From 2a362ecc3ec9632aeea4b9a9062db91b2bd9975a Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Thu, 12 Mar 2020 09:34:42 +0100 Subject: objtool: Optimize find_symbol_*() and read_symbols() All of: read_symbols(), find_symbol_by_offset(), find_symbol_containing(), find_containing_func() do a linear search of the symbols. Add an RB tree to make it go faster. This about halves objtool runtime on vmlinux.o, from 34s to 18s. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Miroslav Benes Acked-by: Josh Poimboeuf Link: https://lkml.kernel.org/r/20200324160924.499016559@infradead.org --- tools/objtool/Build | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'tools/objtool/Build') diff --git a/tools/objtool/Build b/tools/objtool/Build index 8dc4f0848362..66f44f5cd2a6 100644 --- a/tools/objtool/Build +++ b/tools/objtool/Build @@ -11,6 +11,7 @@ objtool-y += objtool.o objtool-y += libstring.o objtool-y += libctype.o objtool-y += str_error_r.o +objtool-y += librbtree.o CFLAGS += -I$(srctree)/tools/lib @@ -25,3 +26,7 @@ $(OUTPUT)libctype.o: ../lib/ctype.c FORCE $(OUTPUT)str_error_r.o: ../lib/str_error_r.c FORCE $(call rule_mkdir) $(call if_changed_dep,cc_o_c) + +$(OUTPUT)librbtree.o: ../lib/rbtree.c FORCE + $(call rule_mkdir) + $(call if_changed_dep,cc_o_c) -- cgit v1.2.3