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There are two methods in SectionRef that can fail: * getName: The index into the string table can be invalid. * getContents: The section might point to invalid contents. Every other method will always succeed and returning and std::error_code just complicates the code. For example, a section can have an invalid alignment, but if we are able to get to the section structure at all and create a SectionRef, we will always be able to read that invalid alignment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219314 91177308-0d34-0410-b5e6-96231b3b80d8
245 lines
7.2 KiB
C++
245 lines
7.2 KiB
C++
//===- Object.cpp - C bindings to the object file library--------*- 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 defines the C bindings to the file-format-independent object
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// library.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/SmallVector.h"
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#include "llvm-c/Object.h"
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#include "llvm/Object/ObjectFile.h"
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using namespace llvm;
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using namespace object;
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inline OwningBinary<ObjectFile> *unwrap(LLVMObjectFileRef OF) {
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return reinterpret_cast<OwningBinary<ObjectFile> *>(OF);
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}
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inline LLVMObjectFileRef wrap(const OwningBinary<ObjectFile> *OF) {
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return reinterpret_cast<LLVMObjectFileRef>(
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const_cast<OwningBinary<ObjectFile> *>(OF));
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}
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inline section_iterator *unwrap(LLVMSectionIteratorRef SI) {
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return reinterpret_cast<section_iterator*>(SI);
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}
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inline LLVMSectionIteratorRef
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wrap(const section_iterator *SI) {
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return reinterpret_cast<LLVMSectionIteratorRef>
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(const_cast<section_iterator*>(SI));
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}
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inline symbol_iterator *unwrap(LLVMSymbolIteratorRef SI) {
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return reinterpret_cast<symbol_iterator*>(SI);
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}
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inline LLVMSymbolIteratorRef
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wrap(const symbol_iterator *SI) {
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return reinterpret_cast<LLVMSymbolIteratorRef>
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(const_cast<symbol_iterator*>(SI));
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}
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inline relocation_iterator *unwrap(LLVMRelocationIteratorRef SI) {
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return reinterpret_cast<relocation_iterator*>(SI);
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}
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inline LLVMRelocationIteratorRef
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wrap(const relocation_iterator *SI) {
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return reinterpret_cast<LLVMRelocationIteratorRef>
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(const_cast<relocation_iterator*>(SI));
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}
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// ObjectFile creation
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LLVMObjectFileRef LLVMCreateObjectFile(LLVMMemoryBufferRef MemBuf) {
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std::unique_ptr<MemoryBuffer> Buf(unwrap(MemBuf));
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ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr(
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ObjectFile::createObjectFile(Buf->getMemBufferRef()));
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std::unique_ptr<ObjectFile> Obj;
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if (!ObjOrErr)
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return nullptr;
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auto *Ret = new OwningBinary<ObjectFile>(std::move(ObjOrErr.get()), std::move(Buf));
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return wrap(Ret);
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}
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void LLVMDisposeObjectFile(LLVMObjectFileRef ObjectFile) {
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delete unwrap(ObjectFile);
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}
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// ObjectFile Section iterators
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LLVMSectionIteratorRef LLVMGetSections(LLVMObjectFileRef OF) {
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OwningBinary<ObjectFile> *OB = unwrap(OF);
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section_iterator SI = OB->getBinary()->section_begin();
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return wrap(new section_iterator(SI));
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}
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void LLVMDisposeSectionIterator(LLVMSectionIteratorRef SI) {
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delete unwrap(SI);
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}
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LLVMBool LLVMIsSectionIteratorAtEnd(LLVMObjectFileRef OF,
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LLVMSectionIteratorRef SI) {
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OwningBinary<ObjectFile> *OB = unwrap(OF);
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return (*unwrap(SI) == OB->getBinary()->section_end()) ? 1 : 0;
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}
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void LLVMMoveToNextSection(LLVMSectionIteratorRef SI) {
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++(*unwrap(SI));
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}
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void LLVMMoveToContainingSection(LLVMSectionIteratorRef Sect,
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LLVMSymbolIteratorRef Sym) {
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if (std::error_code ec = (*unwrap(Sym))->getSection(*unwrap(Sect)))
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report_fatal_error(ec.message());
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}
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// ObjectFile Symbol iterators
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LLVMSymbolIteratorRef LLVMGetSymbols(LLVMObjectFileRef OF) {
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OwningBinary<ObjectFile> *OB = unwrap(OF);
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symbol_iterator SI = OB->getBinary()->symbol_begin();
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return wrap(new symbol_iterator(SI));
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}
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void LLVMDisposeSymbolIterator(LLVMSymbolIteratorRef SI) {
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delete unwrap(SI);
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}
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LLVMBool LLVMIsSymbolIteratorAtEnd(LLVMObjectFileRef OF,
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LLVMSymbolIteratorRef SI) {
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OwningBinary<ObjectFile> *OB = unwrap(OF);
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return (*unwrap(SI) == OB->getBinary()->symbol_end()) ? 1 : 0;
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}
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void LLVMMoveToNextSymbol(LLVMSymbolIteratorRef SI) {
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++(*unwrap(SI));
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}
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// SectionRef accessors
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const char *LLVMGetSectionName(LLVMSectionIteratorRef SI) {
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StringRef ret;
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if (std::error_code ec = (*unwrap(SI))->getName(ret))
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report_fatal_error(ec.message());
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return ret.data();
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}
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uint64_t LLVMGetSectionSize(LLVMSectionIteratorRef SI) {
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return (*unwrap(SI))->getSize();
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}
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const char *LLVMGetSectionContents(LLVMSectionIteratorRef SI) {
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StringRef ret;
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if (std::error_code ec = (*unwrap(SI))->getContents(ret))
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report_fatal_error(ec.message());
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return ret.data();
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}
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uint64_t LLVMGetSectionAddress(LLVMSectionIteratorRef SI) {
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return (*unwrap(SI))->getAddress();
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}
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LLVMBool LLVMGetSectionContainsSymbol(LLVMSectionIteratorRef SI,
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LLVMSymbolIteratorRef Sym) {
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return (*unwrap(SI))->containsSymbol(**unwrap(Sym));
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}
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// Section Relocation iterators
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LLVMRelocationIteratorRef LLVMGetRelocations(LLVMSectionIteratorRef Section) {
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relocation_iterator SI = (*unwrap(Section))->relocation_begin();
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return wrap(new relocation_iterator(SI));
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}
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void LLVMDisposeRelocationIterator(LLVMRelocationIteratorRef SI) {
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delete unwrap(SI);
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}
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LLVMBool LLVMIsRelocationIteratorAtEnd(LLVMSectionIteratorRef Section,
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LLVMRelocationIteratorRef SI) {
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return (*unwrap(SI) == (*unwrap(Section))->relocation_end()) ? 1 : 0;
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}
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void LLVMMoveToNextRelocation(LLVMRelocationIteratorRef SI) {
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++(*unwrap(SI));
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}
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// SymbolRef accessors
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const char *LLVMGetSymbolName(LLVMSymbolIteratorRef SI) {
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StringRef ret;
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if (std::error_code ec = (*unwrap(SI))->getName(ret))
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report_fatal_error(ec.message());
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return ret.data();
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}
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uint64_t LLVMGetSymbolAddress(LLVMSymbolIteratorRef SI) {
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uint64_t ret;
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if (std::error_code ec = (*unwrap(SI))->getAddress(ret))
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report_fatal_error(ec.message());
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return ret;
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}
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uint64_t LLVMGetSymbolSize(LLVMSymbolIteratorRef SI) {
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uint64_t ret;
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if (std::error_code ec = (*unwrap(SI))->getSize(ret))
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report_fatal_error(ec.message());
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return ret;
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}
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// RelocationRef accessors
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uint64_t LLVMGetRelocationAddress(LLVMRelocationIteratorRef RI) {
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uint64_t ret;
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if (std::error_code ec = (*unwrap(RI))->getAddress(ret))
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report_fatal_error(ec.message());
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return ret;
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}
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uint64_t LLVMGetRelocationOffset(LLVMRelocationIteratorRef RI) {
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uint64_t ret;
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if (std::error_code ec = (*unwrap(RI))->getOffset(ret))
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report_fatal_error(ec.message());
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return ret;
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}
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LLVMSymbolIteratorRef LLVMGetRelocationSymbol(LLVMRelocationIteratorRef RI) {
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symbol_iterator ret = (*unwrap(RI))->getSymbol();
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return wrap(new symbol_iterator(ret));
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}
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uint64_t LLVMGetRelocationType(LLVMRelocationIteratorRef RI) {
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uint64_t ret;
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if (std::error_code ec = (*unwrap(RI))->getType(ret))
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report_fatal_error(ec.message());
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return ret;
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}
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// NOTE: Caller takes ownership of returned string.
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const char *LLVMGetRelocationTypeName(LLVMRelocationIteratorRef RI) {
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SmallVector<char, 0> ret;
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if (std::error_code ec = (*unwrap(RI))->getTypeName(ret))
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report_fatal_error(ec.message());
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char *str = static_cast<char*>(malloc(ret.size()));
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std::copy(ret.begin(), ret.end(), str);
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return str;
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}
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// NOTE: Caller takes ownership of returned string.
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const char *LLVMGetRelocationValueString(LLVMRelocationIteratorRef RI) {
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SmallVector<char, 0> ret;
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if (std::error_code ec = (*unwrap(RI))->getValueString(ret))
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report_fatal_error(ec.message());
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char *str = static_cast<char*>(malloc(ret.size()));
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std::copy(ret.begin(), ret.end(), str);
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return str;
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}
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