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osdep: Introduce qemu_kill_thread()

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Add a function for sending signals to individual threads. It does not make
sense on Windows, so do not provide an implementation, so that if someone
uses it by accident, they will get a linker error.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20250117001542.8290-6-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-15-alex.bennee@linaro.org>
This commit is contained in:
Ilya Leoshkevich 2025-02-07 15:31:09 +00:00 committed by Alex Bennée
parent 2b3ccf5f0d
commit a33dcfe771
2 changed files with 24 additions and 0 deletions
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9
include/qemu/osdep.h
View File

@ -631,6 +631,15 @@ bool qemu_write_pidfile(const char *pidfile, Error **errp);
int qemu_get_thread_id(void); int qemu_get_thread_id(void);
/**
* qemu_kill_thread:
* @tid: thread id.
* @sig: host signal.
*
* Send @sig to one of QEMU's own threads with identifier @tid.
*/
int qemu_kill_thread(int tid, int sig);
#ifndef CONFIG_IOVEC #ifndef CONFIG_IOVEC
struct iovec { struct iovec {
void *iov_base; void *iov_base;

15
util/oslib-posix.c
View File

@ -111,6 +111,21 @@ int qemu_get_thread_id(void)
#endif #endif
} }
int qemu_kill_thread(int tid, int sig)
{
#if defined(__linux__)
return syscall(__NR_tgkill, getpid(), tid, sig);
#elif defined(__FreeBSD__)
return thr_kill2(getpid(), tid, sig);
#elif defined(__NetBSD__)
return _lwp_kill(tid, sig);
#elif defined(__OpenBSD__)
return thrkill(tid, sig, NULL);
#else
return kill(tid, sig);
#endif
}
int qemu_daemon(int nochdir, int noclose) int qemu_daemon(int nochdir, int noclose)
{ {
return daemon(nochdir, noclose); return daemon(nochdir, noclose);