1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
#![feature(rustc_private)]
#![feature(cell_update)]
#![feature(const_option)]
#![feature(float_gamma)]
#![feature(map_try_insert)]
#![feature(never_type)]
#![feature(try_blocks)]
#![feature(io_error_more)]
#![feature(variant_count)]
#![feature(yeet_expr)]
#![feature(nonzero_ops)]
#![feature(let_chains)]
#![feature(lint_reasons)]
#![feature(trait_upcasting)]
#![feature(strict_overflow_ops)]
#![feature(is_none_or)]
// Configure clippy and other lints
#![allow(
    clippy::collapsible_else_if,
    clippy::collapsible_if,
    clippy::if_same_then_else,
    clippy::comparison_chain,
    clippy::enum_variant_names,
    clippy::field_reassign_with_default,
    clippy::manual_map,
    clippy::neg_cmp_op_on_partial_ord,
    clippy::new_without_default,
    clippy::single_match,
    clippy::useless_format,
    clippy::derive_partial_eq_without_eq,
    clippy::derived_hash_with_manual_eq,
    clippy::too_many_arguments,
    clippy::type_complexity,
    clippy::single_element_loop,
    clippy::needless_return,
    clippy::bool_to_int_with_if,
    clippy::box_default,
    clippy::needless_question_mark,
    clippy::needless_lifetimes,
    rustc::diagnostic_outside_of_impl,
    // We are not implementing queries here so it's fine
    rustc::potential_query_instability,
    rustc::untranslatable_diagnostic,
)]
#![warn(
    rust_2018_idioms,
    clippy::cast_possible_wrap, // unsigned -> signed
    clippy::cast_sign_loss, // signed -> unsigned
    clippy::cast_lossless,
    clippy::cast_possible_truncation,
)]
// Needed for rustdoc from bootstrap (with `-Znormalize-docs`).
#![recursion_limit = "256"]

// Some "regular" crates we want to share with rustc
extern crate either;
extern crate tracing;

// The rustc crates we need
extern crate rustc_apfloat;
extern crate rustc_ast;
extern crate rustc_const_eval;
extern crate rustc_data_structures;
extern crate rustc_errors;
extern crate rustc_hir;
extern crate rustc_index;
extern crate rustc_middle;
extern crate rustc_session;
extern crate rustc_span;
extern crate rustc_target;
// Linking `rustc_driver` pulls in the required  object code as the rest of the rustc crates are
// shipped only as rmeta files.
#[allow(unused_extern_crates)]
extern crate rustc_driver;

mod alloc_addresses;
mod alloc_bytes;
mod borrow_tracker;
mod clock;
mod concurrency;
mod diagnostics;
mod eval;
mod helpers;
mod intrinsics;
mod machine;
mod mono_hash_map;
mod operator;
mod provenance_gc;
mod range_map;
mod shims;

// Establish a "crate-wide prelude": we often import `crate::*`.
use rustc_middle::{bug, span_bug};
use tracing::{info, trace};

// Make all those symbols available in the same place as our own.
#[doc(no_inline)]
pub use rustc_const_eval::interpret::*;
// Resolve ambiguity.
#[doc(no_inline)]
pub use rustc_const_eval::interpret::{self, AllocMap, Provenance as _};

// Type aliases that set the provenance parameter.
pub type Pointer = interpret::Pointer<Option<machine::Provenance>>;
pub type StrictPointer = interpret::Pointer<machine::Provenance>;
pub type Scalar = interpret::Scalar<machine::Provenance>;
pub type ImmTy<'tcx> = interpret::ImmTy<'tcx, machine::Provenance>;
pub type OpTy<'tcx> = interpret::OpTy<'tcx, machine::Provenance>;
pub type PlaceTy<'tcx> = interpret::PlaceTy<'tcx, machine::Provenance>;
pub type MPlaceTy<'tcx> = interpret::MPlaceTy<'tcx, machine::Provenance>;

pub use crate::intrinsics::EvalContextExt as _;
pub use crate::shims::env::{EnvVars, EvalContextExt as _};
pub use crate::shims::foreign_items::{DynSym, EvalContextExt as _};
pub use crate::shims::os_str::EvalContextExt as _;
pub use crate::shims::panic::{CatchUnwindData, EvalContextExt as _};
pub use crate::shims::time::EvalContextExt as _;
pub use crate::shims::tls::TlsData;
pub use crate::shims::EmulateItemResult;

pub use crate::alloc_addresses::{EvalContextExt as _, ProvenanceMode};
pub use crate::alloc_bytes::MiriAllocBytes;
pub use crate::borrow_tracker::stacked_borrows::{
    EvalContextExt as _, Item, Permission, Stack, Stacks,
};
pub use crate::borrow_tracker::tree_borrows::{EvalContextExt as _, Tree};
pub use crate::borrow_tracker::{
    BorTag, BorrowTrackerMethod, CallId, EvalContextExt as _, RetagFields,
};
pub use crate::clock::{Clock, Instant};
pub use crate::concurrency::{
    data_race::{AtomicFenceOrd, AtomicReadOrd, AtomicRwOrd, AtomicWriteOrd, EvalContextExt as _},
    init_once::{EvalContextExt as _, InitOnceId},
    sync::{CondvarId, EvalContextExt as _, MutexId, RwLockId, SynchronizationObjects},
    thread::{
        BlockReason, EvalContextExt as _, StackEmptyCallback, ThreadId, ThreadManager,
        TimeoutAnchor, TimeoutClock, UnblockCallback,
    },
};
pub use crate::diagnostics::{
    report_error, EvalContextExt as _, NonHaltingDiagnostic, TerminationInfo,
};
pub use crate::eval::{
    create_ecx, eval_entry, AlignmentCheck, BacktraceStyle, IsolatedOp, MiriConfig, RejectOpWith,
};
pub use crate::helpers::{AccessKind, EvalContextExt as _};
pub use crate::machine::{
    AllocExtra, FrameExtra, MemoryKind, MiriInterpCx, MiriInterpCxExt, MiriMachine, MiriMemoryKind,
    PrimitiveLayouts, Provenance, ProvenanceExtra,
};
pub use crate::mono_hash_map::MonoHashMap;
pub use crate::operator::EvalContextExt as _;
pub use crate::provenance_gc::{EvalContextExt as _, LiveAllocs, VisitProvenance, VisitWith};
pub use crate::range_map::RangeMap;

/// Insert rustc arguments at the beginning of the argument list that Miri wants to be
/// set per default, for maximal validation power.
/// Also disable the MIR pass that inserts an alignment check on every pointer dereference. Miri
/// does that too, and with a better error message.
pub const MIRI_DEFAULT_ARGS: &[&str] = &[
    "--cfg=miri",
    "-Zalways-encode-mir",
    "-Zextra-const-ub-checks",
    "-Zmir-emit-retag",
    "-Zmir-keep-place-mention",
    "-Zmir-opt-level=0",
    "-Zmir-enable-passes=-CheckAlignment",
    // Deduplicating diagnostics means we miss events when tracking what happens during an
    // execution. Let's not do that.
    "-Zdeduplicate-diagnostics=no",
];