//! Main evaluator loop and setting up the initial stack frame.
use std::ffi::OsStr;
+use std::convert::TryFrom;
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_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.
pub seed: Option<u64>,
/// The stacked borrow id to report about
pub tracked_pointer_tag: Option<PtrId>,
+ /// The allocation id to report about.
+ pub tracked_alloc_id: Option<AllocId>,
}
-/// Details of premature program termination.
-pub enum TerminationInfo {
- Exit(i64),
- PoppedTrackedPointerTag(Item),
- Abort,
+impl Default for MiriConfig {
+ fn default() -> MiriConfig {
+ MiriConfig {
+ validate: true,
+ stacked_borrows: true,
+ communicate: false,
+ ignore_leaks: false,
+ excluded_env_vars: vec![],
+ args: vec![],
+ seed: None,
+ tracked_pointer_tag: None,
+ tracked_alloc_id: None,
+ }
+ }
}
/// Returns a freshly created `InterpCx`, along with an `MPlaceTy` representing
config: MiriConfig,
) -> InterpResult<'tcx, (InterpCx<'mir, 'tcx, Evaluator<'tcx>>, MPlaceTy<'tcx, Tag>)> {
let mut ecx = InterpCx::new(
- tcx.at(syntax::source_map::DUMMY_SP),
+ 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,
+ config.tracked_alloc_id,
),
);
// Complete initialization.
- EnvVars::init(&mut ecx, config.excluded_env_vars);
+ EnvVars::init(&mut ecx, config.excluded_env_vars)?;
+ MemoryExtra::init_extern_statics(&mut ecx)?;
// Setup first stack-frame
let main_instance = ty::Instance::mono(tcx, main_id);
let main_mir = ecx.load_mir(main_instance.def, None)?;
-
- if !main_mir.return_ty().is_unit() || main_mir.arg_count != 0 {
- throw_unsup_format!("miri does not support main functions without `fn()` type signatures");
+ if main_mir.arg_count != 0 {
+ bug!("main function must not take any arguments");
}
let start_id = tcx.lang_items().start_fn().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_uint(u64::try_from(config.args.len()).unwrap(), ecx.pointer_size());
// 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::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());
+ 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, u64::try_from(idx).unwrap())?;
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::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);
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_place = ecx.allocate(ecx.layout_of(cmd_type)?, MiriMemoryKind::Env.into());
+ 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)?;
+ let place = ecx.mplace_field(cmd_place, u64::try_from(idx).unwrap())?;
ecx.write_scalar(Scalar::from_uint(c, char_size), place.into())?;
}
}
};
// 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);
/// 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
+ // FIXME: We always ignore leaks on some OSs 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) {
Ok(v) => v,
Err(mut err) => {
err.print_backtrace();
- panic!("Miri initialziation error: {}", err.kind)
+ panic!("Miri initialization error: {}", err.kind)
}
};
// 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)?;
return None;
}
}
- return Some(return_code);
- }
- Err(mut e) => {
- // 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);
- }
- }
- // Let the reported error determine the return code.
- return None;
+ Some(return_code)
}
+ Err(e) => report_error(&ecx, e),
}
}
projects / rust.git / blobdiff