85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
package vm
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import (
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"context"
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"fmt"
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"os"
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cid "github.com/ipfs/go-cid"
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"github.com/filecoin-project/go-state-types/network"
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"github.com/filecoin-project/lotus/chain/types"
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)
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// stat counters
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var (
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StatSends uint64
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StatApplied uint64
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)
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type ExecutionLane int
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const (
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// ExecutionLaneDefault signifies a default, non prioritized execution lane.
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ExecutionLaneDefault ExecutionLane = iota
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// ExecutionLanePriority signifies a prioritized execution lane with reserved resources.
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ExecutionLanePriority
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)
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type Interface interface {
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// Applies the given message onto the VM's current state, returning the result of the execution
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ApplyMessage(ctx context.Context, cmsg types.ChainMsg) (*ApplyRet, error)
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// Same as above but for system messages (the Cron invocation and block reward payments).
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// Must NEVER fail.
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ApplyImplicitMessage(ctx context.Context, msg *types.Message) (*ApplyRet, error)
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// Flush all buffered objects into the state store provided to the VM at construction.
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Flush(ctx context.Context) (cid.Cid, error)
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}
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// Executor is the general vm execution interface, which is prioritized according to execution lanes.
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// User must call Done when it is done with this executor to release resource holds by the execution
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// environment
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type Executor interface {
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Interface
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// Done must be called when done with the executor to release resource holds.
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// It is an error to invoke Interface methods after Done has been called.
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Done()
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}
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// WARNING: You will not affect your node's execution by misusing this feature, but you will confuse yourself thoroughly!
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// An envvar that allows the user to specify debug actors bundles to be used by the FVM
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// alongside regular execution. This is basically only to be used to print out specific logging information.
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// Message failures, unexpected terminations,gas costs, etc. should all be ignored.
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var useFvmDebug = os.Getenv("LOTUS_FVM_DEVELOPER_DEBUG") == "1"
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func newVM(ctx context.Context, opts *VMOpts) (Interface, error) {
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if opts.NetworkVersion >= network.Version16 {
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if useFvmDebug {
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return NewDualExecutionFVM(ctx, opts)
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}
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return NewFVM(ctx, opts)
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}
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return NewLegacyVM(ctx, opts)
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}
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func NewVM(ctx context.Context, opts *VMOpts) (Executor, error) {
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switch opts.ExecutionLane {
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case ExecutionLaneDefault, ExecutionLanePriority:
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default:
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return nil, fmt.Errorf("invalid execution lane: %d", opts.ExecutionLane)
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}
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token := execution.getToken(opts.ExecutionLane)
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vmi, err := newVM(ctx, opts)
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if err != nil {
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token.Done()
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return nil, err
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}
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return newVMExecutor(vmi, token), nil
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}
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