diff options
Diffstat (limited to 'src/runtime/sigqueue.go')
| -rw-r--r-- | src/runtime/sigqueue.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/runtime/sigqueue.go b/src/runtime/sigqueue.go index 4b97745a23..a760790396 100644 --- a/src/runtime/sigqueue.go +++ b/src/runtime/sigqueue.go @@ -154,5 +154,14 @@ func signal_disable(s uint32) { // This runs on a foreign stack, without an m or a g. No stack split. //go:nosplit func badsignal(sig uintptr) { + // Some external libraries, for example, OpenBLAS, create worker threads in + // a global constructor. If we're doing cpu profiling, and the SIGPROF signal + // comes to one of the foreign threads before we make our first cgo call, the + // call to cgocallback below will bring down the whole process. + // It's better to miss a few SIGPROF signals than to abort in this case. + // See http://golang.org/issue/9456. + if sig == _SIGPROF && needextram != 0 { + return + } cgocallback(unsafe.Pointer(funcPC(sigsend)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig)) } |