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7acaefabf6
Previously, when loading an object file, RuntimeDyld (1) took ownership of the ObjectFile instance (and associated MemoryBuffer), (2) potentially modified the object in-place, and (3) returned an ObjectImage that managed ownership of the now-modified object and provided some convenience methods. This scheme accreted over several years as features were tacked on to RuntimeDyld, and was both unintuitive and unsafe (See e.g. http://llvm.org/PR20722). This patch fixes the issue by removing all ownership and in-place modification of object files from RuntimeDyld. Existing behavior, including debugger registration, is preserved. Noteworthy changes include: (1) ObjectFile instances are now passed to RuntimeDyld by const-ref. (2) The ObjectImage and ObjectBuffer classes have been removed entirely, they existed to model ownership within RuntimeDyld, and so are no longer needed. (3) RuntimeDyld::loadObject now returns an instance of a new class, RuntimeDyld::LoadedObjectInfo, which can be used to construct a modified object suitable for registration with the debugger, following the existing debugger registration scheme. (4) The JITRegistrar class has been removed, and the GDBRegistrar class has been re-written as a JITEventListener. This should fix http://llvm.org/PR20722 . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222810 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
//===--- ObjectBuffer.h - Utility class to wrap object memory ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares a wrapper class to hold the memory into which an
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// object will be generated.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_OBJECTBUFFER_H
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#define LLVM_EXECUTIONENGINE_OBJECTBUFFER_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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namespace llvm {
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class ObjectMemoryBuffer : public MemoryBuffer {
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public:
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template <unsigned N>
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ObjectMemoryBuffer(SmallVector<char, N> SV)
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: SV(SV), BufferName("<in-memory object>") {
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init(this->SV.begin(), this->SV.end(), false);
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}
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template <unsigned N>
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ObjectMemoryBuffer(SmallVector<char, N> SV, StringRef Name)
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: SV(SV), BufferName(Name) {
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init(this->SV.begin(), this->SV.end(), false);
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}
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const char* getBufferIdentifier() const override { return BufferName.c_str(); }
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BufferKind getBufferKind() const override { return MemoryBuffer_Malloc; }
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private:
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SmallVector<char, 4096> SV;
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std::string BufferName;
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};
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} // namespace llvm
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#endif
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