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| author | Mitch Phillips <mitchp@google.com> | 2020-04-17 15:00:37 -0700 |
|---|---|---|
| committer | Mitch Phillips <mitchp@google.com> | 2020-04-17 22:04:27 +0000 |
| commit | b125ca48de1f5960c1ef606120d3c5c0869cd075 (patch) | |
| tree | 8da0b14470d438e9ed331abb6a02f4eb9d42fe84 /libc/malloc_debug/tests/malloc_debug_system_tests.cpp | |
| parent | 23ec1421b539128ec9941deadfc4b30babf6e1b6 (diff) | |
Set the top bit for tagged pointers.
Some applications may incorrectly assume that a "negative" pointer
indicates error. By setting the top bit in TBI mode, we catch these
cases as well. Although they don't directly indicate incompatibility
with MTE (as MTE uses the 2nd-highest nibble) - this ensures we catch
HWASan errors as well as reserve the bits for future MTE expansion.
Bug: 154272452
Test: Boot flame, device boots successfully.
Change-Id: I94a6821a82ce7ead59e6ca2dd113a5a50ee9e56b
Diffstat (limited to 'libc/malloc_debug/tests/malloc_debug_system_tests.cpp')
0 files changed, 0 insertions, 0 deletions