mirror of
https://sourceware.org/git/binutils-gdb.git
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bb2ec1b34e
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.
571 lines
20 KiB
C
571 lines
20 KiB
C
/* Source-language-related definitions for GDB.
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Copyright (C) 1991-2014 Free Software Foundation, Inc.
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Contributed by the Department of Computer Science at the State University
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of New York at Buffalo.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (LANGUAGE_H)
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#define LANGUAGE_H 1
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#include "symtab.h"
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/* Forward decls for prototypes. */
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struct value;
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struct objfile;
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struct frame_info;
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struct expression;
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struct ui_file;
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struct value_print_options;
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struct type_print_options;
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struct lang_varobj_ops;
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struct parser_state;
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struct compile_instance;
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#define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims. */
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/* range_mode ==
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range_mode_auto: range_check set automatically to default of language.
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range_mode_manual: range_check set manually by user. */
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extern enum range_mode
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{
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range_mode_auto, range_mode_manual
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}
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range_mode;
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/* range_check ==
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range_check_on: Ranges are checked in GDB expressions, producing errors.
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range_check_warn: Ranges are checked, producing warnings.
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range_check_off: Ranges are not checked in GDB expressions. */
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extern enum range_check
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{
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range_check_off, range_check_warn, range_check_on
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}
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range_check;
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/* case_mode ==
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case_mode_auto: case_sensitivity set upon selection of scope.
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case_mode_manual: case_sensitivity set only by user. */
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extern enum case_mode
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{
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case_mode_auto, case_mode_manual
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}
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case_mode;
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/* array_ordering ==
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array_row_major: Arrays are in row major order.
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array_column_major: Arrays are in column major order. */
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extern enum array_ordering
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{
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array_row_major, array_column_major
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}
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array_ordering;
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/* case_sensitivity ==
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case_sensitive_on: Case sensitivity in name matching is used.
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case_sensitive_off: Case sensitivity in name matching is not used. */
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extern enum case_sensitivity
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{
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case_sensitive_on, case_sensitive_off
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}
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case_sensitivity;
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/* macro_expansion ==
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macro_expansion_no: No macro expansion is available.
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macro_expansion_c: C-like macro expansion is available. */
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enum macro_expansion
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{
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macro_expansion_no, macro_expansion_c
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};
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/* Per architecture (OS/ABI) language information. */
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struct language_arch_info
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{
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/* Its primitive types. This is a vector ended by a NULL pointer.
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These types can be specified by name in parsing types in
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expressions, regardless of whether the program being debugged
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actually defines such a type. */
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struct type **primitive_type_vector;
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/* Type of elements of strings. */
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struct type *string_char_type;
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/* Symbol name of type to use as boolean type, if defined. */
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const char *bool_type_symbol;
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/* Otherwise, this is the default boolean builtin type. */
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struct type *bool_type_default;
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};
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/* A pointer to a function expected to return nonzero if
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SYMBOL_SEARCH_NAME matches the given LOOKUP_NAME.
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SYMBOL_SEARCH_NAME should be a symbol's "search" name.
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LOOKUP_NAME should be the name of an entity after it has been
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transformed for lookup. */
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typedef int (*symbol_name_cmp_ftype) (const char *symbol_search_name,
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const char *lookup_name);
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/* Structure tying together assorted information about a language. */
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struct language_defn
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{
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/* Name of the language. */
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const char *la_name;
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/* Natural or official name of the language. */
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const char *la_natural_name;
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/* its symtab language-enum (defs.h). */
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enum language la_language;
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/* Default range checking. */
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enum range_check la_range_check;
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/* Default case sensitivity. */
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enum case_sensitivity la_case_sensitivity;
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/* Multi-dimensional array ordering. */
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enum array_ordering la_array_ordering;
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/* Style of macro expansion, if any, supported by this language. */
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enum macro_expansion la_macro_expansion;
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/* Definitions related to expression printing, prefixifying, and
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dumping. */
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const struct exp_descriptor *la_exp_desc;
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/* Parser function. */
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int (*la_parser) (struct parser_state *);
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/* Parser error function. */
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void (*la_error) (char *);
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/* Given an expression *EXPP created by prefixifying the result of
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la_parser, perform any remaining processing necessary to complete
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its translation. *EXPP may change; la_post_parser is responsible
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for releasing its previous contents, if necessary. If
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VOID_CONTEXT_P, then no value is expected from the expression. */
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void (*la_post_parser) (struct expression ** expp, int void_context_p);
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void (*la_printchar) (int ch, struct type *chtype,
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struct ui_file * stream);
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void (*la_printstr) (struct ui_file * stream, struct type *elttype,
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const gdb_byte *string, unsigned int length,
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const char *encoding, int force_ellipses,
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const struct value_print_options *);
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void (*la_emitchar) (int ch, struct type *chtype,
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struct ui_file * stream, int quoter);
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/* Print a type using syntax appropriate for this language. */
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void (*la_print_type) (struct type *, const char *, struct ui_file *, int,
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int, const struct type_print_options *);
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/* Print a typedef using syntax appropriate for this language.
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TYPE is the underlying type. NEW_SYMBOL is the symbol naming
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the type. STREAM is the output stream on which to print. */
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void (*la_print_typedef) (struct type *type, struct symbol *new_symbol,
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struct ui_file *stream);
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/* Print a value using syntax appropriate for this language.
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TYPE is the type of the sub-object to be printed.
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CONTENTS holds the bits of the value. This holds the entire
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enclosing object.
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EMBEDDED_OFFSET is the offset into the outermost object of the
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sub-object represented by TYPE. This is the object which this
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call should print. Note that the enclosing type is not
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available.
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ADDRESS is the address in the inferior of the enclosing object.
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STREAM is the stream on which the value is to be printed.
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RECURSE is the recursion depth. It is zero-based.
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OPTIONS are the formatting options to be used when
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printing. */
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void (*la_val_print) (struct type *type,
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const gdb_byte *contents,
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int embedded_offset, CORE_ADDR address,
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struct ui_file *stream, int recurse,
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const struct value *val,
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const struct value_print_options *options);
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/* Print a top-level value using syntax appropriate for this language. */
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void (*la_value_print) (struct value *, struct ui_file *,
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const struct value_print_options *);
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/* Given a symbol VAR, and a stack frame id FRAME, read the value
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of the variable an return (pointer to a) struct value containing
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the value.
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Throw an error if the variable cannot be found. */
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struct value *(*la_read_var_value) (struct symbol *var,
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struct frame_info *frame);
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/* PC is possibly an unknown languages trampoline.
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If that PC falls in a trampoline belonging to this language,
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return the address of the first pc in the real function, or 0
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if it isn't a language tramp for this language. */
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CORE_ADDR (*skip_trampoline) (struct frame_info *, CORE_ADDR);
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/* Now come some hooks for lookup_symbol. */
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/* If this is non-NULL, specifies the name that of the implicit
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local variable that refers to the current object instance. */
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char *la_name_of_this;
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/* This is a function that lookup_symbol will call when it gets to
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the part of symbol lookup where C looks up static and global
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variables. */
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struct symbol *(*la_lookup_symbol_nonlocal) (const char *,
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const struct block *,
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const domain_enum);
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/* Find the definition of the type with the given name. */
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struct type *(*la_lookup_transparent_type) (const char *);
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/* Return demangled language symbol, or NULL. */
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char *(*la_demangle) (const char *mangled, int options);
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/* Return class name of a mangled method name or NULL. */
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char *(*la_class_name_from_physname) (const char *physname);
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/* Table for printing expressions. */
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const struct op_print *la_op_print_tab;
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/* Zero if the language has first-class arrays. True if there are no
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array values, and array objects decay to pointers, as in C. */
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char c_style_arrays;
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/* Index to use for extracting the first element of a string. */
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char string_lower_bound;
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/* The list of characters forming word boundaries. */
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char *(*la_word_break_characters) (void);
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/* Should return a vector of all symbols which are possible
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completions for TEXT. WORD is the entire command on which the
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completion is being made. If CODE is TYPE_CODE_UNDEF, then all
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symbols should be examined; otherwise, only STRUCT_DOMAIN
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symbols whose type has a code of CODE should be matched. */
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VEC (char_ptr) *(*la_make_symbol_completion_list) (const char *text,
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const char *word,
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enum type_code code);
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/* The per-architecture (OS/ABI) language information. */
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void (*la_language_arch_info) (struct gdbarch *,
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struct language_arch_info *);
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/* Print the index of an element of an array. */
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void (*la_print_array_index) (struct value *index_value,
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struct ui_file *stream,
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const struct value_print_options *options);
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/* Return non-zero if TYPE should be passed (and returned) by
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reference at the language level. */
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int (*la_pass_by_reference) (struct type *type);
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/* Obtain a string from the inferior, storing it in a newly allocated
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buffer in BUFFER, which should be freed by the caller. If the
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in- and out-parameter *LENGTH is specified at -1, the string is
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read until a null character of the appropriate width is found -
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otherwise the string is read to the length of characters specified.
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On completion, *LENGTH will hold the size of the string in characters.
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If a *LENGTH of -1 was specified it will count only actual
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characters, excluding any eventual terminating null character.
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Otherwise *LENGTH will include all characters - including any nulls.
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CHARSET will hold the encoding used in the string. */
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void (*la_get_string) (struct value *value, gdb_byte **buffer, int *length,
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struct type **chartype, const char **charset);
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/* Return a pointer to the function that should be used to match
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a symbol name against LOOKUP_NAME. This is mostly for languages
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such as Ada where the matching algorithm depends on LOOKUP_NAME.
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This field may be NULL, in which case strcmp_iw will be used
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to perform the matching. */
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symbol_name_cmp_ftype (*la_get_symbol_name_cmp) (const char *lookup_name);
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/* Find all symbols in the current program space matching NAME in
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DOMAIN, according to this language's rules.
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The search is done in BLOCK only.
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The caller is responsible for iterating up through superblocks
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if desired.
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For each one, call CALLBACK with the symbol and the DATA
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argument. If CALLBACK returns zero, the iteration ends at that
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point.
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This field may not be NULL. If the language does not need any
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special processing here, 'iterate_over_symbols' should be
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used as the definition. */
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void (*la_iterate_over_symbols) (const struct block *block,
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const char *name,
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domain_enum domain,
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symbol_found_callback_ftype *callback,
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void *data);
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/* Various operations on varobj. */
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const struct lang_varobj_ops *la_varobj_ops;
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/* If this language allows compilation from the gdb command line,
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this method should be non-NULL. When called it should return
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an instance of struct gcc_context appropriate to the language.
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When defined this method must never return NULL; instead it
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should throw an exception on failure. The returned compiler
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instance is owned by its caller and must be deallocated by
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calling its 'destroy' method. */
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struct compile_instance *(*la_get_compile_instance) (void);
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/* This method must be defined if 'la_get_gcc_context' is defined.
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If 'la_get_gcc_context' is not defined, then this method is
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ignored.
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This takes the user-supplied text and returns a newly malloc'd
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bit of code to compile. The caller owns the result.
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INST is the compiler instance being used.
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INPUT is the user's input text.
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GDBARCH is the architecture to use.
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EXPR_BLOCK is the block in which the expression is being
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parsed.
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EXPR_PC is the PC at which the expression is being parsed. */
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char *(*la_compute_program) (struct compile_instance *inst,
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const char *input,
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struct gdbarch *gdbarch,
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const struct block *expr_block,
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CORE_ADDR expr_pc);
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/* Add fields above this point, so the magic number is always last. */
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/* Magic number for compat checking. */
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long la_magic;
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};
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#define LANG_MAGIC 910823L
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/* Pointer to the language_defn for our current language. This pointer
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always points to *some* valid struct; it can be used without checking
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it for validity.
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The current language affects expression parsing and evaluation
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(FIXME: it might be cleaner to make the evaluation-related stuff
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separate exp_opcodes for each different set of semantics. We
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should at least think this through more clearly with respect to
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what happens if the language is changed between parsing and
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evaluation) and printing of things like types and arrays. It does
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*not* affect symbol-reading-- each source file in a symbol-file has
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its own language and we should keep track of that regardless of the
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language when symbols are read. If we want some manual setting for
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the language of symbol files (e.g. detecting when ".c" files are
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C++), it should be a separate setting from the current_language. */
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extern const struct language_defn *current_language;
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/* Pointer to the language_defn expected by the user, e.g. the language
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of main(), or the language we last mentioned in a message, or C. */
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extern const struct language_defn *expected_language;
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/* language_mode ==
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language_mode_auto: current_language automatically set upon selection
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of scope (e.g. stack frame)
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language_mode_manual: current_language set only by user. */
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extern enum language_mode
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{
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language_mode_auto, language_mode_manual
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}
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language_mode;
|
||
|
||
struct type *language_bool_type (const struct language_defn *l,
|
||
struct gdbarch *gdbarch);
|
||
|
||
struct type *language_string_char_type (const struct language_defn *l,
|
||
struct gdbarch *gdbarch);
|
||
|
||
struct type *language_lookup_primitive_type_by_name (const struct language_defn *l,
|
||
struct gdbarch *gdbarch,
|
||
const char *name);
|
||
|
||
|
||
/* These macros define the behaviour of the expression
|
||
evaluator. */
|
||
|
||
/* Should we range check values against the domain of their type? */
|
||
#define RANGE_CHECK (range_check != range_check_off)
|
||
|
||
/* "cast" really means conversion. */
|
||
/* FIXME -- should be a setting in language_defn. */
|
||
#define CAST_IS_CONVERSION(LANG) ((LANG)->la_language == language_c || \
|
||
(LANG)->la_language == language_cplus || \
|
||
(LANG)->la_language == language_objc)
|
||
|
||
extern void language_info (int);
|
||
|
||
extern enum language set_language (enum language);
|
||
|
||
|
||
/* This page contains functions that return things that are
|
||
specific to languages. Each of these functions is based on
|
||
the current setting of working_lang, which the user sets
|
||
with the "set language" command. */
|
||
|
||
#define LA_PRINT_TYPE(type,varstring,stream,show,level,flags) \
|
||
(current_language->la_print_type(type,varstring,stream,show,level,flags))
|
||
|
||
#define LA_PRINT_TYPEDEF(type,new_symbol,stream) \
|
||
(current_language->la_print_typedef(type,new_symbol,stream))
|
||
|
||
#define LA_VAL_PRINT(type,valaddr,offset,addr,stream,val,recurse,options) \
|
||
(current_language->la_val_print(type,valaddr,offset,addr,stream, \
|
||
val,recurse,options))
|
||
#define LA_VALUE_PRINT(val,stream,options) \
|
||
(current_language->la_value_print(val,stream,options))
|
||
|
||
#define LA_PRINT_CHAR(ch, type, stream) \
|
||
(current_language->la_printchar(ch, type, stream))
|
||
#define LA_PRINT_STRING(stream, elttype, string, length, encoding, force_ellipses, options) \
|
||
(current_language->la_printstr(stream, elttype, string, length, \
|
||
encoding, force_ellipses,options))
|
||
#define LA_EMIT_CHAR(ch, type, stream, quoter) \
|
||
(current_language->la_emitchar(ch, type, stream, quoter))
|
||
#define LA_GET_STRING(value, buffer, length, chartype, encoding) \
|
||
(current_language->la_get_string(value, buffer, length, chartype, encoding))
|
||
|
||
#define LA_PRINT_ARRAY_INDEX(index_value, stream, options) \
|
||
(current_language->la_print_array_index(index_value, stream, options))
|
||
|
||
#define LA_ITERATE_OVER_SYMBOLS(BLOCK, NAME, DOMAIN, CALLBACK, DATA) \
|
||
(current_language->la_iterate_over_symbols (BLOCK, NAME, DOMAIN, CALLBACK, \
|
||
DATA))
|
||
|
||
/* Test a character to decide whether it can be printed in literal form
|
||
or needs to be printed in another representation. For example,
|
||
in C the literal form of the character with octal value 141 is 'a'
|
||
and the "other representation" is '\141'. The "other representation"
|
||
is program language dependent. */
|
||
|
||
#define PRINT_LITERAL_FORM(c) \
|
||
((c) >= 0x20 \
|
||
&& ((c) < 0x7F || (c) >= 0xA0) \
|
||
&& (!sevenbit_strings || (c) < 0x80))
|
||
|
||
/* Type predicates */
|
||
|
||
extern int pointer_type (struct type *);
|
||
|
||
/* Error messages */
|
||
|
||
extern void range_error (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
|
||
|
||
/* Data: Does this value represent "truth" to the current language? */
|
||
|
||
extern int value_true (struct value *);
|
||
|
||
/* Misc: The string representing a particular enum language. */
|
||
|
||
extern enum language language_enum (char *str);
|
||
|
||
extern const struct language_defn *language_def (enum language);
|
||
|
||
extern const char *language_str (enum language);
|
||
|
||
/* Add a language to the set known by GDB (at initialization time). */
|
||
|
||
extern void add_language (const struct language_defn *);
|
||
|
||
extern enum language get_frame_language (void); /* In stack.c */
|
||
|
||
/* Check for a language-specific trampoline. */
|
||
|
||
extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
|
||
|
||
/* Return demangled language symbol, or NULL. */
|
||
extern char *language_demangle (const struct language_defn *current_language,
|
||
const char *mangled, int options);
|
||
|
||
/* Return class name from physname, or NULL. */
|
||
extern char *language_class_name_from_physname (const struct language_defn *,
|
||
const char *physname);
|
||
|
||
/* Splitting strings into words. */
|
||
extern char *default_word_break_characters (void);
|
||
|
||
/* Print the index of an array element using the C99 syntax. */
|
||
extern void default_print_array_index (struct value *index_value,
|
||
struct ui_file *stream,
|
||
const struct value_print_options *options);
|
||
|
||
/* Return non-zero if TYPE should be passed (and returned) by
|
||
reference at the language level. */
|
||
int language_pass_by_reference (struct type *type);
|
||
|
||
/* Return zero; by default, types are passed by value at the language
|
||
level. The target ABI may pass or return some structs by reference
|
||
independent of this. */
|
||
int default_pass_by_reference (struct type *type);
|
||
|
||
/* The default implementation of la_print_typedef. */
|
||
void default_print_typedef (struct type *type, struct symbol *new_symbol,
|
||
struct ui_file *stream);
|
||
|
||
void default_get_string (struct value *value, gdb_byte **buffer, int *length,
|
||
struct type **char_type, const char **charset);
|
||
|
||
void c_get_string (struct value *value, gdb_byte **buffer, int *length,
|
||
struct type **char_type, const char **charset);
|
||
|
||
#endif /* defined (LANGUAGE_H) */
|