(defvar *required-alignment*
#+(and ppc darwin) 16
- #+(and ppc linux) 16
- #+(or mips x86-64) 8
- #+x86 4
+ #+(and ppc linux) 8
+ #+x86-64 16
+ #+mips 8
+ #+(and x86 (not darwin)) 4
+ #+(and x86 darwin) 16
#-(or x86 x86-64 mips (and ppc (or darwin linux))) (error "Unknown platform"))
;;;; Build the offset-tool as regular excutable, and run it with
;;;; fork/exec, so that no lisp is on the stack. This is our known-good
;;;; number.
-(run "cc" "stack-alignment-offset.c" "-o" "stack-alignment-offset")
+(run "cc"
+ #+(and (or linux freebsd) (or x86-64 ppc mips)) "-fPIC"
+ #+(and x86-64 darwin) "-arch" #+(and x86-64 darwin) "x86_64"
+ "stack-alignment-offset.c" "-o" "stack-alignment-offset")
(defparameter *good-offset*
(parse-integer (run "./stack-alignment-offset"
;;;; Build the tool again, this time as a shared object, and load it
(run "cc" "stack-alignment-offset.c"
+ #+(and (or linux freebsd) (or x86-64 ppc mips)) "-fPIC"
+ #+(and x86-64 darwin) "-arch" #+(and x86-64 darwin) "x86_64"
#+darwin "-bundle" #-darwin "-shared"
"-o" "stack-alignment-offset.so")
-(load-shared-object "stack-alignment-offset.so")
+(load-shared-object (truename "stack-alignment-offset.so"))
(define-alien-routine stack-alignment-offset int (alignment int))
(define-alien-routine trampoline int (callback (function int)))
;;;; Now get the offset by calling from lisp, first with a regular foreign function
;;;; call, then with an intervening callback.
-(assert (= *good-offset* (stack-alignment-offset *required-alignment*)))
+(with-test (:name :regular)
+ (assert (= *good-offset* (stack-alignment-offset *required-alignment*))))
-(assert (= *good-offset* (trampoline (alien-lambda int ()
- (stack-alignment-offset *required-alignment*)))))
+(with-test (:name :callback)
+ (assert (= *good-offset* (trampoline (alien-lambda int ()
+ (stack-alignment-offset *required-alignment*))))))
+
+(delete-file "stack-alignment-offset")
+(delete-file "stack-alignment-offset.so")
;;;; success!