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GH-141794: Limit size of generated machine code. (GH-142228)

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* Factor out bodies of the largest uops, to reduce jit code size.
* Factor out common assert, also reducing jit code size.
* Limit size of jitted code for a single executor to 1MB.
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Mark Shannon 2025-12-03 17:43:35 +00:00 • committed by GitHub
parent aea5531583
commit 62423c9c36
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14 changed files with 1406 additions and 1731 deletions
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3
Include/internal/pycore_jit.h
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@ -13,6 +13,9 @@ extern "C" {
# error "this header requires Py_BUILD_CORE define"
#endif
/* To be able to reason about code layout and branches, keep code size below 1 MB */
#define PY_MAX_JIT_CODE_SIZE ((1 << 20)-1)
#ifdef _Py_JIT
typedef _Py_CODEUNIT *(*jit_func)(_PyInterpreterFrame *frame, _PyStackRef *stack_pointer, PyThreadState *tstate);