X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Finterrupt.c;h=648850ff07bddc63693de1199690859a21c28a62;hb=d83c8a160b4215cfc5379dd4fb70c9589a428ae0;hp=8bc1e8bd60d9094b3fa5edc9a2fc3e9e0ddd1af5;hpb=481348f2f96f364374f669786f9fc61348decabc;p=sbcl.git

diff --git a/src/runtime/interrupt.c b/src/runtime/interrupt.c
index 8bc1e8b..648850f 100644
--- a/src/runtime/interrupt.c
+++ b/src/runtime/interrupt.c
@@ -83,7 +83,6 @@ void sigaddset_deferrable(sigset_t *s)
     sigaddset(s, SIGPIPE);
     sigaddset(s, SIGALRM);
     sigaddset(s, SIGURG);
-    sigaddset(s, SIGFPE);
     sigaddset(s, SIGTSTP);
     sigaddset(s, SIGCHLD);
     sigaddset(s, SIGIO);
@@ -144,7 +143,8 @@ inline static void check_interrupts_enabled_or_lose(os_context_t *context)
  * becomes 'yes'.) */
 boolean internal_errors_enabled = 0;
 
-struct interrupt_data * global_interrupt_data;
+static void (*interrupt_low_level_handlers[NSIG]) (int, siginfo_t*, void*);
+union interrupt_handler interrupt_handlers[NSIG];
 
 /* At the toplevel repl we routinely call this function.  The signal
  * mask ought to be clear anyway most of the time, but may be non-zero
@@ -157,17 +157,7 @@ void reset_signal_mask ()
     thread_sigmask(SIG_SETMASK,&new,0);
 }
 
-void block_deferrable_signals_and_inhibit_gc ()
-{
-    struct thread *thread=arch_os_get_current_thread();
-    sigset_t block;
-    sigemptyset(&block);
-    sigaddset_deferrable(&block);
-    thread_sigmask(SIG_BLOCK, &block, 0);
-    bind_variable(GC_INHIBIT,T,thread);
-}
-
-static void block_blockable_signals ()
+void block_blockable_signals ()
 {
     sigset_t block;
     sigemptyset(&block);
@@ -427,13 +417,13 @@ void
 interrupt_handle_now(int signal, siginfo_t *info, void *void_context)
 {
     os_context_t *context = (os_context_t*)void_context;
-    struct thread *thread=arch_os_get_current_thread();
 #if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
     boolean were_in_lisp;
 #endif
     union interrupt_handler handler;
     check_blockables_blocked_or_lose();
-    check_interrupts_enabled_or_lose(context);
+    if (sigismember(&deferrable_sigset,signal))
+        check_interrupts_enabled_or_lose(context);
 
 #ifdef LISP_FEATURE_LINUX
     /* Under Linux on some architectures, we appear to have to restore
@@ -441,7 +431,7 @@ interrupt_handle_now(int signal, siginfo_t *info, void *void_context)
        delivered we appear to have a null FPU control word. */
     os_restore_fp_control(context);
 #endif
-    handler = thread->interrupt_data->interrupt_handlers[signal];
+    handler = interrupt_handlers[signal];
 
     if (ARE_SAME_HANDLER(handler.c, SIG_IGN)) {
         return;
@@ -477,7 +467,10 @@ interrupt_handle_now(int signal, siginfo_t *info, void *void_context)
          * because we're not in pseudoatomic and allocation shouldn't
          * be interrupted.  In which case it's no longer an issue as
          * all our allocation from C now goes through a PA wrapper,
-         * but still, doesn't hurt */
+         * but still, doesn't hurt.
+         *
+         * Yeah, but non-gencgc platforms that don't really wrap
+         * allocation in PA. MG - 2005-08-29  */
 
         lispobj info_sap,context_sap = alloc_sap(context);
         info_sap = alloc_sap(info);
@@ -615,8 +608,7 @@ maybe_now_maybe_later(int signal, siginfo_t *info, void *void_context)
 #ifdef LISP_FEATURE_LINUX
     os_restore_fp_control(context);
 #endif
-    if(maybe_defer_handler(interrupt_handle_now,data,
-                           signal,info,context))
+    if(maybe_defer_handler(interrupt_handle_now,data,signal,info,context))
         return;
     interrupt_handle_now(signal, info, context);
 #ifdef LISP_FEATURE_DARWIN
@@ -629,17 +621,13 @@ static void
 low_level_interrupt_handle_now(int signal, siginfo_t *info, void *void_context)
 {
     os_context_t *context = (os_context_t*)void_context;
-    struct thread *thread=arch_os_get_current_thread();
-    struct interrupt_data *data=
-        thread ? thread->interrupt_data : global_interrupt_data;
 
 #ifdef LISP_FEATURE_LINUX
     os_restore_fp_control(context);
 #endif
     check_blockables_blocked_or_lose();
     check_interrupts_enabled_or_lose(context);
-    (*data->interrupt_low_level_handlers[signal])
-        (signal, info, void_context);
+    interrupt_low_level_handlers[signal](signal, info, void_context);
 #ifdef LISP_FEATURE_DARWIN
     /* Work around G5 bug */
     DARWIN_FIX_CONTEXT(context);
@@ -651,8 +639,7 @@ low_level_maybe_now_maybe_later(int signal, siginfo_t *info, void *void_context)
 {
     os_context_t *context = arch_os_get_context(&void_context);
     struct thread *thread=arch_os_get_current_thread();
-    struct interrupt_data *data=
-        thread ? thread->interrupt_data : global_interrupt_data;
+    struct interrupt_data *data=thread->interrupt_data;
 #ifdef LISP_FEATURE_LINUX
     os_restore_fp_control(context);
 #endif
@@ -976,8 +963,7 @@ interrupt_maybe_gc(int signal, siginfo_t *info, void *void_context)
 {
     os_context_t *context=(os_context_t *) void_context;
     struct thread *th=arch_os_get_current_thread();
-    struct interrupt_data *data=
-        th ? th->interrupt_data : global_interrupt_data;
+    struct interrupt_data *data=th->interrupt_data;
 
     if(!foreign_function_call_active && gc_trigger_hit(signal, info, context)){
         struct thread *thread=arch_os_get_current_thread();
@@ -1065,9 +1051,6 @@ undoably_install_low_level_interrupt_handler (int signal,
                                                            void*))
 {
     struct sigaction sa;
-    struct thread *th=arch_os_get_current_thread();
-    struct interrupt_data *data=
-        th ? th->interrupt_data : global_interrupt_data;
 
     if (0 > signal || signal >= NSIG) {
         lose("bad signal number %d", signal);
@@ -1091,7 +1074,7 @@ undoably_install_low_level_interrupt_handler (int signal,
 #endif
 
     sigaction(signal, &sa, NULL);
-    data->interrupt_low_level_handlers[signal] =
+    interrupt_low_level_handlers[signal] =
         (ARE_SAME_HANDLER(handler, SIG_DFL) ? 0 : handler);
 }
 
@@ -1102,9 +1085,6 @@ install_handler(int signal, void handler(int, siginfo_t*, void*))
     struct sigaction sa;
     sigset_t old, new;
     union interrupt_handler oldhandler;
-    struct thread *th=arch_os_get_current_thread();
-    struct interrupt_data *data=
-        th ? th->interrupt_data : global_interrupt_data;
 
     FSHOW((stderr, "/entering POSIX install_handler(%d, ..)\n", signal));
 
@@ -1112,9 +1092,9 @@ install_handler(int signal, void handler(int, siginfo_t*, void*))
     sigaddset(&new, signal);
     thread_sigmask(SIG_BLOCK, &new, &old);
 
-    FSHOW((stderr, "/data->interrupt_low_level_handlers[signal]=%x\n",
-           (unsigned int)data->interrupt_low_level_handlers[signal]));
-    if (data->interrupt_low_level_handlers[signal]==0) {
+    FSHOW((stderr, "/interrupt_low_level_handlers[signal]=%x\n",
+           (unsigned int)interrupt_low_level_handlers[signal]));
+    if (interrupt_low_level_handlers[signal]==0) {
         if (ARE_SAME_HANDLER(handler, SIG_DFL) ||
             ARE_SAME_HANDLER(handler, SIG_IGN)) {
             sa.sa_sigaction = handler;
@@ -1130,8 +1110,8 @@ install_handler(int signal, void handler(int, siginfo_t*, void*))
         sigaction(signal, &sa, NULL);
     }
 
-    oldhandler = data->interrupt_handlers[signal];
-    data->interrupt_handlers[signal].c = handler;
+    oldhandler = interrupt_handlers[signal];
+    interrupt_handlers[signal].c = handler;
 
     thread_sigmask(SIG_SETMASK, &old, 0);
 
@@ -1150,11 +1130,9 @@ interrupt_init()
     sigaddset_deferrable(&deferrable_sigset);
     sigaddset_blockable(&blockable_sigset);
 
-    global_interrupt_data=calloc(sizeof(struct interrupt_data), 1);
-
     /* Set up high level handler information. */
     for (i = 0; i < NSIG; i++) {
-        global_interrupt_data->interrupt_handlers[i].c =
+        interrupt_handlers[i].c =
             /* (The cast here blasts away the distinction between
              * SA_SIGACTION-style three-argument handlers and
              * signal(..)-style one-argument handlers, which is OK