72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/* debug.c: The primitive `backtrace-list'.
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*
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* $Id$
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*
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* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
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* Copyright 2002, 2003 Sam Hocevar <sam@zoy.org>, Paris
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*
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* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
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* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
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* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
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* between TELES and Nixdorf Microprocessor Engineering, Berlin).
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*
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* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
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* owners or individual owners of copyright in this software, grant to any
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* person or company a worldwide, royalty free, license to
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*
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* i) copy this software,
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* ii) prepare derivative works based on this software,
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* iii) distribute copies of this software or derivative works,
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* iv) perform this software, or
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* v) display this software,
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*
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* provided that this notice is not removed and that neither Oliver Laumann
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* nor Teles nor Nixdorf are deemed to have made any representations as to
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* the suitability of this software for any purpose nor are held responsible
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* for any defects of this software.
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*
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* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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#include "config.h"
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#include "kernel.h"
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Object P_Backtrace_List (int argc, Object *argv) {
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register GCNODE *p, *gp = GC_List;
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register int delta = 0;
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Object cp, list, tail, cell, vec;
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GC_Node3;
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if (argc > 0) {
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cp = argv[0];
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Check_Type (cp, T_Control_Point);
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delta = CONTROL(cp)->delta;
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gp = CONTROL(cp)->gclist;
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}
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vec = list = tail = Null;
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GC_Link3 (vec, list, tail);
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for ( ; gp; gp = p->next) {
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p = (GCNODE *)NORM(gp);
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switch (p->gclen) {
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case TAG_ENV:
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vec = Make_Vector (3, Null);
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VECTOR(vec)->data[2] = *(Object *)NORM(p->gcobj);
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break;
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case TAG_FUN: case TAG_TCFUN:
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VECTOR(vec)->data[0] = *(Object *)NORM(p->gcobj);
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break;
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case TAG_ARGS:
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VECTOR(vec)->data[1] = *(Object *)NORM(p->gcobj);
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cell = Cons (vec, Null);
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if (Nullp (list))
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list = cell;
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else
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(void)P_Set_Cdr (tail, cell);
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tail = cell;
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}
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}
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GC_Unlink;
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return list;
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}
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