Import Upstream version 5d6upstream/5d6

1 files changed, 751 insertions, 0 deletions

diff --git a/debug.c b/debug.c
new file mode 100644
index 0000000..22c387b
--- /dev/null
+++ b/debug.c
@@ -0,0 +1,751 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111, USA.
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of SCM.
+ *
+ * The exception is that, if you link the SCM library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the SCM library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name SCM.  If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * SCM, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way.  To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for SCM, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.
+ */
+
+/* "debug.c" procedures for displaying and debugging code.
+   Authors: Radey Shouman & Aubrey Jaffer. */
+
+#include "scm.h"
+#include "setjump.h"
+
+long tc16_codeptr;		/*  Type code for non-executable code
+				    wrappers */
+
+static SCM prinhead P((SCM x, SCM port, int writing));
+static void prinbindings P((SCM names, SCM inits, SCM init_env,
+			    SCM steps, SCM step_env, SCM port, int writing));
+
+SCM scm_env_rlookup(addr, stenv, what)
+     SCM addr, stenv;
+     char *what;
+{
+  SCM env, fr;
+  int icdrp;
+  unsigned int idist, iframe;
+  if (IMP(addr)) {
+    if (!ILOCP(addr)) return BOOL_F;
+    iframe = IFRAME(addr);
+    idist = IDIST(addr);
+    icdrp = ICDRP(addr) && 1;
+  }
+  else {
+    if (!ISYMP(CAR(addr))) return BOOL_F;
+    icdrp = 0;
+    switch (ISYMNUM(CAR(addr))) {
+    default: return BOOL_F;
+    case (ISYMNUM(IM_FARLOC_CDR)):
+      icdrp = 1;
+    case (ISYMNUM(IM_FARLOC_CAR)):
+      fr = CDR(addr);
+      iframe = INUM(CAR(fr));
+      idist = INUM(CDR(fr));
+      break;
+    }
+  }
+  for (env = stenv; NIMP(env); env = CDR(env)) {
+    fr = CAR(env);
+    if (INUMP(fr)) {
+      ASSERT(NIMP(env) && CONSP(env), stenv, s_badenv, what);
+      env = CDR(env);
+      continue;
+    }
+    if (SCM_LINUMP(fr)) continue;
+    if (NIMP(fr) && CONSP(fr) && IMP(CAR(fr))) continue;
+    if (0==iframe--) {
+      while (idist--) {
+	if (IMP(fr) || NCONSP(fr)) return BOOL_F;
+	fr = CDR(fr);
+      }
+      if (!icdrp) {
+	if (NIMP(fr) && CONSP(fr))
+	  fr = CAR(fr);
+	else
+	  fr = BOOL_F;
+      }
+      if (NIMP(fr) && IDENTP(fr)) return fr;
+      return BOOL_F;
+    }
+  }
+  return BOOL_F;
+}
+
+SCM scm_env_addprop(prop, val, env)
+     SCM prop, val, env;
+{
+  if (UNBNDP(prop)) return env;
+  return cons2(prop, val, env);
+}
+
+SCM scm_env_getprop(prop, env)
+     SCM prop, env;
+{
+  SCM e = env;
+  if (!UNBNDP(prop)) {
+    while (NIMP(e)) {
+      if (INUMP(CAR(e))) {
+	if (CAR(e)==prop) return CDR(e);
+	e = CDR(e);
+	ASSERT(NIMP(e), env, s_badenv, "env_getprop");
+      }
+      e = CDR(e);
+    }
+  }
+  return BOOL_F;
+}
+
+static SCM prinhead(x, port, writing)
+     SCM x, port;
+     int writing;
+{
+  lputc('(', port);
+  iprin1(CAR(x), port, writing);
+  lputc(' ', port);
+  return CDR(x);
+}
+
+static void prinbindings(names, inits, init_env,
+			 steps, step_env, port, writing)
+     SCM names, inits, init_env, steps, step_env, port;
+     int writing;
+{
+  lputc('(', port);
+  while (NIMP(names) && NIMP(inits)) {
+    lputc('(', port);
+    iprin1(CAR(names), port, writing);
+    lputc(' ', port);
+    scm_princode(CAR(inits), init_env, port, writing);
+    if (NIMP(steps)) {
+      lputc(' ', port);
+      scm_princode(CAR(steps), step_env, port, writing);
+      steps = CDR(steps);
+    }
+    lputc(')', port);
+    names = CDR(names);
+    inits = CDR(inits);
+    if (NIMP(names)) lputc(' ', port);
+  }
+  lputs(") ", port);
+}
+
+void scm_princode(code, env, port, writing)
+     SCM code, env, port;
+     int writing;
+{
+  SCM oenv = env, name, init, bdgs, x = code;
+  if (UNBNDP(env)) {
+    iprin1(code, port, writing);
+    return;
+  }
+ tail:
+  if (IMP(x)) {
+    if (ILOCP(x)) {
+    local:
+      name = scm_env_rlookup(x, env, "princode");
+      if (FALSEP(name)) goto gencase;
+      lputs("#@", port);
+      iprin1(name, port, writing);
+      return;
+    }
+    else
+      goto gencase;
+  }
+  if (SCM_GLOCP(x)) {
+    iprin1(x, port, writing);
+    return;
+  }
+  switch (TYP7(x)) {
+  default: gencase:
+    iprin1(x, port, writing);
+    return;
+  gencode:
+  case tcs_cons_gloc:
+  case tcs_cons_nimcar:
+  case tcs_cons_iloc:
+  case (127 & IM_OR): case (127 & IM_AND): case (127 & IM_BEGIN):
+  case (127 & IM_SET): case (127 & IM_COND): case (127 & IM_CASE):
+  case (127 & IM_IF):
+    lputc('(', port);
+    scm_princode(CAR(x), env, port, writing);
+  body:
+    x = CDR(x);
+  no_cdr:
+    for (; NNULLP(x); x = CDR(x)) {
+      if (IMP(x) || NECONSP(x)) {
+	lputs(" . ", port);
+	iprin1(x, port, writing);
+	break;
+      }
+      lputc(' ', port);
+      scm_princode(CAR(x), env, port, writing);
+    }
+    lputc(')', port);
+    return;
+  case (127 & IM_LAMBDA):
+    x = prinhead(x, port, writing);
+    env = CAR(x);
+    bdgs = SCM_ENV_FORMALS(env);
+    if (IMP(bdgs) || NECONSP(bdgs))
+      iprin1(bdgs, port, writing);
+    else {
+      lputc('(', port);
+      while (!0) {
+	if (NECONSP(bdgs)) break;
+	iprin1(CAR(bdgs), port, writing);
+	if (NIMP(bdgs = CDR(bdgs)))
+	  lputc(' ', port);
+	else break;
+      }
+      if (NIMP(bdgs)) {
+	lputs(". ", port);
+	iprin1(bdgs, port, writing);
+      }
+      lputc(')', port);
+    }
+    goto body;
+  case (127 & IM_LETREC):
+  case (127 & IM_LET):
+    x = prinhead(x, port, writing);
+    env = CAR(x);
+    prinbindings(SCM_ENV_FORMALS(env),
+		 CAR(CDR(x)), (TYP7(x)==(127 & IM_LET) ? oenv: env),
+		 UNDEFINED, UNDEFINED, port, writing);
+    x = CDR(x);
+    goto body;
+  case (127 & IM_LETSTAR):
+    x = prinhead(x, port, writing);
+    lputc('(', port);
+    if (NIMP(bdgs = CAR(x))) {
+      oenv = CAR(bdgs);
+      bdgs = CDR(bdgs);
+      while (!0) {
+	init = CAR(bdgs);
+	bdgs = CDR(bdgs);
+	env = CAR(bdgs);
+	lputc('(', port);
+	iprin1(SCM_ENV_FORMALS(env), port, writing);
+	lputc(' ', port);
+	scm_princode(init, oenv, port, writing);
+	oenv = env;
+	lputc(')', port);
+	if (IMP(bdgs = CDR(bdgs)))
+	  break;
+	lputc(' ', port);
+      }
+    }
+    lputs(") ", port);
+    goto body;
+  case (127 & IM_DO):
+    {
+      /* (#@do (env (init ...) (test ...) (body ...) step ...)) */
+      SCM test, steps;
+      x = prinhead(x, port, writing);
+      env = CAR(x);
+      x = CDR(x);
+      init = CAR(x);
+      x = CDR(x);
+      test = CAR(x);
+      x = CDR(x);
+      steps = CDR(x);
+      x = CAR(x);
+      prinbindings(SCM_ENV_FORMALS(env), init, oenv, steps, env,
+		   port, writing);
+      scm_princode(test, env, port, writing);
+      lputc(' ', port);
+      goto no_cdr;
+    }
+  case (127 & IM_FUNCALL):
+    lputc('(', port);
+    x = CDR(x);
+    scm_princode(CAR(x), env, port, writing);
+    goto body;
+  case (127 & MAKISYM(0)):
+    if (!ISYMP(CAR(x))) goto gencode;
+    switch (ISYMNUM(CAR(x))) {
+    default:
+      goto gencode;
+    case ISYMNUM(IM_LINUM):
+      x = CDR(x);
+      goto tail;
+    case ISYMNUM(IM_FARLOC_CAR):
+    case ISYMNUM(IM_FARLOC_CDR):
+      goto local;
+    }
+  }
+}
+
+void scm_princlosure(proc, port, writing)
+     SCM proc, port;
+     int writing;
+{
+  SCM env, linum = UNDEFINED;
+  proc = CODE(proc);
+  lputs("#<CLOSURE ", port);
+  env = CAR(proc);
+#ifdef CAUTIOUS
+  if (NIMP(env=scm_env_getprop(SCM_ENV_PROCNAME, env))) {
+    iprin1(CAR(env), port, 1);
+    lputc(' ', port);
+    env = CDR(env);
+    if (NIMP(env) && SCM_LINUMP(CAR(env)))
+      linum = CAR(env);
+  }
+  else
+    lputs("<anon> ", port);
+  env = CAR(proc);
+  if (NIMP(env=scm_env_getprop(SCM_ENV_FILENAME, env)))
+    scm_line_msg(CAR(env), linum, port);
+#endif
+  env = CAR(proc);
+  iprin1(SCM_ENV_FORMALS(env), port, writing);
+  if (writing) {
+    for(proc = CDR(proc); NIMP(proc); proc = CDR(proc)) {
+      lputc(' ', port);
+      scm_princode(CAR(proc), env, port, writing);
+    }
+  }
+  lputc('>', port);
+}
+
+static char s_int2linum[] = "integer->line-number";
+SCM scm_int2linum(n)
+     SCM n;
+{
+  int i = INUM(n);
+  ASSERT(INUMP(n) && i >= 0, n, ARG1, s_int2linum);
+  return SCM_MAKE_LINUM(i);
+}
+
+static char s_linum2int[] = "line-number->integer";
+SCM scm_linum2int(linum)
+     SCM linum;
+{
+  ASSERT(SCM_LINUMP(linum), linum, ARG1, s_linum2int);
+  return MAKINUM(SCM_LINUM(linum));
+}
+
+SCM scm_linump(obj)
+     SCM obj;
+{
+  return SCM_LINUMP(obj) ? BOOL_T : BOOL_F;
+}
+
+static char s_remove_linums[] = "remove-line-numbers!";
+SCM scm_remove_linums(x)
+     SCM x;
+{
+  SCM ret = x;
+  SCM *px = &ret;
+ tail:
+  x = *px;
+  if (IMP(x)) return ret;
+  if (CONSP(x)) {
+    if (SCM_LINUMP(CAR(x))) {
+      *px = CDR(x);
+      px = &CDR(x);
+      goto tail;
+    }
+    if (NIMP(CAR(x)))
+      CAR(x) = scm_remove_linums(CAR(x));
+    px = &CDR(x);
+    goto tail;
+  }
+  else if (VECTORP(x)) {
+    SCM *ve = VELTS(x);
+    sizet i = LENGTH(x);
+    while (i--) {
+      if (NIMP(ve[i]))
+	ve[i] = scm_remove_linums(ve[i]);
+    }
+    return ret;
+  }
+  else
+    return ret;
+}
+
+#ifdef CAUTIOUS
+long num_frames(estk, i)
+     SCM estk;
+     int i;
+{
+  long n = 0;
+  while NIMP(estk) {
+    n += (i - SCM_ESTK_BASE)/SCM_ESTK_FRLEN;
+    i = INUM(SCM_ESTK_PARENT_INDEX(estk));
+    estk = SCM_ESTK_PARENT(estk);
+  }
+  return n;
+}
+
+SCM *estk_frame(estk, i, nf)
+     SCM estk;
+     int i, nf;
+{
+  int n;
+  /* Make this 1-based, because continuations have an extra frame at
+     the top of the estk. */
+  nf -= 1;
+  while NIMP(estk) {
+    n = (i - SCM_ESTK_BASE)/SCM_ESTK_FRLEN;
+    if (nf <= n) return &(VELTS(estk)[i - nf*SCM_ESTK_FRLEN]);
+    nf -= n;
+    i = INUM(SCM_ESTK_PARENT_INDEX(estk));
+    estk = SCM_ESTK_PARENT(estk);
+  }
+  return (SCM *)0;
+}
+
+SCM stacktrace1(estk, i)
+     SCM estk;
+     int i;
+{
+  SCM *frame, env, ste, lste = UNDEFINED;
+  int n, nf = num_frames(estk, i);
+  int nbrk1 = 7, nbrk2 = nf - 6;
+  if (nf <= 0) return BOOL_F;
+  lputs("\n;STACK TRACE", cur_errp);
+  for (n = 1; n <= nf; n++) {
+    if ((0 <= nbrk1--) || n >= nbrk2) {
+      if (!(frame = estk_frame(estk, i, n))) continue;
+      if (BOOL_F==(ste = frame[3])) continue;
+      env = frame[2];
+      if (ste != lste) {
+	lste = ste;
+	if (reset_safeport(sys_safep, 65, cur_errp)) {
+	  /* The usual C setjmp, not SCM's setjump. */
+	  if (0==setjmp(SAFEP_JMPBUF(sys_safep))) {
+	    lputc('\n', cur_errp);
+	    intprint((long)n, -10, sys_safep);
+	    lputs("; ", sys_safep);
+	    scm_princode(ste, env, sys_safep, 1);
+	  }
+	}
+      }
+      else {
+	lputs("\n...", cur_errp);
+	break;
+      }
+    }
+  }
+  lputc('\n', cur_errp);
+  return BOOL_T;
+}
+
+SCM *cont_frame(contin, nf)
+     SCM contin;
+     int nf;
+{
+  CONTINUATION *cont = CONT(contin);
+  SCM estk = cont->other.estk;
+  int i = LENGTH(estk) - SCM_ESTK_FRLEN;
+  if (0 == nf) return cont->other.stkframe;
+  return estk_frame(estk, i, nf);
+}
+
+static char s_stack_trace[] = "stack-trace";
+SCM scm_stack_trace(contin)
+     SCM contin;
+{
+  SCM estk;
+  int i;
+  if (UNBNDP(contin)) {
+    estk = scm_estk;
+    i = (scm_estk_ptr - VELTS(scm_estk));
+  }
+  else {
+    CONTINUATION *cont;
+    ASSERT(NIMP(contin) && (tc7_contin==TYP7(contin)), contin, ARG1,
+	   s_stack_trace);
+    cont = CONT(contin);
+    estk = cont->other.estk;
+    i = LENGTH(estk) - SCM_ESTK_FRLEN;
+  }
+  return stacktrace1(estk, i);
+}
+
+static char s_frame_trace[] = "frame-trace";
+SCM scm_frame_trace(contin, nf)
+     SCM contin, nf;
+{
+    SCM *stkframe, code, env;
+    ASSERT(NIMP(contin) && tc7_contin==TYP7(contin), contin, ARG1,
+	   s_frame_trace);
+    ASSERT(INUMP(nf) && INUM(nf) >= 0, nf, ARG2, s_frame_trace);
+    if (!(stkframe = cont_frame(contin, INUM(nf))))
+      return BOOL_F;
+    env = stkframe[2];
+    code = stkframe[3];
+    scm_princode(code, env, cur_errp, 1);
+    scm_scope_trace(env);
+    return UNSPECIFIED;
+}
+
+static char s_frame2env[] = "frame->environment";
+SCM scm_frame2env(contin, nf)
+     SCM contin, nf;
+{
+    SCM *stkframe;
+    ASSERT(NIMP(contin) && tc7_contin==TYP7(contin), contin, ARG1,
+	   s_frame2env);
+    ASSERT(INUMP(nf) && INUM(nf) >= 0, nf, ARG2, s_frame2env);
+    if (!(stkframe = cont_frame(contin, INUM(nf))))
+      return BOOL_F;
+    return stkframe[2];
+}
+
+static char s_frame_eval[] = "frame-eval";
+SCM scm_frame_eval(contin, nf, expr)
+     SCM contin, nf, expr;
+{
+    SCM res, env, *stkframe;
+    ASSERT(NIMP(contin) && tc7_contin==TYP7(contin), contin, ARG1,
+	   s_frame_eval);
+    ASSERT(INUMP(nf) && INUM(nf) >= 0, nf, ARG2, s_frame_eval);
+    if (!(stkframe = cont_frame(contin, INUM(nf))))
+      return BOOL_F;
+    env = stkframe[2];
+    if (IMP(expr)) return expr;
+    DEFER_INTS_EGC;
+    res = ceval(expr, env, stkframe[0]);
+    ALLOW_INTS_EGC;
+    return res;
+}
+
+#endif
+
+static char s_scope_trace[] = "scope-trace";
+SCM scm_scope_trace(env)
+     SCM env;
+{
+  SCM ef, file = UNDEFINED;
+  int fprinted = 0;
+  if (UNBNDP(env))
+    env = scm_current_env();
+  else if (NIMP(env) && CLOSUREP(env))
+    env = CAR(CODE(env));
+  if (scm_nullenv_p(env))
+    lputs("\n; in top level environment.", cur_errp);
+  else
+    lputs("\n; in scope:", cur_errp);
+#ifdef CAUTIOUS
+  if (NIMP(ef=scm_env_getprop(SCM_ENV_FILENAME, env))) {
+    file = CAR(ef);
+  }
+#endif
+  for (; NIMP(env); env = CDR(env)) {
+    if (NCONSP(env)) {
+    badenv:
+      lputs("\n; corrupted environment ", cur_errp);
+      iprin1(env, cur_errp, 1);
+      return UNSPECIFIED;
+    }
+    ef = CAR(env);
+    if (SCM_LINUMP(ef)) {
+      lputs("\n;   ", cur_errp);
+      scm_line_msg(file, ef, cur_errp);
+      fprinted++;
+    }
+    else if (INUMP(ef)) {
+      ASRTGO(NIMP(env) && CONSP(env), badenv);
+      env = CDR(env);
+#ifdef CAUTIOUS
+      switch (ef) {
+      default: break;
+      case SCM_ENV_PROCNAME:
+	lputs("  procedure ", cur_errp);
+	iprin1(CAR(env), cur_errp, 1);
+	break;
+      }
+#endif
+    }
+    else if (NIMP(ef) && CONSP(ef) && NIMP(CAR(ef)) && CONSP(CAR(ef))) {
+      lputs("\n;   ", cur_errp);
+      iprin1(CAR(ef), cur_errp, 1);
+      lputs("  syntax bindings", cur_errp);
+    }
+    else {
+      lputs("\n;   ", cur_errp);
+      iprin1(ef, cur_errp, 1);
+    }
+  }
+#ifdef CAUTIOUS
+  if (NIMP(file) && !fprinted) {
+    lputs("\n; defined by ", cur_errp);
+    if (NIMP(file) && STRINGP(file))
+      lputs("load: ", cur_errp);
+    iprin1(file, cur_errp, 1);
+    lputc('\n', cur_errp);
+  }
+#endif
+  return UNSPECIFIED;
+}
+
+static char s_env_annotation[] = "environment-annotation";
+SCM scm_env_annotation(var, stenv)
+     SCM var, stenv;
+{
+  SCM s, frame, env = stenv;
+#ifdef MACRO
+  SCM mark = IDENT_ENV(var);
+  if (NIMP(mark)) mark = CAR(mark);
+#endif
+  for (; NIMP(env); env = CDR(env)) {
+    frame = CAR(env);
+#ifdef MACRO
+    if (frame==mark) {
+      var = IDENT_PARENT(var);
+      mark = IDENT_ENV(var);
+      if (NIMP(mark)) mark = CAR(mark);
+    }
+#endif
+    if (IMP(frame)) {
+      if (INUMP(frame)) {
+#ifndef RECKLESS
+	if (!(NIMP(env) && CONSP(env))) {
+	badenv: wta(stenv, s_badenv, s_env_annotation);
+	}
+#endif
+	env = CDR(env);
+      }
+      continue;
+    }
+#ifdef MACRO
+    if (NIMP(frame) && CONSP(frame) && BOOL_F==CAR(frame)) {
+      /* syntax binding */
+      s = assq(var, CDR(frame));
+      if (NIMP(s)) goto local_out;
+      continue;
+    }
+#endif
+    for (; NIMP(frame); frame = CDR(frame)) {
+      if (NCONSP(frame)) {
+	if (var==frame)
+	  goto local_out;
+	break;
+      }
+      if (CAR(frame)==var) {
+      local_out:
+	env = CDR(env);
+	if (IMP(env)) return BOOL_T;
+	if (SCM_ENV_ANNOTATION != CAR(env)) return BOOL_T;
+	env = CDR(env);
+	ASRTGO(NIMP(env), badenv);
+	s = assq(var, CAR(env));
+	if (NIMP(s)) return s;
+	return BOOL_T;
+      }
+      ASRTGO(CONSP(frame), badenv);
+    }
+  }
+  ASRTGO(NULLP(env), badenv);
+  return BOOL_F;
+}
+
+/* This is to be used for code backpointers to go into environments,
+   allowing run-time reporting of error line numbers. */
+SCM scm_wrapcode(code, env)
+     SCM code, env;
+{
+  SCM z, x = cons(env, code);
+  NEWCELL(z);
+  CDR(z) = x;
+  CAR(z) = tc16_codeptr;
+  return z;
+}
+
+static int princodeptr(exp, port, writing)
+     SCM exp;
+     SCM port;
+     int writing;
+{
+  SCM env = CAR(CDR(exp));
+  lputs("#<code ", port);
+  exp = CDR(CDR(exp));
+  if (IMP(exp) || NCONSP(exp))
+    scm_princode(exp, env, port, writing);
+  else {
+    while (!0) {
+      if (IMP(exp) || NCONSP(exp)) break;
+      scm_princode(CAR(exp), env, port, writing);
+      lputc(' ', port);
+      exp = CDR(exp);
+    }
+    if (NNULLP(exp)) {
+      lputs(" . ", port);
+      scm_princode(exp, env, port, writing);
+    }
+  }
+  lputc('>', port);
+  return !0;
+}
+
+static smobfuns codesmob = {markcdr, free0, princodeptr};
+
+static iproc subr1os[] = {
+  {s_scope_trace, scm_scope_trace},
+#ifdef CAUTIOUS
+  {s_stack_trace, scm_stack_trace},
+#endif
+	{0, 0}};
+
+static iproc subr1s[] = {
+  {s_int2linum, scm_int2linum},
+  {"line-number?", scm_linump},
+  {s_linum2int, scm_linum2int},
+  {s_remove_linums, scm_remove_linums},
+  {0, 0}};
+
+static iproc subr2s[] = {
+  {s_env_annotation, scm_env_annotation},
+#ifdef CAUTIOUS
+  {s_frame_trace, scm_frame_trace},
+  {s_frame2env, scm_frame2env},
+#endif
+  {0, 0}};
+
+void init_debug()
+{
+  tc16_codeptr = newsmob(&codesmob);
+  init_iprocs(subr1os, tc7_subr_1o);
+  init_iprocs(subr1s, tc7_subr_1);
+  init_iprocs(subr2s, tc7_subr_2);
+#ifdef CAUTIOUS
+  make_subr(s_frame_eval, tc7_subr_3, scm_frame_eval);
+#endif
+}