92 lines
3.3 KiB
Python
92 lines
3.3 KiB
Python
# Test that native code loaded from a .mpy file is retained after a GC.
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try:
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import gc, sys, uio, uos
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sys.implementation._mpy
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uio.IOBase
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uos.mount
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except (ImportError, AttributeError):
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print("SKIP")
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raise SystemExit
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class UserFile(uio.IOBase):
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def __init__(self, data):
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self.data = memoryview(data)
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self.pos = 0
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def readinto(self, buf):
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n = min(len(buf), len(self.data) - self.pos)
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buf[:n] = self.data[self.pos : self.pos + n]
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self.pos += n
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return n
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def ioctl(self, req, arg):
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return 0
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class UserFS:
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def __init__(self, files):
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self.files = files
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def mount(self, readonly, mksfs):
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pass
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def umount(self):
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pass
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def stat(self, path):
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if path in self.files:
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return (32768, 0, 0, 0, 0, 0, 0, 0, 0, 0)
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raise OSError
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def open(self, path, mode):
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return UserFile(self.files[path])
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# Pre-compiled examples/natmod/features0 example for various architectures, keyed
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# by the required value of sys.implementation._mpy.
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features0_file_contents = {
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# -march=x64
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0x806: b'M\x06\b\x1f\x01\x004build/features0.native.mpy\x00\x8aB\xe9/\x00\x00\x00SH\x8b\x1d\x83\x00\x00\x00\xbe\x02\x00\x00\x00\xffS\x18\xbf\x01\x00\x00\x00H\x85\xc0u\x0cH\x8bC \xbe\x02\x00\x00\x00[\xff\xe0H\x0f\xaf\xf8H\xff\xc8\xeb\xe6ATUSH\x8b\x1dQ\x00\x00\x00H\x8bG\x08L\x8bc(H\x8bx\x08A\xff\xd4H\x8d5+\x00\x00\x00H\x89\xc5H\x8b\x059\x00\x00\x00\x0f\xb78\xffShH\x89\xefA\xff\xd4H\x8b\x03[]A\\\xc3\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xa0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x85\x00\x12factorial\x00\x10\r$\x01&\x9f \x01"\xff',
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# -march=armv6m
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0x1006: b'M\x06\x10\x1f\x01\x004build/features0.native.mpy\x00\x88"\x18\xe0\x00\x00\x10\xb5\tK\tJ{D\x9cX\x02!\xe3h\x98G\x03\x00\x01 \x00+\x02\xd0XC\x01;\xfa\xe7\x02!#i\x98G\x10\xbd\xc0Fj\x00\x00\x00\x00\x00\x00\x00\xf8\xb5\nN\nK~D\xf4XChgiXh\xb8G\x05\x00\x07K\x08I\xf3XyD\x18\x88ck\x98G(\x00\xb8G h\xf8\xbd\xc0F:\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x1e\x00\x00\x00\x00\x00\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x00\x01\x84\x00\x12factorial\x00\x10\r<\x01>\x9f8\x01:\xff',
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}
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# Populate armv7m-derived archs based on armv6m.
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for arch in (0x1406, 0x1806, 0x1C06, 0x2006):
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features0_file_contents[arch] = features0_file_contents[0x1006]
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if sys.implementation._mpy not in features0_file_contents:
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print("SKIP")
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raise SystemExit
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# These are the test .mpy files.
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user_files = {"/features0.mpy": features0_file_contents[sys.implementation._mpy]}
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# Create and mount a user filesystem.
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uos.mount(UserFS(user_files), "/userfs")
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sys.path.append("/userfs")
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# Import the native function.
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gc.collect()
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from features0 import factorial
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# Free the module that contained the function.
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del sys.modules["features0"]
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# Run a GC cycle which should reclaim the module but not the function.
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gc.collect()
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# Allocate lots of fragmented memory to overwrite anything that was just freed by the GC.
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for i in range(1000):
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[]
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# Run the native function, it should not have been freed or overwritten.
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print(factorial(10))
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# Unmount and undo path addition.
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uos.umount("/userfs")
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sys.path.pop()
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