gdb/compile/compile-internal.h

   1 /* Header file for GDB compile command and supporting functions.
   2    Copyright (C) 2014-2019 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #ifndef COMPILE_COMPILE_INTERNAL_H
  18 #define COMPILE_COMPILE_INTERNAL_H
  19
  20 #include "gcc-c-interface.h"
  21
  22 /* Debugging flag for the "compile" family of commands.  */
  23
  24 extern int compile_debug;
  25
  26 struct block;
  27
  28 /* An object that maps a gdb type to a gcc type.  */
  29
  30 struct type_map_instance
  31 {
  32   /* The gdb type.  */
  33
  34   struct type *type;
  35
  36   /* The corresponding gcc type handle.  */
  37
  38   gcc_type gcc_type_handle;
  39 };
  40
  41 /* An object of this type holds state associated with a given
  42    compilation job.  */
  43
  44 class compile_instance
  45 {
  46 public:
  47   compile_instance (struct gcc_base_context *gcc_fe, const char *options);
  48
  49   virtual ~compile_instance ()
  50   {
  51     m_gcc_fe->ops->destroy (m_gcc_fe);
  52   }
  53
  54   /* Returns the GCC options to be passed during compilation.  */
  55   const std::string &gcc_target_options () const
  56   {
  57     return m_gcc_target_options;
  58   }
  59
  60   /* Query the type cache for TYPE, returning the compiler's
  61      type for it in RET.  */
  62   bool get_cached_type (struct type *type, gcc_type *ret) const;
  63
  64   /* Insert GCC_TYPE into the type cache for TYPE.
  65
  66      It is ok for a given type to be inserted more than once, provided that
  67      the exact same association is made each time.  */
  68   void insert_type (struct type *type, gcc_type gcc_type);
  69
  70   /* Associate SYMBOL with some error text.  */
  71   void insert_symbol_error (const struct symbol *sym, const char *text);
  72
  73   /* Emit the error message corresponding to SYM, if one exists, and
  74      arrange for it not to be emitted again.  */
  75   void error_symbol_once (const struct symbol *sym);
  76
  77   /* These currently just forward to the underlying ops
  78      vtable.  */
  79
  80   /* Set the plug-in print callback.  */
  81   void set_print_callback (void (*print_function) (void *, const char *),
  82                            void *datum);
  83
  84   /* Return the plug-in's front-end version.  */
  85   unsigned int version () const;
  86
  87   /* Set the plug-in's verbosity level.  Nop for GCC_FE_VERSION_0.  */
  88   void set_verbose (int level);
  89
  90   /* Set the plug-in driver program.  Nop for GCC_FE_VERSION_0.  */
  91   void set_driver_filename (const char *filename);
  92
  93   /* Set the regular expression used to match the configury triplet
  94      prefix to the compiler.  Nop for GCC_FE_VERSION_0.  */
  95   void set_triplet_regexp (const char *regexp);
  96
  97   /* Set compilation arguments.  REGEXP is only used for protocol
  98      version GCC_FE_VERSION_0.  */
  99   char *set_arguments (int argc, char **argv, const char *regexp = NULL);
 100
 101   /* Set the filename of the program to compile.  Nop for GCC_FE_VERSION_0.  */
 102   void set_source_file (const char *filename);
 103
 104   /* Compile the previously specified source file to FILENAME.
 105      VERBOSE_LEVEL is only used for protocol version GCC_FE_VERSION_0.  */
 106   bool compile (const char *filename, int verbose_level = -1);
 107
 108   /* Set the scope type for this compile.  */
 109   void set_scope (enum compile_i_scope_types scope)
 110   {
 111     m_scope = scope;
 112   }
 113
 114   /* Return the scope type.  */
 115   enum compile_i_scope_types scope () const
 116   {
 117     return m_scope;
 118   }
 119
 120   /* Set the block to be used for symbol searches.  */
 121   void set_block (const struct block *block)
 122   {
 123     m_block = block;
 124   }
 125
 126   /* Return the search block.  */
 127   const struct block *block () const
 128   {
 129     return m_block;
 130   }
 131
 132 protected:
 133
 134   /* The GCC front end.  */
 135   struct gcc_base_context *m_gcc_fe;
 136
 137   /* The "scope" of this compilation.  */
 138   enum compile_i_scope_types m_scope;
 139
 140   /* The block in which an expression is being parsed.  */
 141   const struct block *m_block;
 142
 143   /* Specify "-std=gnu11", "-std=gnu++11" or similar.  These options are put
 144      after CU's DW_AT_producer compilation options to override them.  */
 145   std::string m_gcc_target_options;
 146
 147   /* Map from gdb types to gcc types.  */
 148   htab_up m_type_map;
 149
 150   /* Map from gdb symbols to gcc error messages to emit.  */
 151   htab_up m_symbol_err_map;
 152 };
 153
 154 /* Define header and footers for different scopes.  */
 155
 156 /* A simple scope just declares a function named "_gdb_expr", takes no
 157    arguments and returns no value.  */
 158
 159 #define COMPILE_I_SIMPLE_REGISTER_STRUCT_TAG "__gdb_regs"
 160 #define COMPILE_I_SIMPLE_REGISTER_ARG_NAME "__regs"
 161 #define COMPILE_I_SIMPLE_REGISTER_DUMMY "_dummy"
 162 #define COMPILE_I_PRINT_OUT_ARG_TYPE "void *"
 163 #define COMPILE_I_PRINT_OUT_ARG "__gdb_out_param"
 164 #define COMPILE_I_EXPR_VAL "__gdb_expr_val"
 165 #define COMPILE_I_EXPR_PTR_TYPE "__gdb_expr_ptr_type"
 166
 167 /* A "type" to indicate a NULL type.  */
 168
 169 const gcc_type GCC_TYPE_NONE = (gcc_type) -1;
 170
 171 /* Call gdbarch_register_name (GDBARCH, REGNUM) and convert its result
 172    to a form suitable for the compiler source.  The register names
 173    should not clash with inferior defined macros. */
 174
 175 extern std::string compile_register_name_mangled (struct gdbarch *gdbarch,
 176                                                   int regnum);
 177
 178 /* Convert compiler source register name to register number of
 179    GDBARCH.  Returned value is always >= 0, function throws an error
 180    for non-matching REG_NAME.  */
 181
 182 extern int compile_register_name_demangle (struct gdbarch *gdbarch,
 183                                            const char *reg_name);
 184
 185 /* Type used to hold and pass around the source and object file names
 186    to use for compilation.  */
 187 class compile_file_names
 188 {
 189 public:
 190   compile_file_names (std::string source_file, std::string object_file)
 191     : m_source_file (source_file), m_object_file (object_file)
 192   {}
 193
 194   /* Provide read-only views only.  Return 'const char *' instead of
 195      std::string to avoid having to use c_str() everywhere in client
 196      code.  */
 197
 198   const char *source_file () const
 199   { return m_source_file.c_str (); }
 200
 201   const char *object_file () const
 202   { return m_object_file.c_str (); }
 203
 204 private:
 205   /* Storage for the file names.  */
 206   std::string m_source_file;
 207   std::string m_object_file;
 208 };
 209
 210 #endif /* COMPILE_COMPILE_INTERNAL_H */