Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

runtime: log all thread stack traces during GODEBUG=crash on Unix

Browse source 
This extends https://golang.org/cl/2811, which only applied to Darwin
and GNU/Linux, to all Unix systems.

Fixes #9591.

Change-Id: Iec3fb438564ba2924b15b447c0480f87c0bfd009
Reviewed-on: https://go-review.googlesource.com/12661
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Ian Lance Taylor 2015-07-24 16:16:39 -07:00
parent a2cf0568e8
commit f0876a1a94
19 changed files with 380 additions and 51 deletions
Download patch file Download diff file Expand all files Collapse all files

35
src/runtime/signal_arm.go
View file

@ -32,6 +32,8 @@ func dumpregs(c *sigctxt) {
print("fault ", hex(c.fault()), "\n")
}
var crashing int32
// May run during STW, so write barriers are not allowed.
//go:nowritebarrier
func sighandler(sig uint32, info *siginfo, ctxt unsafe.Pointer, gp *g) {
@ -106,7 +108,10 @@ func sighandler(sig uint32, info *siginfo, ctxt unsafe.Pointer, gp *g) {
_g_.m.throwing = 1
_g_.m.caughtsig.set(gp)
startpanic()
if crashing == 0 {
startpanic()
}
if sig < uint32(len(sigtable)) {
print(sigtable[sig].name, "\n")
@ -114,7 +119,7 @@ func sighandler(sig uint32, info *siginfo, ctxt unsafe.Pointer, gp *g) {
print("Signal ", sig, "\n")
}
print("PC=", hex(c.pc()), "\n")
print("PC=", hex(c.pc()), " m=", _g_.m.id, "\n")
if _g_.m.lockedg != nil && _g_.m.ncgo > 0 && gp == _g_.m.g0 {
print("signal arrived during cgo execution\n")
gp = _g_.m.lockedg
@ -125,12 +130,34 @@ func sighandler(sig uint32, info *siginfo, ctxt unsafe.Pointer, gp *g) {
if gotraceback(&docrash) > 0 {
goroutineheader(gp)
tracebacktrap(uintptr(c.pc()), uintptr(c.sp()), uintptr(c.lr()), gp)
tracebackothers(gp)
print("\n")
if crashing > 0 && gp != _g_.m.curg && _g_.m.curg != nil && readgstatus(_g_.m.curg)&^_Gscan == _Grunning {
// tracebackothers on original m skipped this one; trace it now.
goroutineheader(_g_.m.curg)
traceback(^uintptr(0), ^uintptr(0), 0, gp)
} else if crashing == 0 {
tracebackothers(gp)
print("\n")
}
dumpregs(c)
}
if docrash {
crashing++
if crashing < sched.mcount {
// There are other m's that need to dump their stacks.
// Relay SIGQUIT to the next m by sending it to the current process.
// All m's that have already received SIGQUIT have signal masks blocking
// receipt of any signals, so the SIGQUIT will go to an m that hasn't seen it yet.
// When the last m receives the SIGQUIT, it will fall through to the call to
// crash below. Just in case the relaying gets botched, each m involved in
// the relay sleeps for 5 seconds and then does the crash/exit itself.
// In expected operation, the last m has received the SIGQUIT and run
// crash/exit and the process is gone, all long before any of the
// 5-second sleeps have finished.
print("\n-----\n\n")
raiseproc(_SIGQUIT)
usleep(5 * 1000 * 1000)
}
crash()
}