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Introduce interprocess signaling on Windows

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This change gets rsync working without any warning or errors. On Windows
we now create a bunch of C:\var\sig\x\y.pid shared memory files, so sigs
can be delivered between processes. WinMain() creates this file when the
process starts. If the program links signaling system calls then we make
a thread at startup too, which allows asynchronous delivery each quantum
and cancelation points can spot these signals potentially faster on wait

See #1240
This commit is contained in:
Justine Tunney 2024-09-19 03:02:13 -07:00
parent 8527462b95
commit 0d74673213
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GPG key ID: BE714B4575D6E328
22 changed files with 302 additions and 62 deletions
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4
test/libc/calls/sigsuspend_test.c
View file

@ -76,10 +76,6 @@ TEST(sigsuspend, testSignalQueuingSelf) {
}
TEST(sigsuspend, testSignalQueuingIpc) {
if (IsWindows()) {
// xxx: probably need a signal server to do this kind of signalling
return;
}
int pid, ws;
sigset_t neu, old, bits;
struct sigaction oldusr1, oldusr2;

2
test/libc/proc/fork_test.c
View file

@ -103,8 +103,6 @@ static void OnSigusr2(int sig) {
}
TEST(fork, childToChild) {
if (IsWindows())
return; // :'(
sigset_t mask, oldmask;
int ws, parent, child1, child2;
gotsigusr1 = false;

4
test/libc/proc/handkill_test.c
View file

@ -125,8 +125,6 @@ TEST(handkill, thread2thread_async) {
}
TEST(handkill, process_async) {
if (IsWindows())
return;
SPAWN(fork);
shm->ready = true;
while (!shm->got_signal)
@ -142,8 +140,6 @@ TEST(handkill, process_async) {
}
TEST(handkill, process_pause) {
if (IsWindows())
return;
SPAWN(fork);
shm->ready = true;
pause();

2
test/libc/proc/posix_spawn_test.c
View file

@ -262,8 +262,6 @@ void EmptySigHandler(int sig) {
}
TEST(posix_spawn, etxtbsy) {
if (IsWindows())
return; // can't deliver signals between processes
if (IsXnu())
return; // they don't appear impacted by this race condition
if (IsNetbsd())

5
test/libc/proc/system_test.c
View file

@ -166,13 +166,12 @@ TEST(system, notequals) {
}
TEST(system, usleep) {
ASSERT_EQ(0, GETEXITSTATUS(system("usleep & kill $!")));
ASSERT_EQ(0, GETEXITSTATUS(system("usleep & kill $!; wait")));
}
TEST(system, kill) {
int ws = system("kill -TERM $$; usleep");
if (!IsWindows())
ASSERT_EQ(SIGTERM, WTERMSIG(ws));
ASSERT_EQ(SIGTERM, WTERMSIG(ws));
}
TEST(system, exitStatusPreservedAfterSemiColon) {

2
test/libc/stdio/popen_test.c
View file

@ -120,8 +120,6 @@ void OnSig(int sig) {
}
TEST(popen, complicated) {
if (IsWindows())
return; // windows treats sigusr1 as terminate
char cmd[64];
signal(SIGUSR1, OnSig);
sprintf(cmd, "read a ; test \"x$a\" = xhello && kill -USR1 %d", getpid());