tree 9f1b6db4e8ae6cbb25af7b6ac1e1a516acde0848
parent 0cd818a377157326ce326e8a48ea00882d1d1d06
author Peter Collingbourne <pcc@google.com> 1556665513 -0700
committer Peter Collingbourne <pcc@google.com> 1558048241 -0700

Add bootstrap directory to bootstrap linker's search path.

A proposed set of changes:
https://android-review.googlesource.com/q/topic:"no-dup-hwasans"

will cause the HWASAN runtime to be moved from /system/lib64 to
/system/lib64/bootstrap. This causes a problem in the case where libc is built
with HWASAN but init is not built with HWASAN. In this case, libc.so will have
a DT_NEEDED dependency on the HWASAN runtime but init will not. Currently,
init and other bootstrap executables arrange to load bootstrap libraries by
setting rpath, but rpath only has an effect on libraries directly depended
on by the main executable, not libraries indirectly depended on by it. This
means that the loading of the HWASAN runtime will fail.

Instead of relying on rpath to find the bootstrap libraries, modify the
bootstrap linker so that it searches the bootstrap library directory after
searching the rpath.

Change-Id: I297be32e04ecd316ee12b8e694588e1249e2bb89