runtime: fix tests when running with -msan

Currently go test -msan runtime always fails on loong64, arm64
and amd64. Changed the variable name to sz to match the
function prototypes.

For #64256

Change-Id: Ida71197307016520deb39293927850d47845140a
GitHub-Last-Rev: 0ee1e3b
GitHub-Pull-Request: #64572
Reviewed-on: https://go-review.googlesource.com/c/go/+/547696
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Keith Randall <khr@golang.org>

Author: mauri870

src/runtime/msan_amd64.s

@@ -28,7 +28,7 @@
 // Called from msanread.
 TEXT	runtime·domsanread(SB), NOSPLIT, $0-16
 	MOVQ	addr+0(FP), RARG0
-	MOVQ	size+8(FP), RARG1
+	MOVQ	sz+8(FP), RARG1
 	// void __msan_read_go(void *addr, uintptr_t sz);
 	MOVQ	$__msan_read_go(SB), AX
 	JMP	msancall<>(SB)
@@ -37,23 +37,23 @@ TEXT	runtime·domsanread(SB), NOSPLIT, $0-16
 // Called from instrumented code.
 TEXT	runtime·msanwrite(SB), NOSPLIT, $0-16
 	MOVQ	addr+0(FP), RARG0
-	MOVQ	size+8(FP), RARG1
+	MOVQ	sz+8(FP), RARG1
 	// void __msan_write_go(void *addr, uintptr_t sz);
 	MOVQ	$__msan_write_go(SB), AX
 	JMP	msancall<>(SB)
 
 // func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
 TEXT	runtime·msanmalloc(SB), NOSPLIT, $0-16
 	MOVQ	addr+0(FP), RARG0
-	MOVQ	size+8(FP), RARG1
+	MOVQ	sz+8(FP), RARG1
 	// void __msan_malloc_go(void *addr, uintptr_t sz);
 	MOVQ	$__msan_malloc_go(SB), AX
 	JMP	msancall<>(SB)
 
 // func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
 TEXT	runtime·msanfree(SB), NOSPLIT, $0-16
 	MOVQ	addr+0(FP), RARG0
-	MOVQ	size+8(FP), RARG1
+	MOVQ	sz+8(FP), RARG1
 	// void __msan_free_go(void *addr, uintptr_t sz);
 	MOVQ	$__msan_free_go(SB), AX
 	JMP	msancall<>(SB)
@@ -62,7 +62,7 @@ TEXT	runtime·msanfree(SB), NOSPLIT, $0-16
 TEXT	runtime·msanmove(SB), NOSPLIT, $0-24
 	MOVQ	dst+0(FP), RARG0
 	MOVQ	src+8(FP), RARG1
-	MOVQ	size+16(FP), RARG2
+	MOVQ	sz+16(FP), RARG2
 	// void __msan_memmove(void *dst, void *src, uintptr_t sz);
 	MOVQ	$__msan_memmove(SB), AX
 	JMP	msancall<>(SB)

src/runtime/msan_arm64.s

@@ -16,7 +16,7 @@
 // Called from msanread.
 TEXT	runtime·domsanread(SB), NOSPLIT, $0-16
 	MOVD	addr+0(FP), RARG0
-	MOVD	size+8(FP), RARG1
+	MOVD	sz+8(FP), RARG1
 	// void __msan_read_go(void *addr, uintptr_t sz);
 	MOVD	$__msan_read_go(SB), FARG
 	JMP	msancall<>(SB)
@@ -25,23 +25,23 @@ TEXT	runtime·domsanread(SB), NOSPLIT, $0-16
 // Called from instrumented code.
 TEXT	runtime·msanwrite(SB), NOSPLIT, $0-16
 	MOVD	addr+0(FP), RARG0
-	MOVD	size+8(FP), RARG1
+	MOVD	sz+8(FP), RARG1
 	// void __msan_write_go(void *addr, uintptr_t sz);
 	MOVD	$__msan_write_go(SB), FARG
 	JMP	msancall<>(SB)
 
 // func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
 TEXT	runtime·msanmalloc(SB), NOSPLIT, $0-16
 	MOVD	addr+0(FP), RARG0
-	MOVD	size+8(FP), RARG1
+	MOVD	sz+8(FP), RARG1
 	// void __msan_malloc_go(void *addr, uintptr_t sz);
 	MOVD	$__msan_malloc_go(SB), FARG
 	JMP	msancall<>(SB)
 
 // func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
 TEXT	runtime·msanfree(SB), NOSPLIT, $0-16
 	MOVD	addr+0(FP), RARG0
-	MOVD	size+8(FP), RARG1
+	MOVD	sz+8(FP), RARG1
 	// void __msan_free_go(void *addr, uintptr_t sz);
 	MOVD	$__msan_free_go(SB), FARG
 	JMP	msancall<>(SB)
@@ -50,7 +50,7 @@ TEXT	runtime·msanfree(SB), NOSPLIT, $0-16
 TEXT	runtime·msanmove(SB), NOSPLIT, $0-24
 	MOVD	dst+0(FP), RARG0
 	MOVD	src+8(FP), RARG1
-	MOVD	size+16(FP), RARG2
+	MOVD	sz+16(FP), RARG2
 	// void __msan_memmove(void *dst, void *src, uintptr_t sz);
 	MOVD	$__msan_memmove(SB), FARG
 	JMP	msancall<>(SB)

src/runtime/msan_loong64.s

@@ -16,7 +16,7 @@
 // Called from msanread.
 TEXT	runtime·domsanread(SB), NOSPLIT, $0-16
 	MOVV	addr+0(FP), RARG0
-	MOVV	size+8(FP), RARG1
+	MOVV	sz+8(FP), RARG1
 	// void __msan_read_go(void *addr, uintptr_t sz);
 	MOVV	$__msan_read_go(SB), FARG
 	JMP	msancall<>(SB)
@@ -25,23 +25,23 @@ TEXT	runtime·domsanread(SB), NOSPLIT, $0-16
 // Called from instrumented code.
 TEXT	runtime·msanwrite(SB), NOSPLIT, $0-16
 	MOVV	addr+0(FP), RARG0
-	MOVV	size+8(FP), RARG1
+	MOVV	sz+8(FP), RARG1
 	// void __msan_write_go(void *addr, uintptr_t sz);
 	MOVV	$__msan_write_go(SB), FARG
 	JMP	msancall<>(SB)
 
 // func runtime·msanmalloc(addr unsafe.Pointer, sz uintptr)
 TEXT	runtime·msanmalloc(SB), NOSPLIT, $0-16
 	MOVV	addr+0(FP), RARG0
-	MOVV	size+8(FP), RARG1
+	MOVV	sz+8(FP), RARG1
 	// void __msan_malloc_go(void *addr, uintptr_t sz);
 	MOVV	$__msan_malloc_go(SB), FARG
 	JMP	msancall<>(SB)
 
 // func runtime·msanfree(addr unsafe.Pointer, sz uintptr)
 TEXT	runtime·msanfree(SB), NOSPLIT, $0-16
 	MOVV	addr+0(FP), RARG0
-	MOVV	size+8(FP), RARG1
+	MOVV	sz+8(FP), RARG1
 	// void __msan_free_go(void *addr, uintptr_t sz);
 	MOVV	$__msan_free_go(SB), FARG
 	JMP	msancall<>(SB)
@@ -50,7 +50,7 @@ TEXT	runtime·msanfree(SB), NOSPLIT, $0-16
 TEXT	runtime·msanmove(SB), NOSPLIT, $0-24
 	MOVV	dst+0(FP), RARG0
 	MOVV	src+8(FP), RARG1
-	MOVV	size+16(FP), RARG2
+	MOVV	sz+16(FP), RARG2
 	// void __msan_memmove(void *dst, void *src, uintptr_t sz);
 	MOVV	$__msan_memmove(SB), FARG
 	JMP	msancall<>(SB)