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Unified memory allocation functions.

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XMRig 2019-08-02 14:44:38 +07:00
parent 718be7e9aa
commit bdaf28adf8
1 changed files with 17 additions and 64 deletions
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81
src/crypto/randomx/virtual_memory.cpp
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@ -26,80 +26,33 @@ 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.
*/
#include "virtual_memory.hpp"
#include <stdexcept>
#if defined(_WIN32) || defined(__CYGWIN__)
#include <windows.h>
#else
#ifdef __APPLE__
#include <mach/vm_statistics.h>
#endif
#include <sys/types.h>
#include <sys/mman.h>
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
#endif
#if defined(_WIN32) || defined(__CYGWIN__)
std::string getErrorMessage(const char* function) {
LPSTR messageBuffer = nullptr;
size_t size = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);
std::string message(messageBuffer, size);
LocalFree(messageBuffer);
return std::string(function) + std::string(": ") + message;
}
#endif
#include "crypto/common/VirtualMemory.h"
#include "virtual_memory.hpp"
void* allocExecutableMemory(std::size_t bytes) {
void* mem;
#if defined(_WIN32) || defined(__CYGWIN__)
mem = VirtualAlloc(nullptr, bytes, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
if (mem == nullptr)
throw std::runtime_error(getErrorMessage("allocExecutableMemory - VirtualAlloc"));
#else
mem = mmap(nullptr, bytes, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (mem == MAP_FAILED)
throw std::runtime_error("allocExecutableMemory - mmap failed");
#endif
return mem;
void *mem = xmrig::VirtualMemory::allocateExecutableMemory(bytes);
if (mem == nullptr) {
throw std::runtime_error("Failed to allocate executable memory");
}
return mem;
}
constexpr std::size_t align(std::size_t pos, std::size_t align) {
return ((pos - 1) / align + 1) * align;
}
void* allocLargePagesMemory(std::size_t bytes) {
void* mem;
#if defined(_WIN32) || defined(__CYGWIN__)
auto pageMinimum = GetLargePageMinimum();
if (pageMinimum > 0)
mem = VirtualAlloc(NULL, align(bytes, pageMinimum), MEM_COMMIT | MEM_RESERVE | MEM_LARGE_PAGES, PAGE_READWRITE);
else
throw std::runtime_error("allocLargePagesMemory - Large pages are not supported");
if (mem == nullptr)
throw std::runtime_error(getErrorMessage("allocLargePagesMemory - VirtualAlloc"));
#else
#ifdef __APPLE__
mem = mmap(nullptr, bytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, VM_FLAGS_SUPERPAGE_SIZE_2MB, 0);
#elif defined(__FreeBSD__)
mem = mmap(nullptr, bytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_ALIGNED_SUPER, -1, 0);
#else
mem = mmap(nullptr, bytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, -1, 0);
#endif
if (mem == MAP_FAILED)
throw std::runtime_error("allocLargePagesMemory - mmap failed");
#endif
return mem;
void *mem = xmrig::VirtualMemory::allocateLargePagesMemory(bytes);
if (mem == nullptr) {
throw std::runtime_error("Failed to allocate large pages memory");
}
return mem;
}
void freePagedMemory(void* ptr, std::size_t bytes) {
#if defined(_WIN32) || defined(__CYGWIN__)
VirtualFree(ptr, 0, MEM_RELEASE);
#else
munmap(ptr, bytes);
#endif
xmrig::VirtualMemory::freeLargePagesMemory(ptr, bytes);
}