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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <inttypes.h>
#ifdef HAVE_BACKTRACE_SUPPORT
#include <execinfo.h>
#include <elfutils/libdwfl.h>
#endif
#include "src/log.h"
#include "src/backtrace.h"
void btd_backtrace_init(void)
{
#ifdef HAVE_BACKTRACE_SUPPORT
void *frames[1];
/*
* initialize the backtracer, since the ctor calls dlopen(), which
* calls malloc(), which isn't signal-safe.
*/
backtrace(frames, 1);
#endif
}
void btd_backtrace(uint16_t index)
{
#ifdef HAVE_BACKTRACE_SUPPORT
char *debuginfo_path = NULL;
const Dwfl_Callbacks callbacks = {
.find_debuginfo = dwfl_standard_find_debuginfo,
.find_elf = dwfl_linux_proc_find_elf,
.debuginfo_path = &debuginfo_path,
};
Dwfl *dwfl;
void *frames[48];
int n, n_ptrs;
dwfl = dwfl_begin(&callbacks);
if (dwfl_linux_proc_report(dwfl, getpid()))
goto done;
dwfl_report_end(dwfl, NULL, NULL);
n_ptrs = backtrace(frames, 48);
if (n_ptrs < 1)
goto done;
btd_error(index, "++++++++ backtrace ++++++++");
for (n = 1; n < n_ptrs; n++) {
GElf_Addr addr = (uintptr_t) frames[n];
GElf_Sym sym;
GElf_Word shndx;
Dwfl_Module *module = dwfl_addrmodule(dwfl, addr);
Dwfl_Line *line;
const char *name, *modname;
if (!module) {
btd_error(index, "#%-2u ?? [%#" PRIx64 "]", n, addr);
continue;
}
name = dwfl_module_addrsym(module, addr, &sym, &shndx);
if (!name) {
modname = dwfl_module_info(module, NULL, NULL, NULL,
NULL, NULL, NULL, NULL);
btd_error(index, "#%-2u ?? (%s) [%#" PRIx64 "]",
n, modname, addr);
continue;
}
line = dwfl_module_getsrc(module, addr);
if (line) {
int lineno;
const char *src = dwfl_lineinfo(line, NULL, &lineno,
NULL, NULL, NULL);
if (src) {
btd_error(index, "#%-2u %s+%#" PRIx64 " "
"(%s:%d) [%#" PRIx64 "]",
n, name, addr - sym.st_value,
src, lineno, addr);
continue;
}
}
modname = dwfl_module_info(module, NULL, NULL, NULL,
NULL, NULL, NULL, NULL);
btd_error(index, "#%-2u %s+%#" PRIx64 " (%s) [%#" PRIx64 "]",
n, name, addr - sym.st_value,
modname, addr);
}
btd_error(index, "+++++++++++++++++++++++++++");
done:
dwfl_end(dwfl);
#endif
}
void btd_assertion_message_expr(const char *file, int line,
const char *func, const char *expr)
{
btd_error(0xffff, "Assertion failed: (%s) %s:%d in %s",
expr, file, line, func);
btd_backtrace(0xffff);
}
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