gh-101659: Isolate "obmalloc" State to Each Interpreter

Include/internal/pycore_interp.h

@@ -21,8 +21,9 @@ extern "C" {
 #include "pycore_function.h"      // FUNC_MAX_WATCHERS
 #include "pycore_genobject.h"     // struct _Py_async_gen_state
 #include "pycore_gc.h"            // struct _gc_runtime_state
-#include "pycore_list.h"          // struct _Py_list_state
 #include "pycore_global_objects.h"  // struct _Py_interp_static_objects
+#include "pycore_list.h"          // struct _Py_list_state
+#include "pycore_obmalloc.h"      // struct obmalloc_state
 #include "pycore_tuple.h"         // struct _Py_tuple_state
 #include "pycore_typeobject.h"    // struct type_cache
 #include "pycore_unicodeobject.h" // struct _Py_unicode_state
@@ -89,6 +90,8 @@ struct _is {
     int _initialized;
     int finalizing;
 
+    struct _obmalloc_state obmalloc;
+
     struct _ceval_state ceval;
     struct _gc_runtime_state gc;
 

Include/internal/pycore_obmalloc.h

@@ -657,8 +657,11 @@ struct _obmalloc_usage {
 #endif /* WITH_PYMALLOC_RADIX_TREE */
 
 
-struct _obmalloc_state {
+struct _obmalloc_global_state {
     int dump_debug_stats;
+};
+
+struct _obmalloc_state {
     struct _obmalloc_pools pools;
     struct _obmalloc_mgmt mgmt;
     struct _obmalloc_usage usage;

Include/internal/pycore_obmalloc_init.h

@@ -54,9 +54,13 @@ extern "C" {
 #  error "NB_SMALL_SIZE_CLASSES should be less than 64"
 #endif
 
-#define _obmalloc_state_INIT(obmalloc) \
+#define _obmalloc_global_state_INIT \
     { \
         .dump_debug_stats = -1, \
+    }
+
+#define _obmalloc_state_INIT(obmalloc) \
+    { \
         .pools = { \
             .used = _obmalloc_pools_INIT(obmalloc.pools), \
         }, \

Include/internal/pycore_runtime.h

@@ -22,7 +22,6 @@ extern "C" {
 #include "pycore_pymem.h"           // struct _pymem_allocators
 #include "pycore_pyhash.h"          // struct pyhash_runtime_state
 #include "pycore_pythread.h"        // struct _pythread_runtime_state
-#include "pycore_obmalloc.h"        // struct obmalloc_state
 #include "pycore_signal.h"          // struct _signals_runtime_state
 #include "pycore_time.h"            // struct _time_runtime_state
 #include "pycore_tracemalloc.h"     // struct _tracemalloc_runtime_state
@@ -88,7 +87,7 @@ typedef struct pyruntimestate {
     _Py_atomic_address _finalizing;
 
     struct _pymem_allocators allocators;
-    struct _obmalloc_state obmalloc;
+    struct _obmalloc_global_state obmalloc;
     struct pyhash_runtime_state pyhash_state;
     struct _time_runtime_state time;
     struct _pythread_runtime_state threads;

Include/internal/pycore_runtime_init.h

@@ -25,7 +25,7 @@ extern "C" {
             _pymem_allocators_debug_INIT, \
             _pymem_allocators_obj_arena_INIT, \
         }, \
-        .obmalloc = _obmalloc_state_INIT(runtime.obmalloc), \
+        .obmalloc = _obmalloc_global_state_INIT, \
         .pyhash_state = pyhash_state_INIT, \
         .signals = _signals_RUNTIME_INIT, \
         .interpreters = { \
@@ -94,7 +94,7 @@ extern "C" {
                 }, \
             }, \
         }, \
-        ._main_interpreter = _PyInterpreterState_INIT, \
+        ._main_interpreter = _PyInterpreterState_INIT(runtime._main_interpreter), \
     }
 
 #ifdef HAVE_DLOPEN
@@ -110,10 +110,11 @@ extern "C" {
 #  define DLOPENFLAGS_INIT
 #endif
 
-#define _PyInterpreterState_INIT \
+#define _PyInterpreterState_INIT(interp) \
     { \
         .id_refcount = -1, \
         DLOPENFLAGS_INIT \
+        .obmalloc = _obmalloc_state_INIT(interp.obmalloc), \
         .ceval = { \
             .recursion_limit = Py_DEFAULT_RECURSION_LIMIT, \
         }, \