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Author SHA1 Message Date
Evgeniy Stratonikov
9712be78fd vm: optimize refcounter 
```
name                    old time/op    new time/op    delta
RefCounter_Add-8          9.47ns ± 4%    2.75ns ± 1%   -70.92%  (p=0.000 n=10+9)
RefCounter_AddRemove-8    88.9ns ±20%     5.5ns ± 4%   -93.78%  (p=0.000 n=10+10)

name                    old alloc/op   new alloc/op   delta
RefCounter_Add-8           0.00B          0.00B           ~     (all equal)
RefCounter_AddRemove-8     48.0B ± 0%      0.0B       -100.00%  (p=0.000 n=10+10)

name                    old allocs/op  new allocs/op  delta
RefCounter_Add-8            0.00           0.00           ~     (all equal)
RefCounter_AddRemove-8      2.00 ± 0%      0.00       -100.00%  (p=0.000 n=10+10)
```

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2022-08-23 13:18:06 +03:00
Evgeniy Stratonikov
59fbc689e4 vm/bench: extend refcounter benchmarks 
Adding an array multiple times leads to the fast update via `IncRC`.
This hides the allocation that is there on the first addition. In this
commit add another benchmark which measures Add/Remove together, to
ensure that `switch` in `refCounter.Add` is entered. Benchmark results
are meaningful, because `Add`/`Remove` have almost identical implementation.

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2022-08-23 13:08:42 +03:00
Anna Shaleva
916f2293b8 *: apply go 1.19 formatter heuristics 
And make manual corrections where needed. See the "Common mistakes
and pitfalls" section of https://tip.golang.org/doc/comment.
 2022-08-09 15:37:52 +03:00
Anna Shaleva
bb751535d3 *: bump minimum supported go version 
Close #2497.
 2022-08-08 13:59:32 +03:00
Roman Khimov
e8d2277fe5 contract/vm: only push NULL after call in dynamic contexts 
And determine the need for Null dynamically. For some reason the only dynamic
context is Contract.Call. CALLT is not dynamic and neither is a call from
native contract, go figure...
 2022-08-05 14:35:00 +03:00
Roman Khimov
99e2681d3a interop/vm: use more robust CalledByEntry check 
Directly check contexts.
 2022-08-05 14:35:00 +03:00
Roman Khimov
13f5fdbe8a vm: extract shared parts of the Context 
Local calls reuse them, cross-contract calls create new ones. This allows to
avoid some allocations and use a little less memory.
 2022-08-05 14:26:25 +03:00
Roman Khimov
1e62474514 vm: move InvocationTree into a package of its own 
result.Invoke shouldn't depend on vm.
 2022-07-08 23:30:30 +03:00
Roman Khimov
fab8dfb9f8 vm: move State type into a package of its own 
It's used a lot in other places that need it, but don't need whole VM at the
same time.
 2022-07-08 18:34:52 +03:00
Roman Khimov
926b082d39
Merge pull request #2538 from nspcc-dev/restrict-out-of-bounds 
core: check methods offsets while contract deploying
 2022-07-04 12:54:32 +03:00
Roman Khimov
19ad31dc52 vm: optimize IsSignatureContract 
We use it a lot in (*Blockchain).IsTxStillRelevant().

name                   old time/op    new time/op    delta
IsSignatureContract-8    19.1ns ± 5%     1.2ns ± 4%  -93.81%  (p=0.000 n=10+10)

name                   old alloc/op   new alloc/op   delta
IsSignatureContract-8     0.00B          0.00B          ~     (all equal)

name                   old allocs/op  new allocs/op  delta
IsSignatureContract-8      0.00           0.00          ~     (all equal)
 2022-06-07 10:29:13 +03:00
Roman Khimov
92c94f265c interop/vm: make VM reusable and use on VM for all in-block execs 
Avoid allocating again and again. Increases TPS by about 3%.
 2022-06-07 10:05:47 +03:00
Anna Shaleva
1005c1f7db vm: forbid jumping out of the script bounds 2022-06-06 12:18:19 +03:00
Roman Khimov
edb6ca8926
Merge pull request #2531 from nspcc-dev/perf 
Minor performance improvements
 2022-06-03 10:40:56 +03:00
Roman Khimov
c3d989ebda stackitem: reusable serialization context 
We serialize items a lot and this allows to avoid a number of allocations.
 2022-06-02 15:38:39 +03:00
Roman Khimov
3d4076ca36 vm: microoptimize new estack creation 
Subslice won't reach element -1, but it can reuse the same buffer space more
effectively.
 2022-05-31 18:53:05 +03:00
Roman Khimov
e1607e23c2
Merge pull request #2525 from nspcc-dev/immutable-items 
vm: implement immutable stackitems
 2022-05-31 10:36:56 +03:00
Anna Shaleva
42a051e55a core: DeepCopy notifiction event args inside System.Runtime.Notify 2022-05-31 08:07:53 +03:00
Anna Shaleva
7296f0c913 vm: support immutable compound types 2022-05-31 08:07:50 +03:00
Anna Shaleva
107f5e0793 vm: adjust refcount operations order 
Perform add/set/remove operations with VM type firstly, and with
refcounter after that. It is needed to be able to extend add/set/remove
operations with extra checks.
 2022-05-31 08:02:13 +03:00
Roman Khimov
502cdd68ab
Merge pull request #2508 from nspcc-dev/snapshot-isolation 
core, vm: implement snapshot isolation
 2022-05-27 12:44:06 +03:00
Anna Shaleva
a79c80cb8d vm: wrap cross-contract exceptions 2022-05-26 11:44:26 +03:00
Anna Shaleva
a39b7cc3fd core, vm: move all isolation-related logic out of VM 
Keep it inside the interop context.
 2022-05-26 09:26:31 +03:00
Anna Shaleva
f79f62dab4 vm: use single function instead of committer/discarder 2022-05-26 09:26:31 +03:00
Anna Shaleva
08b68e9b82 vm, core: push Null return value only if no exception occurs 
Close https://github.com/nspcc-dev/neo-go/issues/2509.
 2022-05-26 09:26:31 +03:00
Anna Shaleva
ce226f6b76 vm: optimize context wrapping code 
We can omit DAO wrapping for safe methods and for those methods that are not
wrapped into try-catch block. However, we still need to persist
notificationsCount changes for these methods to the parent context.
 2022-05-26 09:26:31 +03:00
Anna Shaleva
0cd19f550e core, vm: implement snapshot isolation 
Initial implementation without optimisations, but it should work.
 2022-05-26 09:26:25 +03:00
Anna Shaleva
a3285eae04 vm: stringify InteropInterface stackitem type as InteropInterface 2022-05-25 13:20:21 +03:00
Roman Khimov
ae2395f55f vm: simplify (slot).Set code 
Refcounter handles nil items just fine.
 2022-05-17 16:26:22 +03:00
Roman Khimov
f2f66ad36e vm: clear static slot refs on exit, fix #2501 2022-05-17 16:26:22 +03:00
Roman Khimov
0d93b353e6 vm: count initial Null slot variables as well 
Match C# behavior. Thanks to @ixje for finding this.
 2022-05-16 17:42:57 +03:00
Roman Khimov
18d627e7f7 vm: count map key in the refcounter as well 
Thanks @ixje for spotting this.
 2022-05-16 16:07:25 +03:00
Anna Shaleva
e66e82278c vm: upgrade submodule 2022-05-12 14:25:14 +03:00
Anna Shaleva
a94ccf9236 vm: add MODMUL and MODPOW opcodes 
Close #2470.
 2022-05-12 14:25:14 +03:00
Roman Khimov
c6f8c33e66
Merge pull request #2478 from nspcc-dev/mainnet-fixes 
Mainnet fixes
 2022-05-12 10:04:53 +03:00
Roman Khimov
621db8c832 stackitem: allow to unJSONize big numbers (>int64), fix #2477 
100000000000000000000 overflows int64 and NeoGo returns some garbage to
contracts instead of a proper number.
 2022-05-11 21:03:10 +03:00
Anna Shaleva
3be37e8c5b vm: check instruction offset is valid before subsequent IP move 
Reference implementation:
e167f03e25/src/neo-vm/ExecutionContext.cs (L77).

Turns out that exception-related code (try\finally handling) is the only
place where next instruction pointer bounds are not pre-checked before
assignment. This statement is true for both go and C# implementations.
However, C# code has duplicate check located inside the
InstructionPointer setter for all instructions except the
exception-related ones. Neo-go code doesn't perform this duplicate check.
Thus, C# VM FAULTs execution in case of invalid TRY/FINALLY offsets, and
neo-go VM does not.

This commit reverts a part of
https://github.com/nspcc-dev/neo-go/pull/2396. This bug is discovered
thanks to test added in https://github.com/neo-project/neo-vm/pull/453.
 2022-05-11 14:04:02 +03:00
Anna Shaleva
8af043520d vm: adjust MaxByteArrayComparableSize value 
https://github.com/neo-project/neo-vm/pull/454#discussion_r857533800.
 2022-05-07 12:56:09 +03:00
Anna Shaleva
23b78b0be2 vm: limit ByteArray comparable length 
Close #2460.
 2022-05-07 12:56:04 +03:00
Elizaveta Chichindaeva
28908aa3cf [#2442] English Check 
Signed-off-by: Elizaveta Chichindaeva <elizaveta@nspcc.ru>
 2022-05-04 19:48:27 +03:00
Roman Khimov
bf3415e2bc emit: introduce CheckSig function 
Which allows to create verification scripts without keys.PublicKey which is
convenient in some cases where we already have serialized key and don't want
to waste time decompressing it.
 2022-04-27 22:57:10 +03:00
Anna Shaleva
2972569a0a vm: make byte representation of VMState compatible with C# 2022-04-04 13:52:29 +03:00
Roman Khimov
ad1dd3ebb7
Merge pull request #2399 from nspcc-dev/fuzz-tests 
vm: add some Fuzz tests
 2022-03-21 12:00:55 +03:00
Evgeniy Stratonikov
3f65473f64 vm: add some Fuzz tests 
Both `IsScriptCorrect` and `VM.Run` should never panic.

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2022-03-18 16:13:39 +03:00
Roman Khimov
906d99571b
Merge pull request #2369 from nspcc-dev/goshechka 
*: go 1.18 support 🎉😍🎊🍰🥂
 2022-03-18 15:07:20 +03:00
Roman Khimov
c2845852ae
Merge pull request #2397 from nspcc-dev/is-script-correct-panic 
vm: avoid panic in `IsScriptCorrect`
 2022-03-18 10:08:39 +03:00
Evgeniy Stratonikov
ef28308dbf vm: avoid panic in IsScriptCorrect 
Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2022-03-17 20:12:50 +03:00
Anna Shaleva
2096ad6e81 *: remove io/ioutil uses 
Close #1764.
 2022-03-17 19:39:18 +03:00
Evgeniy Stratonikov
492c91b4c5 vm: disallow negative offset in (*Context).Next() 
Currently the only known reason this can happen is processing
ENDFINALLY opcode before the corresponding ENDTRY.

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
 2022-03-17 18:52:48 +03:00
Roman Khimov
5379ef75bb
Merge pull request #2391 from nspcc-dev/fix-reverse 
vm: fix integer conversions
 2022-03-10 12:27:10 +03:00