Need to exclude the "shared" libc.so mapping #1124
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So we still do the right thing if the target process' lowest libc.so
range is a shared mapping, for example:
HNFRI:/ # grep libc.so /proc/22001/maps
6e3e1cd000-6e3e2c7000 r--s 00000000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
71eb6c2000-71eb6ff000 r--p 00000000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
71eb6ff000-71eb781000 r-xp 0003d000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
71eb781000-71eb786000 r--p 000bf000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
71eb786000-71eb787000 rw-p 000c3000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
Originally implemented in 5e8314f, but lost in the injector rewrite.
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6e3e1cd000-6e3e2c7000 r--s 00000000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
71eb6c2000-71eb6ff000 r--p 00000000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
71eb6ff000-71eb781000 r-xp 0003d000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
71eb781000-71eb786000 r--p 000bf000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
71eb786000-71eb787000 rw-p 000c3000 07:08 38 /apex/com.android.runtime/lib64/bionic/libc.so
the first line mapping of the http://libc.so, it's shared , we can't start from it, we need to start from the second line