| 1 | ;;;-*-Mode: LISP; Package: CCL -*- |
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| 2 | ;;; |
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| 3 | ;;; Copyright (C) 1994-2001 Digitool, Inc |
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| 4 | ;;; This file is part of OpenMCL. |
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| 5 | ;;; |
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| 6 | ;;; OpenMCL is licensed under the terms of the Lisp Lesser GNU Public |
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| 7 | ;;; License , known as the LLGPL and distributed with OpenMCL as the |
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| 8 | ;;; file "LICENSE". The LLGPL consists of a preamble and the LGPL, |
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| 9 | ;;; which is distributed with OpenMCL as the file "LGPL". Where these |
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| 10 | ;;; conflict, the preamble takes precedence. |
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| 11 | ;;; |
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| 12 | ;;; OpenMCL is referenced in the preamble as the "LIBRARY." |
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| 13 | ;;; |
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| 14 | ;;; The LLGPL is also available online at |
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| 15 | ;;; http://opensource.franz.com/preamble.html |
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| 16 | |
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| 17 | ;;; backtrace.lisp |
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| 18 | ;;; low-level support for stack-backtrace printing |
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| 19 | |
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| 20 | (in-package "CCL") |
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| 21 | |
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| 22 | #+ppc-target (require "PPC-BACKTRACE") |
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| 23 | #+x86-target (require "X86-BACKTRACE") |
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| 24 | |
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| 25 | |
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| 26 | (defparameter *backtrace-show-internal-frames* nil) |
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| 27 | (defparameter *backtrace-print-level* 2) |
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| 28 | (defparameter *backtrace-print-length* 5) |
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| 29 | |
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| 30 | ;;; This PRINTS the call history on *DEBUG-IO*. It's more dangerous |
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| 31 | ;;; (because of stack consing) to actually return it. |
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| 32 | |
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| 33 | (defun print-call-history (&key context |
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| 34 | (origin (%get-frame-ptr)) |
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| 35 | (detailed-p t) |
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| 36 | (count most-positive-fixnum) |
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| 37 | (start-frame-number 0)) |
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| 38 | (let* ((tcr (if context (bt.tcr context) (%current-tcr)))) |
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| 39 | (if (eq tcr (%current-tcr)) |
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| 40 | (%print-call-history-internal context origin detailed-p (or count most-positive-fixnum) start-frame-number) |
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| 41 | (unwind-protect |
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| 42 | (progn |
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| 43 | (%suspend-tcr tcr ) |
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| 44 | (%print-call-history-internal context origin detailed-p |
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| 45 | count start-frame-number)) |
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| 46 | (%resume-tcr tcr))) |
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| 47 | (values))) |
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| 48 | |
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| 49 | (defun map-call-frames (fn &key context |
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| 50 | (origin (%get-frame-ptr)) |
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| 51 | (start-frame-number 0) |
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| 52 | (include-internal nil)) |
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| 53 | (let* ((tcr (if context (bt.tcr context) (%current-tcr)))) |
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| 54 | (if (eq tcr (%current-tcr)) |
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| 55 | (%map-call-frames-internal fn context origin include-internal start-frame-number) |
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| 56 | (unwind-protect |
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| 57 | (progn |
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| 58 | (%suspend-tcr tcr) |
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| 59 | (%map-call-frames-internal fn context origin include-internal start-frame-number)) |
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| 60 | (%resume-tcr tcr)))) |
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| 61 | nil) |
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| 62 | |
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| 63 | (defun %show-stack-frame (p context lfun pc) |
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| 64 | (handler-case |
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| 65 | (multiple-value-bind (count vsp parent-vsp) (count-values-in-frame p context) |
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| 66 | (declare (fixnum count)) |
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| 67 | (dotimes (i count) |
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| 68 | (multiple-value-bind (var type name) |
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| 69 | (nth-value-in-frame p i context lfun pc vsp parent-vsp) |
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| 70 | (format t "~& ~D " i) |
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| 71 | (when name (format t "~s" name)) |
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| 72 | (let* ((*print-length* *backtrace-print-length*) |
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| 73 | (*print-level* *backtrace-print-level*)) |
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| 74 | (format t ": ~s" var)) |
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| 75 | (when type (format t " (~S)" type))))) |
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| 76 | (error () (format t "#<error printing frame>"))) |
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| 77 | (terpri) |
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| 78 | (terpri)) |
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| 79 | |
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| 80 | (defun %show-args-and-locals (p context lfun pc) |
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| 81 | (handler-case |
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| 82 | (let* ((unavailable (cons nil nil))) |
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| 83 | (multiple-value-bind (args locals) (arguments-and-locals context p lfun pc unavailable) |
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| 84 | (format t "~& ~s" (arglist-from-map lfun)) |
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| 85 | (let* ((*print-length* *backtrace-print-length*) |
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| 86 | (*print-level* *backtrace-print-level*)) |
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| 87 | (flet ((show-pair (pair prefix) |
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| 88 | (destructuring-bind (name . val) pair |
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| 89 | (format t "~&~a~s: " prefix name) |
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| 90 | (if (eq val unavailable) |
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| 91 | (format t "#<Unavailable>") |
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| 92 | (format t "~s" val))))) |
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| 93 | (dolist (arg args) |
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| 94 | (show-pair arg " ")) |
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| 95 | (terpri) |
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| 96 | (terpri) |
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| 97 | (dolist (loc locals) |
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| 98 | (show-pair loc " ")))))) |
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| 99 | (error () (format t "#<error printing args and locals>"))) |
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| 100 | (terpri) |
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| 101 | (terpri)) |
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| 102 | |
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| 103 | |
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| 104 | (defun backtrace-call-arguments (context cfp lfun pc) |
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| 105 | (collect ((call)) |
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| 106 | (let* ((name (function-name lfun))) |
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| 107 | (if (function-is-current-definition? lfun) |
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| 108 | (call name) |
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| 109 | (progn |
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| 110 | (call 'funcall) |
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| 111 | (call `(function ,(concatenate 'string "#<" (%lfun-name-string lfun) ">"))))) |
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| 112 | (if (and pc (<= pc target::arg-check-trap-pc-limit)) |
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| 113 | (append (call) (arg-check-call-arguments cfp lfun)) |
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| 114 | (multiple-value-bind (req opt restp keys) |
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| 115 | (function-args lfun) |
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| 116 | (when (or (not (eql 0 req)) (not (eql 0 opt)) restp keys) |
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| 117 | (let* ((arglist (arglist-from-map lfun))) |
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| 118 | (if (or (null arglist) (null pc)) |
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| 119 | (call "???") |
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| 120 | (progn |
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| 121 | (dotimes (i req) |
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| 122 | (let* ((val (argument-value context cfp lfun pc (pop arglist)))) |
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| 123 | (if (eq val (%unbound-marker)) |
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| 124 | (call "?") |
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| 125 | (call (let* ((*print-length* *backtrace-print-length*) |
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| 126 | (*print-level* *backtrace-print-level*)) |
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| 127 | (format nil "~s" val)))))) |
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| 128 | (if (or restp keys (not (eql opt 0))) |
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| 129 | (call "[...]")))))) |
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| 130 | (call)))))) |
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| 131 | |
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| 132 | |
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| 133 | ;;; Return a list of "interesting" frame addresses in context, most |
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| 134 | ;;; recent first. |
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| 135 | (defun %stack-frames-in-context (context &optional (include-internal *backtrace-show-internal-frames*)) |
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| 136 | (collect ((frames)) |
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| 137 | (do* ((p (bt.youngest context) (parent-frame p context)) |
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| 138 | (q (bt.oldest context))) |
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| 139 | ((eql p q) (frames)) |
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| 140 | (when (or (not (catch-csp-p p context)) include-internal) |
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| 141 | (when (or (cfp-lfun p) include-internal) |
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| 142 | (frames p)))))) |
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| 143 | |
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| 144 | (defun %map-call-frames-internal (fn context origin include-internal skip-initial) |
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| 145 | (let ((*standard-output* *debug-io*) |
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| 146 | (*print-circle* nil) |
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| 147 | (p origin) |
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| 148 | (q (last-frame-ptr context))) |
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| 149 | (dotimes (i skip-initial) |
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| 150 | (setq p (parent-frame p context)) |
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| 151 | (when (or (null p) (eq p q) (%stack< q p context)) |
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| 152 | (return (setq p nil)))) |
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| 153 | (do* ((p p (parent-frame p context))) |
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| 154 | ((or (null p) (eq p q) (%stack< q p context)) nil) |
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| 155 | (when (or include-internal |
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| 156 | (and (not (catch-csp-p p context)) (cfp-lfun p))) |
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| 157 | (funcall fn p))))) |
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| 158 | |
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| 159 | (defun %print-call-history-internal (context origin detailed-p |
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| 160 | &optional (count most-positive-fixnum) (skip-initial 0)) |
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| 161 | (let ((*standard-output* *debug-io*) |
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| 162 | (*print-circle* nil) |
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| 163 | (p origin) |
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| 164 | (q (last-frame-ptr context))) |
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| 165 | (dotimes (i skip-initial) |
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| 166 | (setq p (parent-frame p context)) |
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| 167 | (when (or (null p) (eq p q) (%stack< q p context)) |
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| 168 | (return (setq p nil)))) |
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| 169 | (do* ((frame-number (or skip-initial 0) (1+ frame-number)) |
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| 170 | (i 0 (1+ i)) |
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| 171 | (p p (parent-frame p context))) |
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| 172 | ((or (null p) (eq p q) (%stack< q p context) |
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| 173 | (>= i count)) |
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| 174 | (values)) |
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| 175 | (declare (fixnum frame-number i)) |
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| 176 | (when (or (not (catch-csp-p p context)) |
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| 177 | *backtrace-show-internal-frames*) |
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| 178 | (multiple-value-bind (lfun pc) (cfp-lfun p) |
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| 179 | (when (or lfun *backtrace-show-internal-frames*) |
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| 180 | (unless (and (typep detailed-p 'fixnum) |
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| 181 | (not (= (the fixnum detailed-p) frame-number))) |
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| 182 | (format t "~&~c(~x) : ~D ~a ~d" |
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| 183 | (if (exception-frame-p p) #\* #\space) |
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| 184 | (index->address p) frame-number |
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| 185 | (if lfun (backtrace-call-arguments context p lfun pc)) |
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| 186 | pc) |
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| 187 | (when detailed-p |
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| 188 | (if (eq detailed-p :raw) |
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| 189 | (%show-stack-frame p context lfun pc) |
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| 190 | (%show-args-and-locals p context lfun pc)))))))))) |
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| 191 | |
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| 192 | |
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| 193 | (defun %access-lisp-data (vstack-index) |
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| 194 | (%fixnum-ref vstack-index)) |
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| 195 | |
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| 196 | (defun %store-lisp-data (vstack-index value) |
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| 197 | (setf (%fixnum-ref vstack-index) value)) |
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| 198 | |
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| 199 | (defun closed-over-value (data) |
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| 200 | (if (closed-over-value-p data) |
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| 201 | (uvref data 0) |
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| 202 | data)) |
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| 203 | |
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| 204 | (defun set-closed-over-value (value-cell value) |
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| 205 | (setf (uvref value-cell 0) value)) |
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| 206 | |
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| 207 | |
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| 208 | |
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| 209 | ;;; Act as if VSTACK-INDEX points at some lisp data & return that data. |
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| 210 | (defun access-lisp-data (vstack-index) |
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| 211 | (closed-over-value (%access-lisp-data vstack-index))) |
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| 212 | |
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| 213 | (defun find-local-name (cellno lfun pc) |
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| 214 | (let* ((n cellno)) |
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| 215 | (when lfun |
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| 216 | (multiple-value-bind (mask where) (registers-used-by lfun pc) |
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| 217 | (if (and where (< (1- where) n (+ where (logcount mask)))) |
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| 218 | (let ((j *saved-register-count*)) |
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| 219 | (decf n where) |
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| 220 | (loop (loop (if (logbitp (decf j) mask) (return))) |
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| 221 | (if (< (decf n) 0) (return))) |
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| 222 | (values (format nil "saved ~a" (aref *saved-register-names* j)) |
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| 223 | nil)) |
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| 224 | (multiple-value-bind (nreq nopt restp nkeys junk optinitp junk ncells nclosed) |
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| 225 | (if lfun (function-args lfun)) |
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| 226 | (declare (ignore junk optinitp)) |
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| 227 | (if nkeys (setq nkeys (+ nkeys nkeys))) |
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| 228 | (values |
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| 229 | (if (and ncells (< n ncells)) |
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| 230 | (if (< n nclosed) |
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| 231 | :inherited |
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| 232 | (if (< (setq n (- n nclosed)) nreq) |
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| 233 | "required" |
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| 234 | (if (< (setq n (- n nreq)) nopt) |
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| 235 | "optional" |
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| 236 | (progn |
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| 237 | (setq n (- n nopt)) |
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| 238 | (progn |
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| 239 | (if (and nkeys (< n nkeys)) |
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| 240 | (if (not (logbitp 0 n)) ; a keyword |
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| 241 | "keyword" |
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| 242 | "key-supplied-p") |
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| 243 | (progn |
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| 244 | (if nkeys (setq n (- n nkeys))) |
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| 245 | (if (and restp (zerop n)) |
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| 246 | "rest" |
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| 247 | "opt-supplied-p"))))))))) |
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| 248 | (match-local-name cellno (function-symbol-map lfun) pc)))))))) |
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| 249 | |
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| 250 | (defun map-entry-value (context cfp lfun pc idx unavailable) |
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| 251 | (declare (fixnum pc idx)) |
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| 252 | (let* ((info (function-symbol-map lfun))) |
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| 253 | (if (null info) |
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| 254 | unavailable |
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| 255 | (let* ((addrs (cdr info)) |
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| 256 | (i (* 3 idx)) |
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| 257 | (addr (svref addrs i)) |
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| 258 | (startpc (svref addrs (the fixnum (+ i 1)))) |
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| 259 | (endpc (svref addrs (the fixnum (+ i 2))))) |
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| 260 | (declare (fixnum i addr startpc endpc)) |
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| 261 | (if (or (< pc startpc) |
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| 262 | (>= pc endpc)) |
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| 263 | unavailable |
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| 264 | (let* ((value (if (= #o77 (ldb (byte 6 0) addr)) |
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| 265 | (raw-frame-ref cfp context (ash addr (- (+ target::word-shift 6))) |
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| 266 | unavailable) |
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| 267 | (find-register-argument-value context cfp addr unavailable)))) |
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| 268 | (if (typep value 'value-cell) |
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| 269 | (uvref value 0) |
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| 270 | value))))))) |
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| 271 | |
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| 272 | ;;; Returns non-nil on success (not newval) |
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| 273 | (defun set-map-entry-value (context cfp lfun pc idx newval) |
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| 274 | (declare (fixnum pc idx)) |
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| 275 | (let* ((unavailable (cons nil nil)) |
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| 276 | (value (map-entry-value context cfp lfun pc idx unavailable))) |
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| 277 | (if (eq value unavailable) |
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| 278 | nil |
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| 279 | (if (typep value 'value-cell) |
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| 280 | (progn (setf (uvref value 0) newval) t) |
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| 281 | |
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| 282 | (let* ((addrs (cdr (function-symbol-map lfun))) |
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| 283 | (addr (svref addrs (the fixnum (* 3 idx))))) |
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| 284 | (declare (fixnum addr)) |
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| 285 | (if (= #o77 (ldb (byte 6 0) addr)) |
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| 286 | (raw-frame-set cfp context (ash addr (- (+ target::word-shift 6))) newval) |
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| 287 | (set-register-argument-value context cfp addr newval)) |
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| 288 | t))))) |
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| 289 | |
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| 290 | |
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| 291 | (defun argument-value (context cfp lfun pc name &optional (quote t)) |
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| 292 | (declare (fixnum pc)) |
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| 293 | (let* ((info (function-symbol-map lfun)) |
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| 294 | (unavailable (%unbound-marker))) |
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| 295 | (if (null info) |
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| 296 | unavailable |
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| 297 | (let* ((names (car info)) |
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| 298 | (addrs (cdr info))) |
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| 299 | (do* ((nname (1- (length names)) (1- nname)) |
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| 300 | (naddr (- (length addrs) 3) (- naddr 3))) |
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| 301 | ((or (< nname 0) (< naddr 0)) unavailable) |
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| 302 | (declare (fixnum nname naddr)) |
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| 303 | (when (eq (svref names nname) name) |
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| 304 | (let* ((value |
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| 305 | (let* ((addr (svref addrs naddr)) |
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| 306 | (startpc (svref addrs (the fixnum (1+ naddr)))) |
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| 307 | (endpc (svref addrs (the fixnum (+ naddr 2))))) |
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| 308 | (declare (fixnum addr startpc endpc)) |
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| 309 | (if (or (< pc startpc) |
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| 310 | (>= pc endpc)) |
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| 311 | unavailable |
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| 312 | (if (= #o77 (ldb (byte 6 0) addr)) |
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| 313 | (raw-frame-ref cfp context (ash addr (- (+ target::word-shift 6))) |
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| 314 | unavailable) |
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| 315 | (find-register-argument-value context cfp addr unavailable)))))) |
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| 316 | (if (typep value 'value-cell) |
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| 317 | (setq value (uvref value 0))) |
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| 318 | (if (or (not quote) (self-evaluating-p value)) |
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| 319 | (return value) |
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| 320 | (return (list 'quote value)))))))))) |
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| 321 | |
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| 322 | |
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| 323 | |
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| 324 | (defun raw-frame-ref (cfp context index bad) |
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| 325 | (%raw-frame-ref cfp context index bad)) |
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| 326 | |
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| 327 | (defun raw-frame-set (cfp context index new) |
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| 328 | (%raw-frame-set cfp context index new)) |
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| 329 | |
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| 330 | (defun find-register-argument-value (context cfp regval bad) |
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| 331 | (%find-register-argument-value context cfp regval bad)) |
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| 332 | |
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| 333 | (defun set-register-argument-value (context cfp regval newval) |
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| 334 | (%set-register-argument-value context cfp regval newval)) |
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| 335 | |
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| 336 | |
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| 337 | |
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| 338 | (defun dbg-form (frame-number) |
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| 339 | (when *break-frame* |
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| 340 | (let* ((cfp (nth-raw-frame frame-number *break-frame* nil))) |
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| 341 | (if (and cfp (not (catch-csp-p cfp nil))) |
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| 342 | (multiple-value-bind (function pc) |
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| 343 | (cfp-lfun cfp) |
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| 344 | (if (and function |
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| 345 | (function-is-current-definition? function)) |
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| 346 | (block %cfp-form |
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| 347 | (collect ((form)) |
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| 348 | (multiple-value-bind (nreq nopt restp keys allow-other-keys |
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| 349 | optinit lexprp ncells nclosed) |
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| 350 | (function-args function) |
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| 351 | (declare (ignore ncells)) |
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| 352 | (unless (or lexprp restp (> 0 nclosed) (> 0 nopt) keys allow-other-keys |
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| 353 | optinit) |
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| 354 | (let* ((name (function-name function))) |
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| 355 | (multiple-value-bind (arglist win) |
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| 356 | (arglist-from-map function) |
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| 357 | (when (and win name (symbolp name)) |
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| 358 | (form name) |
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| 359 | (dotimes (i nreq) |
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| 360 | (let* ((val (argument-value nil cfp function pc (pop arglist)))) |
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| 361 | (if (closed-over-value-p val) |
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| 362 | (setq val (%svref val target::value-cell.value-cell))) |
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| 363 | (if (eq val (%unbound-marker)) |
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| 364 | (return-from %cfp-form nil)) |
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| 365 | (form val)))))))) |
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| 366 | (form))))))))) |
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| 367 | |
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| 368 | (defun function-args (lfun) |
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| 369 | "Returns 9 values, as follows: |
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| 370 | req = number of required arguments |
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| 371 | opt = number of optional arguments |
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| 372 | restp = t if rest arg |
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| 373 | keys = number of keyword arguments or NIL if &key not mentioned |
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| 374 | allow-other-keys = t if &allow-other-keys present |
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| 375 | optinit = t if any optional arg has non-nil default value or supplied-p |
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| 376 | variable |
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| 377 | lexprp = t if function is a lexpr, in which case all other values are |
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| 378 | undefined. |
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| 379 | ncells = number of stack frame cells used by all arguments. |
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| 380 | nclosed = number of inherited values (now counted distinctly from required) |
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| 381 | All numeric values (but ncells) are mod 64." |
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| 382 | (let* ((bits (lfun-bits lfun)) |
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| 383 | (req (ldb $lfbits-numreq bits)) |
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| 384 | (opt (ldb $lfbits-numopt bits)) |
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| 385 | (restp (logbitp $lfbits-rest-bit bits)) |
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| 386 | (keyvect (lfun-keyvect lfun)) |
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| 387 | (keys (and keyvect (length keyvect))) |
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| 388 | (allow-other-keys (logbitp $lfbits-aok-bit bits)) |
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| 389 | (optinit (logbitp $lfbits-optinit-bit bits)) |
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| 390 | (lexprp (logbitp $lfbits-restv-bit bits)) |
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| 391 | (nclosed (ldb $lfbits-numinh bits))) |
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| 392 | (values req opt restp keys allow-other-keys optinit lexprp |
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| 393 | (unless (or lexprp) |
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| 394 | (+ req opt (if restp 1 0) (if keys (+ keys keys) 0) |
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| 395 | (if optinit opt 0) nclosed)) |
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| 396 | nclosed))) |
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| 397 | |
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| 398 | ;;; If we can tell reliably, return the function's minimum number of |
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| 399 | ;;; non-inherited arguments, the maximum number of such arguments (or NIL), |
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| 400 | ;;; and the actual number of such arguments. We "can't tell" if either |
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| 401 | ;;; of the arguments to this function are null, and we can't tell reliably |
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| 402 | ;;; if any of the lfbits fields are full. |
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| 403 | (defun min-max-actual-args (fn nargs) |
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| 404 | (let* ((lfbits (if (and fn nargs) |
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| 405 | (lfun-bits fn) |
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| 406 | -1)) |
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| 407 | (raw-req (ldb $lfbits-numreq lfbits)) |
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| 408 | (raw-opt (ldb $lfbits-numopt lfbits)) |
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| 409 | (raw-inh (ldb $lfbits-numinh lfbits))) |
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| 410 | (declare (fixnum raw-req raw-opt raw-inh)) |
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| 411 | (if (or (eql raw-req (1- (ash 1 (byte-size $lfbits-numreq)))) |
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| 412 | (eql raw-opt (1- (ash 1 (byte-size $lfbits-numopt)))) |
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| 413 | (eql raw-inh (1- (ash 1 (byte-size $lfbits-numinh))))) |
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| 414 | (values nil nil nil) |
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| 415 | (values raw-req |
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| 416 | (unless (or (lfun-keyvect fn) |
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| 417 | (logbitp $lfbits-rest-bit lfbits) |
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| 418 | (logbitp $lfbits-restv-bit lfbits)) |
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| 419 | (+ raw-req raw-opt)) |
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| 420 | (- nargs raw-inh))))) |
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| 421 | |
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| 422 | |
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| 423 | |
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| 424 | (defun closed-over-value-p (value) |
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| 425 | (eql target::subtag-value-cell (typecode value))) |
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| 426 | |
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| 427 | |
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| 428 | (defun variables-in-scope (lfun pc) |
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| 429 | ;; Return a list of all symbol names "in scope" in the function lfun |
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| 430 | ;; at relative program counter PC, using the function's symbol map. |
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| 431 | ;; The list will be ordered so that least-recent bindings appear first. |
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| 432 | ;; Return a list of the matching symbol map entries as a second value |
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| 433 | (when pc |
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| 434 | (locally (declare (fixnum pc)) |
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| 435 | (let* ((map (function-symbol-map lfun)) |
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| 436 | (names (car map)) |
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| 437 | (info (cdr map))) |
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| 438 | (when map |
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| 439 | (let* ((vars ()) |
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| 440 | (indices ())) |
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| 441 | (dotimes (i (length names) (values vars indices)) |
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| 442 | (let* ((start-pc (aref info (1+ (* 3 i)))) |
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| 443 | (end-pc (aref info (+ 2 (* 3 i))))) |
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| 444 | (declare (fixnum start-pc end-pc)) |
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| 445 | (when (and (>= pc start-pc) |
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| 446 | (< pc end-pc)) |
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| 447 | (push i indices) |
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| 448 | (push (svref names i) vars)))))))))) |
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| 449 | |
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| 450 | |
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| 451 | (defun arg-value (context cfp lfun pc unavailable name) |
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| 452 | (multiple-value-bind (vars map-indices) (variables-in-scope lfun pc) |
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| 453 | (multiple-value-bind (valid req opt rest keys) |
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| 454 | (arg-names-from-map lfun pc) |
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| 455 | (if valid |
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| 456 | (let* ((nargs (+ (length req) (length opt) (if rest 1 0) (length keys))) |
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| 457 | (pos (position name vars))) |
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| 458 | (if (and pos (< pos nargs)) |
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| 459 | (map-entry-value context cfp lfun pc (nth pos map-indices) unavailable) |
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| 460 | unavailable)) |
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| 461 | unavailable)))) |
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| 462 | |
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| 463 | (defun local-value (context cfp lfun pc unavailable name) |
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| 464 | (multiple-value-bind (vars map-indices) (variables-in-scope lfun pc) |
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| 465 | (multiple-value-bind (valid req opt rest keys) |
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| 466 | (arg-names-from-map lfun pc) |
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| 467 | (if valid |
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| 468 | (let* ((nargs (+ (length req) (length opt) (if rest 1 0) (length keys))) |
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| 469 | (names (nthcdr nargs vars)) |
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| 470 | (indices (nthcdr nargs map-indices)) |
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| 471 | (pos (if (typep name 'unsigned-byte) |
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| 472 | name |
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| 473 | (position name names :from-end t)))) |
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| 474 | (if (and pos (< pos nargs)) |
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| 475 | (map-entry-value context cfp lfun pc (nth pos indices) unavailable) |
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| 476 | unavailable)) |
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| 477 | unavailable)))) |
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| 478 | |
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| 479 | (defun set-arg-value (context cfp lfun pc name new) |
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| 480 | (multiple-value-bind (vars map-indices) (variables-in-scope lfun pc) |
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| 481 | (multiple-value-bind (valid req opt rest keys) |
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| 482 | (arg-names-from-map lfun pc) |
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| 483 | (if valid |
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| 484 | (let* ((nargs (+ (length req) (length opt) (if rest 1 0) (length keys))) |
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| 485 | (pos (position name vars))) |
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| 486 | (when (and pos (< pos nargs)) |
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| 487 | (set-map-entry-value context cfp lfun pc (nth pos map-indices) new))))))) |
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| 488 | |
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| 489 | (defun set-local-value (context cfp lfun pc name new) |
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| 490 | (multiple-value-bind (vars map-indices) (variables-in-scope lfun pc) |
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| 491 | (multiple-value-bind (valid req opt rest keys) |
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| 492 | (arg-names-from-map lfun pc) |
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| 493 | (if valid |
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| 494 | (let* ((nargs (+ (length req) (length opt) (if rest 1 0) (length keys))) |
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| 495 | (names (nthcdr nargs vars)) |
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| 496 | (indices (nthcdr nargs map-indices)) |
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| 497 | (pos (if (typep name 'unsigned-byte) |
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| 498 | name |
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| 499 | (position name names :from-end t)))) |
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| 500 | (if (and pos (< pos nargs)) |
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| 501 | (set-map-entry-value context cfp lfun pc (nth pos indices) new))))))) |
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| 502 | |
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| 503 | |
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| 504 | (defun arguments-and-locals (context cfp lfun pc &optional unavailable) |
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| 505 | (multiple-value-bind (vars map-indices) (variables-in-scope lfun pc) |
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| 506 | (collect ((args) |
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| 507 | (locals)) |
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| 508 | (multiple-value-bind (valid req opt rest keys) |
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| 509 | (arg-names-from-map lfun pc) |
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| 510 | (when valid |
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| 511 | (let* ((nargs (+ (length req) (length opt) (if rest 1 0) (length keys))) |
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| 512 | (nlocals (- (length vars) nargs)) |
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| 513 | (local-vars (nthcdr nargs vars)) |
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| 514 | (local-indices (nthcdr nargs map-indices)) |
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| 515 | (arg-vars (nbutlast vars nlocals)) |
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| 516 | (arg-indices (nbutlast map-indices nlocals))) |
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| 517 | (flet ((get-arg-value (name) |
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| 518 | (let* ((pos (position name arg-vars :test #'eq))) |
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| 519 | (when pos |
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| 520 | (args (cons name (map-entry-value context cfp lfun pc (nth pos arg-indices) unavailable)))))) |
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| 521 | (get-local-value (name) |
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| 522 | (when name |
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| 523 | (locals (cons name (map-entry-value context cfp lfun pc (pop local-indices) unavailable)))))) |
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| 524 | (dolist (name req) |
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| 525 | (get-arg-value name)) |
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| 526 | (dolist (name opt) |
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| 527 | (get-arg-value name)) |
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| 528 | (when rest |
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| 529 | (get-arg-value rest)) |
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| 530 | (dolist (name keys) |
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| 531 | (get-arg-value name)) |
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| 532 | #+no |
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| 533 | (setq local-vars (nreverse local-vars) |
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| 534 | local-indices (nreverse local-indices)) |
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| 535 | (dolist (name local-vars) |
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| 536 | (get-local-value name))))) |
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| 537 | (values (args) (locals)))))) |
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| 538 | |
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| 539 | |
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| 540 | |
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| 541 | (defun safe-cell-value (val) |
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| 542 | val) |
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| 543 | |
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| 544 | (defun closure-closed-over-values (closure) |
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| 545 | (when (typep closure 'compiled-lexical-closure) |
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| 546 | (let* ((inner (closure-function closure)) |
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| 547 | (nclosed (nth-value 8 (function-args inner))) |
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| 548 | (names (car (function-symbol-map inner)))) |
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| 549 | (when nclosed |
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| 550 | (collect ((cells)) |
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| 551 | (do* ((i (1- (length names)) (1- i)) |
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| 552 | (k 0 (1+ k)) |
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| 553 | (idx 2 (1+ idx))) |
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| 554 | ((= k nclosed) (reverse (cells))) |
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| 555 | (let* ((name (svref names i)) |
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| 556 | (imm (nth-immediate closure idx))) |
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| 557 | (cells (list name (if (closed-over-value-p imm) |
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| 558 | (closed-over-value imm) |
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| 559 | imm)))))))))) |
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| 560 | |
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| 561 | |
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| 562 | ;;; Find the oldest binding frame that binds the same symbol as |
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| 563 | ;;; FRAME in context. If found, return the saved value of that |
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| 564 | ;;; binding, else the value of the symbol in the context's thread. |
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| 565 | (defun oldest-binding-frame-value (context frame) |
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| 566 | (let* ((oldest nil) |
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| 567 | (binding-index (%fixnum-ref frame (ash 1 target::fixnum-shift)))) |
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| 568 | (do* ((db (db-link context) (%fixnum-ref db 0))) |
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| 569 | ((eq frame db) |
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| 570 | (if oldest |
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| 571 | (%fixnum-ref oldest (ash 2 target::fixnum-shift)) |
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| 572 | (let* ((symbol (binding-index-symbol binding-index))) |
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| 573 | (if context |
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| 574 | (symbol-value-in-tcr symbol (bt.tcr context)) |
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| 575 | (%sym-value symbol))))) |
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| 576 | (if (eq (%fixnum-ref db (ash 1 target::fixnum-shift)) binding-index) |
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| 577 | (setq oldest db))))) |
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| 578 | |
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| 579 | (defun (setf oldest-binding-frame-value) (new context frame) |
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| 580 | (let* ((oldest nil) |
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| 581 | (binding-index (%fixnum-ref frame (ash 1 target::fixnum-shift)))) |
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| 582 | (do* ((db (db-link context) (%fixnum-ref db 0))) |
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| 583 | ((eq frame db) |
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| 584 | (if oldest |
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| 585 | (setf (%fixnum-ref oldest (ash 2 target::fixnum-shift)) new) |
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| 586 | (let* ((symbol (binding-index-symbol binding-index))) |
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| 587 | (if context |
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| 588 | (setf (symbol-value-in-tcr symbol (bt.tcr context)) new) |
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| 589 | (%set-sym-value symbol new))))) |
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| 590 | (if (eq (%fixnum-ref db (ash 1 target::fixnum-shift)) binding-index) |
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| 591 | (setq oldest db))))) |
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| 592 | |
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| 593 | |
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| 594 | |
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| 595 | ;;; End of backtrace.lisp |
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