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d58f4e9b7b
go/src/runtime/signal_openbsd_386.go

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all: make copyright headers consistent with one space after period This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-01 15:57:46 -07:00
// Copyright 2013 The Go Authors. All rights reserved.
[dev.cc] runtime: convert openbsd/386 port to Go LGTM=rsc R=golang-codereviews, bradfitz, rsc CC=golang-codereviews https://golang.org/cl/173200044
2014-11-14 09:55:14 -07:00
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package runtime
import "unsafe"
type sigctxt struct {
info *siginfo
ctxt unsafe.Pointer
}
runtime: record current PC for SIGPROF on non-Go thread If we get a SIGPROF on a non-Go thread, and the program has not called runtime.SetCgoTraceback so we have no way to collect a stack trace, then record a profile that is just the PC where the signal occurred. That will at least point the user to the right area. Retrieving the PC from the sigctxt in a signal handler on a non-G thread required marking a number of trivial sigctxt methods as nosplit, and, for extra safety, nowritebarrierrec. The test shows that the existing test CgoPprofThread test does not test the stack trace, just the profile signal. Leaving that for later. Change-Id: I8f8f3ff09ac099fc9d9df94b5a9d210ffc20c4ab Reviewed-on: https://go-review.googlesource.com/30252 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2016-10-04 08:11:55 -06:00
//go:nosplit
//go:nowritebarrierrec
[dev.cc] runtime: convert openbsd/386 port to Go LGTM=rsc R=golang-codereviews, bradfitz, rsc CC=golang-codereviews https://golang.org/cl/173200044
2014-11-14 09:55:14 -07:00
func (c *sigctxt) regs() *sigcontext {
return (*sigcontext)(c.ctxt)
}
runtime: record current PC for SIGPROF on non-Go thread If we get a SIGPROF on a non-Go thread, and the program has not called runtime.SetCgoTraceback so we have no way to collect a stack trace, then record a profile that is just the PC where the signal occurred. That will at least point the user to the right area. Retrieving the PC from the sigctxt in a signal handler on a non-G thread required marking a number of trivial sigctxt methods as nosplit, and, for extra safety, nowritebarrierrec. The test shows that the existing test CgoPprofThread test does not test the stack trace, just the profile signal. Leaving that for later. Change-Id: I8f8f3ff09ac099fc9d9df94b5a9d210ffc20c4ab Reviewed-on: https://go-review.googlesource.com/30252 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2016-10-04 08:11:55 -06:00
func (c *sigctxt) eax() uint32 { return c.regs().sc_eax }
func (c *sigctxt) ebx() uint32 { return c.regs().sc_ebx }
func (c *sigctxt) ecx() uint32 { return c.regs().sc_ecx }
func (c *sigctxt) edx() uint32 { return c.regs().sc_edx }
func (c *sigctxt) edi() uint32 { return c.regs().sc_edi }
func (c *sigctxt) esi() uint32 { return c.regs().sc_esi }
func (c *sigctxt) ebp() uint32 { return c.regs().sc_ebp }
func (c *sigctxt) esp() uint32 { return c.regs().sc_esp }
//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) eip() uint32 { return c.regs().sc_eip }
[dev.cc] runtime: convert openbsd/386 port to Go LGTM=rsc R=golang-codereviews, bradfitz, rsc CC=golang-codereviews https://golang.org/cl/173200044
2014-11-14 09:55:14 -07:00
func (c *sigctxt) eflags() uint32 { return c.regs().sc_eflags }
func (c *sigctxt) cs() uint32 { return c.regs().sc_cs }
func (c *sigctxt) fs() uint32 { return c.regs().sc_fs }
func (c *sigctxt) gs() uint32 { return c.regs().sc_gs }
func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
func (c *sigctxt) sigaddr() uint32 {
return *(*uint32)(add(unsafe.Pointer(c.info), 12))
}
func (c *sigctxt) set_eip(x uint32) { c.regs().sc_eip = x }
func (c *sigctxt) set_esp(x uint32) { c.regs().sc_esp = x }
func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
func (c *sigctxt) set_sigaddr(x uint32) {
*(*uint32)(add(unsafe.Pointer(c.info), 12)) = x
}
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