runtime: delete cgo_allocate

This memory is untyped and can't be used anymore.
The next version of SWIG won't need it.

Change-Id: I592b287c5f5186975ee09a9b28d8efe3b57134e7
Reviewed-on: https://go-review.googlesource.com/8956
Reviewed-by: Ian Lance Taylor <iant@golang.org>

1 files changed, 0 insertions, 26 deletions

diff --git a/src/runtime/cgo/callbacks.go b/src/runtime/cgo/callbacks.go
index cbaf064bd8..1682341596 100644
--- a/src/runtime/cgo/callbacks.go
+++ b/src/runtime/cgo/callbacks.go
@@ -22,32 +22,6 @@ func _runtime_cgocallback(unsafe.Pointer, unsafe.Pointer, uintptr)
 //go:cgo_export_static crosscall2
 //go:cgo_export_dynamic crosscall2
 
-// Allocate memory.  This allocates the requested number of bytes in
-// memory controlled by the Go runtime.  The allocated memory will be
-// zeroed.  You are responsible for ensuring that the Go garbage
-// collector can see a pointer to the allocated memory for as long as
-// it is valid, e.g., by storing a pointer in a local variable in your
-// C function, or in memory allocated by the Go runtime.  If the only
-// pointers are in a C global variable or in memory allocated via
-// malloc, then the Go garbage collector may collect the memory.
-
-// Call like this in code compiled with gcc:
-//   struct { size_t len; void *ret; } a;
-//   a.len = /* number of bytes to allocate */;
-//   crosscall2(_cgo_allocate, &a, sizeof a);
-//   /* Here a.ret is a pointer to the allocated memory.  */
-
-//go:linkname _runtime_cgo_allocate_internal runtime._cgo_allocate_internal
-var _runtime_cgo_allocate_internal byte
-
-//go:linkname _cgo_allocate _cgo_allocate
-//go:cgo_export_static _cgo_allocate
-//go:cgo_export_dynamic _cgo_allocate
-//go:nosplit
-func _cgo_allocate(a unsafe.Pointer, n int32) {
-	_runtime_cgocallback(unsafe.Pointer(&_runtime_cgo_allocate_internal), a, uintptr(n))
-}
-
 // Panic.  The argument is converted into a Go string.
 
 // Call like this in code compiled with gcc: