cmd/go: allow -buildmode=pie with -race on darwin

Fixes #62318

Change-Id: I6f1b22c9a4523461aa4c7fcd12e72dbc4430812d
Reviewed-on: https://go-review.googlesource.com/c/go/+/523475
Run-TryBot: Andy Pan <panjf2000@gmail.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

src/cmd/go/internal/work/init.go

@@ -246,8 +246,8 @@ func buildModeInit() {
 			pkgsFilter = oneMainPkg
 		}
 	case "pie":
-		if cfg.BuildRace {
-			base.Fatalf("-buildmode=pie not supported when -race is enabled")
+		if cfg.BuildRace && !platform.DefaultPIE(cfg.Goos, cfg.Goarch, cfg.BuildRace) {
+			base.Fatalf("-buildmode=pie not supported when -race is enabled on %s/%s", cfg.Goos, cfg.Goarch)
 		}
 		if gccgo {
 			codegenArg = "-fPIE"

src/cmd/go/testdata/script/build_pie_race.txt

@@ -0,0 +1,30 @@
+# go build -buildmode=pie -race main.go on Darwin should work without errors
+
+[!race] skip 'test requires race detector support'
+
+[!GOOS:darwin] ! go build -buildmode=pie -race
+[!GOOS:darwin] stderr '^-buildmode=pie not supported when -race is enabled on '$GOOS'/'$GOARCH'$'
+[!GOOS:darwin] stop 'not testing -buildmode=pie -race on platform that does not support it'
+
+go build -buildmode=pie -race bytes
+! stderr .
+
+[short] stop 'not linking a binary in -short mode'
+
+go build -buildmode=pie -race main.go
+! stderr .
+exec ./main
+stdout 'Hello, 世界'
+
+-- go.mod --
+module m
+
+go 1.21
+-- main.go --
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello, 世界")
+}