forked from OSchip/llvm-project
768 lines
26 KiB
C++
768 lines
26 KiB
C++
//===-- llvm-rtdyld.cpp - MCJIT Testing Tool ------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This is a testing tool for use with the MC-JIT LLVM components.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/StringMap.h"
|
|
#include "llvm/DebugInfo/DIContext.h"
|
|
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
|
|
#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
|
|
#include "llvm/ExecutionEngine/RuntimeDyld.h"
|
|
#include "llvm/ExecutionEngine/RuntimeDyldChecker.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
|
|
#include "llvm/MC/MCInstPrinter.h"
|
|
#include "llvm/MC/MCInstrInfo.h"
|
|
#include "llvm/MC/MCRegisterInfo.h"
|
|
#include "llvm/MC/MCSubtargetInfo.h"
|
|
#include "llvm/Object/SymbolSize.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/DynamicLibrary.h"
|
|
#include "llvm/Support/InitLLVM.h"
|
|
#include "llvm/Support/Memory.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/TargetRegistry.h"
|
|
#include "llvm/Support/TargetSelect.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <list>
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::object;
|
|
|
|
static cl::list<std::string>
|
|
InputFileList(cl::Positional, cl::ZeroOrMore,
|
|
cl::desc("<input files>"));
|
|
|
|
enum ActionType {
|
|
AC_Execute,
|
|
AC_PrintObjectLineInfo,
|
|
AC_PrintLineInfo,
|
|
AC_PrintDebugLineInfo,
|
|
AC_Verify
|
|
};
|
|
|
|
static cl::opt<ActionType>
|
|
Action(cl::desc("Action to perform:"),
|
|
cl::init(AC_Execute),
|
|
cl::values(clEnumValN(AC_Execute, "execute",
|
|
"Load, link, and execute the inputs."),
|
|
clEnumValN(AC_PrintLineInfo, "printline",
|
|
"Load, link, and print line information for each function."),
|
|
clEnumValN(AC_PrintDebugLineInfo, "printdebugline",
|
|
"Load, link, and print line information for each function using the debug object"),
|
|
clEnumValN(AC_PrintObjectLineInfo, "printobjline",
|
|
"Like -printlineinfo but does not load the object first"),
|
|
clEnumValN(AC_Verify, "verify",
|
|
"Load, link and verify the resulting memory image.")));
|
|
|
|
static cl::opt<std::string>
|
|
EntryPoint("entry",
|
|
cl::desc("Function to call as entry point."),
|
|
cl::init("_main"));
|
|
|
|
static cl::list<std::string>
|
|
Dylibs("dylib",
|
|
cl::desc("Add library."),
|
|
cl::ZeroOrMore);
|
|
|
|
static cl::opt<std::string>
|
|
TripleName("triple", cl::desc("Target triple for disassembler"));
|
|
|
|
static cl::opt<std::string>
|
|
MCPU("mcpu",
|
|
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
|
|
cl::value_desc("cpu-name"),
|
|
cl::init(""));
|
|
|
|
static cl::list<std::string>
|
|
CheckFiles("check",
|
|
cl::desc("File containing RuntimeDyld verifier checks."),
|
|
cl::ZeroOrMore);
|
|
|
|
// Tracking BUG: 19665
|
|
// http://llvm.org/bugs/show_bug.cgi?id=19665
|
|
//
|
|
// Do not change these options to cl::opt<uint64_t> since this silently breaks
|
|
// argument parsing.
|
|
static cl::opt<unsigned long long>
|
|
PreallocMemory("preallocate",
|
|
cl::desc("Allocate memory upfront rather than on-demand"),
|
|
cl::init(0));
|
|
|
|
static cl::opt<unsigned long long>
|
|
TargetAddrStart("target-addr-start",
|
|
cl::desc("For -verify only: start of phony target address "
|
|
"range."),
|
|
cl::init(4096), // Start at "page 1" - no allocating at "null".
|
|
cl::Hidden);
|
|
|
|
static cl::opt<unsigned long long>
|
|
TargetAddrEnd("target-addr-end",
|
|
cl::desc("For -verify only: end of phony target address range."),
|
|
cl::init(~0ULL),
|
|
cl::Hidden);
|
|
|
|
static cl::opt<unsigned long long>
|
|
TargetSectionSep("target-section-sep",
|
|
cl::desc("For -verify only: Separation between sections in "
|
|
"phony target address space."),
|
|
cl::init(0),
|
|
cl::Hidden);
|
|
|
|
static cl::list<std::string>
|
|
SpecificSectionMappings("map-section",
|
|
cl::desc("For -verify only: Map a section to a "
|
|
"specific address."),
|
|
cl::ZeroOrMore,
|
|
cl::Hidden);
|
|
|
|
static cl::list<std::string>
|
|
DummySymbolMappings("dummy-extern",
|
|
cl::desc("For -verify only: Inject a symbol into the extern "
|
|
"symbol table."),
|
|
cl::ZeroOrMore,
|
|
cl::Hidden);
|
|
|
|
static cl::opt<bool>
|
|
PrintAllocationRequests("print-alloc-requests",
|
|
cl::desc("Print allocation requests made to the memory "
|
|
"manager by RuntimeDyld"),
|
|
cl::Hidden);
|
|
|
|
/* *** */
|
|
|
|
// A trivial memory manager that doesn't do anything fancy, just uses the
|
|
// support library allocation routines directly.
|
|
class TrivialMemoryManager : public RTDyldMemoryManager {
|
|
public:
|
|
SmallVector<sys::MemoryBlock, 16> FunctionMemory;
|
|
SmallVector<sys::MemoryBlock, 16> DataMemory;
|
|
|
|
uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
|
|
unsigned SectionID,
|
|
StringRef SectionName) override;
|
|
uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
|
|
unsigned SectionID, StringRef SectionName,
|
|
bool IsReadOnly) override;
|
|
|
|
void *getPointerToNamedFunction(const std::string &Name,
|
|
bool AbortOnFailure = true) override {
|
|
return nullptr;
|
|
}
|
|
|
|
bool finalizeMemory(std::string *ErrMsg) override { return false; }
|
|
|
|
void addDummySymbol(const std::string &Name, uint64_t Addr) {
|
|
DummyExterns[Name] = Addr;
|
|
}
|
|
|
|
JITSymbol findSymbol(const std::string &Name) override {
|
|
auto I = DummyExterns.find(Name);
|
|
|
|
if (I != DummyExterns.end())
|
|
return JITSymbol(I->second, JITSymbolFlags::Exported);
|
|
|
|
return RTDyldMemoryManager::findSymbol(Name);
|
|
}
|
|
|
|
void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
|
|
size_t Size) override {}
|
|
void deregisterEHFrames() override {}
|
|
|
|
void preallocateSlab(uint64_t Size) {
|
|
std::error_code EC;
|
|
sys::MemoryBlock MB =
|
|
sys::Memory::allocateMappedMemory(Size, nullptr,
|
|
sys::Memory::MF_READ |
|
|
sys::Memory::MF_WRITE,
|
|
EC);
|
|
if (!MB.base())
|
|
report_fatal_error("Can't allocate enough memory: " + EC.message());
|
|
|
|
PreallocSlab = MB;
|
|
UsePreallocation = true;
|
|
SlabSize = Size;
|
|
}
|
|
|
|
uint8_t *allocateFromSlab(uintptr_t Size, unsigned Alignment, bool isCode) {
|
|
Size = alignTo(Size, Alignment);
|
|
if (CurrentSlabOffset + Size > SlabSize)
|
|
report_fatal_error("Can't allocate enough memory. Tune --preallocate");
|
|
|
|
uintptr_t OldSlabOffset = CurrentSlabOffset;
|
|
sys::MemoryBlock MB((void *)OldSlabOffset, Size);
|
|
if (isCode)
|
|
FunctionMemory.push_back(MB);
|
|
else
|
|
DataMemory.push_back(MB);
|
|
CurrentSlabOffset += Size;
|
|
return (uint8_t*)OldSlabOffset;
|
|
}
|
|
|
|
private:
|
|
std::map<std::string, uint64_t> DummyExterns;
|
|
sys::MemoryBlock PreallocSlab;
|
|
bool UsePreallocation = false;
|
|
uintptr_t SlabSize = 0;
|
|
uintptr_t CurrentSlabOffset = 0;
|
|
};
|
|
|
|
uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
|
|
unsigned Alignment,
|
|
unsigned SectionID,
|
|
StringRef SectionName) {
|
|
if (PrintAllocationRequests)
|
|
outs() << "allocateCodeSection(Size = " << Size << ", Alignment = "
|
|
<< Alignment << ", SectionName = " << SectionName << ")\n";
|
|
|
|
if (UsePreallocation)
|
|
return allocateFromSlab(Size, Alignment, true /* isCode */);
|
|
|
|
std::error_code EC;
|
|
sys::MemoryBlock MB =
|
|
sys::Memory::allocateMappedMemory(Size, nullptr,
|
|
sys::Memory::MF_READ |
|
|
sys::Memory::MF_WRITE,
|
|
EC);
|
|
if (!MB.base())
|
|
report_fatal_error("MemoryManager allocation failed: " + EC.message());
|
|
FunctionMemory.push_back(MB);
|
|
return (uint8_t*)MB.base();
|
|
}
|
|
|
|
uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size,
|
|
unsigned Alignment,
|
|
unsigned SectionID,
|
|
StringRef SectionName,
|
|
bool IsReadOnly) {
|
|
if (PrintAllocationRequests)
|
|
outs() << "allocateDataSection(Size = " << Size << ", Alignment = "
|
|
<< Alignment << ", SectionName = " << SectionName << ")\n";
|
|
|
|
if (UsePreallocation)
|
|
return allocateFromSlab(Size, Alignment, false /* isCode */);
|
|
|
|
std::error_code EC;
|
|
sys::MemoryBlock MB =
|
|
sys::Memory::allocateMappedMemory(Size, nullptr,
|
|
sys::Memory::MF_READ |
|
|
sys::Memory::MF_WRITE,
|
|
EC);
|
|
if (!MB.base())
|
|
report_fatal_error("MemoryManager allocation failed: " + EC.message());
|
|
DataMemory.push_back(MB);
|
|
return (uint8_t*)MB.base();
|
|
}
|
|
|
|
static const char *ProgramName;
|
|
|
|
static void ErrorAndExit(const Twine &Msg) {
|
|
errs() << ProgramName << ": error: " << Msg << "\n";
|
|
exit(1);
|
|
}
|
|
|
|
static void loadDylibs() {
|
|
for (const std::string &Dylib : Dylibs) {
|
|
if (!sys::fs::is_regular_file(Dylib))
|
|
report_fatal_error("Dylib not found: '" + Dylib + "'.");
|
|
std::string ErrMsg;
|
|
if (sys::DynamicLibrary::LoadLibraryPermanently(Dylib.c_str(), &ErrMsg))
|
|
report_fatal_error("Error loading '" + Dylib + "': " + ErrMsg);
|
|
}
|
|
}
|
|
|
|
/* *** */
|
|
|
|
static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
|
|
assert(LoadObjects || !UseDebugObj);
|
|
|
|
// Load any dylibs requested on the command line.
|
|
loadDylibs();
|
|
|
|
// If we don't have any input files, read from stdin.
|
|
if (!InputFileList.size())
|
|
InputFileList.push_back("-");
|
|
for (auto &File : InputFileList) {
|
|
// Instantiate a dynamic linker.
|
|
TrivialMemoryManager MemMgr;
|
|
RuntimeDyld Dyld(MemMgr, MemMgr);
|
|
|
|
// Load the input memory buffer.
|
|
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
|
|
MemoryBuffer::getFileOrSTDIN(File);
|
|
if (std::error_code EC = InputBuffer.getError())
|
|
ErrorAndExit("unable to read input: '" + EC.message() + "'");
|
|
|
|
Expected<std::unique_ptr<ObjectFile>> MaybeObj(
|
|
ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
|
|
|
|
if (!MaybeObj) {
|
|
std::string Buf;
|
|
raw_string_ostream OS(Buf);
|
|
logAllUnhandledErrors(MaybeObj.takeError(), OS);
|
|
OS.flush();
|
|
ErrorAndExit("unable to create object file: '" + Buf + "'");
|
|
}
|
|
|
|
ObjectFile &Obj = **MaybeObj;
|
|
|
|
OwningBinary<ObjectFile> DebugObj;
|
|
std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr;
|
|
ObjectFile *SymbolObj = &Obj;
|
|
if (LoadObjects) {
|
|
// Load the object file
|
|
LoadedObjInfo =
|
|
Dyld.loadObject(Obj);
|
|
|
|
if (Dyld.hasError())
|
|
ErrorAndExit(Dyld.getErrorString());
|
|
|
|
// Resolve all the relocations we can.
|
|
Dyld.resolveRelocations();
|
|
|
|
if (UseDebugObj) {
|
|
DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
|
|
SymbolObj = DebugObj.getBinary();
|
|
LoadedObjInfo.reset();
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<DIContext> Context =
|
|
DWARFContext::create(*SymbolObj, LoadedObjInfo.get());
|
|
|
|
std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
|
|
object::computeSymbolSizes(*SymbolObj);
|
|
|
|
// Use symbol info to iterate functions in the object.
|
|
for (const auto &P : SymAddr) {
|
|
object::SymbolRef Sym = P.first;
|
|
Expected<SymbolRef::Type> TypeOrErr = Sym.getType();
|
|
if (!TypeOrErr) {
|
|
// TODO: Actually report errors helpfully.
|
|
consumeError(TypeOrErr.takeError());
|
|
continue;
|
|
}
|
|
SymbolRef::Type Type = *TypeOrErr;
|
|
if (Type == object::SymbolRef::ST_Function) {
|
|
Expected<StringRef> Name = Sym.getName();
|
|
if (!Name) {
|
|
// TODO: Actually report errors helpfully.
|
|
consumeError(Name.takeError());
|
|
continue;
|
|
}
|
|
Expected<uint64_t> AddrOrErr = Sym.getAddress();
|
|
if (!AddrOrErr) {
|
|
// TODO: Actually report errors helpfully.
|
|
consumeError(AddrOrErr.takeError());
|
|
continue;
|
|
}
|
|
uint64_t Addr = *AddrOrErr;
|
|
|
|
uint64_t Size = P.second;
|
|
// If we're not using the debug object, compute the address of the
|
|
// symbol in memory (rather than that in the unrelocated object file)
|
|
// and use that to query the DWARFContext.
|
|
if (!UseDebugObj && LoadObjects) {
|
|
auto SecOrErr = Sym.getSection();
|
|
if (!SecOrErr) {
|
|
// TODO: Actually report errors helpfully.
|
|
consumeError(SecOrErr.takeError());
|
|
continue;
|
|
}
|
|
object::section_iterator Sec = *SecOrErr;
|
|
StringRef SecName;
|
|
Sec->getName(SecName);
|
|
uint64_t SectionLoadAddress =
|
|
LoadedObjInfo->getSectionLoadAddress(*Sec);
|
|
if (SectionLoadAddress != 0)
|
|
Addr += SectionLoadAddress - Sec->getAddress();
|
|
}
|
|
|
|
outs() << "Function: " << *Name << ", Size = " << Size
|
|
<< ", Addr = " << Addr << "\n";
|
|
|
|
DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
|
|
for (auto &D : Lines) {
|
|
outs() << " Line info @ " << D.first - Addr << ": "
|
|
<< D.second.FileName << ", line:" << D.second.Line << "\n";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void doPreallocation(TrivialMemoryManager &MemMgr) {
|
|
// Allocate a slab of memory upfront, if required. This is used if
|
|
// we want to test small code models.
|
|
if (static_cast<intptr_t>(PreallocMemory) < 0)
|
|
report_fatal_error("Pre-allocated bytes of memory must be a positive integer.");
|
|
|
|
// FIXME: Limit the amount of memory that can be preallocated?
|
|
if (PreallocMemory != 0)
|
|
MemMgr.preallocateSlab(PreallocMemory);
|
|
}
|
|
|
|
static int executeInput() {
|
|
// Load any dylibs requested on the command line.
|
|
loadDylibs();
|
|
|
|
// Instantiate a dynamic linker.
|
|
TrivialMemoryManager MemMgr;
|
|
doPreallocation(MemMgr);
|
|
RuntimeDyld Dyld(MemMgr, MemMgr);
|
|
|
|
// If we don't have any input files, read from stdin.
|
|
if (!InputFileList.size())
|
|
InputFileList.push_back("-");
|
|
for (auto &File : InputFileList) {
|
|
// Load the input memory buffer.
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
|
|
MemoryBuffer::getFileOrSTDIN(File);
|
|
if (std::error_code EC = InputBuffer.getError())
|
|
ErrorAndExit("unable to read input: '" + EC.message() + "'");
|
|
Expected<std::unique_ptr<ObjectFile>> MaybeObj(
|
|
ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
|
|
|
|
if (!MaybeObj) {
|
|
std::string Buf;
|
|
raw_string_ostream OS(Buf);
|
|
logAllUnhandledErrors(MaybeObj.takeError(), OS);
|
|
OS.flush();
|
|
ErrorAndExit("unable to create object file: '" + Buf + "'");
|
|
}
|
|
|
|
ObjectFile &Obj = **MaybeObj;
|
|
|
|
// Load the object file
|
|
Dyld.loadObject(Obj);
|
|
if (Dyld.hasError()) {
|
|
ErrorAndExit(Dyld.getErrorString());
|
|
}
|
|
}
|
|
|
|
// Resove all the relocations we can.
|
|
// FIXME: Error out if there are unresolved relocations.
|
|
Dyld.resolveRelocations();
|
|
|
|
// Get the address of the entry point (_main by default).
|
|
void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
|
|
if (!MainAddress)
|
|
ErrorAndExit("no definition for '" + EntryPoint + "'");
|
|
|
|
// Invalidate the instruction cache for each loaded function.
|
|
for (auto &FM : MemMgr.FunctionMemory) {
|
|
|
|
// Make sure the memory is executable.
|
|
// setExecutable will call InvalidateInstructionCache.
|
|
if (auto EC = sys::Memory::protectMappedMemory(FM,
|
|
sys::Memory::MF_READ |
|
|
sys::Memory::MF_EXEC))
|
|
ErrorAndExit("unable to mark function executable: '" + EC.message() +
|
|
"'");
|
|
}
|
|
|
|
// Dispatch to _main().
|
|
errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";
|
|
|
|
int (*Main)(int, const char**) =
|
|
(int(*)(int,const char**)) uintptr_t(MainAddress);
|
|
const char **Argv = new const char*[2];
|
|
// Use the name of the first input object module as argv[0] for the target.
|
|
Argv[0] = InputFileList[0].c_str();
|
|
Argv[1] = nullptr;
|
|
return Main(1, Argv);
|
|
}
|
|
|
|
static int checkAllExpressions(RuntimeDyldChecker &Checker) {
|
|
for (const auto& CheckerFileName : CheckFiles) {
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> CheckerFileBuf =
|
|
MemoryBuffer::getFileOrSTDIN(CheckerFileName);
|
|
if (std::error_code EC = CheckerFileBuf.getError())
|
|
ErrorAndExit("unable to read input '" + CheckerFileName + "': " +
|
|
EC.message());
|
|
|
|
if (!Checker.checkAllRulesInBuffer("# rtdyld-check:",
|
|
CheckerFileBuf.get().get()))
|
|
ErrorAndExit("some checks in '" + CheckerFileName + "' failed");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void applySpecificSectionMappings(RuntimeDyldChecker &Checker) {
|
|
|
|
for (StringRef Mapping : SpecificSectionMappings) {
|
|
|
|
size_t EqualsIdx = Mapping.find_first_of("=");
|
|
std::string SectionIDStr = Mapping.substr(0, EqualsIdx);
|
|
size_t ComaIdx = Mapping.find_first_of(",");
|
|
|
|
if (ComaIdx == StringRef::npos)
|
|
report_fatal_error("Invalid section specification '" + Mapping +
|
|
"'. Should be '<file name>,<section name>=<addr>'");
|
|
|
|
std::string FileName = SectionIDStr.substr(0, ComaIdx);
|
|
std::string SectionName = SectionIDStr.substr(ComaIdx + 1);
|
|
|
|
uint64_t OldAddrInt;
|
|
std::string ErrorMsg;
|
|
std::tie(OldAddrInt, ErrorMsg) =
|
|
Checker.getSectionAddr(FileName, SectionName, true);
|
|
|
|
if (ErrorMsg != "")
|
|
report_fatal_error(ErrorMsg);
|
|
|
|
void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt));
|
|
|
|
std::string NewAddrStr = Mapping.substr(EqualsIdx + 1);
|
|
uint64_t NewAddr;
|
|
|
|
if (StringRef(NewAddrStr).getAsInteger(0, NewAddr))
|
|
report_fatal_error("Invalid section address in mapping '" + Mapping +
|
|
"'.");
|
|
|
|
Checker.getRTDyld().mapSectionAddress(OldAddr, NewAddr);
|
|
}
|
|
}
|
|
|
|
// Scatter sections in all directions!
|
|
// Remaps section addresses for -verify mode. The following command line options
|
|
// can be used to customize the layout of the memory within the phony target's
|
|
// address space:
|
|
// -target-addr-start <s> -- Specify where the phony target address range starts.
|
|
// -target-addr-end <e> -- Specify where the phony target address range ends.
|
|
// -target-section-sep <d> -- Specify how big a gap should be left between the
|
|
// end of one section and the start of the next.
|
|
// Defaults to zero. Set to something big
|
|
// (e.g. 1 << 32) to stress-test stubs, GOTs, etc.
|
|
//
|
|
static void remapSectionsAndSymbols(const llvm::Triple &TargetTriple,
|
|
TrivialMemoryManager &MemMgr,
|
|
RuntimeDyldChecker &Checker) {
|
|
|
|
// Set up a work list (section addr/size pairs).
|
|
typedef std::list<std::pair<void*, uint64_t>> WorklistT;
|
|
WorklistT Worklist;
|
|
|
|
for (const auto& CodeSection : MemMgr.FunctionMemory)
|
|
Worklist.push_back(std::make_pair(CodeSection.base(), CodeSection.size()));
|
|
for (const auto& DataSection : MemMgr.DataMemory)
|
|
Worklist.push_back(std::make_pair(DataSection.base(), DataSection.size()));
|
|
|
|
// Apply any section-specific mappings that were requested on the command
|
|
// line.
|
|
applySpecificSectionMappings(Checker);
|
|
|
|
// Keep an "already allocated" mapping of section target addresses to sizes.
|
|
// Sections whose address mappings aren't specified on the command line will
|
|
// allocated around the explicitly mapped sections while maintaining the
|
|
// minimum separation.
|
|
std::map<uint64_t, uint64_t> AlreadyAllocated;
|
|
|
|
// Move the previously applied mappings (whether explicitly specified on the
|
|
// command line, or implicitly set by RuntimeDyld) into the already-allocated
|
|
// map.
|
|
for (WorklistT::iterator I = Worklist.begin(), E = Worklist.end();
|
|
I != E;) {
|
|
WorklistT::iterator Tmp = I;
|
|
++I;
|
|
auto LoadAddr = Checker.getSectionLoadAddress(Tmp->first);
|
|
|
|
if (LoadAddr &&
|
|
*LoadAddr != static_cast<uint64_t>(
|
|
reinterpret_cast<uintptr_t>(Tmp->first))) {
|
|
// A section will have a LoadAddr of 0 if it wasn't loaded for whatever
|
|
// reason (e.g. zero byte COFF sections). Don't include those sections in
|
|
// the allocation map.
|
|
if (*LoadAddr != 0)
|
|
AlreadyAllocated[*LoadAddr] = Tmp->second;
|
|
Worklist.erase(Tmp);
|
|
}
|
|
}
|
|
|
|
// If the -target-addr-end option wasn't explicitly passed, then set it to a
|
|
// sensible default based on the target triple.
|
|
if (TargetAddrEnd.getNumOccurrences() == 0) {
|
|
if (TargetTriple.isArch16Bit())
|
|
TargetAddrEnd = (1ULL << 16) - 1;
|
|
else if (TargetTriple.isArch32Bit())
|
|
TargetAddrEnd = (1ULL << 32) - 1;
|
|
// TargetAddrEnd already has a sensible default for 64-bit systems, so
|
|
// there's nothing to do in the 64-bit case.
|
|
}
|
|
|
|
// Process any elements remaining in the worklist.
|
|
while (!Worklist.empty()) {
|
|
std::pair<void*, uint64_t> CurEntry = Worklist.front();
|
|
Worklist.pop_front();
|
|
|
|
uint64_t NextSectionAddr = TargetAddrStart;
|
|
|
|
for (const auto &Alloc : AlreadyAllocated)
|
|
if (NextSectionAddr + CurEntry.second + TargetSectionSep <= Alloc.first)
|
|
break;
|
|
else
|
|
NextSectionAddr = Alloc.first + Alloc.second + TargetSectionSep;
|
|
|
|
AlreadyAllocated[NextSectionAddr] = CurEntry.second;
|
|
Checker.getRTDyld().mapSectionAddress(CurEntry.first, NextSectionAddr);
|
|
}
|
|
|
|
// Add dummy symbols to the memory manager.
|
|
for (const auto &Mapping : DummySymbolMappings) {
|
|
size_t EqualsIdx = Mapping.find_first_of('=');
|
|
|
|
if (EqualsIdx == StringRef::npos)
|
|
report_fatal_error("Invalid dummy symbol specification '" + Mapping +
|
|
"'. Should be '<symbol name>=<addr>'");
|
|
|
|
std::string Symbol = Mapping.substr(0, EqualsIdx);
|
|
std::string AddrStr = Mapping.substr(EqualsIdx + 1);
|
|
|
|
uint64_t Addr;
|
|
if (StringRef(AddrStr).getAsInteger(0, Addr))
|
|
report_fatal_error("Invalid symbol mapping '" + Mapping + "'.");
|
|
|
|
MemMgr.addDummySymbol(Symbol, Addr);
|
|
}
|
|
}
|
|
|
|
// Load and link the objects specified on the command line, but do not execute
|
|
// anything. Instead, attach a RuntimeDyldChecker instance and call it to
|
|
// verify the correctness of the linked memory.
|
|
static int linkAndVerify() {
|
|
|
|
// Check for missing triple.
|
|
if (TripleName == "")
|
|
ErrorAndExit("-triple required when running in -verify mode.");
|
|
|
|
// Look up the target and build the disassembler.
|
|
Triple TheTriple(Triple::normalize(TripleName));
|
|
std::string ErrorStr;
|
|
const Target *TheTarget =
|
|
TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
|
|
if (!TheTarget)
|
|
ErrorAndExit("Error accessing target '" + TripleName + "': " + ErrorStr);
|
|
|
|
TripleName = TheTriple.getTriple();
|
|
|
|
std::unique_ptr<MCSubtargetInfo> STI(
|
|
TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
|
|
if (!STI)
|
|
ErrorAndExit("Unable to create subtarget info!");
|
|
|
|
std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
|
|
if (!MRI)
|
|
ErrorAndExit("Unable to create target register info!");
|
|
|
|
std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
|
|
if (!MAI)
|
|
ErrorAndExit("Unable to create target asm info!");
|
|
|
|
MCContext Ctx(MAI.get(), MRI.get(), nullptr);
|
|
|
|
std::unique_ptr<MCDisassembler> Disassembler(
|
|
TheTarget->createMCDisassembler(*STI, Ctx));
|
|
if (!Disassembler)
|
|
ErrorAndExit("Unable to create disassembler!");
|
|
|
|
std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
|
|
|
|
std::unique_ptr<MCInstPrinter> InstPrinter(
|
|
TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));
|
|
|
|
// Load any dylibs requested on the command line.
|
|
loadDylibs();
|
|
|
|
// Instantiate a dynamic linker.
|
|
TrivialMemoryManager MemMgr;
|
|
doPreallocation(MemMgr);
|
|
RuntimeDyld Dyld(MemMgr, MemMgr);
|
|
Dyld.setProcessAllSections(true);
|
|
RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
|
|
llvm::dbgs());
|
|
|
|
// If we don't have any input files, read from stdin.
|
|
if (!InputFileList.size())
|
|
InputFileList.push_back("-");
|
|
for (auto &Filename : InputFileList) {
|
|
// Load the input memory buffer.
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
|
|
MemoryBuffer::getFileOrSTDIN(Filename);
|
|
|
|
if (std::error_code EC = InputBuffer.getError())
|
|
ErrorAndExit("unable to read input: '" + EC.message() + "'");
|
|
|
|
Expected<std::unique_ptr<ObjectFile>> MaybeObj(
|
|
ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
|
|
|
|
if (!MaybeObj) {
|
|
std::string Buf;
|
|
raw_string_ostream OS(Buf);
|
|
logAllUnhandledErrors(MaybeObj.takeError(), OS);
|
|
OS.flush();
|
|
ErrorAndExit("unable to create object file: '" + Buf + "'");
|
|
}
|
|
|
|
ObjectFile &Obj = **MaybeObj;
|
|
|
|
// Load the object file
|
|
Dyld.loadObject(Obj);
|
|
if (Dyld.hasError()) {
|
|
ErrorAndExit(Dyld.getErrorString());
|
|
}
|
|
}
|
|
|
|
// Re-map the section addresses into the phony target address space and add
|
|
// dummy symbols.
|
|
remapSectionsAndSymbols(TheTriple, MemMgr, Checker);
|
|
|
|
// Resolve all the relocations we can.
|
|
Dyld.resolveRelocations();
|
|
|
|
// Register EH frames.
|
|
Dyld.registerEHFrames();
|
|
|
|
int ErrorCode = checkAllExpressions(Checker);
|
|
if (Dyld.hasError())
|
|
ErrorAndExit("RTDyld reported an error applying relocations:\n " +
|
|
Dyld.getErrorString());
|
|
|
|
return ErrorCode;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
InitLLVM X(argc, argv);
|
|
ProgramName = argv[0];
|
|
|
|
llvm::InitializeAllTargetInfos();
|
|
llvm::InitializeAllTargetMCs();
|
|
llvm::InitializeAllDisassemblers();
|
|
|
|
cl::ParseCommandLineOptions(argc, argv, "llvm MC-JIT tool\n");
|
|
|
|
switch (Action) {
|
|
case AC_Execute:
|
|
return executeInput();
|
|
case AC_PrintDebugLineInfo:
|
|
return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */ true);
|
|
case AC_PrintLineInfo:
|
|
return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */false);
|
|
case AC_PrintObjectLineInfo:
|
|
return printLineInfoForInput(/* LoadObjects */false,/* UseDebugObj */false);
|
|
case AC_Verify:
|
|
return linkAndVerify();
|
|
}
|
|
}
|