with which the `Library` was opened, + /// what library was opened or other platform specifics. + /// + /// You only need to call this if you are interested in handling any errors that may arise when + /// library is unloaded. Otherwise the implementation of `Drop` for `Library` will close the + /// library and ignore the errors were they arise. + /// + /// The underlying data structures may still get leaked if an error does occur. + pub fn close(self) -> Result<(), crate::Error> { + let result = with_dlerror(|desc| crate::Error::DlClose { desc }, || { + if unsafe { dlclose(self.handle) } == 0 { + Some(()) + } else { + None + } + }).map_err(|e| e.unwrap_or(crate::Error::DlCloseUnknown)); + // While the library is not free'd yet in case of an error, there is no reason to try + // dropping it again, because all that will do is try calling `dlclose` again. only + // this time it would ignore the return result, which we already seen failing… + std::mem::forget(self); + result + } +} + +impl Drop for Library { + fn drop(&mut self) { + unsafe { + dlclose(self.handle); + } + } +} + +impl fmt::Debug for Library { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + f.write_str(&format!("Library@{:p}", self.handle)) + } +} + +/// Symbol from a library. +/// +/// A major difference compared to the cross-platform `Symbol` is that this does not ensure that the +/// `Symbol` does not outlive the `Library` it comes from. +pub struct Symbol<T> { + pointer: *mut raw::c_void, + pd: marker::PhantomData<T> +} + +impl<T> Symbol<T> { + /// Convert the loaded `Symbol` into a raw pointer. + pub fn into_raw(self) -> *mut raw::c_void { + self.pointer + } +} + +impl<T> Symbol<Option<T>> { + /// Lift Option out of the symbol. + pub fn lift_option(self) -> Option<Symbol<T>> { + if self.pointer.is_null() { + None + } else { + Some(Symbol { + pointer: self.pointer, + pd: marker::PhantomData, + }) + } + } +} + +unsafe impl<T: Send> Send for Symbol<T> {} +unsafe impl<T: Sync> Sync for Symbol<T> {} + +impl<T> Clone for Symbol<T> { + fn clone(&self) -> Symbol<T> { + Symbol { ..*self } + } +} + +impl<T> ::std::ops::Deref for Symbol<T> { + type Target = T; + fn deref(&self) -> &T { + unsafe { + // Additional reference level for a dereference on `deref` return value. + &*(&self.pointer as *const *mut _ as *const T) + } + } +} + +impl<T> fmt::Debug for Symbol<T> { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + unsafe { + let mut info = mem::MaybeUninit::<DlInfo>::uninit(); + if dladdr(self.pointer, info.as_mut_ptr()) != 0 { + let info = info.assume_init(); + if info.dli_sname.is_null() { + f.write_str(&format!("Symbol@{:p} from {:?}", + self.pointer, + CStr::from_ptr(info.dli_fname))) + } else { + f.write_str(&format!("Symbol {:?}@{:p} from {:?}", + CStr::from_ptr(info.dli_sname), self.pointer, + CStr::from_ptr(info.dli_fname))) + } + } else { + f.write_str(&format!("Symbol@{:p}", self.pointer)) + } + } + } +} + +// Platform specific things +#[cfg_attr(any(target_os = "linux", target_os = "android"), link(name="dl"))] +#[cfg_attr(any(target_os = "freebsd", target_os = "dragonfly"), link(name="c"))] +extern { + fn dlopen(filename: *const raw::c_char, flags: raw::c_int) -> *mut raw::c_void; + fn dlclose(handle: *mut raw::c_void) -> raw::c_int; + fn dlsym(handle: *mut raw::c_void, symbol: *const raw::c_char) -> *mut raw::c_void; + fn dlerror() -> *mut raw::c_char; + fn dladdr(addr: *mut raw::c_void, info: *mut DlInfo) -> raw::c_int; +} + +#[repr(C)] +struct DlInfo { + dli_fname: *const raw::c_char, + dli_fbase: *mut raw::c_void, + dli_sname: *const raw::c_char, + dli_saddr: *mut raw::c_void +} diff --git a/vendor/libloading-0.7.4/src/os/windows/mod.rs b/vendor/libloading-0.7.4/src/os/windows/mod.rs new file mode 100644 index 000000000..e3da940a2 --- /dev/null +++ b/vendor/libloading-0.7.4/src/os/windows/mod.rs @@ -0,0 +1,532 @@ +// A hack for docs.rs to build documentation that has both windows and linux documentation in the +// same rustdoc build visible. +#[cfg(all(libloading_docs, not(windows)))] +mod windows_imports { + pub(super) enum WORD {} + pub(super) struct DWORD; + pub(super) enum HMODULE {} + pub(super) enum FARPROC {} + + pub(super) mod consts { + use super::DWORD; + pub(crate) const LOAD_IGNORE_CODE_AUTHZ_LEVEL: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_AS_DATAFILE: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_AS_IMAGE_RESOURCE: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_SEARCH_APPLICATION_DIR: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_SEARCH_DEFAULT_DIRS: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_SEARCH_SYSTEM32: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_SEARCH_USER_DIRS: DWORD = DWORD; + pub(crate) const LOAD_WITH_ALTERED_SEARCH_PATH: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_REQUIRE_SIGNED_TARGET: DWORD = DWORD; + pub(crate) const LOAD_LIBRARY_SAFE_CURRENT_DIRS: DWORD = DWORD; + } +} +#[cfg(any(not(libloading_docs), windows))] +mod windows_imports { + extern crate winapi; + pub(super) use self::winapi::shared::minwindef::{WORD, DWORD, HMODULE, FARPROC}; + pub(super) use self::winapi::shared::ntdef::WCHAR; + pub(super) use self::winapi::um::{errhandlingapi, libloaderapi}; + pub(super) use std::os::windows::ffi::{OsStrExt, OsStringExt}; + pub(super) const SEM_FAILCE: DWORD = 1; + + pub(super) mod consts { + pub(crate) use super::winapi::um::libloaderapi::{ + LOAD_IGNORE_CODE_AUTHZ_LEVEL, + LOAD_LIBRARY_AS_DATAFILE, + LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE, + LOAD_LIBRARY_AS_IMAGE_RESOURCE, + LOAD_LIBRARY_SEARCH_APPLICATION_DIR, + LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, + LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR, + LOAD_LIBRARY_SEARCH_SYSTEM32, + LOAD_LIBRARY_SEARCH_USER_DIRS, + LOAD_WITH_ALTERED_SEARCH_PATH, + LOAD_LIBRARY_REQUIRE_SIGNED_TARGET, + LOAD_LIBRARY_SAFE_CURRENT_DIRS, + }; + } +} + +use self::windows_imports::*; +use util::{ensure_compatible_types, cstr_cow_from_bytes}; +use std::ffi::{OsStr, OsString}; +use std::{fmt, io, marker, mem, ptr}; + +/// The platform-specific counterpart of the cross-platform [`Library`](crate::Library). +pub struct Library(HMODULE); + +unsafe impl Send for Library {} +// Now, this is sort-of-tricky. MSDN documentation does not really make any claims as to safety of +// the Win32 APIs. Sadly, whomever I asked, even current and former Microsoft employees, couldn’t +// say for sure whether the Win32 APIs used to implement `Library` are thread-safe or not. +// +// My investigation ended up with a question about thread-safety properties of the API involved +// being sent to an internal (to MS) general question mailing-list. The conclusion of the mail is +// as such: +// +// * Nobody inside MS (at least out of all of the people who have seen the question) knows for +// sure either; +// * However, the general consensus between MS developers is that one can rely on the API being +// thread-safe. In case it is not thread-safe it should be considered a bug on the Windows +// part. (NB: bugs filed at https://connect.microsoft.com/ against Windows Server) +unsafe impl Sync for Library {} + +impl Library { + /// Find and load a module. + /// + /// If the `filename` specifies a full path, the function only searches that path for the + /// module. Otherwise, if the `filename` specifies a relative path or a module name without a + /// path, the function uses a Windows-specific search strategy to find the module. For more + /// information, see the [Remarks on MSDN][msdn]. + /// + /// If the `filename` specifies a library filename without a path and with the extension omitted, + /// the `.dll` extension is implicitly added. This behaviour may be suppressed by appending a + /// trailing `.` to the `filename`. + /// + /// This is equivalent to <code>[Library::load_with_flags](filename, 0)</code>. + /// + /// [msdn]: https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryw#remarks + /// + /// # Safety + /// + /// When a library is loaded, initialisation routines contained within the library are executed. + /// For the purposes of safety, the execution of these routines is conceptually the same calling an + /// unknown foreign function and may impose arbitrary requirements on the caller for the call + /// to be sound. + /// + /// Additionally, the callers of this function must also ensure that execution of the + /// termination routines contained within the library is safe as well. These routines may be + /// executed when the library is unloaded. + #[inline] + pub unsafe fn new<P: AsRef<OsStr>>(filename: P) -> Result<Library, crate::Error> { + Library::load_with_flags(filename, 0) + } + + /// Get the `Library` representing the original program executable. + /// + /// Note that the behaviour of the `Library` loaded with this method is different from + /// Libraries loaded with [`os::unix::Library::this`]. For more information refer to [MSDN]. + /// + /// Corresponds to `GetModuleHandleExW(0, NULL, _)`. + /// + /// [`os::unix::Library::this`]: crate::os::unix::Library::this + /// [MSDN]: https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulehandleexw + pub fn this() -> Result<Library, crate::Error> { + unsafe { + let mut handle: HMODULE = std::ptr::null_mut(); + with_get_last_error(|source| crate::Error::GetModuleHandleExW { source }, || { + let result = libloaderapi::GetModuleHandleExW(0, std::ptr::null_mut(), &mut handle); + if result == 0 { + None + } else { + Some(Library(handle)) + } + }).map_err(|e| e.unwrap_or(crate::Error::GetModuleHandleExWUnknown)) + } + } + + /// Get a module that is already loaded by the program. + /// + /// This function returns a `Library` corresponding to a module with the given name that is + /// already mapped into the address space of the process. If the module isn't found, an error is + /// returned. + /// + /// If the `filename` does not include a full path and there are multiple different loaded + /// modules corresponding to the `filename`, it is impossible to predict which module handle + /// will be returned. For more information refer to [MSDN]. + /// + /// If the `filename` specifies a library filename without a path and with the extension omitted, + /// the `.dll` extension is implicitly added. This behaviour may be suppressed by appending a + /// trailing `.` to the `filename`. + /// + /// This is equivalent to `GetModuleHandleExW(0, filename, _)`. + /// + /// [MSDN]: https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulehandleexw + pub fn open_already_loaded<P: AsRef<OsStr>>(filename: P) -> Result<Library, crate::Error> { + let wide_filename: Vec<u16> = filename.as_ref().encode_wide().chain(Some(0)).collect(); + + let ret = unsafe { + let mut handle: HMODULE = std::ptr::null_mut(); + with_get_last_error(|source| crate::Error::GetModuleHandleExW { source }, || { + // Make sure no winapi calls as a result of drop happen inside this closure, because + // otherwise that might change the return value of the GetLastError. + let result = libloaderapi::GetModuleHandleExW(0, wide_filename.as_ptr(), &mut handle); + if result == 0 { + None + } else { + Some(Library(handle)) + } + }).map_err(|e| e.unwrap_or(crate::Error::GetModuleHandleExWUnknown)) + }; + + drop(wide_filename); // Drop wide_filename here to ensure it doesn’t get moved and dropped + // inside the closure by mistake. See comment inside the closure. + ret + } + + /// Find and load a module, additionally adjusting behaviour with flags. + /// + /// See [`Library::new`] for documentation on the handling of the `filename` argument. See the + /// [flag table on MSDN][flags] for information on applicable values for the `flags` argument. + /// + /// Corresponds to `LoadLibraryExW(filename, reserved: NULL, flags)`. + /// + /// [flags]: https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters + /// + /// # Safety + /// + /// When a library is loaded, initialisation routines contained within the library are executed. + /// For the purposes of safety, the execution of these routines is conceptually the same calling an + /// unknown foreign function and may impose arbitrary requirements on the caller for the call + /// to be sound. + /// + /// Additionally, the callers of this function must also ensure that execution of the + /// termination routines contained within the library is safe as well. These routines may be + /// executed when the library is unloaded. + pub unsafe fn load_with_flags<P: AsRef<OsStr>>(filename: P, flags: DWORD) -> Result<Library, crate::Error> { + let wide_filename: Vec<u16> = filename.as_ref().encode_wide().chain(Some(0)).collect(); + let _guard = ErrorModeGuard::new(); + + let ret = with_get_last_error(|source| crate::Error::LoadLibraryExW { source }, || { + // Make sure no winapi calls as a result of drop happen inside this closure, because + // otherwise that might change the return value of the GetLastError. + let handle = + libloaderapi::LoadLibraryExW(wide_filename.as_ptr(), std::ptr::null_mut(), flags); + if handle.is_null() { + None + } else { + Some(Library(handle)) + } + }).map_err(|e| e.unwrap_or(crate::Error::LoadLibraryExWUnknown)); + drop(wide_filename); // Drop wide_filename here to ensure it doesn’t get moved and dropped + // inside the closure by mistake. See comment inside the closure. + ret + } + + /// Get a pointer to a function or static variable by symbol name. + /// + /// The `symbol` may not contain any null bytes, with the exception of the last byte. A null + /// terminated `symbol` may avoid a string allocation in some cases. + /// + /// Symbol is interpreted as-is; no mangling is done. This means that symbols like `x::y` are + /// most likely invalid. + /// + /// # Safety + /// + /// Users of this API must specify the correct type of the function or variable loaded. + pub unsafe fn get<T>(&self, symbol: &[u8]) -> Result<Symbol<T>, crate::Error> { + ensure_compatible_types::<T, FARPROC>()?; + let symbol = cstr_cow_from_bytes(symbol)?; + with_get_last_error(|source| crate::Error::GetProcAddress { source }, || { + let symbol = libloaderapi::GetProcAddress(self.0, symbol.as_ptr()); + if symbol.is_null() { + None + } else { + Some(Symbol { + pointer: symbol, + pd: marker::PhantomData + }) + } + }).map_err(|e| e.unwrap_or(crate::Error::GetProcAddressUnknown)) + } + + /// Get a pointer to a function or static variable by ordinal number. + /// + /// # Safety + /// + /// Users of this API must specify the correct type of the function or variable loaded. + pub unsafe fn get_ordinal<T>(&self, ordinal: WORD) -> Result<Symbol<T>, crate::Error> { + ensure_compatible_types::<T, FARPROC>()?; + with_get_last_error(|source| crate::Error::GetProcAddress { source }, || { + let ordinal = ordinal as usize as *mut _; + let symbol = libloaderapi::GetProcAddress(self.0, ordinal); + if symbol.is_null() { + None + } else { + Some(Symbol { + pointer: symbol, + pd: marker::PhantomData + }) + } + }).map_err(|e| e.unwrap_or(crate::Error::GetProcAddressUnknown)) + } + + /// Convert the `Library` to a raw handle. + pub fn into_raw(self) -> HMODULE { + let handle = self.0; + mem::forget(self); + handle + } + + /// Convert a raw handle to a `Library`. + /// + /// # Safety + /// + /// The handle must be the result of a successful call of `LoadLibraryA`, `LoadLibraryW`, + /// `LoadLibraryExW`, or `LoadLibraryExA`, or a handle previously returned by the + /// `Library::into_raw` call. + pub unsafe fn from_raw(handle: HMODULE) -> Library { + Library(handle) + } + + /// Unload the library. + /// + /// You only need to call this if you are interested in handling any errors that may arise when + /// library is unloaded. Otherwise this will be done when `Library` is dropped. + /// + /// The underlying data structures may still get leaked if an error does occur. + pub fn close(self) -> Result<(), crate::Error> { + let result = with_get_last_error(|source| crate::Error::FreeLibrary { source }, || { + if unsafe { libloaderapi::FreeLibrary(self.0) == 0 } { + None + } else { + Some(()) + } + }).map_err(|e| e.unwrap_or(crate::Error::FreeLibraryUnknown)); + // While the library is not free'd yet in case of an error, there is no reason to try + // dropping it again, because all that will do is try calling `FreeLibrary` again. only + // this time it would ignore the return result, which we already seen failing... + std::mem::forget(self); + result + } +} + +impl Drop for Library { + fn drop(&mut self) { + unsafe { libloaderapi::FreeLibrary(self.0); } + } +} + +impl fmt::Debug for Library { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + unsafe { + // FIXME: use Maybeuninit::uninit_array when stable + let mut buf = + mem::MaybeUninit::<[mem::MaybeUninit::<WCHAR>; 1024]>::uninit().assume_init(); + let len = libloaderapi::GetModuleFileNameW(self.0, + buf[..].as_mut_ptr().cast(), 1024) as usize; + if len == 0 { + f.write_str(&format!("Library@{:p}", self.0)) + } else { + let string: OsString = OsString::from_wide( + // FIXME: use Maybeuninit::slice_get_ref when stable + &*(&buf[..len] as *const [_] as *const [WCHAR]) + ); + f.write_str(&format!("Library@{:p} from {:?}", self.0, string)) + } + } + } +} + +/// A symbol from a library. +/// +/// A major difference compared to the cross-platform `Symbol` is that this does not ensure that the +/// `Symbol` does not outlive the `Library` that it comes from. +pub struct Symbol<T> { + pointer: FARPROC, + pd: marker::PhantomData<T> +} + +impl<T> Symbol<T> { + /// Convert the loaded `Symbol` into a handle. + pub fn into_raw(self) -> FARPROC { + self.pointer + } +} + +impl<T> Symbol<Option<T>> { + /// Lift Option out of the symbol. + pub fn lift_option(self) -> Option<Symbol<T>> { + if self.pointer.is_null() { + None + } else { + Some(Symbol { + pointer: self.pointer, + pd: marker::PhantomData, + }) + } + } +} + +unsafe impl<T: Send> Send for Symbol<T> {} +unsafe impl<T: Sync> Sync for Symbol<T> {} + +impl<T> Clone for Symbol<T> { + fn clone(&self) -> Symbol<T> { + Symbol { ..*self } + } +} + +impl<T> ::std::ops::Deref for Symbol<T> { + type Target = T; + fn deref(&self) -> &T { + unsafe { + // Additional reference level for a dereference on `deref` return value. + &*(&self.pointer as *const *mut _ as *const T) + } + } +} + +impl<T> fmt::Debug for Symbol<T> { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + f.write_str(&format!("Symbol@{:p}", self.pointer)) + } +} + +struct ErrorModeGuard(DWORD); + +impl ErrorModeGuard { + #[allow(clippy::if_same_then_else)] + fn new() -> Option<ErrorModeGuard> { + unsafe { + let mut previous_mode = 0; + if errhandlingapi::SetThreadErrorMode(SEM_FAILCE, &mut previous_mode) == 0 { + // How in the world is it possible for what is essentially a simple variable swap + // to fail? For now we just ignore the error -- the worst that can happen here is + // the previous mode staying on and user seeing a dialog error on older Windows + // machines. + None + } else if previous_mode == SEM_FAILCE { + None + } else { + Some(ErrorModeGuard(previous_mode)) + } + } + } +} + +impl Drop for ErrorModeGuard { + fn drop(&mut self) { + unsafe { + errhandlingapi::SetThreadErrorMode(self.0, ptr::null_mut()); + } + } +} + +fn with_get_last_error<T, F>(wrap: fn(crate::error::WindowsError) -> crate::Error, closure: F) +-> Result<T, Option<crate::Error>> +where F: FnOnce() -> Option<T> { + closure().ok_or_else(|| { + let error = unsafe { errhandlingapi::GetLastError() }; + if error == 0 { + None + } else { + Some(wrap(crate::error::WindowsError(io::Error::from_raw_os_error(error as i32)))) + } + }) +} + +/// Do not check AppLocker rules or apply Software Restriction Policies for the DLL. +/// +/// This action applies only to the DLL being loaded and not to its dependencies. This value is +/// recommended for use in setup programs that must run extracted DLLs during installation. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_IGNORE_CODE_AUTHZ_LEVEL: DWORD = consts::LOAD_IGNORE_CODE_AUTHZ_LEVEL; + +/// Map the file into the calling process’ virtual address space as if it were a data file. +/// +/// Nothing is done to execute or prepare to execute the mapped file. Therefore, you cannot call +/// functions like [`Library::get`] with this DLL. Using this value causes writes to read-only +/// memory to raise an access violation. Use this flag when you want to load a DLL only to extract +/// messages or resources from it. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_AS_DATAFILE: DWORD = consts::LOAD_LIBRARY_AS_DATAFILE; + +/// Map the file into the calling process’ virtual address space as if it were a data file. +/// +/// Similar to [`LOAD_LIBRARY_AS_DATAFILE`], except that the DLL file is opened with exclusive +/// write access for the calling process. Other processes cannot open the DLL file for write access +/// while it is in use. However, the DLL can still be opened by other processes. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE: DWORD = consts::LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE; + +/// Map the file into the process’ virtual address space as an image file. +/// +/// The loader does not load the static imports or perform the other usual initialisation steps. +/// Use this flag when you want to load a DLL only to extract messages or resources from it. +/// +/// Unless the application depends on the file having the in-memory layout of an image, this value +/// should be used with either [`LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE`] or +/// [`LOAD_LIBRARY_AS_DATAFILE`]. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_AS_IMAGE_RESOURCE: DWORD = consts::LOAD_LIBRARY_AS_IMAGE_RESOURCE; + +/// Search the application's installation directory for the DLL and its dependencies. +/// +/// Directories in the standard search path are not searched. This value cannot be combined with +/// [`LOAD_WITH_ALTERED_SEARCH_PATH`]. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_SEARCH_APPLICATION_DIR: DWORD = consts::LOAD_LIBRARY_SEARCH_APPLICATION_DIR; + +/// Search default directories when looking for the DLL and its dependencies. +/// +/// This value is a combination of [`LOAD_LIBRARY_SEARCH_APPLICATION_DIR`], +/// [`LOAD_LIBRARY_SEARCH_SYSTEM32`], and [`LOAD_LIBRARY_SEARCH_USER_DIRS`]. Directories in the +/// standard search path are not searched. This value cannot be combined with +/// [`LOAD_WITH_ALTERED_SEARCH_PATH`]. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_SEARCH_DEFAULT_DIRS: DWORD = consts::LOAD_LIBRARY_SEARCH_DEFAULT_DIRS; + +/// Directory that contains the DLL is temporarily added to the beginning of the list of +/// directories that are searched for the DLL’s dependencies. +/// +/// Directories in the standard search path are not searched. +/// +/// The `filename` parameter must specify a fully qualified path. This value cannot be combined +/// with [`LOAD_WITH_ALTERED_SEARCH_PATH`]. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR: DWORD = consts::LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR; + +/// Search `%windows%\system32` for the DLL and its dependencies. +/// +/// Directories in the standard search path are not searched. This value cannot be combined with +/// [`LOAD_WITH_ALTERED_SEARCH_PATH`]. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_SEARCH_SYSTEM32: DWORD = consts::LOAD_LIBRARY_SEARCH_SYSTEM32; + +/// Directories added using the `AddDllDirectory` or the `SetDllDirectory` function are searched +/// for the DLL and its dependencies. +/// +/// If more than one directory has been added, the order in which the directories are searched is +/// unspecified. Directories in the standard search path are not searched. This value cannot be +/// combined with [`LOAD_WITH_ALTERED_SEARCH_PATH`]. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_SEARCH_USER_DIRS: DWORD = consts::LOAD_LIBRARY_SEARCH_USER_DIRS; + +/// If `filename` specifies an absolute path, the system uses the alternate file search strategy +/// discussed in the [Remarks section] to find associated executable modules that the specified +/// module causes to be loaded. +/// +/// If this value is used and `filename` specifies a relative path, the behaviour is undefined. +/// +/// If this value is not used, or if `filename` does not specify a path, the system uses the +/// standard search strategy discussed in the [Remarks section] to find associated executable +/// modules that the specified module causes to be loaded. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +/// +/// [Remarks]: https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#remarks +pub const LOAD_WITH_ALTERED_SEARCH_PATH: DWORD = consts::LOAD_WITH_ALTERED_SEARCH_PATH; + +/// Specifies that the digital signature of the binary image must be checked at load time. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_REQUIRE_SIGNED_TARGET: DWORD = consts::LOAD_LIBRARY_REQUIRE_SIGNED_TARGET; + +/// Allow loading a DLL for execution from the current directory only if it is under a directory in +/// the Safe load list. +/// +/// See [flag documentation on MSDN](https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw#parameters). +pub const LOAD_LIBRARY_SAFE_CURRENT_DIRS: DWORD = consts::LOAD_LIBRARY_SAFE_CURRENT_DIRS; |