61012eef84
This commit introduces a new inline common function "startswith" which takes two string arguments and returns nonzero if the first string starts with the second. It also updates the 295 places where this logic was written out longhand to use the new function. gdb/ChangeLog: * common/common-utils.h (startswith): New inline function. All places where this logic was used updated to use the above.
354 lines
9.5 KiB
C
354 lines
9.5 KiB
C
/* Support for printing Java types for GDB, the GNU debugger.
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Copyright (C) 1997-2015 Free Software Foundation, Inc.
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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 "value.h"
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#include "demangle.h"
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#include "gdb-demangle.h"
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#include "jv-lang.h"
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#include "typeprint.h"
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#include "c-lang.h"
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#include "cp-abi.h"
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#include "cp-support.h"
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/* Local functions */
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static void java_type_print_base (struct type * type,
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struct ui_file *stream, int show,
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int level,
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const struct type_print_options *flags);
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static void
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java_type_print_derivation_info (struct ui_file *stream, struct type *type)
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{
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const char *name;
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int i;
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int n_bases;
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int prev;
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n_bases = TYPE_N_BASECLASSES (type);
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for (i = 0, prev = 0; i < n_bases; i++)
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{
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int kind;
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kind = BASETYPE_VIA_VIRTUAL (type, i) ? 'I' : 'E';
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fputs_filtered (kind == prev ? ", "
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: kind == 'I' ? " implements "
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: " extends ",
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stream);
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prev = kind;
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name = type_name_no_tag (TYPE_BASECLASS (type, i));
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fprintf_filtered (stream, "%s", name ? name : "(null)");
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}
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if (i > 0)
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fputs_filtered (" ", stream);
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}
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/* Print the name of the type (or the ultimate pointer target,
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function value or array element), or the description of a
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structure or union.
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SHOW positive means print details about the type (e.g. enum values),
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and print structure elements passing SHOW - 1 for show.
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SHOW negative means just print the type name or struct tag if there is one.
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If there is no name, print something sensible but concise like
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"struct {...}".
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SHOW zero means just print the type name or struct tag if there is one.
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If there is no name, print something sensible but not as concise like
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"struct {int x; int y;}".
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LEVEL is the number of spaces to indent by.
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We increase it for some recursive calls. */
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static void
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java_type_print_base (struct type *type, struct ui_file *stream, int show,
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int level, const struct type_print_options *flags)
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{
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int i;
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int len;
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char *mangled_name;
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char *demangled_name;
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QUIT;
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wrap_here (" ");
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if (type == NULL)
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{
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fputs_filtered ("<type unknown>", stream);
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return;
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}
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/* When SHOW is zero or less, and there is a valid type name, then always
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just print the type name directly from the type. */
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if (show <= 0
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&& TYPE_NAME (type) != NULL)
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{
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fputs_filtered (TYPE_NAME (type), stream);
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return;
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}
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CHECK_TYPEDEF (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_PTR:
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java_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level,
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flags);
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break;
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case TYPE_CODE_STRUCT:
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if (TYPE_TAG_NAME (type) != NULL && TYPE_TAG_NAME (type)[0] == '[')
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{ /* array type */
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char *name = java_demangle_type_signature (TYPE_TAG_NAME (type));
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fputs_filtered (name, stream);
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xfree (name);
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break;
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}
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if (show >= 0)
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fprintf_filtered (stream, "class ");
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if (TYPE_TAG_NAME (type) != NULL)
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{
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fputs_filtered (TYPE_TAG_NAME (type), stream);
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if (show > 0)
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fputs_filtered (" ", stream);
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}
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wrap_here (" ");
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if (show < 0)
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{
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/* If we just printed a tag name, no need to print anything else. */
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if (TYPE_TAG_NAME (type) == NULL)
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fprintf_filtered (stream, "{...}");
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}
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else if (show > 0 || TYPE_TAG_NAME (type) == NULL)
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{
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java_type_print_derivation_info (stream, type);
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fprintf_filtered (stream, "{\n");
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if ((TYPE_NFIELDS (type) == 0) && (TYPE_NFN_FIELDS (type) == 0))
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{
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if (TYPE_STUB (type))
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fprintfi_filtered (level + 4, stream, "<incomplete type>\n");
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else
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fprintfi_filtered (level + 4, stream, "<no data fields>\n");
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}
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/* If there is a base class for this type,
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do not print the field that it occupies. */
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len = TYPE_NFIELDS (type);
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for (i = TYPE_N_BASECLASSES (type); i < len; i++)
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{
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QUIT;
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/* Don't print out virtual function table. */
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if (startswith (TYPE_FIELD_NAME (type, i), "_vptr")
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&& is_cplus_marker ((TYPE_FIELD_NAME (type, i))[5]))
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continue;
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/* Don't print the dummy field "class". */
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if (startswith (TYPE_FIELD_NAME (type, i), "class"))
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continue;
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print_spaces_filtered (level + 4, stream);
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if (HAVE_CPLUS_STRUCT (type))
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{
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if (TYPE_FIELD_PROTECTED (type, i))
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fprintf_filtered (stream, "protected ");
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else if (TYPE_FIELD_PRIVATE (type, i))
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fprintf_filtered (stream, "private ");
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else
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fprintf_filtered (stream, "public ");
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}
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if (field_is_static (&TYPE_FIELD (type, i)))
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fprintf_filtered (stream, "static ");
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java_print_type (TYPE_FIELD_TYPE (type, i),
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TYPE_FIELD_NAME (type, i),
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stream, show - 1, level + 4, flags);
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fprintf_filtered (stream, ";\n");
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}
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/* If there are both fields and methods, put a space between. */
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len = TYPE_NFN_FIELDS (type);
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if (len)
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fprintf_filtered (stream, "\n");
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/* Print out the methods. */
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for (i = 0; i < len; i++)
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{
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struct fn_field *f;
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int j;
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const char *method_name;
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const char *name;
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int is_constructor;
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int n_overloads;
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f = TYPE_FN_FIELDLIST1 (type, i);
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n_overloads = TYPE_FN_FIELDLIST_LENGTH (type, i);
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method_name = TYPE_FN_FIELDLIST_NAME (type, i);
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name = type_name_no_tag (type);
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is_constructor = name && strcmp (method_name, name) == 0;
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for (j = 0; j < n_overloads; j++)
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{
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const char *real_physname;
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char *physname, *p;
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int is_full_physname_constructor;
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real_physname = TYPE_FN_FIELD_PHYSNAME (f, j);
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/* The physname will contain the return type
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after the final closing parenthesis. Strip it off. */
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p = strrchr (real_physname, ')');
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gdb_assert (p != NULL);
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++p; /* Keep the trailing ')'. */
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physname = alloca (p - real_physname + 1);
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memcpy (physname, real_physname, p - real_physname);
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physname[p - real_physname] = '\0';
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is_full_physname_constructor
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= (TYPE_FN_FIELD_CONSTRUCTOR (f, j)
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|| is_constructor_name (physname)
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|| is_destructor_name (physname));
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QUIT;
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print_spaces_filtered (level + 4, stream);
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if (TYPE_FN_FIELD_PROTECTED (f, j))
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fprintf_filtered (stream, "protected ");
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else if (TYPE_FN_FIELD_PRIVATE (f, j))
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fprintf_filtered (stream, "private ");
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else if (TYPE_FN_FIELD_PUBLIC (f, j))
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fprintf_filtered (stream, "public ");
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if (TYPE_FN_FIELD_ABSTRACT (f, j))
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fprintf_filtered (stream, "abstract ");
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if (TYPE_FN_FIELD_STATIC (f, j))
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fprintf_filtered (stream, "static ");
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if (TYPE_FN_FIELD_FINAL (f, j))
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fprintf_filtered (stream, "final ");
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if (TYPE_FN_FIELD_SYNCHRONIZED (f, j))
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fprintf_filtered (stream, "synchronized ");
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if (TYPE_FN_FIELD_NATIVE (f, j))
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fprintf_filtered (stream, "native ");
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if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)) == 0)
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{
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/* Keep GDB from crashing here. */
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fprintf_filtered (stream, "<undefined type> %s;\n",
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TYPE_FN_FIELD_PHYSNAME (f, j));
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break;
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}
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else if (!is_constructor && !is_full_physname_constructor)
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{
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type_print (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)),
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"", stream, -1);
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fputs_filtered (" ", stream);
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}
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if (TYPE_FN_FIELD_STUB (f, j))
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/* Build something we can demangle. */
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mangled_name = gdb_mangle_name (type, i, j);
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else
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mangled_name = physname;
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demangled_name =
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gdb_demangle (mangled_name,
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DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
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if (demangled_name == NULL)
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demangled_name = xstrdup (mangled_name);
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{
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char *demangled_no_class;
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char *ptr;
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ptr = demangled_no_class = demangled_name;
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while (1)
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{
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char c;
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c = *ptr++;
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if (c == 0 || c == '(')
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break;
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if (c == '.')
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demangled_no_class = ptr;
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}
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fputs_filtered (demangled_no_class, stream);
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xfree (demangled_name);
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}
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if (TYPE_FN_FIELD_STUB (f, j))
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xfree (mangled_name);
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fprintf_filtered (stream, ";\n");
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}
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}
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fprintfi_filtered (level, stream, "}");
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}
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break;
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default:
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c_type_print_base (type, stream, show, level, flags);
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}
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}
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/* LEVEL is the depth to indent lines by. */
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void
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java_print_type (struct type *type, const char *varstring,
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struct ui_file *stream, int show, int level,
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const struct type_print_options *flags)
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{
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int demangled_args;
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java_type_print_base (type, stream, show, level, flags);
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if (varstring != NULL && *varstring != '\0')
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{
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fputs_filtered (" ", stream);
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fputs_filtered (varstring, stream);
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}
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/* For demangled function names, we have the arglist as part of the name,
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so don't print an additional pair of ()'s. */
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demangled_args = varstring != NULL && strchr (varstring, '(') != NULL;
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c_type_print_varspec_suffix (type, stream, show, 0, demangled_args, flags);
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}
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