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bpo-40533: Disable GC in subinterpreters #19961

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May 6, 2020
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bpo-40533: Disable GC in subinterpreters #19961

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8 changes: 8 additions & 0 deletions Modules/gcmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1181,6 +1181,14 @@ collect(PyThreadState *tstate, int generation,
_PyTime_t t1 = 0; /* initialize to prevent a compiler warning */
GCState *gcstate = &tstate->interp->gc;

#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
if (tstate->interp->config._isolated_interpreter) {
// bpo-40533: The garbage collector must not be run on parallel on
// Python objects shared by multiple interpreters.
return 0;
}
#endif

if (gcstate->debug & DEBUG_STATS) {
PySys_WriteStderr("gc: collecting generation %d...\n", generation);
show_stats_each_generations(gcstate);
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