Object: Add proper error handling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133872 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Object/COFFObjectFile.cpp b/lib/Object/COFFObjectFile.cpp
index 60fc880..18aad9a 100644
--- a/lib/Object/COFFObjectFile.cpp
+++ b/lib/Object/COFFObjectFile.cpp
@@ -25,74 +25,165 @@
using support::little16_t;
}
-SymbolRef COFFObjectFile::getSymbolNext(DataRefImpl Symb) const {
- const coff_symbol *symb = reinterpret_cast<const coff_symbol*>(Symb.p);
- symb += 1 + symb->NumberOfAuxSymbols;
- Symb.p = reinterpret_cast<intptr_t>(symb);
- return SymbolRef(Symb, this);
+namespace {
+// Returns false if size is greater than the buffer size. And sets ec.
+bool checkSize(const MemoryBuffer *m, error_code &ec, uint64_t size) {
+ if (m->getBufferSize() < size) {
+ ec = object_error::unexpected_eof;
+ return false;
+ }
+ return true;
}
-StringRef COFFObjectFile::getSymbolName(DataRefImpl Symb) const {
- const coff_symbol *symb = reinterpret_cast<const coff_symbol*>(Symb.p);
+// Returns false if any bytes in [addr, addr + size) fall outsize of m.
+bool checkAddr(const MemoryBuffer *m,
+ error_code &ec,
+ uintptr_t addr,
+ uint64_t size) {
+ if (addr + size < addr ||
+ addr + size < size ||
+ addr + size > uintptr_t(m->getBufferEnd())) {
+ ec = object_error::unexpected_eof;
+ return false;
+ }
+ return true;
+}
+}
+
+const coff_symbol *COFFObjectFile::toSymb(DataRefImpl Symb) const {
+ const coff_symbol *addr = reinterpret_cast<const coff_symbol*>(Symb.p);
+
+# ifndef NDEBUG
+ // Verify that the symbol points to a valid entry in the symbol table.
+ uintptr_t offset = uintptr_t(addr) - uintptr_t(base());
+ if (offset < Header->PointerToSymbolTable
+ || offset >= Header->PointerToSymbolTable
+ + (Header->NumberOfSymbols * sizeof(coff_symbol)))
+ report_fatal_error("Symbol was outside of symbol table.");
+
+ assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol)
+ == 0 && "Symbol did not point to the beginning of a symbol");
+# endif
+
+ return addr;
+}
+
+const coff_section *COFFObjectFile::toSec(DataRefImpl Sec) const {
+ const coff_section *addr = reinterpret_cast<const coff_section*>(Sec.p);
+
+# ifndef NDEBUG
+ // Verify that the section points to a valid entry in the section table.
+ if (addr < SectionTable
+ || addr >= (SectionTable + Header->NumberOfSections))
+ report_fatal_error("Section was outside of section table.");
+
+ uintptr_t offset = uintptr_t(addr) - uintptr_t(SectionTable);
+ assert(offset % sizeof(coff_section) == 0 &&
+ "Section did not point to the beginning of a section");
+# endif
+
+ return addr;
+}
+
+error_code COFFObjectFile::getSymbolNext(DataRefImpl Symb,
+ SymbolRef &Result) const {
+ const coff_symbol *symb = toSymb(Symb);
+ symb += 1 + symb->NumberOfAuxSymbols;
+ Symb.p = reinterpret_cast<uintptr_t>(symb);
+ Result = SymbolRef(Symb, this);
+ return object_error::success;
+}
+
+ error_code COFFObjectFile::getSymbolName(DataRefImpl Symb,
+ StringRef &Result) const {
+ const coff_symbol *symb = toSymb(Symb);
// Check for string table entry. First 4 bytes are 0.
if (symb->Name.Offset.Zeroes == 0) {
uint32_t Offset = symb->Name.Offset.Offset;
- return StringRef(getString(Offset));
+ if (error_code ec = getString(Offset, Result))
+ return ec;
+ return object_error::success;
}
if (symb->Name.ShortName[7] == 0)
// Null terminated, let ::strlen figure out the length.
- return StringRef(symb->Name.ShortName);
- // Not null terminated, use all 8 bytes.
- return StringRef(symb->Name.ShortName, 8);
+ Result = StringRef(symb->Name.ShortName);
+ else
+ // Not null terminated, use all 8 bytes.
+ Result = StringRef(symb->Name.ShortName, 8);
+ return object_error::success;
}
-uint64_t COFFObjectFile::getSymbolAddress(DataRefImpl Symb) const {
- const coff_symbol *symb = reinterpret_cast<const coff_symbol*>(Symb.p);
- const coff_section *Section = getSection(symb->SectionNumber);
- char Type = getSymbolNMTypeChar(Symb);
+error_code COFFObjectFile::getSymbolAddress(DataRefImpl Symb,
+ uint64_t &Result) const {
+ const coff_symbol *symb = toSymb(Symb);
+ const coff_section *Section;
+ if (error_code ec = getSection(symb->SectionNumber, Section))
+ return ec;
+ char Type;
+ if (error_code ec = getSymbolNMTypeChar(Symb, Type))
+ return ec;
if (Type == 'U' || Type == 'w')
- return UnknownAddressOrSize;
- if (Section)
- return Section->VirtualAddress + symb->Value;
- return symb->Value;
+ Result = UnknownAddressOrSize;
+ else if (Section)
+ Result = Section->VirtualAddress + symb->Value;
+ else
+ Result = symb->Value;
+ return object_error::success;
}
-uint64_t COFFObjectFile::getSymbolSize(DataRefImpl Symb) const {
+error_code COFFObjectFile::getSymbolSize(DataRefImpl Symb,
+ uint64_t &Result) const {
// FIXME: Return the correct size. This requires looking at all the symbols
// in the same section as this symbol, and looking for either the next
// symbol, or the end of the section.
- const coff_symbol *symb = reinterpret_cast<const coff_symbol*>(Symb.p);
- const coff_section *Section = getSection(symb->SectionNumber);
- char Type = getSymbolNMTypeChar(Symb);
+ const coff_symbol *symb = toSymb(Symb);
+ const coff_section *Section;
+ if (error_code ec = getSection(symb->SectionNumber, Section))
+ return ec;
+ char Type;
+ if (error_code ec = getSymbolNMTypeChar(Symb, Type))
+ return ec;
if (Type == 'U' || Type == 'w')
- return UnknownAddressOrSize;
- if (Section)
- return Section->SizeOfRawData - symb->Value;
- return 0;
+ Result = UnknownAddressOrSize;
+ else if (Section)
+ Result = Section->SizeOfRawData - symb->Value;
+ else
+ Result = 0;
+ return object_error::success;
}
-char COFFObjectFile::getSymbolNMTypeChar(DataRefImpl Symb) const {
- const coff_symbol *symb = reinterpret_cast<const coff_symbol*>(Symb.p);
- char ret = StringSwitch<char>(getSymbolName(Symb))
+error_code COFFObjectFile::getSymbolNMTypeChar(DataRefImpl Symb,
+ char &Result) const {
+ const coff_symbol *symb = toSymb(Symb);
+ StringRef name;
+ if (error_code ec = getSymbolName(Symb, name))
+ return ec;
+ char ret = StringSwitch<char>(name)
.StartsWith(".debug", 'N')
.StartsWith(".sxdata", 'N')
.Default('?');
- if (ret != '?')
- return ret;
+ if (ret != '?') {
+ Result = ret;
+ return object_error::success;
+ }
uint32_t Characteristics = 0;
- if (const coff_section *Section = getSection(symb->SectionNumber)) {
+ if (symb->SectionNumber > 0) {
+ const coff_section *Section;
+ if (error_code ec = getSection(symb->SectionNumber, Section))
+ return ec;
Characteristics = Section->Characteristics;
}
switch (symb->SectionNumber) {
case COFF::IMAGE_SYM_UNDEFINED:
// Check storage classes.
- if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL)
- return 'w'; // Don't do ::toupper.
- else
+ if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) {
+ Result = 'w';
+ return object_error::success; // Don't do ::toupper.
+ } else
ret = 'u';
break;
case COFF::IMAGE_SYM_ABSOLUTE:
@@ -124,22 +215,28 @@
if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL)
ret = ::toupper(ret);
- return ret;
+ Result = ret;
+ return object_error::success;
}
-bool COFFObjectFile::isSymbolInternal(DataRefImpl Symb) const {
- return false;
+error_code COFFObjectFile::isSymbolInternal(DataRefImpl Symb,
+ bool &Result) const {
+ Result = false;
+ return object_error::success;
}
-SectionRef COFFObjectFile::getSectionNext(DataRefImpl Sec) const {
- const coff_section *sec = reinterpret_cast<const coff_section*>(Sec.p);
+error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
+ SectionRef &Result) const {
+ const coff_section *sec = toSec(Sec);
sec += 1;
- Sec.p = reinterpret_cast<intptr_t>(sec);
- return SectionRef(Sec, this);
+ Sec.p = reinterpret_cast<uintptr_t>(sec);
+ Result = SectionRef(Sec, this);
+ return object_error::success;
}
-StringRef COFFObjectFile::getSectionName(DataRefImpl Sec) const {
- const coff_section *sec = reinterpret_cast<const coff_section*>(Sec.p);
+error_code COFFObjectFile::getSectionName(DataRefImpl Sec,
+ StringRef &Result) const {
+ const coff_section *sec = toSec(Sec);
StringRef name;
if (sec->Name[7] == 0)
// Null terminated, let ::strlen figure out the length.
@@ -152,66 +249,117 @@
if (name[0] == '/') {
uint32_t Offset;
name.substr(1).getAsInteger(10, Offset);
- return StringRef(getString(Offset));
+ if (error_code ec = getString(Offset, name))
+ return ec;
}
- // It's just a normal name.
- return name;
+ Result = name;
+ return object_error::success;
}
-uint64_t COFFObjectFile::getSectionAddress(DataRefImpl Sec) const {
- const coff_section *sec = reinterpret_cast<const coff_section*>(Sec.p);
- return sec->VirtualAddress;
+error_code COFFObjectFile::getSectionAddress(DataRefImpl Sec,
+ uint64_t &Result) const {
+ const coff_section *sec = toSec(Sec);
+ Result = sec->VirtualAddress;
+ return object_error::success;
}
-uint64_t COFFObjectFile::getSectionSize(DataRefImpl Sec) const {
- const coff_section *sec = reinterpret_cast<const coff_section*>(Sec.p);
- return sec->SizeOfRawData;
+error_code COFFObjectFile::getSectionSize(DataRefImpl Sec,
+ uint64_t &Result) const {
+ const coff_section *sec = toSec(Sec);
+ Result = sec->SizeOfRawData;
+ return object_error::success;
}
-StringRef COFFObjectFile::getSectionContents(DataRefImpl Sec) const {
- const coff_section *sec = reinterpret_cast<const coff_section*>(Sec.p);
- return StringRef(reinterpret_cast<const char *>(base()
- + sec->PointerToRawData),
- sec->SizeOfRawData);
+error_code COFFObjectFile::getSectionContents(DataRefImpl Sec,
+ StringRef &Result) const {
+ const coff_section *sec = toSec(Sec);
+ // The only thing that we need to verify is that the contents is contained
+ // within the file bounds. We don't need to make sure it doesn't cover other
+ // data, as there's nothing that says that is not allowed.
+ uintptr_t con_start = uintptr_t(base()) + sec->PointerToRawData;
+ uintptr_t con_end = con_start + sec->SizeOfRawData;
+ if (con_end >= uintptr_t(Data->getBufferEnd()))
+ return object_error::parse_failed;
+ Result = StringRef(reinterpret_cast<const char*>(con_start),
+ sec->SizeOfRawData);
+ return object_error::success;
}
-bool COFFObjectFile::isSectionText(DataRefImpl Sec) const {
- const coff_section *sec = reinterpret_cast<const coff_section*>(Sec.p);
- return sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
+error_code COFFObjectFile::isSectionText(DataRefImpl Sec,
+ bool &Result) const {
+ const coff_section *sec = toSec(Sec);
+ Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
+ return object_error::success;
}
COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
: ObjectFile(Binary::isCOFF, Object, ec) {
+ // Check that we at least have enough room for a header.
+ if (!checkSize(Data, ec, sizeof(coff_file_header))) return;
- HeaderOff = 0;
+ // The actual starting location of the COFF header in the file. This can be
+ // non-zero in PE/COFF files.
+ uint64_t HeaderStart = 0;
+ // Check if this is a PE/COFF file.
if (base()[0] == 0x4d && base()[1] == 0x5a) {
// PE/COFF, seek through MS-DOS compatibility stub and 4-byte
// PE signature to find 'normal' COFF header.
- HeaderOff += *reinterpret_cast<const ulittle32_t *>(base() + 0x3c);
- HeaderOff += 4;
+ if (!checkSize(Data, ec, 0x3c + 8)) return;
+ HeaderStart += *reinterpret_cast<const ulittle32_t *>(base() + 0x3c);
+ // Check the PE header. ("PE\0\0")
+ if (StringRef(reinterpret_cast<const char *>(base() + HeaderStart), 4)
+ != "PE\0\0") {
+ ec = object_error::parse_failed;
+ return;
+ }
+ HeaderStart += 4; // Skip the PE Header.
}
- Header = reinterpret_cast<const coff_file_header *>(base() + HeaderOff);
+ Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
+ if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
+ return;
+
SectionTable =
reinterpret_cast<const coff_section *>( base()
- + HeaderOff
+ + HeaderStart
+ sizeof(coff_file_header)
+ Header->SizeOfOptionalHeader);
+ if (!checkAddr(Data, ec, uintptr_t(SectionTable),
+ Header->NumberOfSections * sizeof(coff_section)))
+ return;
+
SymbolTable =
reinterpret_cast<const coff_symbol *>(base()
- + Header->PointerToSymbolTable);
+ + Header->PointerToSymbolTable);
+ if (!checkAddr(Data, ec, uintptr_t(SymbolTable),
+ Header->NumberOfSymbols * sizeof(coff_symbol)))
+ return;
// Find string table.
StringTable = reinterpret_cast<const char *>(base())
- + Header->PointerToSymbolTable
- + Header->NumberOfSymbols * 18;
+ + Header->PointerToSymbolTable
+ + Header->NumberOfSymbols * sizeof(coff_symbol);
+ if (!checkAddr(Data, ec, uintptr_t(StringTable), sizeof(ulittle32_t)))
+ return;
+
+ StringTableSize = *reinterpret_cast<const ulittle32_t *>(StringTable);
+ if (!checkAddr(Data, ec, uintptr_t(StringTable), StringTableSize))
+ return;
+ // Check that the string table is null terminated if has any in it.
+ if (StringTableSize < 4
+ || (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)) {
+ ec = object_error::parse_failed;
+ return;
+ }
+
+ ec = object_error::success;
}
ObjectFile::symbol_iterator COFFObjectFile::begin_symbols() const {
DataRefImpl ret;
- memset(&ret, 0, sizeof(DataRefImpl));
+ std::memset(&ret, 0, sizeof(DataRefImpl));
ret.p = reinterpret_cast<intptr_t>(SymbolTable);
return symbol_iterator(SymbolRef(ret, this));
}
@@ -219,21 +367,21 @@
ObjectFile::symbol_iterator COFFObjectFile::end_symbols() const {
// The symbol table ends where the string table begins.
DataRefImpl ret;
- memset(&ret, 0, sizeof(DataRefImpl));
+ std::memset(&ret, 0, sizeof(DataRefImpl));
ret.p = reinterpret_cast<intptr_t>(StringTable);
return symbol_iterator(SymbolRef(ret, this));
}
ObjectFile::section_iterator COFFObjectFile::begin_sections() const {
DataRefImpl ret;
- memset(&ret, 0, sizeof(DataRefImpl));
+ std::memset(&ret, 0, sizeof(DataRefImpl));
ret.p = reinterpret_cast<intptr_t>(SectionTable);
return section_iterator(SectionRef(ret, this));
}
ObjectFile::section_iterator COFFObjectFile::end_sections() const {
DataRefImpl ret;
- memset(&ret, 0, sizeof(DataRefImpl));
+ std::memset(&ret, 0, sizeof(DataRefImpl));
ret.p = reinterpret_cast<intptr_t>(SectionTable + Header->NumberOfSections);
return section_iterator(SectionRef(ret, this));
}
@@ -264,18 +412,30 @@
}
}
-const coff_section *COFFObjectFile::getSection(std::size_t index) const {
- if (index > 0 && index <= Header->NumberOfSections)
- return SectionTable + (index - 1);
- return 0;
+error_code COFFObjectFile::getSection(int32_t index,
+ const coff_section *&Result) const {
+ // Check for special index values.
+ if (index == COFF::IMAGE_SYM_UNDEFINED ||
+ index == COFF::IMAGE_SYM_ABSOLUTE ||
+ index == COFF::IMAGE_SYM_DEBUG)
+ Result = NULL;
+ else if (index > 0 && index <= Header->NumberOfSections)
+ // We already verified the section table data, so no need to check again.
+ Result = SectionTable + (index - 1);
+ else
+ return object_error::parse_failed;
+ return object_error::success;
}
-const char *COFFObjectFile::getString(std::size_t offset) const {
- const ulittle32_t *StringTableSize =
- reinterpret_cast<const ulittle32_t *>(StringTable);
- if (offset < *StringTableSize)
- return StringTable + offset;
- return 0;
+error_code COFFObjectFile::getString(uint32_t offset,
+ StringRef &Result) const {
+ if (StringTableSize <= 4)
+ // Tried to get a string from an empty string table.
+ return object_error::parse_failed;
+ if (offset >= StringTableSize)
+ return object_error::unexpected_eof;
+ Result = StringRef(StringTable + offset);
+ return object_error::success;
}
namespace llvm {
diff --git a/lib/Object/ELFObjectFile.cpp b/lib/Object/ELFObjectFile.cpp
index 1c4dcea..edf9824 100644
--- a/lib/Object/ELFObjectFile.cpp
+++ b/lib/Object/ELFObjectFile.cpp
@@ -222,19 +222,19 @@
const char *getString(const Elf_Shdr *section, uint32_t offset) const;
protected:
- virtual SymbolRef getSymbolNext(DataRefImpl Symb) const;
- virtual StringRef getSymbolName(DataRefImpl Symb) const;
- virtual uint64_t getSymbolAddress(DataRefImpl Symb) const;
- virtual uint64_t getSymbolSize(DataRefImpl Symb) const;
- virtual char getSymbolNMTypeChar(DataRefImpl Symb) const;
- virtual bool isSymbolInternal(DataRefImpl Symb) const;
+ virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
+ virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
+ virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
+ virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
+ virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
+ virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const;
- virtual SectionRef getSectionNext(DataRefImpl Sec) const;
- virtual StringRef getSectionName(DataRefImpl Sec) const;
- virtual uint64_t getSectionAddress(DataRefImpl Sec) const;
- virtual uint64_t getSectionSize(DataRefImpl Sec) const;
- virtual StringRef getSectionContents(DataRefImpl Sec) const;
- virtual bool isSectionText(DataRefImpl Sec) const;
+ virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
+ virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
+ virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
+ virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
+ virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
+ virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
public:
ELFObjectFile(MemoryBuffer *Object, error_code &ec);
@@ -269,8 +269,9 @@
}
template<support::endianness target_endianness, bool is64Bits>
-SymbolRef ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolNext(DataRefImpl Symb) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSymbolNext(DataRefImpl Symb,
+ SymbolRef &Result) const {
validateSymbol(Symb);
const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
@@ -287,63 +288,80 @@
}
}
- return SymbolRef(Symb, this);
+ Result = SymbolRef(Symb, this);
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-StringRef ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolName(DataRefImpl Symb) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSymbolName(DataRefImpl Symb,
+ StringRef &Result) const {
validateSymbol(Symb);
const Elf_Sym *symb = getSymbol(Symb);
if (symb->st_name == 0) {
const Elf_Shdr *section = getSection(symb->st_shndx);
if (!section)
- return "";
- return getString(dot_shstrtab_sec, section->sh_name);
+ Result = "";
+ else
+ Result = getString(dot_shstrtab_sec, section->sh_name);
+ return object_error::success;
}
// Use the default symbol table name section.
- return getString(dot_strtab_sec, symb->st_name);
+ Result = getString(dot_strtab_sec, symb->st_name);
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-uint64_t ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolAddress(DataRefImpl Symb) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSymbolAddress(DataRefImpl Symb,
+ uint64_t &Result) const {
validateSymbol(Symb);
const Elf_Sym *symb = getSymbol(Symb);
const Elf_Shdr *Section;
switch (symb->st_shndx) {
case ELF::SHN_COMMON:
// Undefined symbols have no address yet.
- case ELF::SHN_UNDEF: return UnknownAddressOrSize;
- case ELF::SHN_ABS: return symb->st_value;
+ case ELF::SHN_UNDEF:
+ Result = UnknownAddressOrSize;
+ return object_error::success;
+ case ELF::SHN_ABS:
+ Result = symb->st_value;
+ return object_error::success;
default: Section = getSection(symb->st_shndx);
}
switch (symb->getType()) {
- case ELF::STT_SECTION: return Section ? Section->sh_addr
- : UnknownAddressOrSize;
+ case ELF::STT_SECTION:
+ Result = Section ? Section->sh_addr : UnknownAddressOrSize;
+ return object_error::success;
case ELF::STT_FUNC:
case ELF::STT_OBJECT:
case ELF::STT_NOTYPE:
- return symb->st_value;
- default: return UnknownAddressOrSize;
+ Result = symb->st_value;
+ return object_error::success;
+ default:
+ Result = UnknownAddressOrSize;
+ return object_error::success;
}
}
template<support::endianness target_endianness, bool is64Bits>
-uint64_t ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolSize(DataRefImpl Symb) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSymbolSize(DataRefImpl Symb,
+ uint64_t &Result) const {
validateSymbol(Symb);
const Elf_Sym *symb = getSymbol(Symb);
if (symb->st_size == 0)
- return UnknownAddressOrSize;
- return symb->st_size;
+ Result = UnknownAddressOrSize;
+ Result = symb->st_size;
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-char ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolNMTypeChar(DataRefImpl Symb) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSymbolNMTypeChar(DataRefImpl Symb,
+ char &Result) const {
validateSymbol(Symb);
const Elf_Sym *symb = getSymbol(Symb);
const Elf_Shdr *Section = getSection(symb->st_shndx);
@@ -390,71 +408,91 @@
ret = 'W';
}
- if (ret == '?' && symb->getType() == ELF::STT_SECTION)
- return StringSwitch<char>(getSymbolName(Symb))
+ if (ret == '?' && symb->getType() == ELF::STT_SECTION) {
+ StringRef name;
+ if (error_code ec = getSymbolName(Symb, name))
+ return ec;
+ Result = StringSwitch<char>(name)
.StartsWith(".debug", 'N')
.StartsWith(".note", 'n');
+ return object_error::success;
+ }
- return ret;
+ Result = ret;
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-bool ELFObjectFile<target_endianness, is64Bits>
- ::isSymbolInternal(DataRefImpl Symb) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::isSymbolInternal(DataRefImpl Symb,
+ bool &Result) const {
validateSymbol(Symb);
const Elf_Sym *symb = getSymbol(Symb);
if ( symb->getType() == ELF::STT_FILE
|| symb->getType() == ELF::STT_SECTION)
- return true;
- return false;
+ Result = true;
+ Result = false;
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-SectionRef ELFObjectFile<target_endianness, is64Bits>
- ::getSectionNext(DataRefImpl Sec) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSectionNext(DataRefImpl Sec, SectionRef &Result) const {
const uint8_t *sec = reinterpret_cast<const uint8_t *>(Sec.p);
sec += Header->e_shentsize;
Sec.p = reinterpret_cast<intptr_t>(sec);
- return SectionRef(Sec, this);
+ Result = SectionRef(Sec, this);
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-StringRef ELFObjectFile<target_endianness, is64Bits>
- ::getSectionName(DataRefImpl Sec) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSectionName(DataRefImpl Sec,
+ StringRef &Result) const {
const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- return StringRef(getString(dot_shstrtab_sec, sec->sh_name));
+ Result = StringRef(getString(dot_shstrtab_sec, sec->sh_name));
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-uint64_t ELFObjectFile<target_endianness, is64Bits>
- ::getSectionAddress(DataRefImpl Sec) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSectionAddress(DataRefImpl Sec,
+ uint64_t &Result) const {
const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- return sec->sh_addr;
+ Result = sec->sh_addr;
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-uint64_t ELFObjectFile<target_endianness, is64Bits>
- ::getSectionSize(DataRefImpl Sec) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSectionSize(DataRefImpl Sec,
+ uint64_t &Result) const {
const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- return sec->sh_size;
+ Result = sec->sh_size;
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-StringRef ELFObjectFile<target_endianness, is64Bits>
- ::getSectionContents(DataRefImpl Sec) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getSectionContents(DataRefImpl Sec,
+ StringRef &Result) const {
const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- const char *start = (char*)base() + sec->sh_offset;
- return StringRef(start, sec->sh_size);
+ const char *start = (const char*)base() + sec->sh_offset;
+ Result = StringRef(start, sec->sh_size);
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
-bool ELFObjectFile<target_endianness, is64Bits>
- ::isSectionText(DataRefImpl Sec) const {
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::isSectionText(DataRefImpl Sec,
+ bool &Result) const {
const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
if (sec->sh_flags & ELF::SHF_EXECINSTR)
- return true;
- return false;
+ Result = true;
+ else
+ Result = false;
+ return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
diff --git a/lib/Object/Error.cpp b/lib/Object/Error.cpp
index 40f97d4..2594625 100644
--- a/lib/Object/Error.cpp
+++ b/lib/Object/Error.cpp
@@ -37,6 +37,8 @@
return "The file was not recognized as a valid object file";
case object_error::parse_failed:
return "Invalid data was encountered while parsing the file";
+ case object_error::unexpected_eof:
+ return "The end of the file was unexpectedly encountered";
default:
llvm_unreachable("An enumerator of object_error does not have a message "
"defined.");
diff --git a/lib/Object/MachOObjectFile.cpp b/lib/Object/MachOObjectFile.cpp
index 3b76c6f..71f1f8c 100644
--- a/lib/Object/MachOObjectFile.cpp
+++ b/lib/Object/MachOObjectFile.cpp
@@ -47,19 +47,19 @@
virtual unsigned getArch() const;
protected:
- virtual SymbolRef getSymbolNext(DataRefImpl Symb) const;
- virtual StringRef getSymbolName(DataRefImpl Symb) const;
- virtual uint64_t getSymbolAddress(DataRefImpl Symb) const;
- virtual uint64_t getSymbolSize(DataRefImpl Symb) const;
- virtual char getSymbolNMTypeChar(DataRefImpl Symb) const;
- virtual bool isSymbolInternal(DataRefImpl Symb) const;
+ virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
+ virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
+ virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
+ virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
+ virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
+ virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const;
- virtual SectionRef getSectionNext(DataRefImpl Sec) const;
- virtual StringRef getSectionName(DataRefImpl Sec) const;
- virtual uint64_t getSectionAddress(DataRefImpl Sec) const;
- virtual uint64_t getSectionSize(DataRefImpl Sec) const;
- virtual StringRef getSectionContents(DataRefImpl Sec) const;
- virtual bool isSectionText(DataRefImpl Sec) const;
+ virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
+ virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
+ virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
+ virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
+ virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
+ virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
private:
MachOObject *MachOObj;
@@ -115,29 +115,38 @@
}
-SymbolRef MachOObjectFile::getSymbolNext(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSymbolNext(DataRefImpl DRI,
+ SymbolRef &Result) const {
DRI.d.b++;
moveToNextSymbol(DRI);
- return SymbolRef(DRI, this);
+ Result = SymbolRef(DRI, this);
+ return object_error::success;
}
-StringRef MachOObjectFile::getSymbolName(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSymbolName(DataRefImpl DRI,
+ StringRef &Result) const {
InMemoryStruct<macho::SymbolTableEntry> Entry;
getSymbolTableEntry(DRI, Entry);
- return MachOObj->getStringAtIndex(Entry->StringIndex);
+ Result = MachOObj->getStringAtIndex(Entry->StringIndex);
+ return object_error::success;
}
-uint64_t MachOObjectFile::getSymbolAddress(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSymbolAddress(DataRefImpl DRI,
+ uint64_t &Result) const {
InMemoryStruct<macho::SymbolTableEntry> Entry;
getSymbolTableEntry(DRI, Entry);
- return Entry->Value;
+ Result = Entry->Value;
+ return object_error::success;
}
-uint64_t MachOObjectFile::getSymbolSize(DataRefImpl DRI) const {
- return UnknownAddressOrSize;
+error_code MachOObjectFile::getSymbolSize(DataRefImpl DRI,
+ uint64_t &Result) const {
+ Result = UnknownAddressOrSize;
+ return object_error::success;
}
-char MachOObjectFile::getSymbolNMTypeChar(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSymbolNMTypeChar(DataRefImpl DRI,
+ char &Result) const {
InMemoryStruct<macho::SymbolTableEntry> Entry;
getSymbolTableEntry(DRI, Entry);
@@ -157,13 +166,16 @@
if (Entry->Flags & (macho::STF_External | macho::STF_PrivateExtern))
Char = toupper(Char);
- return Char;
+ Result = Char;
+ return object_error::success;
}
-bool MachOObjectFile::isSymbolInternal(DataRefImpl DRI) const {
+error_code MachOObjectFile::isSymbolInternal(DataRefImpl DRI,
+ bool &Result) const {
InMemoryStruct<macho::SymbolTableEntry> Entry;
getSymbolTableEntry(DRI, Entry);
- return Entry->Flags & macho::STF_StabsEntryMask;
+ Result = Entry->Flags & macho::STF_StabsEntryMask;
+ return object_error::success;
}
ObjectFile::symbol_iterator MachOObjectFile::begin_symbols() const {
@@ -205,10 +217,12 @@
}
}
-SectionRef MachOObjectFile::getSectionNext(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSectionNext(DataRefImpl DRI,
+ SectionRef &Result) const {
DRI.d.b++;
moveToNextSection(DRI);
- return SectionRef(DRI, this);
+ Result = SectionRef(DRI, this);
+ return object_error::success;
}
void
@@ -220,43 +234,53 @@
MachOObj->ReadSection(LCI, DRI.d.b, Res);
}
-StringRef MachOObjectFile::getSectionName(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSectionName(DataRefImpl DRI,
+ StringRef &Result) const {
InMemoryStruct<macho::SegmentLoadCommand> SLC;
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
MachOObj->ReadSegmentLoadCommand(LCI, SLC);
InMemoryStruct<macho::Section> Sect;
MachOObj->ReadSection(LCI, DRI.d.b, Sect);
- static char Result[34];
- strcpy(Result, SLC->Name);
- strcat(Result, ",");
- strcat(Result, Sect->Name);
- return StringRef(Result);
+ static char result[34];
+ strcpy(result, SLC->Name);
+ strcat(result, ",");
+ strcat(result, Sect->Name);
+ Result = StringRef(result);
+ return object_error::success;
}
-uint64_t MachOObjectFile::getSectionAddress(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSectionAddress(DataRefImpl DRI,
+ uint64_t &Result) const {
InMemoryStruct<macho::Section> Sect;
getSection(DRI, Sect);
- return Sect->Address;
+ Result = Sect->Address;
+ return object_error::success;
}
-uint64_t MachOObjectFile::getSectionSize(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSectionSize(DataRefImpl DRI,
+ uint64_t &Result) const {
InMemoryStruct<macho::Section> Sect;
getSection(DRI, Sect);
- return Sect->Size;
+ Result = Sect->Size;
+ return object_error::success;
}
-StringRef MachOObjectFile::getSectionContents(DataRefImpl DRI) const {
+error_code MachOObjectFile::getSectionContents(DataRefImpl DRI,
+ StringRef &Result) const {
InMemoryStruct<macho::Section> Sect;
getSection(DRI, Sect);
- return MachOObj->getData(Sect->Offset, Sect->Size);
+ Result = MachOObj->getData(Sect->Offset, Sect->Size);
+ return object_error::success;
}
-bool MachOObjectFile::isSectionText(DataRefImpl DRI) const {
+error_code MachOObjectFile::isSectionText(DataRefImpl DRI,
+ bool &Result) const {
InMemoryStruct<macho::SegmentLoadCommand> SLC;
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
MachOObj->ReadSegmentLoadCommand(LCI, SLC);
- return !strcmp(SLC->Name, "__TEXT");
+ Result = !strcmp(SLC->Name, "__TEXT");
+ return object_error::success;
}
ObjectFile::section_iterator MachOObjectFile::begin_sections() const {
diff --git a/lib/Object/Object.cpp b/lib/Object/Object.cpp
index 603b23c..9a373ad 100644
--- a/lib/Object/Object.cpp
+++ b/lib/Object/Object.cpp
@@ -41,19 +41,28 @@
}
void LLVMMoveToNextSection(LLVMSectionIteratorRef SI) {
- // We can't use unwrap() here because the argument to ++ must be an lvalue.
- ++*reinterpret_cast<ObjectFile::section_iterator*>(SI);
+ error_code ec;
+ unwrap(SI)->increment(ec);
+ if (ec) report_fatal_error("LLVMMoveToNextSection failed: " + ec.message());
}
const char *LLVMGetSectionName(LLVMSectionIteratorRef SI) {
- return (*unwrap(SI))->getName().data();
+ StringRef ret;
+ if (error_code ec = (*unwrap(SI))->getName(ret))
+ report_fatal_error(ec.message());
+ return ret.data();
}
uint64_t LLVMGetSectionSize(LLVMSectionIteratorRef SI) {
- return (*unwrap(SI))->getSize();
+ uint64_t ret;
+ if (error_code ec = (*unwrap(SI))->getSize(ret))
+ report_fatal_error(ec.message());
+ return ret;
}
const char *LLVMGetSectionContents(LLVMSectionIteratorRef SI) {
- return (*unwrap(SI))->getContents().data();
+ StringRef ret;
+ if (error_code ec = (*unwrap(SI))->getContents(ret))
+ report_fatal_error(ec.message());
+ return ret.data();
}
-