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To make repeated symbolication requests faster, we now cache the symbol count on ELFLoader instead of looking it up in the image each time. We also cache the demangled versions of names after looking them up the first time. This is a huge speedup for ProfileViewer. :^)
95 lines
3 KiB
C++
95 lines
3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Function.h>
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#include <AK/HashMap.h>
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#include <AK/OwnPtr.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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#include <LibELF/ELFImage.h>
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#ifdef KERNEL
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# include <LibBareMetal/Memory/VirtualAddress.h>
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namespace Kernel {
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class Region;
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}
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#endif
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class ELFLoader {
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public:
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explicit ELFLoader(const u8*, size_t);
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~ELFLoader();
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bool load();
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#if defined(KERNEL)
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Function<void*(VirtualAddress, size_t, size_t, bool, bool, const String&)> alloc_section_hook;
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Function<void*(size_t, size_t)> tls_section_hook;
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Function<void*(VirtualAddress, size_t, size_t, size_t, bool r, bool w, bool x, const String&)> map_section_hook;
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VirtualAddress entry() const { return m_image.entry(); }
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#endif
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char* symbol_ptr(const char* name);
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bool has_symbols() const { return m_symbol_count; }
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String symbolicate(u32 address, u32* offset = nullptr) const;
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private:
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bool layout();
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bool perform_relocations();
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void* lookup(const ELFImage::Symbol&);
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char* area_for_section(const ELFImage::Section&);
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char* area_for_section_name(const char*);
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struct PtrAndSize {
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PtrAndSize() {}
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PtrAndSize(char* p, unsigned s)
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: ptr(p)
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, size(s)
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{
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}
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char* ptr { nullptr };
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unsigned size { 0 };
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};
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ELFImage m_image;
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size_t m_symbol_count { 0 };
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struct SortedSymbol {
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u32 address;
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StringView name;
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#ifndef KERNEL
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String demangled_name;
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#endif
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};
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#ifdef KERNEL
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mutable OwnPtr<Kernel::Region> m_sorted_symbols_region;
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#else
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mutable Vector<SortedSymbol> m_sorted_symbols;
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#endif
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};
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