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7 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Jeff Epler
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fca5bbf664 |
tests: Use OBJ_REPR_B compatible mpy file headers.
So these tests can run and pass using OBJ_REPR_B. Signed-off-by: Jeff Epler <jepler@unpythonic.net> |
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Damien George
|
487c94c253 |
tests/extmod/vfs_rom.py: Clear sys.path before running test.
Otherwise if the target has certain files/directories (such as "test") in its filesystem then these interfere with the unit tests. Signed-off-by: Damien George <damien@micropython.org> |
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Damien George
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e4051a1ca6 |
extmod/vfs_rom: Implement minimal VfsRom.getcwd() method.
This is needed if you chdir to a ROMFS and want to query your current
directory.
Prior to this change, using `os.getcwd()` when in a ROMFS would raise:
AttributeError: 'VfsRom' object has no attribute 'getcwd'
Signed-off-by: Damien George <damien@micropython.org>
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Damien George
|
14ba32bb20 |
extmod/vfs_rom: Add bounds checking for all filesystem accesses.
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Testing with ROMFS shows that it is relatively easy to end up with a corrupt filesystem on the device -- eg due to the ROMFS deploy process stopping half way through -- which could lead to hard crashes. Notably, there can be boot loops trying to mount a corrupt filesystem, crashes when importing modules like `os` that first scan the filesystem for `os.py`, and crashing when deploying a new ROMFS in certain cases because the old one is removed while still mounted. The main problem is that `mp_decode_uint()` has an loop that keeps going as long as it reads 0xff byte values, which can happen in the case of erased and unwritten flash. This commit adds full bounds checking in the new `mp_decode_uint_checked()` function, and that makes all ROMFS filesystem accesses robust. Signed-off-by: Damien George <damien@micropython.org> |
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Damien George
|
30acb16ad3 |
extmod/vfs_rom: Remove ability to create VfsRom from an address.
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It's not necessary to support this, which allows an arbitrary memory address to be specified and potentially allows invalid memory accesses. Requiring an object with the buffer protocol is safer, and also means that the length of the region is always specified. Signed-off-by: Damien George <damien@micropython.org> |
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Damien George
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fca8ea6c39 |
tests/extmod/vfs_rom.py: Import errno for test.
It's needed by the test. This previously passed because the compiler (actually parser) optimises away errno constants. Signed-off-by: Damien George <damien@micropython.org> |
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Damien George
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c73204128e |
tests/extmod: Add VfsRom test.
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Provides full coverage of the VfsRom driver. Signed-off-by: Damien George <damien@micropython.org> |