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objtool: Add a statistics mode

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Have it print a few numbers which can be used to size the hashtables.

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/20200324160924.321381240@infradead.org
This commit is contained in:
Peter Zijlstra
2020-03-12 09:26:29 +01:00
parent 65fb11a7f6
commit 1e11f3fdc3
4 changed files with 25 additions and 3 deletions
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5
tools/objtool/check.c
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@@ -239,6 +239,7 @@ static int decode_instructions(struct objtool_file *file)
struct symbol *func;
unsigned long offset;
struct instruction *insn;
unsigned long nr_insns = 0;
int ret;
for_each_sec(file, sec) {
@@ -274,6 +275,7 @@ static int decode_instructions(struct objtool_file *file)
hash_add(file->insn_hash, &insn->hash, insn->offset);
list_add_tail(&insn->list, &file->insn_list);
nr_insns++;
}
list_for_each_entry(func, &sec->symbol_list, list) {
@@ -291,6 +293,9 @@ static int decode_instructions(struct objtool_file *file)
}
}
if (stats)
printf("nr_insns: %lu\n", nr_insns);
return 0;
err: