Miri engine refactoring

[oli-obk]

r? @RalfJung

split out the "just moves stuff around" part of #55293

[bors]

☔ The latest upstream changes (presumably #55393) made this pull request unmergeable. Please resolve the merge conflicts.

[RalfJung]

r=me after rebase

[rust-highfive]

The job x86_64-gnu-llvm-5.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

travis_time:end:1b8cd4b5:start=1541420765623417153,finish=1541420766810025814,duration=1186608661
$ git checkout -qf FETCH_HEAD
travis_fold:end:git.checkout

Encrypted environment variables have been removed for security reasons.
See https://docs.travis-ci.com/user/pull-requests/#Pull-Requests-and-Security-Restrictions
$ export SCCACHE_BUCKET=rust-lang-ci-sccache2
$ export SCCACHE_REGION=us-west-1
Setting environment variables from .travis.yml
$ export IMAGE=x86_64-gnu-llvm-5.0
---
[00:07:50]    |                     ^^^^ doesn't have a size known at compile-time
[00:07:50]    |
[00:07:50]    = help: the trait `std::marker::Sized` is not implemented for `Self`
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = help: consider adding a `where Self: std::marker::Sized` bound
[00:07:50]    = help: unsized locals are gated as an unstable feature
[00:07:50] 
[00:07:50] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[00:07:50]   --> librustc/mir/interpret/pointer.rs:21:24
[00:07:50]   --> librustc/mir/interpret/pointer.rs:21:24
[00:07:50]    |
[00:07:50] 21 |     fn truncate_to_ptr(self, val: u128) -> (u64, bool) {
[00:07:50]    |
[00:07:50]    = help: the trait `std::marker::Sized` is not implemented for `Self`
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = help: consider adding a `where Self: std::marker::Sized` bound
[00:07:50]    = help: unsized locals are gated as an unstable feature
[00:07:50] 
[00:07:50] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[00:07:50]   --> librustc/mir/interpret/pointer.rs:27:34
[00:07:50]   --> librustc/mir/interpret/pointer.rs:27:34
[00:07:50]    |
[00:07:50] 27 |     fn overflowing_signed_offset(self, val: u64, i: i128) -> (u64, bool) {
[00:07:50]    |
[00:07:50]    = help: the trait `std::marker::Sized` is not implemented for `Self`
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = help: consider adding a `where Self: std::marker::Sized` bound
[00:07:50]    = help: unsized locals are gated as an unstable feature
[00:07:50] 
[00:07:50] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[00:07:50]   --> librustc/mir/interpret/pointer.rs:39:27
[00:07:50]   --> librustc/mir/interpret/pointer.rs:39:27
[00:07:50]    |
[00:07:50] 39 |     fn overflowing_offset(self, val: u64, i: u64) -> (u64, bool) {
[00:07:50]    |
[00:07:50]    = help: the trait `std::marker::Sized` is not implemented for `Self`
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = help: consider adding a `where Self: std::marker::Sized` bound
[00:07:50]    = help: unsized locals are gated as an unstable feature
[00:07:50] 
[00:07:50] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[00:07:50]   --> librustc/mir/interpret/pointer.rs:45:28
[00:07:50]   --> librustc/mir/interpret/pointer.rs:45:28
[00:07:50]    |
[00:07:50] 45 |     fn signed_offset<'tcx>(self, val: u64, i: i64) -> EvalResult<'tcx, u64> {
[00:07:50]    |
[00:07:50]    = help: the trait `std::marker::Sized` is not implemented for `Self`
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = help: consider adding a `where Self: std::marker::Sized` bound
[00:07:50]    = help: unsized locals are gated as an unstable feature
[00:07:50] 
[00:07:50] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[00:07:50]   --> librustc/mir/interpret/pointer.rs:50:21
[00:07:50]   --> librustc/mir/interpret/pointer.rs:50:21
[00:07:50]    |
[00:07:50] 50 |     fn offset<'tcx>(self, val: u64, i: u64) -> EvalResult<'tcx, u64> {
[00:07:50]    |
[00:07:50]    = help: the trait `std::marker::Sized` is not implemented for `Self`
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = help: consider adding a `where Self: std::marker::Sized` bound
[00:07:50]    = help: unsized locals are gated as an unstable feature
[00:07:50] 
[00:07:50] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[00:07:50]   --> librustc/mir/interpret/pointer.rs:55:31
[00:07:50]   --> librustc/mir/interpret/pointer.rs:55:31
[00:07:50]    |
[00:07:50] 55 |     fn wrapping_signed_offset(self, val: u64, i: i64) -> u64 {
[00:07:50]    |
[00:07:50]    = help: the trait `std::marker::Sized` is not implemented for `Self`
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
[00:07:50]    = help: consider adding a `where Self: std::marker::Sized` bound
[00:07:50]    = help: unsized locals are gated as an unstable feature
[00:07:50] 
[00:07:58] error: aborting due to 7 previous errors
[00:07:58] 
---
[00:07:58] travis_fold:end:stage0-rustc

[00:07:58] travis_time:end:stage0-rustc:start=1541421079570814179,finish=1541421255667987263,duration=176097173084

[00:07:58] thread 'main' panicked at 'cargo must succeed', bootstrap/compile.rs:1101:9
[00:07:58] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap build
[00:07:58] Build completed unsuccessfully in 0:04:04
[00:07:58] Makefile:28: recipe for target 'all' failed
[00:07:58] Makefile:28: recipe for target 'all' failed
[00:07:58] make: *** [all] Error 1

The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:16a7108c
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
---
travis_time:end:274e2916:start=1541421256300368392,finish=1541421256303877578,duration=3509186
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:03cc7800
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:1abfcb19
travis_time:start:1abfcb19
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:2bd90828
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[oli-obk]

@bors r=RalfJung

[bors]

📌 Commit 7276b4fb10c4bd659914785e412880cac4dd4afd has been approved by RalfJung

[bors]

☔ The latest upstream changes (presumably #55549) made this pull request unmergeable. Please resolve the merge conflicts.

[oli-obk]

@bors r=RalfJung

[bors]

📌 Commit 428af73 has been approved by RalfJung

[bors]

⌛ Testing commit 428af73 with merge a88613c...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: RalfJung
Pushing a88613c to master...