cmd, core, eth/tracers: support fancier js tracing (#15516)

* cmd, core, eth/tracers: support fancier js tracing

* eth, internal/web3ext: rework trace API, concurrency, chain tracing

* eth/tracers: add three more JavaScript tracers

* eth/tracers, vendor: swap ottovm to duktape for tracing

* core, eth, internal: finalize call tracer and needed extras

* eth, tests: prestate tracer, call test suite, rewinding

* vendor: fix windows builds for tracer js engine

* vendor: temporary duktape fix

* eth/tracers: fix up 4byte and evmdis tracer

* vendor: pull in latest duktape with my upstream fixes

* eth: fix some review comments

* eth: rename rewind to reexec to make it more obvious

* core/vm: terminate tracing using defers

1 files changed, 10 insertions, 0 deletions

diff --git a/vendor/gopkg.in/olebedev/go-duktape.v3/utils.go b/vendor/gopkg.in/olebedev/go-duktape.v3/utils.go
new file mode 100644
index 000000000..86191239b
--- /dev/null
+++ b/vendor/gopkg.in/olebedev/go-duktape.v3/utils.go
@@ -0,0 +1,10 @@
+package duktape
+
+// Must returns existing *Context or throw panic.
+// It is highly recommended to use Must all the time.
+func (d *Context) Must() *Context {
+	if d.duk_context == nil {
+		panic("[duktape] Context does not exists!\nYou cannot call any contexts methods after `DestroyHeap()` was called.")
+	}
+	return d
+}