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child_info::child_info: Fix a comment

This commit is contained in:
Corinna Vinschen 2015-12-15 17:14:08 +01:00
parent ecea753689
commit b87224fba5
1 changed files with 2 additions and 7 deletions
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9
winsup/cygwin/sigproc.cc
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@ -776,13 +776,8 @@ child_info::child_info (unsigned in_cb, child_info_types chtype,
This seems to be a bug in Vista's WOW64, which apparently copies the This seems to be a bug in Vista's WOW64, which apparently copies the
lpReserved2 datastructure not using the cbReserved2 size information, lpReserved2 datastructure not using the cbReserved2 size information,
but using the information given in the first DWORD within lpReserved2 but using the information given in the first DWORD within lpReserved2
instead. 32 bit Windows and former WOW64 don't care if msv_count is 0 instead. However, it's not clear if a non-0 count doesn't result in
or a sensible non-0 count value. However, it's not clear if a non-0 trying to evaluate the content, so we do this really only for Vista 64.
count doesn't result in trying to evaluate the content, so we do this
really only for Vista 64 for now.
Note: It turns out that a non-zero value *does* harm operation on
XP 64 and 2K3 64 (Crash in CreateProcess call).
The value is sizeof (child_info_*) / 5 which results in a count which The value is sizeof (child_info_*) / 5 which results in a count which
covers the full datastructure, plus not more than 4 extra bytes. This covers the full datastructure, plus not more than 4 extra bytes. This