dc542cdc9d
* Add default for getting chunk allocator state Makes the API same between the two configurations. * Reduce address space usage for Open Enclave * Fix OE Pal concept * Add support for Pal not to provide time. The lazy return of pages to the OS uses a simple time based heuristic. This enables a PAL to not support time, and return the memory to a central pool immediately. * Update src/backend/backend.h Co-authored-by: Amaury Chamayou <amaury@xargs.fr> Co-authored-by: Amaury Chamayou <amaury@xargs.fr>
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
#pragma once
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#include "pal_noalloc.h"
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#ifdef OPEN_ENCLAVE
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extern "C" void* oe_memset_s(void* p, size_t p_size, int c, size_t size);
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extern "C" int oe_random(void* data, size_t size);
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extern "C" [[noreturn]] void oe_abort();
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namespace snmalloc
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{
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class OpenEnclaveErrorHandler
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{
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public:
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static void print_stack_trace() {}
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[[noreturn]] static void error(const char* const str)
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{
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UNUSED(str);
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oe_abort();
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}
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static constexpr size_t address_bits = Aal::address_bits;
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static constexpr size_t page_size = Aal::smallest_page_size;
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};
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using OpenEnclaveBasePAL = PALNoAlloc<OpenEnclaveErrorHandler>;
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class PALOpenEnclave : public OpenEnclaveBasePAL
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{
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public:
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/**
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* Bitmap of PalFeatures flags indicating the optional features that this
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* PAL supports.
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*/
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static constexpr uint64_t pal_features =
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OpenEnclaveBasePAL::pal_features | Entropy;
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template<bool page_aligned = false>
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static void zero(void* p, size_t size) noexcept
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{
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oe_memset_s(p, size, 0, size);
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}
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/**
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* Source of Entropy
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*/
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static uint64_t get_entropy64()
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{
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uint64_t result = 0;
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if (oe_random(&result, sizeof(result)) != OE_OK)
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error("Failed to get system randomness");
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return result;
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}
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};
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}
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#endif
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