/usr/src/gnu/usr.bin/binutils/gdb/f-typeprint.c

Bug Summary

File:	src/gnu/usr.bin/binutils/gdb/f-typeprint.c
Warning:	line 86, column 30 Null pointer passed as 1st argument to string length function

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name f-typeprint.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/binutils/obj/gdb -resource-dir /usr/local/lib/clang/13.0.0 -D PIE_DEFAULT=1 -I . -I /usr/src/gnu/usr.bin/binutils/gdb -I /usr/src/gnu/usr.bin/binutils/gdb/config -D LOCALEDIR="/usr/share/locale" -D HAVE_CONFIG_H -I /usr/src/gnu/usr.bin/binutils/gdb/../include/opcode -I ../bfd -I /usr/src/gnu/usr.bin/binutils/gdb/../bfd -I /usr/src/gnu/usr.bin/binutils/gdb/../include -I ../intl -I /usr/src/gnu/usr.bin/binutils/gdb/../intl -D MI_OUT=1 -D TUI=1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/gnu/usr.bin/binutils/obj/gdb -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -fcommon -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/gnu/usr.bin/binutils/gdb/f-typeprint.c

1/* Support for printing Fortran types for GDB, the GNU debugger.

 Copyright 1986, 1988, 1989, 1991, 1993, 1994, 1995, 1996, 1998,
 2000, 2001, 2002, 2003 Free Software Foundation, Inc.

 Contributed by Motorola.  Adapted from the C version by Farooq Butt
 (fmbutt@engage.sps.mot.com).

 This file is part of GDB.

 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 of the License, 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 program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */

26#include "defs.h"
27#include "gdb_obstack.h"
28#include "bfd.h"
29#include "symtab.h"
30#include "gdbtypes.h"
31#include "expression.h"
32#include "value.h"
33#include "gdbcore.h"
34#include "target.h"
35#include "f-lang.h"

37#include "gdb_string.h"
38#include <errno(*__errno()).h>

40#if 0				/* Currently unused */
41static void f_type_print_args (struct type *, struct ui_file *);
42#endif

44static void print_equivalent_f77_float_type (struct type *,
			     struct ui_file *);

47static void f_type_print_varspec_suffix (struct type *, struct ui_file *,
			 int, int, int);

50void f_type_print_varspec_prefix (struct type *, struct ui_file *,
		  int, int);

53void f_type_print_base (struct type *, struct ui_file *, int, int);
54

56/* LEVEL is the depth to indent lines by.  */

58void
59f_print_type (struct type *type, char *varstring, struct ui_file *stream,
     int show, int level)
61{
enum type_code code;
int demangled_args;

f_type_print_base (type, stream, show, level);
code = TYPE_CODE (type)(type)->main_type->code;
if ((varstring != NULL((void*)0) && *varstring != '\0')
1
Assuming 'varstring' is equal to NULL→
    ||
/* Need a space if going to print stars or brackets;
   but not if we will print just a type name.  */
    ((show1.1
'show' is > 0
 > 0 || TYPE_NAME (type)(type)->main_type->name == 0)
     &&
     (code == TYPE_CODE_PTR || code == TYPE_CODE_FUNC
2
←
Assuming 'code' is equal to TYPE_CODE_PTR→
|| code == TYPE_CODE_METHOD
|| code == TYPE_CODE_ARRAY
|| code == TYPE_CODE_MEMBER
|| code == TYPE_CODE_REF)))
  fputs_filtered (" ", stream);
f_type_print_varspec_prefix (type, stream, show, 0);

fputs_filtered (varstring, stream);

/* For demangled function names, we have the arglist as part of the name,
   so don't print an additional pair of ()'s */

demangled_args = varstring[strlen (varstring) - 1] == ')';
3
←
Null pointer passed as 1st argument to string length function
f_type_print_varspec_suffix (type, stream, show, 0, demangled_args);
88}

90/* Print any asterisks or open-parentheses needed before the
 variable name (to describe its type).

 On outermost call, pass 0 for PASSED_A_PTR.
 On outermost call, SHOW > 0 means should ignore
 any typename for TYPE and show its details.
 SHOW is always zero on recursive calls.  */

98void
99f_type_print_varspec_prefix (struct type *type, struct ui_file *stream,
	     int show, int passed_a_ptr)
101{
if (type == 0)
  return;

if (TYPE_NAME (type)(type)->main_type->name && show <= 0)
  return;

QUIT{ if (quit_flag) quit (); if (deprecated_interactive_hook) deprecated_interactive_hook
 (); };

switch (TYPE_CODE (type)(type)->main_type->code)
  {
  case TYPE_CODE_PTR:
    f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, 1);
    break;

  case TYPE_CODE_FUNC:
    f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, 0);
    if (passed_a_ptr)
fprintf_filtered (stream, "(");
    break;

  case TYPE_CODE_ARRAY:
    f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, 0);
    break;

  case TYPE_CODE_UNDEF:
  case TYPE_CODE_STRUCT:
  case TYPE_CODE_UNION:
  case TYPE_CODE_ENUM:
  case TYPE_CODE_INT:
  case TYPE_CODE_FLT:
  case TYPE_CODE_VOID:
  case TYPE_CODE_ERROR:
  case TYPE_CODE_CHAR:
  case TYPE_CODE_BOOL:
  case TYPE_CODE_SET:
  case TYPE_CODE_RANGE:
  case TYPE_CODE_STRING:
  case TYPE_CODE_BITSTRING:
  case TYPE_CODE_METHOD:
  case TYPE_CODE_MEMBER:
  case TYPE_CODE_REF:
  case TYPE_CODE_COMPLEX:
  case TYPE_CODE_TYPEDEF:
    /* These types need no prefix.  They are listed here so that
       gcc -Wall will reveal any types that haven't been handled.  */
    break;
  }
149}

151/* Print any array sizes, function arguments or close parentheses
 needed after the variable name (to describe its type).
 Args work like c_type_print_varspec_prefix.  */

155static void
156f_type_print_varspec_suffix (struct type *type, struct ui_file *stream,
	     int show, int passed_a_ptr, int demangled_args)
158{
int upper_bound, lower_bound;
int lower_bound_was_default = 0;
static int arrayprint_recurse_level = 0;
int retcode;

if (type == 0)
  return;

if (TYPE_NAME (type)(type)->main_type->name && show <= 0)
  return;

QUIT{ if (quit_flag) quit (); if (deprecated_interactive_hook) deprecated_interactive_hook
 (); };

switch (TYPE_CODE (type)(type)->main_type->code)
  {
  case TYPE_CODE_ARRAY:
    arrayprint_recurse_level++;

    if (arrayprint_recurse_level == 1)
fprintf_filtered (stream, "(");

    if (TYPE_CODE (TYPE_TARGET_TYPE (type))((type)->main_type->target_type)->main_type->code == TYPE_CODE_ARRAY)
f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, 0, 0);

    retcode = f77_get_dynamic_lowerbound (type, &lower_bound);

    lower_bound_was_default = 0;

    if (retcode == BOUND_FETCH_ERROR-999)
fprintf_filtered (stream, "???");
    else if (lower_bound == 1)	/* The default */
lower_bound_was_default = 1;
    else
fprintf_filtered (stream, "%d", lower_bound);

    if (lower_bound_was_default)
lower_bound_was_default = 0;
    else
fprintf_filtered (stream, ":");

    /* Make sure that, if we have an assumed size array, we
       print out a warning and print the upperbound as '*' */

    if (TYPE_ARRAY_UPPER_BOUND_TYPE (type)(type)->main_type->upper_bound_type == BOUND_CANNOT_BE_DETERMINED)
fprintf_filtered (stream, "*");
    else
{
 retcode = f77_get_dynamic_upperbound (type, &upper_bound);

 if (retcode == BOUND_FETCH_ERROR-999)
   fprintf_filtered (stream, "???");
 else
   fprintf_filtered (stream, "%d", upper_bound);
}

    if (TYPE_CODE (TYPE_TARGET_TYPE (type))((type)->main_type->target_type)->main_type->code != TYPE_CODE_ARRAY)
f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, 0, 0);
    if (arrayprint_recurse_level == 1)
fprintf_filtered (stream, ")");
    else
fprintf_filtered (stream, ",");
    arrayprint_recurse_level--;
    break;

  case TYPE_CODE_PTR:
  case TYPE_CODE_REF:
    f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, 1, 0);
    fprintf_filtered (stream, ")");
    break;

  case TYPE_CODE_FUNC:
    f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0,
		   passed_a_ptr, 0);
    if (passed_a_ptr)
fprintf_filtered (stream, ")");

    fprintf_filtered (stream, "()");
    break;

  case TYPE_CODE_UNDEF:
  case TYPE_CODE_STRUCT:
  case TYPE_CODE_UNION:
  case TYPE_CODE_ENUM:
  case TYPE_CODE_INT:
  case TYPE_CODE_FLT:
  case TYPE_CODE_VOID:
  case TYPE_CODE_ERROR:
  case TYPE_CODE_CHAR:
  case TYPE_CODE_BOOL:
  case TYPE_CODE_SET:
  case TYPE_CODE_RANGE:
  case TYPE_CODE_STRING:
  case TYPE_CODE_BITSTRING:
  case TYPE_CODE_METHOD:
  case TYPE_CODE_MEMBER:
  case TYPE_CODE_COMPLEX:
  case TYPE_CODE_TYPEDEF:
    /* These types do not need a suffix.  They are listed so that
       gcc -Wall will report types that may not have been considered.  */
    break;
  }
260}

262static void
263print_equivalent_f77_float_type (struct type *type, struct ui_file *stream)
264{
/* Override type name "float" and make it the
   appropriate real. XLC stupidly outputs -12 as a type
   for real when it really should be outputting -18 */

fprintf_filtered (stream, "real*%d", TYPE_LENGTH (type)(type)->length);
270}

272/* Print the name of the type (or the ultimate pointer target,
 function value or array element), or the description of a
 structure or union.

 SHOW nonzero means don't print this type as just its name;
 show its real definition even if it has a name.
 SHOW zero means print just typename or struct tag if there is one
 SHOW negative means abbreviate structure elements.
 SHOW is decremented for printing of structure elements.

 LEVEL is the depth to indent by.
 We increase it for some recursive calls.  */

285void
286f_type_print_base (struct type *type, struct ui_file *stream, int show,
   int level)
288{
int retcode;
int upper_bound;

QUIT{ if (quit_flag) quit (); if (deprecated_interactive_hook) deprecated_interactive_hook
 (); };

wrap_here ("    ");
if (type == NULL((void*)0))
  {
    fputs_filtered ("<type unknown>", stream);
    return;
  }

/* When SHOW is zero or less, and there is a valid type name, then always
   just print the type name directly from the type. */

if ((show <= 0) && (TYPE_NAME (type)(type)->main_type->name != NULL((void*)0)))
  {
    if (TYPE_CODE (type)(type)->main_type->code == TYPE_CODE_FLT)
print_equivalent_f77_float_type (type, stream);
    else
fputs_filtered (TYPE_NAME (type)(type)->main_type->name, stream);
    return;
  }

if (TYPE_CODE (type)(type)->main_type->code != TYPE_CODE_TYPEDEF)
  CHECK_TYPEDEF (type)(type) = check_typedef (type);

switch (TYPE_CODE (type)(type)->main_type->code)
  {
  case TYPE_CODE_TYPEDEF:
    f_type_print_base (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, level);
    break;

  case TYPE_CODE_ARRAY:
  case TYPE_CODE_FUNC:
    f_type_print_base (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, show, level);
    break;

  case TYPE_CODE_PTR:
    fprintf_filtered (stream, "PTR TO -> ( ");
    f_type_print_base (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, level);
    break;

  case TYPE_CODE_REF:
    fprintf_filtered (stream, "REF TO -> ( ");
    f_type_print_base (TYPE_TARGET_TYPE (type)(type)->main_type->target_type, stream, 0, level);
    break;

  case TYPE_CODE_VOID:
    fprintf_filtered (stream, "VOID");
    break;

  case TYPE_CODE_UNDEF:
    fprintf_filtered (stream, "struct <unknown>");
    break;

  case TYPE_CODE_ERROR:
    fprintf_filtered (stream, "<unknown type>");
    break;

  case TYPE_CODE_RANGE:
    /* This should not occur */
    fprintf_filtered (stream, "<range type>");
    break;

  case TYPE_CODE_CHAR:
    /* Override name "char" and make it "character" */
    fprintf_filtered (stream, "character");
    break;

  case TYPE_CODE_INT:
    /* There may be some character types that attempt to come
       through as TYPE_CODE_INT since dbxstclass.h is so
       C-oriented, we must change these to "character" from "char".  */

    if (strcmp (TYPE_NAME (type)(type)->main_type->name, "char") == 0)
fprintf_filtered (stream, "character");
    else
goto default_case;
    break;

  case TYPE_CODE_COMPLEX:
    fprintf_filtered (stream, "complex*%d", TYPE_LENGTH (type)(type)->length);
    break;

  case TYPE_CODE_FLT:
    print_equivalent_f77_float_type (type, stream);
    break;

  case TYPE_CODE_STRING:
    /* Strings may have dynamic upperbounds (lengths) like arrays. */

    if (TYPE_ARRAY_UPPER_BOUND_TYPE (type)(type)->main_type->upper_bound_type == BOUND_CANNOT_BE_DETERMINED)
fprintf_filtered (stream, "character*(*)");
    else
{
 retcode = f77_get_dynamic_upperbound (type, &upper_bound);

 if (retcode == BOUND_FETCH_ERROR-999)
   fprintf_filtered (stream, "character*???");
 else
   fprintf_filtered (stream, "character*%d", upper_bound);
}
    break;

  default_case:
  default:
    /* Handle types not explicitly handled by the other cases,
       such as fundamental types.  For these, just print whatever
       the type name is, as recorded in the type itself.  If there
       is no type name, then complain. */
    if (TYPE_NAME (type)(type)->main_type->name != NULL((void*)0))
fputs_filtered (TYPE_NAME (type)(type)->main_type->name, stream);
    else
error ("Invalid type code (%d) in symbol table.", TYPE_CODE (type)(type)->main_type->code);
    break;
  }
406}