[3.8] bpo-38070: Py_FatalError() logs runtime state (GH-16258)

* bpo-38070: _Py_DumpTraceback() writes <no Python frame> (GH-16244)

When a Python thread has no frame, _Py_DumpTraceback() and
_Py_DumpTracebackThreads() now write "<no Python frame>", rather than
writing nothing.

(cherry picked from commit 8fa3e1740b3f03ea65ddb68411c2238c5f98eec2)

* bpo-38070: Enhance _PyObject_Dump() (GH-16243)

_PyObject_Dump() now dumps the object address for freed objects and
objects with ob_type=NULL.

(cherry picked from commit b39afb78768418d9405c4b528c80fa968ccc974d)

* bpo-38070: Add _PyRuntimeState.preinitializing (GH-16245)

Add _PyRuntimeState.preinitializing field: set to 1 while
Py_PreInitialize() is running.

_PyRuntimeState: rename also pre_initialized field to preinitialized.

(cherry picked from commit d3b904144e86e2442961de6a7dccecbe133d5c6d)

* bpo-38070: Py_FatalError() logs runtime state (GH-16246)


(cherry picked from commit 1ce16fb0977283ae42a9f8917bbca5f44aa69324)

1 files changed, 8 insertions, 5 deletions

diff --git a/Python/traceback.c b/Python/traceback.c
index 0463eb6..8e2f15e 100644
--- a/Python/traceback.c
+++ b/Python/traceback.c
@@ -797,12 +797,15 @@ dump_traceback(int fd, PyThreadState *tstate, int write_header)
     PyFrameObject *frame;
     unsigned int depth;
 
-    if (write_header)
+    if (write_header) {
         PUTS(fd, "Stack (most recent call first):\n");
+    }
 
     frame = _PyThreadState_GetFrame(tstate);
-    if (frame == NULL)
+    if (frame == NULL) {
+        PUTS(fd, "<no Python frame>\n");
         return;
+    }
 
     depth = 0;
     while (frame != NULL) {
@@ -870,9 +873,9 @@ _Py_DumpTracebackThreads(int fd, PyInterpreterState *interp,
            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(). */
+           the fault if the thread released the GIL, and so
+           _PyThreadState_GET() cannot be used. Read the thread specific
+           storage (TSS) instead: call PyGILState_GetThisThreadState(). */
         current_tstate = PyGILState_GetThisThreadState();
     }