const char*
_Py_DumpTracebackThreads(int fd, PyInterpreterState *interp,
PyThreadState *current_thread)
{
PyThreadState *tstate;
unsigned int nthreads;
/* Get the current interpreter from the current thread */
tstate = PyInterpreterState_ThreadHead(interp);
if (tstate == NULL)
return "unable to get the thread head state";
/* Dump the traceback of each thread */
tstate = PyInterpreterState_ThreadHead(interp);
nthreads = 0;
do
{
if (nthreads != 0)
write(fd, "\n", 1);
if (nthreads >= MAX_NTHREADS) {
PUTS(fd, "...\n");
break;
}
write_thread_id(fd, tstate, tstate == current_thread);
dump_traceback(fd, tstate, 0);
tstate = PyThreadState_Next(tstate);
nthreads++;
} while (tstate != NULL);
return NULL;
}
void
_Py_DumpTraceback(int fd, PyThreadState *tstate)
{
dump_traceback(fd, tstate, 1);
}
/* Dump the traceback of all Python threads into fd. Use write() to write the
traceback and retry if write() is interrupted by a signal (failed with
EINTR), but don't call the Python signal handler.
The caller is responsible to call PyErr_CheckSignals() to call Python signal
handlers if signals were received. */
const char*
_Py_DumpTracebackThreads(int fd, PyInterpreterState *interp,
PyThreadState *current_tstate)
{
PyThreadState *tstate;
unsigned int nthreads;
if (current_tstate == NULL) {
/* _Py_DumpTracebackThreads() is called from signal handlers by
faulthandler.
SIGSEGV, SIGFPE, SIGABRT, SIGBUS and SIGILL are synchronous signals
and are thus delivered to the thread that caused the fault. Get the
Python thread state of the current thread.
PyThreadState_Get() doesn't give the state of the thread that caused
the fault if the thread released the GIL, and so this function
cannot be used. Read the thread specific storage (TSS) instead: call
PyGILState_GetThisThreadState(). */
current_tstate = PyGILState_GetThisThreadState();
}
if (interp == NULL) {
if (current_tstate == NULL) {
interp = _PyGILState_GetInterpreterStateUnsafe();
if (interp == NULL) {
/* We need the interpreter state to get Python threads */
return "unable to get the interpreter state";
}
}
else {
interp = current_tstate->interp;
}
}
assert(interp != NULL);
/* Get the current interpreter from the current thread */
tstate = PyInterpreterState_ThreadHead(interp);
if (tstate == NULL)
return "unable to get the thread head state";
/* Dump the traceback of each thread */
tstate = PyInterpreterState_ThreadHead(interp);
nthreads = 0;
_Py_BEGIN_SUPPRESS_IPH
do
{
if (nthreads != 0)
PUTS(fd, "\n");
if (nthreads >= MAX_NTHREADS) {
PUTS(fd, "...\n");
break;
}
write_thread_id(fd, tstate, tstate == current_tstate);
dump_traceback(fd, tstate, 0);
tstate = PyThreadState_Next(tstate);
nthreads++;
} while (tstate != NULL);
_Py_END_SUPPRESS_IPH
return NULL;
}