static int
fileline_initialize (struct backtrace_state *state,
backtrace_error_callback error_callback, void *data)
{
int failed;
fileline fileline_fn;
int pass;
if (!state->threaded)
failed = state->fileline_initialization_failed;
else
failed = backtrace_atomic_load_int (&state->fileline_initialization_failed);
if (failed)
{
error_callback (data, "failed to read executable information", -1);
return 0;
}
if (!state->threaded)
fileline_fn = state->fileline_fn;
else
fileline_fn = backtrace_atomic_load_pointer (&state->fileline_fn);
if (fileline_fn != NULL)
return 1;
/* We have not initialized the information. Do it now. */
const char *filename;
for (pass = 0; pass < 4; ++pass)
{
switch (pass)
{
case 0:
filename = state->filename;
break;
case 1:
filename = getexecname ();
break;
case 2:
filename = "/proc/self/exe";
break;
case 3:
filename = "/proc/curproc/file";
break;
default:
abort ();
}
/* If we've got a filename and the file exists, break. */
if (filename && filename[0] && (access(filename, F_OK) == 0))
break;
filename = NULL;
}
if (!filename)
{
if (state->filename != NULL)
error_callback (data, state->filename, ENOENT);
else
error_callback (data,
"libbacktrace could not find executable to open",
0);
failed = 1;
}
if (!failed)
{
if (!backtrace_initialize (state, filename, 0, 1, error_callback, data,
&fileline_fn))
failed = 1;
}
if (failed)
{
if (!state->threaded)
state->fileline_initialization_failed = 1;
else
backtrace_atomic_store_int (&state->fileline_initialization_failed, 1);
return 0;
}
if (!state->threaded)
state->fileline_fn = fileline_fn;
else
{
backtrace_atomic_store_pointer (&state->fileline_fn, fileline_fn);
/* Note that if two threads initialize at once, one of the data
sets may be leaked. */
}
return 1;
}
static int
fileline_initialize (struct backtrace_state *state,
backtrace_error_callback error_callback, void *data)
{
int failed;
fileline fileline_fn;
int pass;
int called_error_callback;
int descriptor;
if (!state->threaded)
failed = state->fileline_initialization_failed;
else
failed = backtrace_atomic_load_int (&state->fileline_initialization_failed);
if (failed)
{
error_callback (data, "failed to read executable information", -1);
return 0;
}
if (!state->threaded)
fileline_fn = state->fileline_fn;
else
fileline_fn = backtrace_atomic_load_pointer (&state->fileline_fn);
if (fileline_fn != NULL)
return 1;
/* We have not initialized the information. Do it now. */
descriptor = -1;
called_error_callback = 0;
for (pass = 0; pass < 4; ++pass)
{
const char *filename;
int does_not_exist;
switch (pass)
{
case 0:
filename = state->filename;
break;
case 1:
filename = getexecname ();
break;
case 2:
filename = "/proc/self/exe";
break;
case 3:
filename = "/proc/curproc/file";
break;
default:
abort ();
}
if (filename == NULL)
continue;
descriptor = backtrace_open (filename, error_callback, data,
&does_not_exist);
if (descriptor < 0 && !does_not_exist)
{
called_error_callback = 1;
break;
}
if (descriptor >= 0)
break;
}
if (descriptor < 0)
{
if (!called_error_callback)
{
if (state->filename != NULL)
error_callback (data, state->filename, ENOENT);
else
error_callback (data,
"libbacktrace could not find executable to open",
0);
}
failed = 1;
}
if (!failed)
{
if (!backtrace_initialize (state, descriptor, error_callback, data,
&fileline_fn))
failed = 1;
}
if (failed)
{
if (!state->threaded)
state->fileline_initialization_failed = 1;
else
backtrace_atomic_store_int (&state->fileline_initialization_failed, 1);
return 0;
}
if (!state->threaded)
state->fileline_fn = fileline_fn;
else
{
backtrace_atomic_store_pointer (&state->fileline_fn, fileline_fn);
/* Note that if two threads initialize at once, one of the data
sets may be leaked. */
}
return 1;
}
int
backtrace_fileline_initialize (struct backtrace_state *state, uintptr_t base_address, int is_exe,
backtrace_error_callback error_callback, void *data)
{
int failed;
fileline fileline_fn;
if (!state->threaded)
failed = state->fileline_initialization_failed;
else
failed = backtrace_atomic_load_int (&state->fileline_initialization_failed);
if (failed)
{
error_callback (data, "failed to read executable information", -1);
return 0;
}
if (!state->threaded)
fileline_fn = state->fileline_fn;
else
fileline_fn = backtrace_atomic_load_pointer (&state->fileline_fn);
if (fileline_fn != NULL)
return 1;
/* We have not initialized information. Do it now. */
/* For this function, we need a filename and base address. */
if (!state->filename || !base_address)
{
error_callback (data, state->filename, ENOENT);
failed = 1;
}
else
{
if (!backtrace_initialize (state, state->filename, base_address, is_exe,
error_callback, data, &fileline_fn))
failed = 1;
}
if (failed)
{
if (!state->threaded)
state->fileline_initialization_failed = 1;
else
backtrace_atomic_store_int (&state->fileline_initialization_failed, 1);
return 0;
}
if (!state->threaded)
state->fileline_fn = fileline_fn;
else
{
backtrace_atomic_store_pointer (&state->fileline_fn, fileline_fn);
/* Note that if two threads initialize at once, one of the data
sets may be leaked. */
}
return 1;
}
