622 lines
15 KiB
C
622 lines
15 KiB
C
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/* Helper routines for D support in GDB.
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Copyright (C) 2014 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 "d-lang.h"
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#include "gdb_obstack.h"
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#include "safe-ctype.h"
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static const char *parse_function_args (struct obstack *, const char *);
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static const char *parse_type (struct obstack *, const char *);
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/* Demangle the calling convention from MANGLE and append it to TEMPBUF.
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Return the remaining string on success or NULL on failure. */
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static const char *
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parse_call_convention (struct obstack *tempbuf, const char *mangle)
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{
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if ((mangle == NULL) || (*mangle == '\0'))
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return mangle;
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switch (*mangle)
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{
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case 'F': /* (D) */
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mangle++;
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break;
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case 'U': /* (C) */
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mangle++;
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obstack_grow_str (tempbuf, "extern(C) ");
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break;
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case 'W': /* (Windows) */
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mangle++;
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obstack_grow_str (tempbuf, "extern(Windows) ");
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break;
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case 'V': /* (Pascal) */
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mangle++;
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obstack_grow_str (tempbuf, "extern(Pascal) ");
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break;
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case 'R': /* (C++) */
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mangle++;
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obstack_grow_str (tempbuf, "extern(C++) ");
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break;
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default:
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return NULL;
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}
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return mangle;
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}
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/* Demangle the D function attributes from MANGLE and append it to TEMPBUF.
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Return the remaining string on success or NULL on failure. */
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static const char *
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parse_attributes (struct obstack *tempbuf, const char *mangle)
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{
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if ((mangle == NULL) || (*mangle == '\0'))
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return mangle;
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while (*mangle == 'N')
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{
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mangle++;
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switch (*mangle)
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{
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case 'a': /* pure */
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mangle++;
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obstack_grow_str (tempbuf, "pure ");
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continue;
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case 'b': /* nothrow */
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mangle++;
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obstack_grow_str (tempbuf, "nothrow ");
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continue;
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case 'c': /* ref */
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mangle++;
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obstack_grow_str (tempbuf, "ref ");
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continue;
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case 'd': /* @property */
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mangle++;
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obstack_grow_str (tempbuf, "@property ");
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continue;
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case 'e': /* @trusted */
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mangle++;
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obstack_grow_str (tempbuf, "@trusted ");
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continue;
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case 'f': /* @safe */
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mangle++;
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obstack_grow_str (tempbuf, "@safe ");
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continue;
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case 'g':
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case 'h':
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/* inout parameter is represented as 'Ng'.
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vector parameter is represented as 'Nh'.
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If we see this, then we know we're really in the
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parameter list. Rewind and break. */
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mangle--;
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}
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break;
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}
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return mangle;
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}
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/* Demangle the function type from MANGLE and append it to TEMPBUF.
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Return the remaining string on success or NULL on failure. */
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static const char *
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parse_function_type (struct obstack *tempbuf, const char *mangle)
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{
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struct obstack obattr, obargs, obtype;
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char *attr, *args, *type;
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size_t szattr, szargs, sztype;
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if ((mangle == NULL) || (*mangle == '\0'))
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return mangle;
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/* The order of the mangled string is:
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TypeFunction ::
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CallConvention FuncAttrs Arguments ArgClose Type
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The demangled string is re-ordered as:
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CallConvention Type Arguments FuncAttrs
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*/
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obstack_init (&obattr);
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obstack_init (&obargs);
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obstack_init (&obtype);
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/* Function call convention. */
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mangle = parse_call_convention (tempbuf, mangle);
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/* Function attributes. */
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mangle = parse_attributes (&obattr, mangle);
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szattr = obstack_object_size (&obattr);
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attr = obstack_finish (&obattr);
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/* Function arguments. */
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mangle = parse_function_args (&obargs, mangle);
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szargs = obstack_object_size (&obargs);
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args = obstack_finish (&obargs);
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/* Function return type. */
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mangle = parse_type (&obtype, mangle);
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sztype = obstack_object_size (&obtype);
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type = obstack_finish (&obtype);
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/* Append to buffer in order. */
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obstack_grow (tempbuf, type, sztype);
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obstack_grow_str (tempbuf, "(");
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obstack_grow (tempbuf, args, szargs);
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obstack_grow_str (tempbuf, ") ");
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obstack_grow (tempbuf, attr, szattr);
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obstack_free (&obattr, NULL);
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obstack_free (&obargs, NULL);
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obstack_free (&obtype, NULL);
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return mangle;
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}
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/* Demangle the argument list from MANGLE and append it to TEMPBUF.
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Return the remaining string on success or NULL on failure. */
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static const char *
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parse_function_args (struct obstack *tempbuf, const char *mangle)
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{
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size_t n = 0;
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while ((mangle != NULL) && (*mangle != '\0'))
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{
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switch (*mangle)
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{
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case 'X': /* (variadic T t...) style. */
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mangle++;
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obstack_grow_str (tempbuf, "...");
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return mangle;
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case 'Y': /* (variadic T t, ...) style. */
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mangle++;
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obstack_grow_str (tempbuf, ", ...");
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return mangle;
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case 'Z': /* Normal function. */
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mangle++;
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return mangle;
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}
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if (n++)
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obstack_grow_str (tempbuf, ", ");
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if (*mangle == 'M') /* scope(T) */
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{
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mangle++;
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obstack_grow_str (tempbuf, "scope ");
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}
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switch (*mangle)
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{
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case 'J': /* out(T) */
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mangle++;
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obstack_grow_str (tempbuf, "out ");
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break;
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case 'K': /* ref(T) */
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mangle++;
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obstack_grow_str (tempbuf, "ref ");
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break;
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case 'L': /* lazy(T) */
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mangle++;
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obstack_grow_str (tempbuf, "lazy ");
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break;
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}
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mangle = parse_type (tempbuf, mangle);
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}
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return mangle;
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}
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/* Demangle the type from MANGLE and append it to TEMPBUF.
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Return the remaining string on success or NULL on failure. */
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static const char *
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parse_type (struct obstack *tempbuf, const char *mangle)
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{
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if ((mangle == NULL) || (*mangle == '\0'))
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return mangle;
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switch (*mangle)
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{
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case 'O': /* shared(T) */
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mangle++;
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obstack_grow_str (tempbuf, "shared(");
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, ")");
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return mangle;
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case 'x': /* const(T) */
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mangle++;
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obstack_grow_str (tempbuf, "const(");
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, ")");
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return mangle;
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case 'y': /* immutable(T) */
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mangle++;
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obstack_grow_str (tempbuf, "immutable(");
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, ")");
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return mangle;
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case 'N':
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mangle++;
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if (*mangle == 'g') /* wild(T) */
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{
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mangle++;
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obstack_grow_str (tempbuf, "inout(");
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, ")");
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return mangle;
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}
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else if (*mangle == 'h') /* vector(T) */
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{
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mangle++;
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/* The basetype for vectors are always static arrays. */
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if (*mangle != 'G')
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return NULL;
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obstack_grow_str (tempbuf, "__vector(");
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, ")");
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return mangle;
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}
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else
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return NULL;
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case 'A': /* dynamic array (T[]) */
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mangle++;
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, "[]");
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return mangle;
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case 'G': /* static array (T[N]) */
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{
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const char *numptr;
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size_t num = 0;
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mangle++;
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numptr = mangle;
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while (ISDIGIT (*mangle))
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{
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num++;
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mangle++;
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}
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, "[");
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obstack_grow (tempbuf, numptr, num);
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obstack_grow_str (tempbuf, "]");
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return mangle;
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}
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case 'H': /* associative array (T[T]) */
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{
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struct obstack obtype;
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char *type;
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size_t sztype;
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mangle++;
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obstack_init (&obtype);
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mangle = parse_type (&obtype, mangle);
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sztype = obstack_object_size (&obtype);
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type = obstack_finish (&obtype);
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, "[");
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obstack_grow (tempbuf, type, sztype);
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obstack_grow_str (tempbuf, "]");
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obstack_free (&obtype, NULL);
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return mangle;
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}
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case 'P': /* pointer (T*) */
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mangle++;
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mangle = parse_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, "*");
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return mangle;
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case 'I': /* ident T */
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case 'C': /* class T */
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case 'S': /* struct T */
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case 'E': /* enum T */
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case 'T': /* typedef T */
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mangle++;
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return d_parse_symbol (tempbuf, mangle);
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case 'D': /* delegate T */
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mangle++;
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mangle = parse_function_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, "delegate");
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return mangle;
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case 'B': /* tuple T */
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/* TODO: Handle this. */
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return NULL;
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/* Function types */
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case 'F': case 'U': case 'W':
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case 'V': case 'R':
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mangle = parse_function_type (tempbuf, mangle);
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obstack_grow_str (tempbuf, "function");
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return mangle;
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/* Basic types */
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case 'n':
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mangle++;
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obstack_grow_str (tempbuf, "none");
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return mangle;
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case 'v':
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mangle++;
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obstack_grow_str (tempbuf, "void");
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return mangle;
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case 'g':
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mangle++;
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obstack_grow_str (tempbuf, "byte");
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return mangle;
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case 'h':
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mangle++;
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obstack_grow_str (tempbuf, "ubyte");
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return mangle;
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case 's':
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mangle++;
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obstack_grow_str (tempbuf, "short");
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return mangle;
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case 't':
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mangle++;
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obstack_grow_str (tempbuf, "ushort");
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return mangle;
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case 'i':
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mangle++;
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obstack_grow_str (tempbuf, "int");
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return mangle;
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case 'k':
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mangle++;
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obstack_grow_str (tempbuf, "uint");
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return mangle;
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case 'l':
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mangle++;
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obstack_grow_str (tempbuf, "long");
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return mangle;
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case 'm':
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mangle++;
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obstack_grow_str (tempbuf, "ulong");
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return mangle;
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case 'f':
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mangle++;
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obstack_grow_str (tempbuf, "float");
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return mangle;
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case 'd':
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|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "double");
|
||
|
|
return mangle;
|
||
|
|
case 'e':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "real");
|
||
|
|
return mangle;
|
||
|
|
|
||
|
|
/* Imaginary and Complex types */
|
||
|
|
case 'o':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "ifloat");
|
||
|
|
return mangle;
|
||
|
|
case 'p':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "idouble");
|
||
|
|
return mangle;
|
||
|
|
case 'j':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "ireal");
|
||
|
|
return mangle;
|
||
|
|
case 'q':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "cfloat");
|
||
|
|
return mangle;
|
||
|
|
case 'r':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "cdouble");
|
||
|
|
return mangle;
|
||
|
|
case 'c':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "creal");
|
||
|
|
return mangle;
|
||
|
|
|
||
|
|
/* Other types */
|
||
|
|
case 'b':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "bool");
|
||
|
|
return mangle;
|
||
|
|
case 'a':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "char");
|
||
|
|
return mangle;
|
||
|
|
case 'u':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "wchar");
|
||
|
|
return mangle;
|
||
|
|
case 'w':
|
||
|
|
mangle++;
|
||
|
|
obstack_grow_str (tempbuf, "dchar");
|
||
|
|
return mangle;
|
||
|
|
|
||
|
|
default: /* unhandled */
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Extract the identifier from MANGLE and append it to TEMPBUF.
|
||
|
|
Return the remaining string on success or NULL on failure. */
|
||
|
|
|
||
|
|
static const char *
|
||
|
|
parse_identifier (struct obstack *tempbuf, const char *mangle)
|
||
|
|
{
|
||
|
|
if ((mangle == NULL) || (*mangle == '\0'))
|
||
|
|
return mangle;
|
||
|
|
|
||
|
|
if (ISDIGIT (*mangle))
|
||
|
|
{
|
||
|
|
char *endptr;
|
||
|
|
long i = strtol (mangle, &endptr, 10);
|
||
|
|
|
||
|
|
if (i <= 0 || strlen (endptr) < i)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
mangle = endptr;
|
||
|
|
|
||
|
|
/* No support for demangling templates. */
|
||
|
|
if (i >= 5 && strncmp (mangle, "__T", 3) == 0)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (strncmp (mangle, "__ctor", i) == 0)
|
||
|
|
{
|
||
|
|
/* Constructor symbol for a class/struct. */
|
||
|
|
obstack_grow_str (tempbuf, "this");
|
||
|
|
mangle += i;
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
else if (strncmp (mangle, "__dtor", i) == 0)
|
||
|
|
{
|
||
|
|
/* Destructor symbol for a class/struct. */
|
||
|
|
obstack_grow_str (tempbuf, "~this");
|
||
|
|
mangle += i;
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
else if (strncmp (mangle, "__postblit", i) == 0)
|
||
|
|
{
|
||
|
|
/* Postblit symbol for a struct. */
|
||
|
|
obstack_grow_str (tempbuf, "this(this)");
|
||
|
|
mangle += i;
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
else if (strncmp (mangle, "__initZ", i+1) == 0)
|
||
|
|
{
|
||
|
|
/* The static initialiser for a given symbol. */
|
||
|
|
obstack_grow_str (tempbuf, "init$");
|
||
|
|
mangle += i + 1;
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
else if (strncmp (mangle, "__ClassZ", i+1) == 0)
|
||
|
|
{
|
||
|
|
/* The classinfo symbol for a given class. */
|
||
|
|
obstack_grow_str (tempbuf, "classinfo$");
|
||
|
|
mangle += i + 1;
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
else if (strncmp (mangle, "__vtblZ", i+1) == 0)
|
||
|
|
{
|
||
|
|
/* The vtable symbol for a given class. */
|
||
|
|
obstack_grow_str (tempbuf, "vtbl$");
|
||
|
|
mangle += i + 1;
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
else if (strncmp (mangle, "__InterfaceZ", i+1) == 0)
|
||
|
|
{
|
||
|
|
/* The interface symbol for a given class. */
|
||
|
|
obstack_grow_str (tempbuf, "interface$");
|
||
|
|
mangle += i + 1;
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
else if (strncmp (mangle, "__ModuleInfoZ", i+1) == 0)
|
||
|
|
{
|
||
|
|
/* The ModuleInfo symbol for a given module. */
|
||
|
|
obstack_grow_str (tempbuf, "moduleinfo$");
|
||
|
|
mangle += i + 1;
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
obstack_grow (tempbuf, mangle, i);
|
||
|
|
mangle += i;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Test whether the current position of MANGLE is pointing to the
|
||
|
|
beginning of a mangled function parameter list, which starts with
|
||
|
|
the calling convention. Returns 1 on success or 0 on failure. */
|
||
|
|
|
||
|
|
static int
|
||
|
|
call_convention_p (const char *mangle)
|
||
|
|
{
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
if ((mangle == NULL) || (*mangle == '\0'))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
switch (*mangle)
|
||
|
|
{
|
||
|
|
case 'F': case 'U': case 'V':
|
||
|
|
case 'W': case 'R':
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
case 'M': /* Prefix for functions needing 'this'. */
|
||
|
|
i = 1;
|
||
|
|
if (mangle[i] == 'x')
|
||
|
|
i++;
|
||
|
|
|
||
|
|
switch (mangle[i])
|
||
|
|
{
|
||
|
|
case 'F': case 'U': case 'V':
|
||
|
|
case 'W': case 'R':
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Extract and demangle the symbol in MANGLE and append it to TEMPBUF.
|
||
|
|
Return the remaining signature on success or NULL on failure. */
|
||
|
|
|
||
|
|
const char *
|
||
|
|
d_parse_symbol (struct obstack *tempbuf, const char *mangle)
|
||
|
|
{
|
||
|
|
size_t n = 0;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
if (n++)
|
||
|
|
obstack_grow_str (tempbuf, ".");
|
||
|
|
|
||
|
|
mangle = parse_identifier (tempbuf, mangle);
|
||
|
|
|
||
|
|
if (call_convention_p (mangle))
|
||
|
|
{
|
||
|
|
char *saved;
|
||
|
|
|
||
|
|
/* Skip over 'this' parameter. */
|
||
|
|
if (*mangle == 'M')
|
||
|
|
mangle += (mangle[1] == 'x') ? 2 : 1;
|
||
|
|
|
||
|
|
/* Skip over calling convention and attributes in qualified name. */
|
||
|
|
saved = obstack_next_free (tempbuf);
|
||
|
|
mangle = parse_call_convention (tempbuf, mangle);
|
||
|
|
mangle = parse_attributes (tempbuf, mangle);
|
||
|
|
obstack_next_free (tempbuf) = saved;
|
||
|
|
|
||
|
|
obstack_grow_str (tempbuf, "(");
|
||
|
|
mangle = parse_function_args (tempbuf, mangle);
|
||
|
|
obstack_grow_str (tempbuf, ")");
|
||
|
|
|
||
|
|
/* Demangle the function return type as a kind of sanity test. */
|
||
|
|
if ((mangle != NULL) && !ISDIGIT (*mangle))
|
||
|
|
{
|
||
|
|
saved = obstack_next_free (tempbuf);
|
||
|
|
mangle = parse_type (tempbuf, mangle);
|
||
|
|
obstack_next_free (tempbuf) = saved;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while ((mangle != NULL) && ISDIGIT (*mangle));
|
||
|
|
|
||
|
|
return mangle;
|
||
|
|
}
|
||
|
|
|