| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // cc1.cc --
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| 8 | //
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| 9 | // Author : Peter A. Buhr
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| 10 | // Created On : Fri Aug 26 14:23:51 2005
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| 11 | // Last Modified By : Peter A. Buhr
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| 12 | // Last Modified On : Sat May 16 07:42:14 2015
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| 13 | // Update Count : 49
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| 14 | //
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| 15 |
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| 16 | #include <iostream>
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| 17 | using std::cerr;
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| 18 | using std::endl;
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| 19 | #include <string>
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| 20 | using std::string;
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| 21 | #include <cstdio> // stderr, stdout, perror, fprintf
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| 22 | #include <cstdlib> // getenv, exit, mkstemp
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| 23 | #include <unistd.h> // execvp, fork, unlink
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| 24 | #include <sys/wait.h> // wait
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| 25 |
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| 26 | #include "config.h" // configure info
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| 27 |
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| 28 |
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| 29 | //#define __DEBUG_H__
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| 30 |
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| 31 |
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| 32 | string compiler_name( GCC_PATH ); // path/name of C compiler
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| 33 |
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| 34 | string D__GCC_BPREFIX__( "-D__GCC_BPREFIX__=" );
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| 35 | string D__CFA_FLAGPREFIX__( "-D__CFA_FLAG__=" );
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| 36 |
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| 37 | char tmpname[] = P_tmpdir "/CFAXXXXXX";
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| 38 | int tmpfilefd = -1;
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| 39 |
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| 40 |
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| 41 | bool prefix( string arg, string pre ) {
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| 42 | return arg.substr( 0, pre.size() ) == pre;
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| 43 | } // prefix
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| 44 |
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| 45 |
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| 46 | void checkEnv( const char *args[], int &nargs ) {
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| 47 | char *value;
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| 48 |
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| 49 | value = getenv( "__COMPILER__" );
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| 50 | if ( value != NULL ) {
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| 51 | compiler_name = value;
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| 52 | #ifdef __DEBUG_H__
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| 53 | cerr << "env arg:\"" << compiler_name << "\"" << endl;
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| 54 | #endif // __DEBUG_H__
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| 55 | } // if
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| 56 |
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| 57 | value = getenv( "__GCC_MACHINE__" );
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| 58 | if ( value != NULL ) {
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| 59 | args[nargs] = ( *new string( value ) ).c_str(); // pass the argument along
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| 60 | #ifdef __DEBUG_H__
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| 61 | cerr << "env arg:\"" << args[nargs] << "\"" << endl;
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| 62 | #endif // __DEBUG_H__
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| 63 | nargs += 1;
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| 64 | } // if
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| 65 |
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| 66 | value = getenv( "__GCC_VERSION__" );
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| 67 | if ( value != NULL ) {
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| 68 | args[nargs] = ( *new string( value ) ).c_str(); // pass the argument along
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| 69 | #ifdef __DEBUG_H__
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| 70 | cerr << "env arg:\"" << args[nargs] << "\"" << endl;
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| 71 | #endif // __DEBUG_H__
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| 72 | nargs += 1;
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| 73 | } // if
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| 74 | } // checkEnv
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| 75 |
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| 76 |
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| 77 | void rmtmpfile() {
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| 78 | if ( unlink( tmpname ) == -1 ) { // remove tmpname
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| 79 | perror ( "CFA Translator error: cpp failed" );
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| 80 | exit( EXIT_FAILURE );
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| 81 | } // if
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| 82 | tmpfilefd = -1; // mark closed
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| 83 | } // rmtmpfile
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| 84 |
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| 85 |
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| 86 | void sigTermHandler( int signal ) {
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| 87 | if ( tmpfilefd != -1 ) { // RACE, file created ?
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| 88 | rmtmpfile(); // remove
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| 89 | exit( EXIT_FAILURE ); // terminate
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| 90 | } // if
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| 91 | } // sigTermHandler
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| 92 |
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| 93 |
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| 94 | void Stage1( const int argc, const char * const argv[] ) {
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| 95 | int code;
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| 96 | int i;
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| 97 |
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| 98 | string arg;
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| 99 | string bprefix;
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| 100 |
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| 101 | const char *cpp_in = NULL;
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| 102 | const char *cpp_out = NULL;
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| 103 |
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| 104 | bool CFA_flag = false;
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| 105 | bool cpp_flag = false;
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| 106 | const char *o_name = NULL;
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| 107 |
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| 108 | const char *args[argc + 100]; // leave space for 100 additional cpp command line values
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| 109 | int nargs = 1; // number of arguments in args list; 0 => command name
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| 110 | const char *uargs[20]; // leave space for 20 additional cfa-cpp command line values
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| 111 | int nuargs = 1; // 0 => command name
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| 112 |
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| 113 | signal( SIGINT, sigTermHandler );
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| 114 | signal( SIGTERM, sigTermHandler );
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| 115 |
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| 116 | // process all the arguments
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| 117 |
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| 118 | checkEnv( args, nargs ); // arguments passed via environment variables
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| 119 |
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| 120 | for ( i = 1; i < argc; i += 1 ) {
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| 121 | #ifdef __DEBUG_H__
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| 122 | cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
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| 123 | #endif // __DEBUG_H__
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| 124 | arg = argv[i];
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| 125 | #ifdef __DEBUG_H__
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| 126 | cerr << "arg:\"" << arg << "\"" << endl;
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| 127 | #endif // __DEBUG_H__
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| 128 | if ( prefix( arg, "-" ) ) {
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| 129 | // strip g++ flags that are inappropriate or cause duplicates in subsequent passes
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| 130 |
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| 131 | if ( arg == "-quiet" ) {
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| 132 | } else if ( arg == "-imultilib" || arg == "-imultiarch" ) {
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| 133 | i += 1; // and the argument
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| 134 | } else if ( prefix( arg, "-A" ) ) {
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| 135 | } else if ( prefix( arg, "-D__GNU" ) ) {
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| 136 | //********
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| 137 | // GCC 5.6.0 SEPARATED THE -D FROM THE ARGUMENT!
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| 138 | //********
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| 139 | } else if ( arg == "-D" && prefix( argv[i + 1], "__GNU" ) ) {
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| 140 | i += 1; // and the argument
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| 141 |
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| 142 | // strip flags controlling cpp step
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| 143 |
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| 144 | } else if ( arg == "-D__CPP__" ) {
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| 145 | cpp_flag = true;
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| 146 | } else if ( arg == "-D" && string( argv[i + 1] ) == "__CPP__" ) {
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| 147 | i += 1; // and the argument
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| 148 | cpp_flag = true;
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| 149 | } else if ( arg == "-D__CFA__" ) {
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| 150 | CFA_flag = true;
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| 151 | } else if ( arg == "-D" && string( argv[i + 1] ) == "__CFA__" ) {
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| 152 | i += 1; // and the argument
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| 153 | CFA_flag = true;
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| 154 | } else if ( prefix( arg, D__CFA_FLAGPREFIX__ ) ) {
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| 155 | uargs[nuargs] = ( *new string( arg.substr( D__CFA_FLAGPREFIX__.size() ) ) ).c_str();
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| 156 | nuargs += 1;
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| 157 | } else if ( arg == "-D" && prefix( argv[i + 1], D__CFA_FLAGPREFIX__.substr(2) ) ) {
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| 158 | uargs[nuargs] = ( *new string( string( argv[i + 1] ).substr( D__CFA_FLAGPREFIX__.size() - 2 ) ) ).c_str();
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| 159 | nuargs += 1;
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| 160 | i += 1; // and the argument
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| 161 | } else if ( prefix( arg, D__GCC_BPREFIX__ ) ) {
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| 162 | bprefix = arg.substr( D__GCC_BPREFIX__.size() );
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| 163 | } else if ( arg == "-D" && prefix( argv[i + 1], D__GCC_BPREFIX__.substr(2) ) ) {
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| 164 | bprefix = string( argv[i + 1] ).substr( D__GCC_BPREFIX__.size() - 2 );
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| 165 | i += 1; // and the argument
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| 166 |
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| 167 | // all other flags
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| 168 |
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| 169 | } else if ( arg == "-o" ) {
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| 170 | i += 1;
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| 171 | o_name = argv[i];
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| 172 | } else {
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| 173 | args[nargs] = argv[i]; // pass the flag along
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| 174 | nargs += 1;
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| 175 | // CPP flags with an argument
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| 176 | if ( arg == "-D" || arg == "-I" || arg == "-MF" || arg == "-MT" || arg == "-MQ" ||
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| 177 | arg == "-include" || arg == "-imacros" || arg == "-idirafter" || arg == "-iprefix" ||
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| 178 | arg == "-iwithprefix" || arg == "-iwithprefixbefore" || arg == "-isystem" || arg == "-isysroot" ) {
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| 179 | i += 1;
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| 180 | args[nargs] = argv[i]; // pass the argument along
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| 181 | nargs += 1;
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| 182 | #ifdef __DEBUG_H__
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| 183 | cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
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| 184 | #endif // __DEBUG_H__
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| 185 | } else if ( arg == "-MD" || arg == "-MMD" ) {
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| 186 | args[nargs] = "-MF"; // insert before file
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| 187 | nargs += 1;
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| 188 | i += 1;
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| 189 | args[nargs] = argv[i]; // pass the argument along
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| 190 | nargs += 1;
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| 191 | #ifdef __DEBUG_H__
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| 192 | cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
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| 193 | #endif // __DEBUG_H__
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| 194 | } // if
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| 195 | } // if
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| 196 | } else { // obtain input and possibly output files
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| 197 | if ( cpp_in == NULL ) {
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| 198 | cpp_in = argv[i];
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| 199 | #ifdef __DEBUG_H__
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| 200 | cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
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| 201 | #endif // __DEBUG_H__
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| 202 | } else if ( cpp_out == NULL ) {
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| 203 | cpp_out = argv[i];
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| 204 | #ifdef __DEBUG_H__
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| 205 | cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
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| 206 | #endif // __DEBUG_H__
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| 207 | } else {
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| 208 | cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
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| 209 | exit( EXIT_FAILURE );
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| 210 | } // if
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| 211 | } // if
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| 212 | } // for
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| 213 |
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| 214 | #ifdef __DEBUG_H__
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| 215 | cerr << "args:";
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| 216 | for ( i = 1; i < nargs; i += 1 ) {
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| 217 | cerr << " " << args[i];
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| 218 | } // for
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| 219 | if ( cpp_in != NULL ) cerr << " " << cpp_in;
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| 220 | if ( cpp_out != NULL ) cerr << " " << cpp_out;
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| 221 | cerr << endl;
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| 222 | #endif // __DEBUG_H__
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| 223 |
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| 224 | if ( cpp_in == NULL ) {
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| 225 | cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
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| 226 | exit( EXIT_FAILURE );
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| 227 | } // if
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| 228 |
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| 229 | if ( cpp_flag ) {
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| 230 | // The -E flag is specified on the cfa command so only run the preprocessor and output is written to standard
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| 231 | // output or -o. The call to cfa has a -E so it does not have to be added to the argument list.
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| 232 |
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| 233 | args[0] = compiler_name.c_str();
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| 234 | args[nargs] = cpp_in;
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| 235 | nargs += 1;
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| 236 | if ( o_name != NULL ) { // location for output
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| 237 | args[nargs] = "-o";
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| 238 | nargs += 1;
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| 239 | args[nargs] = o_name;
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| 240 | nargs += 1;
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| 241 | } // if
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| 242 | args[nargs] = NULL; // terminate argument list
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| 243 |
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| 244 | #ifdef __DEBUG_H__
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| 245 | cerr << "nargs: " << nargs << endl;
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| 246 | for ( i = 0; args[i] != NULL; i += 1 ) {
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| 247 | cerr << args[i] << " ";
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| 248 | } // for
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| 249 | cerr << endl;
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| 250 | #endif // __DEBUG_H__
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| 251 |
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| 252 | execvp( args[0], (char *const *)args ); // should not return
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| 253 | perror( "CFA Translator error: cpp level, execvp" );
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| 254 | exit( EXIT_FAILURE );
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| 255 | } // if
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| 256 |
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| 257 | // Create a temporary file to store output of the C preprocessor.
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| 258 |
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| 259 | tmpfilefd = mkstemp( tmpname );
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| 260 | if ( tmpfilefd == -1 ) {
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| 261 | perror( "CFA Translator error: cpp level, mkstemp" );
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| 262 | exit( EXIT_FAILURE );
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| 263 | } // if
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| 264 |
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| 265 | #ifdef __DEBUG_H__
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| 266 | cerr << "tmpname:" << tmpname << " tmpfilefd:" << tmpfilefd << endl;
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| 267 | #endif // __DEBUG_H__
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| 268 |
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| 269 | // Run the C preprocessor and save the output in tmpfile.
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| 270 |
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| 271 | if ( fork() == 0 ) { // child process ?
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| 272 | // -o xxx.ii cannot be used to write the output file from cpp because no output file is created if cpp detects
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| 273 | // an error (e.g., cannot find include file). Whereas, output is always generated, even when there is an error,
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| 274 | // when cpp writes to stdout. Hence, stdout is redirected into the temporary file.
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| 275 | if ( freopen( tmpname, "w", stdout ) == NULL ) { // redirect stdout to tmpname
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| 276 | perror( "CFA Translator error: cpp level, freopen" );
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| 277 | exit( EXIT_FAILURE );
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| 278 | } // if
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| 279 |
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| 280 | args[0] = compiler_name.c_str();
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| 281 | args[nargs] = cpp_in; // input to cpp
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| 282 | nargs += 1;
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| 283 | args[nargs] = NULL; // terminate argument list
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| 284 |
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| 285 | #ifdef __DEBUG_H__
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| 286 | cerr << "cpp nargs: " << nargs << endl;
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| 287 | for ( i = 0; args[i] != NULL; i += 1 ) {
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| 288 | cerr << args[i] << " ";
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| 289 | } // for
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| 290 | cerr << endl;
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| 291 | #endif // __DEBUG_H__
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| 292 |
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| 293 | execvp( args[0], (char *const *)args ); // should not return
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| 294 | perror( "CFA Translator error: cpp level, execvp" );
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| 295 | exit( EXIT_FAILURE );
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| 296 | } // if
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| 297 |
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| 298 | wait( &code ); // wait for child to finish
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| 299 |
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| 300 | #ifdef __DEBUG_H__
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| 301 | cerr << "return code from cpp:" << WEXITSTATUS(code) << endl;
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| 302 | #endif // __DEBUG_H__
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| 303 |
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| 304 | if ( WIFSIGNALED(code) != 0 ) { // child failed ?
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| 305 | rmtmpfile(); // remove tmpname
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| 306 | cerr << "CFA Translator error: cpp failed with signal " << WTERMSIG(code) << endl;
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| 307 | exit( EXIT_FAILURE );
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| 308 | } // if
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| 309 |
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| 310 | if ( WEXITSTATUS(code) != 0 ) { // child error ?
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| 311 | rmtmpfile(); // remove tmpname
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| 312 | exit( WEXITSTATUS( code ) ); // do not continue
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| 313 | } // if
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| 314 |
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| 315 | // If -CFA flag specified, run the cfa-cpp preprocessor on the temporary file, and output is written to standard
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| 316 | // output. Otherwise, run the cfa-cpp preprocessor on the temporary file and save the result into the output file.
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| 317 |
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| 318 | if ( fork() == 0 ) { // child runs CFA
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| 319 | uargs[0] = ( *new string( bprefix + "/cfa-cpp" ) ).c_str();
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| 320 |
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| 321 | uargs[nuargs] = "-p";
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| 322 | nuargs += 1;
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| 323 |
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| 324 | uargs[nuargs] = tmpname;
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| 325 | nuargs += 1;
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| 326 | if ( o_name != NULL ) {
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| 327 | uargs[nuargs] = o_name;
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| 328 | nuargs += 1;
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| 329 | } else if ( ! CFA_flag ) { // run cfa-cpp ?
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| 330 | uargs[nuargs] = cpp_out;
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| 331 | nuargs += 1;
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| 332 | } // if
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| 333 | uargs[nuargs] = NULL; // terminate argument list
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| 334 |
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| 335 | #ifdef __DEBUG_H__
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| 336 | cerr << "cfa-cpp nuargs: " << o_name << " " << CFA_flag << " " << nuargs << endl;
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| 337 | for ( i = 0; uargs[i] != NULL; i += 1 ) {
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| 338 | cerr << uargs[i] << " ";
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| 339 | } // for
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| 340 | cerr << endl;
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| 341 | #endif // __DEBUG_H__
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| 342 |
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| 343 | execvp( uargs[0], (char * const *)uargs ); // should not return
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| 344 | perror( "CFA Translator error: cpp level, execvp" );
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| 345 | exit( EXIT_FAILURE );
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| 346 | } // if
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| 347 |
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| 348 | wait( &code ); // wait for child to finish
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| 349 |
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| 350 | #ifdef __DEBUG_H__
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| 351 | cerr << "return code from cfa-cpp:" << WEXITSTATUS(code) << endl;
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| 352 | #endif // __DEBUG_H__
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| 353 |
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| 354 | // Must unlink here because file must exist across execvp.
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| 355 | rmtmpfile(); // remove tmpname
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| 356 |
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| 357 | if ( WIFSIGNALED(code) ) { // child failed ?
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| 358 | cerr << "CFA Translator error: cfa-cpp failed with signal " << WTERMSIG(code) << endl;
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| 359 | exit( EXIT_FAILURE );
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| 360 | } // if
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| 361 |
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| 362 | exit( WEXITSTATUS(code) );
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| 363 | } // Stage1
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| 364 |
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| 365 |
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| 366 | void Stage2( const int argc, const char * const * argv ) {
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| 367 | int i;
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| 368 |
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| 369 | string arg;
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| 370 |
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| 371 | const char *cpp_in = NULL;
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| 372 |
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| 373 | const char *args[argc + 100]; // leave space for 100 additional cfa command line values
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| 374 | int nargs = 1; // number of arguments in args list; 0 => command name
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| 375 |
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| 376 | // process all the arguments
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| 377 |
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| 378 | checkEnv( args, nargs ); // arguments passed via environment variables
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| 379 |
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| 380 | for ( i = 1; i < argc; i += 1 ) {
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| 381 | #ifdef __DEBUG_H__
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| 382 | cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
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| 383 | #endif // __DEBUG_H__
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| 384 | arg = argv[i];
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| 385 | #ifdef __DEBUG_H__
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| 386 | cerr << "arg:\"" << arg << "\"" << endl;
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| 387 | #endif // __DEBUG_H__
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| 388 | if ( prefix( arg, "-" ) ) {
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| 389 | // strip inappropriate flags
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| 390 |
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| 391 | if ( arg == "-quiet" || arg == "-version" || arg == "-fpreprocessed" ||
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| 392 | // Currently CFA does not suppose precompiled .h files.
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| 393 | prefix( arg, "--output-pch" ) ) {
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| 394 |
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| 395 | // strip inappropriate flags with an argument
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| 396 |
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| 397 | } else if ( arg == "-auxbase" || arg == "-auxbase-strip" || arg == "-dumpbase" ) {
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| 398 | i += 1;
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| 399 | #ifdef __DEBUG_H__
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| 400 | cerr << "arg:\"" << argv[i] << "\"" << endl;
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| 401 | #endif // __DEBUG_H__
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| 402 |
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| 403 | // all other flags
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| 404 |
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| 405 | } else {
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| 406 | args[nargs] = argv[i]; // pass the flag along
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| 407 | nargs += 1;
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| 408 | if ( arg == "-o" ) {
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| 409 | i += 1;
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| 410 | args[nargs] = argv[i]; // pass the argument along
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| 411 | nargs += 1;
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| 412 | #ifdef __DEBUG_H__
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| 413 | cerr << "arg:\"" << argv[i] << "\"" << endl;
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| 414 | #endif // __DEBUG_H__
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| 415 | } // if
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| 416 | } // if
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| 417 | } else { // obtain input and possibly output files
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| 418 | if ( cpp_in == NULL ) {
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| 419 | cpp_in = argv[i];
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| 420 | #ifdef __DEBUG_H__
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| 421 | cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
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| 422 | #endif // __DEBUG_H__
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| 423 | } else {
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| 424 | cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
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| 425 | exit( EXIT_FAILURE );
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| 426 | } // if
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| 427 | } // if
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| 428 | } // for
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| 429 |
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| 430 | #ifdef __DEBUG_H__
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| 431 | cerr << "args:";
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| 432 | for ( i = 1; i < nargs; i += 1 ) {
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| 433 | cerr << " " << args[i];
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| 434 | } // for
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| 435 | cerr << endl;
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| 436 | if ( cpp_in != NULL ) cerr << " " << cpp_in;
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| 437 | #endif // __DEBUG_H__
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| 438 |
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| 439 | args[0] = compiler_name.c_str();
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| 440 | args[nargs] = "-S"; // only compile and put assembler output in specified file
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| 441 | nargs += 1;
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| 442 | args[nargs] = cpp_in;
|
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| 443 | nargs += 1;
|
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| 444 | args[nargs] = NULL; // terminate argument list
|
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| 445 |
|
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| 446 | #ifdef __DEBUG_H__
|
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| 447 | cerr << "stage2 nargs: " << nargs << endl;
|
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| 448 | for ( i = 0; args[i] != NULL; i += 1 ) {
|
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| 449 | cerr << args[i] << " ";
|
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| 450 | } // for
|
|---|
| 451 | cerr << endl;
|
|---|
| 452 | #endif // __DEBUG_H__
|
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| 453 |
|
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| 454 | execvp( args[0], (char * const *)args ); // should not return
|
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| 455 | perror( "CFA Translator error: cpp level, execvp" );
|
|---|
| 456 | exit( EXIT_FAILURE ); // tell gcc not to go any further
|
|---|
| 457 | } // Stage2
|
|---|
| 458 |
|
|---|
| 459 |
|
|---|
| 460 | int main( const int argc, const char * const argv[], const char * const env[] ) {
|
|---|
| 461 | #ifdef __DEBUG_H__
|
|---|
| 462 | for ( int i = 0; env[i] != NULL; i += 1 ) {
|
|---|
| 463 | cerr << env[i] << endl;
|
|---|
| 464 | } // for
|
|---|
| 465 | #endif // __DEBUG_H__
|
|---|
| 466 |
|
|---|
| 467 | string arg = argv[1];
|
|---|
| 468 |
|
|---|
| 469 | // Currently, stage 1 starts with flag -E and stage 2 with flag -fpreprocessed.
|
|---|
| 470 |
|
|---|
| 471 | if ( arg == "-E" ) {
|
|---|
| 472 | #ifdef __DEBUG_H__
|
|---|
| 473 | cerr << "Stage1" << endl;
|
|---|
| 474 | #endif // __DEBUG_H__
|
|---|
| 475 | Stage1( argc, argv );
|
|---|
| 476 | } else if ( arg == "-fpreprocessed" ) {
|
|---|
| 477 | #ifdef __DEBUG_H__
|
|---|
| 478 | cerr << "Stage2" << endl;
|
|---|
| 479 | #endif // __DEBUG_H__
|
|---|
| 480 | Stage2( argc, argv );
|
|---|
| 481 | } else {
|
|---|
| 482 | cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
|
|---|
| 483 | exit( EXIT_FAILURE );
|
|---|
| 484 | } // if
|
|---|
| 485 | } // main
|
|---|
| 486 |
|
|---|
| 487 | // Local Variables: //
|
|---|
| 488 | // tab-width: 4 //
|
|---|
| 489 | // mode: c++ //
|
|---|
| 490 | // compile-command: "make install" //
|
|---|
| 491 | // End: //
|
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