diff options
| author | Corinna Vinschen <corinna@vinschen.de> | 2019-02-26 12:19:08 +0300 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2019-02-26 12:19:08 +0300 |
| commit | 5a483b6bcac263102df890c3172ecddf23fc9f53 (patch) | |
| tree | b7f55c29948c02b1ad04f74eeae41f28fa7ed50a | |
| parent | 3b3ba558e90e7ce07eb0b9a5939453d4b90bd5e5 (diff) | |
Cygwin: timerfd: reduce size of shared mem region to a single page
The share section was created using the PAGE_SIZE constant,
but PAGE_SIZE is 64K. Fix that by using wincap.page_size()
instead, which returns the desired actual page size of 4K.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
| -rw-r--r-- | winsup/cygwin/timerfd.cc | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/winsup/cygwin/timerfd.cc b/winsup/cygwin/timerfd.cc index 418e71bf2..b0d4db9de 100644 --- a/winsup/cygwin/timerfd.cc +++ b/winsup/cygwin/timerfd.cc @@ -210,8 +210,8 @@ timerfd_tracker::create (clockid_t clock_id) const ACCESS_MASK access = STANDARD_RIGHTS_REQUIRED | SECTION_MAP_READ | SECTION_MAP_WRITE; - SIZE_T vsize = PAGE_SIZE; - LARGE_INTEGER sectionsize = { QuadPart: PAGE_SIZE }; + SIZE_T vsize = wincap.page_size (); + LARGE_INTEGER sectionsize = { QuadPart: (LONGLONG) wincap.page_size () }; /* Valid clock? */ if (!get_clock (clock_id)) @@ -290,7 +290,7 @@ timerfd_tracker::create (clockid_t clock_id) /* Create section mapping (has to be recreated after fork/exec) */ tfd_shared = NULL; status = NtMapViewOfSection (tfd_shared_hdl, NtCurrentProcess (), - (void **) &tfd_shared, 0, PAGE_SIZE, NULL, + (void **) &tfd_shared, 0, vsize, NULL, &vsize, ViewShare, 0, PAGE_READWRITE); if (!NT_SUCCESS (status)) { @@ -397,7 +397,7 @@ timerfd_tracker::fixup_after_fork_exec (bool execing) { NTSTATUS status; OBJECT_ATTRIBUTES attr; - SIZE_T vsize = PAGE_SIZE; + SIZE_T vsize = wincap.page_size (); /* Run this only once per process */ if (winpid == GetCurrentProcessId ()) @@ -405,7 +405,7 @@ timerfd_tracker::fixup_after_fork_exec (bool execing) /* Recreate shared section mapping */ tfd_shared = NULL; status = NtMapViewOfSection (tfd_shared_hdl, NtCurrentProcess (), - (PVOID *) &tfd_shared, 0, PAGE_SIZE, NULL, + (PVOID *) &tfd_shared, 0, vsize, NULL, &vsize, ViewShare, 0, PAGE_READWRITE); if (!NT_SUCCESS (status)) api_fatal ("Can't recreate shared timerfd section during %s, status %y!", |