1.0.36.9: UD2-BREAKPOINTS feature for x86oid systems

[sbcl.git] / base-target-features.lisp-expr

diff --git a/base-target-features.lisp-expr b/base-target-features.lisp-expr
index 60161d4..7bd7caf 100644 (file)
--- a/base-target-features.lisp-expr
+++ b/base-target-features.lisp-expr
@@ -237,6 +237,11 @@
  ;; local storage.
  ; :restore-tls-segment-register-from-tls
 
+ ;; On some x86oid operating systems (darwin) SIGTRAP is not reliably
+ ;; delivered for the INT3 instruction, so we use the UD2 instruction
+ ;; which generates SIGILL instead.
+ ; :ud2-breakpoints
+
  ;; Support for detection of unportable code (when applied to the
  ;; COMMON-LISP package, or SBCL-internal pacakges) or bad-neighbourly
  ;; code (when applied to user-level packages), relating to material