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Write more tests attempting to break windows

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This time I haven't succeeded in breaking anything which is a good sign.
This commit is contained in:
Justine Tunney 2024-09-21 21:28:35 -07:00
parent 476926790a
commit 126a44dc49
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GPG key ID: BE714B4575D6E328
7 changed files with 331 additions and 37 deletions
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6
libc/calls/readwrite-nt.c
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@ -16,7 +16,6 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/calls/createfileflags.internal.h"
#include "libc/calls/internal.h"
#include "libc/calls/sig.internal.h"
@ -170,14 +169,11 @@ sys_readwrite_nt(int fd, void *data, size_t size, ssize_t offset,
}
// the i/o operation was successfully canceled
if (got_eagain) {
unassert(!got_sig);
if (got_eagain)
return eagain();
}
// it's now reasonable to report semaphore creation error
if (other_error) {
unassert(!got_sig);
errno = __dos2errno(other_error);
return -1;
}

8
libc/calls/sig.c
View file

@ -302,10 +302,10 @@ static textwindows int __sig_killer(struct PosixThread *pt, int sig, int sic) {
return 0;
}
// we can't preempt threads that masked sig or are blocked. we aso
// need to ensure we don't the target thread's stack if many signals
// need to be delivered at once. we also need to make sure two threads
// can't deadlock by killing each other at the same time.
// we can't preempt threads that masked sigs or are blocked. we also
// need to ensure we don't overflow the target thread's stack if many
// signals need to be delivered at once. we also need to make sure two
// threads can't deadlock by killing each other at the same time.
if ((atomic_load_explicit(&pt->tib->tib_sigmask, memory_order_acquire) &
(1ull << (sig - 1))) ||
atomic_exchange_explicit(&pt->pt_intoff, 1, memory_order_acquire)) {