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* Manual work on debugging infrastructure.
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Neil Jerram
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6 changed files with 177 additions and 147 deletions
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@page
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@node Debugging
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@chapter Internal Debugging Interface
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--- The name of this chapter needs to clearly distinguish it
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from the appendix describing the debugger UI. The intro
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should have a pointer to the UI appendix.
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@deffn {Scheme Procedure} display-error stack port subr message args rest
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@deffnx {C Function} scm_display_error (stack, port, subr, message, args, rest)
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Display an error message to the output port @var{port}.
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@var{stack} is the saved stack for the error, @var{subr} is
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the name of the procedure in which the error occurred and
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@var{message} is the actual error message, which may contain
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formatting instructions. These will format the arguments in
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the list @var{args} accordingly. @var{rest} is currently
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ignored.
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@end deffn
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@deffn {Scheme Procedure} display-application frame [port [indent]]
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@deffnx {C Function} scm_display_application (frame, port, indent)
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Display a procedure application @var{frame} to the output port
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@var{port}. @var{indent} specifies the indentation of the
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output.
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@end deffn
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@deffn {Scheme Procedure} display-backtrace stack port [first [depth]]
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@deffnx {C Function} scm_display_backtrace (stack, port, first, depth)
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Display a backtrace to the output port @var{port}. @var{stack}
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is the stack to take the backtrace from, @var{first} specifies
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where in the stack to start and @var{depth} how much frames
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to display. Both @var{first} and @var{depth} can be @code{#f},
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which means that default values will be used.
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@end deffn
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@deffn {Scheme Procedure} backtrace
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@deffnx {C Function} scm_backtrace ()
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Display a backtrace of the stack saved by the last error
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to the current output port.
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@end deffn
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@deffn {Scheme Procedure} malloc-stats
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Return an alist ((@var{what} . @var{n}) ...) describing number
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of malloced objects.
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@var{what} is the second argument to @code{scm_must_malloc},
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@var{n} is the number of objects of that type currently
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allocated.
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@end deffn
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@chapter Debugging Infrastructure
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@deffn {Scheme Procedure} debug-options-interface [setting]
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@deffnx {C Function} scm_debug_options (setting)
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@ -54,110 +9,21 @@ this procedure directly, use the procedures @code{debug-enable},
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@code{debug-disable}, @code{debug-set!} and @code{debug-options}.
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@end deffn
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@section Using Traps
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@deffn {Scheme Procedure} with-traps thunk
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@deffnx {C Function} scm_with_traps (thunk)
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Call @var{thunk} with traps enabled.
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@end deffn
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@deffn {Scheme Procedure} memoized? obj
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@deffnx {C Function} scm_memoized_p (obj)
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Return @code{#t} if @var{obj} is memoized.
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@end deffn
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@deffn {Scheme Procedure} unmemoize m
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@deffnx {C Function} scm_unmemoize (m)
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Unmemoize the memoized expression @var{m},
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@end deffn
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@deffn {Scheme Procedure} memoized-environment m
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@deffnx {C Function} scm_memoized_environment (m)
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Return the environment of the memoized expression @var{m}.
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@end deffn
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@deffn {Scheme Procedure} procedure-name proc
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@deffnx {C Function} scm_procedure_name (proc)
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Return the name of the procedure @var{proc}
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@end deffn
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@deffn {Scheme Procedure} procedure-source proc
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@deffnx {C Function} scm_procedure_source (proc)
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Return the source of the procedure @var{proc}.
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@end deffn
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@deffn {Scheme Procedure} procedure-environment proc
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@deffnx {C Function} scm_procedure_environment (proc)
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Return the environment of the procedure @var{proc}.
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@end deffn
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@deffn {Scheme Procedure} debug-object? obj
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@deffnx {C Function} scm_debug_object_p (obj)
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Return @code{#t} if @var{obj} is a debug object.
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@end deffn
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@deffn {Scheme Procedure} frame-arguments frame
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@deffnx {C Function} scm_frame_arguments (frame)
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Return the arguments of @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-evaluating-args? frame
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@deffnx {C Function} scm_frame_evaluating_args_p (frame)
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Return @code{#t} if @var{frame} contains evaluated arguments.
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@end deffn
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@deffn {Scheme Procedure} frame-next frame
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@deffnx {C Function} scm_frame_next (frame)
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Return the next frame of @var{frame}, or @code{#f} if
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@var{frame} is the last frame in its stack.
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@end deffn
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@deffn {Scheme Procedure} frame-number frame
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@deffnx {C Function} scm_frame_number (frame)
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Return the frame number of @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-overflow? frame
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@deffnx {C Function} scm_frame_overflow_p (frame)
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Return @code{#t} if @var{frame} is an overflow frame.
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@end deffn
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@deffn {Scheme Procedure} frame-previous frame
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@deffnx {C Function} scm_frame_previous (frame)
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Return the previous frame of @var{frame}, or @code{#f} if
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@var{frame} is the first frame in its stack.
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@end deffn
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@deffn {Scheme Procedure} frame-procedure frame
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@deffnx {C Function} scm_frame_procedure (frame)
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Return the procedure for @var{frame}, or @code{#f} if no
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procedure is associated with @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-procedure? frame
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@deffnx {C Function} scm_frame_procedure_p (frame)
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Return @code{#t} if a procedure is associated with @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-real? frame
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@deffnx {C Function} scm_frame_real_p (frame)
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Return @code{#t} if @var{frame} is a real frame.
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@end deffn
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@deffn {Scheme Procedure} frame-source frame
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@deffnx {C Function} scm_frame_source (frame)
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Return the source of @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame? obj
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@deffnx {C Function} scm_frame_p (obj)
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Return @code{#t} if @var{obj} is a stack frame.
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@end deffn
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@deffn {Scheme Procedure} last-stack-frame obj
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@deffnx {C Function} scm_last_stack_frame (obj)
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Return a stack which consists of a single frame, which is the
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last stack frame for @var{obj}. @var{obj} must be either a
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debug object or a continuation.
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@end deffn
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@section Capturing the Stack or Innermost Stack Frame
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@deffn {Scheme Procedure} make-stack obj . args
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@deffnx {C Function} scm_make_stack (obj, args)
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@ -191,6 +57,21 @@ If the @var{outer_cut_N} of the last pair is missing, it is
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taken as 0.
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@end deffn
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@deffn {Scheme Procedure} last-stack-frame obj
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@deffnx {C Function} scm_last_stack_frame (obj)
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Return a stack which consists of a single frame, which is the
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last stack frame for @var{obj}. @var{obj} must be either a
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debug object or a continuation.
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@end deffn
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@section Examining the Stack
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@deffn {Scheme Procedure} stack? obj
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@deffnx {C Function} scm_stack_p (obj)
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Return @code{#t} if @var{obj} is a calling stack.
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@end deffn
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@deffn {Scheme Procedure} stack-id stack
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@deffnx {C Function} scm_stack_id (stack)
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Return the identifier given to @var{stack} by @code{start-stack}.
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@ -206,9 +87,99 @@ Return the length of @var{stack}.
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Return the @var{index}'th frame from @var{stack}.
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@end deffn
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@deffn {Scheme Procedure} stack? obj
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@deffnx {C Function} scm_stack_p (obj)
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Return @code{#t} if @var{obj} is a calling stack.
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@deffn {Scheme Procedure} display-backtrace stack port [first [depth]]
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@deffnx {C Function} scm_display_backtrace (stack, port, first, depth)
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Display a backtrace to the output port @var{port}. @var{stack}
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is the stack to take the backtrace from, @var{first} specifies
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where in the stack to start and @var{depth} how much frames
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to display. Both @var{first} and @var{depth} can be @code{#f},
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which means that default values will be used.
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@end deffn
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@section Examining Stack Frames
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@deffn {Scheme Procedure} frame? obj
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@deffnx {C Function} scm_frame_p (obj)
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Return @code{#t} if @var{obj} is a stack frame.
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@end deffn
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@deffn {Scheme Procedure} frame-number frame
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@deffnx {C Function} scm_frame_number (frame)
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Return the frame number of @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-previous frame
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@deffnx {C Function} scm_frame_previous (frame)
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Return the previous frame of @var{frame}, or @code{#f} if
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@var{frame} is the first frame in its stack.
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@end deffn
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@deffn {Scheme Procedure} frame-next frame
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@deffnx {C Function} scm_frame_next (frame)
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Return the next frame of @var{frame}, or @code{#f} if
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@var{frame} is the last frame in its stack.
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@end deffn
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@deffn {Scheme Procedure} frame-source frame
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@deffnx {C Function} scm_frame_source (frame)
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Return the source of @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-procedure? frame
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@deffnx {C Function} scm_frame_procedure_p (frame)
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Return @code{#t} if a procedure is associated with @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-procedure frame
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@deffnx {C Function} scm_frame_procedure (frame)
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Return the procedure for @var{frame}, or @code{#f} if no
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procedure is associated with @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-arguments frame
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@deffnx {C Function} scm_frame_arguments (frame)
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Return the arguments of @var{frame}.
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@end deffn
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@deffn {Scheme Procedure} frame-evaluating-args? frame
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@deffnx {C Function} scm_frame_evaluating_args_p (frame)
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Return @code{#t} if @var{frame} contains evaluated arguments.
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@end deffn
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@deffn {Scheme Procedure} frame-overflow? frame
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@deffnx {C Function} scm_frame_overflow_p (frame)
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Return @code{#t} if @var{frame} is an overflow frame.
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@end deffn
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@deffn {Scheme Procedure} frame-real? frame
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@deffnx {C Function} scm_frame_real_p (frame)
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Return @code{#t} if @var{frame} is a real frame.
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@end deffn
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@deffn {Scheme Procedure} display-application frame [port [indent]]
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@deffnx {C Function} scm_display_application (frame, port, indent)
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Display a procedure application @var{frame} to the output port
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@var{port}. @var{indent} specifies the indentation of the
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output.
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@end deffn
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@section Decoding Memoized Source Expressions
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@deffn {Scheme Procedure} memoized? obj
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@deffnx {C Function} scm_memoized_p (obj)
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Return @code{#t} if @var{obj} is memoized.
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@end deffn
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@deffn {Scheme Procedure} unmemoize m
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@deffnx {C Function} scm_unmemoize (m)
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Unmemoize the memoized expression @var{m},
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@end deffn
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@deffn {Scheme Procedure} memoized-environment m
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@deffnx {C Function} scm_memoized_environment (m)
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Return the environment of the memoized expression @var{m}.
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@end deffn
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