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tests/extmod/vfs_fat_finaliser.py: Fix for unix qemu-arm. #7672

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tests/extmod/vfs_fat_finaliser.py: Fix for unix qemu-arm. #7672

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462e34c
unix/Makefile: Disable error compression on arm-linux-gnueabi-gcc.
jimmo Aug 16, 2021
3be4ca1
tests/extmod/vfs_fat_finaliser.py: Ensure alloc at never-used GC blocks.
jimmo Aug 16, 2021
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11 changes: 11 additions & 0 deletions ports/unix/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -290,6 +290,17 @@ else
RUN_TESTS_MPY_CROSS_FLAGS = --mpy-cross-flags='-mcache-lookup-bc'
endif

ifeq ($(CROSS_COMPILE),arm-linux-gnueabi-)
# Force disable error text compression when compiling for ARM as the compiler
# cannot optimise out the giant strcmp list generated for MP_MATCH_COMPRESSED.
# Checked on:
# arm-linux-gnueabi-gcc (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04) 7.5.0
# arm-linux-gnueabi-gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
# See https://github.com/micropython/micropython/pull/7659 for details.
$(info Detected arm-linux-gnueabi-gcc. Disabling error message compression.)
MICROPY_ROM_TEXT_COMPRESSION = 0
endif

include $(TOP)/py/mkrules.mk

.PHONY: test test_full
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7 changes: 7 additions & 0 deletions tests/extmod/vfs_fat_finaliser.py
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Expand Up @@ -56,6 +56,13 @@ def ioctl(self, op, arg):
# Here we test that the finaliser is actually called during a garbage collection.
import gc

# Do a large number of single-block allocations to move the GC head forwards,
# ensuring that the files are allocated from never-before-used blocks and
# therefore couldn't possibly have any references to them left behind on
# the stack.
for i in range(1024):
[]

N = 4
for i in range(N):
n = "x%d" % i
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