0f40a05309
Recently, the maps for an elf in memory might show up looking like: f0000-f1000 0 r-- /system/lib/libc.so f1000-f2000 0 --- f2000-f3000 1000 r-x /system/lib/libc.so f3000-f4000 2000 rw- /system/lib/libc.so The problem is that there is logic in the code that assumed that the map before the execute map must be the read-only map. In the case above, this is not true. Add a new prev_real_map that will point to the previous map that is not one of these empty maps. This will fix the backtraces that look like this: #00 pc 0000000000050d58 /apex/com.android.runtime/lib64/bionic/libc.so!libc.so (offset 0x50000) (syscall+24) (BuildId: 5252408bf30e395d49ee270b54c77ca4) To get rid of the !libc.so and the offset value, which is not correct. Added new unit tests to verify this. Added new offline test which an empty map between read-only and execute map. Before this change, the backtraces had lines like libc.so!libc.so (offset XXX) would be present. Bug: 148075852 Test: Ran unit tests. Change-Id: Ie04bfc96b8f91ed885cb1e655cf1e346efe48a45 |
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| offline | ||
| elf32.xz | ||
| elf64.xz | ||