[3.14] gh-149242: Heap size should be added at end of the struct (#149241)

Co-authored-by: Neil Schemenauer <nas-github@arctrix.com>

diff --git a/Doc/data/python3.14.abi b/Doc/data/python3.14.abi
index 78f380ee46d4a5e5d87788ec7b10c5b0512e39f1..09ef37cf4fa434ac6392bf70c2c0a4dad198a03f 100644 (file)
--- a/Doc/data/python3.14.abi
+++ b/Doc/data/python3.14.abi
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@@ -21507,7 +21516,7 @@
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diff --git a/Include/internal/pycore_interp_structs.h b/Include/internal/pycore_interp_structs.h
index 972bf7bf6e805418aa6cdf7dda8c2e5fe813f0e9..b93d6d3c8eda8b3484a5502be1ed7a3ee0af4c66 100644 (file)
--- a/Include/internal/pycore_interp_structs.h
+++ b/Include/internal/pycore_interp_structs.h
@@ -212,11 +212,11 @@ struct _gc_runtime_state {
     /* linked lists of container objects */
 #ifndef Py_GIL_DISABLED
     struct gc_generation generations[NUM_GENERATIONS];
-    PyGC_Head *generation0;
 #else
     struct gc_generation young;
     struct gc_generation old[2];
 #endif
+
     /* a permanent generation which won't be collected */
     struct gc_generation permanent_generation;
     struct gc_generation_stats generation_stats[NUM_GENERATIONS];
@@ -230,6 +230,11 @@ struct _gc_runtime_state {
     /* The number of live objects. */
     Py_ssize_t heap_size;
 
+    /* dummy members to preserve other offsets */
+    Py_ssize_t dummy1; /* was work_to_do */
+    int dummy2; /* was visited_space */
+    int dummy3; /* was phase */
+
     /* This is the number of objects that survived the last full
        collection. It approximates the number of long lived objects
        tracked by the GC.
@@ -255,6 +260,8 @@ struct _gc_runtime_state {
 
     /* Mutex held for gc_should_collect_mem_usage(). */
     PyMutex mutex;
+#else
+    PyGC_Head *generation0;
 #endif
 };