LCOV - code coverage report
Current view: top level - gcc/rust - rust-object-export.cc (source / functions) Coverage Total Hit
Test: gcc.info Lines: 29.8 % 47 14
Test Date: 2024-03-23 14:05:01 Functions: 50.0 % 4 2
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : /* Copyright (C) 2010-2024 Free Software Foundation, Inc.
       2                 :             : 
       3                 :             :    This file is part of GCC.
       4                 :             : 
       5                 :             :    GCC is free software; you can redistribute it and/or modify it under
       6                 :             :    the terms of the GNU General Public License as published by the Free
       7                 :             :    Software Foundation; either version 3, or (at your option) any later
       8                 :             :    version.
       9                 :             : 
      10                 :             :    GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      11                 :             :    WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12                 :             :    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      13                 :             :    for more details.
      14                 :             : 
      15                 :             :    You should have received a copy of the GNU General Public License
      16                 :             :    along with GCC; see the file COPYING3.  If not see
      17                 :             :    <http://www.gnu.org/licenses/>.  */
      18                 :             : 
      19                 :             : #include "rust-system.h"
      20                 :             : #include "coretypes.h"
      21                 :             : #include "target.h"
      22                 :             : #include "tree.h"
      23                 :             : #include "memmodel.h"
      24                 :             : #include "tm_p.h"
      25                 :             : #include "diagnostic.h"
      26                 :             : #include "simple-object.h"
      27                 :             : #include "stor-layout.h"
      28                 :             : #include "intl.h"
      29                 :             : #include "output.h" /* for assemble_string */
      30                 :             : #include "common/common-target.h"
      31                 :             : 
      32                 :             : // satisfy intellisense
      33                 :             : #include "options.h"
      34                 :             : 
      35                 :             : /* The segment name we pass to simple_object_start_read to find Rust
      36                 :             :    export data.  */
      37                 :             : 
      38                 :             : #ifndef RUST_EXPORT_SEGMENT_NAME
      39                 :             : #define RUST_EXPORT_SEGMENT_NAME "__GNU_RUST"
      40                 :             : #endif
      41                 :             : 
      42                 :             : /* The section name we use when reading and writing export data.  */
      43                 :             : 
      44                 :             : #ifndef RUST_EXPORT_SECTION_NAME
      45                 :             : #define RUST_EXPORT_SECTION_NAME ".rust_export"
      46                 :             : #endif
      47                 :             : 
      48                 :             : #ifndef TARGET_AIX_OS
      49                 :             : #define TARGET_AIX_OS 0
      50                 :             : #endif
      51                 :             : 
      52                 :             : /* Return whether or not GCC has reported any errors.  */
      53                 :             : 
      54                 :             : bool
      55                 :       48535 : saw_errors (void)
      56                 :             : {
      57                 :       48535 :   return errorcount != 0 || sorrycount != 0;
      58                 :             : }
      59                 :             : 
      60                 :             : /* Return the alignment in bytes of a struct field of type T.  */
      61                 :             : 
      62                 :             : unsigned int
      63                 :           0 : rust_field_alignment (tree t)
      64                 :             : {
      65                 :           0 :   unsigned int v;
      66                 :             : 
      67                 :           0 :   v = TYPE_ALIGN (t);
      68                 :             : 
      69                 :             : #ifdef BIGGEST_FIELD_ALIGNMENT
      70                 :             :   if (v > BIGGEST_FIELD_ALIGNMENT)
      71                 :             :     v = BIGGEST_FIELD_ALIGNMENT;
      72                 :             : #endif
      73                 :             : 
      74                 :             : #ifdef ADJUST_FIELD_ALIGN
      75                 :           0 :   v = ADJUST_FIELD_ALIGN (NULL_TREE, t, v);
      76                 :             : #endif
      77                 :             : 
      78                 :           0 :   return v / BITS_PER_UNIT;
      79                 :             : }
      80                 :             : 
      81                 :             : /* This is called by the Rust frontend proper to add data to the
      82                 :             :    section containing Rust export data.  */
      83                 :             : 
      84                 :             : void
      85                 :           0 : rust_write_export_data (const char *bytes, unsigned int size)
      86                 :             : {
      87                 :           0 :   static section *sec;
      88                 :             : 
      89                 :           0 :   if (sec == NULL)
      90                 :             :     {
      91                 :           0 :       gcc_assert (targetm_common.have_named_sections);
      92                 :           0 :       sec = get_section (RUST_EXPORT_SECTION_NAME,
      93                 :             :                          TARGET_AIX_OS ? SECTION_EXCLUDE : SECTION_DEBUG, NULL);
      94                 :             :     }
      95                 :             : 
      96                 :           0 :   switch_to_section (sec);
      97                 :           0 :   assemble_string (bytes, size);
      98                 :           0 : }
      99                 :             : 
     100                 :             : /* The rust_read_export_data function is called by the Rust frontend
     101                 :             :    proper to read Rust export data from an object file.  FD is a file
     102                 :             :    descriptor open for reading.  OFFSET is the offset within the file
     103                 :             :    where the object file starts; this will be 0 except when reading an
     104                 :             :    archive.  On success this returns NULL and sets *PBUF to a buffer
     105                 :             :    allocated using malloc, of size *PLEN, holding the export data.  If
     106                 :             :    the data is not found, this returns NULL and sets *PBUF to NULL and
     107                 :             :    *PLEN to 0.  If some error occurs, this returns an error message
     108                 :             :    and sets *PERR to an errno value or 0 if there is no relevant
     109                 :             :    errno.  */
     110                 :             : 
     111                 :             : const char *
     112                 :          16 : rust_read_export_data (int fd, off_t offset, char **pbuf, size_t *plen,
     113                 :             :                        int *perr)
     114                 :             : {
     115                 :          16 :   simple_object_read *sobj;
     116                 :          16 :   const char *errmsg;
     117                 :          16 :   off_t sec_offset;
     118                 :          16 :   off_t sec_length;
     119                 :          16 :   int found;
     120                 :          16 :   char *buf;
     121                 :          16 :   ssize_t c;
     122                 :             : 
     123                 :          16 :   *pbuf = NULL;
     124                 :          16 :   *plen = 0;
     125                 :             : 
     126                 :          16 :   sobj = simple_object_start_read (fd, offset, RUST_EXPORT_SEGMENT_NAME,
     127                 :             :                                    &errmsg, perr);
     128                 :          16 :   if (sobj == NULL)
     129                 :             :     {
     130                 :             :       /* If we get an error here, just pretend that we didn't find any
     131                 :             :          export data.  This is the right thing to do if the error is
     132                 :             :          that the file was not recognized as an object file.  This
     133                 :             :          will ignore file I/O errors, but it's not too big a deal
     134                 :             :          because we will wind up giving some other error later.  */
     135                 :             :       return NULL;
     136                 :             :     }
     137                 :             : 
     138                 :           0 :   found = simple_object_find_section (sobj, RUST_EXPORT_SECTION_NAME,
     139                 :             :                                       &sec_offset, &sec_length, &errmsg, perr);
     140                 :           0 :   simple_object_release_read (sobj);
     141                 :           0 :   if (!found)
     142                 :           0 :     return errmsg;
     143                 :             : 
     144                 :           0 :   if (lseek (fd, offset + sec_offset, SEEK_SET) < 0)
     145                 :             :     {
     146                 :           0 :       *perr = errno;
     147                 :           0 :       return _ ("lseek failed while reading export data");
     148                 :             :     }
     149                 :             : 
     150                 :           0 :   buf = XNEWVEC (char, sec_length);
     151                 :           0 :   if (buf == NULL)
     152                 :             :     {
     153                 :             :       *perr = errno;
     154                 :             :       return _ ("memory allocation failed while reading export data");
     155                 :             :     }
     156                 :             : 
     157                 :           0 :   c = read (fd, buf, sec_length);
     158                 :           0 :   if (c < 0)
     159                 :             :     {
     160                 :           0 :       *perr = errno;
     161                 :           0 :       free (buf);
     162                 :           0 :       return _ ("read failed while reading export data");
     163                 :             :     }
     164                 :             : 
     165                 :           0 :   if (c < sec_length)
     166                 :             :     {
     167                 :           0 :       free (buf);
     168                 :           0 :       return _ ("short read while reading export data");
     169                 :             :     }
     170                 :             : 
     171                 :           0 :   *pbuf = buf;
     172                 :           0 :   *plen = sec_length;
     173                 :             : 
     174                 :           0 :   return NULL;
     175                 :             : }
        

Generated by: LCOV version 2.0-1

LCOV profile is generated on x86_64 machine using following configure options: configure --disable-bootstrap --enable-coverage=opt --enable-languages=c,c++,fortran,go,jit,lto,rust,m2 --enable-host-shared. GCC test suite is run with the built compiler.