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runtime: Permit default behaviour of SIGTSTP, SIGTTIN, SIGTTOU.

Browse Source 
Fixes #3037.

R=rsc, minux.ma, r, rsc
CC=golang-dev
https://golang.org/cl/5674072
This commit is contained in:
David Symonds 2012-02-17 14:36:40 +11:00
parent efb28b2ac1
commit 3d8ebefbbe
11 changed files with 67 additions and 20 deletions
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2
src/pkg/runtime/runtime.h
View File

@ -271,6 +271,7 @@ enum
SigKill = 1<<1, // if signal.Notify doesn't take it, exit quietly
SigThrow = 1<<2, // if signal.Notify doesn't take it, exit loudly
SigPanic = 1<<3, // if the signal is from the kernel, panic
SigDefault = 1<<4, // if the signal isn't explicitly requested, don't monitor it
};
// NOTE(rsc): keep in sync with extern.go:/type.Func.
@ -501,6 +502,7 @@ Slice runtime·gobytes(byte*, int32);
String runtime·gostringnocopy(byte*);
String runtime·gostringw(uint16*);
void runtime·initsig(void);
void runtime·sigenable(uint32 sig);
int32 runtime·gotraceback(void);
void runtime·goroutineheader(G*);
void runtime·traceback(uint8 *pc, uint8 *sp, uint8 *lr, G* gp);

5
src/pkg/runtime/signal_plan9_386.c
View File

@ -10,6 +10,11 @@ runtime·signame(int32)
return runtime·emptystring;
}
void
runtime·sigenable(uint32 sig)
{
}
void
runtime·resetcpuprofiler(int32 hz)
{

22
src/pkg/runtime/signal_unix.c
View File

@ -27,9 +27,27 @@ runtime·initsig(void)
// First call: basic setup.
for(i = 0; i<NSIG; i++) {
t = &runtime·sigtab[i];
if(t->flags == 0)
if((t->flags == 0) || (t->flags & SigDefault))
continue;
runtime·setsig(i, runtime·sighandler, 1);
runtime·setsig(i, runtime·sighandler, true);
}
}
void
runtime·sigenable(uint32 sig)
{
int32 i;
SigTab *t;
for(i = 0; i<NSIG; i++) {
// ~0 means all signals.
if(~sig == 0 || i == sig) {
t = &runtime·sigtab[i];
if(t->flags & SigDefault) {
runtime·setsig(i, runtime·sighandler, true);
t->flags &= ~SigDefault; // make this idempotent
}
}
}
}

5
src/pkg/runtime/signal_windows_386.c
View File

@ -80,6 +80,11 @@ runtime·sighandler(ExceptionRecord *info, Context *r, G *gp)
return 0;
}
void
runtime·sigenable(uint32 sig)
{
}
void
runtime·dosigprof(Context *r, G *gp)
{

5
src/pkg/runtime/signal_windows_amd64.c
View File

@ -87,6 +87,11 @@ runtime·sighandler(ExceptionRecord *info, Context *r, G *gp)
return 0;
}
void
runtime·sigenable(uint32 sig)
{
}
void
runtime·dosigprof(Context *r, G *gp)
{

8
src/pkg/runtime/signals_darwin.h
View File

@ -6,6 +6,7 @@
#define K SigKill
#define T SigThrow
#define P SigPanic
#define D SigDefault
SigTab runtime·sigtab[] = {
/* 0 */ 0, "SIGNONE: no trap",
@ -26,11 +27,11 @@ SigTab runtime·sigtab[] = {
/* 15 */ N+K, "SIGTERM: termination",
/* 16 */ N, "SIGURG: urgent condition on socket",
/* 17 */ 0, "SIGSTOP: stop",
/* 18 */ N, "SIGTSTP: keyboard stop",
/* 18 */ N+D, "SIGTSTP: keyboard stop",
/* 19 */ 0, "SIGCONT: continue after stop",
/* 20 */ N, "SIGCHLD: child status has changed",
/* 21 */ N, "SIGTTIN: background read from tty",
/* 22 */ N, "SIGTTOU: background write to tty",
/* 21 */ N+D, "SIGTTIN: background read from tty",
/* 22 */ N+D, "SIGTTOU: background write to tty",
/* 23 */ N, "SIGIO: i/o now possible",
/* 24 */ N, "SIGXCPU: cpu limit exceeded",
/* 25 */ N, "SIGXFSZ: file size limit exceeded",
@ -46,3 +47,4 @@ SigTab runtime·sigtab[] = {
#undef K
#undef T
#undef P
#undef D

8
src/pkg/runtime/signals_freebsd.h
View File

@ -6,6 +6,7 @@
#define K SigKill
#define T SigThrow
#define P SigPanic
#define D SigDefault
SigTab runtime·sigtab[] = {
/* 0 */ 0, "SIGNONE: no trap",
@ -26,11 +27,11 @@ SigTab runtime·sigtab[] = {
/* 15 */ N+K, "SIGTERM: termination",
/* 16 */ N, "SIGURG: urgent condition on socket",
/* 17 */ 0, "SIGSTOP: stop",
/* 18 */ N, "SIGTSTP: keyboard stop",
/* 18 */ N+D, "SIGTSTP: keyboard stop",
/* 19 */ 0, "SIGCONT: continue after stop",
/* 20 */ N, "SIGCHLD: child status has changed",
/* 21 */ N, "SIGTTIN: background read from tty",
/* 22 */ N, "SIGTTOU: background write to tty",
/* 21 */ N+D, "SIGTTIN: background read from tty",
/* 22 */ N+D, "SIGTTOU: background write to tty",
/* 23 */ N, "SIGIO: i/o now possible",
/* 24 */ N, "SIGXCPU: cpu limit exceeded",
/* 25 */ N, "SIGXFSZ: file size limit exceeded",
@ -47,3 +48,4 @@ SigTab runtime·sigtab[] = {
#undef K
#undef T
#undef P
#undef D

8
src/pkg/runtime/signals_linux.h
View File

@ -6,6 +6,7 @@
#define K SigKill
#define T SigThrow
#define P SigPanic
#define D SigDefault
SigTab runtime·sigtab[] = {
/* 0 */ 0, "SIGNONE: no trap",
@ -28,9 +29,9 @@ SigTab runtime·sigtab[] = {
/* 17 */ N, "SIGCHLD: child status has changed",
/* 18 */ 0, "SIGCONT: continue",
/* 19 */ 0, "SIGSTOP: stop, unblockable",
/* 20 */ N, "SIGTSTP: keyboard stop",
/* 21 */ N, "SIGTTIN: background read from tty",
/* 22 */ N, "SIGTTOU: background write to tty",
/* 20 */ N+D, "SIGTSTP: keyboard stop",
/* 21 */ N+D, "SIGTTIN: background read from tty",
/* 22 */ N+D, "SIGTTOU: background write to tty",
/* 23 */ N, "SIGURG: urgent condition on socket",
/* 24 */ N, "SIGXCPU: cpu limit exceeded",
/* 25 */ N, "SIGXFSZ: file size limit exceeded",
@ -79,3 +80,4 @@ SigTab runtime·sigtab[] = {
#undef K
#undef T
#undef P
#undef D

8
src/pkg/runtime/signals_netbsd.h
View File

@ -6,6 +6,7 @@
#define K SigKill
#define T SigThrow
#define P SigPanic
#define D SigDefault
SigTab runtime·sigtab[] = {
/* 0 */ 0, "SIGNONE: no trap",
@ -26,11 +27,11 @@ SigTab runtime·sigtab[] = {
/* 15 */ N+K, "SIGTERM: termination",
/* 16 */ N, "SIGURG: urgent condition on socket",
/* 17 */ 0, "SIGSTOP: stop",
/* 18 */ N, "SIGTSTP: keyboard stop",
/* 18 */ N+D, "SIGTSTP: keyboard stop",
/* 19 */ 0, "SIGCONT: continue after stop",
/* 20 */ N, "SIGCHLD: child status has changed",
/* 21 */ N, "SIGTTIN: background read from tty",
/* 22 */ N, "SIGTTOU: background write to tty",
/* 21 */ N+D, "SIGTTIN: background read from tty",
/* 22 */ N+D, "SIGTTOU: background write to tty",
/* 23 */ N, "SIGIO: i/o now possible",
/* 24 */ N, "SIGXCPU: cpu limit exceeded",
/* 25 */ N, "SIGXFSZ: file size limit exceeded",
@ -47,3 +48,4 @@ SigTab runtime·sigtab[] = {
#undef K
#undef T
#undef P
#undef D

8
src/pkg/runtime/signals_openbsd.h
View File

@ -6,6 +6,7 @@
#define K SigKill
#define T SigThrow
#define P SigPanic
#define D SigDefault
SigTab runtime·sigtab[] = {
/* 0 */ 0, "SIGNONE: no trap",
@ -26,11 +27,11 @@ SigTab runtime·sigtab[] = {
/* 15 */ N+K, "SIGTERM: termination",
/* 16 */ N, "SIGURG: urgent condition on socket",
/* 17 */ 0, "SIGSTOP: stop",
/* 18 */ N, "SIGTSTP: keyboard stop",
/* 18 */ N+D, "SIGTSTP: keyboard stop",
/* 19 */ 0, "SIGCONT: continue after stop",
/* 20 */ N, "SIGCHLD: child status has changed",
/* 21 */ N, "SIGTTIN: background read from tty",
/* 22 */ N, "SIGTTOU: background write to tty",
/* 21 */ N+D, "SIGTTIN: background read from tty",
/* 22 */ N+D, "SIGTTOU: background write to tty",
/* 23 */ N, "SIGIO: i/o now possible",
/* 24 */ N, "SIGXCPU: cpu limit exceeded",
/* 25 */ N, "SIGXFSZ: file size limit exceeded",
@ -47,3 +48,4 @@ SigTab runtime·sigtab[] = {
#undef K
#undef T
#undef P
#undef D

2
src/pkg/runtime/sigqueue.goc
View File

@ -140,10 +140,12 @@ func signal_enable(s uint32) {
// Special case: want everything.
for(i=0; i<nelem(sig.wanted); i++)
sig.wanted[i] = ~(uint32)0;
runtime·sigenable(s);
return;
}
if(s >= nelem(sig.wanted)*32)
return;
sig.wanted[s/32] |= 1U<<(s&31);
runtime·sigenable(s);
}