diff options
Diffstat (limited to 'winsup/cygwin/dcrt0.cc')
| -rw-r--r-- | winsup/cygwin/dcrt0.cc | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/winsup/cygwin/dcrt0.cc b/winsup/cygwin/dcrt0.cc index 92056c80f..a6eb2696d 100644 --- a/winsup/cygwin/dcrt0.cc +++ b/winsup/cygwin/dcrt0.cc @@ -398,6 +398,15 @@ child_info_fork::alloc_stack_hard_way (volatile char *b) int newlen; bool guard; + /* First check if the requested stack area is part of the user heap + or part of a mmaped region. If so, we have been started from a + pthread with an application-provided stack, and the stack has just + to be used as is. */ + if ((stacktop >= cygheap->user_heap.base + && stackbottom <= cygheap->user_heap.max) + || is_mmapped_region ((caddr_t) stacktop, (caddr_t) stackbottom)) + return; + if (!VirtualQuery ((LPCVOID) &b, &m, sizeof m)) api_fatal ("fork: couldn't get stack info, %E"); |