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lock: disable clang_analyzer for the LOCK_BUG_ON() macro

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The clang analyzer, scan-build, cannot correctly handle the
LOCK_BUG_ON() macro. At multiple places there is the following warning:

  Error: CLANG_WARNING:
    criu/pie/restorer.c:1221:4: warning: Dereference of null pointer

  include/common/lock.h:14:35: note: expanded from macro 'LOCK_BUG_ON'
               *(volatile unsigned long *)NULL = 0xdead0000 + __LINE__
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

This just disable the clang analyzer for the LOCK_BUG_ON() macro.

Signed-off-by: Adrian Reber <areber@redhat.com>
This commit is contained in:
Adrian Reber
2020-10-13 06:17:32 +00:00
committed by Andrei Vagin
parent 70c8c12c64
commit ee048e1489
1 changed files with 3 additions and 0 deletions
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3
include/common/lock.h
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@@ -9,10 +9,13 @@
#include "common/asm/atomic.h"
#include "common/compiler.h"
/* scan-build complains about derefencing a NULL pointer here. */
#ifndef __clang_analyzer__
#define LOCK_BUG_ON(condition) \
if ((condition)) \
*(volatile unsigned long *)NULL = 0xdead0000 + __LINE__
#define LOCK_BUG() LOCK_BUG_ON(1)
#endif /* __clang_analyzer__ */
#ifdef CR_NOGLIBC
# include <compel/plugins/std/syscall.h>