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8 Commits

Author SHA1 Message Date
Dmitry Muhomor
7268189933 mte: use tag 0 for freed slots, stop reserving tag 15 2024-01-23 12:56:54 -05:00
Dmitry Muhomor
5fbbdc2ef8 memtag_test: add test for MADV_DONTNEED behavior 2024-01-23 12:56:54 -05:00
Dmitry Muhomor
4756716904 memtag_test: move SEGV code checks to device-side binary 2024-01-23 12:56:54 -05:00
Dmitry Muhomor
88b3c1acf9 memtag_test: fix sporadic failures of overflow/underflow tests 2023-11-01 17:33:20 -04:00
Dmitry Muhomor
f16ef601d4 memtag_test: improve capturing of test results 
Using debuggerd + logcat parsing is unreliable and slow, print SEGV signal code to stderr instead.
 2023-10-30 14:20:53 -04:00
Dmitry Muhomor
155800526a memtag_test: improve tag_distinctness test 
- check that tag distinctess checks are actually reached (it was previously verified manually by
looking at the now-removed printf output)
- check that only non-reserved tags are used
- check that all of non-reserved tags are used
- print tag usage statistics at the end of run
 2023-10-30 14:20:53 -04:00
Dmitry Muhomor
28d5d394cf memtag_test: remove usages of rand() 
It didn't work correctly due to not being seeded and its usage wasn't necessary.
 2023-10-30 14:20:53 -04:00
Dmitry Muhomor
576328b1b4 android: add MTE tests 
To run them, connect an MTE-enabled device via adb and execute `atest HMallocTest:MemtagTest`.

Since these tests are not deterministic (and neither is hardened_malloc itself), it's better to run
them multiple times, e.g. `atest --iterations 30 HMallocTest:MemtagTest`.

There are also CTS tests that are useful for checking correctness of the Android integration:
`atest CtsTaggingHostTestCases`
 2023-10-30 14:20:53 -04:00