logd: ASAN cleansing

A mixture of fixes and cleanup for LogKlog.cpp and friends.

- sscanf calls strlen.  Check if the string is missing a nul
  terminator, if it is, do not call sscanf.
- replace NULL with nullptr for stronger typechecking.
- pass by reference for simpler code.
- Use ssize_t where possible to check for negative values.
- fix FastCmp to add some validity checking since ASAN reports that
  callers are not making sure pre-conditions are met.
- add fasticmp templates for completeness.
- if the buffer is too small to contain a meaningful time, do not
  call down to log_time::strptime() because it does not limit its
  accesses to the buffer boundaries, instead stopping at a
  terminating nul or invalid match.
- move strnstr to LogUtils.h, drop size checking of needle and
  clearly report the list of needles used with android::strnstr
- replace 'sizeof(static const char[]) - 1' with strlen.

Test: gTest liblog-unit-test, logd-unit-tests & logcat-unit-tests
Bug: 30792935
Bug: 36536248
Bug: 35468874
Bug: 34949125
Bug: 34606909
Bug: 36075298
Bug: 36608728
Change-Id: I161bf03ba029050e809b31cceef03f729d318866

0 files changed, 0 insertions, 0 deletions