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vm: redefine SHL/SHR limits based on integer size

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This commit is contained in:
Evgenii Stratonikov 2019-11-07 12:50:11 +03:00
parent 439cd72294
commit 816d78b5ee
2 changed files with 4 additions and 4 deletions
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4
pkg/vm/vm.go
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@ -51,8 +51,8 @@ const (
// on all stacks at once.
MaxStackSize = 2 * 1024
maxSHLArg = 256
minSHLArg = -256
maxSHLArg = MaxBigIntegerSizeBits
minSHLArg = -MaxBigIntegerSizeBits
)
// VM represents the virtual machine.

4
pkg/vm/vm_test.go
View file

@ -624,7 +624,7 @@ func TestSHRSmallValue(t *testing.T) {
prog := makeProgram(SHR)
vm := load(prog)
vm.estack.PushVal(5)
vm.estack.PushVal(-257)
vm.estack.PushVal(minSHLArg - 1)
checkVMFailed(t, vm)
}
@ -660,7 +660,7 @@ func TestSHLBigValue(t *testing.T) {
prog := makeProgram(SHL)
vm := load(prog)
vm.estack.PushVal(5)
vm.estack.PushVal(257)
vm.estack.PushVal(maxSHLArg + 1)
checkVMFailed(t, vm)
}