runtime: convert traceback*.c to Go
The two converted files were nearly identical.
Instead of continuing that duplication, I merged them
into a single traceback.go.
Tested on arm, amd64, amd64p32, and 386.
LGTM=r
R=golang-codereviews, remyoudompheng, dave, r
CC=dvyukov, golang-codereviews, iant, khr
https://golang.org/cl/134200044
diff --git a/src/pkg/runtime/stubs.go b/src/pkg/runtime/stubs.go
index e057eb0..3106a15 100644
--- a/src/pkg/runtime/stubs.go
+++ b/src/pkg/runtime/stubs.go
@@ -12,6 +12,7 @@
// each function.
const ptrSize = 4 << (^uintptr(0) >> 63) // unsafe.Sizeof(uintptr(0)) but an ideal const
+const regSize = 4 << (^uintreg(0) >> 63) // unsafe.Sizeof(uintreg(0)) but an ideal const
//go:noescape
func racereadpc(addr unsafe.Pointer, callpc, pc uintptr)
@@ -141,7 +142,6 @@
func exitsyscall()
func goroutineheader(gp *g)
-func traceback(pc, sp, lr uintptr, gp *g)
func tracebackothers(gp *g)
func cgocallback(fn, frame unsafe.Pointer, framesize uintptr)
@@ -246,3 +246,21 @@
//go:noescape
func open(name *byte, mode, perm int32) int32
+
+//go:noescape
+func gotraceback(*bool) int32
+
+func funcname(*_func) *byte
+
+func gofuncname(f *_func) string {
+ return gostringnocopy(funcname(f))
+}
+
+const _NoArgs = ^uintptr(0)
+
+var newproc, deferproc, lessstack struct{} // C/assembly functions
+
+func funcspdelta(*_func, uintptr) int32 // symtab.c
+func funcarglen(*_func, uintptr) int32 // symtab.c
+const _ArgsSizeUnknown = -0x80000000 // funcdata.h
+func topofstack(*_func) bool // proc.c
