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| author | Corinna Vinschen <corinna@vinschen.de> | 2017-12-10 14:11:03 +0100 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2017-12-10 14:14:24 +0100 |
| commit | 67a657cb1d41e6ae90e9fdeba9e69fff09a2ea06 (patch) | |
| tree | 1a89c4af79fa80ef2717f94607383a4663527b86 /newlib/libc/stdlib | |
| parent | c6f14b3c81f5a40317452625ef8d56c2612fe776 (diff) | |
| download | newlib-67a657cb1d41e6ae90e9fdeba9e69fff09a2ea06.zip newlib-67a657cb1d41e6ae90e9fdeba9e69fff09a2ea06.tar.gz newlib-67a657cb1d41e6ae90e9fdeba9e69fff09a2ea06.tar.bz2 | |
cygwin: mmap: fix a fork failure with private, anonymous mappings
Rounddown incoming addr on a page boundary. Without this, we may end
up with a fork error for private, anonymous maps. The reason is, we
use VirtualAlloc in this case which will potentially overcommit if
addr is not on a page boundary. This isn't taken into account in
bookkeeping, but fixup_mmaps_after_fork will eventually stumble over
this when trying to reproduce the copy-on-write pages: VirtualQuery
returns a region reaching beyond the supposedly allocated address
range and from there it goes downhill.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Diffstat (limited to 'newlib/libc/stdlib')
0 files changed, 0 insertions, 0 deletions