Exemplos de protectionOfRegion em C++ (Cpp)

Exemplo n.º 1

Arquivo: CheckedMalloc.cpp Projeto: SchleunigerAG/WinEC7_Qt5.3.1_Fixes

void makeLargeMallocFailSilently()
{
    malloc_zone_t* zone = malloc_default_zone();

#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
    mach_vm_address_t pageStart = reinterpret_cast<vm_address_t>(zone) & static_cast<vm_size_t>(~(getpagesize() - 1));
    vm_prot_t initialProtection = protectionOfRegion(pageStart);

    vm_size_t len = reinterpret_cast<vm_address_t>(zone) - pageStart + sizeof(malloc_zone_t);
    if (mach_vm_protect(mach_task_self(), pageStart, len, 0, initialProtection | VM_PROT_WRITE))
        CRASH();
#endif

    savedMalloc = zone->malloc;
    savedRealloc = zone->realloc;
    zone->malloc = checkedMalloc;
    zone->realloc = checkedRealloc;

#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
    if (mach_vm_protect(mach_task_self(), pageStart, len, 0, initialProtection))
        CRASH();
#endif
}

Exemplo n.º 2

Arquivo: CheckedMalloc.cpp Projeto: 0x4d52/JavaScriptCore-X

void makeLargeMallocFailSilently()
{
    malloc_zone_t* zone = malloc_default_zone();

#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
    mach_vm_address_t pageStart = reinterpret_cast<vm_address_t>(zone) & static_cast<vm_size_t>(~(getpagesize() - 1));
    vm_prot_t initialProtection = protectionOfRegion(pageStart);

    vm_size_t len = reinterpret_cast<vm_address_t>(zone) - pageStart + sizeof(malloc_zone_t);
    if (mach_vm_protect(mach_task_self(), pageStart, len, 0, initialProtection | VM_PROT_WRITE))
        CRASH();
#endif

    savedMalloc = zone->malloc;
    savedRealloc = zone->realloc;
    zone->malloc = checkedMalloc;
    zone->realloc = checkedRealloc;

#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
    if (mach_vm_protect(mach_task_self(), pageStart, len, 0, initialProtection))
        CRASH();
#endif
}