LCOV - code coverage report
Current view: top level - gcc - diagnostic-path.h (source / functions) Coverage Total Hit
Test: gcc.info Lines: 100.0 % 23 23
Test Date: 2024-04-20 14:03:02 Functions: 100.0 % 9 9
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : /* Paths through the code associated with a diagnostic.
       2                 :             :    Copyright (C) 2019-2024 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_DIAGNOSTIC_PATH_H
      22                 :             : #define GCC_DIAGNOSTIC_PATH_H
      23                 :             : 
      24                 :             : #include "diagnostic.h" /* for ATTRIBUTE_GCC_DIAG.  */
      25                 :             : #include "diagnostic-event-id.h"
      26                 :             : 
      27                 :             : class sarif_object;
      28                 :             : 
      29                 :             : /* A diagnostic_path is an optional additional piece of metadata associated
      30                 :             :    with a diagnostic (via its rich_location).
      31                 :             : 
      32                 :             :    It describes a sequence of events predicted by the compiler that
      33                 :             :    lead to the problem occurring, with their locations in the user's source,
      34                 :             :    and text descriptions.
      35                 :             : 
      36                 :             :    For example, the following error has a 3-event path:
      37                 :             : 
      38                 :             :      test.c: In function 'demo':
      39                 :             :      test.c:29:5: error: passing NULL as argument 1 to 'PyList_Append' which
      40                 :             :        requires a non-NULL parameter
      41                 :             :         29 |     PyList_Append(list, item);
      42                 :             :            |     ^~~~~~~~~~~~~~~~~~~~~~~~~
      43                 :             :        'demo': events 1-3
      44                 :             :           |
      45                 :             :           |   25 |   list = PyList_New(0);
      46                 :             :           |      |          ^~~~~~~~~~~~~
      47                 :             :           |      |          |
      48                 :             :           |      |          (1) when 'PyList_New' fails, returning NULL
      49                 :             :           |   26 |
      50                 :             :           |   27 |   for (i = 0; i < count; i++) {
      51                 :             :           |      |   ~~~
      52                 :             :           |      |   |
      53                 :             :           |      |   (2) when 'i < count'
      54                 :             :           |   28 |     item = PyLong_FromLong(random());
      55                 :             :           |   29 |     PyList_Append(list, item);
      56                 :             :           |      |     ~~~~~~~~~~~~~~~~~~~~~~~~~
      57                 :             :           |      |     |
      58                 :             :           |      |     (3) when calling 'PyList_Append', passing NULL from (1) as argument 1
      59                 :             :           |
      60                 :             : 
      61                 :             :     The diagnostic-printing code has consolidated the path into a single
      62                 :             :     run of events, since all the events are near each other and within the same
      63                 :             :     function; more complicated examples (such as interprocedural paths)
      64                 :             :     might be printed as multiple runs of events.  */
      65                 :             : 
      66                 :             : /* Abstract base classes, describing events within a path, and the paths
      67                 :             :    themselves.  */
      68                 :             : 
      69                 :             : /* One event within a diagnostic_path.  */
      70                 :             : 
      71                 :       66274 : class diagnostic_event
      72                 :             : {
      73                 :             :  public:
      74                 :             :   /* Enums for giving a sense of what this event means.
      75                 :             :      Roughly corresponds to SARIF v2.1.0 section 3.38.8.  */
      76                 :             :   enum verb
      77                 :             :   {
      78                 :             :     VERB_unknown,
      79                 :             : 
      80                 :             :     VERB_acquire,
      81                 :             :     VERB_release,
      82                 :             :     VERB_enter,
      83                 :             :     VERB_exit,
      84                 :             :     VERB_call,
      85                 :             :     VERB_return,
      86                 :             :     VERB_branch,
      87                 :             : 
      88                 :             :     VERB_danger
      89                 :             :   };
      90                 :             :   enum noun
      91                 :             :   {
      92                 :             :     NOUN_unknown,
      93                 :             : 
      94                 :             :     NOUN_taint,
      95                 :             :     NOUN_sensitive, // this one isn't in SARIF v2.1.0; filed as https://github.com/oasis-tcs/sarif-spec/issues/530
      96                 :             :     NOUN_function,
      97                 :             :     NOUN_lock,
      98                 :             :     NOUN_memory,
      99                 :             :     NOUN_resource
     100                 :             :   };
     101                 :             :   enum property
     102                 :             :   {
     103                 :             :     PROPERTY_unknown,
     104                 :             : 
     105                 :             :     PROPERTY_true,
     106                 :             :     PROPERTY_false
     107                 :             :   };
     108                 :             :   /* A bundle of such enums, allowing for descriptions of the meaning of
     109                 :             :      an event, such as
     110                 :             :      - "acquire memory": meaning (VERB_acquire, NOUN_memory)
     111                 :             :      - "take true branch"": meaning (VERB_branch, PROPERTY_true)
     112                 :             :      - "return from function": meaning (VERB_return, NOUN_function)
     113                 :             :      etc, as per SARIF's threadFlowLocation "kinds" property
     114                 :             :      (SARIF v2.1.0 section 3.38.8).  */
     115                 :             :   struct meaning
     116                 :             :   {
     117                 :          49 :     meaning ()
     118                 :             :     : m_verb (VERB_unknown),
     119                 :             :       m_noun (NOUN_unknown),
     120                 :             :       m_property (PROPERTY_unknown)
     121                 :             :     {
     122                 :             :     }
     123                 :         165 :     meaning (enum verb verb, enum noun noun)
     124                 :             :     : m_verb (verb), m_noun (noun), m_property (PROPERTY_unknown)
     125                 :             :     {
     126                 :             :     }
     127                 :          10 :     meaning (enum verb verb, enum property property)
     128                 :             :     : m_verb (verb), m_noun (NOUN_unknown), m_property (property)
     129                 :             :     {
     130                 :             :     }
     131                 :             : 
     132                 :             :     void dump_to_pp (pretty_printer *pp) const;
     133                 :             : 
     134                 :             :     static const char *maybe_get_verb_str (enum verb);
     135                 :             :     static const char *maybe_get_noun_str (enum noun);
     136                 :             :     static const char *maybe_get_property_str (enum property);
     137                 :             : 
     138                 :             :     enum verb m_verb;
     139                 :             :     enum noun m_noun;
     140                 :             :     enum property m_property;
     141                 :             :   };
     142                 :             : 
     143                 :         542 :   virtual ~diagnostic_event () {}
     144                 :             : 
     145                 :             :   virtual location_t get_location () const = 0;
     146                 :             : 
     147                 :             :   virtual tree get_fndecl () const = 0;
     148                 :             : 
     149                 :             :   /* Stack depth, so that consumers can visualizes the interprocedural
     150                 :             :      calls, returns, and frame nesting.  */
     151                 :             :   virtual int get_stack_depth () const = 0;
     152                 :             : 
     153                 :             :   /* Get a localized (and possibly colorized) description of this event.  */
     154                 :             :   virtual label_text get_desc (bool can_colorize) const = 0;
     155                 :             : 
     156                 :             :   /* Get a logical_location for this event, or NULL.  */
     157                 :             :   virtual const logical_location *get_logical_location () const = 0;
     158                 :             : 
     159                 :             :   virtual meaning get_meaning () const = 0;
     160                 :             : 
     161                 :             :   virtual diagnostic_thread_id_t get_thread_id () const = 0;
     162                 :             : 
     163                 :             :   /* Hook for SARIF output to allow for adding diagnostic-specific
     164                 :             :      properties to the threadFlowLocation object's property bag.  */
     165                 :             :   virtual void
     166                 :           9 :   maybe_add_sarif_properties (sarif_object &/*thread_flow_loc_obj*/) const
     167                 :             :   {
     168                 :           9 :   }
     169                 :             : };
     170                 :             : 
     171                 :             : /* Abstract base class representing a thread of execution within
     172                 :             :    a diagnostic_path.
     173                 :             :    Each diagnostic_event is associated with one thread.
     174                 :             :    Typically there is just one thread per diagnostic_path. */
     175                 :             : 
     176                 :        4551 : class diagnostic_thread
     177                 :             : {
     178                 :             : public:
     179                 :             :   virtual ~diagnostic_thread () {}
     180                 :             :   virtual label_text get_name (bool can_colorize) const = 0;
     181                 :             : };
     182                 :             : 
     183                 :             : /* Abstract base class for getting at a sequence of events.  */
     184                 :             : 
     185                 :        4545 : class diagnostic_path
     186                 :             : {
     187                 :             :  public:
     188                 :             :   virtual ~diagnostic_path () {}
     189                 :             :   virtual unsigned num_events () const = 0;
     190                 :             :   virtual const diagnostic_event & get_event (int idx) const = 0;
     191                 :             :   virtual unsigned num_threads () const = 0;
     192                 :             :   virtual const diagnostic_thread &
     193                 :             :   get_thread (diagnostic_thread_id_t) const = 0;
     194                 :             : 
     195                 :             :   bool interprocedural_p () const;
     196                 :             :   bool multithreaded_p () const;
     197                 :             : 
     198                 :             : private:
     199                 :             :   bool get_first_event_in_a_function (unsigned *out_idx) const;
     200                 :             : };
     201                 :             : 
     202                 :             : /* Concrete subclasses.  */
     203                 :             : 
     204                 :             : /* A simple implementation of diagnostic_event.  */
     205                 :             : 
     206                 :             : class simple_diagnostic_event : public diagnostic_event
     207                 :             : {
     208                 :             :  public:
     209                 :             :   simple_diagnostic_event (location_t loc, tree fndecl, int depth,
     210                 :             :                            const char *desc,
     211                 :             :                            diagnostic_thread_id_t thread_id = 0);
     212                 :             :   ~simple_diagnostic_event ();
     213                 :             : 
     214                 :         375 :   location_t get_location () const final override { return m_loc; }
     215                 :         546 :   tree get_fndecl () const final override { return m_fndecl; }
     216                 :         587 :   int get_stack_depth () const final override { return m_depth; }
     217                 :         261 :   label_text get_desc (bool) const final override
     218                 :             :   {
     219                 :         261 :     return label_text::borrow (m_desc);
     220                 :             :   }
     221                 :           9 :   const logical_location *get_logical_location () const final override
     222                 :             :   {
     223                 :           9 :     return NULL;
     224                 :             :   }
     225                 :           9 :   meaning get_meaning () const final override
     226                 :             :   {
     227                 :           9 :     return meaning ();
     228                 :             :   }
     229                 :         706 :   diagnostic_thread_id_t get_thread_id () const final override
     230                 :             :   {
     231                 :         706 :     return m_thread_id;
     232                 :             :   }
     233                 :             : 
     234                 :             :  private:
     235                 :             :   location_t m_loc;
     236                 :             :   tree m_fndecl;
     237                 :             :   int m_depth;
     238                 :             :   char *m_desc; // has been i18n-ed and formatted
     239                 :             :   diagnostic_thread_id_t m_thread_id;
     240                 :             : };
     241                 :             : 
     242                 :             : /* A simple implementation of diagnostic_thread.  */
     243                 :             : 
     244                 :             : class simple_diagnostic_thread : public diagnostic_thread
     245                 :             : {
     246                 :             : public:
     247                 :        4551 :   simple_diagnostic_thread (const char *name) : m_name (name) {}
     248                 :         289 :   label_text get_name (bool) const final override
     249                 :             :   {
     250                 :         289 :     return label_text::borrow (m_name);
     251                 :             :   }
     252                 :             : 
     253                 :             : private:
     254                 :             :   const char *m_name; // has been i18n-ed and formatted
     255                 :             : };
     256                 :             : 
     257                 :             : /* A simple implementation of diagnostic_path, as a vector of
     258                 :             :    simple_diagnostic_event instances.  */
     259                 :             : 
     260                 :             : class simple_diagnostic_path : public diagnostic_path
     261                 :             : {
     262                 :             :  public:
     263                 :             :   simple_diagnostic_path (pretty_printer *event_pp);
     264                 :             : 
     265                 :             :   unsigned num_events () const final override;
     266                 :             :   const diagnostic_event & get_event (int idx) const final override;
     267                 :             :   unsigned num_threads () const final override;
     268                 :             :   const diagnostic_thread &
     269                 :             :   get_thread (diagnostic_thread_id_t) const final override;
     270                 :             : 
     271                 :             :   diagnostic_thread_id_t add_thread (const char *name);
     272                 :             : 
     273                 :             :   diagnostic_event_id_t add_event (location_t loc, tree fndecl, int depth,
     274                 :             :                                    const char *fmt, ...)
     275                 :             :     ATTRIBUTE_GCC_DIAG(5,6);
     276                 :             :   diagnostic_event_id_t
     277                 :             :   add_thread_event (diagnostic_thread_id_t thread_id,
     278                 :             :                     location_t loc, tree fndecl, int depth,
     279                 :             :                     const char *fmt, ...)
     280                 :             :     ATTRIBUTE_GCC_DIAG(6,7);
     281                 :             : 
     282                 :             :  private:
     283                 :             :   auto_delete_vec<simple_diagnostic_thread> m_threads;
     284                 :             :   auto_delete_vec<simple_diagnostic_event> m_events;
     285                 :             : 
     286                 :             :   /* (for use by add_event).  */
     287                 :             :   pretty_printer *m_event_pp;
     288                 :             : };
     289                 :             : 
     290                 :             : extern void debug (diagnostic_path *path);
     291                 :             : 
     292                 :             : #endif /* ! GCC_DIAGNOSTIC_PATH_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.