LCOV - code coverage report
Current view: top level - gcc/diagnostics - file-cache.h (source / functions) Coverage Total Hit
Test: gcc.info Lines: 100.0 % 16 16
Test Date: 2025-09-20 13:40:47 Functions: 100.0 % 2 2
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : /* Caching input files for use by diagnostics.
       2                 :             :    Copyright (C) 2004-2025 Free Software Foundation, Inc.
       3                 :             : 
       4                 :             : This file is part of GCC.
       5                 :             : 
       6                 :             : GCC is free software; you can redistribute it and/or modify it under
       7                 :             : the terms of the GNU General Public License as published by the Free
       8                 :             : Software Foundation; either version 3, or (at your option) any later
       9                 :             : version.
      10                 :             : 
      11                 :             : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      12                 :             : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13                 :             : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      14                 :             : for more details.
      15                 :             : 
      16                 :             : You should have received a copy of the GNU General Public License
      17                 :             : along with GCC; see the file COPYING3.  If not see
      18                 :             : <http://www.gnu.org/licenses/>.  */
      19                 :             : 
      20                 :             : #ifndef GCC_DIAGNOSTICS_FILE_CACHE_H
      21                 :             : #define GCC_DIAGNOSTICS_FILE_CACHE_H
      22                 :             : 
      23                 :             : namespace diagnostics {
      24                 :             : 
      25                 :             : /* A class capturing the bounds of a buffer, to allow for run-time
      26                 :             :    bounds-checking in a checked build.  */
      27                 :             : 
      28                 :             : class char_span
      29                 :             : {
      30                 :             :  public:
      31                 :     1748072 :   char_span (const char *ptr, size_t n_elts) : m_ptr (ptr), m_n_elts (n_elts) {}
      32                 :             : 
      33                 :             :   /* Test for a non-NULL pointer.  */
      34                 :      976852 :   operator bool() const { return m_ptr; }
      35                 :             : 
      36                 :             :   /* Get length, not including any 0-terminator (which may not be,
      37                 :             :      in fact, present).  */
      38                 :      939445 :   size_t length () const { return m_n_elts; }
      39                 :             : 
      40                 :      734578 :   const char *get_buffer () const { return m_ptr; }
      41                 :             : 
      42                 :     3442653 :   char operator[] (int idx) const
      43                 :             :   {
      44                 :     3442653 :     gcc_assert (idx >= 0);
      45                 :     3442653 :     gcc_assert ((size_t)idx < m_n_elts);
      46                 :     3442653 :     return m_ptr[idx];
      47                 :             :   }
      48                 :             : 
      49                 :       38712 :   char_span subspan (int offset, int n_elts) const
      50                 :             :   {
      51                 :       38712 :     gcc_assert (offset >= 0);
      52                 :       38712 :     gcc_assert (offset < (int)m_n_elts);
      53                 :       38712 :     gcc_assert (n_elts >= 0);
      54                 :       38712 :     gcc_assert (offset + n_elts <= (int)m_n_elts);
      55                 :       38712 :     return char_span (m_ptr + offset, n_elts);
      56                 :             :   }
      57                 :             : 
      58                 :       37547 :   char *xstrdup () const
      59                 :             :   {
      60                 :       37547 :     return ::xstrndup (m_ptr, m_n_elts);
      61                 :             :   }
      62                 :             : 
      63                 :             :  private:
      64                 :             :   const char *m_ptr;
      65                 :             :   size_t m_n_elts;
      66                 :             : };
      67                 :             : 
      68                 :             : /* Forward decl of slot within file_cache, so that the definition doesn't
      69                 :             :    need to be in this header.  */
      70                 :             : class file_cache_slot;
      71                 :             : 
      72                 :             : /* A cache of source files for use when emitting diagnostics
      73                 :             :    (and in a few places in the C/C++ frontends).
      74                 :             : 
      75                 :             :    Results are only valid until the next call to the cache, as
      76                 :             :    slots can be evicted.
      77                 :             : 
      78                 :             :    Filenames are stored by pointer, and so must outlive the cache
      79                 :             :    instance.  */
      80                 :             : 
      81                 :             : class file_cache
      82                 :             : {
      83                 :             :  public:
      84                 :             :   file_cache ();
      85                 :             :   ~file_cache ();
      86                 :             : 
      87                 :             :   void dump (FILE *out, int indent) const;
      88                 :             :   void DEBUG_FUNCTION dump () const;
      89                 :             : 
      90                 :             :   file_cache_slot *lookup_or_add_file (const char *file_path);
      91                 :             :   void forcibly_evict_file (const char *file_path);
      92                 :             : 
      93                 :             :   /* See comments in diagnostic.h about the input conversion context.  */
      94                 :             :   struct input_context
      95                 :             :   {
      96                 :             :     diagnostic_input_charset_callback ccb;
      97                 :             :     bool should_skip_bom;
      98                 :             :   };
      99                 :             :   void initialize_input_context (diagnostic_input_charset_callback ccb,
     100                 :             :                                  bool should_skip_bom);
     101                 :             : 
     102                 :             :   char_span get_source_file_content (const char *file_path);
     103                 :             :   char_span get_source_line (const char *file_path, int line);
     104                 :             :   bool missing_trailing_newline_p (const char *file_path);
     105                 :             : 
     106                 :             :   void add_buffered_content (const char *file_path,
     107                 :             :                              const char *buffer,
     108                 :             :                              size_t sz);
     109                 :             : 
     110                 :             :   void tune (size_t num_file_slots, size_t lines);
     111                 :             : 
     112                 :             :  private:
     113                 :             :   file_cache_slot *evicted_cache_tab_entry (unsigned *highest_use_count);
     114                 :             :   file_cache_slot *add_file (const char *file_path);
     115                 :             :   file_cache_slot *lookup_file (const char *file_path);
     116                 :             : 
     117                 :             :  private:
     118                 :             :   size_t m_num_file_slots;
     119                 :             :   file_cache_slot *m_file_slots;
     120                 :             :   input_context m_input_context;
     121                 :             : };
     122                 :             : 
     123                 :             : } // namespace diagnostics
     124                 :             : 
     125                 :             : #endif // #ifndef GCC_DIAGNOSTICS_FILE_CACHE_H
        

Generated by: LCOV version 2.1-beta

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.