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| author |  Peter Zijlstra <peterz@infradead.org>
| 2020-03-12 09:34:42 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org>
| 2020-03-25 18:28:29 +0100 |
| commit | 2a362ecc3ec9632aeea4b9a9062db91b2bd9975a (patch) | |
| tree | 862c13b17b3b80cd22d5e7d82a9c16254720b494 /tools/objtool/Build | |
| parent | objtool: Optimize find_section_by_name() (diff) | |
| download | linux-2a362ecc3ec9632aeea4b9a9062db91b2bd9975a.tar.gz linux-2a362ecc3ec9632aeea4b9a9062db91b2bd9975a.tar.bz2 linux-2a362ecc3ec9632aeea4b9a9062db91b2bd9975a.zip | |
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) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20200324160924.499016559@infradead.org
Diffstat (limited to 'tools/objtool/Build')
| -rw-r--r-- | tools/objtool/Build | 5 |
1 files changed, 5 insertions, 0 deletions
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) |