gdb/compile/compile-internal.h

   1 /* Header file for GDB compile command and supporting functions.
   2    Copyright (C) 2014-2018 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 GDB_COMPILE_INTERNAL_H
  18 #define GDB_COMPILE_INTERNAL_H
  19
  20 #include "hashtab.h"
  21 #include "gcc-c-interface.h"
  22 #include "common/enum-flags.h"
  23
  24 /* enum-flags wrapper.  */
  25 DEF_ENUM_FLAGS_TYPE (enum gcc_qualifiers, gcc_qualifiers_flags);
  26
  27 /* Debugging flag for the "compile" family of commands.  */
  28
  29 extern int compile_debug;
  30
  31 struct block;
  32
  33 /* An object of this type holds state associated with a given
  34    compilation job.  */
  35
  36 struct compile_instance
  37 {
  38   /* The GCC front end.  */
  39
  40   struct gcc_base_context *fe;
  41
  42   /* The "scope" of this compilation.  */
  43
  44   enum compile_i_scope_types scope;
  45
  46   /* The block in which an expression is being parsed.  */
  47
  48   const struct block *block;
  49
  50   /* Specify "-std=gnu11", "-std=gnu++11" or similar.  These options are put
  51      after CU's DW_AT_producer compilation options to override them.  */
  52
  53   const char *gcc_target_options;
  54
  55   /* How to destroy this object.  */
  56
  57   void (*destroy) (struct compile_instance *);
  58 };
  59
  60 /* A subclass of compile_instance that is specific to the C front
  61    end.  */
  62 struct compile_c_instance
  63 {
  64   /* Base class.  Note that the base class vtable actually points to a
  65      gcc_c_fe_vtable.  */
  66
  67   struct compile_instance base;
  68
  69   /* Map from gdb types to gcc types.  */
  70
  71   htab_t type_map;
  72
  73   /* Map from gdb symbols to gcc error messages to emit.  */
  74
  75   htab_t symbol_err_map;
  76 };
  77
  78 /* A helper macro that takes a compile_c_instance and returns its
  79    corresponding gcc_c_context.  */
  80
  81 #define C_CTX(I) ((struct gcc_c_context *) ((I)->base.fe))
  82
  83 /* Define header and footers for different scopes.  */
  84
  85 /* A simple scope just declares a function named "_gdb_expr", takes no
  86    arguments and returns no value.  */
  87
  88 #define COMPILE_I_SIMPLE_REGISTER_STRUCT_TAG "__gdb_regs"
  89 #define COMPILE_I_SIMPLE_REGISTER_ARG_NAME "__regs"
  90 #define COMPILE_I_SIMPLE_REGISTER_DUMMY "_dummy"
  91 #define COMPILE_I_PRINT_OUT_ARG_TYPE "void *"
  92 #define COMPILE_I_PRINT_OUT_ARG "__gdb_out_param"
  93 #define COMPILE_I_EXPR_VAL "__gdb_expr_val"
  94 #define COMPILE_I_EXPR_PTR_TYPE "__gdb_expr_ptr_type"
  95
  96 /* Call gdbarch_register_name (GDBARCH, REGNUM) and convert its result
  97    to a form suitable for the compiler source.  The register names
  98    should not clash with inferior defined macros. */
  99
 100 extern std::string compile_register_name_mangled (struct gdbarch *gdbarch,
 101                                                   int regnum);
 102
 103 /* Convert compiler source register name to register number of
 104    GDBARCH.  Returned value is always >= 0, function throws an error
 105    for non-matching REG_NAME.  */
 106
 107 extern int compile_register_name_demangle (struct gdbarch *gdbarch,
 108                                            const char *reg_name);
 109
 110 /* Convert a gdb type, TYPE, to a GCC type.  CONTEXT is used to do the
 111    actual conversion.  The new GCC type is returned.  */
 112
 113 struct type;
 114 extern gcc_type convert_type (struct compile_c_instance *context,
 115                               struct type *type);
 116
 117 /* A callback suitable for use as the GCC C symbol oracle.  */
 118
 119 extern gcc_c_oracle_function gcc_convert_symbol;
 120
 121 /* A callback suitable for use as the GCC C address oracle.  */
 122
 123 extern gcc_c_symbol_address_function gcc_symbol_address;
 124
 125 /* Instantiate a GDB object holding state for the GCC context FE.  The
 126    new object is returned.  */
 127
 128 extern struct compile_instance *new_compile_instance (struct gcc_c_context *fe);
 129
 130 /* Emit code to compute the address for all the local variables in
 131    scope at PC in BLOCK.  Returns a malloc'd vector, indexed by gdb
 132    register number, where each element indicates if the corresponding
 133    register is needed to compute a local variable.  */
 134
 135 extern unsigned char *generate_c_for_variable_locations
 136      (struct compile_c_instance *compiler,
 137       string_file &stream,
 138       struct gdbarch *gdbarch,
 139       const struct block *block,
 140       CORE_ADDR pc);
 141
 142 /* Get the GCC mode attribute value for a given type size.  */
 143
 144 extern const char *c_get_mode_for_size (int size);
 145
 146 /* Given a dynamic property, return a name that is used to represent
 147    its size.  The contents of the resulting string will be the same
 148    each time for each call with the same argument.  */
 149
 150 struct dynamic_prop;
 151 extern std::string c_get_range_decl_name (const struct dynamic_prop *prop);
 152
 153 /* Type used to hold and pass around the source and object file names
 154    to use for compilation.  */
 155 class compile_file_names
 156 {
 157 public:
 158   compile_file_names (std::string source_file, std::string object_file)
 159     : m_source_file (source_file), m_object_file (object_file)
 160   {}
 161
 162   /* Provide read-only views only.  Return 'const char *' instead of
 163      std::string to avoid having to use c_str() everywhere in client
 164      code.  */
 165
 166   const char *source_file () const
 167   { return m_source_file.c_str (); }
 168
 169   const char *object_file () const
 170   { return m_object_file.c_str (); }
 171
 172 private:
 173   /* Storage for the file names.  */
 174   std::string m_source_file;
 175   std::string m_object_file;
 176 };
 177
 178 #endif /* GDB_COMPILE_INTERNAL_H */