Expose GC_setStackBottom (#7885)

lib/system/gc_common.nim

@@ -200,7 +200,7 @@ when declared(threadType):
     if threadType == ThreadType.None:
       initAllocator()
       var stackTop {.volatile.}: pointer
-      setStackBottom(addr(stackTop))
+      nimGC_setStackBottom(addr(stackTop))
       initGC()
       threadType = ThreadType.ForeignThread
 
@@ -257,7 +257,7 @@ when nimCoroutines:
     gch.activeStack.setPosition(addr(sp))
 
 when not defined(useNimRtl):
-  proc setStackBottom(theStackBottom: pointer) =
+  proc nimGC_setStackBottom(theStackBottom: pointer) =
     # Initializes main stack of the thread.
     when nimCoroutines:
       if gch.stack.next == nil:

lib/system/gc_regions.nim

@@ -401,7 +401,7 @@ proc getFreeMem*(r: MemRegion): int = r.remaining
 proc getTotalMem*(r: MemRegion): int =
   result = r.totalSize
 
-proc setStackBottom(theStackBottom: pointer) = discard
+proc nimGC_setStackBottom(theStackBottom: pointer) = discard
 
 proc nimGCref(x: pointer) {.compilerProc.} = discard
 proc nimGCunref(x: pointer) {.compilerProc.} = discard

lib/system/mmdisp.nim

@@ -146,7 +146,7 @@ when defined(boehmgc):
     proc getFreeMem(): int = return boehmGetFreeBytes()
     proc getTotalMem(): int = return boehmGetHeapSize()
 
-    proc setStackBottom(theStackBottom: pointer) = discard
+    proc nimGC_setStackBottom(theStackBottom: pointer) = discard
 
   proc initGC() =
     boehmGCinit()
@@ -305,7 +305,7 @@ elif defined(gogc):
     goRuntime_ReadMemStats(addr mstats)
     result = int(mstats.sys)
 
-  proc setStackBottom(theStackBottom: pointer) = discard
+  proc nimGC_setStackBottom(theStackBottom: pointer) = discard
 
   proc alloc(size: Natural): pointer =
     result = c_malloc(size)
@@ -449,7 +449,7 @@ elif defined(nogc) and defined(useMalloc):
     proc getFreeMem(): int = discard
     proc getTotalMem(): int = discard
 
-    proc setStackBottom(theStackBottom: pointer) = discard
+    proc nimGC_setStackBottom(theStackBottom: pointer) = discard
 
   proc initGC() = discard
 
@@ -523,7 +523,7 @@ elif defined(nogc):
   proc growObj(old: pointer, newsize: int): pointer =
     result = realloc(old, newsize)
 
-  proc setStackBottom(theStackBottom: pointer) = discard
+  proc nimGC_setStackBottom(theStackBottom: pointer) = discard
   proc nimGCref(p: pointer) {.compilerproc, inline.} = discard
   proc nimGCunref(p: pointer) {.compilerproc, inline.} = discard
 

lib/system/threads.nim

@@ -440,7 +440,7 @@ proc threadProcWrapStackFrame[TArg](thrd: ptr Thread[TArg]) =
       threadProcWrapDispatch[TArg]
     when not hasSharedHeap:
       # init the GC for refc/markandsweep
-      setStackBottom(addr(p))
+      nimGC_setStackBottom(addr(p))
       initGC()
       when declared(threadType):
         threadType = ThreadType.NimThread