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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).
This commit is contained in:
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