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e1fe0cc030
Allows fast iteration of C++ changes without restarting the application. To use, select the "Live Coding (Experimental)" mode from the drop down menu next to the editor's compile button, or type "LiveCoding" into the console for a monolithic build. Press Ctrl+Alt+F11 to find changes and compile.
Changes vs standalone Live++ version:
* UBT is used to execute builds. This allows standard UE4 adaptive unity mode, allows us to reuse object files when we do regular builds, supports using any build executor allowed by UBT (XGE, SNDBS, etc..).
* Adding new source files is supported.
* Custom visualizer for FNames is supported via a weakly linked symbol in a static library (Engine/Extras/NatvisHelpers).
* Settings are exposed in the editor's project settings dialog.
* Standalone application has been rewritten as a Slate app ("LiveCodingConsole"). There is an additional option to start the program as hidden, where it will not be visible until Ctrl+Alt+F11 is hit. Similarly, closing the window will hide it instead of closing the application.
* Does not require a standalone licensed version of Live++.
Known issues:
* Does not currently support class layout changes / object reinstancing
#rb none
#fyi Marc.Audy, Stefan.Boberg, Nick.Penwarden
#jira
[CL 5304722 by Ben Marsh in 4.22 branch]
119 lines
2.8 KiB
C++
119 lines
2.8 KiB
C++
// Copyright 2011-2019 Molecular Matters GmbH, all rights reserved.
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#pragma once
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#include "CoreTypes.h"
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#include "LC_PointerUtil.h"
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#include "LC_MemoryFile.h"
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#include "xxhash.h"
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#include <vector>
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#include "Windows/WindowsHWrapper.h"
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namespace executable
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{
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#if LC_64_BIT
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typedef uint64_t PreferredBase;
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#else
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typedef uint32_t PreferredBase;
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#endif
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struct Header
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{
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IMAGE_FILE_HEADER imageHeader;
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uint64_t size;
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};
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typedef file::MemoryFile Image;
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struct ImageSection
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{
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uint32_t rva;
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uint32_t size;
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uint32_t rawDataRva;
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uint32_t rawDataSize;
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};
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struct ImageSectionDB
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{
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std::vector<ImageSection> sections;
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};
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Image* OpenImage(const wchar_t* filename, file::OpenMode::Enum openMode);
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void CloseImage(Image*& image);
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void RebaseImage(Image* image, PreferredBase preferredBase);
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ImageSectionDB* GatherSections(const Image* image);
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void DestroyImageSectionDB(ImageSectionDB* database);
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// returns the RVA of the entry point of the image when loaded into memory
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uint32_t GetEntryPointRva(const Image* image);
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// returns the preferred address at which the image is to be loaded into memory
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PreferredBase GetPreferredBase(const Image* image);
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// returns the image's header
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Header GetHeader(const Image* image);
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// checks whether a header is valid
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bool IsValidHeader(const Header& header);
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// returns the size of the image when loaded into memory
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uint32_t GetSize(const Image* image);
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// helper functions
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uint32_t RvaToFileOffset(const ImageSectionDB* database, uint32_t rva);
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void ReadFromFileOffset(const Image* file, uint32_t offset, void* destination, size_t byteCount);
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void WriteToFileOffset(Image* file, uint32_t offset, const void* source, size_t byteCount);
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// helper function to directly read from an RVA in the given image
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template <typename T>
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inline T ReadFromImage(const Image* image, const ImageSectionDB* database, uint32_t rva)
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{
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const uint32_t fileOffset = RvaToFileOffset(database, rva);
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if (fileOffset == 0u)
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{
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// don't try to read from sections without data in the image, e.g. .bss
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return T(0);
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}
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const T* address = pointer::Offset<const T*>(image->base, fileOffset);
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return *address;
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}
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void CallDllEntryPoint(void* moduleBase, uint32_t entryPointRva);
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}
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// specializations to allow executable::Header to be used as key in maps and sets
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namespace std
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{
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template <>
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struct hash<executable::Header>
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{
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inline std::size_t operator()(const executable::Header& header) const
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{
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return static_cast<uint32_t>(XXH32(&header.imageHeader, sizeof(executable::Header::imageHeader), 0u));
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}
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};
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template <>
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struct equal_to<executable::Header>
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{
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inline bool operator()(const executable::Header& lhs, const executable::Header& rhs) const
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{
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if (lhs.size != rhs.size)
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return false;
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return (::memcmp(&lhs.imageHeader, &rhs.imageHeader, sizeof(executable::Header::imageHeader)) == 0);
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}
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};
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}
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