8 lines
3.5 KiB
Plaintext
8 lines
3.5 KiB
Plaintext
XEROX DEBUGGER-CONTEXT
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DEBUGGER-CONTEXT
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By: Herb Jellinek (Jellinek.pa@xerox.com)
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This document last edited on August 13, 1987.
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Introduction
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When debugging Common Lisp programs, have you ever wished that the Xerox Lisp debugger let you do things in the right lexical context? Ever wish you could access locally-defined functions, return from blocks, or evaluate variables in the debugger without resorting to the inspector? Ever wish you could tell the "big boys" in Washington a thing or two? Well, two out of three ain't bad. DEBUGGER-CONTEXT gives you the ability to access and modify the lexical context of code you are debugging in a straightforward way.
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User Interface
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DEBUGGER-CONTEXT defines two debugger commands that affect the debugger's lexical context.
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lex [Debugger Command]
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Sets the lexical context of the debugger window to that of the stack frame selected in the backtrace window (il:lastpos). Henceforth, all evaluation done in this debugger window will be with respect to that lexical environment. The lexical environment of a frame is taken to be the first one encountered as an argument in that frame. Once the lex command is given, selecting other stack frames in the backtrace window will not change the lexical environment; you must issue another lex command to do so.
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The lexical environment of a frame is taken to be the first one encountered as an argument in that frame.
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unlex [Debugger Command]
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Removes the current lexical context; all evaluation will subsequently be done with respect to the current dynamic environment.
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(LIST ((PAGE NIL (FOLIOINFO (ARABIC) STARTINGPAGE# 1) (0 0 612 792) ((FOLIO NIL (PARALOOKS (QUAD CENTERED) CHARLOOKS (SUPERSCRIPT 0 SIZE 10 FAMILY MODERN OVERLINE OFF STRIKEOUT OFF UNDERLINE OFF SLOPE REGULAR WEIGHT MEDIUM) FORMATINFO (ARABIC)) (174 36 288 36) NIL) (HEADING NIL (HEADINGTYPE RUNNINGHEAD) (84 744 444 36) NIL) (TEXT NIL NIL (84 96 456 600) NIL))) (PAGE NIL NIL (0 0 612 792) ((FOLIO NIL (PARALOOKS (QUAD CENTERED) CHARLOOKS (SUPERSCRIPT 0 SIZE 10 FAMILY MODERN OVERLINE OFF STRIKEOUT OFF UNDERLINE OFF SLOPE REGULAR WEIGHT MEDIUM)) (282 42 72 36) NIL) (HEADING NIL (HEADINGTYPE RUNNINGHEAD) (84 744 444 36) NIL) (TEXT NIL NIL (84 96 456 600) NIL))) (PAGE NIL NIL (0 0 612 792) ((FOLIO NIL (PARALOOKS (QUAD CENTERED) CHARLOOKS (SUPERSCRIPT 0 SIZE 10 FAMILY MODERN OVERLINE OFF STRIKEOUT OFF UNDERLINE OFF SLOPE REGULAR WEIGHT MEDIUM)) (282 42 72 36) NIL) (HEADING NIL (HEADINGTYPE RUNNINGHEAD) (84 744 444 36) NIL) (TEXT NIL NIL (84 96 456 600) NIL))))) / <01> <01> T . <01> <01> ( <01> ( <00> <00>8 ( <00> <00>8 D <01> <01> PAGEHEADING RUNNINGHEAD TERMINAL
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MODERN
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MODERN
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MODERN MODERN LOGO HRULE.GETFN MODERN
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HRULE.GETFN MODERN
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HRULE.GETFN MODERN
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HRULE.GETFN MODERN HRULE.GETFN MODERN + . [ m
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<00> <00> j <00> ' 6z<36> |