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bpo-40514: Add --with-experimental-isolated-subinterpreters (GH-19926)

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Add --with-experimental-isolated-subinterpreters build option to
configure: better isolate subinterpreters, experimental build mode.

When used, force the usage of the libc malloc() memory allocator,
since pymalloc relies on the unique global interpreter lock (GIL).
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Victor Stinner 2020-05-05 16:41:11 +02:00 • committed by GitHub
parent 0b1e3307e2
commit c5fa364f4e
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5 changed files with 60 additions and 0 deletions
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10
Python/preconfig.c
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@ -291,7 +291,17 @@ _PyPreConfig_InitCompatConfig(PyPreConfig *config)
config->coerce_c_locale_warn = 0;
config->dev_mode = -1;
#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
/* bpo-40512: pymalloc is not compatible with subinterpreters,
force usage of libc malloc() which is thread-safe. */
#ifdef Py_DEBUG
config->allocator = PYMEM_ALLOCATOR_MALLOC_DEBUG;
#else
config->allocator = PYMEM_ALLOCATOR_MALLOC;
#endif
#else
config->allocator = PYMEM_ALLOCATOR_NOT_SET;
#endif
#ifdef MS_WINDOWS
config->legacy_windows_fs_encoding = -1;
#endif