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9b1157924b
This optimization has already been done in LibC's `assert.h`, which Userland `VERIFY()` calls resolve to. We now use it in the kernel, but with the nicer C++ *unlikely* attribute instead of `__builtin_expect`. This tells the compiler to arrange the generated machine code so that the error-free branches execute faster (e.g. fewer jumps, better cache locality).
28 lines
940 B
C
28 lines
940 B
C
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#define __STRINGIFY_HELPER(x) #x
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#define __STRINGIFY(x) __STRINGIFY_HELPER(x)
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[[noreturn]] void __assertion_failed(const char* msg, const char* file, unsigned line, const char* func);
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#define VERIFY(expr) \
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do { \
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if (!static_cast<bool>(expr)) [[unlikely]] \
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__assertion_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
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} while (0)
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#define VERIFY_NOT_REACHED() VERIFY(false)
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extern "C" {
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[[noreturn]] void _abort();
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[[noreturn]] void abort();
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}
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#define VERIFY_INTERRUPTS_DISABLED() VERIFY(!(cpu_flags() & 0x200))
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#define VERIFY_INTERRUPTS_ENABLED() VERIFY(cpu_flags() & 0x200)
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#define TODO VERIFY_NOT_REACHED
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