diff options
Diffstat (limited to 'libgo/go')
| -rw-r--r-- | libgo/go/runtime/os_linux.go | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/libgo/go/runtime/os_linux.go b/libgo/go/runtime/os_linux.go index 96fb178..2b2d827 100644 --- a/libgo/go/runtime/os_linux.go +++ b/libgo/go/runtime/os_linux.go @@ -22,6 +22,12 @@ type mOS struct { profileTimerValid uint32 } +// setSigeventTID is written in C to set the sigev_notify_thread_id +// field of a sigevent struct. +// +//go:noescape +func setSigeventTID(*_sigevent, int32) + func getProcID() uint64 { return uint64(gettid()) } @@ -52,9 +58,12 @@ const ( ) // Atomically, +// // if(*addr == val) sleep +// // Might be woken up spuriously; that's allowed. // Don't sleep longer than ns; ns < 0 means forever. +// //go:nosplit func futexsleep(addr *uint32, val uint32, ns int64) { // Some Linux kernels have a bug where futex of @@ -73,6 +82,7 @@ func futexsleep(addr *uint32, val uint32, ns int64) { } // If any procs are sleeping on addr, wake up at most cnt. +// //go:nosplit func futexwakeup(addr *uint32, cnt uint32) { ret := futex(unsafe.Pointer(addr), _FUTEX_WAKE_PRIVATE, cnt, nil, nil, 0) @@ -365,7 +375,7 @@ func setThreadCPUProfiler(hz int32) { var sevp _sigevent sevp.sigev_notify = _SIGEV_THREAD_ID sevp.sigev_signo = _SIGPROF - *((*int32)(unsafe.Pointer(&sevp._sigev_un))) = int32(mp.procid) + setSigeventTID(&sevp, int32(mp.procid)) ret := timer_create(_CLOCK_THREAD_CPUTIME_ID, &sevp, &timerid) if ret != 0 { // If we cannot create a timer for this M, leave profileTimerValid false |