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Improve cancellations, randomness, and time

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- Exhaustively document cancellation points
- Rename SIGCANCEL to SIGTHR just like BSDs
- Further improve POSIX thread cancellations
- Ensure asynchronous cancellations work correctly
- Elevate the quality of getrandom() and getentropy()
- Make futexes cancel correctly on OpenBSD 6.x and 7.x
- Add reboot.com and shutdown.com to examples directory
- Remove underscore prefix from awesome timespec_*() APIs
- Create assertions that help verify our cancellation points
- Remove bad timespec APIs (cmp generalizes eq/ne/gt/gte/lt/lte)
This commit is contained in:
Justine Tunney 2022-11-05 19:49:41 -07:00
parent 0d7c265392
commit 3f0bcdc3ef
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GPG key ID: BE714B4575D6E328
173 changed files with 1599 additions and 782 deletions
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3
libc/calls/writev.c
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@ -17,6 +17,7 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/cp.internal.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/iovec.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
@ -52,6 +53,7 @@
*/
ssize_t writev(int fd, const struct iovec *iov, int iovlen) {
ssize_t rc;
BEGIN_CANCELLATION_POINT;
if (fd >= 0 && iovlen >= 0) {
if (IsAsan() && !__asan_is_valid_iov(iov, iovlen)) {
@ -78,6 +80,7 @@ ssize_t writev(int fd, const struct iovec *iov, int iovlen) {
rc = einval();
}
END_CANCELLATION_POINT;
STRACE("writev(%d, %s, %d) → %'ld% m", fd,
DescribeIovec(rc != -1 ? rc : -2, iov, iovlen), iovlen, rc);
return rc;