This change (closely related to the neo-project/neo#1321 proposal) speeds up
1.4M mainnet blocks import by 30%. Basically, we're eliminating key decoding
for block's multisignature that has the same keys most of the time.
Things I don't like about this patch:
* yet another parameter for verifyHashAgainstScript()
* vm keys are not copied in/out
But it's rather simple and solves the problem for this particular case, so I
think it's worth it.
This allows easier reuse of opcodes and in some cases allows to eliminate
dependencies on the whole vm package, like in compiler that only needs opcodes
and doesn't care about VM for any other purpose.
And yes, they're opcodes because an instruction is a whole thing with
operands, that's what context.Next() returns.
VM should be responsible for code execution and in case anyone interested in additional logging or errors they could handle them like we do it iin cli.
When performing NEWARRAY on a Struct or NEWSTRUCT on a Array,
underlying slice needs to be copied, because when it's capacity
doesn't matches it's length, underlying storage will be used
for appends even if it is already pointed at by another slice.
It gives access to the internal value's Value() which is essential for interop
functions that need to get something from InteropItems. And it also simplifies
some already existing code along the way.
Same thing done in a2a8981979 for PUSHBYTES,
failing to read the amount of bytes specified should lead to FAULT. Also
makes readUint16() and readUint32() panic as this is the behavior we want in
these cases. Add some tests along the way.
Current NEO documentation lists them:
https://docs.neo.org/docs/en-us/tooldev/advanced/neo_vm.html
CALL_* instructions were left out because of conflict with golint (but they're
removed in NEO 3.0 anyway, so wasting time on them makes no sense).
Update autogenerated instruction_string.go accordingly.
The code that we have actually implements XTUCK and not TUCK. And it's a bit
broken, so fix it and add some tests. The most interesting one (that required
to touch stack code) is the one when we have 1 element on the stack and are
trying to tell XTUCK to push 2 elements deep.
Fixes things like:
* exported type/method/function X should have comment or be unexported
* comment on exported type/method/function X should be of the form "X ..."
(with optional leading article)
Refs. #213.
Simplifies a lot of code and removes some duplication. Unfortunately I had to
move test_util random functions in same commit to avoid cycle
dependencies. One of these random functions was also used in core/transaction
testing, to simplify things I've just dropped it there and used a static
string (which is nice to have for a test anyway).
There is still sha256 left in wallet (but it needs to pass Hash structure into
the signing function).
* support VM to pass method and arguments to a script.
* added support for type assertions in smartcontracts.
* added native vm support for print.
* moved VM API packages to vm -> API
* reverted the native Print opcode in favor of runtime.Log
* added support for registering custom interop hooks in the VM.
* Updated README
* Updated compiler with @OPTIMIZE tags
* Moved more tests to VM package.
* optimized and refactored compiler and vm API
* updated README with new smartcontract apis
* bumped version
* renamed test folders and fixed bug where wrong jump labels would be exectuted for rewrite.
* Added support for Osize (len(string)) and factored out the array tests
* Added current instruction number to VM prompt if program is loaded.
* added support for unary expressions.
* updated README of and sorted the help commands
* updated readme of the compiler
* bumped version -> 0.39.0
* changed vm commands to match more of the standard
* fixed Uint16 jmp bug in VM
* moved test to vm + fixed numnotequal bug
* fixed broken tests
* moved compiler tests to vm tests
* added basic for support + inc and dec stmts
* bumped version
* Virtual machine for the NEO blockhain.
* fixed big.Int numeric operation pointer issue.
* added appcall
* Added README for vm package.
* removed main.go
* started VM cli (prompt) integration
* added support for printing the stack.
* moved cli to vm package
* fixed vet errors
* updated readme
* added more test for VM and fixed some edge cases.
* bumped version -> 0.37.0
