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.
1613 lines
42 KiB
C
1613 lines
42 KiB
C
/* Objective-C language support routines for GDB, the GNU debugger.
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Copyright (C) 2002-2014 Free Software Foundation, Inc.
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Contributed by Apple Computer, Inc.
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Written by Michael Snyder.
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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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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "varobj.h"
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#include "c-lang.h"
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#include "objc-lang.h"
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#include "complaints.h"
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#include "value.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "target.h" /* for target_has_execution */
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#include "gdbcore.h"
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#include "gdbcmd.h"
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#include "frame.h"
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#include "gdb_regex.h"
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#include "regcache.h"
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#include "block.h"
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#include "infcall.h"
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#include "valprint.h"
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#include "cli/cli-utils.h"
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#include <ctype.h>
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struct objc_object {
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CORE_ADDR isa;
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};
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struct objc_class {
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CORE_ADDR isa;
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CORE_ADDR super_class;
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CORE_ADDR name;
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long version;
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long info;
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long instance_size;
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CORE_ADDR ivars;
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CORE_ADDR methods;
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CORE_ADDR cache;
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CORE_ADDR protocols;
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};
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struct objc_super {
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CORE_ADDR receiver;
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CORE_ADDR class;
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};
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struct objc_method {
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CORE_ADDR name;
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CORE_ADDR types;
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CORE_ADDR imp;
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};
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static const struct objfile_data *objc_objfile_data;
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/* Lookup a structure type named "struct NAME", visible in lexical
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block BLOCK. If NOERR is nonzero, return zero if NAME is not
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suitably defined. */
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struct symbol *
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lookup_struct_typedef (char *name, const struct block *block, int noerr)
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{
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struct symbol *sym;
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sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0);
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if (sym == NULL)
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{
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if (noerr)
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return 0;
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else
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error (_("No struct type named %s."), name);
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}
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if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
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{
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if (noerr)
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return 0;
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else
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error (_("This context has class, union or enum %s, not a struct."),
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name);
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}
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return sym;
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}
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CORE_ADDR
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lookup_objc_class (struct gdbarch *gdbarch, char *classname)
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{
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struct type *char_type = builtin_type (gdbarch)->builtin_char;
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struct value * function, *classval;
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if (! target_has_execution)
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{
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/* Can't call into inferior to lookup class. */
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return 0;
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}
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if (lookup_minimal_symbol("objc_lookUpClass", 0, 0).minsym)
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function = find_function_in_inferior("objc_lookUpClass", NULL);
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else if (lookup_minimal_symbol ("objc_lookup_class", 0, 0).minsym)
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function = find_function_in_inferior("objc_lookup_class", NULL);
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else
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{
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complaint (&symfile_complaints,
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_("no way to lookup Objective-C classes"));
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return 0;
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}
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classval = value_string (classname, strlen (classname) + 1, char_type);
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classval = value_coerce_array (classval);
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return (CORE_ADDR) value_as_long (call_function_by_hand (function,
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1, &classval));
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}
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CORE_ADDR
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lookup_child_selector (struct gdbarch *gdbarch, char *selname)
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{
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struct type *char_type = builtin_type (gdbarch)->builtin_char;
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struct value * function, *selstring;
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if (! target_has_execution)
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{
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/* Can't call into inferior to lookup selector. */
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return 0;
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}
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if (lookup_minimal_symbol("sel_getUid", 0, 0).minsym)
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function = find_function_in_inferior("sel_getUid", NULL);
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else if (lookup_minimal_symbol ("sel_get_any_uid", 0, 0).minsym)
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function = find_function_in_inferior("sel_get_any_uid", NULL);
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else
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{
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complaint (&symfile_complaints,
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_("no way to lookup Objective-C selectors"));
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return 0;
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}
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selstring = value_coerce_array (value_string (selname,
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strlen (selname) + 1,
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char_type));
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return value_as_long (call_function_by_hand (function, 1, &selstring));
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}
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struct value *
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value_nsstring (struct gdbarch *gdbarch, char *ptr, int len)
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{
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struct type *char_type = builtin_type (gdbarch)->builtin_char;
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struct value *stringValue[3];
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struct value *function, *nsstringValue;
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struct symbol *sym;
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struct type *type;
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if (!target_has_execution)
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return 0; /* Can't call into inferior to create NSString. */
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stringValue[2] = value_string(ptr, len, char_type);
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stringValue[2] = value_coerce_array(stringValue[2]);
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/* _NSNewStringFromCString replaces "istr" after Lantern2A. */
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if (lookup_minimal_symbol("_NSNewStringFromCString", 0, 0).minsym)
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{
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function = find_function_in_inferior("_NSNewStringFromCString", NULL);
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nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
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}
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else if (lookup_minimal_symbol("istr", 0, 0).minsym)
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{
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function = find_function_in_inferior("istr", NULL);
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nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
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}
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else if (lookup_minimal_symbol("+[NSString stringWithCString:]", 0, 0).minsym)
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{
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function
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= find_function_in_inferior("+[NSString stringWithCString:]", NULL);
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type = builtin_type (gdbarch)->builtin_long;
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stringValue[0] = value_from_longest
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(type, lookup_objc_class (gdbarch, "NSString"));
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stringValue[1] = value_from_longest
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(type, lookup_child_selector (gdbarch, "stringWithCString:"));
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nsstringValue = call_function_by_hand(function, 3, &stringValue[0]);
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}
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else
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error (_("NSString: internal error -- no way to create new NSString"));
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sym = lookup_struct_typedef("NSString", 0, 1);
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if (sym == NULL)
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sym = lookup_struct_typedef("NXString", 0, 1);
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if (sym == NULL)
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type = builtin_type (gdbarch)->builtin_data_ptr;
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else
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type = lookup_pointer_type(SYMBOL_TYPE (sym));
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deprecated_set_value_type (nsstringValue, type);
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return nsstringValue;
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}
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/* Objective-C name demangling. */
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char *
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objc_demangle (const char *mangled, int options)
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{
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char *demangled, *cp;
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if (mangled[0] == '_' &&
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(mangled[1] == 'i' || mangled[1] == 'c') &&
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mangled[2] == '_')
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{
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cp = demangled = xmalloc(strlen(mangled) + 2);
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if (mangled[1] == 'i')
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*cp++ = '-'; /* for instance method */
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else
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*cp++ = '+'; /* for class method */
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*cp++ = '['; /* opening left brace */
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strcpy(cp, mangled+3); /* Tack on the rest of the mangled name. */
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while (*cp && *cp == '_')
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cp++; /* Skip any initial underbars in class
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name. */
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cp = strchr(cp, '_');
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if (!cp) /* Find first non-initial underbar. */
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{
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xfree(demangled); /* not mangled name */
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return NULL;
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}
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if (cp[1] == '_') /* Easy case: no category name. */
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{
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*cp++ = ' '; /* Replace two '_' with one ' '. */
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strcpy(cp, mangled + (cp - demangled) + 2);
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}
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else
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{
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*cp++ = '('; /* Less easy case: category name. */
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cp = strchr(cp, '_');
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if (!cp)
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{
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xfree(demangled); /* not mangled name */
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return NULL;
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}
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*cp++ = ')';
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*cp++ = ' '; /* Overwriting 1st char of method name... */
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strcpy(cp, mangled + (cp - demangled)); /* Get it back. */
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}
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while (*cp && *cp == '_')
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cp++; /* Skip any initial underbars in
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method name. */
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for (; *cp; cp++)
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if (*cp == '_')
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*cp = ':'; /* Replace remaining '_' with ':'. */
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*cp++ = ']'; /* closing right brace */
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*cp++ = 0; /* string terminator */
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return demangled;
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}
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else
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return NULL; /* Not an objc mangled name. */
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}
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/* Determine if we are currently in the Objective-C dispatch function.
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If so, get the address of the method function that the dispatcher
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would call and use that as the function to step into instead. Also
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skip over the trampoline for the function (if any). This is better
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for the user since they are only interested in stepping into the
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method function anyway. */
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static CORE_ADDR
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objc_skip_trampoline (struct frame_info *frame, CORE_ADDR stop_pc)
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{
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struct gdbarch *gdbarch = get_frame_arch (frame);
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CORE_ADDR real_stop_pc;
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CORE_ADDR method_stop_pc;
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real_stop_pc = gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc);
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if (real_stop_pc != 0)
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find_objc_msgcall (real_stop_pc, &method_stop_pc);
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else
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find_objc_msgcall (stop_pc, &method_stop_pc);
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if (method_stop_pc)
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{
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real_stop_pc = gdbarch_skip_trampoline_code
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(gdbarch, frame, method_stop_pc);
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if (real_stop_pc == 0)
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real_stop_pc = method_stop_pc;
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}
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return real_stop_pc;
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}
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/* Table mapping opcodes into strings for printing operators
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and precedences of the operators. */
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static const struct op_print objc_op_print_tab[] =
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{
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{",", BINOP_COMMA, PREC_COMMA, 0},
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{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
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{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
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{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
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{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
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{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
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{"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
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{"==", BINOP_EQUAL, PREC_EQUAL, 0},
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{"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
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{"<=", BINOP_LEQ, PREC_ORDER, 0},
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{">=", BINOP_GEQ, PREC_ORDER, 0},
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{">", BINOP_GTR, PREC_ORDER, 0},
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{"<", BINOP_LESS, PREC_ORDER, 0},
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{">>", BINOP_RSH, PREC_SHIFT, 0},
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{"<<", BINOP_LSH, PREC_SHIFT, 0},
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{"+", BINOP_ADD, PREC_ADD, 0},
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{"-", BINOP_SUB, PREC_ADD, 0},
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{"*", BINOP_MUL, PREC_MUL, 0},
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{"/", BINOP_DIV, PREC_MUL, 0},
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{"%", BINOP_REM, PREC_MUL, 0},
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{"@", BINOP_REPEAT, PREC_REPEAT, 0},
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{"-", UNOP_NEG, PREC_PREFIX, 0},
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{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
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{"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
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{"*", UNOP_IND, PREC_PREFIX, 0},
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{"&", UNOP_ADDR, PREC_PREFIX, 0},
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{"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
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{"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
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{"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
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{NULL, OP_NULL, PREC_NULL, 0}
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};
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const struct language_defn objc_language_defn = {
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"objective-c", /* Language name */
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"Objective-C",
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language_objc,
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range_check_off,
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case_sensitive_on,
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array_row_major,
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macro_expansion_c,
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&exp_descriptor_standard,
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c_parse,
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c_error,
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null_post_parser,
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c_printchar, /* Print a character constant */
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c_printstr, /* Function to print string constant */
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c_emit_char,
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c_print_type, /* Print a type using appropriate syntax */
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c_print_typedef, /* Print a typedef using appropriate syntax */
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c_val_print, /* Print a value using appropriate syntax */
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c_value_print, /* Print a top-level value */
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default_read_var_value, /* la_read_var_value */
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objc_skip_trampoline, /* Language specific skip_trampoline */
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"self", /* name_of_this */
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basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
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basic_lookup_transparent_type,/* lookup_transparent_type */
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objc_demangle, /* Language specific symbol demangler */
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NULL, /* Language specific
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class_name_from_physname */
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objc_op_print_tab, /* Expression operators for printing */
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1, /* C-style arrays */
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0, /* String lower bound */
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default_word_break_characters,
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default_make_symbol_completion_list,
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c_language_arch_info,
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default_print_array_index,
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default_pass_by_reference,
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default_get_string,
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NULL, /* la_get_symbol_name_cmp */
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iterate_over_symbols,
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&default_varobj_ops,
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NULL,
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NULL,
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LANG_MAGIC
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};
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/*
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* ObjC:
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* Following functions help construct Objective-C message calls.
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*/
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struct selname /* For parsing Objective-C. */
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|
{
|
|
struct selname *next;
|
|
char *msglist_sel;
|
|
int msglist_len;
|
|
};
|
|
|
|
static int msglist_len;
|
|
static struct selname *selname_chain;
|
|
static char *msglist_sel;
|
|
|
|
void
|
|
start_msglist(void)
|
|
{
|
|
struct selname *new =
|
|
(struct selname *) xmalloc (sizeof (struct selname));
|
|
|
|
new->next = selname_chain;
|
|
new->msglist_len = msglist_len;
|
|
new->msglist_sel = msglist_sel;
|
|
msglist_len = 0;
|
|
msglist_sel = (char *)xmalloc(1);
|
|
*msglist_sel = 0;
|
|
selname_chain = new;
|
|
}
|
|
|
|
void
|
|
add_msglist(struct stoken *str, int addcolon)
|
|
{
|
|
char *s;
|
|
const char *p;
|
|
int len, plen;
|
|
|
|
if (str == 0) /* Unnamed arg, or... */
|
|
{
|
|
if (addcolon == 0) /* variable number of args. */
|
|
{
|
|
msglist_len++;
|
|
return;
|
|
}
|
|
p = "";
|
|
plen = 0;
|
|
}
|
|
else
|
|
{
|
|
p = str->ptr;
|
|
plen = str->length;
|
|
}
|
|
len = plen + strlen(msglist_sel) + 2;
|
|
s = (char *)xmalloc(len);
|
|
strcpy(s, msglist_sel);
|
|
strncat(s, p, plen);
|
|
xfree(msglist_sel);
|
|
msglist_sel = s;
|
|
if (addcolon)
|
|
{
|
|
s[len-2] = ':';
|
|
s[len-1] = 0;
|
|
msglist_len++;
|
|
}
|
|
else
|
|
s[len-2] = '\0';
|
|
}
|
|
|
|
int
|
|
end_msglist (struct parser_state *ps)
|
|
{
|
|
int val = msglist_len;
|
|
struct selname *sel = selname_chain;
|
|
char *p = msglist_sel;
|
|
CORE_ADDR selid;
|
|
|
|
selname_chain = sel->next;
|
|
msglist_len = sel->msglist_len;
|
|
msglist_sel = sel->msglist_sel;
|
|
selid = lookup_child_selector (parse_gdbarch (ps), p);
|
|
if (!selid)
|
|
error (_("Can't find selector \"%s\""), p);
|
|
write_exp_elt_longcst (ps, selid);
|
|
xfree(p);
|
|
write_exp_elt_longcst (ps, val); /* Number of args */
|
|
xfree(sel);
|
|
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Function: specialcmp (const char *a, const char *b)
|
|
*
|
|
* Special strcmp: treats ']' and ' ' as end-of-string.
|
|
* Used for qsorting lists of objc methods (either by class or selector).
|
|
*/
|
|
|
|
static int
|
|
specialcmp (const char *a, const char *b)
|
|
{
|
|
while (*a && *a != ' ' && *a != ']' && *b && *b != ' ' && *b != ']')
|
|
{
|
|
if (*a != *b)
|
|
return *a - *b;
|
|
a++, b++;
|
|
}
|
|
if (*a && *a != ' ' && *a != ']')
|
|
return 1; /* a is longer therefore greater. */
|
|
if (*b && *b != ' ' && *b != ']')
|
|
return -1; /* a is shorter therefore lesser. */
|
|
return 0; /* a and b are identical. */
|
|
}
|
|
|
|
/*
|
|
* Function: compare_selectors (const void *, const void *)
|
|
*
|
|
* Comparison function for use with qsort. Arguments are symbols or
|
|
* msymbols Compares selector part of objc method name alphabetically.
|
|
*/
|
|
|
|
static int
|
|
compare_selectors (const void *a, const void *b)
|
|
{
|
|
const char *aname, *bname;
|
|
|
|
aname = SYMBOL_PRINT_NAME (*(struct symbol **) a);
|
|
bname = SYMBOL_PRINT_NAME (*(struct symbol **) b);
|
|
if (aname == NULL || bname == NULL)
|
|
error (_("internal: compare_selectors(1)"));
|
|
|
|
aname = strchr(aname, ' ');
|
|
bname = strchr(bname, ' ');
|
|
if (aname == NULL || bname == NULL)
|
|
error (_("internal: compare_selectors(2)"));
|
|
|
|
return specialcmp (aname+1, bname+1);
|
|
}
|
|
|
|
/*
|
|
* Function: selectors_info (regexp, from_tty)
|
|
*
|
|
* Implements the "Info selectors" command. Takes an optional regexp
|
|
* arg. Lists all objective c selectors that match the regexp. Works
|
|
* by grepping thru all symbols for objective c methods. Output list
|
|
* is sorted and uniqued.
|
|
*/
|
|
|
|
static void
|
|
selectors_info (char *regexp, int from_tty)
|
|
{
|
|
struct objfile *objfile;
|
|
struct minimal_symbol *msymbol;
|
|
const char *name;
|
|
char *val;
|
|
int matches = 0;
|
|
int maxlen = 0;
|
|
int ix;
|
|
char myregexp[2048];
|
|
char asel[256];
|
|
struct symbol **sym_arr;
|
|
int plusminus = 0;
|
|
|
|
if (regexp == NULL)
|
|
strcpy(myregexp, ".*]"); /* Null input, match all objc methods. */
|
|
else
|
|
{
|
|
if (*regexp == '+' || *regexp == '-')
|
|
{ /* User wants only class methods or only instance methods. */
|
|
plusminus = *regexp++;
|
|
while (*regexp == ' ' || *regexp == '\t')
|
|
regexp++;
|
|
}
|
|
if (*regexp == '\0')
|
|
strcpy(myregexp, ".*]");
|
|
else
|
|
{
|
|
/* Allow a few extra bytes because of the strcat below. */
|
|
if (sizeof (myregexp) < strlen (regexp) + 4)
|
|
error (_("Regexp is too long: %s"), regexp);
|
|
strcpy(myregexp, regexp);
|
|
if (myregexp[strlen(myregexp) - 1] == '$') /* end of selector */
|
|
myregexp[strlen(myregexp) - 1] = ']'; /* end of method name */
|
|
else
|
|
strcat(myregexp, ".*]");
|
|
}
|
|
}
|
|
|
|
if (regexp != NULL)
|
|
{
|
|
val = re_comp (myregexp);
|
|
if (val != 0)
|
|
error (_("Invalid regexp (%s): %s"), val, regexp);
|
|
}
|
|
|
|
/* First time thru is JUST to get max length and count. */
|
|
ALL_MSYMBOLS (objfile, msymbol)
|
|
{
|
|
QUIT;
|
|
name = MSYMBOL_NATURAL_NAME (msymbol);
|
|
if (name
|
|
&& (name[0] == '-' || name[0] == '+')
|
|
&& name[1] == '[') /* Got a method name. */
|
|
{
|
|
/* Filter for class/instance methods. */
|
|
if (plusminus && name[0] != plusminus)
|
|
continue;
|
|
/* Find selector part. */
|
|
name = (char *) strchr (name+2, ' ');
|
|
if (name == NULL)
|
|
{
|
|
complaint (&symfile_complaints,
|
|
_("Bad method name '%s'"),
|
|
MSYMBOL_NATURAL_NAME (msymbol));
|
|
continue;
|
|
}
|
|
if (regexp == NULL || re_exec(++name) != 0)
|
|
{
|
|
const char *mystart = name;
|
|
const char *myend = strchr (mystart, ']');
|
|
|
|
if (myend && (myend - mystart > maxlen))
|
|
maxlen = myend - mystart; /* Get longest selector. */
|
|
matches++;
|
|
}
|
|
}
|
|
}
|
|
if (matches)
|
|
{
|
|
printf_filtered (_("Selectors matching \"%s\":\n\n"),
|
|
regexp ? regexp : "*");
|
|
|
|
sym_arr = alloca (matches * sizeof (struct symbol *));
|
|
matches = 0;
|
|
ALL_MSYMBOLS (objfile, msymbol)
|
|
{
|
|
QUIT;
|
|
name = MSYMBOL_NATURAL_NAME (msymbol);
|
|
if (name &&
|
|
(name[0] == '-' || name[0] == '+') &&
|
|
name[1] == '[') /* Got a method name. */
|
|
{
|
|
/* Filter for class/instance methods. */
|
|
if (plusminus && name[0] != plusminus)
|
|
continue;
|
|
/* Find selector part. */
|
|
name = (char *) strchr(name+2, ' ');
|
|
if (regexp == NULL || re_exec(++name) != 0)
|
|
sym_arr[matches++] = (struct symbol *) msymbol;
|
|
}
|
|
}
|
|
|
|
qsort (sym_arr, matches, sizeof (struct minimal_symbol *),
|
|
compare_selectors);
|
|
/* Prevent compare on first iteration. */
|
|
asel[0] = 0;
|
|
for (ix = 0; ix < matches; ix++) /* Now do the output. */
|
|
{
|
|
char *p = asel;
|
|
|
|
QUIT;
|
|
name = SYMBOL_NATURAL_NAME (sym_arr[ix]);
|
|
name = strchr (name, ' ') + 1;
|
|
if (p[0] && specialcmp(name, p) == 0)
|
|
continue; /* Seen this one already (not unique). */
|
|
|
|
/* Copy selector part. */
|
|
while (*name && *name != ']')
|
|
*p++ = *name++;
|
|
*p++ = '\0';
|
|
/* Print in columns. */
|
|
puts_filtered_tabular(asel, maxlen + 1, 0);
|
|
}
|
|
begin_line();
|
|
}
|
|
else
|
|
printf_filtered (_("No selectors matching \"%s\"\n"),
|
|
regexp ? regexp : "*");
|
|
}
|
|
|
|
/*
|
|
* Function: compare_classes (const void *, const void *)
|
|
*
|
|
* Comparison function for use with qsort. Arguments are symbols or
|
|
* msymbols Compares class part of objc method name alphabetically.
|
|
*/
|
|
|
|
static int
|
|
compare_classes (const void *a, const void *b)
|
|
{
|
|
const char *aname, *bname;
|
|
|
|
aname = SYMBOL_PRINT_NAME (*(struct symbol **) a);
|
|
bname = SYMBOL_PRINT_NAME (*(struct symbol **) b);
|
|
if (aname == NULL || bname == NULL)
|
|
error (_("internal: compare_classes(1)"));
|
|
|
|
return specialcmp (aname+1, bname+1);
|
|
}
|
|
|
|
/*
|
|
* Function: classes_info(regexp, from_tty)
|
|
*
|
|
* Implements the "info classes" command for objective c classes.
|
|
* Lists all objective c classes that match the optional regexp.
|
|
* Works by grepping thru the list of objective c methods. List will
|
|
* be sorted and uniqued (since one class may have many methods).
|
|
* BUGS: will not list a class that has no methods.
|
|
*/
|
|
|
|
static void
|
|
classes_info (char *regexp, int from_tty)
|
|
{
|
|
struct objfile *objfile;
|
|
struct minimal_symbol *msymbol;
|
|
const char *name;
|
|
char *val;
|
|
int matches = 0;
|
|
int maxlen = 0;
|
|
int ix;
|
|
char myregexp[2048];
|
|
char aclass[256];
|
|
struct symbol **sym_arr;
|
|
|
|
if (regexp == NULL)
|
|
strcpy(myregexp, ".* "); /* Null input: match all objc classes. */
|
|
else
|
|
{
|
|
/* Allow a few extra bytes because of the strcat below. */
|
|
if (sizeof (myregexp) < strlen (regexp) + 4)
|
|
error (_("Regexp is too long: %s"), regexp);
|
|
strcpy(myregexp, regexp);
|
|
if (myregexp[strlen(myregexp) - 1] == '$')
|
|
/* In the method name, the end of the class name is marked by ' '. */
|
|
myregexp[strlen(myregexp) - 1] = ' ';
|
|
else
|
|
strcat(myregexp, ".* ");
|
|
}
|
|
|
|
if (regexp != NULL)
|
|
{
|
|
val = re_comp (myregexp);
|
|
if (val != 0)
|
|
error (_("Invalid regexp (%s): %s"), val, regexp);
|
|
}
|
|
|
|
/* First time thru is JUST to get max length and count. */
|
|
ALL_MSYMBOLS (objfile, msymbol)
|
|
{
|
|
QUIT;
|
|
name = MSYMBOL_NATURAL_NAME (msymbol);
|
|
if (name &&
|
|
(name[0] == '-' || name[0] == '+') &&
|
|
name[1] == '[') /* Got a method name. */
|
|
if (regexp == NULL || re_exec(name+2) != 0)
|
|
{
|
|
/* Compute length of classname part. */
|
|
const char *mystart = name + 2;
|
|
const char *myend = strchr (mystart, ' ');
|
|
|
|
if (myend && (myend - mystart > maxlen))
|
|
maxlen = myend - mystart;
|
|
matches++;
|
|
}
|
|
}
|
|
if (matches)
|
|
{
|
|
printf_filtered (_("Classes matching \"%s\":\n\n"),
|
|
regexp ? regexp : "*");
|
|
sym_arr = alloca (matches * sizeof (struct symbol *));
|
|
matches = 0;
|
|
ALL_MSYMBOLS (objfile, msymbol)
|
|
{
|
|
QUIT;
|
|
name = MSYMBOL_NATURAL_NAME (msymbol);
|
|
if (name &&
|
|
(name[0] == '-' || name[0] == '+') &&
|
|
name[1] == '[') /* Got a method name. */
|
|
if (regexp == NULL || re_exec(name+2) != 0)
|
|
sym_arr[matches++] = (struct symbol *) msymbol;
|
|
}
|
|
|
|
qsort (sym_arr, matches, sizeof (struct minimal_symbol *),
|
|
compare_classes);
|
|
/* Prevent compare on first iteration. */
|
|
aclass[0] = 0;
|
|
for (ix = 0; ix < matches; ix++) /* Now do the output. */
|
|
{
|
|
char *p = aclass;
|
|
|
|
QUIT;
|
|
name = SYMBOL_NATURAL_NAME (sym_arr[ix]);
|
|
name += 2;
|
|
if (p[0] && specialcmp(name, p) == 0)
|
|
continue; /* Seen this one already (not unique). */
|
|
|
|
/* Copy class part of method name. */
|
|
while (*name && *name != ' ')
|
|
*p++ = *name++;
|
|
*p++ = '\0';
|
|
/* Print in columns. */
|
|
puts_filtered_tabular(aclass, maxlen + 1, 0);
|
|
}
|
|
begin_line();
|
|
}
|
|
else
|
|
printf_filtered (_("No classes matching \"%s\"\n"), regexp ? regexp : "*");
|
|
}
|
|
|
|
static char *
|
|
parse_selector (char *method, char **selector)
|
|
{
|
|
char *s1 = NULL;
|
|
char *s2 = NULL;
|
|
int found_quote = 0;
|
|
|
|
char *nselector = NULL;
|
|
|
|
gdb_assert (selector != NULL);
|
|
|
|
s1 = method;
|
|
|
|
s1 = skip_spaces (s1);
|
|
if (*s1 == '\'')
|
|
{
|
|
found_quote = 1;
|
|
s1++;
|
|
}
|
|
s1 = skip_spaces (s1);
|
|
|
|
nselector = s1;
|
|
s2 = s1;
|
|
|
|
for (;;)
|
|
{
|
|
if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':'))
|
|
*s1++ = *s2;
|
|
else if (isspace (*s2))
|
|
;
|
|
else if ((*s2 == '\0') || (*s2 == '\''))
|
|
break;
|
|
else
|
|
return NULL;
|
|
s2++;
|
|
}
|
|
*s1++ = '\0';
|
|
|
|
s2 = skip_spaces (s2);
|
|
if (found_quote)
|
|
{
|
|
if (*s2 == '\'')
|
|
s2++;
|
|
s2 = skip_spaces (s2);
|
|
}
|
|
|
|
if (selector != NULL)
|
|
*selector = nselector;
|
|
|
|
return s2;
|
|
}
|
|
|
|
static char *
|
|
parse_method (char *method, char *type, char **class,
|
|
char **category, char **selector)
|
|
{
|
|
char *s1 = NULL;
|
|
char *s2 = NULL;
|
|
int found_quote = 0;
|
|
|
|
char ntype = '\0';
|
|
char *nclass = NULL;
|
|
char *ncategory = NULL;
|
|
char *nselector = NULL;
|
|
|
|
gdb_assert (type != NULL);
|
|
gdb_assert (class != NULL);
|
|
gdb_assert (category != NULL);
|
|
gdb_assert (selector != NULL);
|
|
|
|
s1 = method;
|
|
|
|
s1 = skip_spaces (s1);
|
|
if (*s1 == '\'')
|
|
{
|
|
found_quote = 1;
|
|
s1++;
|
|
}
|
|
s1 = skip_spaces (s1);
|
|
|
|
if ((s1[0] == '+') || (s1[0] == '-'))
|
|
ntype = *s1++;
|
|
|
|
s1 = skip_spaces (s1);
|
|
|
|
if (*s1 != '[')
|
|
return NULL;
|
|
s1++;
|
|
|
|
nclass = s1;
|
|
while (isalnum (*s1) || (*s1 == '_'))
|
|
s1++;
|
|
|
|
s2 = s1;
|
|
s2 = skip_spaces (s2);
|
|
|
|
if (*s2 == '(')
|
|
{
|
|
s2++;
|
|
s2 = skip_spaces (s2);
|
|
ncategory = s2;
|
|
while (isalnum (*s2) || (*s2 == '_'))
|
|
s2++;
|
|
*s2++ = '\0';
|
|
}
|
|
|
|
/* Truncate the class name now that we're not using the open paren. */
|
|
*s1++ = '\0';
|
|
|
|
nselector = s2;
|
|
s1 = s2;
|
|
|
|
for (;;)
|
|
{
|
|
if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':'))
|
|
*s1++ = *s2;
|
|
else if (isspace (*s2))
|
|
;
|
|
else if (*s2 == ']')
|
|
break;
|
|
else
|
|
return NULL;
|
|
s2++;
|
|
}
|
|
*s1++ = '\0';
|
|
s2++;
|
|
|
|
s2 = skip_spaces (s2);
|
|
if (found_quote)
|
|
{
|
|
if (*s2 != '\'')
|
|
return NULL;
|
|
s2++;
|
|
s2 = skip_spaces (s2);
|
|
}
|
|
|
|
if (type != NULL)
|
|
*type = ntype;
|
|
if (class != NULL)
|
|
*class = nclass;
|
|
if (category != NULL)
|
|
*category = ncategory;
|
|
if (selector != NULL)
|
|
*selector = nselector;
|
|
|
|
return s2;
|
|
}
|
|
|
|
static void
|
|
find_methods (char type, const char *class, const char *category,
|
|
const char *selector,
|
|
VEC (const_char_ptr) **symbol_names)
|
|
{
|
|
struct objfile *objfile = NULL;
|
|
|
|
const char *symname = NULL;
|
|
|
|
char ntype = '\0';
|
|
char *nclass = NULL;
|
|
char *ncategory = NULL;
|
|
char *nselector = NULL;
|
|
|
|
static char *tmp = NULL;
|
|
static unsigned int tmplen = 0;
|
|
|
|
gdb_assert (symbol_names != NULL);
|
|
|
|
ALL_OBJFILES (objfile)
|
|
{
|
|
unsigned int *objc_csym;
|
|
struct minimal_symbol *msymbol = NULL;
|
|
|
|
/* The objfile_csym variable counts the number of ObjC methods
|
|
that this objfile defines. We save that count as a private
|
|
objfile data. If we have already determined that this objfile
|
|
provides no ObjC methods, we can skip it entirely. */
|
|
|
|
unsigned int objfile_csym = 0;
|
|
|
|
objc_csym = objfile_data (objfile, objc_objfile_data);
|
|
if (objc_csym != NULL && *objc_csym == 0)
|
|
/* There are no ObjC symbols in this objfile. Skip it entirely. */
|
|
continue;
|
|
|
|
ALL_OBJFILE_MSYMBOLS (objfile, msymbol)
|
|
{
|
|
QUIT;
|
|
|
|
/* Check the symbol name first as this can be done entirely without
|
|
sending any query to the target. */
|
|
symname = MSYMBOL_NATURAL_NAME (msymbol);
|
|
if (symname == NULL)
|
|
continue;
|
|
|
|
if ((symname[0] != '-' && symname[0] != '+') || (symname[1] != '['))
|
|
/* Not a method name. */
|
|
continue;
|
|
|
|
objfile_csym++;
|
|
|
|
/* Now that thinks are a bit sane, clean up the symname. */
|
|
while ((strlen (symname) + 1) >= tmplen)
|
|
{
|
|
tmplen = (tmplen == 0) ? 1024 : tmplen * 2;
|
|
tmp = xrealloc (tmp, tmplen);
|
|
}
|
|
strcpy (tmp, symname);
|
|
|
|
if (parse_method (tmp, &ntype, &nclass,
|
|
&ncategory, &nselector) == NULL)
|
|
continue;
|
|
|
|
if ((type != '\0') && (ntype != type))
|
|
continue;
|
|
|
|
if ((class != NULL)
|
|
&& ((nclass == NULL) || (strcmp (class, nclass) != 0)))
|
|
continue;
|
|
|
|
if ((category != NULL) &&
|
|
((ncategory == NULL) || (strcmp (category, ncategory) != 0)))
|
|
continue;
|
|
|
|
if ((selector != NULL) &&
|
|
((nselector == NULL) || (strcmp (selector, nselector) != 0)))
|
|
continue;
|
|
|
|
VEC_safe_push (const_char_ptr, *symbol_names, symname);
|
|
}
|
|
|
|
if (objc_csym == NULL)
|
|
{
|
|
objc_csym = obstack_alloc (&objfile->objfile_obstack,
|
|
sizeof (*objc_csym));
|
|
*objc_csym = objfile_csym;
|
|
set_objfile_data (objfile, objc_objfile_data, objc_csym);
|
|
}
|
|
else
|
|
/* Count of ObjC methods in this objfile should be constant. */
|
|
gdb_assert (*objc_csym == objfile_csym);
|
|
}
|
|
}
|
|
|
|
/* Uniquify a VEC of strings. */
|
|
|
|
static void
|
|
uniquify_strings (VEC (const_char_ptr) **strings)
|
|
{
|
|
int ix;
|
|
const char *elem, *last = NULL;
|
|
int out;
|
|
|
|
/* If the vector is empty, there's nothing to do. This explicit
|
|
check is needed to avoid invoking qsort with NULL. */
|
|
if (VEC_empty (const_char_ptr, *strings))
|
|
return;
|
|
|
|
qsort (VEC_address (const_char_ptr, *strings),
|
|
VEC_length (const_char_ptr, *strings),
|
|
sizeof (const_char_ptr),
|
|
compare_strings);
|
|
out = 0;
|
|
for (ix = 0; VEC_iterate (const_char_ptr, *strings, ix, elem); ++ix)
|
|
{
|
|
if (last == NULL || strcmp (last, elem) != 0)
|
|
{
|
|
/* Keep ELEM. */
|
|
VEC_replace (const_char_ptr, *strings, out, elem);
|
|
++out;
|
|
}
|
|
last = elem;
|
|
}
|
|
VEC_truncate (const_char_ptr, *strings, out);
|
|
}
|
|
|
|
/*
|
|
* Function: find_imps (const char *selector, struct symbol **sym_arr)
|
|
*
|
|
* Input: a string representing a selector
|
|
* a pointer to an array of symbol pointers
|
|
* possibly a pointer to a symbol found by the caller.
|
|
*
|
|
* Output: number of methods that implement that selector. Side
|
|
* effects: The array of symbol pointers is filled with matching syms.
|
|
*
|
|
* By analogy with function "find_methods" (symtab.c), builds a list
|
|
* of symbols matching the ambiguous input, so that "decode_line_2"
|
|
* (symtab.c) can list them and ask the user to choose one or more.
|
|
* In this case the matches are objective c methods
|
|
* ("implementations") matching an objective c selector.
|
|
*
|
|
* Note that it is possible for a normal (c-style) function to have
|
|
* the same name as an objective c selector. To prevent the selector
|
|
* from eclipsing the function, we allow the caller (decode_line_1) to
|
|
* search for such a function first, and if it finds one, pass it in
|
|
* to us. We will then integrate it into the list. We also search
|
|
* for one here, among the minsyms.
|
|
*
|
|
* NOTE: if NUM_DEBUGGABLE is non-zero, the sym_arr will be divided
|
|
* into two parts: debuggable (struct symbol) syms, and
|
|
* non_debuggable (struct minimal_symbol) syms. The debuggable
|
|
* ones will come first, before NUM_DEBUGGABLE (which will thus
|
|
* be the index of the first non-debuggable one).
|
|
*/
|
|
|
|
const char *
|
|
find_imps (const char *method, VEC (const_char_ptr) **symbol_names)
|
|
{
|
|
char type = '\0';
|
|
char *class = NULL;
|
|
char *category = NULL;
|
|
char *selector = NULL;
|
|
|
|
char *buf = NULL;
|
|
char *tmp = NULL;
|
|
|
|
int selector_case = 0;
|
|
|
|
gdb_assert (symbol_names != NULL);
|
|
|
|
buf = (char *) alloca (strlen (method) + 1);
|
|
strcpy (buf, method);
|
|
tmp = parse_method (buf, &type, &class, &category, &selector);
|
|
|
|
if (tmp == NULL)
|
|
{
|
|
strcpy (buf, method);
|
|
tmp = parse_selector (buf, &selector);
|
|
|
|
if (tmp == NULL)
|
|
return NULL;
|
|
|
|
selector_case = 1;
|
|
}
|
|
|
|
find_methods (type, class, category, selector, symbol_names);
|
|
|
|
/* If we hit the "selector" case, and we found some methods, then
|
|
add the selector itself as a symbol, if it exists. */
|
|
if (selector_case && !VEC_empty (const_char_ptr, *symbol_names))
|
|
{
|
|
struct symbol *sym = lookup_symbol (selector, NULL, VAR_DOMAIN, 0);
|
|
|
|
if (sym != NULL)
|
|
VEC_safe_push (const_char_ptr, *symbol_names,
|
|
SYMBOL_NATURAL_NAME (sym));
|
|
else
|
|
{
|
|
struct bound_minimal_symbol msym
|
|
= lookup_minimal_symbol (selector, 0, 0);
|
|
|
|
if (msym.minsym != NULL)
|
|
VEC_safe_push (const_char_ptr, *symbol_names,
|
|
MSYMBOL_NATURAL_NAME (msym.minsym));
|
|
}
|
|
}
|
|
|
|
uniquify_strings (symbol_names);
|
|
|
|
return method + (tmp - buf);
|
|
}
|
|
|
|
static void
|
|
print_object_command (char *args, int from_tty)
|
|
{
|
|
struct value *object, *function, *description;
|
|
CORE_ADDR string_addr, object_addr;
|
|
int i = 0;
|
|
gdb_byte c = 0;
|
|
|
|
if (!args || !*args)
|
|
error (
|
|
"The 'print-object' command requires an argument (an Objective-C object)");
|
|
|
|
{
|
|
struct expression *expr = parse_expression (args);
|
|
struct cleanup *old_chain =
|
|
make_cleanup (free_current_contents, &expr);
|
|
int pc = 0;
|
|
|
|
object = evaluate_subexp (builtin_type (expr->gdbarch)->builtin_data_ptr,
|
|
expr, &pc, EVAL_NORMAL);
|
|
do_cleanups (old_chain);
|
|
}
|
|
|
|
/* Validate the address for sanity. */
|
|
object_addr = value_as_long (object);
|
|
read_memory (object_addr, &c, 1);
|
|
|
|
function = find_function_in_inferior ("_NSPrintForDebugger", NULL);
|
|
if (function == NULL)
|
|
error (_("Unable to locate _NSPrintForDebugger in child process"));
|
|
|
|
description = call_function_by_hand (function, 1, &object);
|
|
|
|
string_addr = value_as_long (description);
|
|
if (string_addr == 0)
|
|
error (_("object returns null description"));
|
|
|
|
read_memory (string_addr + i++, &c, 1);
|
|
if (c != 0)
|
|
do
|
|
{ /* Read and print characters up to EOS. */
|
|
QUIT;
|
|
printf_filtered ("%c", c);
|
|
read_memory (string_addr + i++, &c, 1);
|
|
} while (c != 0);
|
|
else
|
|
printf_filtered(_("<object returns empty description>"));
|
|
printf_filtered ("\n");
|
|
}
|
|
|
|
/* The data structure 'methcalls' is used to detect method calls (thru
|
|
* ObjC runtime lib functions objc_msgSend, objc_msgSendSuper, etc.),
|
|
* and ultimately find the method being called.
|
|
*/
|
|
|
|
struct objc_methcall {
|
|
char *name;
|
|
/* Return instance method to be called. */
|
|
int (*stop_at) (CORE_ADDR, CORE_ADDR *);
|
|
/* Start of pc range corresponding to method invocation. */
|
|
CORE_ADDR begin;
|
|
/* End of pc range corresponding to method invocation. */
|
|
CORE_ADDR end;
|
|
};
|
|
|
|
static int resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc);
|
|
static int resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc);
|
|
static int resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc);
|
|
static int resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc);
|
|
|
|
static struct objc_methcall methcalls[] = {
|
|
{ "_objc_msgSend", resolve_msgsend, 0, 0},
|
|
{ "_objc_msgSend_stret", resolve_msgsend_stret, 0, 0},
|
|
{ "_objc_msgSendSuper", resolve_msgsend_super, 0, 0},
|
|
{ "_objc_msgSendSuper_stret", resolve_msgsend_super_stret, 0, 0},
|
|
{ "_objc_getClass", NULL, 0, 0},
|
|
{ "_objc_getMetaClass", NULL, 0, 0}
|
|
};
|
|
|
|
#define nmethcalls (sizeof (methcalls) / sizeof (methcalls[0]))
|
|
|
|
/* The following function, "find_objc_msgsend", fills in the data
|
|
* structure "objc_msgs" by finding the addresses of each of the
|
|
* (currently four) functions that it holds (of which objc_msgSend is
|
|
* the first). This must be called each time symbols are loaded, in
|
|
* case the functions have moved for some reason.
|
|
*/
|
|
|
|
static void
|
|
find_objc_msgsend (void)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < nmethcalls; i++)
|
|
{
|
|
struct bound_minimal_symbol func;
|
|
|
|
/* Try both with and without underscore. */
|
|
func = lookup_bound_minimal_symbol (methcalls[i].name);
|
|
if ((func.minsym == NULL) && (methcalls[i].name[0] == '_'))
|
|
{
|
|
func = lookup_bound_minimal_symbol (methcalls[i].name + 1);
|
|
}
|
|
if (func.minsym == NULL)
|
|
{
|
|
methcalls[i].begin = 0;
|
|
methcalls[i].end = 0;
|
|
continue;
|
|
}
|
|
|
|
methcalls[i].begin = BMSYMBOL_VALUE_ADDRESS (func);
|
|
methcalls[i].end = minimal_symbol_upper_bound (func);
|
|
}
|
|
}
|
|
|
|
/* find_objc_msgcall (replaces pc_off_limits)
|
|
*
|
|
* ALL that this function now does is to determine whether the input
|
|
* address ("pc") is the address of one of the Objective-C message
|
|
* dispatch functions (mainly objc_msgSend or objc_msgSendSuper), and
|
|
* if so, it returns the address of the method that will be called.
|
|
*
|
|
* The old function "pc_off_limits" used to do a lot of other things
|
|
* in addition, such as detecting shared library jump stubs and
|
|
* returning the address of the shlib function that would be called.
|
|
* That functionality has been moved into the gdbarch_skip_trampoline_code and
|
|
* IN_SOLIB_TRAMPOLINE macros, which are resolved in the target-
|
|
* dependent modules.
|
|
*/
|
|
|
|
struct objc_submethod_helper_data {
|
|
int (*f) (CORE_ADDR, CORE_ADDR *);
|
|
CORE_ADDR pc;
|
|
CORE_ADDR *new_pc;
|
|
};
|
|
|
|
static int
|
|
find_objc_msgcall_submethod_helper (void * arg)
|
|
{
|
|
struct objc_submethod_helper_data *s =
|
|
(struct objc_submethod_helper_data *) arg;
|
|
|
|
if (s->f (s->pc, s->new_pc) == 0)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
find_objc_msgcall_submethod (int (*f) (CORE_ADDR, CORE_ADDR *),
|
|
CORE_ADDR pc,
|
|
CORE_ADDR *new_pc)
|
|
{
|
|
struct objc_submethod_helper_data s;
|
|
|
|
s.f = f;
|
|
s.pc = pc;
|
|
s.new_pc = new_pc;
|
|
|
|
if (catch_errors (find_objc_msgcall_submethod_helper,
|
|
(void *) &s,
|
|
"Unable to determine target of "
|
|
"Objective-C method call (ignoring):\n",
|
|
RETURN_MASK_ALL) == 0)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
find_objc_msgcall (CORE_ADDR pc, CORE_ADDR *new_pc)
|
|
{
|
|
unsigned int i;
|
|
|
|
find_objc_msgsend ();
|
|
if (new_pc != NULL)
|
|
{
|
|
*new_pc = 0;
|
|
}
|
|
|
|
for (i = 0; i < nmethcalls; i++)
|
|
if ((pc >= methcalls[i].begin) && (pc < methcalls[i].end))
|
|
{
|
|
if (methcalls[i].stop_at != NULL)
|
|
return find_objc_msgcall_submethod (methcalls[i].stop_at,
|
|
pc, new_pc);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* -Wmissing-prototypes */
|
|
extern initialize_file_ftype _initialize_objc_language;
|
|
|
|
void
|
|
_initialize_objc_language (void)
|
|
{
|
|
add_language (&objc_language_defn);
|
|
add_info ("selectors", selectors_info, /* INFO SELECTORS command. */
|
|
_("All Objective-C selectors, or those matching REGEXP."));
|
|
add_info ("classes", classes_info, /* INFO CLASSES command. */
|
|
_("All Objective-C classes, or those matching REGEXP."));
|
|
add_com ("print-object", class_vars, print_object_command,
|
|
_("Ask an Objective-C object to print itself."));
|
|
add_com_alias ("po", "print-object", class_vars, 1);
|
|
}
|
|
|
|
static void
|
|
read_objc_method (struct gdbarch *gdbarch, CORE_ADDR addr,
|
|
struct objc_method *method)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
method->name = read_memory_unsigned_integer (addr + 0, 4, byte_order);
|
|
method->types = read_memory_unsigned_integer (addr + 4, 4, byte_order);
|
|
method->imp = read_memory_unsigned_integer (addr + 8, 4, byte_order);
|
|
}
|
|
|
|
static unsigned long
|
|
read_objc_methlist_nmethods (struct gdbarch *gdbarch, CORE_ADDR addr)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
return read_memory_unsigned_integer (addr + 4, 4, byte_order);
|
|
}
|
|
|
|
static void
|
|
read_objc_methlist_method (struct gdbarch *gdbarch, CORE_ADDR addr,
|
|
unsigned long num, struct objc_method *method)
|
|
{
|
|
gdb_assert (num < read_objc_methlist_nmethods (gdbarch, addr));
|
|
read_objc_method (gdbarch, addr + 8 + (12 * num), method);
|
|
}
|
|
|
|
static void
|
|
read_objc_object (struct gdbarch *gdbarch, CORE_ADDR addr,
|
|
struct objc_object *object)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
object->isa = read_memory_unsigned_integer (addr, 4, byte_order);
|
|
}
|
|
|
|
static void
|
|
read_objc_super (struct gdbarch *gdbarch, CORE_ADDR addr,
|
|
struct objc_super *super)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
super->receiver = read_memory_unsigned_integer (addr, 4, byte_order);
|
|
super->class = read_memory_unsigned_integer (addr + 4, 4, byte_order);
|
|
};
|
|
|
|
static void
|
|
read_objc_class (struct gdbarch *gdbarch, CORE_ADDR addr,
|
|
struct objc_class *class)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
class->isa = read_memory_unsigned_integer (addr, 4, byte_order);
|
|
class->super_class = read_memory_unsigned_integer (addr + 4, 4, byte_order);
|
|
class->name = read_memory_unsigned_integer (addr + 8, 4, byte_order);
|
|
class->version = read_memory_unsigned_integer (addr + 12, 4, byte_order);
|
|
class->info = read_memory_unsigned_integer (addr + 16, 4, byte_order);
|
|
class->instance_size = read_memory_unsigned_integer (addr + 18, 4,
|
|
byte_order);
|
|
class->ivars = read_memory_unsigned_integer (addr + 24, 4, byte_order);
|
|
class->methods = read_memory_unsigned_integer (addr + 28, 4, byte_order);
|
|
class->cache = read_memory_unsigned_integer (addr + 32, 4, byte_order);
|
|
class->protocols = read_memory_unsigned_integer (addr + 36, 4, byte_order);
|
|
}
|
|
|
|
static CORE_ADDR
|
|
find_implementation_from_class (struct gdbarch *gdbarch,
|
|
CORE_ADDR class, CORE_ADDR sel)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
CORE_ADDR subclass = class;
|
|
|
|
while (subclass != 0)
|
|
{
|
|
|
|
struct objc_class class_str;
|
|
unsigned mlistnum = 0;
|
|
|
|
read_objc_class (gdbarch, subclass, &class_str);
|
|
|
|
for (;;)
|
|
{
|
|
CORE_ADDR mlist;
|
|
unsigned long nmethods;
|
|
unsigned long i;
|
|
|
|
mlist = read_memory_unsigned_integer (class_str.methods +
|
|
(4 * mlistnum),
|
|
4, byte_order);
|
|
if (mlist == 0)
|
|
break;
|
|
|
|
nmethods = read_objc_methlist_nmethods (gdbarch, mlist);
|
|
|
|
for (i = 0; i < nmethods; i++)
|
|
{
|
|
struct objc_method meth_str;
|
|
|
|
read_objc_methlist_method (gdbarch, mlist, i, &meth_str);
|
|
|
|
if (meth_str.name == sel)
|
|
/* FIXME: hppa arch was doing a pointer dereference
|
|
here. There needs to be a better way to do that. */
|
|
return meth_str.imp;
|
|
}
|
|
mlistnum++;
|
|
}
|
|
subclass = class_str.super_class;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
find_implementation (struct gdbarch *gdbarch,
|
|
CORE_ADDR object, CORE_ADDR sel)
|
|
{
|
|
struct objc_object ostr;
|
|
|
|
if (object == 0)
|
|
return 0;
|
|
read_objc_object (gdbarch, object, &ostr);
|
|
if (ostr.isa == 0)
|
|
return 0;
|
|
|
|
return find_implementation_from_class (gdbarch, ostr.isa, sel);
|
|
}
|
|
|
|
static int
|
|
resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc)
|
|
{
|
|
struct frame_info *frame = get_current_frame ();
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
|
struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
|
|
|
|
CORE_ADDR object;
|
|
CORE_ADDR sel;
|
|
CORE_ADDR res;
|
|
|
|
object = gdbarch_fetch_pointer_argument (gdbarch, frame, 0, ptr_type);
|
|
sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type);
|
|
|
|
res = find_implementation (gdbarch, object, sel);
|
|
if (new_pc != 0)
|
|
*new_pc = res;
|
|
if (res == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc)
|
|
{
|
|
struct frame_info *frame = get_current_frame ();
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
|
struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
|
|
|
|
CORE_ADDR object;
|
|
CORE_ADDR sel;
|
|
CORE_ADDR res;
|
|
|
|
object = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type);
|
|
sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 2, ptr_type);
|
|
|
|
res = find_implementation (gdbarch, object, sel);
|
|
if (new_pc != 0)
|
|
*new_pc = res;
|
|
if (res == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc)
|
|
{
|
|
struct frame_info *frame = get_current_frame ();
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
|
struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
|
|
|
|
struct objc_super sstr;
|
|
|
|
CORE_ADDR super;
|
|
CORE_ADDR sel;
|
|
CORE_ADDR res;
|
|
|
|
super = gdbarch_fetch_pointer_argument (gdbarch, frame, 0, ptr_type);
|
|
sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type);
|
|
|
|
read_objc_super (gdbarch, super, &sstr);
|
|
if (sstr.class == 0)
|
|
return 0;
|
|
|
|
res = find_implementation_from_class (gdbarch, sstr.class, sel);
|
|
if (new_pc != 0)
|
|
*new_pc = res;
|
|
if (res == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc)
|
|
{
|
|
struct frame_info *frame = get_current_frame ();
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
|
struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
|
|
|
|
struct objc_super sstr;
|
|
|
|
CORE_ADDR super;
|
|
CORE_ADDR sel;
|
|
CORE_ADDR res;
|
|
|
|
super = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type);
|
|
sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 2, ptr_type);
|
|
|
|
read_objc_super (gdbarch, super, &sstr);
|
|
if (sstr.class == 0)
|
|
return 0;
|
|
|
|
res = find_implementation_from_class (gdbarch, sstr.class, sel);
|
|
if (new_pc != 0)
|
|
*new_pc = res;
|
|
if (res == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
extern initialize_file_ftype _initialize_objc_lang;
|
|
|
|
void
|
|
_initialize_objc_lang (void)
|
|
{
|
|
objc_objfile_data = register_objfile_data ();
|
|
}
|