blob: 4cd8615bcc67bfb9101e81b8097f5c71e24faeab [file] [log] [blame]
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
package runtime
func sigpanic() {
g := getg()
if !canpanic(g) {
throw("unexpected signal during runtime execution")
}
switch g.sig {
case _SIGBUS:
if g.sigcode0 == _BUS_ADRERR && g.sigcode1 < 0x1000 || g.paniconfault {
panicmem()
}
print("unexpected fault address ", hex(g.sigcode1), "\n")
throw("fault")
case _SIGSEGV:
if (g.sigcode0 == 0 || g.sigcode0 == _SEGV_MAPERR || g.sigcode0 == _SEGV_ACCERR) && g.sigcode1 < 0x1000 || g.paniconfault {
panicmem()
}
print("unexpected fault address ", hex(g.sigcode1), "\n")
throw("fault")
case _SIGFPE:
switch g.sigcode0 {
case _FPE_INTDIV:
panicdivide()
case _FPE_INTOVF:
panicoverflow()
}
panicfloat()
}
if g.sig >= uint32(len(sigtable)) {
// can't happen: we looked up g.sig in sigtable to decide to call sigpanic
throw("unexpected signal value")
}
panic(errorString(sigtable[g.sig].name))
}
// setsigsegv is used on darwin/arm{,64} to fake a segmentation fault.
//go:nosplit
func setsigsegv(pc uintptr) {
g := getg()
g.sig = _SIGSEGV
g.sigpc = pc
g.sigcode0 = _SEGV_MAPERR
g.sigcode1 = 0 // TODO: emulate si_addr
}