use rand::rngs::StdRng;
use rand::SeedableRng;
-use rustc_hir::def_id::DefId;
use rustc::ty::layout::{LayoutOf, Size};
use rustc::ty::{self, TyCtxt};
-use rustc_mir::interpret::InterpErrorInfo;
+use rustc_hir::def_id::DefId;
use crate::*;
/// Configuration needed to spawn a Miri instance.
#[derive(Clone)]
pub struct MiriConfig {
- /// Determine if validity checking and Stacked Borrows are enabled.
+ /// Determine if validity checking is enabled.
pub validate: bool,
+ /// Determines if Stacked Borrows is enabled.
+ pub stacked_borrows: bool,
/// Determines if communication with the host environment is enabled.
pub communicate: bool,
/// Determines if memory leaks should be ignored.
/// Details of premature program termination.
pub enum TerminationInfo {
Exit(i64),
- PoppedTrackedPointerTag(Item),
Abort,
}
let mut ecx = InterpCx::new(
tcx.at(rustc_span::source_map::DUMMY_SP),
ty::ParamEnv::reveal_all(),
- Evaluator::new(config.communicate),
+ Evaluator::new(config.communicate, config.validate),
MemoryExtra::new(
StdRng::seed_from_u64(config.seed.unwrap_or(0)),
- config.validate,
+ config.stacked_borrows,
config.tracked_pointer_tag,
),
);
// Make space for `0` terminator.
let size = arg.len() as u64 + 1;
let arg_type = tcx.mk_array(tcx.types.u8, size);
- let arg_place = ecx.allocate(ecx.layout_of(arg_type)?, MiriMemoryKind::Env.into());
+ 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)?;
argvs.push(arg_place.ptr);
}
// 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))?;
- let argvs_place = ecx.allocate(argvs_layout, MiriMemoryKind::Env.into());
+ 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)?;
ecx.write_scalar(arg, place.into())?;
// Store `argc` and `argv` for macOS `_NSGetArg{c,v}`.
{
let argc_place =
- ecx.allocate(ecx.layout_of(tcx.types.isize)?, MiriMemoryKind::Env.into());
+ ecx.allocate(ecx.layout_of(tcx.types.isize)?, MiriMemoryKind::Machine.into());
ecx.write_scalar(argc, argc_place.into())?;
ecx.machine.argc = Some(argc_place.ptr);
let argv_place = ecx.allocate(
ecx.layout_of(tcx.mk_imm_ptr(tcx.types.unit))?,
- MiriMemoryKind::Env.into(),
+ MiriMemoryKind::Machine.into(),
);
ecx.write_scalar(argv, argv_place.into())?;
ecx.machine.argv = Some(argv_place.ptr);
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_place = ecx.allocate(ecx.layout_of(cmd_type)?, MiriMemoryKind::Env.into());
+ 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);
};
// 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::Env.into());
+ let ret_place = ecx.allocate(ecx.layout_of(tcx.types.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_place = ecx.allocate(errno_layout, MiriMemoryKind::Env.into());
+ 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);
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.to_lowercase();
+ let target_os = tcx.sess.target.target.target_os.as_str();
let ignore_leaks = config.ignore_leaks || target_os == "windows" || target_os == "macos";
let (mut ecx, ret_place) = match create_ecx(tcx, main_id, config) {
// Perform the main execution.
let res: InterpResult<'_, i64> = (|| {
- ecx.run()?;
+ while ecx.step()? {
+ ecx.process_diagnostics();
+ }
// 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)?;
}
Some(return_code)
}
- Err(e) => report_err(&ecx, e),
- }
-}
-
-fn report_err<'tcx, 'mir>(
- ecx: &InterpCx<'mir, 'tcx, Evaluator<'tcx>>,
- mut e: InterpErrorInfo<'tcx>,
-) -> Option<i64> {
- // Special treatment for some error kinds
- let msg = match e.kind {
- InterpError::MachineStop(ref info) => {
- let info = info.downcast_ref::<TerminationInfo>().expect("invalid MachineStop payload");
- match info {
- TerminationInfo::Exit(code) => return Some(*code),
- TerminationInfo::PoppedTrackedPointerTag(item) =>
- format!("popped tracked tag for item {:?}", item),
- TerminationInfo::Abort => format!("the evaluated program aborted execution"),
- }
- }
- err_unsup!(NoMirFor(..)) => format!(
- "{}. Did you set `MIRI_SYSROOT` to a Miri-enabled sysroot? You can prepare one with `cargo miri setup`.",
- e
- ),
- InterpError::InvalidProgram(_) => bug!("This error should be impossible in Miri: {}", e),
- _ => e.to_string(),
- };
- e.print_backtrace();
- if let Some(frame) = ecx.stack().last() {
- let span = frame.current_source_info().unwrap().span;
-
- let msg = format!("Miri evaluation error: {}", msg);
- let mut err = ecx.tcx.sess.struct_span_err(span, msg.as_str());
- let frames = ecx.generate_stacktrace(None);
- err.span_label(span, msg);
- // We iterate with indices because we need to look at the next frame (the caller).
- for idx in 0..frames.len() {
- let frame_info = &frames[idx];
- let call_site_is_local = frames
- .get(idx + 1)
- .map_or(false, |caller_info| caller_info.instance.def_id().is_local());
- if call_site_is_local {
- err.span_note(frame_info.call_site, &frame_info.to_string());
- } else {
- err.note(&frame_info.to_string());
- }
- }
- err.emit();
- } else {
- ecx.tcx.sess.err(&msg);
- }
-
- for (i, frame) in ecx.stack().iter().enumerate() {
- trace!("-------------------");
- trace!("Frame {}", i);
- trace!(" return: {:?}", frame.return_place.map(|p| *p));
- for (i, local) in frame.locals.iter().enumerate() {
- trace!(" local {}: {:?}", i, local.value);
- }
+ Err(e) => report_diagnostic(&ecx, e),
}
- // Let the reported error determine the return code.
- return None;
}
projects / rust.git / blobdiff