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runtime: trivial replacements of g in signal_unix.go
Change-Id: I0d8d50c8b7ae6cd01594091392dc726cf149e34a Reviewed-on: https://go-review.googlesource.com/c/go/+/418590 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Austin Clements <austin@google.com> Run-TryBot: Michael Pratt <mpratt@google.com>
This commit is contained in:
Michael Pratt
parent
399f50c9d7
commit
c647264619
@ -433,9 +433,9 @@ func sigtrampgo(sig uint32, info *siginfo, ctx unsafe.Pointer) {
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return
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}
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c := &sigctxt{info, ctx}
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g := sigFetchG(c)
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setg(g)
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if g == nil {
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gp := sigFetchG(c)
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setg(gp)
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if gp == nil {
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if sig == _SIGPROF {
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// Some platforms (Linux) have per-thread timers, which we use in
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// combination with the process-wide timer. Avoid double-counting.
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@ -462,22 +462,22 @@ func sigtrampgo(sig uint32, info *siginfo, ctx unsafe.Pointer) {
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return
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}
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setg(g.m.gsignal)
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setg(gp.m.gsignal)
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// If some non-Go code called sigaltstack, adjust.
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var gsignalStack gsignalStack
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setStack := adjustSignalStack(sig, g.m, &gsignalStack)
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setStack := adjustSignalStack(sig, gp.m, &gsignalStack)
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if setStack {
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g.m.gsignal.stktopsp = getcallersp()
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gp.m.gsignal.stktopsp = getcallersp()
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}
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if g.stackguard0 == stackFork {
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if gp.stackguard0 == stackFork {
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signalDuringFork(sig)
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}
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c.fixsigcode(sig)
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sighandler(sig, info, ctx, g)
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setg(g)
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sighandler(sig, info, ctx, gp)
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setg(gp)
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if setStack {
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restoreGsignalStack(&gsignalStack)
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}
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@ -816,34 +816,34 @@ func sighandler(sig uint32, info *siginfo, ctxt unsafe.Pointer, gp *g) {
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//
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//go:linkname sigpanic
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func sigpanic() {
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g := getg()
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gp := getg()
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if !canpanic() {
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throw("unexpected signal during runtime execution")
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}
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switch g.sig {
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switch gp.sig {
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case _SIGBUS:
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if g.sigcode0 == _BUS_ADRERR && g.sigcode1 < 0x1000 {
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if gp.sigcode0 == _BUS_ADRERR && gp.sigcode1 < 0x1000 {
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panicmem()
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}
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// Support runtime/debug.SetPanicOnFault.
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if g.paniconfault {
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panicmemAddr(g.sigcode1)
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if gp.paniconfault {
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panicmemAddr(gp.sigcode1)
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}
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print("unexpected fault address ", hex(g.sigcode1), "\n")
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print("unexpected fault address ", hex(gp.sigcode1), "\n")
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throw("fault")
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case _SIGSEGV:
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if (g.sigcode0 == 0 || g.sigcode0 == _SEGV_MAPERR || g.sigcode0 == _SEGV_ACCERR) && g.sigcode1 < 0x1000 {
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if (gp.sigcode0 == 0 || gp.sigcode0 == _SEGV_MAPERR || gp.sigcode0 == _SEGV_ACCERR) && gp.sigcode1 < 0x1000 {
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panicmem()
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}
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// Support runtime/debug.SetPanicOnFault.
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if g.paniconfault {
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panicmemAddr(g.sigcode1)
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if gp.paniconfault {
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panicmemAddr(gp.sigcode1)
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}
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print("unexpected fault address ", hex(g.sigcode1), "\n")
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print("unexpected fault address ", hex(gp.sigcode1), "\n")
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throw("fault")
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case _SIGFPE:
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switch g.sigcode0 {
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switch gp.sigcode0 {
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case _FPE_INTDIV:
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panicdivide()
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case _FPE_INTOVF:
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@ -852,11 +852,11 @@ func sigpanic() {
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panicfloat()
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}
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if g.sig >= uint32(len(sigtable)) {
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// can't happen: we looked up g.sig in sigtable to decide to call sigpanic
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if gp.sig >= uint32(len(sigtable)) {
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// can't happen: we looked up gp.sig in sigtable to decide to call sigpanic
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throw("unexpected signal value")
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}
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panic(errorString(sigtable[g.sig].name))
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panic(errorString(sigtable[gp.sig].name))
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}
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// dieFromSignal kills the program with a signal.
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@ -1117,8 +1117,8 @@ func sigfwdgo(sig uint32, info *siginfo, ctx unsafe.Pointer) bool {
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// (1) we weren't in VDSO page,
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// (2) we were in a goroutine (i.e., m.curg != nil), and
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// (3) we weren't in CGO.
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g := sigFetchG(c)
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if g != nil && g.m != nil && g.m.curg != nil && !g.m.incgo {
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gp := sigFetchG(c)
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if gp != nil && gp.m != nil && gp.m.curg != nil && !gp.m.incgo {
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return false
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}
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@ -1299,18 +1299,18 @@ type gsignalStack struct {
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//go:nosplit
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//go:nowritebarrierrec
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func setGsignalStack(st *stackt, old *gsignalStack) {
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g := getg()
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gp := getg()
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if old != nil {
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old.stack = g.m.gsignal.stack
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old.stackguard0 = g.m.gsignal.stackguard0
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old.stackguard1 = g.m.gsignal.stackguard1
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old.stktopsp = g.m.gsignal.stktopsp
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old.stack = gp.m.gsignal.stack
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old.stackguard0 = gp.m.gsignal.stackguard0
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old.stackguard1 = gp.m.gsignal.stackguard1
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old.stktopsp = gp.m.gsignal.stktopsp
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}
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stsp := uintptr(unsafe.Pointer(st.ss_sp))
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g.m.gsignal.stack.lo = stsp
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g.m.gsignal.stack.hi = stsp + st.ss_size
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g.m.gsignal.stackguard0 = stsp + _StackGuard
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g.m.gsignal.stackguard1 = stsp + _StackGuard
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gp.m.gsignal.stack.lo = stsp
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gp.m.gsignal.stack.hi = stsp + st.ss_size
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gp.m.gsignal.stackguard0 = stsp + _StackGuard
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gp.m.gsignal.stackguard1 = stsp + _StackGuard
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}
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// restoreGsignalStack restores the gsignal stack to the value it had
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@ -1342,9 +1342,9 @@ func signalstack(s *stack) {
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//go:nosplit
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//go:linkname setsigsegv
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func setsigsegv(pc uintptr) {
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g := getg()
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g.sig = _SIGSEGV
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g.sigpc = pc
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g.sigcode0 = _SEGV_MAPERR
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g.sigcode1 = 0 // TODO: emulate si_addr
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gp := getg()
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gp.sig = _SIGSEGV
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gp.sigpc = pc
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gp.sigcode0 = _SEGV_MAPERR
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gp.sigcode1 = 0 // TODO: emulate si_addr
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}
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