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-rw-r--r--src/common/host_memory.cpp13
1 files changed, 2 insertions, 11 deletions
diff --git a/src/common/host_memory.cpp b/src/common/host_memory.cpp
index f14077750..4cbc22b85 100644
--- a/src/common/host_memory.cpp
+++ b/src/common/host_memory.cpp
@@ -363,21 +363,12 @@ private:
363 363
364#ifdef ARCHITECTURE_arm64 364#ifdef ARCHITECTURE_arm64
365 365
366static uint64_t GetRandomU64() {
367 uint64_t ret;
368 ASSERT(getrandom(&ret, sizeof(ret), 0) == 0);
369 return ret;
370}
371
372static void* ChooseVirtualBase(size_t virtual_size) { 366static void* ChooseVirtualBase(size_t virtual_size) {
373 constexpr uintptr_t Map39BitSize = (1ULL << 39); 367 constexpr uintptr_t Map39BitSize = (1ULL << 39);
374 constexpr uintptr_t Map36BitSize = (1ULL << 36); 368 constexpr uintptr_t Map36BitSize = (1ULL << 36);
375 369
376 // Seed the MT with some initial strong randomness. 370 // This is not a cryptographic application, we just want something random.
377 // 371 std::mt19937_64 rng;
378 // This is not a cryptographic application, we just want something more
379 // random than the current time.
380 std::mt19937_64 rng(GetRandomU64());
381 372
382 // We want to ensure we are allocating at an address aligned to the L2 block size. 373 // We want to ensure we are allocating at an address aligned to the L2 block size.
383 // For Qualcomm devices, we must also allocate memory above 36 bits. 374 // For Qualcomm devices, we must also allocate memory above 36 bits.