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vm: store exception stack in the context

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Avoid allocating it.
This commit is contained in:
Roman Khimov 2021-08-20 23:11:59 +03:00
parent d3198c3082
commit ed35cf8f12
3 changed files with 5 additions and 4 deletions
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4
pkg/vm/context.go
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@ -35,8 +35,8 @@ type Context struct {
local *Slot local *Slot
arguments *Slot arguments *Slot
// Exception context stack pointer. // Exception context stack.
tryStack *Stack tryStack Stack
// Script hash of the prog. // Script hash of the prog.
scriptHash util.Uint160 scriptHash util.Uint160

1
pkg/vm/stack.go
View file

@ -171,6 +171,7 @@ func initStack(s *Stack, n string, refc *refCounter) {
s.refs = refc s.refs = refc
s.top.next = &s.top s.top.next = &s.top
s.top.prev = &s.top s.top.prev = &s.top
s.len = 0
} }
// Clear clears all elements on the stack and set its length to 0. // Clear clears all elements on the stack and set its length to 0.

4
pkg/vm/vm.go
View file

@ -282,7 +282,7 @@ func (v *VM) LoadScriptWithFlags(b []byte, f callflag.CallFlag) {
ctx := NewContextWithParams(b, 0, -1, 0) ctx := NewContextWithParams(b, 0, -1, 0)
v.estack = newStack("evaluation", &v.refs) v.estack = newStack("evaluation", &v.refs)
ctx.estack = v.estack ctx.estack = v.estack
ctx.tryStack = newStack("exception", nil) initStack(&ctx.tryStack, "exception", nil)
ctx.callFlag = f ctx.callFlag = f
ctx.static = newSlot(&v.refs) ctx.static = newSlot(&v.refs)
ctx.callingScriptHash = v.GetCurrentScriptHash() ctx.callingScriptHash = v.GetCurrentScriptHash()
@ -1519,7 +1519,7 @@ func (v *VM) call(ctx *Context, offset int) {
newCtx.RetCount = -1 newCtx.RetCount = -1
newCtx.local = nil newCtx.local = nil
newCtx.arguments = nil newCtx.arguments = nil
newCtx.tryStack = newStack("exception", nil) initStack(&newCtx.tryStack, "exception", nil)
newCtx.NEF = ctx.NEF newCtx.NEF = ctx.NEF
v.istack.PushVal(newCtx) v.istack.PushVal(newCtx)
v.Jump(newCtx, offset) v.Jump(newCtx, offset)