LCOV - code coverage report
Current view: top level - gcc/diagnostics - paths.h (source / functions) Coverage Total Hit
Test: gcc.info Lines: 100.0 % 12 12
Test Date: 2025-09-20 13:40:47 Functions: 100.0 % 1 1
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             Branch data     Line data    Source code
       1                 :             : /* Paths through the code associated with a diagnostic.
       2                 :             :    Copyright (C) 2019-2025 Free Software Foundation, Inc.
       3                 :             :    Contributed by David Malcolm <dmalcolm@redhat.com>
       4                 :             : 
       5                 :             : This file is part of GCC.
       6                 :             : 
       7                 :             : GCC is free software; you can redistribute it and/or modify it under
       8                 :             : the terms of the GNU General Public License as published by the Free
       9                 :             : Software Foundation; either version 3, or (at your option) any later
      10                 :             : version.
      11                 :             : 
      12                 :             : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      13                 :             : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      14                 :             : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      15                 :             : for more details.
      16                 :             : 
      17                 :             : You should have received a copy of the GNU General Public License
      18                 :             : along with GCC; see the file COPYING3.  If not see
      19                 :             : <http://www.gnu.org/licenses/>.  */
      20                 :             : 
      21                 :             : #ifndef GCC_DIAGNOSTICS_PATHS_H
      22                 :             : #define GCC_DIAGNOSTICS_PATHS_H
      23                 :             : 
      24                 :             : #include "diagnostic.h" /* for ATTRIBUTE_GCC_DIAG.  */
      25                 :             : #include "diagnostics/event-id.h"
      26                 :             : #include "diagnostics/logical-locations.h"
      27                 :             : 
      28                 :             : namespace diagnostics {
      29                 :             :   namespace digraphs {
      30                 :             :     class digraph;
      31                 :             :   } // namespace digraphs
      32                 :             :   namespace logical_locations {
      33                 :             :     class manager;
      34                 :             :   } // logical_locations
      35                 :             :   class sarif_builder;
      36                 :             :   class sarif_object;
      37                 :             : } //namespace diagnostics
      38                 :             : 
      39                 :             : namespace diagnostics {
      40                 :             : namespace paths {
      41                 :             : 
      42                 :             : /* A diagnostics::paths::path is an optional additional piece of metadata associated
      43                 :             :    with a diagnostic (via its rich_location).
      44                 :             : 
      45                 :             :    It describes a sequence of events predicted by the compiler that
      46                 :             :    lead to the problem occurring, with their locations in the user's source,
      47                 :             :    and text descriptions.
      48                 :             : 
      49                 :             :    For example, the following error has a 3-event path:
      50                 :             : 
      51                 :             :      test.c: In function 'demo':
      52                 :             :      test.c:29:5: error: passing NULL as argument 1 to 'PyList_Append' which
      53                 :             :        requires a non-NULL parameter
      54                 :             :         29 |     PyList_Append(list, item);
      55                 :             :            |     ^~~~~~~~~~~~~~~~~~~~~~~~~
      56                 :             :        'demo': events 1-3
      57                 :             :         25 |   list = PyList_New(0);
      58                 :             :            |          ^~~~~~~~~~~~~
      59                 :             :            |          |
      60                 :             :            |          (1) when 'PyList_New' fails, returning NULL
      61                 :             :         26 |
      62                 :             :         27 |   for (i = 0; i < count; i++) {
      63                 :             :            |   ~~~
      64                 :             :            |   |
      65                 :             :            |   (2) when 'i < count'
      66                 :             :         28 |     item = PyLong_FromLong(random());
      67                 :             :         29 |     PyList_Append(list, item);
      68                 :             :            |     ~~~~~~~~~~~~~~~~~~~~~~~~~
      69                 :             :            |     |
      70                 :             :            |     (3) when calling 'PyList_Append', passing NULL from (1) as argument 1
      71                 :             : 
      72                 :             :     The diagnostic-printing code has consolidated the path into a single
      73                 :             :     run of events, since all the events are near each other and within the same
      74                 :             :     function; more complicated examples (such as interprocedural paths)
      75                 :             :     might be printed as multiple runs of events.  */
      76                 :             : 
      77                 :             : /* Abstract base classes, describing events within a path, and the paths
      78                 :             :    themselves.  */
      79                 :             : 
      80                 :             : /* One event within a path.  */
      81                 :             : 
      82                 :       64417 : class event
      83                 :             : {
      84                 :             :  public:
      85                 :             :   /* Enums for giving a sense of what this event means.
      86                 :             :      Roughly corresponds to SARIF v2.1.0 section 3.38.8.  */
      87                 :             :   enum class verb
      88                 :             :   {
      89                 :             :     unknown,
      90                 :             : 
      91                 :             :     acquire,
      92                 :             :     release,
      93                 :             :     enter,
      94                 :             :     exit,
      95                 :             :     call,
      96                 :             :     return_,
      97                 :             :     branch,
      98                 :             : 
      99                 :             :     danger
     100                 :             :   };
     101                 :             :   enum class noun
     102                 :             :   {
     103                 :             :     unknown,
     104                 :             : 
     105                 :             :     taint,
     106                 :             :     sensitive, // this one isn't in SARIF v2.1.0; filed as https://github.com/oasis-tcs/sarif-spec/issues/530
     107                 :             :     function,
     108                 :             :     lock,
     109                 :             :     memory,
     110                 :             :     resource
     111                 :             :   };
     112                 :             :   enum class property
     113                 :             :   {
     114                 :             :     unknown,
     115                 :             : 
     116                 :             :     true_,
     117                 :             :     false_
     118                 :             :   };
     119                 :             :   /* A bundle of such enums, allowing for descriptions of the meaning of
     120                 :             :      an event, such as
     121                 :             :      - "acquire memory": meaning (verb::acquire, noun::memory)
     122                 :             :      - "take true branch"": meaning (verb::branch, property::true)
     123                 :             :      - "return from function": meaning (verb::return, noun::function)
     124                 :             :      etc, as per SARIF's threadFlowLocation "kinds" property
     125                 :             :      (SARIF v2.1.0 section 3.38.8).  */
     126                 :             :   struct meaning
     127                 :             :   {
     128                 :        3612 :     meaning ()
     129                 :             :     : m_verb (verb::unknown),
     130                 :             :       m_noun (noun::unknown),
     131                 :             :       m_property (property::unknown)
     132                 :             :     {
     133                 :             :     }
     134                 :         951 :     meaning (enum verb verb, enum noun noun)
     135                 :             :     : m_verb (verb), m_noun (noun), m_property (property::unknown)
     136                 :             :     {
     137                 :             :     }
     138                 :         242 :     meaning (enum verb verb, enum property property)
     139                 :             :     : m_verb (verb), m_noun (noun::unknown), m_property (property)
     140                 :             :     {
     141                 :             :     }
     142                 :             : 
     143                 :             :     void dump_to_pp (pretty_printer *pp) const;
     144                 :             : 
     145                 :             :     static const char *maybe_get_verb_str (enum verb);
     146                 :             :     static const char *maybe_get_noun_str (enum noun);
     147                 :             :     static const char *maybe_get_property_str (enum property);
     148                 :             : 
     149                 :             :     enum verb m_verb;
     150                 :             :     enum noun m_noun;
     151                 :             :     enum property m_property;
     152                 :             :   };
     153                 :             : 
     154                 :        5022 :   virtual ~event () {}
     155                 :             : 
     156                 :             :   virtual location_t get_location () const = 0;
     157                 :             : 
     158                 :             :   /* Stack depth, so that consumers can visualize the interprocedural
     159                 :             :      calls, returns, and frame nesting.  */
     160                 :             :   virtual int get_stack_depth () const = 0;
     161                 :             : 
     162                 :             :   /* Print a localized (and possibly colorized) description of this event.  */
     163                 :             :   virtual void print_desc (pretty_printer &pp) const = 0;
     164                 :             : 
     165                 :             :   /* Get a logical location for this event, or null if there is none.  */
     166                 :             :   virtual logical_locations::key get_logical_location () const = 0;
     167                 :             : 
     168                 :             :   virtual meaning get_meaning () const = 0;
     169                 :             : 
     170                 :             :   /* True iff we should draw a line connecting this event to the
     171                 :             :      next event (e.g. to highlight control flow).  */
     172                 :             :   virtual bool connect_to_next_event_p () const = 0;
     173                 :             : 
     174                 :             :   virtual thread_id_t get_thread_id () const = 0;
     175                 :             : 
     176                 :             :   /* Hook for SARIF output to allow for adding diagnostic-specific
     177                 :             :      properties to the threadFlowLocation object's property bag.  */
     178                 :             :   virtual void
     179                 :           9 :   maybe_add_sarif_properties (sarif_builder &,
     180                 :             :                               sarif_object &/*thread_flow_loc_obj*/) const
     181                 :             :   {
     182                 :           9 :   }
     183                 :             : 
     184                 :             :   /* Hook for capturing state at this event, potentially for visualizing
     185                 :             :      in HTML output, or for adding to SARIF.  */
     186                 :             :   virtual std::unique_ptr<digraphs::digraph>
     187                 :             :   maybe_make_diagnostic_state_graph (bool debug) const;
     188                 :             : 
     189                 :             :   label_text get_desc (pretty_printer &ref_pp) const;
     190                 :             : };
     191                 :             : 
     192                 :             : /* Abstract base class representing a thread of execution within
     193                 :             :    a diagnostics::paths::path.
     194                 :             :    Each event is associated with one thread.
     195                 :             :    Typically there is just one thread per diagnostics::paths::path. */
     196                 :             : 
     197                 :       11407 : class thread
     198                 :             : {
     199                 :             : public:
     200                 :             :   virtual ~thread () {}
     201                 :             :   virtual label_text get_name (bool can_colorize) const = 0;
     202                 :             : };
     203                 :             : 
     204                 :             : /* Abstract base class for getting at a sequence of events.  */
     205                 :             : 
     206                 :             : class path
     207                 :             : {
     208                 :             :  public:
     209                 :             :   virtual ~path () {}
     210                 :             :   virtual unsigned num_events () const = 0;
     211                 :             :   virtual const event & get_event (int idx) const = 0;
     212                 :             :   virtual unsigned num_threads () const = 0;
     213                 :             :   virtual const thread &
     214                 :             :   get_thread (thread_id_t) const = 0;
     215                 :             : 
     216                 :             :   /* Return true iff the two events are both within the same function,
     217                 :             :      or both outside of any function.  */
     218                 :             :   virtual bool
     219                 :             :   same_function_p (int event_idx_a,
     220                 :             :                    int event_idx_b) const = 0;
     221                 :             : 
     222                 :             :   bool interprocedural_p () const;
     223                 :             :   bool multithreaded_p () const;
     224                 :             : 
     225                 :       10936 :   const logical_locations::manager &get_logical_location_manager () const
     226                 :             :   {
     227                 :       10936 :     return m_logical_loc_mgr;
     228                 :             :   }
     229                 :             : 
     230                 :             : protected:
     231                 :      872887 :   path (const logical_locations::manager &logical_loc_mgr)
     232                 :      872887 :   : m_logical_loc_mgr (logical_loc_mgr)
     233                 :             :   {
     234                 :             :   }
     235                 :             : 
     236                 :             : private:
     237                 :             :   bool get_first_event_in_a_function (unsigned *out_idx) const;
     238                 :             : 
     239                 :             :   const logical_locations::manager &m_logical_loc_mgr;
     240                 :             : };
     241                 :             : 
     242                 :             : } // namespace paths
     243                 :             : } // namespace diagnostics
     244                 :             : 
     245                 :             : /* Concrete subclasses of the above can be found in
     246                 :             :    simple-diagnostic-path.h.  */
     247                 :             : 
     248                 :             : extern void debug (diagnostics::paths::path *path);
     249                 :             : 
     250                 :             : #endif /* ! GCC_DIAGNOSTICS_PATHS_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.