code review 10169045: runtime: adjust traceback / garbage collector boundary

src/pkg/runtime/runtime.h

 // Copyright 2009 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.
 
 /*
  * basic types
  */
 typedef signed char             int8;
 typedef unsigned char           uint8;
 typedef signed short            int16;
@@ skipping 639 matching lines @@
         Panic*  link;           // link to earlier panic
         bool    recovered;      // whether this panic is over
 };
 
 /*
  * stack traces
  */
 typedef struct Stkframe Stkframe;
 struct Stkframe
 {
-        Func *fn;       // function being run
-        uintptr pc;     // program counter within fn
-        uintptr lr;     // program counter at caller aka link register
-        uintptr sp;     // stack pointer at pc
-        uintptr fp;     // stack pointer at caller aka frame pointer
-        byte* argp;     // pointer to function arguments
-        uintptr arglen; // number of bytes at argp
-        byte *varp;     // pointer to local variables
-        uintptr varlen; // number of bytes at varp
+        Func*   fn;     // function being run
+        uintptr pc;     // program counter within fn
+        uintptr lr;     // program counter at caller aka link register
+        uintptr sp;     // stack pointer at pc
+        uintptr fp;     // stack pointer at caller aka frame pointer
+        byte*   argp;   // pointer to function arguments
+        uintptr arglen; // number of bytes at argp
+        byte*   varp;   // pointer to local variables
+        uintptr varlen; // number of bytes at varp
 };
 
 int32   runtime·gentraceback(uintptr, uintptr, uintptr, G*, int32, uintptr*, int32, void(*)(Stkframe*, void*), void*);
-
+void    runtime·traceback(uintptr pc, uintptr sp, uintptr lr, G* gp);
+void    runtime·tracebackothers(G*);
 
 /*
  * external data
  */
 extern  String  runtime·emptystring;
 extern  uintptr runtime·zerobase;
 extern  G*      runtime·allg;
 extern  G*      runtime·lastg;
 extern  M*      runtime·allm;
 extern  P**     runtime·allp;
@@ skipping 48 matching lines @@
 String  runtime·gostring(byte*);
 String  runtime·gostringn(byte*, intgo);
 Slice   runtime·gobytes(byte*, intgo);
 String  runtime·gostringnocopy(byte*);
 String  runtime·gostringw(uint16*);
 void    runtime·initsig(void);
 void    runtime·sigenable(uint32 sig);
 void    runtime·sigdisable(uint32 sig);
 int32   runtime·gotraceback(bool *crash);
 void    runtime·goroutineheader(G*);
-void    runtime·traceback(uintptr pc, uintptr sp, uintptr lr, G* gp);
-void    runtime·tracebackothers(G*);
 int32   runtime·open(int8*, int32, int32);
 int32   runtime·read(int32, void*, int32);
 int32   runtime·write(int32, void*, int32);
 int32   runtime·close(int32);
 int32   runtime·mincore(void*, uintptr, byte*);
 bool    runtime·cas(uint32*, uint32, uint32);
 bool    runtime·cas64(uint64*, uint64*, uint64);
 bool    runtime·casp(void**, void*, void*);
 // Don't confuse with XADD x86 instruction,
 // this one is actually 'addx', that is, add-and-fetch.
@@ skipping 276 matching lines @@
 extern float64 runtime·neginf;
 extern uint64 ·nan;
 extern uint64 ·posinf;
 extern uint64 ·neginf;
 #define ISNAN(f) ((f) != (f))
 
 enum
 {
         UseSpanType = 1,
 };