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/*

 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. Neither the name of The TenDRA Project nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific, prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS

 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * $Id$

 */

/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/* linux/diag_out.c */

/**********************************************************************

$Author: release $

$Date: 1998/03/27 09:47:50 $

$Revision: 1.2 $

$Log: diag_out.c,v $

 * Revision 1.2  1998/03/27  09:47:50  release

 * Changes for 4.1.2 release.

 *

 * Revision 1.1.1.1  1998/01/17  15:55:52  release

 * First version to be checked into rolling release.

 *

 * Revision 1.12  1997/04/02  10:33:21  pwe

 * diagnose pl_tests

 *

 * Revision 1.11  1997/03/24  12:43:26  pwe

 * outn int->long

 *

 * Revision 1.10  1996/10/29  14:55:32  pwe

 * correct linux/elf stabs for global variables

 *

 * Revision 1.9  1996/07/05  09:07:43  pwe

 * correct stabs enums

 *

 * Revision 1.8  1996/05/09  17:30:47  pwe

 * shift invalidate_dest, and stabs postlude

 *

 * Revision 1.7  1996/04/19  16:14:16  pwe

 * simplified use of global id = id, correcting linux call problem

 *

 * Revision 1.6  1996/03/13  13:43:26  pwe

 * diags for long long

 *

 * Revision 1.5  1996/02/08  13:45:29  pwe

 * Linux elf v aout option

 *

 * Revision 1.4  1995/12/20  11:13:54  pwe

 * stabs local variable scopes

 *

 * Revision 1.3  1995/11/30  10:19:43  pwe

 * diag struct struct

 *

 * Revision 1.2  1995/03/28  14:28:53  pwe

 * correct diagnose empty file

 *

 * Revision 1.1  1995/03/17  18:29:52  pwe

 * stabs diagnostics for solaris and linux

 *

**********************************************************************/

#include "config.h"

#include "common_types.h"

#include "basicread.h"

#include "out.h"

#include "machine.h"

#include "shapemacs.h"

#include "expmacs.h"

#include "tags.h"

#include "szs_als.h"

#include "diagglob.h"

#include "xalloc.h"

#include "exp.h"

#include "mark_scope.h"

#include "externs.h"

#ifdef NEWDIAGS

#include "codermacs.h"

#include "instr.h"

#endif

/*

    FORWARD DECLARATIONS

*/

static void stab_scope_open(long);

static void stab_scope_close(long);

static void stab_file(long, bool);

static void stab_local(diag_info *, int, exp);

static void stab_types(void);

/*

    DIAGNOSTICS FILE

*/

static FILE *dg_file;

static char *dg_file_name;

/*

    BASIC TYPE NUMBERS

*/

#define STAB_SCHAR	4

#define STAB_UCHAR	6

#define STAB_SSHRT	2

#define STAB_USHRT	3

#define STAB_SLONG	1

#define STAB_ULONG	8

#define STAB_FLOAT	10

#define STAB_DBL	11

#define STAB_LDBL	12

#define STAB_VOID	13

#define STAB_S64	14

#define STAB_U64	15

#define NO_STABS	16

/*

    80x86 register numbers

*/

#ifdef NEWDIAGS

static long reg_stabno[8] = {0, 2, 1, 3, 7, 6, 5, 4};

#endif

/*

    BASIC POINTERS

*/

static long stab_ptrs[NO_STABS] = {

    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

};

/*

    CURRENT TYPE NUMBER

*/

static long typeno;

/*

    SIZE OF LAST STAB TYPE OUTPUT

*/

static long last_type_sz = 0;

/*

    CURRENT LINE NUMBER AND FILE NUMBER

*/

long currentlno = -1;

long currentfile = -1;

/*

    ARRAY OF TYPE SIZES

*/

static long *type_sizes;

static int total_type_sizes = 0;

/*

    SETTING AND GETTING TYPE SIZES

*/

#define set_stab_size(i)	type_sizes[(i)] = last_type_sz

#define get_stab_size(i)	(type_sizes[(i)])

/*

    GET THE NEXT TYPE NUMBER

*/

static long

next_typen(void)

{

    if (typeno >= total_type_sizes) {

	int i, n = total_type_sizes, m = n + 100;

	type_sizes = (long *)xrealloc((void *)(CH type_sizes),

				      m * sizeof(long));

	for (i = n; i < m; i++) {

	    type_sizes[i] = 0;

	}

	total_type_sizes = m;

    }

    return(typeno++);

}

/*

    ARRAY OF FILE DESCRIPTORS

*/

static filename *fds = NULL;

static int szfds = 0;

static int nofds = 0;

/*

    ADD A NEW FILE TO THE ARRAY OF FILE DESCRIPTORS

*/

void

stab_collect_files(filename f)

{

    if (fds == NULL) {

	szfds += 10;

	fds = (filename *)xmalloc(szfds * sizeof(filename));

    } else if (nofds >= szfds) {

	szfds += 10;

	fds = (filename *)xrealloc((void *)(CH fds), szfds * sizeof(filename));

    }

    fds[nofds++] = f;

    return;

}

/*

    FIND THE FILE DESCRIPTOR CORRESPONDING TO A FILE NAME

*/

static long

find_file(char *f)

{

    long i;

    for (i = 0; i < nofds; i++) {

	if (strcmp(f, fds[i] ->file.ints.chars) == 0) {

	    return(i);

	}

    }

    return(0);

}

static int last_proc_cname;

static char *last_proc_pname;

static int in_proc = 0;

static void

out_procname(void)

{

  if (last_proc_cname == -1) {

    outs(last_proc_pname);

  } else {

    outs(local_prefix);

    outn((long)last_proc_cname);

  }

}

/*

    OUTPUT A FILE POSITION CONSTRUCT

*/

#define N_SLINE 0x44

#define N_DSLINE 0x46

#define N_BSLINE 0x48

#define N_LBRAC  0xc0

#define N_RBRAC  0xe0

static void

stabd(long findex, long lno, int seg)

{

    long i;

    if (findex == currentfile && lno == currentlno) {

	return;

    }

    stab_file(findex, 1);

    if (seg != 0) {		/* 0 suppresses always */

      if (seg < 0 && !linux_elf) {

	seg = - seg;

      }

      if (seg > 0) {		/* -ve line nos are put out in the stabs */

	i = next_lab();

	fprintf(dg_file, "%sL.%ld:\n", local_prefix, i);

	fprintf(dg_file, "\t.stabn\t0x%x,0,%ld,%sL.%ld",seg, lno, local_prefix,

		i);

	if (linux_elf && in_proc) {

	  outs("-");

	  out_procname();

	}

	outnl();

      }

    }

    currentlno = lno;

    return;

}

#ifdef NEWDIAGS

/*

    OUTPUT DIAGNOSTICS SURROUNDING CODE

*/

void

code_diag_info(diag_info *d, int proc_no, void(*mcode)(void *), void *args)

{

  if (d == nildiag) {

   (*mcode)(args);

    return;

  }

  switch (d->key) {

    case DIAG_INFO_SCOPE: {

	stab_scope_open(currentfile);

	stabd(currentfile,(long)(currentlno + 1), N_SLINE);

	code_diag_info(d->more, proc_no, mcode, args);

	stab_scope_close(currentfile);

	return;

    }

    case DIAG_INFO_SOURCE: {

	sourcemark *s = &d->data.source.beg;

	long f = find_file(s->file->file.ints.chars);

	stabd(f,(long)s->line_no.nat_val.small_nat ,N_SLINE);

	code_diag_info(d->more, proc_no, mcode, args);

	s = &d->data.source.end;

	f = find_file(s->file->file.ints.chars);

	stabd(f,(long)s->line_no.nat_val.small_nat ,N_SLINE);

	return;

    }

    case DIAG_INFO_ID: {

	exp acc = d -> data.id_scope.access;

	if (name(acc)!= hold_tag) {

	  failer("not hold_tag");

	}

	acc = son(acc);

	if (name(acc) == cont_tag && name(son(acc)) == name_tag &&

	    isvar(son(son(acc)))) {

	  acc = son(acc);

	}

	if ((name(acc) == name_tag && !isdiscarded(acc) &&

	     !isglob(son(acc))) || name(acc) == val_tag) {

	  stab_local(d, proc_no, acc);

	}

	code_diag_info(d->more, proc_no, mcode, args);

    }

  }

  return;

}

#else

/*

    OUTPUT INITIAL DIAGNOSTICS FOR A DIAGNOSE_TAG

*/

void

output_diag(diag_info *d, int proc_no, exp e)

{

  if (d->key == DIAG_INFO_SOURCE) {

    sourcemark *s = &d->data.source.beg;

    long f = find_file(s->file->file.ints.chars);

    stabd(f, (long)s->line_no.nat_val.small_nat, N_SLINE);

    return;

  }

  if (d->key == DIAG_INFO_ID) {

    exp acc = d->data.id_scope.access;

    if (isglob(son(acc)) || no(son(acc)) == 1) {

      return;

    }

    mark_scope(e);

    if (props(e) & 0x80) {

      stab_scope_open(currentfile);

      stabd(currentfile, (long)(currentlno + 1), N_SLINE);

    }

    stab_local(d, proc_no, acc);

    return;

  }

}

/*

    OUTPUT FINAL DIAGNOSTICS FOR A DIAGNOSE_TAG

*/

void

output_end_scope(diag_info *d, exp e)

{

    if (d->key == DIAG_INFO_SOURCE) {

	sourcemark *s = &d->data.source.end;

	long f = find_file(s->file->file.ints.chars);

	long lno = s->line_no.nat_val.small_nat;

	stabd(f, lno, N_SLINE);

	return;

    }

    if (d->key == DIAG_INFO_ID && props(e) & 0x80) {

	stab_scope_close(currentfile);

	return;

    }

    return;

}

#endif

/*

    INITIALISE DIAGNOSTICS

*/

void

out_diagnose_prelude(void)

{

    dg_file_name = tmpnam(NULL);

    dg_file = fopen(dg_file_name, "w");

    if (dg_file == NULL) {

	failer("Can't open temporary diagnostics file");

	exit(EXIT_FAILURE);

    }

    stab_types();

    return;

}

/*

    INITIALIZE DIAGNOSTICS

*/

void

init_stab_aux(void)

{

    int c;

    FILE *f;

    int i, j = -1;

    for (i = 0; i < nofds; i++) {

	char *s = fds[i]->file.ints.chars;

	int n = (int)strlen(s);

	if (n && s[n - 1]!= 'h') {

	    j = i;

	}

    }

    fclose(dg_file);

    dg_file = fpout;

    if (j >= 0) {

	fprintf(dg_file, "\t.file\t\"%s\"\n", fds[j] ->file.ints.chars);

    } else {

	fprintf(dg_file, "\t.file\t\"no_source_file\"\n");

    }

    stab_file((long)j, 0);

    f = fopen(dg_file_name, "r");

    if (f == NULL) {

	failer("Can't open temporary diagnostics file");

	exit(EXIT_FAILURE);

    }

    while (c = fgetc(f), c != EOF) {

	outc(c);

    }

    fclose(f);

    remove(dg_file_name);

    return;

}

void

out_diagnose_postlude(void)

{

    long i = next_lab();

    fprintf(dg_file, ".text\n");

    fprintf(dg_file, "%sL.%ld:\n", local_prefix, i);

    fprintf(dg_file, "\t.stabs\t\"\",0x64,0,0,%sL.%ld\n", local_prefix, i);

    return;

}

/*

    FIND THE STAB OF A SIMPLE SHAPE

*/

static long

out_sh_type(shape s)

{

    last_type_sz = shape_size(s);

    switch (name(s)) {

	case scharhd: return(STAB_SCHAR);

	case ucharhd: return(STAB_UCHAR);

	case swordhd: return(STAB_SSHRT);

	case uwordhd: return(STAB_USHRT);

	case slonghd: return(STAB_SLONG);

	case ulonghd: return(STAB_ULONG);

	case s64hd: return(STAB_S64);

	case u64hd: return(STAB_U64);

	case shrealhd: return(STAB_FLOAT);

	case realhd: return(STAB_DBL);

	case doublehd: return(STAB_LDBL);

    }

    return(STAB_VOID);

}

/*

    OUTPUT DIAGNOSTICS DIRECTIVE FOR A FILE

*/

static void

stab_file(long findex, bool internal)

{

    static long i = 0;

    if (findex == currentfile || findex < 0 || findex >= szfds) {

	return;

    }

    if (!internal) {

	/* source file */

	i = next_lab();

	fprintf(dg_file, "%sL.%ld:\n", local_prefix, i);

	fprintf(dg_file, "\t.stabs\t\"%s\",0x64,0,0,%sL.%ld\n",

		fds[findex]->file.ints.chars, local_prefix, i);

    } else {

	/* included file */

	fprintf(dg_file, "\t.stabs\t\"%s\",0x84,0,0,%sL.%ld\n",

		fds[findex]->file.ints.chars, local_prefix, i);

    }

    currentfile = findex;

    return;

}

/*

    ARRAY OF DIAGNOSTIC SCOPES

*/

static long open_label = 0;

static long bracket_level = 0;

/*

    START OF A DIAGNOSTICS SCOPE

*/

static void

stab_scope_open(long findex)

{

    long i;

    stab_file(findex, 1);

    if (open_label != 0) {

	fprintf(dg_file, "\t.stabn\t0x%x,0,%ld,%sL.%ld\n", N_LBRAC,

		bracket_level, local_prefix, open_label);

    }

    i = next_lab();

    fprintf(dg_file, "%sL.%ld:\n", local_prefix, i);

    bracket_level++;

    open_label = i;

    return;

}

/*

    END OF A DIAGNOSTICS SCOPE

*/

static void

stab_scope_close(long findex)

{

    long i;

    if (open_label != 0) {

	fprintf(dg_file, "\t.stabn\t0x%x,0,%ld,%sL.%ld\n", N_LBRAC,

		bracket_level, local_prefix, open_label);

	open_label = 0;

    }

    i = next_lab();

    fprintf(dg_file, "%sL.%ld:\n", local_prefix, i);

    fprintf(dg_file, "\t.stabn\t0x%x,0,%ld,%sL.%ld\n", N_RBRAC,

	    bracket_level, local_prefix, i);

    bracket_level--;

    return;

}

/*

    DEPTH COUNT FOR STAB TYPES

*/

static int max_depth = 64;

static int depth_now = 0;

/*

    OUTPUT A DIAGNOSTICS TYPE

*/

#define OUT_DT_SHAPE(dt)	out_dt_shape((depth_now = 0, dt))

static void

out_dt_shape(diag_type dt)

{

    if (dt->been_outed) {

	fprintf(dg_file, "%d",(int)dt->been_outed);

	last_type_sz = get_stab_size(dt->been_outed);

	return;

    }

    /* SunOS as(1) rejects stab lines >2k so reduce size arbitrarily */

    if (depth_now >= max_depth) {

	fprintf(dg_file, "%d", STAB_SLONG);

	return;

    }

    depth_now++;

    switch (dt->key) {

	case DIAG_TYPE_PTR: {

	    long non;

	    diag_type pdt = dt->data.ptr.object;

	    if (pdt->key == DIAG_TYPE_VARIETY) {

		long pn = out_sh_type(f_integer(pdt->data.var));

		non = stab_ptrs[pn];

		if (non == 0) {

		    non = next_typen();

		    stab_ptrs[pn] = non;

		    fprintf(dg_file, "%ld=*%ld", non, pn);

		} else {

		    fprintf(dg_file, "%ld", non);

		}

	    } else {

		non = next_typen();

		fprintf(dg_file, "%ld=*", non);

		out_dt_shape(dt->data.ptr.object);

	    }

	    dt->been_outed = non;

	    last_type_sz = 32;

	    set_stab_size(non);

	    break;

	}

	case DIAG_TYPE_ARRAY: {

#if 0

	    long str = no(dt->data.array.stride);

#endif

	    long lwb = no(dt->data.array.lower_b);

	    long upb = no(dt->data.array.upper_b);

	    diag_type index_type = dt->data.array.index_type;

	    diag_type element_type = dt->data.array.element_type;

	    long non = next_typen();

	    dt->been_outed = non;

	    fprintf(dg_file, "%ld=ar", non);

	    out_dt_shape(index_type);

	    fprintf(dg_file, ";%ld;%ld;", lwb, upb);

	    out_dt_shape(element_type);

	    last_type_sz *= (upb - lwb + 1);

	    set_stab_size(non);

	    break;

	}

	case DIAG_TYPE_STRUCT:

	case DIAG_TYPE_UNION: {

	    int i;

	    char su;

	    shape s;

	    diag_field_list fields;

	    long non = next_typen();

	    dt->been_outed = non;

	    if (dt->key == DIAG_TYPE_STRUCT) {

		fields = dt->data.t_struct.fields;

		s = dt->data.t_struct.tdf_shape;

		su = 's';

	    } else {

		fields = dt->data.t_union.fields;

		s = dt->data.t_union.tdf_shape;

		su = 'u';

	    }

	    fprintf(dg_file, "%ld=%c%d", non, su, shape_size(s) / 8);

	    for (i = fields->lastused - 1; i >= 0; i--) {

		diag_field sf = (fields->array)[i];

		long offset = no(sf->where);

		if (depth_now >= max_depth) {

		    return;

		}

		depth_now++;

		fprintf(dg_file, "%s:", sf->field_name.ints.chars);

		out_dt_shape(sf->field_type);

		fprintf(dg_file, ",%ld,%ld;", offset, last_type_sz);

	    }

	    fprintf(dg_file, ";");

	    last_type_sz = shape_size(s);

	    set_stab_size(non);

	    break;

	}

	case DIAG_TYPE_VARIETY: {

	    dt->been_outed = out_sh_type(f_integer(dt->data.var));

	    fprintf(dg_file, "%ld", dt->been_outed);

	    break;

	}

	case DIAG_TYPE_PROC: {

	    diag_type result_type = dt->data.proc.result_type;

	    long non1 = next_typen();

	    long non2 = next_typen();

	    dt->been_outed = non1;

	    fprintf(dg_file, "%ld=*%ld=f", non1, non2);

	    out_dt_shape(result_type);

	    last_type_sz = 32;

	    set_stab_size(non1);

	    set_stab_size(non2);

	    break;

	}

	case DIAG_TYPE_LOC: {

	    /* +++ use qualifier which gives "const"/"volatile" */

	    out_dt_shape(dt->data.loc.object);

	    break;

	}

	case DIAG_TYPE_FLOAT: {

	    dt->been_outed = out_sh_type(f_floating(dt->data.f_var));

	    fprintf(dg_file, "%ld", dt->been_outed);

	    break;

	}

	case DIAG_TYPE_NULL: {

	    fprintf(dg_file, "%d", STAB_VOID);

	    last_type_sz = 0;

	    break;

	}

	case DIAG_TYPE_BITFIELD: {

	    long sz = dt->data.bitfield.no_of_bits.nat_val.small_nat;

	    fprintf(dg_file, "%d", STAB_SLONG);

	    last_type_sz = sz;

	    break;

	}

	case DIAG_TYPE_ENUM: {

	    int i;

	    enum_values_list enumvals = dt->data.t_enum.values;

	    long non = next_typen();

	    dt->been_outed = non;

	    fprintf(dg_file, "%ld=e", non);

	    for (i = enumvals->lastused - 1; i >= 0; i--) {

		enum_values ef = (enumvals->array)[i];

		fprintf(dg_file, "%s:%d,", ef->nme.ints.chars, no(ef->val));

	    }

	    fprintf(dg_file, ";");

	    last_type_sz = 32;

	    set_stab_size(non);

	    break;

	}

	default : {

	    fprintf(dg_file, "%d", STAB_VOID);

	    last_type_sz = 0;

	    break;

	}

    }

    return;

}

/*

    OUTPUT DIAGNOSTICS FOR A GLOBAL VARIABLE

*/

void

diag_val_begin(diag_global *d, int global, int cname, char *pname)

{

  stabd(find_file(d->data.id.whence.file->file.ints.chars),

	(long)d->data.id.whence.line_no.nat_val.small_nat, -N_DSLINE);

  fprintf(dg_file, "\t.stabs\t\"%s:%c", d->data.id.nme.ints.chars,

	  (global ? 'G' : 'S'));

  OUT_DT_SHAPE(d->data.id.new_type);

  if (global) {

    fprintf(dg_file, "\",0x20,0,%d,0\n",

	    d->data.id.whence.line_no.nat_val.small_nat);

  } else {

    fprintf(dg_file, "\",0x28,0,%d,",

	    d->data.id.whence.line_no.nat_val.small_nat);

    if (cname == -1) {

      outs(pname);

    } else {

      outs(local_prefix);

      outn((long)cname);

    }

    outnl();

  }

  return;

}