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Improve locks and signals

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- Introduce fast spinlock API
- Double rand64() perf w/ spinlock
- Improve raise() on New Technology
- Support gettid() across platforms
- Implement SA_NODEFER on New Technology
- Move the lock intrinsics into LIBC_INTRIN
- Make SIGTRAP recoverable on New Technology
- Block SIGCHLD in wait4() on New Technology
- Add threading prototypes for XNU and FreeBSD
- Rewrite abort() fixing its minor bugs on XNU/NT
- Shave down a lot of the content in libc/bits/bits.h
- Let signal handlers modify CPU registers on New Technology
This commit is contained in:
Justine Tunney 2022-04-12 05:20:17 -07:00
parent f68f1789bd
commit 046c7ebd4a
110 changed files with 1514 additions and 876 deletions
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28
libc/calls/raise.c
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@ -17,16 +17,25 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/getconsolectrlevent.h"
#include "libc/calls/getconsolectrlevent.internal.h"
#include "libc/calls/internal.h"
#include "libc/calls/sig.internal.h"
#include "libc/calls/strace.internal.h"
#include "libc/intrin/kprintf.h"
#include "libc/nt/console.h"
#include "libc/nt/process.h"
#include "libc/nt/runtime.h"
#include "libc/nt/synchronization.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/sicode.h"
#include "libc/sysv/consts/sig.h"
static textwindows inline bool HasWorkingConsole(void) {
return !!(__ntconsolemode[0] | __ntconsolemode[1] | __ntconsolemode[2]);
}
/**
* Sends signal to this process.
*
@ -36,7 +45,7 @@
*/
int raise(int sig) {
int rc, event;
STRACE("raise(%d) → [...]", sig);
STRACE("raise(%s) → [...]", strsignal(sig));
if (sig == SIGTRAP) {
DebugBreak();
rc = 0;
@ -45,18 +54,27 @@ int raise(int sig) {
x = 1 / x;
rc = 0;
} else if (!IsWindows()) {
// XXX: should be tkill() or tgkill() on linux
rc = sys_kill(getpid(), sig, 1);
} else {
if ((event = GetConsoleCtrlEvent(sig)) != -1) {
if (HasWorkingConsole() && (event = GetConsoleCtrlEvent(sig)) != -1) {
// XXX: MSDN says "If this parameter is zero, the signal is
// generated in all processes that share the console of the
// calling process." which seems to imply multiple process
// groups potentially. We just shouldn't use this because it
// doesn't make any sense and it's so evil.
if (GenerateConsoleCtrlEvent(event, 0)) {
// XXX: we shouldn't need to sleep here ctrl-c is evil on nt
SleepEx(100, false);
__sig_check(false);
rc = 0;
} else {
rc = __winerr();
}
} else {
rc = __sig_add(sig, SI_USER);
rc = __sig_raise(sig, SI_USER);
}
}
STRACE("[...] raise → %d% m", rc);
STRACE("[...] raise(%s) → %d% m", strsignal(sig), rc);
return rc;
}