llvm16 targets

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diff --git a/contrib/libs/llvm16/include/llvm/ExecutionEngine/SectionMemoryManager.h b/contrib/libs/llvm16/include/llvm/ExecutionEngine/SectionMemoryManager.h
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+++ b/contrib/libs/llvm16/include/llvm/ExecutionEngine/SectionMemoryManager.h
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+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- SectionMemoryManager.h - Memory manager for MCJIT/RtDyld -*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the declaration of a section-based memory manager used by
+// the MCJIT execution engine and RuntimeDyld.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_SECTIONMEMORYMANAGER_H
+#define LLVM_EXECUTIONENGINE_SECTIONMEMORYMANAGER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
+#include "llvm/Support/Memory.h"
+#include <cstdint>
+#include <string>
+#include <system_error>
+
+namespace llvm {
+
+/// This is a simple memory manager which implements the methods called by
+/// the RuntimeDyld class to allocate memory for section-based loading of
+/// objects, usually those generated by the MCJIT execution engine.
+///
+/// This memory manager allocates all section memory as read-write.  The
+/// RuntimeDyld will copy JITed section memory into these allocated blocks
+/// and perform any necessary linking and relocations.
+///
+/// Any client using this memory manager MUST ensure that section-specific
+/// page permissions have been applied before attempting to execute functions
+/// in the JITed object.  Permissions can be applied either by calling
+/// MCJIT::finalizeObject or by calling SectionMemoryManager::finalizeMemory
+/// directly.  Clients of MCJIT should call MCJIT::finalizeObject.
+class SectionMemoryManager : public RTDyldMemoryManager {
+public:
+  /// This enum describes the various reasons to allocate pages from
+  /// allocateMappedMemory.
+  enum class AllocationPurpose {
+    Code,
+    ROData,
+    RWData,
+  };
+
+  /// Implementations of this interface are used by SectionMemoryManager to
+  /// request pages from the operating system.
+  class MemoryMapper {
+  public:
+    /// This method attempts to allocate \p NumBytes bytes of virtual memory for
+    /// \p Purpose.  \p NearBlock may point to an existing allocation, in which
+    /// case an attempt is made to allocate more memory near the existing block.
+    /// The actual allocated address is not guaranteed to be near the requested
+    /// address.  \p Flags is used to set the initial protection flags for the
+    /// block of the memory.  \p EC [out] returns an object describing any error
+    /// that occurs.
+    ///
+    /// This method may allocate more than the number of bytes requested.  The
+    /// actual number of bytes allocated is indicated in the returned
+    /// MemoryBlock.
+    ///
+    /// The start of the allocated block must be aligned with the system
+    /// allocation granularity (64K on Windows, page size on Linux).  If the
+    /// address following \p NearBlock is not so aligned, it will be rounded up
+    /// to the next allocation granularity boundary.
+    ///
+    /// \r a non-null MemoryBlock if the function was successful, otherwise a
+    /// null MemoryBlock with \p EC describing the error.
+    virtual sys::MemoryBlock
+    allocateMappedMemory(AllocationPurpose Purpose, size_t NumBytes,
+                         const sys::MemoryBlock *const NearBlock,
+                         unsigned Flags, std::error_code &EC) = 0;
+
+    /// This method sets the protection flags for a block of memory to the state
+    /// specified by \p Flags.  The behavior is not specified if the memory was
+    /// not allocated using the allocateMappedMemory method.
+    /// \p Block describes the memory block to be protected.
+    /// \p Flags specifies the new protection state to be assigned to the block.
+    ///
+    /// If \p Flags is MF_WRITE, the actual behavior varies with the operating
+    /// system (i.e. MF_READ | MF_WRITE on Windows) and the target architecture
+    /// (i.e. MF_WRITE -> MF_READ | MF_WRITE on i386).
+    ///
+    /// \r error_success if the function was successful, or an error_code
+    /// describing the failure if an error occurred.
+    virtual std::error_code protectMappedMemory(const sys::MemoryBlock &Block,
+                                                unsigned Flags) = 0;
+
+    /// This method releases a block of memory that was allocated with the
+    /// allocateMappedMemory method. It should not be used to release any memory
+    /// block allocated any other way.
+    /// \p Block describes the memory to be released.
+    ///
+    /// \r error_success if the function was successful, or an error_code
+    /// describing the failure if an error occurred.
+    virtual std::error_code releaseMappedMemory(sys::MemoryBlock &M) = 0;
+
+    virtual ~MemoryMapper();
+  };
+
+  /// Creates a SectionMemoryManager instance with \p MM as the associated
+  /// memory mapper.  If \p MM is nullptr then a default memory mapper is used
+  /// that directly calls into the operating system.
+  SectionMemoryManager(MemoryMapper *MM = nullptr);
+  SectionMemoryManager(const SectionMemoryManager &) = delete;
+  void operator=(const SectionMemoryManager &) = delete;
+  ~SectionMemoryManager() override;
+
+  /// Allocates a memory block of (at least) the given size suitable for
+  /// executable code.
+  ///
+  /// The value of \p Alignment must be a power of two.  If \p Alignment is zero
+  /// a default alignment of 16 will be used.
+  uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+                               unsigned SectionID,
+                               StringRef SectionName) override;
+
+  /// Allocates a memory block of (at least) the given size suitable for
+  /// executable code.
+  ///
+  /// The value of \p Alignment must be a power of two.  If \p Alignment is zero
+  /// a default alignment of 16 will be used.
+  uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+                               unsigned SectionID, StringRef SectionName,
+                               bool isReadOnly) override;
+
+  /// Update section-specific memory permissions and other attributes.
+  ///
+  /// This method is called when object loading is complete and section page
+  /// permissions can be applied.  It is up to the memory manager implementation
+  /// to decide whether or not to act on this method.  The memory manager will
+  /// typically allocate all sections as read-write and then apply specific
+  /// permissions when this method is called.  Code sections cannot be executed
+  /// until this function has been called.  In addition, any cache coherency
+  /// operations needed to reliably use the memory are also performed.
+  ///
+  /// \returns true if an error occurred, false otherwise.
+  bool finalizeMemory(std::string *ErrMsg = nullptr) override;
+
+  /// Invalidate instruction cache for code sections.
+  ///
+  /// Some platforms with separate data cache and instruction cache require
+  /// explicit cache flush, otherwise JIT code manipulations (like resolved
+  /// relocations) will get to the data cache but not to the instruction cache.
+  ///
+  /// This method is called from finalizeMemory.
+  virtual void invalidateInstructionCache();
+
+private:
+  struct FreeMemBlock {
+    // The actual block of free memory
+    sys::MemoryBlock Free;
+    // If there is a pending allocation from the same reservation right before
+    // this block, store it's index in PendingMem, to be able to update the
+    // pending region if part of this block is allocated, rather than having to
+    // create a new one
+    unsigned PendingPrefixIndex;
+  };
+
+  struct MemoryGroup {
+    // PendingMem contains all blocks of memory (subblocks of AllocatedMem)
+    // which have not yet had their permissions applied, but have been given
+    // out to the user. FreeMem contains all block of memory, which have
+    // neither had their permissions applied, nor been given out to the user.
+    SmallVector<sys::MemoryBlock, 16> PendingMem;
+    SmallVector<FreeMemBlock, 16> FreeMem;
+
+    // All memory blocks that have been requested from the system
+    SmallVector<sys::MemoryBlock, 16> AllocatedMem;
+
+    sys::MemoryBlock Near;
+  };
+
+  uint8_t *allocateSection(AllocationPurpose Purpose, uintptr_t Size,
+                           unsigned Alignment);
+
+  std::error_code applyMemoryGroupPermissions(MemoryGroup &MemGroup,
+                                              unsigned Permissions);
+
+  void anchor() override;
+
+  MemoryGroup CodeMem;
+  MemoryGroup RWDataMem;
+  MemoryGroup RODataMem;
+  MemoryMapper &MMapper;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_EXECUTIONENGINE_SECTIONMEMORYMANAGER_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif