diff options
Diffstat (limited to 'winsup/cygwin/net.cc')
| -rw-r--r-- | winsup/cygwin/net.cc | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/winsup/cygwin/net.cc b/winsup/cygwin/net.cc index 830a80051..a0a83b55a 100644 --- a/winsup/cygwin/net.cc +++ b/winsup/cygwin/net.cc @@ -1695,13 +1695,17 @@ get_adapters_addresses (PIP_ADAPTER_ADDRESSES *pa_ret, ULONG family) DWORD ret; gaa_wa param = { family, pa_ret ?: NULL }; - if ((uintptr_t) ¶m >= (uintptr_t) 0x80000000L) + if ((uintptr_t) ¶m >= (uintptr_t) 0x80000000L + && wincap.has_gaa_largeaddress_bug ()) { - /* Starting with Windows Vista, GetAdaptersAddresses fails with error 998, + /* In Windows Vista and Windows 7 under WOW64, GetAdaptersAddresses fails if it's running in a thread with a stack located in the large address area. So, if we're running in a pthread with such a stack, we call - GetAdaptersAddresses in a child thread with an OS-allocated stack, - which is guaranteed to be located in the lower address area. */ + GetAdaptersAddresses in a child thread with an OS-allocated stack. + The OS allocates stacks bottom up, so chances are good that the new + stack will be located in the lower address area. + FIXME: The problem is fixed in W8CP, but needs testing before W8 goes + gold. */ HANDLE thr = CreateThread (NULL, 0, call_gaa, ¶m, 0, NULL); if (!thr) { |