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objtool: Move objtool_file struct off the stack 

commit 0c671812f1 upstream.

Objtool uses over 512k of stack, thanks to the hash table embedded in
the objtool_file struct.  This causes an unnecessarily large stack
allocation and breaks users with low stack limits.

Move the struct off the stack.

Fixes: 042ba73fe7 ("objtool: Add several performance improvements")
Reported-by: Vassili Karpov <moosotc@gmail.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/df92dcbc4b84b02ffa252f46876df125fb56e2d7.1552954176.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Josh Poimboeuf 2019-03-18 19:09:38 -05:00 committed by Greg Kroah-Hartman
parent 726c28f30a
commit c818b2face
1 changed files with 2 additions and 1 deletions
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3
tools/objtool/check.c
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@ -2132,9 +2132,10 @@ static void cleanup(struct objtool_file *file)
elf_close(file->elf);
}
static struct objtool_file file;
int check(const char *_objname, bool orc)
{
struct objtool_file file;
int ret, warnings = 0;
objname = _objname;