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/* Inspect nvidia extended linemap with dwarf_next_lines.
Copyright (C) 2002, 2004, 2018 Red Hat, Inc.
This file is part of elfutils.
This file is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <fcntl.h>
#include <inttypes.h>
#include <libelf.h>
#include ELFUTILS_HEADER(dw)
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int
main (int argc, char *argv[])
{
int result = 0;
int cnt;
for (cnt = 1; cnt < argc; ++cnt)
{
int fd = open (argv[cnt], O_RDONLY);
Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
if (dbg == NULL)
{
printf ("%s not usable: %s\n", argv[cnt], dwarf_errmsg (-1));
close (fd);
continue;
}
Dwarf_Off off;
Dwarf_Off next_off = 0;
Dwarf_CU *cu = NULL;
Dwarf_Lines *lb;
size_t nlb;
int res;
while ((res = dwarf_next_lines (dbg, off = next_off, &next_off, &cu,
NULL, NULL, &lb, &nlb)) == 0)
{
printf ("off = %" PRIu64 "\n", off);
printf (" %zu lines\n", nlb);
for (size_t i = 0; i < nlb; ++i)
{
Dwarf_Line *l = dwarf_onesrcline (lb, i);
if (l == NULL)
{
printf ("%s: cannot get individual line\n", argv[cnt]);
result = 1;
break;
}
Dwarf_Addr addr;
if (dwarf_lineaddr (l, &addr) != 0)
addr = 0;
const char *file = dwarf_linesrc (l, NULL, NULL);
int line;
if (dwarf_lineno (l, &line) != 0)
line = 0;
printf ("%" PRIx64 ": %s:%d:", (uint64_t) addr,
file ?: "???", line);
/* Getting the file path through the Dwarf_Files should
result in the same path. */
Dwarf_Files *files;
size_t idx;
if (dwarf_line_file (l, &files, &idx) != 0)
{
printf ("%s: cannot get file from line (%zd): %s\n",
argv[cnt], i, dwarf_errmsg (-1));
result = 1;
break;
}
const char *path = dwarf_filesrc (files, idx, NULL, NULL);
if ((path == NULL && file != NULL)
|| (path != NULL && file == NULL)
|| (strcmp (file, path) != 0))
{
printf ("%s: line %zd srcline (%s) != file srcline (%s)\n",
argv[cnt], i, file ?: "???", path ?: "???");
result = 1;
break;
}
int column;
if (dwarf_linecol (l, &column) != 0)
column = 0;
if (column >= 0)
printf ("%d:", column);
bool is_stmt;
if (dwarf_linebeginstatement (l, &is_stmt) != 0)
is_stmt = false;
bool end_sequence;
if (dwarf_lineendsequence (l, &end_sequence) != 0)
end_sequence = false;
bool basic_block;
if (dwarf_lineblock (l, &basic_block) != 0)
basic_block = false;
bool prologue_end;
if (dwarf_lineprologueend (l, &prologue_end) != 0)
prologue_end = false;
bool epilogue_begin;
if (dwarf_lineepiloguebegin (l, &epilogue_begin) != 0)
epilogue_begin = false;
printf (" is_stmt:%s, end_seq:%s, bb:%s, prologue:%s, epilogue:%s\n",
is_stmt ? "yes" : "no", end_sequence ? "yes" : "no",
basic_block ? "yes" : "no", prologue_end ? "yes" : "no",
epilogue_begin ? "yes" : "no");
Dwarf_Line* callee_context = l;
Dwarf_Line* caller_context = dwarf_linecontext (lb, l);
unsigned int depth = 0;
while (caller_context != NULL)
{
depth++;
for (unsigned int x = 0; x < depth; x++)
printf (" ");
const char *inlined_file = dwarf_linesrc (caller_context,
NULL, NULL);
int inlined_line;
if (dwarf_lineno (caller_context, &inlined_line) != 0)
inlined_line = 0;
printf ("%s inlined at %s:%d\n",
dwarf_linefunctionname(dbg, callee_context),
inlined_file ?: "???", inlined_line);
callee_context = caller_context;
caller_context = dwarf_linecontext (lb, callee_context);
}
}
}
if (res < 0)
{
printf ("dwarf_next_lines failed: %s\n", dwarf_errmsg (-1));
result = 1;
}
dwarf_end (dbg);
close (fd);
}
return result;
}
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