Duplicate source files for Vulkan.
The Vulkan implementation needs a directory for each architectural
layer, similar to the OpenGL ES stack. The entire rendering stack is
duplicated, leaving only Reactor common between them:
Renderer -> Device
Shader -> Pipeline
Common -> System
Main -> WSI
Bug b/117152542
Change-Id: I9c26b23654016d637f88ec2416f019ef65b9afbd
Reviewed-on: https://swiftshader-review.googlesource.com/c/21248
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
diff --git a/src/System/Memory.cpp b/src/System/Memory.cpp
new file mode 100644
index 0000000..45fef40
--- /dev/null
+++ b/src/System/Memory.cpp
@@ -0,0 +1,262 @@
+// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "Memory.hpp"
+
+#include "Types.hpp"
+#include "Debug.hpp"
+
+#if defined(_WIN32)
+ #ifndef WIN32_LEAN_AND_MEAN
+ #define WIN32_LEAN_AND_MEAN
+ #endif
+ #include <windows.h>
+ #include <intrin.h>
+#else
+ #include <errno.h>
+ #include <sys/mman.h>
+ #include <stdlib.h>
+ #include <unistd.h>
+#endif
+
+#include <memory.h>
+
+#undef allocate
+#undef deallocate
+
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__) || defined (_M_X64)) && !defined(__x86__)
+#define __x86__
+#endif
+
+namespace sw
+{
+namespace
+{
+struct Allocation
+{
+// size_t bytes;
+ unsigned char *block;
+};
+
+void *allocateRaw(size_t bytes, size_t alignment)
+{
+ ASSERT((alignment & (alignment - 1)) == 0); // Power of 2 alignment.
+
+ #if defined(LINUX_ENABLE_NAMED_MMAP)
+ void *allocation;
+ int result = posix_memalign(&allocation, alignment, bytes);
+ if(result != 0)
+ {
+ errno = result;
+ allocation = nullptr;
+ }
+ return allocation;
+ #else
+ unsigned char *block = new unsigned char[bytes + sizeof(Allocation) + alignment];
+ unsigned char *aligned = nullptr;
+
+ if(block)
+ {
+ aligned = (unsigned char*)((uintptr_t)(block + sizeof(Allocation) + alignment - 1) & -(intptr_t)alignment);
+ Allocation *allocation = (Allocation*)(aligned - sizeof(Allocation));
+
+ // allocation->bytes = bytes;
+ allocation->block = block;
+ }
+
+ return aligned;
+ #endif
+}
+
+#if defined(LINUX_ENABLE_NAMED_MMAP)
+// Create a file descriptor for anonymous memory with the given
+// name. Returns -1 on failure.
+// TODO: remove once libc wrapper exists.
+int memfd_create(const char* name, unsigned int flags)
+{
+ #if __aarch64__
+ #define __NR_memfd_create 279
+ #elif __arm__
+ #define __NR_memfd_create 279
+ #elif __powerpc64__
+ #define __NR_memfd_create 360
+ #elif __i386__
+ #define __NR_memfd_create 356
+ #elif __x86_64__
+ #define __NR_memfd_create 319
+ #endif /* __NR_memfd_create__ */
+ #ifdef __NR_memfd_create
+ // In the event of no system call this returns -1 with errno set
+ // as ENOSYS.
+ return syscall(__NR_memfd_create, name, flags);
+ #else
+ return -1;
+ #endif
+}
+
+// Returns a file descriptor for use with an anonymous mmap, if
+// memfd_create fails, -1 is returned. Note, the mappings should be
+// MAP_PRIVATE so that underlying pages aren't shared.
+int anonymousFd()
+{
+ static int fd = memfd_create("SwiftShader JIT", 0);
+ return fd;
+}
+
+// Ensure there is enough space in the "anonymous" fd for length.
+void ensureAnonFileSize(int anonFd, size_t length)
+{
+ static size_t fileSize = 0;
+ if(length > fileSize)
+ {
+ ftruncate(anonFd, length);
+ fileSize = length;
+ }
+}
+#endif // defined(LINUX_ENABLE_NAMED_MMAP)
+
+} // anonymous namespace
+
+size_t memoryPageSize()
+{
+ static int pageSize = 0;
+
+ if(pageSize == 0)
+ {
+ #if defined(_WIN32)
+ SYSTEM_INFO systemInfo;
+ GetSystemInfo(&systemInfo);
+ pageSize = systemInfo.dwPageSize;
+ #else
+ pageSize = sysconf(_SC_PAGESIZE);
+ #endif
+ }
+
+ return pageSize;
+}
+
+void *allocate(size_t bytes, size_t alignment)
+{
+ void *memory = allocateRaw(bytes, alignment);
+
+ if(memory)
+ {
+ memset(memory, 0, bytes);
+ }
+
+ return memory;
+}
+
+void deallocate(void *memory)
+{
+ #if defined(LINUX_ENABLE_NAMED_MMAP)
+ free(memory);
+ #else
+ if(memory)
+ {
+ unsigned char *aligned = (unsigned char*)memory;
+ Allocation *allocation = (Allocation*)(aligned - sizeof(Allocation));
+
+ delete[] allocation->block;
+ }
+ #endif
+}
+
+void *allocateExecutable(size_t bytes)
+{
+ size_t pageSize = memoryPageSize();
+ size_t length = (bytes + pageSize - 1) & ~(pageSize - 1);
+ void *mapping;
+
+ #if defined(LINUX_ENABLE_NAMED_MMAP)
+ // Try to name the memory region for the executable code,
+ // to aid profilers.
+ int anonFd = anonymousFd();
+ if(anonFd == -1)
+ {
+ mapping = mmap(nullptr, length, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ }
+ else
+ {
+ ensureAnonFileSize(anonFd, length);
+ mapping = mmap(nullptr, length, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE, anonFd, 0);
+ }
+
+ if(mapping == MAP_FAILED)
+ {
+ mapping = nullptr;
+ }
+ #else
+ mapping = allocate(length, pageSize);
+ #endif
+
+ return mapping;
+}
+
+void markExecutable(void *memory, size_t bytes)
+{
+ #if defined(_WIN32)
+ unsigned long oldProtection;
+ VirtualProtect(memory, bytes, PAGE_EXECUTE_READ, &oldProtection);
+ #else
+ mprotect(memory, bytes, PROT_READ | PROT_EXEC);
+ #endif
+}
+
+void deallocateExecutable(void *memory, size_t bytes)
+{
+ #if defined(_WIN32)
+ unsigned long oldProtection;
+ VirtualProtect(memory, bytes, PAGE_READWRITE, &oldProtection);
+ deallocate(memory);
+ #elif defined(LINUX_ENABLE_NAMED_MMAP)
+ size_t pageSize = memoryPageSize();
+ size_t length = (bytes + pageSize - 1) & ~(pageSize - 1);
+ munmap(memory, length);
+ #else
+ mprotect(memory, bytes, PROT_READ | PROT_WRITE);
+ deallocate(memory);
+ #endif
+}
+
+void clear(uint16_t *memory, uint16_t element, size_t count)
+{
+ #if defined(_MSC_VER) && defined(__x86__) && !defined(MEMORY_SANITIZER)
+ __stosw(memory, element, count);
+ #elif defined(__GNUC__) && defined(__x86__) && !defined(MEMORY_SANITIZER)
+ __asm__("rep stosw" : : "D"(memory), "a"(element), "c"(count));
+ #else
+ for(size_t i = 0; i < count; i++)
+ {
+ memory[i] = element;
+ }
+ #endif
+}
+
+void clear(uint32_t *memory, uint32_t element, size_t count)
+{
+ #if defined(_MSC_VER) && defined(__x86__) && !defined(MEMORY_SANITIZER)
+ __stosd((unsigned long*)memory, element, count);
+ #elif defined(__GNUC__) && defined(__x86__) && !defined(MEMORY_SANITIZER)
+ __asm__("rep stosl" : : "D"(memory), "a"(element), "c"(count));
+ #else
+ for(size_t i = 0; i < count; i++)
+ {
+ memory[i] = element;
+ }
+ #endif
+}
+}
