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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- O S I N T --
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6 -- --
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7 -- S p e c --
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8 -- --
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131
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9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 -- This package contains the low level, operating system routines used in the
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27 -- compiler and binder for command line processing and file input output.
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28
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29 with Namet; use Namet;
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30 with Types; use Types;
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31
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32 with System; use System;
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33
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34 pragma Warnings (Off);
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35 -- This package is used also by gnatcoll
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36 with System.OS_Lib; use System.OS_Lib;
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37 pragma Warnings (On);
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38
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39 with System.Storage_Elements;
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40
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41 pragma Elaborate_All (System.OS_Lib);
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42 -- For the call to function Get_Target_Object_Suffix in the private part
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43
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44 package Osint is
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45
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46 Multi_Unit_Index_Character : constant Character := '~';
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47 -- The character before the index of the unit in a multi-unit source in ALI
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48 -- and object file names.
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49
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50 Ada_Include_Path : constant String := "ADA_INCLUDE_PATH";
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51 Ada_Objects_Path : constant String := "ADA_OBJECTS_PATH";
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52 Project_Include_Path_File : constant String := "ADA_PRJ_INCLUDE_FILE";
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53 Project_Objects_Path_File : constant String := "ADA_PRJ_OBJECTS_FILE";
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54
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55 Output_FD : File_Descriptor;
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56 -- File descriptor for current library info, list, tree, C, H, or binder
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57 -- output. Only one of these is open at a time, so we need only one FD.
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58
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59 procedure Initialize;
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60 -- Initialize internal tables
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61
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62 function Normalize_Directory_Name (Directory : String) return String_Ptr;
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63 -- Verify and normalize a directory name. If directory name is invalid,
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64 -- this will return an empty string. Otherwise it will insure a trailing
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65 -- slash and make other normalizations.
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66
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67 type File_Type is (Source, Library, Config, Definition, Preprocessing_Data);
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68
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69 function Find_File
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70 (N : File_Name_Type;
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71 T : File_Type;
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72 Full_Name : Boolean := False) return File_Name_Type;
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73 -- Finds a source, library or config file depending on the value of T
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74 -- following the directory search order rules unless N is the name of the
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75 -- file just read with Next_Main_File and already contains directory
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76 -- information, in which case just look in the Primary_Directory. Returns
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77 -- File_Name_Type of the full file name if found, No_File if file not
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78 -- found. Note that for the special case of gnat.adc, only the compilation
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79 -- environment directory is searched, i.e. the directory where the ali and
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80 -- object files are written. Another special case is Debug_Generated_Code
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81 -- set and the file name ends in ".dg", in which case we look for the
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82 -- generated file only in the current directory, since that is where it is
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83 -- always built.
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84 --
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85 -- In the case of configuration files, full path names are needed for some
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86 -- ASIS queries. The flag Full_Name indicates that the name of the file
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87 -- should be normalized to include a full path.
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88
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89 function Get_File_Names_Case_Sensitive return Int;
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90 pragma Import (C, Get_File_Names_Case_Sensitive,
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91 "__gnat_get_file_names_case_sensitive");
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92 File_Names_Case_Sensitive : constant Boolean :=
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93 Get_File_Names_Case_Sensitive /= 0;
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94 -- Set to indicate whether the operating system convention is for file
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95 -- names to be case sensitive (e.g., in Unix, set True), or non case
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96 -- sensitive (e.g., in Windows, set False).
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97
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98 procedure Canonical_Case_File_Name (S : in out String);
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99 -- Given a file name, converts it to canonical case form. For systems
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100 -- where file names are case sensitive, this procedure has no effect.
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101 -- If file names are not case sensitive (i.e. for example if you have
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102 -- the file "xyz.adb", you can refer to it as XYZ.adb or XyZ.AdB), then
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103 -- this call converts the given string to canonical all lower case form,
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104 -- so that two file names compare equal if they refer to the same file.
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105
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106 function Get_Env_Vars_Case_Sensitive return Int;
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107 pragma Import (C, Get_Env_Vars_Case_Sensitive,
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108 "__gnat_get_env_vars_case_sensitive");
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109 Env_Vars_Case_Sensitive : constant Boolean :=
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110 Get_Env_Vars_Case_Sensitive /= 0;
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111 -- Set to indicate whether the operating system convention is for
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112 -- environment variable names to be case sensitive (e.g., in Unix, set
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113 -- True), or non case sensitive (e.g., in Windows, set False).
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114
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115 procedure Canonical_Case_Env_Var_Name (S : in out String);
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116 -- Given an environment variable name, converts it to canonical case form.
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117 -- For systems where environment variable names are case sensitive, this
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118 -- procedure has no effect. If environment variable names are not case
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119 -- sensitive, then this call converts the given string to canonical all
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120 -- lower case form, so that two environment variable names compare equal if
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121 -- they refer to the same environment variable.
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122
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123 function Number_Of_Files return Nat;
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124 -- Gives the total number of filenames found on the command line
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125
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126 No_Index : constant := -1;
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127 -- Value used in Add_File to indicate no index is specified for main
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128
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129 procedure Add_File (File_Name : String; Index : Int := No_Index);
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130 -- Called by the subprogram processing the command line for each file name
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131 -- found. The index, when not defaulted to No_Index is the index of the
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132 -- subprogram in its source, zero indicating that the source is not
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133 -- multi-unit.
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134
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135 procedure Find_Program_Name;
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136 -- Put simple name of current program being run (excluding the directory
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137 -- path) in Name_Buffer, with the length in Name_Len.
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138
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139 function Program_Name (Nam : String; Prog : String) return String_Access;
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140 -- In the native compilation case, Create a string containing Nam. In the
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141 -- cross compilation case, looks at the prefix of the current program being
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142 -- run and prepend it to Nam. For instance if the program being run is
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143 -- <target>-gnatmake and Nam is "gcc", the returned value will be a pointer
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144 -- to "<target>-gcc". In the specific case where AAMP_On_Target is set, the
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145 -- name "gcc" is mapped to "gnaamp", and names of the form "gnat*" are
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146 -- mapped to "gnaamp*". This function clobbers Name_Buffer and Name_Len.
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147 -- Also look at any suffix, e.g. gnatmake-4.1 -> "gcc-4.1". Prog is the
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148 -- default name of the current program being executed, e.g. "gnatmake",
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149 -- "gnatlink".
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150
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151 procedure Write_Program_Name;
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152 -- Writes name of program as invoked to the current output (normally
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153 -- standard output).
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154
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155 procedure Fail (S : String);
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156 pragma No_Return (Fail);
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157 -- Outputs error message S preceded by the name of the executing program
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158 -- and exits with E_Fatal. The output goes to standard error, except if
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159 -- special output is in effect (see Output).
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160
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161 function Is_Directory_Separator (C : Character) return Boolean;
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162 -- Returns True if C is a directory separator
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163
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164 function Get_Directory (Name : File_Name_Type) return File_Name_Type;
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165 -- Get the prefix directory name (if any) from Name. The last separator
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166 -- is preserved. Return the normalized current directory if there is no
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167 -- directory part in the name.
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168
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169 function Is_Readonly_Library (File : File_Name_Type) return Boolean;
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170 -- Check if this library file is a read-only file
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171
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172 function Strip_Directory (Name : File_Name_Type) return File_Name_Type;
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173 -- Strips the prefix directory name (if any) from Name. Returns the
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174 -- stripped name. Name cannot end with a directory separator.
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175
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176 function Strip_Suffix (Name : File_Name_Type) return File_Name_Type;
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177 -- Strips the suffix (the last '.' and whatever comes after it) from Name.
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178 -- Returns the stripped name.
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179
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180 function Executable_Name
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181 (Name : File_Name_Type;
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182 Only_If_No_Suffix : Boolean := False) return File_Name_Type;
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183 -- Given a file name it adds the appropriate suffix at the end so that
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184 -- it becomes the name of the executable on the system at end. For
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185 -- instance under DOS it adds the ".exe" suffix, whereas under UNIX no
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186 -- suffix is added.
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187
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188 function Executable_Name
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189 (Name : String;
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190 Only_If_No_Suffix : Boolean := False) return String;
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191 -- Same as above, with String parameters
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192
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193 function File_Stamp (Name : File_Name_Type) return Time_Stamp_Type;
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194 -- Returns the time stamp of file Name. Name should include relative path
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195 -- information in order to locate it. If the source file cannot be opened,
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196 -- or Name = No_File, and all blank time stamp is returned (this is not an
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197 -- error situation).
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198
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199 function File_Stamp (Name : Path_Name_Type) return Time_Stamp_Type;
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200 -- Same as above for a path name
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201
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202 type String_Access_List is array (Positive range <>) of String_Access;
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203 -- Dereferenced type used to return a list of file specs in
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204 -- To_Canonical_File_List.
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205
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206 type String_Access_List_Access is access all String_Access_List;
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207 -- Type used to return a String_Access_List without dragging in secondary
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208 -- stack.
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209
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210 function To_Canonical_File_List
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211 (Wildcard_Host_File : String;
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212 Only_Dirs : Boolean) return String_Access_List_Access;
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213 -- Expand a wildcard host syntax file or directory specification and return
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214 -- a list of valid Unix syntax file or directory specs. If Only_Dirs is
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215 -- True, then only return directories.
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216
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217 function To_Host_Dir_Spec
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218 (Canonical_Dir : String;
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219 Prefix_Style : Boolean) return String_Access;
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220 -- Convert a canonical syntax directory specification to host syntax. The
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221 -- Prefix_Style flag is currently ignored but should be set to False.
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222 -- Note that the caller must free result.
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223
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224 function To_Host_File_Spec
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225 (Canonical_File : String) return String_Access;
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226 -- Convert a canonical syntax file specification to host syntax
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227
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228 function Relocate_Path
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229 (Prefix : String;
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230 Path : String) return String_Ptr;
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231 -- Given an absolute path and a prefix, if Path starts with Prefix,
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232 -- replace the Prefix substring with the root installation directory.
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233 -- By default, try to compute the root installation directory by looking
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234 -- at the executable name as it was typed on the command line and, if
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235 -- needed, use the PATH environment variable. If the above computation
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236 -- fails, return Path. This function assumes Prefix'First = Path'First.
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237
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238 function Shared_Lib (Name : String) return String;
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239 -- Returns the runtime shared library in the form -l<name>-<version> where
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240 -- version is the GNAT runtime library option for the platform. For example
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241 -- this routine called with Name set to "gnat" will return "-lgnat-5.02"
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242 -- on UNIX and Windows.
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243
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244 ---------------------
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245 -- File attributes --
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246 ---------------------
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247
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248 -- The following subprograms offer services similar to those found in
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249 -- System.OS_Lib, but with the ability to extra multiple information from
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250 -- a single system call, depending on the system. This can result in fewer
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251 -- system calls when reused.
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252
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253 -- In all these subprograms, the requested value is either read from the
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254 -- File_Attributes parameter (resulting in no system call), or computed
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255 -- from the disk and then cached in the File_Attributes parameter (possibly
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256 -- along with other values).
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257
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131
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258 File_Attributes_Size : constant Natural := 32;
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259 -- This should be big enough to fit a "struct file_attributes" on any
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260 -- system. It doesn't cause any malfunction if it is too big (which avoids
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261 -- the need for either mapping the struct exactly or importing the sizeof
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262 -- from C, which would result in dynamic code). However, it does waste
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263 -- space (e.g. when a component of this type appears in a record, if it is
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264 -- unnecessarily large). Note: for runtime units, use System.OS_Constants.
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265 -- SIZEOF_struct_file_attributes instead, which has the exact value.
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266
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267 type File_Attributes is
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268 array (1 .. File_Attributes_Size)
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269 of System.Storage_Elements.Storage_Element;
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270 for File_Attributes'Alignment use Standard'Maximum_Alignment;
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271
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272 Unknown_Attributes : File_Attributes;
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111
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273 -- A cache for various attributes for a file (length, accessibility,...)
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131
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274 -- Will be initialized properly at elaboration (for efficiency later on,
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275 -- avoid function calls every time we want to reset the attributes) prior
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276 -- to the first usage. We cannot make it constant since the compiler may
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277 -- put it in a read-only section.
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111
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278
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279 function Is_Directory
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280 (Name : C_File_Name;
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281 Attr : access File_Attributes) return Boolean;
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282 function Is_Regular_File
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283 (Name : C_File_Name;
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284 Attr : access File_Attributes) return Boolean;
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285 function Is_Symbolic_Link
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286 (Name : C_File_Name;
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287 Attr : access File_Attributes) return Boolean;
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288 -- Return the type of the file,
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289
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290 function File_Length
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291 (Name : C_File_Name;
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292 Attr : access File_Attributes) return Long_Integer;
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293 -- Return the length (number of bytes) of the file
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294
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295 function File_Time_Stamp
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296 (Name : C_File_Name;
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297 Attr : access File_Attributes) return OS_Time;
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298 function File_Time_Stamp
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299 (Name : Path_Name_Type;
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300 Attr : access File_Attributes) return Time_Stamp_Type;
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301 -- Return the time stamp of the file
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302
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303 function Is_Readable_File
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304 (Name : C_File_Name;
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305 Attr : access File_Attributes) return Boolean;
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306 function Is_Executable_File
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307 (Name : C_File_Name;
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308 Attr : access File_Attributes) return Boolean;
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309 function Is_Writable_File
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310 (Name : C_File_Name;
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311 Attr : access File_Attributes) return Boolean;
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312 -- Return the access rights for the file
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313
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314 -------------------------
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315 -- Search Dir Routines --
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316 -------------------------
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317
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318 function Include_Dir_Default_Prefix return String;
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319 -- Return the directory of the run-time library sources, as modified
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320 -- by update_path.
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321
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322 function Object_Dir_Default_Prefix return String;
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323 -- Return the directory of the run-time library ALI and object files, as
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324 -- modified by update_path.
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325
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326 procedure Add_Default_Search_Dirs;
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327 -- This routine adds the default search dirs indicated by the environment
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328 -- variables and sdefault package, as well as the library search dirs set
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329 -- by option -gnateO for GNAT2WHY.
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330
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331 procedure Add_Lib_Search_Dir (Dir : String);
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332 -- Add Dir at the end of the library file search path
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333
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334 procedure Add_Src_Search_Dir (Dir : String);
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335 -- Add Dir at the end of the source file search path
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336
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337 procedure Get_Next_Dir_In_Path_Init
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338 (Search_Path : String_Access);
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339 function Get_Next_Dir_In_Path
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340 (Search_Path : String_Access) return String_Access;
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341 -- These subprograms are used to parse out the directory names in a search
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342 -- path specified by a Search_Path argument. The procedure initializes an
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343 -- internal pointer to point to the initial directory name, and calls to
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344 -- the function return successive directory names, with a null pointer
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345 -- marking the end of the list.
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346
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347 type Search_File_Type is (Include, Objects);
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348
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349 procedure Add_Search_Dirs
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350 (Search_Path : String_Ptr;
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351 Path_Type : Search_File_Type);
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352 -- These procedure adds all the search directories that are in Search_Path
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353 -- in the proper file search path (library or source)
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354
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355 function Get_Primary_Src_Search_Directory return String_Ptr;
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356 -- Retrieved the primary directory (directory containing the main source
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357 -- file for Gnatmake.
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358
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359 function Nb_Dir_In_Src_Search_Path return Natural;
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360 function Dir_In_Src_Search_Path (Position : Natural) return String_Ptr;
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361 -- Functions to access the directory names in the source search path
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362
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363 function Nb_Dir_In_Obj_Search_Path return Natural;
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364 function Dir_In_Obj_Search_Path (Position : Natural) return String_Ptr;
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365 -- Functions to access the directory names in the Object search path
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366
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367 Include_Search_File : constant String_Access :=
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368 new String'("ada_source_path");
|
|
|
369 Objects_Search_File : constant String_Access :=
|
|
|
370 new String'("ada_object_path");
|
|
|
371 -- Names of the files containing the default include or objects search
|
|
|
372 -- directories. These files, located in Sdefault.Search_Dir_Prefix, do
|
|
|
373 -- not necessarily exist.
|
|
|
374
|
|
|
375 Exec_Name : String_Ptr;
|
|
|
376 -- Executable name as typed by the user (used to compute the
|
|
|
377 -- executable prefix).
|
|
|
378
|
|
|
379 function Read_Default_Search_Dirs
|
|
|
380 (Search_Dir_Prefix : String_Access;
|
|
|
381 Search_File : String_Access;
|
|
|
382 Search_Dir_Default_Name : String_Access) return String_Access;
|
|
|
383 -- Read and return the default search directories from the file located
|
|
|
384 -- in Search_Dir_Prefix (as modified by update_path) and named Search_File.
|
|
|
385 -- If no such file exists or an error occurs then instead return the
|
|
|
386 -- Search_Dir_Default_Name (as modified by update_path).
|
|
|
387
|
|
|
388 function Get_RTS_Search_Dir
|
|
|
389 (Search_Dir : String;
|
|
|
390 File_Type : Search_File_Type) return String_Ptr;
|
|
|
391 -- This function retrieves the paths to the search (resp. lib) dirs and
|
|
|
392 -- return them. The search dir can be absolute or relative. If the search
|
|
|
393 -- dir contains Include_Search_File (resp. Object_Search_File), then this
|
|
|
394 -- function reads and returns the default search directories from the file.
|
|
|
395 -- Otherwise, if the directory is absolute, it will try to find 'adalib'
|
|
|
396 -- (resp. 'adainclude'). If found, null is returned. If the directory is
|
|
|
397 -- relative, the following directories for the directories 'adalib' and
|
|
|
398 -- 'adainclude' will be scanned:
|
|
|
399 --
|
|
|
400 -- - current directory (from which the tool has been spawned)
|
|
|
401 -- - $GNAT_ROOT/gcc/gcc-lib/$targ/$vers/
|
|
|
402 -- - $GNAT_ROOT/gcc/gcc-lib/$targ/$vers/rts-
|
|
|
403 --
|
|
|
404 -- The scan will stop as soon as the directory being searched for (adalib
|
|
|
405 -- or adainclude) is found. If the scan fails, null is returned.
|
|
|
406
|
|
|
407 -----------------------
|
|
|
408 -- Source File Input --
|
|
|
409 -----------------------
|
|
|
410
|
|
|
411 -- Source file input routines are used by the compiler to read the main
|
|
|
412 -- source files and the subsidiary source files (e.g. with'ed units), and
|
|
|
413 -- also by the binder to check presence/time stamps of sources.
|
|
|
414
|
|
|
415 procedure Read_Source_File
|
|
|
416 (N : File_Name_Type;
|
|
|
417 Lo : Source_Ptr;
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|
|
418 Hi : out Source_Ptr;
|
|
|
419 Src : out Source_Buffer_Ptr;
|
|
|
420 FD : out File_Descriptor;
|
|
|
421 T : File_Type := Source);
|
|
|
422 -- Allocates a Source_Buffer of appropriate length and then reads the
|
|
|
423 -- entire contents of the source file N into the buffer. The address of
|
|
|
424 -- the allocated buffer is returned in Src. FD is used for extended error
|
|
|
425 -- information in the case the read fails.
|
|
|
426 --
|
|
|
427 -- Each line of text is terminated by one of the sequences:
|
|
|
428 --
|
|
|
429 -- CR
|
|
|
430 -- CR/LF
|
|
|
431 -- LF
|
|
|
432
|
|
|
433 -- The source is terminated by an EOF (16#1A#) character, which is the last
|
|
|
434 -- character of the returned source buffer (note that any EOF characters in
|
|
|
435 -- positions other than the last source character are treated as blanks).
|
|
|
436 --
|
|
|
437 -- The logical lower bound of the source buffer is the input value of Lo,
|
|
|
438 -- and on exit Hi is set to the logical upper bound of the source buffer,
|
|
|
439 -- which is redundant with Src'Last.
|
|
|
440 --
|
|
|
441 -- If the given file cannot be opened, then the action depends on whether
|
|
|
442 -- this file is the current main unit (i.e. its name matches the name
|
|
|
443 -- returned by the most recent call to Next_Main_Source). If so, then the
|
|
|
444 -- failure to find the file is a fatal error, an error message is output,
|
|
|
445 -- and program execution is terminated. Otherwise (for the case of a
|
|
|
446 -- subsidiary source loaded directly or indirectly using with), a file
|
|
|
447 -- not found condition causes null to be set as the result value and a
|
|
|
448 -- value of No_Source_File (0) to be set as the FD value. In the related
|
|
|
449 -- case of a file with no read permissions the result is the same except FD
|
|
|
450 -- is set to No_Access_To_Source_File (-1). Upon success FD is set to a
|
|
|
451 -- positive Source_File_Index.
|
|
|
452 --
|
|
|
453 -- Note that the name passed to this function is the simple file name,
|
|
|
454 -- without any directory information. The implementation is responsible
|
|
|
455 -- for searching for the file in the appropriate directories.
|
|
|
456 --
|
|
|
457 -- Note the special case that if the file name is gnat.adc, then the search
|
|
|
458 -- for the file is done ONLY in the directory corresponding to the current
|
|
|
459 -- compilation environment, i.e. in the same directory where the ali and
|
|
|
460 -- object files will be written.
|
|
|
461
|
|
|
462 function Full_Source_Name return File_Name_Type;
|
|
|
463 function Current_Source_File_Stamp return Time_Stamp_Type;
|
|
|
464 -- Returns the full name/time stamp of the source file most recently read
|
|
|
465 -- using Read_Source_File. Calling this routine entails no source file
|
|
|
466 -- directory lookup penalty.
|
|
|
467
|
|
|
468 procedure Full_Source_Name
|
|
|
469 (N : File_Name_Type;
|
|
|
470 Full_File : out File_Name_Type;
|
|
|
471 Attr : access File_Attributes);
|
|
|
472 function Full_Source_Name (N : File_Name_Type) return File_Name_Type;
|
|
|
473 function Source_File_Stamp (N : File_Name_Type) return Time_Stamp_Type;
|
|
|
474 -- Returns the full name/time stamp of the source file whose simple name
|
|
|
475 -- is N which should not include path information. Note that if the file
|
|
|
476 -- cannot be located No_File is returned for the first routine and an all
|
|
|
477 -- blank time stamp is returned for the second (this is not an error
|
|
|
478 -- situation). The full name includes appropriate directory information.
|
|
|
479 -- The source file directory lookup penalty is incurred every single time
|
|
|
480 -- the routines are called unless you have previously called
|
|
|
481 -- Source_File_Data (Cache => True). See below.
|
|
|
482 --
|
|
|
483 -- The procedural version also returns some file attributes for the ALI
|
|
|
484 -- file (to save on system calls later on).
|
|
|
485
|
|
|
486 function Current_File_Index return Int;
|
|
|
487 -- Return the index in its source file of the current main unit
|
|
|
488
|
|
|
489 function Matching_Full_Source_Name
|
|
|
490 (N : File_Name_Type;
|
|
|
491 T : Time_Stamp_Type) return File_Name_Type;
|
|
|
492 -- Same semantics than Full_Source_Name but will search on the source path
|
|
|
493 -- until a source file with time stamp matching T is found. If none is
|
|
|
494 -- found returns No_File.
|
|
|
495
|
|
|
496 procedure Source_File_Data (Cache : Boolean);
|
|
|
497 -- By default source file data (full source file name and time stamp)
|
|
|
498 -- are looked up every time a call to Full_Source_Name (N) or
|
|
|
499 -- Source_File_Stamp (N) is made. This may be undesirable in certain
|
|
|
500 -- applications as this is uselessly slow if source file data does not
|
|
|
501 -- change during program execution. When this procedure is called with
|
|
|
502 -- Cache => True access to source file data does not incur a penalty if
|
|
|
503 -- this data was previously retrieved.
|
|
|
504
|
|
|
505 procedure Dump_Source_File_Names;
|
|
|
506 -- Prints out the names of all source files that have been read by
|
|
|
507 -- Read_Source_File, except those that come from the run-time library
|
|
|
508 -- (i.e. Include_Dir_Default_Prefix). The text is sent to whatever Output
|
|
|
509 -- is currently using (e.g. standard output or standard error).
|
|
|
510
|
|
|
511 -------------------------------------------
|
|
|
512 -- Representation of Library Information --
|
|
|
513 -------------------------------------------
|
|
|
514
|
|
|
515 -- Associated with each compiled source file is library information, a
|
|
|
516 -- string of bytes whose exact format is described in the body of Lib.Writ.
|
|
|
517 -- Compiling a source file generates this library information for the
|
|
|
518 -- compiled unit, and access the library information for units that were
|
|
|
519 -- compiled previously on which the unit being compiled depends.
|
|
|
520
|
|
|
521 -- How this information is stored is up to the implementation of this
|
|
|
522 -- package. At the interface level, this information is simply associated
|
|
|
523 -- with its corresponding source.
|
|
|
524
|
|
|
525 -- Several different implementations are possible:
|
|
|
526
|
|
|
527 -- 1. The information could be directly associated with the source file,
|
|
|
528 -- e.g. placed in a resource fork of this file on the Mac, or on
|
|
|
529 -- MS-DOS, written to the source file after the end of file mark.
|
|
|
530
|
|
|
531 -- 2. The information could be written into the generated object module
|
|
|
532 -- if the system supports the inclusion of arbitrary informational
|
|
|
533 -- byte streams into object files. In this case there must be a naming
|
|
|
534 -- convention that allows object files to be located given the name of
|
|
|
535 -- the corresponding source file.
|
|
|
536
|
|
|
537 -- 3. The information could be written to a separate file, whose name is
|
|
|
538 -- related to the name of the source file by a fixed convention.
|
|
|
539
|
|
|
540 -- Which of these three methods is chosen depends on the constraints of the
|
|
|
541 -- host operating system. The interface described here is independent of
|
|
|
542 -- which of these approaches is used. Currently all versions of GNAT use
|
|
|
543 -- the third approach with a file name of xxx.ali where xxx is the source
|
|
|
544 -- file name.
|
|
|
545
|
|
|
546 -------------------------------
|
|
|
547 -- Library Information Input --
|
|
|
548 -------------------------------
|
|
|
549
|
|
|
550 -- These subprograms are used by the binder to read library information
|
|
|
551 -- files, see section above for representation of these files.
|
|
|
552
|
|
|
553 function Read_Library_Info
|
|
|
554 (Lib_File : File_Name_Type;
|
|
|
555 Fatal_Err : Boolean := False) return Text_Buffer_Ptr;
|
|
|
556 -- Allocates a Text_Buffer of appropriate length and reads in the entire
|
|
|
557 -- source of the library information from the library information file
|
|
|
558 -- whose name is given by the parameter Name.
|
|
|
559 --
|
|
|
560 -- See description of Read_Source_File for details on the format of the
|
|
|
561 -- returned text buffer (the format is identical). The lower bound of
|
|
|
562 -- the Text_Buffer is always zero
|
|
|
563 --
|
|
|
564 -- If the specified file cannot be opened, then the action depends on
|
|
|
565 -- Fatal_Err. If Fatal_Err is True, an error message is given and the
|
|
|
566 -- compilation is abandoned. Otherwise if Fatal_Err is False, then null
|
|
|
567 -- is returned. Note that the Lib_File is a simple name which does not
|
|
|
568 -- include any directory information. The implementation is responsible
|
|
|
569 -- for searching for the file in appropriate directories.
|
|
|
570 --
|
|
|
571 -- If Opt.Check_Object_Consistency is set to True then this routine checks
|
|
|
572 -- whether the object file corresponding to the Lib_File is consistent with
|
|
|
573 -- it. The object file is inconsistent if the object does not exist or if
|
|
|
574 -- it has an older time stamp than Lib_File. This check is not performed
|
|
|
575 -- when the Lib_File is "locked" (i.e. read/only) because in this case the
|
|
|
576 -- object file may be buried in a library. In case of inconsistencies
|
|
|
577 -- Read_Library_Info behaves as if it did not find Lib_File (namely if
|
|
|
578 -- Fatal_Err is False, null is returned).
|
|
|
579
|
|
|
580 function Read_Library_Info_From_Full
|
|
|
581 (Full_Lib_File : File_Name_Type;
|
|
|
582 Lib_File_Attr : access File_Attributes;
|
|
|
583 Fatal_Err : Boolean := False) return Text_Buffer_Ptr;
|
|
|
584 -- Same as Read_Library_Info, except Full_Lib_File must contains the full
|
|
|
585 -- path to the library file (instead of having Read_Library_Info recompute
|
|
|
586 -- it).
|
|
|
587 -- Lib_File_Attr should be an initialized set of attributes for the
|
|
|
588 -- library file (it can be initialized to Unknown_Attributes, but in
|
|
|
589 -- general will have been initialized by a previous call to Find_File).
|
|
|
590
|
|
|
591 function Full_Library_Info_Name return File_Name_Type;
|
|
|
592 function Full_Object_File_Name return File_Name_Type;
|
|
|
593 -- Returns the full name of the library/object file most recently read
|
|
|
594 -- using Read_Library_Info, including appropriate directory information.
|
|
|
595 -- Calling this routine entails no library file directory lookup
|
|
|
596 -- penalty. Note that the object file corresponding to a library file
|
|
|
597 -- is not actually read. Its time stamp is affected when the flag
|
|
|
598 -- Opt.Check_Object_Consistency is set.
|
|
|
599
|
|
|
600 function Current_Library_File_Stamp return Time_Stamp_Type;
|
|
|
601 function Current_Object_File_Stamp return Time_Stamp_Type;
|
|
|
602 -- The time stamps of the files returned by the previous two routines.
|
|
|
603 -- It is an error to call Current_Object_File_Stamp if
|
|
|
604 -- Opt.Check_Object_Consistency is set to False.
|
|
|
605
|
|
|
606 procedure Full_Lib_File_Name
|
|
|
607 (N : File_Name_Type;
|
|
|
608 Lib_File : out File_Name_Type;
|
|
|
609 Attr : out File_Attributes);
|
|
|
610 function Full_Lib_File_Name (N : File_Name_Type) return File_Name_Type;
|
|
|
611 -- Returns the full name of library file N. N should not include
|
|
|
612 -- path information. Note that if the file cannot be located No_File is
|
|
|
613 -- returned for the first routine and an all blank time stamp is returned
|
|
|
614 -- for the second (this is not an error situation). The full name includes
|
|
|
615 -- the appropriate directory information. The library file directory lookup
|
|
|
616 -- penalty is incurred every single time this routine is called.
|
|
|
617 -- The procedural version also returns some file attributes for the ALI
|
|
|
618 -- file (to save on system calls later on).
|
|
|
619
|
|
|
620 function Lib_File_Name
|
|
|
621 (Source_File : File_Name_Type;
|
|
|
622 Munit_Index : Nat := 0) return File_Name_Type;
|
|
|
623 -- Given the name of a source file, returns the name of the corresponding
|
|
|
624 -- library information file. This may be the name of the object file or of
|
|
|
625 -- a separate file used to store the library information. In the current
|
|
|
626 -- implementation, a separate file (the ALI file) is always used. In either
|
|
|
627 -- case the returned result is suitable for calling Read_Library_Info. The
|
|
|
628 -- Munit_Index is the unit index in multiple unit per file mode, or zero in
|
|
|
629 -- normal single unit per file mode (used to add ~nnn suffix). Note: this
|
|
|
630 -- subprogram is in this section because it is used by the compiler to
|
|
|
631 -- determine the proper library information names to be placed in the
|
|
|
632 -- generated library information file.
|
|
|
633
|
|
|
634 -----------------
|
|
|
635 -- Termination --
|
|
|
636 -----------------
|
|
|
637
|
|
|
638 Current_Exit_Status : Integer := 0;
|
|
|
639 -- Exit status that is set with procedure OS_Exit_Through_Exception below
|
|
|
640 -- and can be used in exception handler for Types.Terminate_Program to call
|
|
|
641 -- Set_Exit_Status as the last action of the program.
|
|
|
642
|
|
|
643 procedure OS_Exit_Through_Exception (Status : Integer);
|
|
|
644 pragma No_Return (OS_Exit_Through_Exception);
|
|
|
645 -- Set the Current_Exit_Status, then raise Types.Terminate_Program
|
|
|
646
|
|
|
647 type Exit_Code_Type is (
|
|
|
648 E_Success, -- No warnings or errors
|
|
|
649 E_Warnings, -- Compiler warnings generated
|
|
|
650 E_No_Code, -- No code generated
|
|
|
651 E_No_Compile, -- Compilation not needed (smart recompilation)
|
|
|
652 E_Errors, -- Compiler error messages generated
|
|
|
653 E_Fatal, -- Fatal (serious) error, e.g. source file not found
|
|
|
654 E_Abort); -- Internally detected compiler error
|
|
|
655
|
|
|
656 procedure Exit_Program (Exit_Code : Exit_Code_Type);
|
|
|
657 pragma No_Return (Exit_Program);
|
|
|
658 -- A call to Exit_Program terminates execution with the given status. A
|
|
|
659 -- status of zero indicates normal completion, a non-zero status indicates
|
|
|
660 -- abnormal termination.
|
|
|
661
|
|
|
662 -------------------------
|
|
|
663 -- Command Line Access --
|
|
|
664 -------------------------
|
|
|
665
|
|
|
666 -- Direct interface to command line parameters. (We don't want to use
|
|
|
667 -- the predefined command line package because it defines functions
|
|
|
668 -- returning string)
|
|
|
669
|
|
|
670 function Arg_Count return Natural;
|
|
|
671 pragma Import (C, Arg_Count, "__gnat_arg_count");
|
|
|
672 -- Get number of arguments (note: optional globbing may be enabled)
|
|
|
673
|
|
|
674 procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
|
|
|
675 pragma Import (C, Fill_Arg, "__gnat_fill_arg");
|
|
|
676 -- Store one argument
|
|
|
677
|
|
|
678 function Len_Arg (Arg_Num : Integer) return Integer;
|
|
|
679 pragma Import (C, Len_Arg, "__gnat_len_arg");
|
|
|
680 -- Get length of argument
|
|
|
681
|
|
|
682 ALI_Default_Suffix : constant String_Ptr := new String'("ali");
|
|
|
683 ALI_Suffix : String_Ptr := ALI_Default_Suffix;
|
|
|
684 -- The suffixes used for the ALI files
|
|
|
685
|
|
|
686 function Prep_Suffix return String;
|
|
|
687 -- The suffix used for preprocessed files
|
|
|
688
|
|
|
689 private
|
|
|
690
|
|
|
691 Current_Main : File_Name_Type := No_File;
|
|
|
692 -- Used to save a simple file name between calls to Next_Main_Source and
|
|
|
693 -- Read_Source_File. If the file name argument to Read_Source_File is
|
|
|
694 -- No_File, that indicates that the file whose name was returned by the
|
|
|
695 -- last call to Next_Main_Source (and stored here) is to be read.
|
|
|
696
|
|
|
697 Target_Object_Suffix : constant String := Get_Target_Object_Suffix.all;
|
|
|
698 -- The suffix used for the target object files
|
|
|
699
|
|
|
700 Output_File_Name : File_Name_Type;
|
|
|
701 -- File_Name_Type for name of open file whose FD is in Output_FD, the name
|
|
|
702 -- stored does not include the trailing NUL character.
|
|
|
703
|
|
|
704 Argument_Count : constant Integer := Arg_Count - 1;
|
|
|
705 -- Number of arguments (excluding program name)
|
|
|
706
|
|
|
707 type File_Name_Array is array (Int range <>) of String_Ptr;
|
|
|
708 type File_Name_Array_Ptr is access File_Name_Array;
|
|
|
709 File_Names : File_Name_Array_Ptr :=
|
|
|
710 new File_Name_Array (1 .. Int (Argument_Count) + 2);
|
|
|
711 -- As arguments are scanned, file names are stored in this array. The
|
|
|
712 -- strings do not have terminating NUL files. The array is extensible,
|
|
|
713 -- because when using project files, there may be more files than
|
|
|
714 -- arguments on the command line.
|
|
|
715
|
|
|
716 type File_Index_Array is array (Int range <>) of Int;
|
|
|
717 type File_Index_Array_Ptr is access File_Index_Array;
|
|
|
718 File_Indexes : File_Index_Array_Ptr :=
|
|
|
719 new File_Index_Array (1 .. Int (Argument_Count) + 2);
|
|
|
720
|
|
|
721 Current_File_Name_Index : Int := 0;
|
|
|
722 -- The index in File_Names of the last file opened by Next_Main_Source
|
|
|
723 -- or Next_Main_Lib_File. The value 0 indicates that no files have been
|
|
|
724 -- opened yet.
|
|
|
725
|
|
|
726 procedure Create_File_And_Check
|
|
|
727 (Fdesc : out File_Descriptor;
|
|
|
728 Fmode : Mode);
|
|
|
729 -- Create file whose name (NUL terminated) is in Name_Buffer (with the
|
|
|
730 -- length in Name_Len), and place the resulting descriptor in Fdesc. Issue
|
|
|
731 -- message and exit with fatal error if file cannot be created. The Fmode
|
|
|
732 -- parameter is set to either Text or Binary (for details see description
|
|
|
733 -- of System.OS_Lib.Create_File).
|
|
|
734
|
|
|
735 procedure Open_File_To_Append_And_Check
|
|
|
736 (Fdesc : out File_Descriptor;
|
|
|
737 Fmode : Mode);
|
|
|
738 -- Opens the file whose name (NUL terminated) is in Name_Buffer (with the
|
|
|
739 -- length in Name_Len), and place the resulting descriptor in Fdesc. Issue
|
|
|
740 -- message and exit with fatal error if file cannot be opened. The Fmode
|
|
|
741 -- parameter is set to either Text or Binary (for details see description
|
|
|
742 -- of System.OS_Lib.Open_Append).
|
|
|
743
|
|
|
744 type Program_Type is (Compiler, Binder, Make, Gnatls, Unspecified);
|
|
|
745 -- Program currently running
|
|
|
746 procedure Set_Program (P : Program_Type);
|
|
|
747 -- Indicates to the body of Osint the program currently running. This
|
|
|
748 -- procedure is called by the child packages of Osint. A check is made
|
|
|
749 -- that this procedure is not called more than once.
|
|
|
750
|
|
|
751 function More_Files return Boolean;
|
|
|
752 -- Implements More_Source_Files and More_Lib_Files
|
|
|
753
|
|
|
754 function Next_Main_File return File_Name_Type;
|
|
|
755 -- Implements Next_Main_Source and Next_Main_Lib_File
|
|
|
756
|
|
|
757 function Object_File_Name (N : File_Name_Type) return File_Name_Type;
|
|
|
758 -- Constructs the name of the object file corresponding to library file N.
|
|
|
759 -- If N is a full file name than the returned file name will also be a full
|
|
|
760 -- file name. Note that no lookup in the library file directories is done
|
|
|
761 -- for this file. This routine merely constructs the name.
|
|
|
762
|
|
|
763 procedure Write_Info (Info : String);
|
|
|
764 -- Implements Write_Binder_Info, Write_Debug_Info, and Write_Library_Info
|
|
|
765
|
|
|
766 procedure Write_With_Check (A : Address; N : Integer);
|
|
|
767 -- Writes N bytes from buffer starting at address A to file whose FD is
|
|
|
768 -- stored in Output_FD, and whose file name is stored as a File_Name_Type
|
|
|
769 -- in Output_File_Name. A check is made for disk full, and if this is
|
|
|
770 -- detected, the file being written is deleted, and a fatal error is
|
|
|
771 -- signalled.
|
|
|
772
|
|
|
773 end Osint;
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