X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-signal.lisp;h=9fab9d171d263a6b5dd348463c1214474883f1d2;hb=de3bfc084239fa962ef001eaa68e5b6f4b9bbf81;hp=7394695713d07dc98e9e7ba53a91491d64c2a24d;hpb=6e60dc9f79037ab84f5bfd8568979c24291c9922;p=sbcl.git

diff --git a/src/code/target-signal.lisp b/src/code/target-signal.lisp
index 7394695..9fab9d1 100644
--- a/src/code/target-signal.lisp
+++ b/src/code/target-signal.lisp
@@ -99,6 +99,7 @@
     sb!alien:void
   (where sb!alien:unsigned-long)
   (old sb!alien:unsigned-long))
+#!-sb-safepoint
 (sb!alien:define-alien-routine ("unblock_gc_signals" %unblock-gc-signals)
     sb!alien:void
   (where sb!alien:unsigned-long)
@@ -107,6 +108,7 @@
 (defun unblock-deferrable-signals ()
   (%unblock-deferrable-signals 0 0))
 
+#!-sb-safepoint
 (defun unblock-gc-signals ()
   (%unblock-gc-signals 0 0))
 
@@ -186,9 +188,26 @@
                  (signal int)
                  ;; Then enter the debugger like BREAK.
                  (%break 'sigint int))))))
+    #!+sb-safepoint
+    (let ((target (sb!thread::foreground-thread)))
+      ;; Note that INTERRUPT-THREAD on *CURRENT-THREAD* doesn't actually
+      ;; interrupt right away, because deferrables are blocked.  Rather,
+      ;; the kernel would arrange for the SIGPIPE to hit when the SIGINT
+      ;; handler is done.  However, on safepoint builds, we don't use
+      ;; SIGPIPE and lack an appropriate mechanism to handle pending
+      ;; thruptions upon exit from signal handlers (and this situation is
+      ;; unlike WITHOUT-INTERRUPTS, which handles pending interrupts
+      ;; explicitly at the end).  Only as long as safepoint builds pretend
+      ;; to cooperate with signals -- that is, as long as SIGINT-HANDLER
+      ;; is used at all -- detect this situation and work around it.
+      (if (eq target sb!thread:*current-thread*)
+          (interrupt-it)
+          (sb!thread:interrupt-thread target #'interrupt-it)))
+    #!-sb-safepoint
     (sb!thread:interrupt-thread (sb!thread::foreground-thread)
                                 #'interrupt-it)))
 
+#!-sb-wtimer
 (defun sigalrm-handler (signal info context)
   (declare (ignore signal info context))
   (declare (type system-area-pointer context))
@@ -198,6 +217,7 @@
   (declare (ignore signal code context))
   (sb!ext:exit))
 
+#!-sb-thruption
 ;;; SIGPIPE is not used in SBCL for its original purpose, instead it's
 ;;; for signalling a thread that it should look at its interruption
 ;;; queue. The handler (RUN_INTERRUPTION) just returns if there is
@@ -224,11 +244,13 @@
   (enable-interrupt sigbus #'sigbus-handler)
   #!-linux
   (enable-interrupt sigsys #'sigsys-handler)
+  #!-sb-wtimer
   (enable-interrupt sigalrm #'sigalrm-handler)
+  #!-sb-thruption
   (enable-interrupt sigpipe #'sigpipe-handler)
   (enable-interrupt sigchld #'sigchld-handler)
   #!+hpux (ignore-interrupt sigxcpu)
-  (unblock-gc-signals)
+  #!-sb-safepoint (unblock-gc-signals)
   (unblock-deferrable-signals)
   (values))