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stackdepth.go
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stackdepth.go
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/*
* Cadence - The resource-oriented smart contract programming language
*
* Copyright Dapper Labs, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package runtime
const defaultStackDepthLimit = 2000
type stackDepthLimiter struct {
depth uint64
limit uint64
}
func newStackDepthLimiter(stackDepthLimit uint64) *stackDepthLimiter {
if stackDepthLimit == 0 {
stackDepthLimit = defaultStackDepthLimit
}
return &stackDepthLimiter{
limit: stackDepthLimit,
}
}
func (limiter *stackDepthLimiter) OnFunctionInvocation() {
limiter.depth++
if limiter.depth <= limiter.limit {
return
}
panic(CallStackLimitExceededError{
Limit: limiter.limit,
})
}
func (limiter *stackDepthLimiter) OnInvokedFunctionReturn() {
limiter.depth--
}