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WIP - stack traces

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This commit is contained in:
Justin Ethier 2015-07-13 22:12:32 -04:00
parent 9a7bb95130
commit 489bbeeb1e
2 changed files with 61 additions and 31 deletions
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85
cgen.scm
View file

@ -140,6 +140,26 @@
assign (number->string n) ";")
""))
;;; Stack trace (call history) helpers
;; Add function to trace, if not already set
(define (st:add-function! trace fnc)
(if (null? (cdr trace))
(set-cdr! trace fnc)
#f))
(define (st:->code trace)
;;(write `(JAE DEBUG ,trace))
(if (or (not (pair? trace))
(null? (cdr trace)))
""
(string-append
(car trace)
":"
(symbol->string (cdr trace)))))
;; END st helpers
;;; Compilation routines.
;; Return generated code that also requests allocation of C variables on stack
@ -202,11 +222,11 @@
(c:body cp)))
;; c-compile-program : exp -> string
(define (c-compile-program exp)
(define (c-compile-program exp src-file)
(let* ((preamble "")
(append-preamble (lambda (s)
(set! preamble (string-append preamble " " s "\n"))))
(body (c-compile-exp exp append-preamble "cont")))
(body (c-compile-exp exp append-preamble "cont" (list src-file))))
;(write `(DEBUG ,body))
(string-append
preamble
@ -222,7 +242,10 @@
;; append-preamble - ??
;; cont - name of the next continuation
;; this is experimental and probably needs refinement
(define (c-compile-exp exp append-preamble cont)
;; trace - trace information. presently a pair containing:
;; * source file
;; * function name (or nil if none)
(define (c-compile-exp exp append-preamble cont trace)
(cond
; Core forms:
((const? exp) (c-compile-const exp))
@ -231,22 +254,22 @@
(c-code (string-append "primitive_" (mangle exp))))
((ref? exp) (c-compile-ref exp))
((quote? exp) (c-compile-quote exp))
((if? exp) (c-compile-if exp append-preamble cont))
((if? exp) (c-compile-if exp append-preamble cont trace))
; IR (2):
((tagged-list? '%closure exp)
(c-compile-closure exp append-preamble cont))
(c-compile-closure exp append-preamble cont trace))
; Global definition
((define? exp)
(c-compile-global exp append-preamble cont))
(c-compile-global exp append-preamble cont trace))
; Special case - global function w/out a closure. Create an empty closure
((tagged-list? 'lambda exp)
(c-compile-exp
`(%closure ,exp)
append-preamble cont))
append-preamble cont trace))
; Application:
((app? exp) (c-compile-app exp append-preamble cont))
((app? exp) (c-compile-app exp append-preamble cont trace))
(else (error "unknown exp in c-compile-exp: " exp))))
(define (c-compile-quote qexp)
@ -647,7 +670,7 @@
(mangle exp))))
; c-compile-args : list[exp] (string -> void) -> string
(define (c-compile-args args append-preamble prefix cont)
(define (c-compile-args args append-preamble prefix cont trace)
(letrec ((num-args 0)
(_c-compile-args
(lambda (args append-preamble prefix cont)
@ -659,7 +682,7 @@
(c:append/prefix
prefix
(c-compile-exp (car args)
append-preamble cont)
append-preamble cont trace)
(_c-compile-args (cdr args)
append-preamble ", " cont)))))))
(c:tuple/args
@ -668,14 +691,14 @@
num-args)))
;; c-compile-app : app-exp (string -> void) -> string
(define (c-compile-app exp append-preamble cont)
(define (c-compile-app exp append-preamble cont trace)
;(trace:debug `(c-compile-app: ,exp))
(let (($tmp (mangle (gensym 'tmp))))
(let* ((args (app->args exp))
(fun (app->fun exp)))
(cond
((lambda? fun)
(let* ((lid (allocate-lambda (c-compile-lambda fun))) ;; TODO: pass in free vars? may be needed to track closures
(let* ((lid (allocate-lambda (c-compile-lambda fun trace))) ;; TODO: pass in free vars? may be needed to track closures
;; properly, wait until this comes up in an example
(this-cont (string-append "__lambda_" (number->string lid)))
(cgen
@ -683,7 +706,8 @@
args
append-preamble
""
this-cont))
this-cont
trace))
(num-cargs (c:num-args cgen)))
(set-c-call-arity! num-cargs)
(c-code
@ -698,7 +722,7 @@
(let* ((c-fun
(c-compile-prim fun cont))
(c-args
(c-compile-args args append-preamble "" ""))
(c-compile-args args append-preamble "" "" trace))
(num-args (length args))
(num-args-str
(string-append
@ -733,9 +757,9 @@
;; TODO: may not be good enough, closure app could be from an elt
((tagged-list? '%closure-ref fun)
(let* ((cfun (c-compile-args (list (car args)) append-preamble " " cont))
(let* ((cfun (c-compile-args (list (car args)) append-preamble " " cont trace))
(this-cont (c:body cfun))
(cargs (c-compile-args (cdr args) append-preamble " " this-cont)))
(cargs (c-compile-args (cdr args) append-preamble " " this-cont trace)))
(set-c-call-arity! (c:num-args cargs))
(c-code
(string-append
@ -750,10 +774,10 @@
((tagged-list? '%closure fun)
(let* ((cfun (c-compile-closure
fun append-preamble cont))
fun append-preamble cont trace))
(this-cont (string-append "(closure)" (c:body cfun)))
(cargs (c-compile-args
args append-preamble " " this-cont))
args append-preamble " " this-cont trace))
(num-cargs (c:num-args cargs)))
(set-c-call-arity! num-cargs)
(c-code
@ -771,9 +795,9 @@
(error `(Unsupported function application ,exp)))))))
; c-compile-if : if-exp -> string
(define (c-compile-if exp append-preamble cont)
(define (c-compile-if exp append-preamble cont trace)
(let* ((compile (lambda (exp)
(c-compile-exp exp append-preamble cont)))
(c-compile-exp exp append-preamble cont trace)))
(test (compile (if->condition exp)))
(then (compile (if->then exp)))
(els (compile (if->else exp))))
@ -795,7 +819,7 @@
(define (add-global var-sym lambda? code)
;(write `(add-global ,var-sym ,code))
(set! *globals* (cons (list var-sym lambda? code) *globals*)))
(define (c-compile-global exp append-preamble cont)
(define (c-compile-global exp append-preamble cont trace)
(let ((var (define->var exp))
(body (if (equal? 4 (length exp)) ; Simple var assignment contains superfluous %closure-ref
(cadddr exp)
@ -803,7 +827,9 @@
(add-global
var
(lambda? body)
(c-compile-exp body append-preamble cont))
(c-compile-exp
body append-preamble cont
(st:add-function! trace var)))
(c-code/vars "" (list ""))))
;; Symbol compilation
@ -863,7 +889,7 @@
;; the closure. The closure conversion phase tags each access
;; to one with the corresponding index so `lambda` can use them.
;;
(define (c-compile-closure exp append-preamble cont)
(define (c-compile-closure exp append-preamble cont trace)
(let* ((lam (closure->lam exp))
(free-vars
(map
@ -876,7 +902,7 @@
(mangle free-var)))
(closure->fv exp))) ; Note these are not necessarily symbols, but in cc form
(cv-name (mangle (gensym 'c)))
(lid (allocate-lambda (c-compile-lambda lam)))
(lid (allocate-lambda (c-compile-lambda lam trace)))
(create-nclosure (lambda ()
(string-append
"closureN_type " cv-name ";\n"
@ -927,7 +953,7 @@
"")))))
; c-compile-lambda : lamda-exp (string -> void) -> (string -> string)
(define (c-compile-lambda exp)
(define (c-compile-lambda exp trace)
(let* ((preamble "")
(append-preamble (lambda (s)
(set! preamble (string-append preamble " " s "\n")))))
@ -955,7 +981,8 @@
(body (c-compile-exp
(car (lambda->exp exp)) ;; car ==> assume single expr in lambda body after CPS
append-preamble
(mangle env-closure))))
(mangle env-closure)
trace)))
(cons
(lambda (name)
(string-append "static void " name
@ -979,6 +1006,7 @@
(if has-closure? 1 0)))
");\n");
"") ; No varargs, skip
(st:->code trace)
(c:serialize body " ") "; \n"
"}\n"))
formals*))))
@ -989,7 +1017,8 @@
lib-exports
imported-globals
globals
required-libs)
required-libs
src-file)
(set! *global-syms* (append globals imported-globals))
(let ((compiled-program-lst '())
(compiled-program #f))
@ -998,7 +1027,7 @@
(for-each
(lambda (expr)
(set! compiled-program-lst
(cons (c-compile-program expr) compiled-program-lst)))
(cons (c-compile-program expr src-file) compiled-program-lst)))
input-program)
;; Get top-level string

7
cyclone.scm
View file

@ -48,7 +48,7 @@
;; Code emission.
; c-compile-and-emit : (string -> A) exp -> void
(define (c-compile-and-emit input-program lib-deps)
(define (c-compile-and-emit input-program lib-deps src-file)
(call/cc
(lambda (return)
(define globals '())
@ -231,7 +231,8 @@
lib-exports
imported-vars
module-globals
lib-deps)
lib-deps
src-file)
(return '())))) ;; No codes to return
;; TODO: longer-term, will be used to find where cyclone's data is installed
@ -263,7 +264,7 @@
(with-output-to-file
src-file
(lambda ()
(c-compile-and-emit program lib-deps)))))
(c-compile-and-emit program lib-deps src-file)))))
(result (create-c-file in-prog)))
;; Compile the generated C file