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87 lines
2.7 KiB
87 lines
2.7 KiB
/* Find line information for a given macro.
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Copyright (C) 2014 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "libdwP.h"
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int
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dwarf_macro_getsrcfiles (Dwarf *dbg, Dwarf_Macro *macro,
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Dwarf_Files **files, size_t *nfiles)
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{
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/* macro is declared NN */
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Dwarf_Macro_Op_Table *const table = macro->table;
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if (table->files == NULL)
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{
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Dwarf_Off line_offset = table->line_offset;
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if (line_offset == (Dwarf_Off) -1)
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{
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*files = NULL;
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*nfiles = 0;
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return 0;
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}
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/* If TABLE->comp_dir is NULL that could mean any of the
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following:
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- The macro unit is not bound to a CU. It's an auxiliary
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unit used purely for import from other units. In that case
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there's actually no COMP_DIR value that we could use.
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- The macro unit is bound to a CU, but there's no
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DW_AT_comp_dir attribute at the CU DIE.
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- The macro unit is bound to a CU, but we don't know that,
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likely because its iteration was requested through
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dwarf_getmacros_off interface. This might be legitimate if
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one macro unit imports another CU's macro unit, but that is
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unlikely to happen in practice. Most probably this is not
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legitimate use of the interfaces.
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So when the interfaces are used correctly, COMP_DIR value is
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always right. That means that we can cache the parsed
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.debug_line unit without fear that later on someone requests
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the same unit through dwarf_getsrcfiles, and the file names
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will be broken. */
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if (__libdw_getsrclines (dbg, line_offset, table->comp_dir,
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table->is_64bit ? 8 : 4,
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NULL, &table->files) < 0)
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table->files = (void *) -1;
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}
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if (table->files == (void *) -1)
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return -1;
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*files = table->files;
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*nfiles = table->files->nfiles;
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return 0;
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}
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