Revert "Add jl_print_task_backtraces()" (#47182)

This reverts commit d89b96b.

src/stackwalk.c

@@ -722,7 +722,7 @@ static void JuliaInitializeLongjmpXorKey(void)
 }
 #endif
 
-JL_UNUSED static uintptr_t ptr_demangle(uintptr_t p) JL_NOTSAFEPOINT
+JL_UNUSED static uintptr_t ptr_demangle(uintptr_t p)
 {
 #if defined(__GLIBC__)
 #if defined(_CPU_X86_)
@@ -854,7 +854,7 @@ _os_ptr_munge(uintptr_t ptr)
 
 extern bt_context_t *jl_to_bt_context(void *sigctx);
 
-void jl_rec_backtrace(jl_task_t *t) JL_NOTSAFEPOINT
+void jl_rec_backtrace(jl_task_t *t)
 {
     jl_task_t *ct = jl_current_task;
     jl_ptls_t ptls = ct->ptls;
@@ -1104,9 +1104,7 @@ JL_DLLEXPORT void jlbacktrace(void) JL_NOTSAFEPOINT
         jl_print_bt_entry_codeloc(bt_data + i);
     }
 }
-
-// Print backtrace for specified task
-JL_DLLEXPORT void jlbacktracet(jl_task_t *t) JL_NOTSAFEPOINT
+JL_DLLEXPORT void jlbacktracet(jl_task_t *t)
 {
     jl_task_t *ct = jl_current_task;
     jl_ptls_t ptls = ct->ptls;
@@ -1123,42 +1121,6 @@ JL_DLLEXPORT void jl_print_backtrace(void) JL_NOTSAFEPOINT
     jlbacktrace();
 }
 
-// Print backtraces for all live tasks, for all threads.
-// WARNING: this is dangerous and can crash if used outside of gdb, if
-// all of Julia's threads are not stopped!
-JL_DLLEXPORT void jl_print_task_backtraces(void) JL_NOTSAFEPOINT
-{
-    for (size_t i = 0; i < jl_n_threads; i++) {
-        jl_ptls_t ptls2 = jl_all_tls_states[i];
-        arraylist_t *live_tasks = &ptls2->heap.live_tasks;
-        size_t n = live_tasks->len;
-        jl_safe_printf("==== Thread %d created %zu live tasks\n",
-                ptls2->tid + 1, n + 1);
-        jl_safe_printf("     ---- Root task (%p)\n", ptls2->root_task);
-        jl_safe_printf("          (sticky: %d, started: %d, state: %d, tid: %d)\n",
-                ptls2->root_task->sticky, ptls2->root_task->started,
-                jl_atomic_load_relaxed(&ptls2->root_task->_state),
-                jl_atomic_load_relaxed(&ptls2->root_task->tid) + 1);
-        jlbacktracet(ptls2->root_task);
-
-        void **lst = live_tasks->items;
-        for (size_t j = 0; j < live_tasks->len; j++) {
-            jl_task_t *t = (jl_task_t *)lst[j];
-            jl_safe_printf("     ---- Task %zu (%p)\n", j + 1, t);
-            jl_safe_printf("          (sticky: %d, started: %d, state: %d, tid: %d)\n",
-                    t->sticky, t->started, jl_atomic_load_relaxed(&t->_state),
-                    jl_atomic_load_relaxed(&t->tid) + 1);
-            if (t->stkbuf != NULL)
-                jlbacktracet(t);
-            else
-                jl_safe_printf("      no stack\n");
-            jl_safe_printf("     ---- End task %zu\n", j + 1);
-        }
-        jl_safe_printf("==== End thread %d\n", ptls2->tid + 1);
-    }
-    jl_safe_printf("==== Done\n");
-}
-
 #ifdef __cplusplus
 }
 #endif