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d145456b16
Plan 9 trap/signal handling differs on ARM from other architectures because ARM has a link register. Also trap message syntax varies between different architectures (historical accident?). Revised 7 March to clarify a comment. Change-Id: Ib6485f82857a2f9a0d6b2c375cf0aaa230b83656 Reviewed-on: https://go-review.googlesource.com/18969 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
58 lines
1.9 KiB
Go
58 lines
1.9 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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type sigTabT struct {
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flags int
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name string
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}
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// Incoming notes are compared against this table using strncmp, so the
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// order matters: longer patterns must appear before their prefixes.
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// There are _SIG constants in os2_plan9.go for the table index of some
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// of these.
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//
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// If you add entries to this table, you must respect the prefix ordering
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// and also update the constant values is os2_plan9.go.
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var sigtable = [...]sigTabT{
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// Traps that we cannot be recovered.
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{_SigThrow, "sys: trap: debug exception"},
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{_SigThrow, "sys: trap: invalid opcode"},
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// We can recover from some memory errors in runtime·sigpanic.
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{_SigPanic, "sys: trap: fault read"}, // SIGRFAULT
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{_SigPanic, "sys: trap: fault write"}, // SIGWFAULT
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// We can also recover from math errors.
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{_SigPanic, "sys: trap: divide error"}, // SIGINTDIV
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{_SigPanic, "sys: fp:"}, // SIGFLOAT
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// All other traps are normally handled as if they were marked SigThrow.
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// We mark them SigPanic here so that debug.SetPanicOnFault will work.
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{_SigPanic, "sys: trap:"}, // SIGTRAP
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// Writes to a closed pipe can be handled if desired, otherwise they're ignored.
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{_SigNotify, "sys: write on closed pipe"},
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// Other system notes are more serious and cannot be recovered.
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{_SigThrow, "sys:"},
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// Issued to all other procs when calling runtime·exit.
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{_SigGoExit, "go: exit "},
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// Kill is sent by external programs to cause an exit.
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{_SigKill, "kill"},
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// Interrupts can be handled if desired, otherwise they cause an exit.
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{_SigNotify + _SigKill, "interrupt"},
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{_SigNotify + _SigKill, "hangup"},
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// Alarms can be handled if desired, otherwise they're ignored.
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{_SigNotify, "alarm"},
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// Aborts can be handled if desired, otherwise they cause a stack trace.
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{_SigNotify + _SigThrow, "abort"},
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}
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