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runtime: better error message for newosproc failure

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If creating a new thread fails with EAGAIN, point the user at ulimit.

Fixes #15476.

Change-Id: Ib36519614b5c72776ea7f218a0c62df1dd91a8ea
Reviewed-on: https://go-review.googlesource.com/24570
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Ian Lance Taylor 2016-06-28 17:06:59 -07:00
parent 8641e6fe21
commit c7ae41e577
6 changed files with 16 additions and 0 deletions
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5
src/runtime/os_netbsd.go
View file

@ -20,6 +20,8 @@ const (
// From NetBSD's <sys/ucontext.h>
_UC_SIGMASK = 0x01
_UC_CPU = 0x04
_EAGAIN = 35
)
type mOS struct {
@ -162,6 +164,9 @@ func newosproc(mp *m, stk unsafe.Pointer) {
ret := lwp_create(unsafe.Pointer(&uc), 0, unsafe.Pointer(&mp.procid))
if ret < 0 {
print("runtime: failed to create new OS thread (have ", mcount()-1, " already; errno=", -ret, ")\n")
if ret == -_EAGAIN {
println("runtime: may need to increase max user processes (ulimit -p)")
}
throw("runtime.newosproc")
}
}