Source/bmalloc/bmalloc/IsoHeap.cpp

/*
 * Copyright (C) 2020-2021 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
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 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 */

#include "IsoHeap.h"

#if BUSE(LIBPAS)

#ifndef PAS_BMALLOC
#define PAS_BMALLOC 1
#endif
#include "bmalloc_heap_inlines.h"

#include "IsoMallocFallback.h"

namespace bmalloc { namespace api {

void* isoAllocate(pas_heap_ref& heapRef)
{
    // FIXME: libpas should know how to do the fallback thing.
    // https://bugs.webkit.org/show_bug.cgi?id=227177
    
    if (IsoMallocFallback::shouldTryToFallBack()) {
        IsoMallocFallback::MallocResult result = IsoMallocFallback::tryMalloc(
            pas_simple_type_size(reinterpret_cast<pas_simple_type>(heapRef.type)));
        if (result.didFallBack) {
            RELEASE_BASSERT(result.ptr);
            return result.ptr;
        }
    }

    return bmalloc_iso_allocate_inline(&heapRef);
}

void* isoTryAllocate(pas_heap_ref& heapRef)
{
    if (IsoMallocFallback::shouldTryToFallBack()) {
        IsoMallocFallback::MallocResult result = IsoMallocFallback::tryMalloc(
            pas_simple_type_size(reinterpret_cast<pas_simple_type>(heapRef.type)));
        if (result.didFallBack)
            return result.ptr;
    }

    return bmalloc_try_iso_allocate_inline(&heapRef);
}

void isoDeallocate(void* ptr)
{
    if (IsoMallocFallback::shouldTryToFallBack()
        && IsoMallocFallback::tryFree(ptr))
        return;

    bmalloc_deallocate_inline(ptr);
}

} } // namespace bmalloc::api

#endif // BUSE(LIBPAS)