-use std::{
- convert::{TryFrom, TryInto},
- iter,
-};
+use std::{collections::hash_map::Entry, iter};
use log::trace;
use rustc_middle::mir;
use rustc_middle::ty;
use rustc_session::config::CrateType;
-use rustc_span::{symbol::sym, Symbol};
+use rustc_span::Symbol;
use rustc_target::{
abi::{Align, Size},
spec::abi::Abi,
};
use super::backtrace::EvalContextExt as _;
+use crate::helpers::convert::Truncate;
use crate::*;
/// Returned by `emulate_foreign_item_by_name`.
/// Jumping has already been taken care of.
AlreadyJumped,
/// A MIR body has been found for the function
- MirBody(&'mir mir::Body<'tcx>),
+ MirBody(&'mir mir::Body<'tcx>, ty::Instance<'tcx>),
/// The item is not supported.
NotSupported,
}
fn min_align(&self, size: u64, kind: MiriMemoryKind) -> Align {
let this = self.eval_context_ref();
// List taken from `libstd/sys_common/alloc.rs`.
- let min_align = match this.tcx.sess.target.arch.as_str() {
+ let min_align = match this.tcx.sess.target.arch.as_ref() {
"x86" | "arm" | "mips" | "powerpc" | "powerpc64" | "asmjs" | "wasm32" => 8,
"x86_64" | "aarch64" | "mips64" | "s390x" | "sparc64" => 16,
arch => bug!("Unsupported target architecture: {}", arch),
Ok(Pointer::null())
} else {
let align = this.min_align(size, kind);
- let ptr = this.memory.allocate(Size::from_bytes(size), align, kind.into())?;
+ let ptr = this.allocate_ptr(Size::from_bytes(size), align, kind.into())?;
if zero_init {
// We just allocated this, the access is definitely in-bounds.
- this.memory.write_bytes(ptr.into(), iter::repeat(0u8).take(size as usize)).unwrap();
+ this.write_bytes_ptr(ptr.into(), iter::repeat(0u8).take(size as usize)).unwrap();
}
Ok(ptr.into())
}
fn free(&mut self, ptr: Pointer<Option<Tag>>, kind: MiriMemoryKind) -> InterpResult<'tcx> {
let this = self.eval_context_mut();
if !this.ptr_is_null(ptr)? {
- this.memory.deallocate(ptr, None, kind.into())?;
+ this.deallocate_ptr(ptr, None, kind.into())?;
}
Ok(())
}
Ok(Pointer::null())
} else {
let new_ptr =
- this.memory.allocate(Size::from_bytes(new_size), new_align, kind.into())?;
+ this.allocate_ptr(Size::from_bytes(new_size), new_align, kind.into())?;
Ok(new_ptr.into())
}
} else {
if new_size == 0 {
- this.memory.deallocate(old_ptr, None, kind.into())?;
+ this.deallocate_ptr(old_ptr, None, kind.into())?;
Ok(Pointer::null())
} else {
- let new_ptr = this.memory.reallocate(
+ let new_ptr = this.reallocate_ptr(
old_ptr,
None,
Size::from_bytes(new_size),
fn lookup_exported_symbol(
&mut self,
link_name: Symbol,
- ) -> InterpResult<'tcx, Option<&'mir mir::Body<'tcx>>> {
+ ) -> InterpResult<'tcx, Option<(&'mir mir::Body<'tcx>, ty::Instance<'tcx>)>> {
let this = self.eval_context_mut();
let tcx = this.tcx.tcx;
// If the result was cached, just return it.
- if let Some(instance) = this.machine.exported_symbols_cache.get(&link_name) {
- return instance.map(|instance| this.load_mir(instance.def, None)).transpose();
- }
-
- // Find it if it was not cached.
- let mut instance_and_crate: Option<(ty::Instance<'_>, CrateNum)> = None;
- // `dependency_formats` includes all the transitive informations needed to link a crate,
- // which is what we need here since we need to dig out `exported_symbols` from all transitive
- // dependencies.
- let dependency_formats = tcx.dependency_formats(());
- let dependency_format = dependency_formats
- .iter()
- .find(|(crate_type, _)| *crate_type == CrateType::Executable)
- .expect("interpreting a non-executable crate");
- for cnum in
- iter::once(LOCAL_CRATE).chain(dependency_format.1.iter().enumerate().filter_map(
- |(num, &linkage)| (linkage != Linkage::NotLinked).then_some(CrateNum::new(num + 1)),
- ))
- {
- // We can ignore `_export_level` here: we are a Rust crate, and everything is exported
- // from a Rust crate.
- for &(symbol, _export_level) in tcx.exported_symbols(cnum) {
- if let ExportedSymbol::NonGeneric(def_id) = symbol {
- let attrs = tcx.codegen_fn_attrs(def_id);
- let symbol_name = if let Some(export_name) = attrs.export_name {
- export_name
- } else if attrs.flags.contains(CodegenFnAttrFlags::NO_MANGLE) {
- tcx.item_name(def_id)
- } else {
- // Skip over items without an explicitly defined symbol name.
- continue;
- };
- if symbol_name == link_name {
- if let Some((original_instance, original_cnum)) = instance_and_crate {
- // Make sure we are consistent wrt what is 'first' and 'second'.
- let original_span = tcx.def_span(original_instance.def_id()).data();
- let span = tcx.def_span(def_id).data();
- if original_span < span {
- throw_machine_stop!(TerminationInfo::MultipleSymbolDefinitions {
- link_name,
- first: original_span,
- first_crate: tcx.crate_name(original_cnum),
- second: span,
- second_crate: tcx.crate_name(cnum),
- });
+ // (Cannot use `or_insert` since the code below might have to throw an error.)
+ let entry = this.machine.exported_symbols_cache.entry(link_name);
+ let instance = *match entry {
+ Entry::Occupied(e) => e.into_mut(),
+ Entry::Vacant(e) => {
+ // Find it if it was not cached.
+ let mut instance_and_crate: Option<(ty::Instance<'_>, CrateNum)> = None;
+ // `dependency_formats` includes all the transitive informations needed to link a crate,
+ // which is what we need here since we need to dig out `exported_symbols` from all transitive
+ // dependencies.
+ let dependency_formats = tcx.dependency_formats(());
+ let dependency_format = dependency_formats
+ .iter()
+ .find(|(crate_type, _)| *crate_type == CrateType::Executable)
+ .expect("interpreting a non-executable crate");
+ for cnum in iter::once(LOCAL_CRATE).chain(
+ dependency_format.1.iter().enumerate().filter_map(|(num, &linkage)| {
+ (linkage != Linkage::NotLinked).then_some(CrateNum::new(num + 1))
+ }),
+ ) {
+ // We can ignore `_export_info` here: we are a Rust crate, and everything is exported
+ // from a Rust crate.
+ for &(symbol, _export_info) in tcx.exported_symbols(cnum) {
+ if let ExportedSymbol::NonGeneric(def_id) = symbol {
+ let attrs = tcx.codegen_fn_attrs(def_id);
+ let symbol_name = if let Some(export_name) = attrs.export_name {
+ export_name
+ } else if attrs.flags.contains(CodegenFnAttrFlags::NO_MANGLE) {
+ tcx.item_name(def_id)
} else {
- throw_machine_stop!(TerminationInfo::MultipleSymbolDefinitions {
- link_name,
- first: span,
- first_crate: tcx.crate_name(cnum),
- second: original_span,
- second_crate: tcx.crate_name(original_cnum),
- });
+ // Skip over items without an explicitly defined symbol name.
+ continue;
+ };
+ if symbol_name == link_name {
+ if let Some((original_instance, original_cnum)) = instance_and_crate
+ {
+ // Make sure we are consistent wrt what is 'first' and 'second'.
+ let original_span =
+ tcx.def_span(original_instance.def_id()).data();
+ let span = tcx.def_span(def_id).data();
+ if original_span < span {
+ throw_machine_stop!(
+ TerminationInfo::MultipleSymbolDefinitions {
+ link_name,
+ first: original_span,
+ first_crate: tcx.crate_name(original_cnum),
+ second: span,
+ second_crate: tcx.crate_name(cnum),
+ }
+ );
+ } else {
+ throw_machine_stop!(
+ TerminationInfo::MultipleSymbolDefinitions {
+ link_name,
+ first: span,
+ first_crate: tcx.crate_name(cnum),
+ second: original_span,
+ second_crate: tcx.crate_name(original_cnum),
+ }
+ );
+ }
+ }
+ if !matches!(tcx.def_kind(def_id), DefKind::Fn | DefKind::AssocFn) {
+ throw_ub_format!(
+ "attempt to call an exported symbol that is not defined as a function"
+ );
+ }
+ instance_and_crate = Some((ty::Instance::mono(tcx, def_id), cnum));
}
}
- if !matches!(tcx.def_kind(def_id), DefKind::Fn | DefKind::AssocFn) {
- throw_ub_format!(
- "attempt to call an exported symbol that is not defined as a function"
- );
- }
- instance_and_crate = Some((ty::Instance::mono(tcx, def_id), cnum));
}
}
+
+ e.insert(instance_and_crate.map(|ic| ic.0))
}
+ };
+ match instance {
+ None => Ok(None), // no symbol with this name
+ Some(instance) => Ok(Some((this.load_mir(instance.def, None)?, instance))),
}
-
- let instance = instance_and_crate.map(|ic| ic.0);
- // Cache it and load its MIR, if found.
- this.machine.exported_symbols_cache.try_insert(link_name, instance).unwrap();
- instance.map(|instance| this.load_mir(instance.def, None)).transpose()
}
/// Emulates calling a foreign item, failing if the item is not supported.
args: &[OpTy<'tcx, Tag>],
ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
unwind: StackPopUnwind,
- ) -> InterpResult<'tcx, Option<&'mir mir::Body<'tcx>>> {
+ ) -> InterpResult<'tcx, Option<(&'mir mir::Body<'tcx>, ty::Instance<'tcx>)>> {
let this = self.eval_context_mut();
- let attrs = this.tcx.get_attrs(def_id);
- let link_name = this
- .tcx
- .sess
- .first_attr_value_str_by_name(&attrs, sym::link_name)
- .unwrap_or_else(|| this.tcx.item_name(def_id));
+ let link_name = this.item_link_name(def_id);
let tcx = this.tcx.tcx;
// First: functions that diverge.
this.check_abi_and_shim_symbol_clash(abi, Abi::Rust, link_name)?;
let panic_impl_id = tcx.lang_items().panic_impl().unwrap();
let panic_impl_instance = ty::Instance::mono(tcx, panic_impl_id);
- return Ok(Some(&*this.load_mir(panic_impl_instance.def, None)?));
+ return Ok(Some((
+ &*this.load_mir(panic_impl_instance.def, None)?,
+ panic_impl_instance,
+ )));
}
#[rustfmt::skip]
| "exit"
} else {
Abi::System { unwind: false }
};
- let &[ref code] = this.check_shim(abi, exp_abi, link_name, args)?;
+ let [code] = this.check_shim(abi, exp_abi, link_name, args)?;
// it's really u32 for ExitProcess, but we have to put it into the `Exit` variant anyway
let code = this.read_scalar(code)?.to_i32()?;
throw_machine_stop!(TerminationInfo::Exit(code.into()));
}
"abort" => {
- let &[] =
- this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
throw_machine_stop!(TerminationInfo::Abort(
"the program aborted execution".to_owned()
))
this.go_to_block(ret);
}
EmulateByNameResult::AlreadyJumped => (),
- EmulateByNameResult::MirBody(mir) => return Ok(Some(mir)),
+ EmulateByNameResult::MirBody(mir, instance) => return Ok(Some((mir, instance))),
EmulateByNameResult::NotSupported => {
if let Some(body) = this.lookup_exported_symbol(link_name)? {
return Ok(Some(body));
match allocator_kind {
AllocatorKind::Global => {
- let body = this
+ let (body, instance) = this
.lookup_exported_symbol(symbol)?
.expect("symbol should be present if there is a global allocator");
- Ok(EmulateByNameResult::MirBody(body))
+ Ok(EmulateByNameResult::MirBody(body, instance))
}
AllocatorKind::Default => {
default(this)?;
match &*link_name.as_str() {
// Miri-specific extern functions
"miri_static_root" => {
- let &[ref ptr] = this.check_shim(abi, Abi::Rust, link_name, args)?;
+ let [ptr] = this.check_shim(abi, Abi::Rust, link_name, args)?;
let ptr = this.read_pointer(ptr)?;
- let (alloc_id, offset, _) = this.memory.ptr_get_alloc(ptr)?;
+ let (alloc_id, offset, _) = this.ptr_get_alloc_id(ptr)?;
if offset != Size::ZERO {
throw_unsup_format!("pointer passed to miri_static_root must point to beginning of an allocated block");
}
this.machine.static_roots.push(alloc_id);
}
+ // Obtains the size of a Miri backtrace. See the README for details.
+ "miri_backtrace_size" => {
+ this.handle_miri_backtrace_size(abi, link_name, args, dest)?;
+ }
+
// Obtains a Miri backtrace. See the README for details.
"miri_get_backtrace" => {
// `check_shim` happens inside `handle_miri_get_backtrace`.
this.handle_miri_resolve_frame(abi, link_name, args, dest)?;
}
+ // Writes the function and file names of a Miri backtrace frame into a user provided buffer. See the README for details.
+ "miri_resolve_frame_names" => {
+ this.handle_miri_resolve_frame_names(abi, link_name, args)?;
+ }
// Standard C allocation
"malloc" => {
- let &[ref size] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [size] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
let size = this.read_scalar(size)?.to_machine_usize(this)?;
let res = this.malloc(size, /*zero_init:*/ false, MiriMemoryKind::C)?;
this.write_pointer(res, dest)?;
}
"calloc" => {
- let &[ref items, ref len] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [items, len] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
let items = this.read_scalar(items)?.to_machine_usize(this)?;
let len = this.read_scalar(len)?.to_machine_usize(this)?;
let size =
this.write_pointer(res, dest)?;
}
"free" => {
- let &[ref ptr] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [ptr] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
let ptr = this.read_pointer(ptr)?;
this.free(ptr, MiriMemoryKind::C)?;
}
"realloc" => {
- let &[ref old_ptr, ref new_size] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [old_ptr, new_size] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
let old_ptr = this.read_pointer(old_ptr)?;
let new_size = this.read_scalar(new_size)?.to_machine_usize(this)?;
let res = this.realloc(old_ptr, new_size, MiriMemoryKind::C)?;
// Rust allocation
"__rust_alloc" => {
- let &[ref size, ref align] = this.check_shim(abi, Abi::Rust, link_name, args)?;
+ let [size, align] = this.check_shim(abi, Abi::Rust, link_name, args)?;
let size = this.read_scalar(size)?.to_machine_usize(this)?;
let align = this.read_scalar(align)?.to_machine_usize(this)?;
return this.emulate_allocator(Symbol::intern("__rg_alloc"), |this| {
Self::check_alloc_request(size, align)?;
- let ptr = this.memory.allocate(
+ let ptr = this.allocate_ptr(
Size::from_bytes(size),
Align::from_bytes(align).unwrap(),
MiriMemoryKind::Rust.into(),
});
}
"__rust_alloc_zeroed" => {
- let &[ref size, ref align] = this.check_shim(abi, Abi::Rust, link_name, args)?;
+ let [size, align] = this.check_shim(abi, Abi::Rust, link_name, args)?;
let size = this.read_scalar(size)?.to_machine_usize(this)?;
let align = this.read_scalar(align)?.to_machine_usize(this)?;
return this.emulate_allocator(Symbol::intern("__rg_alloc_zeroed"), |this| {
Self::check_alloc_request(size, align)?;
- let ptr = this.memory.allocate(
+ let ptr = this.allocate_ptr(
Size::from_bytes(size),
Align::from_bytes(align).unwrap(),
MiriMemoryKind::Rust.into(),
)?;
// We just allocated this, the access is definitely in-bounds.
- this.memory.write_bytes(ptr.into(), iter::repeat(0u8).take(usize::try_from(size).unwrap())).unwrap();
+ this.write_bytes_ptr(ptr.into(), iter::repeat(0u8).take(usize::try_from(size).unwrap())).unwrap();
this.write_pointer(ptr, dest)
});
}
"__rust_dealloc" => {
- let &[ref ptr, ref old_size, ref align] = this.check_shim(abi, Abi::Rust, link_name, args)?;
+ let [ptr, old_size, align] = this.check_shim(abi, Abi::Rust, link_name, args)?;
let ptr = this.read_pointer(ptr)?;
let old_size = this.read_scalar(old_size)?.to_machine_usize(this)?;
let align = this.read_scalar(align)?.to_machine_usize(this)?;
return this.emulate_allocator(Symbol::intern("__rg_dealloc"), |this| {
// No need to check old_size/align; we anyway check that they match the allocation.
- this.memory.deallocate(
+ this.deallocate_ptr(
ptr,
Some((Size::from_bytes(old_size), Align::from_bytes(align).unwrap())),
MiriMemoryKind::Rust.into(),
});
}
"__rust_realloc" => {
- let &[ref ptr, ref old_size, ref align, ref new_size] = this.check_shim(abi, Abi::Rust, link_name, args)?;
+ let [ptr, old_size, align, new_size] = this.check_shim(abi, Abi::Rust, link_name, args)?;
let ptr = this.read_pointer(ptr)?;
let old_size = this.read_scalar(old_size)?.to_machine_usize(this)?;
let align = this.read_scalar(align)?.to_machine_usize(this)?;
Self::check_alloc_request(new_size, align)?;
let align = Align::from_bytes(align).unwrap();
- let new_ptr = this.memory.reallocate(
+ let new_ptr = this.reallocate_ptr(
ptr,
Some((Size::from_bytes(old_size), align)),
Size::from_bytes(new_size),
// C memory handling functions
"memcmp" => {
- let &[ref left, ref right, ref n] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [left, right, n] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
let left = this.read_pointer(left)?;
let right = this.read_pointer(right)?;
let n = Size::from_bytes(this.read_scalar(n)?.to_machine_usize(this)?);
let result = {
- let left_bytes = this.memory.read_bytes(left, n)?;
- let right_bytes = this.memory.read_bytes(right, n)?;
+ let left_bytes = this.read_bytes_ptr(left, n)?;
+ let right_bytes = this.read_bytes_ptr(right, n)?;
use std::cmp::Ordering::*;
match left_bytes.cmp(right_bytes) {
this.write_scalar(Scalar::from_i32(result), dest)?;
}
"memrchr" => {
- let &[ref ptr, ref val, ref num] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [ptr, val, num] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
let ptr = this.read_pointer(ptr)?;
let val = this.read_scalar(val)?.to_i32()? as u8;
let num = this.read_scalar(num)?.to_machine_usize(this)?;
if let Some(idx) = this
- .memory
- .read_bytes(ptr, Size::from_bytes(num))?
+ .read_bytes_ptr(ptr, Size::from_bytes(num))?
.iter()
.rev()
.position(|&c| c == val)
}
}
"memchr" => {
- let &[ref ptr, ref val, ref num] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [ptr, val, num] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
let ptr = this.read_pointer(ptr)?;
let val = this.read_scalar(val)?.to_i32()? as u8;
let num = this.read_scalar(num)?.to_machine_usize(this)?;
let idx = this
- .memory
- .read_bytes(ptr, Size::from_bytes(num))?
+ .read_bytes_ptr(ptr, Size::from_bytes(num))?
.iter()
.position(|&c| c == val);
if let Some(idx) = idx {
}
}
"strlen" => {
- let &[ref ptr] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [ptr] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
let ptr = this.read_pointer(ptr)?;
let n = this.read_c_str(ptr)?.len();
this.write_scalar(Scalar::from_machine_usize(u64::try_from(n).unwrap(), this), dest)?;
| "asinf"
| "atanf"
=> {
- let &[ref f] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [f] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
// FIXME: Using host floats.
let f = f32::from_bits(this.read_scalar(f)?.to_u32()?);
let f = match &*link_name.as_str() {
| "hypotf"
| "atan2f"
=> {
- let &[ref f1, ref f2] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [f1, f2] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
// underscore case for windows, here and below
// (see https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/floating-point-primitives?view=vs-2019)
// FIXME: Using host floats.
| "asin"
| "atan"
=> {
- let &[ref f] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [f] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
// FIXME: Using host floats.
let f = f64::from_bits(this.read_scalar(f)?.to_u64()?);
let f = match &*link_name.as_str() {
| "hypot"
| "atan2"
=> {
- let &[ref f1, ref f2] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [f1, f2] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
// FIXME: Using host floats.
let f1 = f64::from_bits(this.read_scalar(f1)?.to_u64()?);
let f2 = f64::from_bits(this.read_scalar(f2)?.to_u64()?);
| "ldexp"
| "scalbn"
=> {
- let &[ref x, ref exp] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [x, exp] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
// For radix-2 (binary) systems, `ldexp` and `scalbn` are the same.
let x = this.read_scalar(x)?.to_f64()?;
let exp = this.read_scalar(exp)?.to_i32()?;
}
// Architecture-specific shims
+ "llvm.x86.addcarry.64" if this.tcx.sess.target.arch == "x86_64" => {
+ // Computes u8+u64+u64, returning tuple (u8,u64) comprising the output carry and truncated sum.
+ let [c_in, a, b] = this.check_shim(abi, Abi::Unadjusted, link_name, args)?;
+ let c_in = this.read_scalar(c_in)?.to_u8()?;
+ let a = this.read_scalar(a)?.to_u64()?;
+ let b = this.read_scalar(b)?.to_u64()?;
+
+ let wide_sum = u128::from(c_in) + u128::from(a) + u128::from(b);
+ let (c_out, sum) = ((wide_sum >> 64).truncate::<u8>(), wide_sum.truncate::<u64>());
+
+ let c_out_field = this.place_field(dest, 0)?;
+ this.write_scalar(Scalar::from_u8(c_out), &c_out_field)?;
+ let sum_field = this.place_field(dest, 1)?;
+ this.write_scalar(Scalar::from_u64(sum), &sum_field)?;
+ }
"llvm.x86.sse2.pause" if this.tcx.sess.target.arch == "x86" || this.tcx.sess.target.arch == "x86_64" => {
- let &[] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+ let [] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
this.yield_active_thread();
}
"llvm.aarch64.isb" if this.tcx.sess.target.arch == "aarch64" => {
- let &[ref arg] = this.check_shim(abi, Abi::Unadjusted, link_name, args)?;
+ let [arg] = this.check_shim(abi, Abi::Unadjusted, link_name, args)?;
let arg = this.read_scalar(arg)?.to_i32()?;
match arg {
15 => { // SY ("full system scope")
}
// Platform-specific shims
- _ => match this.tcx.sess.target.os.as_str() {
+ _ => match this.tcx.sess.target.os.as_ref() {
"linux" | "macos" => return shims::posix::foreign_items::EvalContextExt::emulate_foreign_item_by_name(this, link_name, abi, args, dest, ret),
"windows" => return shims::windows::foreign_items::EvalContextExt::emulate_foreign_item_by_name(this, link_name, abi, args, dest, ret),
target => throw_unsup_format!("the target `{}` is not supported", target),
projects / rust.git / blobdiff