No more long-lived parsers.

We've had too many bugs from improper re-initialization.

Fixes https://gitlab.com/kicad/code/kicad/issues/9429

common/drawing_sheet/drawing_sheet_parser.cpp

@@ -857,16 +857,20 @@ void DS_DATA_MODEL::SetPageLayout( const char* aPageLayout, bool Append, const w
     if( ! Append )
         ClearList();
 
-    DRAWING_SHEET_PARSER lp_parser( aPageLayout, wxT( "Sexpr_string" ) );
+    DRAWING_SHEET_PARSER parser( aPageLayout, wxT( "Sexpr_string" ) );
 
     try
     {
-        lp_parser.Parse( this );
+        parser.Parse( this );
     }
     catch( const IO_ERROR& ioe )
     {
         wxLogMessage( ioe.What() );
     }
+    catch( const std::bad_alloc& )
+    {
+        wxLogMessage( "Memory exhaustion reading drawing sheet" );
+    }
 }
 
 
@@ -920,11 +924,11 @@ bool DS_DATA_MODEL::LoadDrawingSheet( const wxString& aFullFileName, bool Append
         if( ! Append )
             ClearList();
 
-        DRAWING_SHEET_PARSER pl_parser( buffer.get(), fullFileName );
+        DRAWING_SHEET_PARSER parser( buffer.get(), fullFileName );
 
         try
         {
-            pl_parser.Parse( this );
+            parser.Parse( this );
         }
         catch( const IO_ERROR& ioe )
         {

pcbnew/kicad_clipboard.cpp

@@ -2,6 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2017 KiCad Developers, see AUTHORS.TXT for contributors.
+ * Copyright (C) 2017-2021 KiCad Developers, see AUTHORS.txt for contributors.
  * @author Kristoffer Ödmark
  *
  * This program is free software; you can redistribute it and/or
@@ -25,7 +26,6 @@
 #include <wx/clipbrd.h>
 #include <wx/log.h>
 
-#include <build_version.h>
 #include <board.h>
 #include <ignore.h>
 #include <pad.h>
@@ -402,18 +402,16 @@ BOARD* CLIPBOARD_IO::Load( const wxString& aFileName, BOARD* aAppendToMe,
     }
 
     STRING_LINE_READER reader( result, wxT( "clipboard" ) );
+    PCB_PARSER         parser( &reader, aAppendToMe );
 
     init( aProperties );
 
-    m_parser->SetLineReader( &reader );
-    m_parser->SetBoard( aAppendToMe );
-
     BOARD_ITEM* item;
     BOARD* board;
 
     try
     {
-        item =  m_parser->Parse();
+        item =  parser.Parse();
     }
     catch( const FUTURE_FORMAT_ERROR& )
     {
@@ -422,8 +420,8 @@ BOARD* CLIPBOARD_IO::Load( const wxString& aFileName, BOARD* aAppendToMe,
     }
     catch( const PARSE_ERROR& parse_error )
     {
-        if( m_parser->IsTooRecent() )
+        if( parser.IsTooRecent() )
-            throw FUTURE_FORMAT_ERROR( parse_error, m_parser->GetRequiredVersion() );
+            throw FUTURE_FORMAT_ERROR( parse_error, parser.GetRequiredVersion() );
         else
             throw;
     }
@@ -431,9 +429,8 @@ BOARD* CLIPBOARD_IO::Load( const wxString& aFileName, BOARD* aAppendToMe,
     if( item->Type() != PCB_T )
     {
         // The parser loaded something that was valid, but wasn't a board.
-        THROW_PARSE_ERROR( _( "Clipboard content is not KiCad compatible" ),
+        THROW_PARSE_ERROR( _( "Clipboard content is not KiCad compatible" ), parser.CurSource(),
-                m_parser->CurSource(), m_parser->CurLine(),
+                           parser.CurLine(), parser.CurLineNumber(), parser.CurOffset() );
-                m_parser->CurLineNumber(), m_parser->CurOffset() );
     }
     else
     {

pcbnew/netlist_reader/kicad_netlist_reader.cpp

@@ -1,11 +1,8 @@
-/**
- * @file kicad_netlist_reader.cpp
- */
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 1992-2011 Jean-Pierre Charras.
- * Copyright (C) 1992-2020 KiCad Developers, see change_log.txt for contributors.
+ * Copyright (C) 1992-2021 KiCad Developers, see change_log.txt for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -36,7 +33,9 @@ using namespace NL_T;
 
 void KICAD_NETLIST_READER::LoadNetlist()
 {
-    m_parser->Parse();
+    KICAD_NETLIST_PARSER parser( m_lineReader, m_netlist );
+
+    parser.Parse();
 
     if( m_footprintReader )
     {

pcbnew/netlist_reader/netlist_reader.h

@@ -1,10 +1,3 @@
-#ifndef NETLIST_READER_H
-#define NETLIST_READER_H
-
-/**
- * @file netlist_reader.h
- */
-
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
@@ -30,6 +23,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  */
 
+#ifndef NETLIST_READER_H
+#define NETLIST_READER_H
+
 #include <boost/ptr_container/ptr_vector.hpp>
 
 #include <macros.h>
@@ -172,11 +168,6 @@ public:
      */
     virtual void LoadNetlist() = 0;
 
-    /**
-     * @return the #LINE_READER associated with the #NETLIST_READER.
-     */
-    LINE_READER* GetLineReader();
-
 protected:
     NETLIST*     m_netlist;               ///< The net list to read the file(s) into.
     bool         m_loadFootprintFilters;  ///< Load the component footprint filters section if true.
@@ -280,10 +271,6 @@ class KICAD_NETLIST_PARSER : public NETLIST_LEXER
 public:
     KICAD_NETLIST_PARSER( LINE_READER* aReader, NETLIST* aNetlist );
 
-    void SetLineReader( LINE_READER* aLineReader );
-
-    void SetNetlist( NETLIST* aNetlist ) { m_netlist = aNetlist; }
-
     /**
      * Function Parse
      * parse the full netlist
@@ -364,20 +351,13 @@ public:
     KICAD_NETLIST_READER( LINE_READER*  aLineReader,
                           NETLIST*      aNetlist,
                           CMP_READER*   aFootprintLinkReader = nullptr ) :
-        NETLIST_READER( aLineReader, aNetlist, aFootprintLinkReader ),
+        NETLIST_READER( aLineReader, aNetlist, aFootprintLinkReader )
-        m_parser( new KICAD_NETLIST_PARSER( aLineReader, aNetlist ) )
+    { }
-    {
-    }
 
     virtual ~KICAD_NETLIST_READER()
-    {
+    { }
-        delete m_parser;
-    }
 
     virtual void LoadNetlist() override;
-
-private:
-    KICAD_NETLIST_PARSER* m_parser;     ///< The s-expression format parser.
 };
 
 

pcbnew/plugins/kicad/pcb_parser.h

@@ -72,48 +72,20 @@ class PROGRESS_REPORTER;
 class PCB_PARSER : public PCB_LEXER
 {
 public:
-    PCB_PARSER( LINE_READER* aReader = nullptr ) :
+    PCB_PARSER( LINE_READER* aReader, BOARD* aBoard = nullptr,
+                PROGRESS_REPORTER* aProgressReporter = nullptr, unsigned aLineCount = 0 ) :
         PCB_LEXER( aReader ),
-        m_board( nullptr ),
+        m_board( aBoard ),
-        m_resetKIIDs( false ),
+        m_resetKIIDs( aBoard != nullptr ),
-        m_progressReporter( nullptr ),
+        m_progressReporter( aProgressReporter ),
         m_lastProgressTime( std::chrono::steady_clock::now() ),
-        m_lineCount( 0 )
+        m_lineCount( aLineCount )
     {
         init();
     }
 
     // ~PCB_PARSER() {}
 
-    /**
-     * Set @a aLineReader into the parser, and returns the previous one, if any.
-     *
-     * @param aReader is what to read from for tokens, no ownership is received.
-     * @return LINE_READER* - previous LINE_READER or NULL if none.
-     */
-    LINE_READER* SetLineReader( LINE_READER* aReader )
-    {
-        LINE_READER* ret = PopReader();
-        PushReader( aReader );
-        return ret;
-    }
-
-    void SetBoard( BOARD* aBoard )
-    {
-        init();
-        m_board = aBoard;
-
-        if( aBoard != nullptr )
-            m_resetKIIDs = true;
-    }
-
-    void SetProgressReporter( PROGRESS_REPORTER* aProgressReporter, unsigned aLineCount )
-    {
-        m_progressReporter = aProgressReporter;
-        m_lastProgressTime = std::chrono::steady_clock::now();
-        m_lineCount = aLineCount;
-    }
-
     BOARD_ITEM* Parse();
 
     /**

pcbnew/plugins/kicad/pcb_plugin.cpp

@@ -263,15 +263,9 @@ void FP_CACHE::Load()
             try
             {
                 FILE_LINE_READER reader( fn.GetFullPath() );
+                PCB_PARSER       parser( &reader );
 
-                m_owner->m_parser->SetLineReader( &reader );
+                FOOTPRINT* footprint = (FOOTPRINT*) parser.Parse();
-
-                // For better or worse (mostly worse), the parser is a long-lived object.
-                // Make sure we start with a fresh state.
-                m_owner->m_parser->InitParserState();
-                m_owner->m_parser->SetBoard( nullptr );     // calls PCB_PARSER::init()
-
-                FOOTPRINT* footprint = (FOOTPRINT*) m_owner->m_parser->Parse();
                 wxString   fpName = fn.GetName();
 
                 footprint->SetFPID( LIB_ID( wxEmptyString, fpName ) );
@@ -380,17 +374,16 @@ BOARD_ITEM* PCB_PLUGIN::Parse( const wxString& aClipboardSourceInput )
     std::string input = TO_UTF8( aClipboardSourceInput );
 
     STRING_LINE_READER reader( input, wxT( "clipboard" ) );
-
+    PCB_PARSER         parser( &reader );
-    m_parser->SetLineReader( &reader );
 
     try
     {
-        return m_parser->Parse();
+        return parser.Parse();
     }
     catch( const PARSE_ERROR& parse_error )
     {
-        if( m_parser->IsTooRecent() )
+        if( parser.IsTooRecent() )
-            throw FUTURE_FORMAT_ERROR( parse_error, m_parser->GetRequiredVersion() );
+            throw FUTURE_FORMAT_ERROR( parse_error, parser.GetRequiredVersion() );
         else
             throw;
     }
@@ -2285,7 +2278,6 @@ void PCB_PLUGIN::format( const ZONE* aZone, int aNestLevel ) const
 PCB_PLUGIN::PCB_PLUGIN( int aControlFlags ) :
     m_cache( nullptr ),
     m_ctl( aControlFlags ),
-    m_parser( new PCB_PARSER() ),
     m_mapping( new NETINFO_MAPPING() )
 {
     init( nullptr );
@@ -2296,7 +2288,6 @@ PCB_PLUGIN::PCB_PLUGIN( int aControlFlags ) :
 PCB_PLUGIN::~PCB_PLUGIN()
 {
     delete m_cache;
-    delete m_parser;
     delete m_mapping;
 }
 
@@ -2336,15 +2327,12 @@ BOARD* PCB_PLUGIN::DoLoad( LINE_READER& aReader, BOARD* aAppendToMe, const PROPE
 {
     init( aProperties );
 
-    m_parser->SetLineReader( &aReader );
+    PCB_PARSER parser( &aReader, aAppendToMe, aProgressReporter, aLineCount );
-    m_parser->SetBoard( aAppendToMe );
-    m_parser->SetProgressReporter( aProgressReporter, aLineCount );
-
     BOARD*     board;
 
     try
     {
-        board = dynamic_cast<BOARD*>( m_parser->Parse() );
+        board = dynamic_cast<BOARD*>( parser.Parse() );
     }
     catch( const FUTURE_FORMAT_ERROR& )
     {
@@ -2353,8 +2341,8 @@ BOARD* PCB_PLUGIN::DoLoad( LINE_READER& aReader, BOARD* aAppendToMe, const PROPE
     }
     catch( const PARSE_ERROR& parse_error )
     {
-        if( m_parser->IsTooRecent() )
+        if( parser.IsTooRecent() )
-            throw FUTURE_FORMAT_ERROR( parse_error, m_parser->GetRequiredVersion() );
+            throw FUTURE_FORMAT_ERROR( parse_error, parser.GetRequiredVersion() );
         else
             throw;
     }
@@ -2362,8 +2350,8 @@ BOARD* PCB_PLUGIN::DoLoad( LINE_READER& aReader, BOARD* aAppendToMe, const PROPE
     if( !board )
     {
         // The parser loaded something that was valid, but wasn't a board.
-        THROW_PARSE_ERROR( _( "This file does not contain a PCB." ), m_parser->CurSource(),
+        THROW_PARSE_ERROR( _( "This file does not contain a PCB." ), parser.CurSource(),
-                           m_parser->CurLine(), m_parser->CurLineNumber(), m_parser->CurOffset() );
+                           parser.CurLine(), parser.CurLineNumber(), parser.CurOffset() );
     }
 
     return board;

pcbnew/plugins/kicad/pcb_plugin.h

@@ -2,7 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2012 CERN.
- * Copyright (C) 1992-2020 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2021 KiCad Developers, see AUTHORS.txt for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -297,7 +297,6 @@ protected:
     STRING_FORMATTER    m_sf;
     OUTPUTFORMATTER*    m_out;      ///< output any Format()s to this, no ownership
     int                 m_ctl;
-    PCB_PARSER*         m_parser;
     NETINFO_MAPPING*    m_mapping;  ///< mapping for net codes, so only not empty net codes
                                     ///< are stored with consecutive integers as net codes
 };

qa/pcbnew_tools/tools/pcb_parser/pcb_parser_tool.cpp

@@ -1,7 +1,7 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2019 KiCad Developers, see AUTHORS.TXT for contributors.
+ * Copyright (C) 2019-2021 KiCad Developers, see AUTHORS.TXT for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -25,7 +25,6 @@
 
 #include <cstdio>
 #include <string>
-
 #include <common.h>
 #include <profile.h>
 
@@ -35,11 +34,7 @@
 #include <plugins/kicad/pcb_plugin.h>
 #include <plugins/kicad/pcb_parser.h>
 #include <richio.h>
-
-#include <wx/cmdline.h>
-
 #include <qa_utils/stdstream_line_reader.h>
-#include <qa_utils/utility_registry.h>
 
 
 using PARSE_DURATION = std::chrono::microseconds;
@@ -57,10 +52,7 @@ bool parse( std::istream& aStream, bool aVerbose )
     STDISTREAM_LINE_READER reader;
     reader.SetStream( aStream );
 
-    PCB_PARSER parser;
+    PCB_PARSER  parser( &reader );
-
-    parser.SetLineReader( &reader );
-
     BOARD_ITEM* board = nullptr;
 
     PARSE_DURATION duration{};
@@ -110,10 +102,9 @@ int pcb_parser_main_func( int argc, char** argv )
     wxMessageOutput::Set( new wxMessageOutputStderr );
     wxCmdLineParser cl_parser( argc, argv );
     cl_parser.SetDesc( g_cmdLineDesc );
-    cl_parser.AddUsageText(
+    cl_parser.AddUsageText( _( "This program parses PCB files, either from the stdin stream or "
-            _( "This program parses PCB files, either from the "
+                               "from the given filenames. This can be used either for standalone "
-               "stdin stream or from the given filenames. This can be used either for "
+                               "testing of the parser or for fuzz testing." ) );
-               "standalone testing of the parser or for fuzz testing." ) );
 
     int cmd_parsed_ok = cl_parser.Parse();
     if( cmd_parsed_ok != 0 )
@@ -123,10 +114,8 @@ int pcb_parser_main_func( int argc, char** argv )
     }
 
     const bool   verbose = cl_parser.Found( "verbose" );
-
     bool         ok = true;
-
+    const size_t file_count = cl_parser.GetParamCount();
-    const auto file_count = cl_parser.GetParamCount();
 
     if( file_count == 0 )
     {
@@ -163,5 +152,6 @@ int pcb_parser_main_func( int argc, char** argv )
 }
 
 
-static bool registered = UTILITY_REGISTRY::Register(
+static bool registered = UTILITY_REGISTRY::Register( { "pcb_parser",
-        { "pcb_parser", "Parse a KiCad PCB file", pcb_parser_main_func } );
+                                                       "Parse a KiCad PCB file",
+                                                       pcb_parser_main_func } );

qa/pcbnew_utils/board_file_utils.cpp

@@ -1,7 +1,7 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2019 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 2019-2021 KiCad Developers, see AUTHORS.txt for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -69,27 +69,13 @@ void DumpBoardToFile( BOARD& board, const std::string& aFilename )
 }
 
 
-std::unique_ptr<BOARD_ITEM> ReadBoardItemFromFile( const std::string& aFilename )
-{
-    FILE_LINE_READER reader( aFilename );
-
-    PCB_PARSER parser;
-    parser.SetLineReader( &reader );
-
-    return std::unique_ptr<BOARD_ITEM>( parser.Parse() );
-}
-
-
 std::unique_ptr<BOARD_ITEM> ReadBoardItemFromStream( std::istream& aStream )
 {
     // Take input from stdin
     STDISTREAM_LINE_READER reader;
     reader.SetStream( aStream );
 
-    PCB_PARSER parser;
+    PCB_PARSER                  parser( &reader );
-
-    parser.SetLineReader( &reader );
-
     std::unique_ptr<BOARD_ITEM> board;
 
     try