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bpo-46476: Fix memory leak in code objects generated by deepfreeze (GH-30853)

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Add _Py_Deepfreeze_Fini() and _PyStaticCode_Dealloc() functions.
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Kumar Aditya 2022-01-27 18:33:47 +05:30 • committed by GitHub
parent ecfacc362d
commit c7f810b34d
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8 changed files with 39 additions and 0 deletions
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5
Tools/scripts/deepfreeze.py
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@ -109,6 +109,7 @@ class Printer:
self.cache: Dict[tuple[type, object, str], str] = {}
self.hits, self.misses = 0, 0
self.patchups: list[str] = []
self.deallocs: list[str] = []
self.write('#include "Python.h"')
self.write('#include "internal/pycore_gc.h"')
self.write('#include "internal/pycore_code.h"')
@ -277,6 +278,7 @@ class Printer:
self.write(f".co_varnames = {co_varnames},")
self.write(f".co_cellvars = {co_cellvars},")
self.write(f".co_freevars = {co_freevars},")
self.deallocs.append(f"_PyStaticCode_Dealloc(&{name}, (_Py_CODEUNIT *) {removesuffix(co_code, '.ob_base.ob_base')}.ob_sval);")
return f"& {name}.ob_base"
def generate_tuple(self, name: str, t: Tuple[object, ...]) -> str:
@ -440,6 +442,9 @@ def generate(args: list[str], output: TextIO) -> None:
else:
code = compile(fd.read(), f"<frozen {modname}>", "exec")
printer.generate_file(modname, code)
with printer.block(f"void\n_Py_Deepfreeze_Fini(void)"):
for p in printer.deallocs:
printer.write(p)
if verbose:
print(f"Cache hits: {printer.hits}, misses: {printer.misses}")