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gcc/libgfortran/intrinsics/stat.c
Janne Blomqvist 581d232670 PR 60324 Unbounded stack allocations in libgfortran. 
2014-11-13  Janne Blomqvist  <jb@gcc.gnu.org>

	PR libfortran/60324
	* configure: Regenerated.
	* configure.ac (AM_CFLAGS): Add Werror=vla.
	* libgfortran.h (gfc_alloca): Remove macro.
	(fc_strdup_notrim): New prototype.
	* intrinsics/access.c (access_func): Use fc_strdup rather than
	stack allocation.
	* intrinsics/chdir.c (chdir_i4_sub): Likewise.
	(chdir_i8_sub): Likewise.
	* intrinsics/chmod.c (chmod_internal): New function, move logic
	here.
	(chmod_func): Call chmod_internal.
	* intrinsics/env.c (getenv): Use fc_strdup rather than stack
	allocation.
	(get_environment_variable_i4): Likewise.
	* intrinsics/execute_command_line.c (execute_command_line):
	Likewise.
	* intrinsics/hostnm.c (hostnm_0): New function, use static buffer
	rather than VLA.
	(hostnm_i4_sub): Call hostnm_0.
	(hostnm_i8_sub): Likewise.
	(hostnm): Likewise.
	* intrinsics/link.c (link_internal): New function, use fc_strdup
	rather than stack allocation.
	(link_i4_sub): Call link_internal.
	(link_i8_sub): Likewise.
	(link_i4): Likewise.
	(link_i8): Likewise.
	* intrinsics/perror.c (perror_sub): Use fc_strdup rather than
	stack allocation.
	* intrinsics/random.c (random_seed_i4): Use static buffer rather
	than VLA, use _Static_assert to make sure it's big enough.
	* intrinsics/rename.c (rename_internal): New function, use
	fc_strdup rather than stack allocation.
	(rename_i4_sub): Call rename_internal.
	(rename_i8_sub): Likewise.
	(rename_i4): Likewise.
	(rename_i8): Likewise.
	* intrinsics/stat.c (stat_i4_sub_0): Use fc_strdup rather than
	stack allocation.
	(stat_i8_sub_0): Likewise.
	* intrinsics/symlink.c (symlnk_internal): New function, use
	fc_strdup rather than stack allocation.
	(symlnk_i4_sub): Call symlnk_internal.
	(symlnk_i8_sub): Likewise.
	(symlnk_i4): Likewise.
	(symlnk_i8): Likewise.
	* intrinsics/system.c (system_sub): Use fc_strdup rather than
	stack allocation.
	* intrinsics/unlink.c (unlink_i4_sub): Likewise.
	* io/file_pos.c (READ_CHUNK): Make it a macro rather than variable.
	* io/list_read.c (nml_get_obj_data): Use fixed stack buffer, fall
	back to xmalloc/free for large sizes.
	* io/read.c (read_f): Likewise.
	* io/transfer.c (MAX_READ): Make it a macro rather than variable.
	(WRITE_CHUNK): Likewise.
	* io/write_float.def (write_float): Use fixed stack buffer, fall
	back to xmalloc/free for large sizes.
	* runtime/string.c (fc_strdup_notrim): New function.

From-SVN: r217480
2014-11-13 14:05:01 +02:00

547 lines
14 KiB
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Raw Blame History

/* Implementation of the STAT and FSTAT intrinsics.
Copyright (C) 2004-2014 Free Software Foundation, Inc.
Contributed by Steven G. Kargl <kargls@comcast.net>.
This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran 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 3 of the License, or (at your option) any later version.
Libgfortran 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <string.h>
#include <errno.h>
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <stdlib.h>
#ifdef HAVE_STAT
/* SUBROUTINE STAT(FILE, SARRAY, STATUS)
CHARACTER(len=*), INTENT(IN) :: FILE
INTEGER, INTENT(OUT), :: SARRAY(13)
INTEGER, INTENT(OUT), OPTIONAL :: STATUS
FUNCTION STAT(FILE, SARRAY)
INTEGER STAT
CHARACTER(len=*), INTENT(IN) :: FILE
INTEGER, INTENT(OUT), :: SARRAY(13) */
/*extern void stat_i4_sub_0 (char *, gfc_array_i4 *, GFC_INTEGER_4 *,
gfc_charlen_type, int);
internal_proto(stat_i4_sub_0);*/
static void
stat_i4_sub_0 (char *name, gfc_array_i4 *sarray, GFC_INTEGER_4 *status,
gfc_charlen_type name_len, int is_lstat __attribute__ ((unused)))
{
int val;
char *str;
struct stat sb;
/* If the rank of the array is not 1, abort. */
if (GFC_DESCRIPTOR_RANK (sarray) != 1)
runtime_error ("Array rank of SARRAY is not 1.");
/* If the array is too small, abort. */
if (GFC_DESCRIPTOR_EXTENT(sarray,0) < 13)
runtime_error ("Array size of SARRAY is too small.");
/* Make a null terminated copy of the string. */
str = fc_strdup (name, name_len);
/* On platforms that don't provide lstat(), we use stat() instead. */
#ifdef HAVE_LSTAT
if (is_lstat)
val = lstat(str, &sb);
else
#endif
val = stat(str, &sb);
free (str);
if (val == 0)
{
index_type stride = GFC_DESCRIPTOR_STRIDE(sarray,0);
/* Device ID */
sarray->base_addr[0 * stride] = sb.st_dev;
/* Inode number */
sarray->base_addr[1 * stride] = sb.st_ino;
/* File mode */
sarray->base_addr[2 * stride] = sb.st_mode;
/* Number of (hard) links */
sarray->base_addr[3 * stride] = sb.st_nlink;
/* Owner's uid */
sarray->base_addr[4 * stride] = sb.st_uid;
/* Owner's gid */
sarray->base_addr[5 * stride] = sb.st_gid;
/* ID of device containing directory entry for file (0 if not available) */
#if HAVE_STRUCT_STAT_ST_RDEV
sarray->base_addr[6 * stride] = sb.st_rdev;
#else
sarray->base_addr[6 * stride] = 0;
#endif
/* File size (bytes) */
sarray->base_addr[7 * stride] = sb.st_size;
/* Last access time */
sarray->base_addr[8 * stride] = sb.st_atime;
/* Last modification time */
sarray->base_addr[9 * stride] = sb.st_mtime;
/* Last file status change time */
sarray->base_addr[10 * stride] = sb.st_ctime;
/* Preferred I/O block size (-1 if not available) */
#if HAVE_STRUCT_STAT_ST_BLKSIZE
sarray->base_addr[11 * stride] = sb.st_blksize;
#else
sarray->base_addr[11 * stride] = -1;
#endif
/* Number of blocks allocated (-1 if not available) */
#if HAVE_STRUCT_STAT_ST_BLOCKS
sarray->base_addr[12 * stride] = sb.st_blocks;
#else
sarray->base_addr[12 * stride] = -1;
#endif
}
if (status != NULL)
*status = (val == 0) ? 0 : errno;
}
extern void stat_i4_sub (char *, gfc_array_i4 *, GFC_INTEGER_4 *,
gfc_charlen_type);
iexport_proto(stat_i4_sub);
void
stat_i4_sub (char *name, gfc_array_i4 *sarray, GFC_INTEGER_4 *status,
gfc_charlen_type name_len)
{
stat_i4_sub_0 (name, sarray, status, name_len, 0);
}
iexport(stat_i4_sub);
extern void lstat_i4_sub (char *, gfc_array_i4 *, GFC_INTEGER_4 *,
gfc_charlen_type);
iexport_proto(lstat_i4_sub);
void
lstat_i4_sub (char *name, gfc_array_i4 *sarray, GFC_INTEGER_4 *status,
gfc_charlen_type name_len)
{
stat_i4_sub_0 (name, sarray, status, name_len, 1);
}
iexport(lstat_i4_sub);
static void
stat_i8_sub_0 (char *name, gfc_array_i8 *sarray, GFC_INTEGER_8 *status,
gfc_charlen_type name_len, int is_lstat __attribute__ ((unused)))
{
int val;
char *str;
struct stat sb;
/* If the rank of the array is not 1, abort. */
if (GFC_DESCRIPTOR_RANK (sarray) != 1)
runtime_error ("Array rank of SARRAY is not 1.");
/* If the array is too small, abort. */
if (GFC_DESCRIPTOR_EXTENT(sarray,0) < 13)
runtime_error ("Array size of SARRAY is too small.");
/* Make a null terminated copy of the string. */
str = fc_strdup (name, name_len);
/* On platforms that don't provide lstat(), we use stat() instead. */
#ifdef HAVE_LSTAT
if (is_lstat)
val = lstat(str, &sb);
else
#endif
val = stat(str, &sb);
free (str);
if (val == 0)
{
index_type stride = GFC_DESCRIPTOR_STRIDE(sarray,0);
/* Device ID */
sarray->base_addr[0] = sb.st_dev;
/* Inode number */
sarray->base_addr[stride] = sb.st_ino;
/* File mode */
sarray->base_addr[2 * stride] = sb.st_mode;
/* Number of (hard) links */
sarray->base_addr[3 * stride] = sb.st_nlink;
/* Owner's uid */
sarray->base_addr[4 * stride] = sb.st_uid;
/* Owner's gid */
sarray->base_addr[5 * stride] = sb.st_gid;
/* ID of device containing directory entry for file (0 if not available) */
#if HAVE_STRUCT_STAT_ST_RDEV
sarray->base_addr[6 * stride] = sb.st_rdev;
#else
sarray->base_addr[6 * stride] = 0;
#endif
/* File size (bytes) */
sarray->base_addr[7 * stride] = sb.st_size;
/* Last access time */
sarray->base_addr[8 * stride] = sb.st_atime;
/* Last modification time */
sarray->base_addr[9 * stride] = sb.st_mtime;
/* Last file status change time */
sarray->base_addr[10 * stride] = sb.st_ctime;
/* Preferred I/O block size (-1 if not available) */
#if HAVE_STRUCT_STAT_ST_BLKSIZE
sarray->base_addr[11 * stride] = sb.st_blksize;
#else
sarray->base_addr[11 * stride] = -1;
#endif
/* Number of blocks allocated (-1 if not available) */
#if HAVE_STRUCT_STAT_ST_BLOCKS
sarray->base_addr[12 * stride] = sb.st_blocks;
#else
sarray->base_addr[12 * stride] = -1;
#endif
}
if (status != NULL)
*status = (val == 0) ? 0 : errno;
}
extern void stat_i8_sub (char *, gfc_array_i8 *, GFC_INTEGER_8 *,
gfc_charlen_type);
iexport_proto(stat_i8_sub);
void
stat_i8_sub (char *name, gfc_array_i8 *sarray, GFC_INTEGER_8 *status,
gfc_charlen_type name_len)
{
stat_i8_sub_0 (name, sarray, status, name_len, 0);
}
iexport(stat_i8_sub);
extern void lstat_i8_sub (char *, gfc_array_i8 *, GFC_INTEGER_8 *,
gfc_charlen_type);
iexport_proto(lstat_i8_sub);
void
lstat_i8_sub (char *name, gfc_array_i8 *sarray, GFC_INTEGER_8 *status,
gfc_charlen_type name_len)
{
stat_i8_sub_0 (name, sarray, status, name_len, 1);
}
iexport(lstat_i8_sub);
extern GFC_INTEGER_4 stat_i4 (char *, gfc_array_i4 *, gfc_charlen_type);
export_proto(stat_i4);
GFC_INTEGER_4
stat_i4 (char *name, gfc_array_i4 *sarray, gfc_charlen_type name_len)
{
GFC_INTEGER_4 val;
stat_i4_sub (name, sarray, &val, name_len);
return val;
}
extern GFC_INTEGER_8 stat_i8 (char *, gfc_array_i8 *, gfc_charlen_type);
export_proto(stat_i8);
GFC_INTEGER_8
stat_i8 (char *name, gfc_array_i8 *sarray, gfc_charlen_type name_len)
{
GFC_INTEGER_8 val;
stat_i8_sub (name, sarray, &val, name_len);
return val;
}
/* SUBROUTINE LSTAT(FILE, SARRAY, STATUS)
CHARACTER(len=*), INTENT(IN) :: FILE
INTEGER, INTENT(OUT), :: SARRAY(13)
INTEGER, INTENT(OUT), OPTIONAL :: STATUS
FUNCTION LSTAT(FILE, SARRAY)
INTEGER LSTAT
CHARACTER(len=*), INTENT(IN) :: FILE
INTEGER, INTENT(OUT), :: SARRAY(13) */
extern GFC_INTEGER_4 lstat_i4 (char *, gfc_array_i4 *, gfc_charlen_type);
export_proto(lstat_i4);
GFC_INTEGER_4
lstat_i4 (char *name, gfc_array_i4 *sarray, gfc_charlen_type name_len)
{
GFC_INTEGER_4 val;
lstat_i4_sub (name, sarray, &val, name_len);
return val;
}
extern GFC_INTEGER_8 lstat_i8 (char *, gfc_array_i8 *, gfc_charlen_type);
export_proto(lstat_i8);
GFC_INTEGER_8
lstat_i8 (char *name, gfc_array_i8 *sarray, gfc_charlen_type name_len)
{
GFC_INTEGER_8 val;
lstat_i8_sub (name, sarray, &val, name_len);
return val;
}
#endif
#ifdef HAVE_FSTAT
/* SUBROUTINE FSTAT(UNIT, SARRAY, STATUS)
INTEGER, INTENT(IN) :: UNIT
INTEGER, INTENT(OUT) :: SARRAY(13)
INTEGER, INTENT(OUT), OPTIONAL :: STATUS
FUNCTION FSTAT(UNIT, SARRAY)
INTEGER FSTAT
INTEGER, INTENT(IN) :: UNIT
INTEGER, INTENT(OUT) :: SARRAY(13) */
extern void fstat_i4_sub (GFC_INTEGER_4 *, gfc_array_i4 *, GFC_INTEGER_4 *);
iexport_proto(fstat_i4_sub);
void
fstat_i4_sub (GFC_INTEGER_4 *unit, gfc_array_i4 *sarray, GFC_INTEGER_4 *status)
{
int val;
struct stat sb;
/* If the rank of the array is not 1, abort. */
if (GFC_DESCRIPTOR_RANK (sarray) != 1)
runtime_error ("Array rank of SARRAY is not 1.");
/* If the array is too small, abort. */
if (GFC_DESCRIPTOR_EXTENT(sarray,0) < 13)
runtime_error ("Array size of SARRAY is too small.");
/* Convert Fortran unit number to C file descriptor. */
val = unit_to_fd (*unit);
if (val >= 0)
val = fstat(val, &sb);
if (val == 0)
{
index_type stride = GFC_DESCRIPTOR_STRIDE(sarray,0);
/* Device ID */
sarray->base_addr[0 * stride] = sb.st_dev;
/* Inode number */
sarray->base_addr[1 * stride] = sb.st_ino;
/* File mode */
sarray->base_addr[2 * stride] = sb.st_mode;
/* Number of (hard) links */
sarray->base_addr[3 * stride] = sb.st_nlink;
/* Owner's uid */
sarray->base_addr[4 * stride] = sb.st_uid;
/* Owner's gid */
sarray->base_addr[5 * stride] = sb.st_gid;
/* ID of device containing directory entry for file (0 if not available) */
#if HAVE_STRUCT_STAT_ST_RDEV
sarray->base_addr[6 * stride] = sb.st_rdev;
#else
sarray->base_addr[6 * stride] = 0;
#endif
/* File size (bytes) */
sarray->base_addr[7 * stride] = sb.st_size;
/* Last access time */
sarray->base_addr[8 * stride] = sb.st_atime;
/* Last modification time */
sarray->base_addr[9 * stride] = sb.st_mtime;
/* Last file status change time */
sarray->base_addr[10 * stride] = sb.st_ctime;
/* Preferred I/O block size (-1 if not available) */
#if HAVE_STRUCT_STAT_ST_BLKSIZE
sarray->base_addr[11 * stride] = sb.st_blksize;
#else
sarray->base_addr[11 * stride] = -1;
#endif
/* Number of blocks allocated (-1 if not available) */
#if HAVE_STRUCT_STAT_ST_BLOCKS
sarray->base_addr[12 * stride] = sb.st_blocks;
#else
sarray->base_addr[12 * stride] = -1;
#endif
}
if (status != NULL)
*status = (val == 0) ? 0 : errno;
}
iexport(fstat_i4_sub);
extern void fstat_i8_sub (GFC_INTEGER_8 *, gfc_array_i8 *, GFC_INTEGER_8 *);
iexport_proto(fstat_i8_sub);
void
fstat_i8_sub (GFC_INTEGER_8 *unit, gfc_array_i8 *sarray, GFC_INTEGER_8 *status)
{
int val;
struct stat sb;
/* If the rank of the array is not 1, abort. */
if (GFC_DESCRIPTOR_RANK (sarray) != 1)
runtime_error ("Array rank of SARRAY is not 1.");
/* If the array is too small, abort. */
if (GFC_DESCRIPTOR_EXTENT(sarray,0) < 13)
runtime_error ("Array size of SARRAY is too small.");
/* Convert Fortran unit number to C file descriptor. */
val = unit_to_fd ((int) *unit);
if (val >= 0)
val = fstat(val, &sb);
if (val == 0)
{
index_type stride = GFC_DESCRIPTOR_STRIDE(sarray,0);
/* Device ID */
sarray->base_addr[0] = sb.st_dev;
/* Inode number */
sarray->base_addr[stride] = sb.st_ino;
/* File mode */
sarray->base_addr[2 * stride] = sb.st_mode;
/* Number of (hard) links */
sarray->base_addr[3 * stride] = sb.st_nlink;
/* Owner's uid */
sarray->base_addr[4 * stride] = sb.st_uid;
/* Owner's gid */
sarray->base_addr[5 * stride] = sb.st_gid;
/* ID of device containing directory entry for file (0 if not available) */
#if HAVE_STRUCT_STAT_ST_RDEV
sarray->base_addr[6 * stride] = sb.st_rdev;
#else
sarray->base_addr[6 * stride] = 0;
#endif
/* File size (bytes) */
sarray->base_addr[7 * stride] = sb.st_size;
/* Last access time */
sarray->base_addr[8 * stride] = sb.st_atime;
/* Last modification time */
sarray->base_addr[9 * stride] = sb.st_mtime;
/* Last file status change time */
sarray->base_addr[10 * stride] = sb.st_ctime;
/* Preferred I/O block size (-1 if not available) */
#if HAVE_STRUCT_STAT_ST_BLKSIZE
sarray->base_addr[11 * stride] = sb.st_blksize;
#else
sarray->base_addr[11 * stride] = -1;
#endif
/* Number of blocks allocated (-1 if not available) */
#if HAVE_STRUCT_STAT_ST_BLOCKS
sarray->base_addr[12 * stride] = sb.st_blocks;
#else
sarray->base_addr[12 * stride] = -1;
#endif
}
if (status != NULL)
*status = (val == 0) ? 0 : errno;
}
iexport(fstat_i8_sub);
extern GFC_INTEGER_4 fstat_i4 (GFC_INTEGER_4 *, gfc_array_i4 *);
export_proto(fstat_i4);
GFC_INTEGER_4
fstat_i4 (GFC_INTEGER_4 *unit, gfc_array_i4 *sarray)
{
GFC_INTEGER_4 val;
fstat_i4_sub (unit, sarray, &val);
return val;
}
extern GFC_INTEGER_8 fstat_i8 (GFC_INTEGER_8 *, gfc_array_i8 *);
export_proto(fstat_i8);
GFC_INTEGER_8
fstat_i8 (GFC_INTEGER_8 *unit, gfc_array_i8 *sarray)
{
GFC_INTEGER_8 val;
fstat_i8_sub (unit, sarray, &val);
return val;
}
#endif
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