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Diffstat (limited to 'winsup/cygwin/cygheap.cc')
| -rw-r--r-- | winsup/cygwin/cygheap.cc | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/winsup/cygwin/cygheap.cc b/winsup/cygwin/cygheap.cc index caeda7b3a..c55dce9d4 100644 --- a/winsup/cygwin/cygheap.cc +++ b/winsup/cygwin/cygheap.cc @@ -162,6 +162,29 @@ cygheap_init () if (!cygheap->sigs) sigalloc (); + /* TODO: This is plain wrong. There's a difference between global shared + memory and every other global object. It's still allowed to + create any global object from a process not having the + SE_CREATE_GLOBAL_NAME privilege. It's only disallowed to create + global shared memory objects when not running in session 0 or + when not having the privilege. + + The end result should look like this: + - All objects shared between multiple processes except shared + memory should always be created as global objects. + - Shared memory only needed locally should stick to being session + local. + - Every process should always try to create resp. open shared + memory as global. + - Only if that fails it should try to create the shared memory + as local shared memory, or ... + - ... the MS suggested workaround is to create a file backed shared + memory if a process has not the privilege to create global shared + memory. + + However, this has to be planned carefully, especially given that + every single process creates its own (resp. the child's) shared + memory area with the process specific information. */ if (!cygheap->shared_prefix) cygheap->shared_prefix = cstrdup ( wincap.has_terminal_services () |