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Make more threading improvements

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- ASAN memory morgue is now lockless
- Make C11 atomics header more portable
- Rewrote pthread keys support to be lockless
- Simplify Python's unicode table unpacking code
- Make crash report write(2) closer to being atomic
- Make it possible to strace/ftrace a single thread
- ASAN now checks nul-terminated strings fast and properly
- Windows fork() now restores TLS memory of calling thread
This commit is contained in:
Justine Tunney 2022-11-01 22:36:03 -07:00
parent d7b88734cd
commit e522aa3a07
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GPG key ID: BE714B4575D6E328
189 changed files with 1363 additions and 1217 deletions
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29
libc/calls/ppoll.c
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@ -16,15 +16,14 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/struct/sigset.internal.h"
#include "libc/calls/struct/timespec.h"
#include "libc/calls/struct/timespec.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/asan.internal.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/strace.internal.h"
#include "libc/macros.internal.h"
#include "libc/sock/struct/pollfd.h"
#include "libc/sock/struct/pollfd.internal.h"
#include "libc/sysv/consts/sig.h"
@ -58,7 +57,7 @@
int ppoll(struct pollfd *fds, size_t nfds, const struct timespec *timeout,
const sigset_t *sigmask) {
size_t n;
int e, i, rc;
int e, rc;
uint64_t millis;
sigset_t oldmask;
struct timespec ts, *tsp;
@ -96,25 +95,7 @@ int ppoll(struct pollfd *fds, size_t nfds, const struct timespec *timeout,
rc = sys_poll_nt(fds, nfds, &millis, sigmask);
}
#if defined(SYSDEBUG) && _POLLTRACE
if (UNLIKELY(__strace > 0)) {
kprintf(STRACE_PROLOGUE "ppoll(");
if ((!IsAsan() && kisdangerous(fds)) ||
(IsAsan() && !__asan_is_valid(fds, nfds * sizeof(struct pollfd)))) {
kprintf("%p", fds);
} else {
kprintf("[{");
for (i = 0; i < MIN(5, nfds); ++i) {
kprintf("%s{%d, %s, %s}", i ? ", " : "", fds[i].fd,
DescribePollFlags(fds[i].events),
DescribePollFlags(fds[i].revents));
}
kprintf("%s}]", i == 5 ? "..." : "");
}
kprintf(", %'zu, %s, %s) → %d% lm\n", nfds, DescribeTimeval(0, timeout),
DescribeSigset(0, sigmask), rc);
}
#endif
STRACE("ppoll(%s, %'zu, %s, %s) → %d% lm\n", DescribePollFds(rc, fds, nfds),
nfds, DescribeTimespec(0, timeout), DescribeSigset(0, sigmask), rc);
return rc;
}