Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

write-fpm.test
; RUN: llvm-pdbutil yaml2pdb -pdb=%t.pdb %p/Inputs/one-symbol.yaml
; RUN: llvm-pdbutil bytes -fpm %t.pdb | FileCheck %s


CHECK:                             Free Page Map
CHECK-NEXT: ============================================================
CHECK-NEXT: Block 2 (
CHECK-NEXT:   2000: 00F8FFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................................|
CHECK-NEXT:   2020: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................................|
CHECK:        2FE0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................................|
CHECK:      )