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/*
* Copyright (C) 2014-2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef BAssert_h
#define BAssert_h
#include "BPlatform.h"
#if defined(NDEBUG) && BOS(DARWIN)
#if BCPU(X86_64) || BCPU(X86)
#define BBreakpointTrap() __asm__ volatile ("int3")
#elif BCPU(ARM_THUMB2)
#define BBreakpointTrap() __asm__ volatile ("bkpt #0")
#elif BCPU(ARM64)
#define BBreakpointTrap() __asm__ volatile ("brk #0")
#else
#error "Unsupported CPU".
#endif
// Crash with a SIGTRAP i.e EXC_BREAKPOINT.
// We are not using __builtin_trap because it is only guaranteed to abort, but not necessarily
// trigger a SIGTRAP. Instead, we use inline asm to ensure that we trigger the SIGTRAP.
#define BCRASH() do { \
BBreakpointTrap(); \
__builtin_unreachable(); \
} while (false)
#else // not defined(NDEBUG) && BOS(DARWIN)
#define BCRASH() do { \
*(int*)0xbbadbeef = 0; \
} while (0);
#endif // defined(NDEBUG) && BOS(DARWIN)
#define BASSERT_IMPL(x) do { \
if (!(x)) \
BCRASH(); \
} while (0);
#define RELEASE_BASSERT(x) BASSERT_IMPL(x)
// FIXME: Implement logging: <https://webkit.org/b/155992>
#define RELEASE_BASSERT_WITH_MESSAGE(x, f, ...) BASSERT_IMPL(x)
#define UNUSED(x) (void)x
// ===== Release build =====
#if defined(NDEBUG)
#define BASSERT(x)
#define IF_DEBUG(x)
#endif // defined(NDEBUG)
// ===== Debug build =====
#if !defined(NDEBUG)
#define BASSERT(x) BASSERT_IMPL(x)
#define IF_DEBUG(x) x
#endif // !defined(NDEBUG)
#endif // BAssert_h
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