Enable GC dump on OOM

[romanz]

Requires the following MicroPython patch: trezor/micropython#14

[github-actions]

core UI changes	device test	click test	persistence test
T2T1 Model T	test(screens) main(screens)	test(screens) main(screens)	test(screens) main(screens)
T3B1 Safe 3	test(screens) main(screens)	test(screens) main(screens)	test(screens) main(screens)
T3T1 Safe 5	test(screens) main(screens)	test(screens) main(screens)	test(screens) main(screens)
All	main(screens)

[romanz]

Manually tested on T2T1 using the following patch:

diff --git a/core/src/apps/base.py b/core/src/apps/base.py
index 5552fc86ba..0bb5d7b9ac 100644
--- a/core/src/apps/base.py
+++ b/core/src/apps/base.py
@@ -275,6 +275,16 @@ async def handle_Ping(msg: Ping) -> Success:
         from trezor.ui.layouts import confirm_action
 
         await confirm_action("ping", TR.words__confirm, "ping", br_code=B.ProtectCall)
+
+    try:
+        count = int(msg.message)
+    except ValueError:
+        count = 0
+
+    L = ['x']
+    for _ in range(count):
+        L = L + L
+
     return Success(message=msg.message)

Test steps

Collect the log with:

tio /dev/ttyACM0 | tee debug.log

Extract the JSON dump:

awk '/^\[\s?$/,/^\]\s?$/' debug.log >| dump.json 

Analyze and generate memory HTML:

core/tools/analyze-memory-dump.py dump.json 

[mmilata]

Please also create PR in the trezor/micropython repo.