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-rw-r--r--gcc-4.8.1/libgo/runtime/go-signal.c485
1 files changed, 0 insertions, 485 deletions
diff --git a/gcc-4.8.1/libgo/runtime/go-signal.c b/gcc-4.8.1/libgo/runtime/go-signal.c
deleted file mode 100644
index 1965e0588..000000000
--- a/gcc-4.8.1/libgo/runtime/go-signal.c
+++ /dev/null
@@ -1,485 +0,0 @@
-/* go-signal.c -- signal handling for Go.
-
- Copyright 2009 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. */
-
-#include <signal.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/time.h>
-
-#include "runtime.h"
-#include "go-assert.h"
-#include "go-panic.h"
-
-#ifndef SA_RESTART
- #define SA_RESTART 0
-#endif
-
-#ifdef USING_SPLIT_STACK
-
-extern void __splitstack_getcontext(void *context[10]);
-
-extern void __splitstack_setcontext(void *context[10]);
-
-#endif
-
-#define N SigNotify
-#define K SigKill
-#define T SigThrow
-#define P SigPanic
-#define D SigDefault
-
-/* Signal actions. This collects the sigtab tables for several
- different targets from the master library. SIGKILL, SIGCONT, and
- SIGSTOP are not listed, as we don't want to set signal handlers for
- them. */
-
-SigTab runtime_sigtab[] = {
-#ifdef SIGHUP
- { SIGHUP, N + K },
-#endif
-#ifdef SIGINT
- { SIGINT, N + K },
-#endif
-#ifdef SIGQUIT
- { SIGQUIT, N + T },
-#endif
-#ifdef SIGILL
- { SIGILL, T },
-#endif
-#ifdef SIGTRAP
- { SIGTRAP, T },
-#endif
-#ifdef SIGABRT
- { SIGABRT, N + T },
-#endif
-#ifdef SIGBUS
- { SIGBUS, P },
-#endif
-#ifdef SIGFPE
- { SIGFPE, P },
-#endif
-#ifdef SIGUSR1
- { SIGUSR1, N },
-#endif
-#ifdef SIGSEGV
- { SIGSEGV, P },
-#endif
-#ifdef SIGUSR2
- { SIGUSR2, N },
-#endif
-#ifdef SIGPIPE
- { SIGPIPE, N },
-#endif
-#ifdef SIGALRM
- { SIGALRM, N },
-#endif
-#ifdef SIGTERM
- { SIGTERM, N + K },
-#endif
-#ifdef SIGSTKFLT
- { SIGSTKFLT, T },
-#endif
-#ifdef SIGCHLD
- { SIGCHLD, N },
-#endif
-#ifdef SIGTSTP
- { SIGTSTP, N + D },
-#endif
-#ifdef SIGTTIN
- { SIGTTIN, N + D },
-#endif
-#ifdef SIGTTOU
- { SIGTTOU, N + D },
-#endif
-#ifdef SIGURG
- { SIGURG, N },
-#endif
-#ifdef SIGXCPU
- { SIGXCPU, N },
-#endif
-#ifdef SIGXFSZ
- { SIGXFSZ, N },
-#endif
-#ifdef SIGVTALRM
- { SIGVTALRM, N },
-#endif
-#ifdef SIGPROF
- { SIGPROF, N },
-#endif
-#ifdef SIGWINCH
- { SIGWINCH, N },
-#endif
-#ifdef SIGIO
- { SIGIO, N },
-#endif
-#ifdef SIGPWR
- { SIGPWR, N },
-#endif
-#ifdef SIGSYS
- { SIGSYS, N },
-#endif
-#ifdef SIGEMT
- { SIGEMT, T },
-#endif
-#ifdef SIGINFO
- { SIGINFO, N },
-#endif
-#ifdef SIGTHR
- { SIGTHR, N },
-#endif
- { -1, 0 }
-};
-#undef N
-#undef K
-#undef T
-#undef P
-#undef D
-
-
-static int8 badsignal[] = "runtime: signal received on thread not created by Go.\n";
-
-static void
-runtime_badsignal(int32 sig)
-{
- // Avoid -D_FORTIFY_SOURCE problems.
- int rv __attribute__((unused));
-
- if (sig == SIGPROF) {
- return; // Ignore SIGPROFs intended for a non-Go thread.
- }
- rv = runtime_write(2, badsignal, sizeof badsignal - 1);
- runtime_exit(1);
-}
-
-/* Handle a signal, for cases where we don't panic. We can split the
- stack here. */
-
-static void
-sig_handler (int sig)
-{
- int i;
-
- if (runtime_m () == NULL)
- {
- runtime_badsignal (sig);
- return;
- }
-
-#ifdef SIGPROF
- if (sig == SIGPROF)
- {
- runtime_sigprof ();
- return;
- }
-#endif
-
- for (i = 0; runtime_sigtab[i].sig != -1; ++i)
- {
- SigTab *t;
-
- t = &runtime_sigtab[i];
-
- if (t->sig != sig)
- continue;
-
- if ((t->flags & SigNotify) != 0)
- {
- if (__go_sigsend (sig))
- return;
- }
- if ((t->flags & SigKill) != 0)
- runtime_exit (2);
- if ((t->flags & SigThrow) == 0)
- return;
-
- runtime_startpanic ();
-
- {
- const char *name = NULL;
-
-#ifdef HAVE_STRSIGNAL
- name = strsignal (sig);
-#endif
-
- if (name == NULL)
- runtime_printf ("Signal %d\n", sig);
- else
- runtime_printf ("%s\n", name);
- }
-
- runtime_printf ("\n");
-
- if (runtime_gotraceback ())
- {
- G *g;
-
- g = runtime_g ();
- runtime_traceback (g);
- runtime_tracebackothers (g);
-
- /* The gc library calls runtime_dumpregs here, and provides
- a function that prints the registers saved in context in
- a readable form. */
- }
-
- runtime_exit (2);
- }
-
- __builtin_unreachable ();
-}
-
-/* The start of handling a signal which panics. */
-
-static void
-sig_panic_leadin (int sig)
-{
- int i;
- sigset_t clear;
-
- if (runtime_m ()->mallocing)
- {
- runtime_printf ("caught signal while mallocing: %d\n", sig);
- runtime_throw ("caught signal while mallocing");
- }
-
- /* The signal handler blocked signals; unblock them. */
- i = sigfillset (&clear);
- __go_assert (i == 0);
- i = sigprocmask (SIG_UNBLOCK, &clear, NULL);
- __go_assert (i == 0);
-}
-
-#ifdef SA_SIGINFO
-
-/* Signal dispatch for signals which panic, on systems which support
- SA_SIGINFO. This is called on the thread stack, and as such it is
- permitted to split the stack. */
-
-static void
-sig_panic_info_handler (int sig, siginfo_t *info,
- void *context __attribute__ ((unused)))
-{
- G *g;
-
- g = runtime_g ();
- if (g == NULL || info->si_code == SI_USER)
- {
- sig_handler (sig);
- return;
- }
-
- g->sig = sig;
- g->sigcode0 = info->si_code;
- g->sigcode1 = (uintptr_t) info->si_addr;
-
- /* It would be nice to set g->sigpc here as the gc library does, but
- I don't know how to get it portably. */
-
- sig_panic_leadin (sig);
-
- switch (sig)
- {
-#ifdef SIGBUS
- case SIGBUS:
- if (info->si_code == BUS_ADRERR && (uintptr_t) info->si_addr < 0x1000)
- runtime_panicstring ("invalid memory address or "
- "nil pointer dereference");
- runtime_printf ("unexpected fault address %p\n", info->si_addr);
- runtime_throw ("fault");
-#endif
-
-#ifdef SIGSEGV
- case SIGSEGV:
- if ((info->si_code == 0
- || info->si_code == SEGV_MAPERR
- || info->si_code == SEGV_ACCERR)
- && (uintptr_t) info->si_addr < 0x1000)
- runtime_panicstring ("invalid memory address or "
- "nil pointer dereference");
- runtime_printf ("unexpected fault address %p\n", info->si_addr);
- runtime_throw ("fault");
-#endif
-
-#ifdef SIGFPE
- case SIGFPE:
- switch (info->si_code)
- {
- case FPE_INTDIV:
- runtime_panicstring ("integer divide by zero");
- case FPE_INTOVF:
- runtime_panicstring ("integer overflow");
- }
- runtime_panicstring ("floating point error");
-#endif
- }
-
- /* All signals with SigPanic should be in cases above, and this
- handler should only be invoked for those signals. */
- __builtin_unreachable ();
-}
-
-#else /* !defined (SA_SIGINFO) */
-
-static void
-sig_panic_handler (int sig)
-{
- G *g;
-
- g = runtime_g ();
- if (g == NULL)
- {
- sig_handler (sig);
- return;
- }
-
- g->sig = sig;
- g->sigcode0 = 0;
- g->sigcode1 = 0;
-
- sig_panic_leadin (sig);
-
- switch (sig)
- {
-#ifdef SIGBUS
- case SIGBUS:
- runtime_panicstring ("invalid memory address or "
- "nil pointer dereference");
-#endif
-
-#ifdef SIGSEGV
- case SIGSEGV:
- runtime_panicstring ("invalid memory address or "
- "nil pointer dereference");
-#endif
-
-#ifdef SIGFPE
- case SIGFPE:
- runtime_panicstring ("integer divide by zero or floating point error");
-#endif
- }
-
- /* All signals with SigPanic should be in cases above, and this
- handler should only be invoked for those signals. */
- __builtin_unreachable ();
-}
-
-#endif /* !defined (SA_SIGINFO) */
-
-/* A signal handler used for signals which are not going to panic.
- This is called on the alternate signal stack so it may not split
- the stack. */
-
-static void
-sig_tramp (int) __attribute__ ((no_split_stack));
-
-static void
-sig_tramp (int sig)
-{
- G *gp;
- M *mp;
-
- /* We are now running on the stack registered via sigaltstack.
- (Actually there is a small span of time between runtime_siginit
- and sigaltstack when the program starts.) */
- gp = runtime_g ();
- mp = runtime_m ();
-
- if (gp != NULL)
- {
-#ifdef USING_SPLIT_STACK
- __splitstack_getcontext (&gp->stack_context[0]);
-#endif
- }
-
- if (gp != NULL && mp->gsignal != NULL)
- {
- /* We are running on the signal stack. Set the split stack
- context so that the stack guards are checked correctly. */
-#ifdef USING_SPLIT_STACK
- __splitstack_setcontext (&mp->gsignal->stack_context[0]);
-#endif
- }
-
- sig_handler (sig);
-
- /* We are going to return back to the signal trampoline and then to
- whatever we were doing before we got the signal. Restore the
- split stack context so that stack guards are checked
- correctly. */
-
- if (gp != NULL)
- {
-#ifdef USING_SPLIT_STACK
- __splitstack_setcontext (&gp->stack_context[0]);
-#endif
- }
-}
-
-void
-runtime_setsig (int32 i, bool def __attribute__ ((unused)), bool restart)
-{
- struct sigaction sa;
- int r;
- SigTab *t;
-
- memset (&sa, 0, sizeof sa);
-
- r = sigfillset (&sa.sa_mask);
- __go_assert (r == 0);
-
- t = &runtime_sigtab[i];
-
- if ((t->flags & SigPanic) == 0)
- {
- sa.sa_flags = SA_ONSTACK;
- sa.sa_handler = sig_tramp;
- }
- else
- {
-#ifdef SA_SIGINFO
- sa.sa_flags = SA_SIGINFO;
- sa.sa_sigaction = sig_panic_info_handler;
-#else
- sa.sa_flags = 0;
- sa.sa_handler = sig_panic_handler;
-#endif
- }
-
- if (restart)
- sa.sa_flags |= SA_RESTART;
-
- if (sigaction (t->sig, &sa, NULL) != 0)
- __go_assert (0);
-}
-
-/* Used by the os package to raise SIGPIPE. */
-
-void os_sigpipe (void) __asm__ (GOSYM_PREFIX "os.sigpipe");
-
-void
-os_sigpipe (void)
-{
- struct sigaction sa;
- int i;
-
- memset (&sa, 0, sizeof sa);
-
- sa.sa_handler = SIG_DFL;
-
- i = sigemptyset (&sa.sa_mask);
- __go_assert (i == 0);
-
- if (sigaction (SIGPIPE, &sa, NULL) != 0)
- abort ();
-
- raise (SIGPIPE);
-}
-
-void
-runtime_setprof(bool on)
-{
- USED(on);
-}
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