> >You lose detection of libc usage errors (like strchr() on an
> >unaddressable buffer, etc).
>
This explain seems reasonable, but I tested libsqlite.so with asan just
now, *got an Asan error that about memcmp*, see below, strange... It should
not be detected, Why this happen?
~/codes/gcc-linaro-arm-linux-gnueabihf-4.8-2014.04_linux/bin/arm-linux-gnueabihf-ldd
--root=/home/ libsqlite.so
libdl.so not found
liblog.so not found
libicuuc.so not found
libicui18n.so not found
libutils.so not found
libc.so not found
libstdc++.so not found
libm.so not found
libasan.so.1 not found
==2722==ERROR: AddressSanitizer: global-buffer-overflow on address
0x409e32a9 at pc 0x409ccc59 bp 0xbed53abc sp 0xbed53ab4
READ of size 1 at 0x409e32a9 thread T0
#0 0x409ccc57 (/system/lib/libsqlite.so+0xd5c57)
#1 0x409684db (/system/lib/libsqlite.so+0x714db)
...
... ...
0x409e32a9 is located 55 bytes to the left of global variable '*.LC1241'
from 'external/sqlite/dist/sqlite3.c' (0x409e32e0) of size 10
'*.LC1241' is ascii string 'unix-none'
0x409e32a9 is located 4 bytes to the right of global variable '*.LC1240'
from 'external/sqlite/dist/sqlite3.c' (0x409e32a0) of size 5
'*.LC1240' is ascii string 'unix'
The error code is in the sqlite3.c:
if(* memcmp*(pVfs->zName,"unix-excl",10)==0 ){
pNew->ctrlFlags |= UNIXFILE_EXCL;
}
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