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binutils-gdb/gdb/d-lang.c
Tom Tromey bb2ec1b34e the "compile" command 
This final patch adds the new "compile" command and subcommands, and
all the machinery needed to make it work.

A shared library supplied by gcc is used for all communications with
gcc.  Types and most aspects of symbols are provided directly by gdb
to the compiler using this library.

gdb provides some information about the user's code using plain text.
Macros are emitted this way, and DWARF location expressions (and
bounds for VLA) are compiled to C code.

This hybrid approach was taken because, on the one hand, it is better
to provide global declarations and such on demand; but on the other
hand, for local variables, translating DWARF location expressions to C
was much simpler than exporting a full compiler API to gdb -- the same
result, only easier to implement, understand, and debug.

In the ordinary mode, the user's expression is wrapped in a dummy
function.  After compilation, gdb inserts the resulting object code
into the inferior, then calls this function.

Access to local variables is provided by noting which registers are
used by location expressions, and passing a structure of register
values into the function.  Writes to registers are supported by
copying out these values after the function returns.

This approach was taken so that we could eventually implement other
more interesting features based on this same infrastructure; for
example, we're planning to investigate inferior-side breakpoint
conditions.

gdb/ChangeLog
2014-12-12  Phil Muldoon  <pmuldoon@redhat.com>
	    Jan Kratochvil  <jan.kratochvil@redhat.com>
	    Tom Tromey  <tromey@redhat.com>

	* NEWS: Update.
	* symtab.h (struct symbol_computed_ops) <generate_c_location>: New
	field.
	* p-lang.c (pascal_language_defn): Update.
	* opencl-lang.c (opencl_language_defn): Update.
	* objc-lang.c (objc_language_defn): Update.
	* m2-lang.c (m2_language_defn): Update.
	* language.h (struct language_defn) <la_get_compile_instance,
	la_compute_program>: New fields.
	* language.c (unknown_language_defn, auto_language_defn)
	(local_language_defn): Update.
	* jv-lang.c (java_language_defn): Update.
	* go-lang.c (go_language_defn): Update.
	* f-lang.c (f_language_defn): Update.
	* dwarf2loc.h (dwarf2_compile_property_to_c): Declare.
	* dwarf2loc.c (dwarf2_compile_property_to_c)
	(locexpr_generate_c_location, loclist_generate_c_location): New
	functions.
	(dwarf2_locexpr_funcs, dwarf2_loclist_funcs): Update.
	* defs.h (enum compile_i_scope_types): New.
	(enum command_control_type) <compile_control>: New constant.
	(struct command_line) <control_u>: New field.
	* d-lang.c (d_language_defn): Update.
	* compile/compile.c: New file.
	* compile/compile-c-support.c: New file.
	* compile/compile-c-symbols.c: New file.
	* compile/compile-c-types.c: New file.
	* compile/compile.h: New file.
	* compile/compile-internal.h: New file.
	* compile/compile-loc2c.c: New file.
	* compile/compile-object-load.c: New file.
	* compile/compile-object-load.h: New file.
	* compile/compile-object-run.c: New file.
	* compile/compile-object-run.h: New file.
	* cli/cli-script.c (multi_line_command_p, print_command_lines)
	(execute_control_command, process_next_line)
	(recurse_read_control_structure): Handle compile_control.
	* c-lang.h (c_get_compile_context, c_compute_program): Declare.
	* c-lang.c (c_language_defn, cplus_language_defn)
	(asm_language_defn, minimal_language_defn): Update.
	* ada-lang.c (ada_language_defn): Update.
	* Makefile.in (SUBDIR_GCC_COMPILE_OBS, SUBDIR_GCC_COMPILE_SRCS):
	New variables.
	(SFILES): Add SUBDIR_GCC_COMPILE_SRCS.
	(HFILES_NO_SRCDIR): Add compile.h.
	(COMMON_OBS): Add SUBDIR_GCC_COMPILE_OBS.
	(INIT_FILES): Add SUBDIR_GCC_COMPILE_SRCS.
	(compile.o, compile-c-types.o, compile-c-symbols.o)
	(compile-object-load.o, compile-object-run.o, compile-loc2c.o)
	(compile-c-support.o): New targets.

gdb/doc/ChangeLog
2014-12-12  Phil Muldoon  <pmuldoon@redhat.com>
	    Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.texinfo (Altering): Update.
	(Compiling and Injecting Code): New node.

gdb/testsuite/ChangeLog
2014-12-12  Phil Muldoon  <pmuldoon@redhat.com>
	    Jan Kratochvil  <jan.kratochvil@redhat.com>
	    Tom Tromey  <tromey@redhat.com>

	* configure.ac: Add gdb.compile/.
	* configure: Regenerate.
	* gdb.compile/Makefile.in: New file.
	* gdb.compile/compile-ops.exp: New file.
	* gdb.compile/compile-ops.c: New file.
	* gdb.compile/compile-tls.c: New file.
	* gdb.compile/compile-tls.exp: New file.
	* gdb.compile/compile-constvar.S: New file.
	* gdb.compile/compile-constvar.c: New file.
	* gdb.compile/compile-mod.c: New file.
	* gdb.compile/compile-nodebug.c: New file.
	* gdb.compile/compile-setjmp-mod.c: New file.
	* gdb.compile/compile-setjmp.c: New file.
	* gdb.compile/compile-setjmp.exp: New file.
	* gdb.compile/compile-shlib.c: New file.
	* gdb.compile/compile.c: New file.
	* gdb.compile/compile.exp: New file.
	* lib/gdb.exp (skip_compile_feature_tests): New proc.
2014-12-12 22:28:44 +01:00

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/* D language support routines for GDB, the GNU debugger.
Copyright (C) 2005-2014 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "symtab.h"
#include "language.h"
#include "varobj.h"
#include "d-lang.h"
#include "c-lang.h"
#include "demangle.h"
#include "cp-support.h"
/* The name of the symbol to use to get the name of the main subprogram. */
static const char D_MAIN[] = "D main";
/* Function returning the special symbol name used by D for the main
procedure in the main program if it is found in minimal symbol list.
This function tries to find minimal symbols so that it finds them even
if the program was compiled without debugging information. */
const char *
d_main_name (void)
{
struct bound_minimal_symbol msym;
msym = lookup_minimal_symbol (D_MAIN, NULL, NULL);
if (msym.minsym != NULL)
return D_MAIN;
/* No known entry procedure found, the main program is probably not D. */
return NULL;
}
/* Implements the la_demangle language_defn routine for language D. */
char *
d_demangle (const char *symbol, int options)
{
return gdb_demangle (symbol, options | DMGL_DLANG);
}
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
static const struct op_print d_op_print_tab[] =
{
{",", BINOP_COMMA, PREC_COMMA, 0},
{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
{"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
{"==", BINOP_EQUAL, PREC_ORDER, 0},
{"!=", BINOP_NOTEQUAL, PREC_ORDER, 0},
{"<=", BINOP_LEQ, PREC_ORDER, 0},
{">=", BINOP_GEQ, PREC_ORDER, 0},
{">", BINOP_GTR, PREC_ORDER, 0},
{"<", BINOP_LESS, PREC_ORDER, 0},
{">>", BINOP_RSH, PREC_SHIFT, 0},
{"<<", BINOP_LSH, PREC_SHIFT, 0},
{"+", BINOP_ADD, PREC_ADD, 0},
{"-", BINOP_SUB, PREC_ADD, 0},
{"~", BINOP_CONCAT, PREC_ADD, 0},
{"*", BINOP_MUL, PREC_MUL, 0},
{"/", BINOP_DIV, PREC_MUL, 0},
{"%", BINOP_REM, PREC_MUL, 0},
{"^^", BINOP_EXP, PREC_REPEAT, 0},
{"@", BINOP_REPEAT, PREC_REPEAT, 0},
{"-", UNOP_NEG, PREC_PREFIX, 0},
{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
{"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
{"*", UNOP_IND, PREC_PREFIX, 0},
{"&", UNOP_ADDR, PREC_PREFIX, 0},
{"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
{"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
{"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
{NULL, 0, 0, 0}
};
/* Mapping of all D basic data types into the language vector. */
enum d_primitive_types {
d_primitive_type_void,
d_primitive_type_bool,
d_primitive_type_byte,
d_primitive_type_ubyte,
d_primitive_type_short,
d_primitive_type_ushort,
d_primitive_type_int,
d_primitive_type_uint,
d_primitive_type_long,
d_primitive_type_ulong,
d_primitive_type_cent, /* Signed 128 bit integer. */
d_primitive_type_ucent, /* Unsigned 128 bit integer. */
d_primitive_type_float,
d_primitive_type_double,
d_primitive_type_real,
d_primitive_type_ifloat, /* Imaginary float types. */
d_primitive_type_idouble,
d_primitive_type_ireal,
d_primitive_type_cfloat, /* Complex number of two float values. */
d_primitive_type_cdouble,
d_primitive_type_creal,
d_primitive_type_char, /* Unsigned character types. */
d_primitive_type_wchar,
d_primitive_type_dchar,
nr_d_primitive_types
};
/* Implements the la_language_arch_info language_defn routine
for language D. */
static void
d_language_arch_info (struct gdbarch *gdbarch,
struct language_arch_info *lai)
{
const struct builtin_d_type *builtin = builtin_d_type (gdbarch);
lai->string_char_type = builtin->builtin_char;
lai->primitive_type_vector
= GDBARCH_OBSTACK_CALLOC (gdbarch, nr_d_primitive_types + 1,
struct type *);
lai->primitive_type_vector [d_primitive_type_void]
= builtin->builtin_void;
lai->primitive_type_vector [d_primitive_type_bool]
= builtin->builtin_bool;
lai->primitive_type_vector [d_primitive_type_byte]
= builtin->builtin_byte;
lai->primitive_type_vector [d_primitive_type_ubyte]
= builtin->builtin_ubyte;
lai->primitive_type_vector [d_primitive_type_short]
= builtin->builtin_short;
lai->primitive_type_vector [d_primitive_type_ushort]
= builtin->builtin_ushort;
lai->primitive_type_vector [d_primitive_type_int]
= builtin->builtin_int;
lai->primitive_type_vector [d_primitive_type_uint]
= builtin->builtin_uint;
lai->primitive_type_vector [d_primitive_type_long]
= builtin->builtin_long;
lai->primitive_type_vector [d_primitive_type_ulong]
= builtin->builtin_ulong;
lai->primitive_type_vector [d_primitive_type_cent]
= builtin->builtin_cent;
lai->primitive_type_vector [d_primitive_type_ucent]
= builtin->builtin_ucent;
lai->primitive_type_vector [d_primitive_type_float]
= builtin->builtin_float;
lai->primitive_type_vector [d_primitive_type_double]
= builtin->builtin_double;
lai->primitive_type_vector [d_primitive_type_real]
= builtin->builtin_real;
lai->primitive_type_vector [d_primitive_type_ifloat]
= builtin->builtin_ifloat;
lai->primitive_type_vector [d_primitive_type_idouble]
= builtin->builtin_idouble;
lai->primitive_type_vector [d_primitive_type_ireal]
= builtin->builtin_ireal;
lai->primitive_type_vector [d_primitive_type_cfloat]
= builtin->builtin_cfloat;
lai->primitive_type_vector [d_primitive_type_cdouble]
= builtin->builtin_cdouble;
lai->primitive_type_vector [d_primitive_type_creal]
= builtin->builtin_creal;
lai->primitive_type_vector [d_primitive_type_char]
= builtin->builtin_char;
lai->primitive_type_vector [d_primitive_type_wchar]
= builtin->builtin_wchar;
lai->primitive_type_vector [d_primitive_type_dchar]
= builtin->builtin_dchar;
lai->bool_type_symbol = "bool";
lai->bool_type_default = builtin->builtin_bool;
}
static const struct language_defn d_language_defn =
{
"d",
"D",
language_d,
range_check_off,
case_sensitive_on,
array_row_major,
macro_expansion_no,
&exp_descriptor_c,
d_parse,
d_error,
null_post_parser,
c_printchar, /* Print a character constant. */
c_printstr, /* Function to print string constant. */
c_emit_char, /* Print a single char. */
c_print_type, /* Print a type using appropriate syntax. */
c_print_typedef, /* Print a typedef using appropriate
syntax. */
d_val_print, /* Print a value using appropriate syntax. */
c_value_print, /* Print a top-level value. */
default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline. */
"this",
basic_lookup_symbol_nonlocal,
basic_lookup_transparent_type,
d_demangle, /* Language specific symbol demangler. */
NULL, /* Language specific
class_name_from_physname. */
d_op_print_tab, /* Expression operators for printing. */
1, /* C-style arrays. */
0, /* String lower bound. */
default_word_break_characters,
default_make_symbol_completion_list,
d_language_arch_info,
default_print_array_index,
default_pass_by_reference,
c_get_string,
NULL, /* la_get_symbol_name_cmp */
iterate_over_symbols,
&default_varobj_ops,
NULL,
NULL,
LANG_MAGIC
};
/* Build all D language types for the specified architecture. */
static void *
build_d_types (struct gdbarch *gdbarch)
{
struct builtin_d_type *builtin_d_type
= GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_d_type);
/* Basic types. */
builtin_d_type->builtin_void
= arch_type (gdbarch, TYPE_CODE_VOID, 1, "void");
builtin_d_type->builtin_bool
= arch_boolean_type (gdbarch, 8, 1, "bool");
builtin_d_type->builtin_byte
= arch_integer_type (gdbarch, 8, 0, "byte");
builtin_d_type->builtin_ubyte
= arch_integer_type (gdbarch, 8, 1, "ubyte");
builtin_d_type->builtin_short
= arch_integer_type (gdbarch, 16, 0, "short");
builtin_d_type->builtin_ushort
= arch_integer_type (gdbarch, 16, 1, "ushort");
builtin_d_type->builtin_int
= arch_integer_type (gdbarch, 32, 0, "int");
builtin_d_type->builtin_uint
= arch_integer_type (gdbarch, 32, 1, "uint");
builtin_d_type->builtin_long
= arch_integer_type (gdbarch, 64, 0, "long");
builtin_d_type->builtin_ulong
= arch_integer_type (gdbarch, 64, 1, "ulong");
builtin_d_type->builtin_cent
= arch_integer_type (gdbarch, 128, 0, "cent");
builtin_d_type->builtin_ucent
= arch_integer_type (gdbarch, 128, 1, "ucent");
builtin_d_type->builtin_float
= arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
"float", NULL);
builtin_d_type->builtin_double
= arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
"double", NULL);
builtin_d_type->builtin_real
= arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
"real", NULL);
TYPE_INSTANCE_FLAGS (builtin_d_type->builtin_byte)
|= TYPE_INSTANCE_FLAG_NOTTEXT;
TYPE_INSTANCE_FLAGS (builtin_d_type->builtin_ubyte)
|= TYPE_INSTANCE_FLAG_NOTTEXT;
/* Imaginary and complex types. */
builtin_d_type->builtin_ifloat
= arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
"ifloat", NULL);
builtin_d_type->builtin_idouble
= arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
"idouble", NULL);
builtin_d_type->builtin_ireal
= arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
"ireal", NULL);
builtin_d_type->builtin_cfloat
= arch_complex_type (gdbarch, "cfloat",
builtin_d_type->builtin_float);
builtin_d_type->builtin_cdouble
= arch_complex_type (gdbarch, "cdouble",
builtin_d_type->builtin_double);
builtin_d_type->builtin_creal
= arch_complex_type (gdbarch, "creal",
builtin_d_type->builtin_real);
/* Character types. */
builtin_d_type->builtin_char
= arch_character_type (gdbarch, 8, 1, "char");
builtin_d_type->builtin_wchar
= arch_character_type (gdbarch, 16, 1, "wchar");
builtin_d_type->builtin_dchar
= arch_character_type (gdbarch, 32, 1, "dchar");
return builtin_d_type;
}
static struct gdbarch_data *d_type_data;
/* Return the D type table for the specified architecture. */
const struct builtin_d_type *
builtin_d_type (struct gdbarch *gdbarch)
{
return gdbarch_data (gdbarch, d_type_data);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
extern initialize_file_ftype _initialize_d_language;
void
_initialize_d_language (void)
{
d_type_data = gdbarch_data_register_post_init (build_d_types);
add_language (&d_language_defn);
}
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