From: Cherry Mui <cherryyz@google.com>
Date: Fri, 18 Feb 2022 00:43:49 +0000 (-0500)
Subject: runtime: define racefuncenter and racefuncexit as ABIInternal
X-Git-Tag: go1.18~33^2~40
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=d93cc8cb9639212ee674ecbc9149fb897dd8fd77;p=gostls13.git

runtime: define racefuncenter and racefuncexit as ABIInternal

They are called from compiler instrumented code as ABIInternal.
Define them as ABIInternal to avoid the wrappers and save some
stack space, to avoid nosplit overflow in -race -N -l build.

For #51247.

Change-Id: Iadad7d6da8ac03780a7b02b03b004c52d34e020a
Reviewed-on: https://go-review.googlesource.com/c/go/+/386715
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
---

diff --git a/src/runtime/race_arm64.s b/src/runtime/race_arm64.s
index 798e23294a..59fade02ee 100644
--- a/src/runtime/race_arm64.s
+++ b/src/runtime/race_arm64.s
@@ -188,8 +188,12 @@ ret:
 
 // func runtime·racefuncenter(pc uintptr)
 // Called from instrumented code.
-TEXT	runtime·racefuncenter(SB), NOSPLIT, $0-8
+TEXT	runtime·racefuncenter<ABIInternal>(SB), NOSPLIT, $0-8
+#ifdef GOEXPERIMENT_regabiargs
+	MOVD	R0, R9	// callpc
+#else
 	MOVD	callpc+0(FP), R9
+#endif
 	JMP	racefuncenter<>(SB)
 
 // Common code for racefuncenter
@@ -205,7 +209,7 @@ TEXT	racefuncenter<>(SB), NOSPLIT, $0-0
 
 // func runtime·racefuncexit()
 // Called from instrumented code.
-TEXT	runtime·racefuncexit(SB), NOSPLIT, $0-0
+TEXT	runtime·racefuncexit<ABIInternal>(SB), NOSPLIT, $0-0
 	load_g
 	MOVD	g_racectx(g), R0	// race context
 	// void __tsan_func_exit(ThreadState *thr);