struct sr_core_stacktrace *
sr_parse_coredump_maps(const char *core_file,
const char *exe_file,
const char *maps_file,
char **error_msg)
{
struct sr_core_stacktrace *stacktrace = NULL;
/* Initialize error_msg to 'no error'. */
if (error_msg)
*error_msg = NULL;
struct core_handle *ch = open_coredump(core_file, exe_file, maps_file, error_msg);
if (!ch)
goto fail;
if (dwfl_core_file_attach(ch->dwfl, ch->eh) < 0)
{
set_error_dwfl("dwfl_core_file_attach");
goto fail;
}
stacktrace = sr_core_stacktrace_new();
if (!stacktrace)
{
set_error("Failed to initialize stacktrace memory");
goto fail;
}
struct thread_callback_arg thread_arg =
{
.stacktrace = stacktrace,
.error_msg = NULL
};
int ret = dwfl_getthreads(ch->dwfl, unwind_thread, &thread_arg);
if (ret != 0)
{
if (ret == -1)
set_error_dwfl("dwfl_getthreads");
else if (ret == DWARF_CB_ABORT)
{
set_error("%s", thread_arg.error_msg);
free(thread_arg.error_msg);
}
else
set_error("Unknown error in dwfl_getthreads");
sr_core_stacktrace_free(stacktrace);
stacktrace = NULL;
goto fail;
}
stacktrace->executable = sr_strdup(exe_file);
stacktrace->signal = get_signal_number(ch->eh, core_file);
/* FIXME: is this the best we can do? */
stacktrace->crash_thread = stacktrace->threads;
fail:
core_handle_free(ch);
return stacktrace;
}
struct sr_core_stacktrace *
sr_core_stacktrace_from_gdb(const char *gdb_output, const char *core_file,
const char *exe_file, char **error_msg)
{
/* I'm not going to rewrite it now since the function is not being used. */
assert(error_msg);
/* Initialize error_msg to 'no error'. */
*error_msg = NULL;
struct core_handle *ch = open_coredump(core_file, exe_file, error_msg);
if (*error_msg)
return NULL;
struct sr_gdb_stacktrace *gdb_stacktrace;
struct sr_location location;
sr_location_init(&location);
gdb_stacktrace = sr_gdb_stacktrace_parse(&gdb_output, &location);
if (!gdb_stacktrace)
{
*error_msg = sr_location_to_string(&location);
core_handle_free(ch);
return NULL;
}
struct sr_core_stacktrace *core_stacktrace = sr_core_stacktrace_new();
for (struct sr_gdb_thread *gdb_thread = gdb_stacktrace->threads;
gdb_thread;
gdb_thread = gdb_thread->next)
{
struct sr_core_thread *core_thread = sr_core_thread_new();
for (struct sr_gdb_frame *gdb_frame = gdb_thread->frames;
gdb_frame;
gdb_frame = gdb_frame->next)
{
if (gdb_frame->signal_handler_called)
continue;
struct sr_core_frame *core_frame = resolve_frame(ch->dwfl,
gdb_frame->address, false);
core_thread->frames = sr_core_frame_append(core_thread->frames,
core_frame);
}
if (sr_gdb_stacktrace_find_crash_thread(gdb_stacktrace) == gdb_thread)
{
core_stacktrace->crash_thread = core_thread;
}
core_stacktrace->threads = sr_core_thread_append(
core_stacktrace->threads, core_thread);
}
core_stacktrace->signal = get_signal_number(ch->eh, core_file);
core_stacktrace->executable = realpath(exe_file, NULL);
core_handle_free(ch);
sr_gdb_stacktrace_free(gdb_stacktrace);
return core_stacktrace;
}
struct sr_core_stacktrace *
sr_parse_coredump(const char *core_file,
const char *exe_file,
char **error_msg)
{
struct sr_core_stacktrace *stacktrace = NULL;
/* Initialize error_msg to 'no error'. */
if (error_msg)
*error_msg = NULL;
struct core_handle *ch = open_coredump(core_file, exe_file, error_msg);
if (*error_msg)
return NULL;
unw_addr_space_t as;
struct UCD_info *ui;
as = unw_create_addr_space(&_UCD_accessors, 0);
if (!as)
{
set_error("Failed to create address space");
goto fail_destroy_handle;
}
ui = _UCD_create(core_file);
if (!ui)
{
set_error("Failed to set up core dump accessors for '%s'", core_file);
goto fail_destroy_as;
}
struct exe_mapping_data *s;
for (s = ch->segments; s != NULL; s = s->next)
{
if (_UCD_add_backing_file_at_vaddr(ui, s->start, s->filename) < 0)
{
/* Sometimes produces:
* >_UCD_add_backing_file_at_segment:
* Error reading from '/usr/lib/modules/3.6.9-2.fc17.x86_64/vdso/vdso.so'
* Ignore errors for now & fail later.
*/
warn("Can't add backing file '%s' at addr 0x%jx", s->filename,
(uintmax_t)s->start);
/* goto fail_destroy_ui; */
}
}
stacktrace = sr_core_stacktrace_new();
int tnum, nthreads = _UCD_get_num_threads(ui);
for (tnum = 0; tnum < nthreads; ++tnum)
{
struct sr_core_thread *trace = unwind_thread(ui, as, ch->dwfl, tnum, error_msg);
if (trace)
{
stacktrace->threads = sr_core_thread_append(stacktrace->threads, trace);
}
else
{
sr_core_stacktrace_free(stacktrace);
stacktrace = NULL;
break;
}
}
stacktrace->executable = realpath(exe_file, NULL);
stacktrace->signal = get_signal_number_libunwind(ui);
/* FIXME: is this the best we can do? */
stacktrace->crash_thread = stacktrace->threads;
_UCD_destroy(ui);
fail_destroy_as:
unw_destroy_addr_space(as);
fail_destroy_handle:
core_handle_free(ch);
return stacktrace;
}
