linker: Speed up find_loaded_library_by_inode()
Rearrange the st_dev and st_ino checks to reduce the number of
comparison needed.
Test: Ran cameraserver on a Go device. Measured time spent in the linker
and saw ~1% speed-up.
Change-Id: I8e977ff37925eae3ba8348e7c4a01ce8af3b9b6d
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 7bc3529..9bb6557 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -1222,12 +1222,14 @@
off64_t file_offset,
bool search_linked_namespaces,
soinfo** candidate) {
+ if (file_stat.st_dev == 0 || file_stat.st_ino == 0) {
+ *candidate = nullptr;
+ return false;
+ }
auto predicate = [&](soinfo* si) {
- return si->get_st_dev() != 0 &&
- si->get_st_ino() != 0 &&
+ return si->get_st_ino() == file_stat.st_ino &&
si->get_st_dev() == file_stat.st_dev &&
- si->get_st_ino() == file_stat.st_ino &&
si->get_file_offset() == file_offset;
};