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util/oslib: Returns the real thread identifier on FreeBSD and NetBSD 

getpid is good enough in a mono thread context, however thr_self/_lwp_self
reflects the real current thread identifier from a given process.

Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Signed-off-by: David Carlier <devnexen@gmail.com>
This commit is contained in:
David Carlier 2020-05-26 08:25:26 +01:00 committed by Paolo Bonzini
parent ea39f9b643
commit 9548a89173
1 changed files with 9 additions and 0 deletions
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9
util/oslib-posix.c
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@ -48,11 +48,13 @@
#ifdef __FreeBSD__ #ifdef __FreeBSD__
#include <sys/sysctl.h> #include <sys/sysctl.h>
#include <sys/user.h> #include <sys/user.h>
#include <sys/thr.h>
#include <libutil.h> #include <libutil.h>
#endif #endif
#ifdef __NetBSD__ #ifdef __NetBSD__
#include <sys/sysctl.h> #include <sys/sysctl.h>
#include <lwp.h>
#endif #endif
#include "qemu/mmap-alloc.h" #include "qemu/mmap-alloc.h"
@ -84,6 +86,13 @@ int qemu_get_thread_id(void)
{ {
#if defined(__linux__) #if defined(__linux__)
return syscall(SYS_gettid); return syscall(SYS_gettid);
#elif defined(__FreeBSD__)
/* thread id is up to INT_MAX */
long tid;
thr_self(&tid);
return (int)tid;
#elif defined(__NetBSD__)
return _lwp_self();
#else #else
return getpid(); return getpid();
#endif #endif