Tracing for wasm with bridging to native (#6916)

* implement events handling, implement parent_id for spans & events

* add events to sp_io::storage

* update test

* add tests

* adjust limit

* let tracing crate handle parent_ids

* re-enable current-id tracking

* add test for threads with CurrentSpan

* fix log level

* remove redundant check for non wasm traces

* remove duplicate definition in test

* Adding conditional events API

* prefer explicit parent_id over current,

enhance test

* limit changes to client::tracing event implementation

* remove From impl due to fallback required on parent_id

* make tracing codecable

* replace with global tracing

* new tracing interface

* impl TracingSubscriber in client

* implement access to global TracingSubscriber from primitives

* span for wasm

* increment towards Wasm Tracing Subscriber implementation

* increment, remove sp-tracing from runtime-interface

* increment, it compiles

* attained original functionality with new mechanism

* implement remaining TracingSubscriber functions

* remove spans from decl_module

* add handling for encoded values

* Revert "replace with global tracing"

This reverts commit 8824a60deea54d9b437407a21c8ceaf6a1902ee5.

* Wasm Side Tracing

* tracing on wasm

* enable tracing wasm on node-runtime

* export all the macros in std

* tracing subscriber on wasm-side only

* pass spans and events over and record them

* reactivate previous code and  cleanup

* further cleaning up

* extend the span macros, activate through executive

* tracking the actual extrinsic, too

* style

* fixing tests

* spaces -> tabs

* attempting to reactivate params

* activate our tests in CI

* some passing

* tests passing

* with core lazy

* global tracer for wasm side with pass over

* fixing metadata referencing

* remove const_fn feature requirement

* reenable dispatch traces

* reset client tracing

* further cleaning up

* fixing runtime-test

* move tracing-build setup into runtime-test

* Merge DebugWriter from tracing and frame-support, move to sp-std

* remove dangling fixme

* Docs for tracing primitives

* cleaning up a bit more

* Wasm interface docs

* optimise docs.rs setup

* adding tracing flags to uncomment

* remove brace

* fixing imports

* fixing broken syntax

* add required modules

* nicer formatting

* better target management

* adding low level storage tracing events into frame

* add custom Debug impl for WasmMetadata

* cloning profiler

* adding info about cloning profiler

* using in-scope for within calls

* proper time tracing, cleaning up println

* allow to disable tracing on runtime_interface-macro

* disable tracing for wasm-tracing-interface

* simplify wasm-tracing-api

* update client to new interface

* fixing docs and tests for sp-tracing

* update integration tests

* re-activating enter_span

* dropping FIXME, it's documented

* fix formatting

* fix formatting

* fix imports

* more debug info

* inform wasm about it being disabled by returning 1

* only one tracer, but enabled multi-all support

* make trait pub again for tests

* Apply suggestions from code review

Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

* fixing wasm doc tests for proper usage

* remove unnecessary import

* fixing formatting

* minor style fixes

* downgrading wabt

* update error message for UI

* Fix interface test

* next attempt to fix macros

* geee

* revert tracing on hashed for future PR

* remove local macros, use originals

* we are able to convert to static items

* implement more WasmValue types

* adding support to convert str, debug and encoded values

* more minor fixes

* revert unsafe 'static making

* fix indentation

* remove commented lines

* bump all them tracing versions

* cleaning up docs and info

* document new flag

* the new layered system handles span cloning better

* Apply suggestions from code review

Co-authored-by: David <dvdplm@gmail.com>

Co-authored-by: Matt Rutherford <mattrutherford@users.noreply.github.com>
Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>
Co-authored-by: David <dvdplm@gmail.com>

substrate/primitives/std/src/lib.rs

@@ -20,7 +20,6 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
-
 #![cfg_attr(feature = "std",
    doc = "Substrate runtime standard library as compiled when linked with Rust's standard library.")]
 #![cfg_attr(not(feature = "std"),
@@ -65,6 +64,30 @@ include!("../with_std.rs");
 #[cfg(not(feature = "std"))]
 include!("../without_std.rs");
 
+
+/// A target for `core::write!` macro - constructs a string in memory.
+#[derive(Default)]
+pub struct Writer(vec::Vec<u8>);
+
+impl fmt::Write for Writer {
+	fn write_str(&mut self, s: &str) -> fmt::Result {
+		self.0.extend(s.as_bytes());
+		Ok(())
+	}
+}
+
+impl Writer {
+	/// Access the content of this `Writer` e.g. for printout
+	pub fn inner(&self) -> &vec::Vec<u8> {
+		&self.0
+	}
+
+	/// Convert into the content of this `Writer`
+	pub fn into_inner(self) -> vec::Vec<u8> {
+		self.0
+	}
+}
+
 /// Prelude of common useful imports.
 ///
 /// This should include only things which are in the normal std prelude.