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Rewrite special file handling on Windows

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This change gets GNU grep working. What caused it to not work, is it
wouldn't write to an output file descriptor when its dev/ino equaled
/dev/null's. So now we invent special dev/ino values for these files
This commit is contained in:
Justine Tunney 2023-10-14 01:06:00 -07:00
parent aca2261cda
commit 2db2f40a98
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
53 changed files with 485 additions and 299 deletions
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11
libc/calls/sig.c
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@ -88,11 +88,13 @@ textwindows bool __sig_ignored(int sig) {
textwindows void __sig_delete(int sig) {
struct Dll *e;
__sig.pending &= ~(1ull << (sig - 1));
BLOCK_SIGNALS;
_pthread_lock();
for (e = dll_last(_pthread_list); e; e = dll_prev(_pthread_list, e)) {
POSIXTHREAD_CONTAINER(e)->tib->tib_sigpending &= ~(1ull << (sig - 1));
}
_pthread_unlock();
ALLOW_SIGNALS;
}
static textwindows bool __sig_should_use_altstack(unsigned flags,
@ -219,7 +221,7 @@ textwindows void __sig_cancel(struct PosixThread *pt, int sig, unsigned flags) {
}
static textwindows wontreturn void __sig_tramp(struct SignalFrame *sf) {
++__sig.count;
atomic_fetch_add_explicit(&__sig.count, 1, memory_order_relaxed);
int sig = sf->si.si_signo;
sigset_t blocksigs = __sighandmask[sig];
if (!(sf->flags & SA_NODEFER)) blocksigs |= 1ull << (sig - 1);
@ -309,7 +311,9 @@ static int __sig_killer(struct PosixThread *pt, int sig, int sic) {
textwindows int __sig_kill(struct PosixThread *pt, int sig, int sic) {
int rc;
BLOCK_SIGNALS;
_pthread_ref(pt);
rc = __sig_killer(pt, sig, sic);
_pthread_unref(pt);
ALLOW_SIGNALS;
return rc;
}
@ -333,7 +337,7 @@ textwindows void __sig_generate(int sig, int sic) {
atomic_load_explicit(&pt->pt_status, memory_order_acquire) <
kPosixThreadTerminated &&
!(pt->tib->tib_sigmask & (1ull << (sig - 1)))) {
mark = pt;
_pthread_ref((mark = pt));
break;
}
}
@ -345,6 +349,7 @@ textwindows void __sig_generate(int sig, int sic) {
STRACE("all threads block %G so adding to pending signals of process", sig);
__sig.pending |= 1ull << (sig - 1);
}
_pthread_unref(mark);
ALLOW_SIGNALS;
}
@ -411,7 +416,7 @@ static void __sig_unmaskable(struct NtExceptionPointers *ep, int code, int sig,
struct CosmoTib *tib) {
// increment the signal count for getrusage()
++__sig.count;
atomic_fetch_add_explicit(&__sig.count, 1, memory_order_relaxed);
// log vital crash information reliably for --strace before doing much
// we don't print this without the flag since raw numbers scare people