From ba09d06e166a06b4405b2ffd92df6acf222d281f Mon Sep 17 00:00:00 2001
From: Jeremy Jackins <jeremyjackins@gmail.com>
Date: Thu, 7 Apr 2016 15:42:35 +0900
Subject: [PATCH] runtime: remove remaining references to TheChar

After mdempsky's recent changes, these are the only references to
"TheChar" left in the Go tree. Without the context, and without
knowing the history, this is confusing.

Also rename sys.TheGoos and sys.TheGoarch to sys.GOOS
and sys.GOARCH.

Also change the heap dump format to include sys.GOARCH
rather than TheChar, which is no longer a concept.

Updates #15169 (changes heapdump format)

Change-Id: I3e99eeeae00ed55d7d01e6ed503d958c6e931dca
Reviewed-on: https://go-review.googlesource.com/21647
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
---
 src/runtime/extern.go                        |  4 ++--
 src/runtime/heapdump.go                      |  2 +-
 src/runtime/internal/sys/arch.go             | 17 +++++++++++++++++
 src/runtime/internal/sys/arch_386.go         |  2 +-
 src/runtime/internal/sys/arch_amd64.go       |  2 +-
 src/runtime/internal/sys/arch_amd64p32.go    |  2 +-
 src/runtime/internal/sys/arch_arm.go         |  2 +-
 src/runtime/internal/sys/arch_arm64.go       |  2 +-
 src/runtime/internal/sys/arch_mips64.go      |  2 +-
 src/runtime/internal/sys/arch_mips64le.go    |  2 +-
 src/runtime/internal/sys/arch_ppc64.go       |  2 +-
 src/runtime/internal/sys/arch_ppc64le.go     |  2 +-
 src/runtime/internal/sys/arch_s390x.go       |  2 +-
 src/runtime/internal/sys/gengoos.go          |  4 ++--
 src/runtime/internal/sys/zgoarch_386.go      |  2 +-
 src/runtime/internal/sys/zgoarch_amd64.go    |  2 +-
 src/runtime/internal/sys/zgoarch_amd64p32.go |  2 +-
 src/runtime/internal/sys/zgoarch_arm.go      |  2 +-
 src/runtime/internal/sys/zgoarch_arm64.go    |  2 +-
 src/runtime/internal/sys/zgoarch_mips64.go   |  2 +-
 src/runtime/internal/sys/zgoarch_mips64le.go |  2 +-
 src/runtime/internal/sys/zgoarch_ppc64.go    |  2 +-
 src/runtime/internal/sys/zgoarch_ppc64le.go  |  2 +-
 src/runtime/internal/sys/zgoarch_s390x.go    |  2 +-
 src/runtime/internal/sys/zgoos_android.go    |  2 +-
 src/runtime/internal/sys/zgoos_darwin.go     |  2 +-
 src/runtime/internal/sys/zgoos_dragonfly.go  |  2 +-
 src/runtime/internal/sys/zgoos_freebsd.go    |  2 +-
 src/runtime/internal/sys/zgoos_linux.go      |  2 +-
 src/runtime/internal/sys/zgoos_nacl.go       |  2 +-
 src/runtime/internal/sys/zgoos_netbsd.go     |  2 +-
 src/runtime/internal/sys/zgoos_openbsd.go    |  2 +-
 src/runtime/internal/sys/zgoos_plan9.go      |  2 +-
 src/runtime/internal/sys/zgoos_solaris.go    |  2 +-
 src/runtime/internal/sys/zgoos_windows.go    |  2 +-
 src/runtime/mgcmark.go                       |  4 ++--
 src/runtime/stack.go                         |  8 ++++----
 37 files changed, 59 insertions(+), 42 deletions(-)
 create mode 100644 src/runtime/internal/sys/arch.go

diff --git a/src/runtime/extern.go b/src/runtime/extern.go
index 1d8304f4fc..1df8691cfc 100644
--- a/src/runtime/extern.go
+++ b/src/runtime/extern.go
@@ -224,8 +224,8 @@ func Version() string {
 
 // GOOS is the running program's operating system target:
 // one of darwin, freebsd, linux, and so on.
-const GOOS string = sys.TheGoos
+const GOOS string = sys.GOOS
 
 // GOARCH is the running program's architecture target:
 // 386, amd64, arm, or s390x.
-const GOARCH string = sys.TheGoarch
+const GOARCH string = sys.GOARCH
diff --git a/src/runtime/heapdump.go b/src/runtime/heapdump.go
index e6a41f7f97..2410b1954a 100644
--- a/src/runtime/heapdump.go
+++ b/src/runtime/heapdump.go
@@ -496,7 +496,7 @@ func dumpparams() {
 	dumpint(sys.PtrSize)
 	dumpint(uint64(mheap_.arena_start))
 	dumpint(uint64(mheap_.arena_used))
-	dumpint(sys.TheChar)
+	dumpstr(sys.GOARCH)
 	dumpstr(sys.Goexperiment)
 	dumpint(uint64(ncpu))
 }
diff --git a/src/runtime/internal/sys/arch.go b/src/runtime/internal/sys/arch.go
new file mode 100644
index 0000000000..c1757041d8
--- /dev/null
+++ b/src/runtime/internal/sys/arch.go
@@ -0,0 +1,17 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package sys
+
+type ArchFamilyType int
+
+const (
+	AMD64 ArchFamilyType = iota
+	ARM
+	ARM64
+	I386
+	MIPS64
+	PPC64
+	S390X
+)
diff --git a/src/runtime/internal/sys/arch_386.go b/src/runtime/internal/sys/arch_386.go
index 1f1c704f9a..48c42f7584 100644
--- a/src/runtime/internal/sys/arch_386.go
+++ b/src/runtime/internal/sys/arch_386.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '8'
+	ArchFamily    = I386
 	BigEndian     = 0
 	CacheLineSize = 64
 	PhysPageSize  = GoosNacl*65536 + (1-GoosNacl)*4096 // 4k normally; 64k on NaCl
diff --git a/src/runtime/internal/sys/arch_amd64.go b/src/runtime/internal/sys/arch_amd64.go
index 80fff557f2..1bbdb99e07 100644
--- a/src/runtime/internal/sys/arch_amd64.go
+++ b/src/runtime/internal/sys/arch_amd64.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '6'
+	ArchFamily    = AMD64
 	BigEndian     = 0
 	CacheLineSize = 64
 	PhysPageSize  = 4096
diff --git a/src/runtime/internal/sys/arch_amd64p32.go b/src/runtime/internal/sys/arch_amd64p32.go
index ca29f698a2..b7011a4ff2 100644
--- a/src/runtime/internal/sys/arch_amd64p32.go
+++ b/src/runtime/internal/sys/arch_amd64p32.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '6'
+	ArchFamily    = AMD64
 	BigEndian     = 0
 	CacheLineSize = 64
 	PhysPageSize  = 65536*GoosNacl + 4096*(1-GoosNacl)
diff --git a/src/runtime/internal/sys/arch_arm.go b/src/runtime/internal/sys/arch_arm.go
index b185e8fb69..f90f52da7f 100644
--- a/src/runtime/internal/sys/arch_arm.go
+++ b/src/runtime/internal/sys/arch_arm.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '5'
+	ArchFamily    = ARM
 	BigEndian     = 0
 	CacheLineSize = 32
 	PhysPageSize  = 65536*GoosNacl + 4096*(1-GoosNacl)
diff --git a/src/runtime/internal/sys/arch_arm64.go b/src/runtime/internal/sys/arch_arm64.go
index b63a7a6f9a..aaaa4b0947 100644
--- a/src/runtime/internal/sys/arch_arm64.go
+++ b/src/runtime/internal/sys/arch_arm64.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '7'
+	ArchFamily    = ARM64
 	BigEndian     = 0
 	CacheLineSize = 32
 	PhysPageSize  = 65536
diff --git a/src/runtime/internal/sys/arch_mips64.go b/src/runtime/internal/sys/arch_mips64.go
index 5b933d4e1a..d5672599d2 100644
--- a/src/runtime/internal/sys/arch_mips64.go
+++ b/src/runtime/internal/sys/arch_mips64.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '0'
+	ArchFamily    = MIPS64
 	BigEndian     = 1
 	CacheLineSize = 32
 	PhysPageSize  = 16384
diff --git a/src/runtime/internal/sys/arch_mips64le.go b/src/runtime/internal/sys/arch_mips64le.go
index ce2e98b19f..f8cdf2b2d2 100644
--- a/src/runtime/internal/sys/arch_mips64le.go
+++ b/src/runtime/internal/sys/arch_mips64le.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '0'
+	ArchFamily    = MIPS64
 	BigEndian     = 0
 	CacheLineSize = 32
 	PhysPageSize  = 16384
diff --git a/src/runtime/internal/sys/arch_ppc64.go b/src/runtime/internal/sys/arch_ppc64.go
index 3aa07e1f56..cdec63ff71 100644
--- a/src/runtime/internal/sys/arch_ppc64.go
+++ b/src/runtime/internal/sys/arch_ppc64.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '9'
+	ArchFamily    = PPC64
 	BigEndian     = 1
 	CacheLineSize = 64
 	PhysPageSize  = 65536
diff --git a/src/runtime/internal/sys/arch_ppc64le.go b/src/runtime/internal/sys/arch_ppc64le.go
index 0f02f0bf3c..4fd68f9ce3 100644
--- a/src/runtime/internal/sys/arch_ppc64le.go
+++ b/src/runtime/internal/sys/arch_ppc64le.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = '9'
+	ArchFamily    = PPC64
 	BigEndian     = 0
 	CacheLineSize = 64
 	PhysPageSize  = 65536
diff --git a/src/runtime/internal/sys/arch_s390x.go b/src/runtime/internal/sys/arch_s390x.go
index 8690571c81..ca1cb8646e 100644
--- a/src/runtime/internal/sys/arch_s390x.go
+++ b/src/runtime/internal/sys/arch_s390x.go
@@ -5,7 +5,7 @@
 package sys
 
 const (
-	TheChar       = 'z'
+	ArchFamily    = S390X
 	BigEndian     = 1
 	CacheLineSize = 256
 	PhysPageSize  = 4096
diff --git a/src/runtime/internal/sys/gengoos.go b/src/runtime/internal/sys/gengoos.go
index e2bd87de4e..4c45c0af02 100644
--- a/src/runtime/internal/sys/gengoos.go
+++ b/src/runtime/internal/sys/gengoos.go
@@ -50,7 +50,7 @@ func main() {
 			fmt.Fprintf(&buf, "// +build !android\n\n") // must explicitly exclude android for linux
 		}
 		fmt.Fprintf(&buf, "package sys\n\n")
-		fmt.Fprintf(&buf, "const TheGoos = `%s`\n\n", target)
+		fmt.Fprintf(&buf, "const GOOS = `%s`\n\n", target)
 		for _, goos := range gooses {
 			value := 0
 			if goos == target {
@@ -68,7 +68,7 @@ func main() {
 		var buf bytes.Buffer
 		fmt.Fprintf(&buf, "// generated by gengoos.go using 'go generate'\n\n")
 		fmt.Fprintf(&buf, "package sys\n\n")
-		fmt.Fprintf(&buf, "const TheGoarch = `%s`\n\n", target)
+		fmt.Fprintf(&buf, "const GOARCH = `%s`\n\n", target)
 		for _, goarch := range goarches {
 			value := 0
 			if goarch == target {
diff --git a/src/runtime/internal/sys/zgoarch_386.go b/src/runtime/internal/sys/zgoarch_386.go
index 3ad244509d..3bcf83b8e3 100644
--- a/src/runtime/internal/sys/zgoarch_386.go
+++ b/src/runtime/internal/sys/zgoarch_386.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `386`
+const GOARCH = `386`
 
 const Goarch386 = 1
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_amd64.go b/src/runtime/internal/sys/zgoarch_amd64.go
index 7c858e3f5d..699f191fba 100644
--- a/src/runtime/internal/sys/zgoarch_amd64.go
+++ b/src/runtime/internal/sys/zgoarch_amd64.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `amd64`
+const GOARCH = `amd64`
 
 const Goarch386 = 0
 const GoarchAmd64 = 1
diff --git a/src/runtime/internal/sys/zgoarch_amd64p32.go b/src/runtime/internal/sys/zgoarch_amd64p32.go
index 772031c090..cc2d658406 100644
--- a/src/runtime/internal/sys/zgoarch_amd64p32.go
+++ b/src/runtime/internal/sys/zgoarch_amd64p32.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `amd64p32`
+const GOARCH = `amd64p32`
 
 const Goarch386 = 0
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_arm.go b/src/runtime/internal/sys/zgoarch_arm.go
index 276e8a869b..a5fd789f13 100644
--- a/src/runtime/internal/sys/zgoarch_arm.go
+++ b/src/runtime/internal/sys/zgoarch_arm.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `arm`
+const GOARCH = `arm`
 
 const Goarch386 = 0
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_arm64.go b/src/runtime/internal/sys/zgoarch_arm64.go
index d124ec0343..084d2c7330 100644
--- a/src/runtime/internal/sys/zgoarch_arm64.go
+++ b/src/runtime/internal/sys/zgoarch_arm64.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `arm64`
+const GOARCH = `arm64`
 
 const Goarch386 = 0
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_mips64.go b/src/runtime/internal/sys/zgoarch_mips64.go
index b4a97d6da9..2ad62bd68c 100644
--- a/src/runtime/internal/sys/zgoarch_mips64.go
+++ b/src/runtime/internal/sys/zgoarch_mips64.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `mips64`
+const GOARCH = `mips64`
 
 const Goarch386 = 0
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_mips64le.go b/src/runtime/internal/sys/zgoarch_mips64le.go
index 3328a35bd2..047c8b425a 100644
--- a/src/runtime/internal/sys/zgoarch_mips64le.go
+++ b/src/runtime/internal/sys/zgoarch_mips64le.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `mips64le`
+const GOARCH = `mips64le`
 
 const Goarch386 = 0
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_ppc64.go b/src/runtime/internal/sys/zgoarch_ppc64.go
index 06f78b2023..748b5b562c 100644
--- a/src/runtime/internal/sys/zgoarch_ppc64.go
+++ b/src/runtime/internal/sys/zgoarch_ppc64.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `ppc64`
+const GOARCH = `ppc64`
 
 const Goarch386 = 0
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_ppc64le.go b/src/runtime/internal/sys/zgoarch_ppc64le.go
index 50b56dbe3f..d3dcba467d 100644
--- a/src/runtime/internal/sys/zgoarch_ppc64le.go
+++ b/src/runtime/internal/sys/zgoarch_ppc64le.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `ppc64le`
+const GOARCH = `ppc64le`
 
 const Goarch386 = 0
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_s390x.go b/src/runtime/internal/sys/zgoarch_s390x.go
index ce85f20e0a..1ead5d573c 100644
--- a/src/runtime/internal/sys/zgoarch_s390x.go
+++ b/src/runtime/internal/sys/zgoarch_s390x.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoarch = `s390x`
+const GOARCH = `s390x`
 
 const Goarch386 = 0
 const GoarchAmd64 = 0
diff --git a/src/runtime/internal/sys/zgoos_android.go b/src/runtime/internal/sys/zgoos_android.go
index 03d91760ed..6503b15246 100644
--- a/src/runtime/internal/sys/zgoos_android.go
+++ b/src/runtime/internal/sys/zgoos_android.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `android`
+const GOOS = `android`
 
 const GoosAndroid = 1
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_darwin.go b/src/runtime/internal/sys/zgoos_darwin.go
index eb2efeb7af..6a285984bd 100644
--- a/src/runtime/internal/sys/zgoos_darwin.go
+++ b/src/runtime/internal/sys/zgoos_darwin.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `darwin`
+const GOOS = `darwin`
 
 const GoosAndroid = 0
 const GoosDarwin = 1
diff --git a/src/runtime/internal/sys/zgoos_dragonfly.go b/src/runtime/internal/sys/zgoos_dragonfly.go
index 403cf65311..886ac2698f 100644
--- a/src/runtime/internal/sys/zgoos_dragonfly.go
+++ b/src/runtime/internal/sys/zgoos_dragonfly.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `dragonfly`
+const GOOS = `dragonfly`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_freebsd.go b/src/runtime/internal/sys/zgoos_freebsd.go
index 632d5db9db..0bf2403eab 100644
--- a/src/runtime/internal/sys/zgoos_freebsd.go
+++ b/src/runtime/internal/sys/zgoos_freebsd.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `freebsd`
+const GOOS = `freebsd`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_linux.go b/src/runtime/internal/sys/zgoos_linux.go
index 2d43869a84..c8664db15d 100644
--- a/src/runtime/internal/sys/zgoos_linux.go
+++ b/src/runtime/internal/sys/zgoos_linux.go
@@ -4,7 +4,7 @@
 
 package sys
 
-const TheGoos = `linux`
+const GOOS = `linux`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_nacl.go b/src/runtime/internal/sys/zgoos_nacl.go
index a56b6ef3c9..054122638a 100644
--- a/src/runtime/internal/sys/zgoos_nacl.go
+++ b/src/runtime/internal/sys/zgoos_nacl.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `nacl`
+const GOOS = `nacl`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_netbsd.go b/src/runtime/internal/sys/zgoos_netbsd.go
index 46fd0a7cd5..5c509a1250 100644
--- a/src/runtime/internal/sys/zgoos_netbsd.go
+++ b/src/runtime/internal/sys/zgoos_netbsd.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `netbsd`
+const GOOS = `netbsd`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_openbsd.go b/src/runtime/internal/sys/zgoos_openbsd.go
index 7ee650afbb..dc43157d49 100644
--- a/src/runtime/internal/sys/zgoos_openbsd.go
+++ b/src/runtime/internal/sys/zgoos_openbsd.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `openbsd`
+const GOOS = `openbsd`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_plan9.go b/src/runtime/internal/sys/zgoos_plan9.go
index 162e7f6260..4b0934f77a 100644
--- a/src/runtime/internal/sys/zgoos_plan9.go
+++ b/src/runtime/internal/sys/zgoos_plan9.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `plan9`
+const GOOS = `plan9`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_solaris.go b/src/runtime/internal/sys/zgoos_solaris.go
index b2a8f98504..42511a36ad 100644
--- a/src/runtime/internal/sys/zgoos_solaris.go
+++ b/src/runtime/internal/sys/zgoos_solaris.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `solaris`
+const GOOS = `solaris`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/internal/sys/zgoos_windows.go b/src/runtime/internal/sys/zgoos_windows.go
index 817ec79e4c..d77f62c396 100644
--- a/src/runtime/internal/sys/zgoos_windows.go
+++ b/src/runtime/internal/sys/zgoos_windows.go
@@ -2,7 +2,7 @@
 
 package sys
 
-const TheGoos = `windows`
+const GOOS = `windows`
 
 const GoosAndroid = 0
 const GoosDarwin = 0
diff --git a/src/runtime/mgcmark.go b/src/runtime/mgcmark.go
index 66d61bae1e..1ab8315a29 100644
--- a/src/runtime/mgcmark.go
+++ b/src/runtime/mgcmark.go
@@ -719,8 +719,8 @@ func scanframeworker(frame *stkframe, cache *pcvalueCache, gcw *gcWork) {
 	// Scan local variables if stack frame has been allocated.
 	size := frame.varp - frame.sp
 	var minsize uintptr
-	switch sys.TheChar {
-	case '7':
+	switch sys.ArchFamily {
+	case sys.ARM64:
 		minsize = sys.SpAlign
 	default:
 		minsize = sys.MinFrameSize
diff --git a/src/runtime/stack.go b/src/runtime/stack.go
index fdd6710bad..dcb1b06dbd 100644
--- a/src/runtime/stack.go
+++ b/src/runtime/stack.go
@@ -634,8 +634,8 @@ func adjustframe(frame *stkframe, arg unsafe.Pointer) bool {
 	// Adjust local variables if stack frame has been allocated.
 	size := frame.varp - frame.sp
 	var minsize uintptr
-	switch sys.TheChar {
-	case '7':
+	switch sys.ArchFamily {
+	case sys.ARM64:
 		minsize = sys.SpAlign
 	default:
 		minsize = sys.MinFrameSize
@@ -662,7 +662,7 @@ func adjustframe(frame *stkframe, arg unsafe.Pointer) bool {
 	}
 
 	// Adjust saved base pointer if there is one.
-	if sys.TheChar == '6' && frame.argp-frame.varp == 2*sys.RegSize {
+	if sys.ArchFamily == sys.AMD64 && frame.argp-frame.varp == 2*sys.RegSize {
 		if !framepointer_enabled {
 			print("runtime: found space for saved base pointer, but no framepointer experiment\n")
 			print("argp=", hex(frame.argp), " varp=", hex(frame.varp), "\n")
@@ -969,7 +969,7 @@ func newstack() {
 		throw("missing stack in newstack")
 	}
 	sp := gp.sched.sp
-	if sys.TheChar == '6' || sys.TheChar == '8' {
+	if sys.ArchFamily == sys.AMD64 || sys.ArchFamily == sys.I386 {
 		// The call to morestack cost a word.
 		sp -= sys.PtrSize
 	}
-- 
2.48.1