gen_app_partitions.py: make generated/app_smem_*.ld files deterministic
Dictionaries are not ordered in Python 3.5 and before, so building twice
in a row could lead to a different partition order, different
build/zephyr/include/generated/app_smem_*.ld files and different
binaries.
Fix with a minor change to the "for" loop in the output function:
make it iterate on sorted(partitions.items()) instead of the raw and
randomly ordered partitions dictionary.
It is easy to reproduce the issue even without downgrading to an
obsolete Python version; pick a test like samples/userspace/shared_mem/
and simply change the code to this:
--- a/scripts/gen_app_partitions.py
+++ b/scripts/gen_app_partitions.py
@@ -159,10 +159,12 @@ def parse_elf_file(partitions):
partitions[partition_name][SZ] += size
+import random
def generate_final_linker(linker_file, partitions):
string = linker_start_seq
size_string = ''
- for partition, item in sorted(partitions.items()):
+ for partition, item in sorted(partitions.items(),
+ key=lambda x: random.random()):
string += data_template.format(partition)
if LIB in item:
for lib in item[LIB]:
Signed-off-by: Marc Herbert <marc.herbert@intel.com>
1 file changed
