//! Main evaluator loop and setting up the initial stack frame.
+use std::convert::TryFrom;
use std::ffi::OsStr;
use rand::rngs::StdRng;
use rand::SeedableRng;
+use log::info;
-use rustc::ty::layout::{LayoutOf, Size};
-use rustc::ty::{self, TyCtxt};
use rustc_hir::def_id::DefId;
+use rustc_middle::ty::{self, layout::LayoutCx, TyCtxt};
+use rustc_target::abi::LayoutOf;
use crate::*;
pub validate: bool,
/// Determines if Stacked Borrows is enabled.
pub stacked_borrows: bool,
+ /// Determines if alignment checking is enabled.
+ pub check_alignment: bool,
/// Determines if communication with the host environment is enabled.
pub communicate: bool,
/// Determines if memory leaks should be ignored.
pub args: Vec<String>,
/// The seed to use when non-determinism or randomness are required (e.g. ptr-to-int cast, `getrandom()`).
pub seed: Option<u64>,
- /// The stacked borrow id to report about
+ /// The stacked borrows pointer id to report about
pub tracked_pointer_tag: Option<PtrId>,
+ /// The stacked borrows call ID to report about
+ pub tracked_call_id: Option<CallId>,
/// The allocation id to report about.
pub tracked_alloc_id: Option<AllocId>,
}
MiriConfig {
validate: true,
stacked_borrows: true,
+ check_alignment: true,
communicate: false,
ignore_leaks: false,
excluded_env_vars: vec![],
args: vec![],
seed: None,
tracked_pointer_tag: None,
+ tracked_call_id: None,
tracked_alloc_id: None,
}
}
}
-/// Details of premature program termination.
-pub enum TerminationInfo {
- Exit(i64),
- Abort,
-}
-
/// Returns a freshly created `InterpCx`, along with an `MPlaceTy` representing
/// the location where the return value of the `start` lang item will be
/// written to.
tcx: TyCtxt<'tcx>,
main_id: DefId,
config: MiriConfig,
-) -> InterpResult<'tcx, (InterpCx<'mir, 'tcx, Evaluator<'tcx>>, MPlaceTy<'tcx, Tag>)> {
+) -> InterpResult<'tcx, (InterpCx<'mir, 'tcx, Evaluator<'mir, 'tcx>>, MPlaceTy<'tcx, Tag>)> {
+ let param_env = ty::ParamEnv::reveal_all();
+ let layout_cx = LayoutCx { tcx, param_env };
let mut ecx = InterpCx::new(
- tcx.at(rustc_span::source_map::DUMMY_SP),
- ty::ParamEnv::reveal_all(),
- Evaluator::new(config.communicate, config.validate),
+ tcx,
+ rustc_span::source_map::DUMMY_SP,
+ param_env,
+ Evaluator::new(config.communicate, config.validate, layout_cx),
MemoryExtra::new(
StdRng::seed_from_u64(config.seed.unwrap_or(0)),
config.stacked_borrows,
config.tracked_pointer_tag,
+ config.tracked_call_id,
config.tracked_alloc_id,
+ config.check_alignment,
),
);
// Complete initialization.
start_id,
tcx.mk_substs(::std::iter::once(ty::subst::GenericArg::from(main_ret_ty))),
)
+ .unwrap()
.unwrap();
// First argument: pointer to `main()`.
let main_ptr = ecx.memory.create_fn_alloc(FnVal::Instance(main_instance));
// Second argument (argc): length of `config.args`.
- let argc = Scalar::from_uint(config.args.len() as u128, ecx.pointer_size());
+ let argc = Scalar::from_machine_usize(u64::try_from(config.args.len()).unwrap(), &ecx);
// Third argument (`argv`): created from `config.args`.
let argv = {
// Put each argument in memory, collect pointers.
let mut argvs = Vec::<Scalar<Tag>>::new();
for arg in config.args.iter() {
// Make space for `0` terminator.
- let size = arg.len() as u64 + 1;
+ let size = u64::try_from(arg.len()).unwrap().checked_add(1).unwrap();
let arg_type = tcx.mk_array(tcx.types.u8, size);
let arg_place = ecx.allocate(ecx.layout_of(arg_type)?, MiriMemoryKind::Machine.into());
ecx.write_os_str_to_c_str(OsStr::new(arg), arg_place.ptr, size)?;
}
// Make an array with all these pointers, in the Miri memory.
let argvs_layout =
- ecx.layout_of(tcx.mk_array(tcx.mk_imm_ptr(tcx.types.u8), argvs.len() as u64))?;
+ ecx.layout_of(tcx.mk_array(tcx.mk_imm_ptr(tcx.types.u8), u64::try_from(argvs.len()).unwrap()))?;
let argvs_place = ecx.allocate(argvs_layout, MiriMemoryKind::Machine.into());
for (idx, arg) in argvs.into_iter().enumerate() {
- let place = ecx.mplace_field(argvs_place, idx as u64)?;
+ let place = ecx.mplace_field(argvs_place, idx)?;
ecx.write_scalar(arg, place.into())?;
}
ecx.memory.mark_immutable(argvs_place.ptr.assert_ptr().alloc_id)?;
// Store `argc` and `argv` for macOS `_NSGetArg{c,v}`.
{
let argc_place =
- ecx.allocate(ecx.layout_of(tcx.types.isize)?, MiriMemoryKind::Machine.into());
+ ecx.allocate(ecx.machine.layouts.isize, MiriMemoryKind::Machine.into());
ecx.write_scalar(argc, argc_place.into())?;
ecx.machine.argc = Some(argc_place.ptr);
cmd.push(std::char::from_u32(0).unwrap());
let cmd_utf16: Vec<u16> = cmd.encode_utf16().collect();
- let cmd_type = tcx.mk_array(tcx.types.u16, cmd_utf16.len() as u64);
+ let cmd_type = tcx.mk_array(tcx.types.u16, u64::try_from(cmd_utf16.len()).unwrap());
let cmd_place = ecx.allocate(ecx.layout_of(cmd_type)?, MiriMemoryKind::Machine.into());
ecx.machine.cmd_line = Some(cmd_place.ptr);
// Store the UTF-16 string. We just allocated so we know the bounds are fine.
- let char_size = Size::from_bytes(2);
for (idx, &c) in cmd_utf16.iter().enumerate() {
- let place = ecx.mplace_field(cmd_place, idx as u64)?;
- ecx.write_scalar(Scalar::from_uint(c, char_size), place.into())?;
+ let place = ecx.mplace_field(cmd_place, idx)?;
+ ecx.write_scalar(Scalar::from_u16(c), place.into())?;
}
}
argv
};
// Return place (in static memory so that it does not count as leak).
- let ret_place = ecx.allocate(ecx.layout_of(tcx.types.isize)?, MiriMemoryKind::Machine.into());
+ let ret_place = ecx.allocate(ecx.machine.layouts.isize, MiriMemoryKind::Machine.into());
// Call start function.
ecx.call_function(
start_instance,
)?;
// Set the last_error to 0
- let errno_layout = ecx.layout_of(tcx.types.u32)?;
+ let errno_layout = ecx.machine.layouts.u32;
let errno_place = ecx.allocate(errno_layout, MiriMemoryKind::Machine.into());
ecx.write_scalar(Scalar::from_u32(0), errno_place.into())?;
ecx.machine.last_error = Some(errno_place);
/// Returns `Some(return_code)` if program executed completed.
/// Returns `None` if an evaluation error occured.
pub fn eval_main<'tcx>(tcx: TyCtxt<'tcx>, main_id: DefId, config: MiriConfig) -> Option<i64> {
- // FIXME: We always ignore leaks on some platforms where we do not
- // correctly implement TLS destructors.
- let target_os = tcx.sess.target.target.target_os.as_str();
- let ignore_leaks = config.ignore_leaks || target_os == "windows" || target_os == "macos";
+ // Copy setting before we move `config`.
+ let ignore_leaks = config.ignore_leaks;
let (mut ecx, ret_place) = match create_ecx(tcx, main_id, config) {
Ok(v) => v,
- Err(mut err) => {
+ Err(err) => {
err.print_backtrace();
- panic!("Miri initialziation error: {}", err.kind)
+ panic!("Miri initialization error: {}", err.kind)
}
};
// Perform the main execution.
let res: InterpResult<'_, i64> = (|| {
- while ecx.step()? {
- ecx.process_diagnostics();
+ // Main loop.
+ loop {
+ let info = ecx.preprocess_diagnostics();
+ match ecx.schedule()? {
+ SchedulingAction::ExecuteStep => {
+ assert!(ecx.step()?, "a terminated thread was scheduled for execution");
+ }
+ SchedulingAction::ExecuteTimeoutCallback => {
+ assert!(ecx.machine.communicate,
+ "scheduler callbacks require disabled isolation, but the code \
+ that created the callback did not check it");
+ ecx.run_timeout_callback()?;
+ }
+ SchedulingAction::ExecuteDtors => {
+ // This will either enable the thread again (so we go back
+ // to `ExecuteStep`), or determine that this thread is done
+ // for good.
+ ecx.schedule_next_tls_dtor_for_active_thread()?;
+ }
+ SchedulingAction::Stop => {
+ break;
+ }
+ }
+ ecx.process_diagnostics(info);
}
- // Read the return code pointer *before* we run TLS destructors, to assert
- // that it was written to by the time that `start` lang item returned.
- let return_code = ecx.read_scalar(ret_place.into())?.not_undef()?.to_machine_isize(&ecx)?;
- ecx.run_tls_dtors()?;
+ let return_code = ecx.read_scalar(ret_place.into())?.check_init()?.to_machine_isize(&ecx)?;
Ok(return_code)
})();
+ // Machine cleanup.
+ EnvVars::cleanup(&mut ecx).unwrap();
+
// Process the result.
match res {
Ok(return_code) => {
if !ignore_leaks {
- let leaks = ecx.memory.leak_report();
+ info!("Additonal static roots: {:?}", ecx.machine.static_roots);
+ let leaks = ecx.memory.leak_report(&ecx.machine.static_roots);
if leaks != 0 {
tcx.sess.err("the evaluated program leaked memory");
// Ignore the provided return code - let the reported error
}
Some(return_code)
}
- Err(e) => report_diagnostic(&ecx, e),
+ Err(e) => report_error(&ecx, e),
}
}
projects / rust.git / blobdiff