linker: Add library load and unload hooks for HWASan.
These hooks notify the HWASan runtime library whenever a library is loaded
or unloaded so that it can update its shadow memory.
Bug: 138159093
Test: walleye_hwasan-userdebug boots with+without https://reviews.llvm.org/D65770
Change-Id: I6caf2a6540ed2c0d94db444e806a3c7ba504cabb
diff --git a/linker/linker.cpp b/linker/linker.cpp
index df7dd40..0361a8a 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -1905,6 +1905,9 @@
!get_cfi_shadow()->AfterLoad(si, solist_get_head())) {
return false;
}
+ if (__libc_shared_globals()->load_hook) {
+ __libc_shared_globals()->load_hook(si->load_bias, si->phdr, si->phnum);
+ }
}
return true;
@@ -2039,6 +2042,9 @@
si);
notify_gdb_of_unload(si);
unregister_soinfo_tls(si);
+ if (__libc_shared_globals()->unload_hook) {
+ __libc_shared_globals()->unload_hook(si->load_bias, si->phdr, si->phnum);
+ }
get_cfi_shadow()->BeforeUnload(si);
soinfo_free(si);
}