Auto merge of rust-lang#2367 - RalfJung:ui-test-regex, r=RalfJung

use ui_test regex capabilities

We can have more precise patterns now, so use them for some of the tests where that makes sense. :)

tests/fail/alloc/global_system_mixup.rs

@@ -1,6 +1,6 @@
 // Make sure we detect when the `Global` and `System` allocators are mixed
 // (even when the default `Global` uses `System`).
-//@error-pattern: which is Rust heap memory, using
+//@error-pattern: /deallocating .*, which is Rust heap memory, using .* heap deallocation operation/
 
 //@normalize-stderr-test: "using [A-Za-z]+ heap deallocation operation" -> "using PLATFORM heap deallocation operation"
 //@normalize-stderr-test: "\| +\^+" -> "| ^"

tests/fail/alloc/stack_free.rs

@@ -1,7 +1,7 @@
 // Validation/SB changes why we fail
 //@compile-flags: -Zmiri-disable-validation -Zmiri-disable-stacked-borrows
 
-//@error-pattern: which is stack variable memory, using Rust heap deallocation operation
+//@error-pattern: /deallocating .*, which is stack variable memory, using Rust heap deallocation operation/
 
 fn main() {
     let x = 42;

tests/fail/provenance/ptr_int_unexposed.rs

@@ -8,5 +8,5 @@ fn main() {
     let x_usize: usize = x_ptr.addr();
     // Cast back an address that did *not* get exposed.
     let ptr = std::ptr::from_exposed_addr::<i32>(x_usize);
-    assert_eq!(unsafe { *ptr }, 3); //~ ERROR: Undefined Behavior: dereferencing pointer failed
+    assert_eq!(unsafe { *ptr }, 3); //~ ERROR: is a dangling pointer
 }

tests/fail/stacked_borrows/alias_through_mutation.rs

@@ -11,5 +11,5 @@ fn main() {
     retarget(&mut target_alias, target);
     // now `target_alias` points to the same thing as `target`
     *target = 13;
-    let _val = *target_alias; //~ ERROR: borrow stack
+    let _val = *target_alias; //~ ERROR: /read access .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/box_exclusive_violation1.rs

@@ -1,4 +1,4 @@
-fn demo_mut_advanced_unique(mut our: Box<i32>) -> i32 {
+fn demo_box_advanced_unique(mut our: Box<i32>) -> i32 {
     unknown_code_1(&*our);
 
     // This "re-asserts" uniqueness of the reference: After writing, we know
@@ -24,10 +24,10 @@ fn unknown_code_1(x: &i32) {
 
 fn unknown_code_2() {
     unsafe {
-        *LEAK = 7; //~ ERROR: borrow stack
+        *LEAK = 7; //~ ERROR: /write access .* tag does not exist in the borrow stack/
     }
 }
 
 fn main() {
-    demo_mut_advanced_unique(Box::new(0));
+    demo_box_advanced_unique(Box::new(0));
 }

tests/fail/stacked_borrows/box_exclusive_violation1.stderr

@@ -21,15 +21,15 @@ LL |     *our = 5;
    |     ^^^^^^^^
    = note: backtrace:
    = note: inside `unknown_code_2` at $DIR/box_exclusive_violation1.rs:LL:CC
-note: inside `demo_mut_advanced_unique` at $DIR/box_exclusive_violation1.rs:LL:CC
+note: inside `demo_box_advanced_unique` at $DIR/box_exclusive_violation1.rs:LL:CC
   --> $DIR/box_exclusive_violation1.rs:LL:CC
    |
 LL |     unknown_code_2();
    |     ^^^^^^^^^^^^^^^^
 note: inside `main` at $DIR/box_exclusive_violation1.rs:LL:CC
   --> $DIR/box_exclusive_violation1.rs:LL:CC
    |
-LL |     demo_mut_advanced_unique(Box::new(0));
+LL |     demo_box_advanced_unique(Box::new(0));
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace

tests/fail/stacked_borrows/buggy_as_mut_slice.rs

@@ -11,5 +11,5 @@ fn main() {
     let v1 = safe::as_mut_slice(&v);
     let _v2 = safe::as_mut_slice(&v);
     v1[1] = 5;
-    //~^ ERROR: borrow stack
+    //~^ ERROR: /write access .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/buggy_split_at_mut.rs

@@ -19,7 +19,7 @@ mod safe {
 fn main() {
     let mut array = [1, 2, 3, 4];
     let (a, b) = safe::split_at_mut(&mut array, 0);
-    //~^ ERROR: borrow stack
+    //~^ ERROR: /reborrow .* tag does not exist in the borrow stack/
     a[1] = 5;
     b[1] = 6;
 }

tests/fail/stacked_borrows/exposed_only_ro.rs

@@ -8,5 +8,5 @@ fn main() {
     let _fool = &mut x as *mut i32; // this would have fooled the old untagged pointer logic
     let addr = (&x as *const i32).expose_addr();
     let ptr = std::ptr::from_exposed_addr_mut::<i32>(addr);
-    unsafe { *ptr = 0 }; //~ ERROR: borrow stack
+    unsafe { *ptr = 0 }; //~ ERROR: /write access using <wildcard> .* no exposed tags have suitable permission in the borrow stack/
 }

tests/fail/stacked_borrows/illegal_read1.rs

@@ -8,7 +8,7 @@ fn main() {
     let xref = unsafe { &mut *xraw }; // derived from raw, so using raw is still ok...
     callee(xraw);
     let _val = *xref; // ...but any use of raw will invalidate our ref.
-    //~^ ERROR: borrow stack
+    //~^ ERROR: /read access .* tag does not exist in the borrow stack/
 }
 
 fn callee(xraw: *mut i32) {

tests/fail/stacked_borrows/illegal_read2.rs

@@ -8,7 +8,7 @@ fn main() {
     let xref = unsafe { &mut *xraw }; // derived from raw, so using raw is still ok...
     callee(xraw);
     let _val = *xref; // ...but any use of raw will invalidate our ref.
-    //~^ ERROR: borrow stack
+    //~^ ERROR: /read access .* tag does not exist in the borrow stack/
 }
 
 fn callee(xraw: *mut i32) {

tests/fail/stacked_borrows/illegal_read3.rs

@@ -18,7 +18,7 @@ fn main() {
     callee(xref1_sneaky);
     // ... though any use of it will invalidate our ref.
     let _val = *xref2;
-    //~^ ERROR: borrow stack
+    //~^ ERROR: /read access .* tag does not exist in the borrow stack/
 }
 
 fn callee(xref1: HiddenRef) {

tests/fail/stacked_borrows/illegal_read4.rs

@@ -5,5 +5,5 @@ fn main() {
     let xraw = xref1 as *mut _;
     let xref2 = unsafe { &mut *xraw };
     let _val = unsafe { *xraw }; // use the raw again, this invalidates xref2 *even* with the special read except for uniq refs
-    let _illegal = *xref2; //~ ERROR: borrow stack
+    let _illegal = *xref2; //~ ERROR: /read access .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/illegal_read5.rs

@@ -14,5 +14,5 @@ fn main() {
     let _val = *xref; // we can even still use our mutable reference
     mem::forget(unsafe { ptr::read(xshr) }); // but after reading through the shared ref
     let _val = *xref; // the mutable one is dead and gone
-    //~^ ERROR: borrow stack
+    //~^ ERROR: /read access .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/illegal_read6.rs

@@ -5,6 +5,6 @@ fn main() {
         let raw = x as *mut _;
         let x = &mut *x; // kill `raw`
         let _y = &*x; // this should not activate `raw` again
-        let _val = *raw; //~ ERROR: borrow stack
+        let _val = *raw; //~ ERROR: /read access .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/illegal_read7.rs

@@ -17,6 +17,6 @@ fn main() {
         // without invalidating `x`.  That would be bad!  It would mean that creating `shr`
         // leaked `x` to `raw`.
         let _val = ptr::read(raw);
-        let _val = *x.get_mut(); //~ ERROR: borrow stack
+        let _val = *x.get_mut(); //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/illegal_read8.rs

@@ -10,6 +10,6 @@ fn main() {
         let _val = *y2;
         let _val = *y1;
         *y2 += 1;
-        let _fail = *y1; //~ ERROR: borrow stack
+        let _fail = *y1; //~ ERROR: /read access .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/illegal_read_despite_exposed1.rs

@@ -12,6 +12,6 @@ fn main() {
         // And we test that it has uniqueness by doing a conflicting write.
         *exposed_ptr = 0;
         // Stack: Unknown(<N)
-        let _val = *root2; //~ ERROR: borrow stack
+        let _val = *root2; //~ ERROR: /read access .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/illegal_read_despite_exposed2.rs

@@ -15,6 +15,6 @@ fn main() {
         // Stack: Unknown(<N), Disabled(N)
         // collapsed to Unknown(<N)
         // Stack if _fool existed: Unknown(<N), Disabled(N), SRW(N+1); collapsed to Unknown(<N+2) which would not cause an ERROR
-        let _val = *root2; //~ ERROR: borrow stack
+        let _val = *root2; //~ ERROR: /read access .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/illegal_write1.rs

@@ -3,7 +3,7 @@ fn main() {
     let xref = &*target;
     {
         let x: *mut u32 = xref as *const _ as *mut _;
-        unsafe { *x = 42 }; //~ ERROR: only grants SharedReadOnly permission
+        unsafe { *x = 42 }; //~ ERROR: /write access .* tag only grants SharedReadOnly permission/
     }
     let _x = *xref;
 }

tests/fail/stacked_borrows/illegal_write2.rs

@@ -3,6 +3,6 @@ fn main() {
     let target2 = target as *mut _;
     drop(&mut *target); // reborrow
     // Now make sure our ref is still the only one.
-    unsafe { *target2 = 13 }; //~ ERROR: borrow stack
+    unsafe { *target2 = 13 }; //~ ERROR: /write access .* tag does not exist in the borrow stack/
     let _val = *target;
 }

tests/fail/stacked_borrows/illegal_write3.rs

@@ -3,6 +3,6 @@ fn main() {
     // Make sure raw ptr with raw tag cannot mutate frozen location without breaking the shared ref.
     let r#ref = ⌖ // freeze
     let ptr = r#ref as *const _ as *mut _; // raw ptr, with raw tag
-    unsafe { *ptr = 42 }; //~ ERROR: only grants SharedReadOnly permission
+    unsafe { *ptr = 42 }; //~ ERROR: /write access .* only grants SharedReadOnly permission/
     let _val = *r#ref;
 }

tests/fail/stacked_borrows/illegal_write4.rs

@@ -9,5 +9,5 @@ fn main() {
     let _ptr = reference as *const _ as *mut i32; // raw ptr, with raw tag
     let _mut_ref: &mut i32 = unsafe { mem::transmute(raw) }; // &mut, with raw tag
     // Now we retag, making our ref top-of-stack -- and, in particular, unfreezing.
-    let _val = *reference; //~ ERROR: borrow stack
+    let _val = *reference; //~ ERROR: /read access .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/illegal_write5.rs

@@ -8,7 +8,7 @@ fn main() {
     callee(xraw);
     // ... though any use of raw value will invalidate our ref.
     let _val = *xref;
-    //~^ ERROR: borrow stack
+    //~^ ERROR: /read access .* tag does not exist in the borrow stack/
 }
 
 fn callee(xraw: *mut i32) {

tests/fail/stacked_borrows/illegal_write6.rs

@@ -7,6 +7,6 @@ fn main() {
 fn foo(a: &mut u32, y: *mut u32) -> u32 {
     *a = 1;
     let _b = &*a;
-    unsafe { *y = 2 }; //~ ERROR: not granting access to tag
+    unsafe { *y = 2 }; //~ ERROR: /not granting access .* because incompatible item .* is protected/
     return *a;
 }

tests/fail/stacked_borrows/illegal_write_despite_exposed1.rs

@@ -9,8 +9,9 @@ fn main() {
         let root2 = &*exposed_ptr;
         // Stack: Unknown(<N), SRO(N), SRO(N+1)
         // And we test that it is read-only by doing a conflicting write.
+        // (The write is still fine, using the `root as *mut i32` provenance which got exposed.)
         *exposed_ptr = 0;
         // Stack: Unknown(<N)
-        let _val = *root2; //~ ERROR: borrow stack
+        let _val = *root2; //~ ERROR: /read access .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/interior_mut1.rs

@@ -12,6 +12,6 @@ fn main() {
         *c.get() = UnsafeCell::new(1); // invalidates inner_shr
         // stack: [c: SharedReadWrite]
 
-        let _val = *inner_shr.get(); //~ ERROR: borrow stack
+        let _val = *inner_shr.get(); //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/interior_mut2.rs

@@ -25,6 +25,6 @@ fn main() {
         // stack: [c: SharedReadWrite]
 
         // now this does not work any more
-        let _val = *inner_shr.get(); //~ ERROR: borrow stack
+        let _val = *inner_shr.get(); //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/load_invalid_mut.rs

@@ -8,5 +8,5 @@ fn main() {
     let xref = unsafe { &mut *xraw };
     let xref_in_mem = Box::new(xref);
     let _val = unsafe { *xraw }; // invalidate xref
-    let _val = *xref_in_mem; //~ ERROR: borrow stack
+    let _val = *xref_in_mem; //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/load_invalid_shr.rs

@@ -8,5 +8,5 @@ fn main() {
     let xref = unsafe { &*xraw };
     let xref_in_mem = Box::new(xref);
     unsafe { *xraw = 42 }; // unfreeze
-    let _val = *xref_in_mem; //~ ERROR: borrow stack
+    let _val = *xref_in_mem; //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/mut_exclusive_violation1.rs

@@ -24,7 +24,7 @@ fn unknown_code_1(x: &i32) {
 
 fn unknown_code_2() {
     unsafe {
-        *LEAK = 7; //~ ERROR: borrow stack
+        *LEAK = 7; //~ ERROR: /write access .* tag does not exist in the borrow stack/
     }
 }
 

tests/fail/stacked_borrows/mut_exclusive_violation2.rs

@@ -7,6 +7,6 @@ fn main() {
         let mut ptr2 = ptr1.clone();
         let raw1 = ptr1.as_mut();
         let _raw2 = ptr2.as_mut();
-        let _val = *raw1; //~ ERROR: borrow stack
+        let _val = *raw1; //~ ERROR: /read access .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/outdated_local.rs

@@ -3,7 +3,7 @@ fn main() {
     let y: *const i32 = &x;
     x = 1; // this invalidates y by reactivating the lowermost uniq borrow for this local
 
-    assert_eq!(unsafe { *y }, 1); //~ ERROR: borrow stack
+    assert_eq!(unsafe { *y }, 1); //~ ERROR: /read access .* tag does not exist in the borrow stack/
 
     assert_eq!(x, 1);
 }

tests/fail/stacked_borrows/pass_invalid_mut.rs

@@ -6,5 +6,5 @@ fn main() {
     let xraw = x as *mut _;
     let xref = unsafe { &mut *xraw };
     let _val = unsafe { *xraw }; // invalidate xref
-    foo(xref); //~ ERROR: borrow stack
+    foo(xref); //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/pass_invalid_shr.rs

@@ -6,5 +6,5 @@ fn main() {
     let xraw = x as *mut _;
     let xref = unsafe { &*xraw };
     unsafe { *xraw = 42 }; // unfreeze
-    foo(xref); //~ ERROR: borrow stack
+    foo(xref); //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/pointer_smuggling.rs

@@ -8,7 +8,7 @@ fn fun1(x: &mut u8) {
 
 fn fun2() {
     // Now we use a pointer we are not allowed to use
-    let _x = unsafe { *PTR }; //~ ERROR: borrow stack
+    let _x = unsafe { *PTR }; //~ ERROR: /read access .* tag does not exist in the borrow stack/
 }
 
 fn main() {

tests/fail/stacked_borrows/raw_tracking.rs

@@ -6,6 +6,6 @@ fn main() {
     let raw2 = &mut l as *mut _; // invalidates raw1
     // Without raw pointer tracking, Stacked Borrows cannot distinguish raw1 and raw2, and thus
     // fails to realize that raw1 should not be used any more.
-    unsafe { *raw1 = 13 }; //~ ERROR: does not exist in the borrow stack
+    unsafe { *raw1 = 13 }; //~ ERROR: /write access .* tag does not exist in the borrow stack/
     unsafe { *raw2 = 13 };
 }

tests/fail/stacked_borrows/return_invalid_mut.rs

@@ -3,7 +3,7 @@ fn foo(x: &mut (i32, i32)) -> &mut i32 {
     let xraw = x as *mut (i32, i32);
     let ret = unsafe { &mut (*xraw).1 };
     let _val = unsafe { *xraw }; // invalidate xref
-    ret //~ ERROR: borrow stack
+    ret //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
 }
 
 fn main() {

tests/fail/stacked_borrows/return_invalid_mut_option.rs

@@ -10,7 +10,7 @@ fn foo(x: &mut (i32, i32)) -> Option<&mut i32> {
 
 fn main() {
     match foo(&mut (1, 2)) {
-        Some(_x) => {} //~ ERROR: borrow stack
+        Some(_x) => {} //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
         None => {}
     }
 }

tests/fail/stacked_borrows/return_invalid_mut_tuple.rs

@@ -8,5 +8,5 @@ fn foo(x: &mut (i32, i32)) -> (&mut i32,) {
 }
 
 fn main() {
-    foo(&mut (1, 2)).0; //~ ERROR: borrow stack
+    foo(&mut (1, 2)).0; //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/return_invalid_shr.rs

@@ -3,7 +3,7 @@ fn foo(x: &mut (i32, i32)) -> &i32 {
     let xraw = x as *mut (i32, i32);
     let ret = unsafe { &(*xraw).1 };
     unsafe { *xraw = (42, 23) }; // unfreeze
-    ret //~ ERROR: borrow stack
+    ret //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
 }
 
 fn main() {

tests/fail/stacked_borrows/return_invalid_shr_option.rs

@@ -9,7 +9,7 @@ fn foo(x: &mut (i32, i32)) -> Option<&i32> {
 
 fn main() {
     match foo(&mut (1, 2)) {
-        Some(_x) => {} //~ ERROR: borrow stack
+        Some(_x) => {} //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
         None => {}
     }
 }

tests/fail/stacked_borrows/return_invalid_shr_tuple.rs

@@ -8,5 +8,5 @@ fn foo(x: &mut (i32, i32)) -> (&i32,) {
 }
 
 fn main() {
-    foo(&mut (1, 2)).0; //~ ERROR: borrow stack
+    foo(&mut (1, 2)).0; //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
 }

tests/fail/stacked_borrows/shared_rw_borrows_are_weak1.rs

@@ -11,6 +11,6 @@ fn main() {
         let y: &mut Cell<i32> = mem::transmute(&mut *x); // launder lifetime
         let shr_rw = &*x; // thanks to interior mutability this will be a SharedReadWrite
         shr_rw.set(1);
-        y.get_mut(); //~ ERROR: borrow stack
+        y.get_mut(); //~ ERROR: /reborrow .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/shared_rw_borrows_are_weak2.rs

@@ -12,6 +12,6 @@ fn main() {
         let y: &i32 = mem::transmute(&*x.borrow()); // launder lifetime
         let shr_rw = &*x; // thanks to interior mutability this will be a SharedReadWrite
         shr_rw.replace(1);
-        let _val = *y; //~ ERROR: borrow stack
+        let _val = *y; //~ ERROR: /read access .* tag does not exist in the borrow stack/
     }
 }

tests/fail/stacked_borrows/shr_frozen_violation1.rs

@@ -10,6 +10,6 @@ fn main() {
 
 fn unknown_code(x: &i32) {
     unsafe {
-        *(x as *const i32 as *mut i32) = 7; //~ ERROR: only grants SharedReadOnly permission
+        *(x as *const i32 as *mut i32) = 7; //~ ERROR: /write access .* only grants SharedReadOnly permission/
     }
 }

tests/fail/stacked_borrows/transmute-is-no-escape.rs

@@ -10,5 +10,5 @@ fn main() {
     let _raw: *mut i32 = unsafe { mem::transmute(&mut x[0]) };
     // `raw` still carries a tag, so we get another pointer to the same location that does not carry a tag
     let raw = (&mut x[1] as *mut i32).wrapping_offset(-1);
-    unsafe { *raw = 13 }; //~ ERROR: borrow stack
+    unsafe { *raw = 13 }; //~ ERROR: /write access .* tag does not exist in the borrow stack/
 }