Frames ​

Scheme Procedure: frame? obj ​

C Function: scm_frame_p (obj) ​

Return #t if obj is a stack frame.

Scheme Procedure: frame-previous frame ​

C Function: scm_frame_previous (frame) ​

Return the previous frame of frame, or #f if frame is the first frame in its stack.

Scheme Procedure: frame-procedure-name frame ​

C Function: scm_frame_procedure_name (frame) ​

Return the name of the procedure being applied in frame, as a symbol, or #f if the procedure has no name.

Scheme Procedure: frame-arguments frame ​

C Function: scm_frame_arguments (frame) ​

Return the arguments of frame.

Scheme Procedure: frame-address frame ​

Scheme Procedure: frame-instruction-pointer frame ​

Scheme Procedure: frame-stack-pointer frame ​

Accessors for the three VM registers associated with this frame: the frame pointer (fp), instruction pointer (ip), and stack pointer (sp), respectively. See VM Concepts, for more information.

Scheme Procedure: frame-return-address frame ​

Scheme Procedure: frame-mv-return-address frame ​

Accessors for the three saved VM registers in a frame: the previous frame pointer, the single-value return address, and the multiple-value return address. See Stack Layout, for more information.

Scheme Procedure: frame-bindings frame ​

Return a list of binding records indicating the local variables that are live in a frame.

Scheme Procedure: frame-lookup-binding frame var ​

Fetch the bindings in frame, and return the first one whose name is var, or #f otherwise.

Scheme Procedure: binding-index binding ​

Scheme Procedure: binding-name binding ​

Scheme Procedure: binding-slot binding ​

Scheme Procedure: binding-representation binding ​

Accessors for the various fields in a binding. The implicit “callee” argument is index 0, the first argument is index 1, and so on to the end of the arguments. After that are temporary variables. Note that if a variable is dead, it might not be available.

Scheme Procedure: binding-ref binding ​

Scheme Procedure: binding-set! binding val ​

Accessors for the values of local variables in a frame.

Scheme Procedure: display-application frame [port [indent]] ​

C Function: scm_display_application (frame, port, indent) ​

Display a procedure application frame to the output port port. indent specifies the indentation of the output.

Additionally, the (system vm frame) module defines a number of higher-level introspective procedures, for example to retrieve the names of local variables, and the source location to correspond to a frame. See its source code for more details.