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finally, backtraces only showing frames for the computation

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* module/system/repl/repl.scm (run-repl): Run the thunk in a stack in a
  prompt, similar to the default prompt. Gives proper backtraces.

* module/system/repl/error-handling.scm (call-with-error-handling):
  Narrow one more outer frame, for the %start-stack thunk invocation.

* module/ice-9/boot-9.scm (%start-stack): Reindent.
This commit is contained in:
Andy Wingo 2010-07-10 12:21:50 +02:00
parent dc3b266118
commit 5273854080
3 changed files with 21 additions and 11 deletions
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2
module/ice-9/boot-9.scm
View file

@ -1056,7 +1056,7 @@ If there is no handler at all, Guile prints an error and then exits."
(or (fluid-ref %stacks) '()))))
(thunk)))
(lambda (k . args)
(%start-stack tag (lambda () (apply k args)))))))
(%start-stack tag (lambda () (apply k args)))))))
(define-syntax start-stack
(syntax-rules ()
((_ tag exp)

22
module/system/repl/error-handling.scm
View file

@ -88,15 +88,19 @@
(format #t " or `,q' to return to the old prompt.\n")
(let ((debug
(make-debug
(narrow-stack->vector
stack
;; Cut three frames from the top of the stack:
;; make-stack, this one, and the throw handler.
3
;; Narrow the end of the stack to the most recent
;; start-stack.
(and (pair? (fluid-ref %stacks))
(cdar (fluid-ref %stacks))))
(let ((tag (and (pair? (fluid-ref %stacks))
(cdar (fluid-ref %stacks)))))
(narrow-stack->vector
stack
;; Cut three frames from the top of the stack:
;; make-stack, this one, and the throw handler.
3
;; Narrow the end of the stack to the most recent
;; start-stack.
tag
;; And one more frame, because %start-stack invoking
;; the start-stack thunk has its own frame too.
0 (and tag 1)))
0)))
((@ (system repl repl) start-repl) #:debug debug)))))))
((pass)

8
module/system/repl/repl.scm
View file

@ -106,6 +106,12 @@
(abort))))))
(define (run-repl repl)
(define (with-stack-and-prompt thunk)
(call-with-prompt (default-prompt-tag)
(lambda () (start-stack #t (thunk)))
(lambda (k proc)
(with-stack-and-prompt (lambda () (proc k))))))
(% (with-fluids ((*repl-stack*
(cons repl (or (fluid-ref *repl-stack*) '()))))
(if (null? (cdr (fluid-ref *repl-stack*)))
@ -140,7 +146,7 @@
(repl-parse repl exp))))))
(run-hook before-eval-hook exp)
(with-error-handling
(start-stack #t (% (thunk)))))
(with-stack-and-prompt thunk)))
(lambda (k) (values))))
(lambda l
(for-each (lambda (v)