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9378675213
Whitelist false positive violations cause by a Coverity bug that that overrides the WARN_ON/BUG_ON macros. See nvbug 2277532 for details on the bug. JIRA NVGPU-4031 Change-Id: I395f97c89580195485e93275663a062f26ab6fc7 Signed-off-by: Philip Elcan <pelcan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/2207326 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
/*
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* Copyright (c) 2017-2019, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef NVGPU_BUG_H
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#define NVGPU_BUG_H
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#ifdef __KERNEL__
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#include <linux/bug.h>
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#else
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#include <nvgpu/posix/bug.h>
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#endif
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#include <nvgpu/static_analysis.h>
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/*
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* Define an assert macro that code within nvgpu can use.
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*
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* The goal of this macro is for debugging but what that means varies from OS
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* to OS. On Linux wee don't want to BUG() for general driver misbehaving. BUG()
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* is a very heavy handed tool - in fact there's probably no where within the
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* nvgpu core code where it makes sense to use a BUG() when running under Linux.
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*
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* However, on QNX (and POSIX) BUG() will just kill the current process. This
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* means we can use it for handling bugs in nvgpu.
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*
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* As a result this macro varies depending on platform.
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*/
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#if defined(__KERNEL__)
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#define nvgpu_assert(cond) ((void) WARN_ON(!(cond)))
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#else
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/*
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* A static inline for POSIX/QNX/etc so that we can hide the branch in BUG_ON()
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* from the branch analyzer. This prevents unit testing branch analysis from
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* marking this as an untested branch everywhere the nvgpu_assert() macro is
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* used. Similarly for MISRA this hides the messy BUG_ON() macro from users of
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* this function. This means the MISRA scanner will only trigger 1 issue for
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* this instead of 1 for every place it's used.
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*
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* When this assert fails the function will not return.
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*/
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static inline void nvgpu_assert(bool cond)
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{
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NVGPU_COV_WHITELIST_BLOCK_BEGIN(false_positive, 1, NVGPU_MISRA(Rule, 14_4), "Bug 2277532")
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NVGPU_COV_WHITELIST_BLOCK_BEGIN(false_positive, 1, NVGPU_MISRA(Rule, 15_6), "Bug 2277532")
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BUG_ON(!cond);
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NVGPU_COV_WHITELIST_BLOCK_END(NVGPU_MISRA(Rule, 14_4))
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NVGPU_COV_WHITELIST_BLOCK_END(NVGPU_MISRA(Rule, 15_6))
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}
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#endif
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/*
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* Define simple macros to force the consequences of a failed assert
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* (presumably done in a previous if statement).
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* The exact behavior will be OS dependent. See above.
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*/
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#define nvgpu_do_assert() nvgpu_assert(false)
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/*
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* Define compile-time assert check.
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*/
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#define ASSERT_CONCAT_(a, b) a##b
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#define ASSERT_CONCAT(a, b) ASSERT_CONCAT_(a, b)
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#define nvgpu_static_assert(e) \
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enum { \
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ASSERT_CONCAT(assert_line_, __LINE__) = 1 / (!!(e)) \
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}
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struct gk20a;
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void nvgpu_do_assert_print(struct gk20a *g, const char *fmt, ...);
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#endif /* NVGPU_BUG_H */
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