DanielMorsing

diff --git a/src/net/http/server.go b/src/net/http/server.go
index 57e1b5dacb..31c8352ca2 100644
--- a/src/net/http/server.go
+++ b/src/net/http/server.go
@@ -22,6 +22,7 @@ import (
 	"os"
 	"path"
 	"runtime"
+	"runtime/causalprof"
 	"strconv"

DanielMorsing

diff --git a/src/cmd/trace/trace.go b/src/cmd/trace/trace.go
index f39a397d0d..de8348e996 100644
--- a/src/cmd/trace/trace.go
+++ b/src/cmd/trace/trace.go
@@ -739,6 +739,8 @@ func generateTrace(params *traceParams, consumer traceConsumer) error {
 			ctx.emitInstant(ev, "task start", "user event")
 		case trace.EvUserTaskEnd:
 			ctx.emitInstant(ev, "task end", "user event")
+		case trace.EvGoCopyStack:
+			ctx.emitInstant(ev, "copystack", "")

DanielMorsing

goos: linux
goarch: amd64
pkg: crypto/tls
cpu: AMD Ryzen 7 5800X 8-Core Processor             
                                                  │ /tmp/before │           /tmp/overhead            │             /tmp/enabled             │
                                                  │   sec/op    │   sec/op     vs base               │    sec/op     vs base                │
HandshakeServer/RSA-16                              251.0µ ± 0%   253.2µ ± 1%  +0.84% (p=0.000 n=10)    253.0µ ± 0%   +0.76% (p=0.000 n=10)
HandshakeServer/ECDHE-P256-RSA/TLSv13-16            322.4µ ± 1%   317.1µ ± 1%  -1.65% (p=0.001 n=10)    350.2µ ± 1%   +8.63% (p=0.000 n=10)
HandshakeServer/ECDHE-P256-RSA/TLSv12-16            322.0µ ± 6%   305.5µ ± 0%  -5.11% (p=0.000 n=10)    318.5µ ± 9%        ~ (p=0.280 n=10)
HandshakeServer/ECDHE-P256-ECDSA-P256/TLSv13-16     97.76µ ± 3%   97.50µ ± 8%       ~ (p=0.912 n=10)   126.67µ ± 3%  +29.58% (p=0.000 n=10)