//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringMap.h"
-#include "llvm/DebugInfo/DWARF/DIContext.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/MCInstPrinter.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Object/MachO.h"
+#include "llvm/Object/SymbolSize.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/ManagedStatic.h"
enum ActionType {
AC_Execute,
+ AC_PrintObjectLineInfo,
AC_PrintLineInfo,
+ AC_PrintDebugLineInfo,
AC_Verify
};
"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."),
clEnumValEnd));
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."),
static cl::list<std::string>
SpecificSectionMappings("map-section",
- cl::desc("Map a section to a specific address."),
- cl::ZeroOrMore);
+ 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);
/* *** */
// explicit cache flush, otherwise JIT code manipulations (like resolved
// relocations) will get to the data cache but not to the instruction cache.
virtual void invalidateInstructionCache();
+
+ void addDummySymbol(const std::string &Name, uint64_t Addr) {
+ DummyExterns[Name] = Addr;
+ }
+
+ RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) override {
+ auto I = DummyExterns.find(Name);
+
+ if (I != DummyExterns.end())
+ return RuntimeDyld::SymbolInfo(I->second, JITSymbolFlags::Exported);
+
+ return RTDyldMemoryManager::findSymbol(Name);
+ }
+
+ void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
+ size_t Size) override {}
+ void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr,
+ size_t Size) override {}
+private:
+ std::map<std::string, uint64_t> DummyExterns;
};
uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
/* *** */
-static int printLineInfoForInput() {
+static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
+ assert(LoadObjects || !UseDebugObj);
+
// Load any dylibs requested on the command line.
loadDylibs();
for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
// Instantiate a dynamic linker.
TrivialMemoryManager MemMgr;
- RuntimeDyld Dyld(&MemMgr);
+ RuntimeDyld Dyld(MemMgr, MemMgr);
// Load the input memory buffer.
ObjectFile &Obj = **MaybeObj;
- // Load the object file
- std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo =
- Dyld.loadObject(Obj);
+ 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())
- return Error(Dyld.getErrorString());
+ if (Dyld.hasError())
+ return Error(Dyld.getErrorString());
- // Resolve all the relocations we can.
- Dyld.resolveRelocations();
+ // Resolve all the relocations we can.
+ Dyld.resolveRelocations();
- OwningBinary<ObjectFile> DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
+ if (UseDebugObj) {
+ DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
+ SymbolObj = DebugObj.getBinary();
+ }
+ }
std::unique_ptr<DIContext> Context(
- DIContext::getDWARFContext(*DebugObj.getBinary()));
+ new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get()));
+
+ std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
+ object::computeSymbolSizes(*SymbolObj);
// Use symbol info to iterate functions in the object.
- for (object::symbol_iterator I = DebugObj.getBinary()->symbol_begin(),
- E = DebugObj.getBinary()->symbol_end();
- I != E; ++I) {
- object::SymbolRef::Type SymType;
- if (I->getType(SymType)) continue;
- if (SymType == object::SymbolRef::ST_Function) {
- StringRef Name;
- uint64_t Addr;
- uint64_t Size;
- if (I->getName(Name)) continue;
- if (I->getAddress(Addr)) continue;
- if (I->getSize(Size)) continue;
-
- outs() << "Function: " << Name << ", Size = " << Size << "\n";
+ for (const auto &P : SymAddr) {
+ object::SymbolRef Sym = P.first;
+ if (Sym.getType() == object::SymbolRef::ST_Function) {
+ ErrorOr<StringRef> Name = Sym.getName();
+ if (!Name)
+ continue;
+ ErrorOr<uint64_t> AddrOrErr = Sym.getAddress();
+ if (!AddrOrErr)
+ 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) {
+ object::section_iterator Sec(SymbolObj->section_end());
+ Sym.getSection(Sec);
+ StringRef SecName;
+ Sec->getName(SecName);
+ uint64_t SectionLoadAddress =
+ LoadedObjInfo->getSectionLoadAddress(SecName);
+ if (SectionLoadAddress != 0)
+ Addr += SectionLoadAddress - Sec->getAddress();
+ }
+
+ outs() << "Function: " << *Name << ", Size = " << Size
+ << ", Addr = " << Addr << "\n";
DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
DILineInfoTable::iterator Begin = Lines.begin();
// Instantiate a dynamic linker.
TrivialMemoryManager MemMgr;
- RuntimeDyld Dyld(&MemMgr);
+ RuntimeDyld Dyld(MemMgr, MemMgr);
+
+ // FIXME: Preserve buffers until resolveRelocations time to work around a bug
+ // in RuntimeDyldELF.
+ // This fixme should be fixed ASAP. This is a very brittle workaround.
+ std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
// If we don't have any input files, read from stdin.
if (!InputFileList.size())
return Error("unable to create object file: '" + EC.message() + "'");
ObjectFile &Obj = **MaybeObj;
+ InputBuffers.push_back(std::move(*InputBuffer));
// Load the object file
Dyld.loadObject(Obj);
// FIXME: Error out if there are unresolved relocations.
// Get the address of the entry point (_main by default).
- void *MainAddress = Dyld.getSymbolAddress(EntryPoint);
+ void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
if (!MainAddress)
return Error("no definition for '" + EntryPoint + "'");
for (StringRef Mapping : SpecificSectionMappings) {
size_t EqualsIdx = Mapping.find_first_of("=");
- StringRef SectionIDStr = Mapping.substr(0, EqualsIdx);
+ std::string SectionIDStr = Mapping.substr(0, EqualsIdx);
size_t ComaIdx = Mapping.find_first_of(",");
if (ComaIdx == StringRef::npos) {
exit(1);
}
- StringRef FileName = SectionIDStr.substr(0, ComaIdx);
- StringRef SectionName = SectionIDStr.substr(ComaIdx + 1);
+ std::string FileName = SectionIDStr.substr(0, ComaIdx);
+ std::string SectionName = SectionIDStr.substr(ComaIdx + 1);
uint64_t OldAddrInt;
std::string ErrorMsg;
void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt));
- StringRef NewAddrStr = Mapping.substr(EqualsIdx + 1);
+ std::string NewAddrStr = Mapping.substr(EqualsIdx + 1);
uint64_t NewAddr;
- if (NewAddrStr.getAsInteger(0, NewAddr)) {
- errs() << "Invalid section address in mapping: " << Mapping << "\n";
+ if (StringRef(NewAddrStr).getAsInteger(0, NewAddr)) {
+ errs() << "Invalid section address in mapping '" << Mapping << "'.\n";
exit(1);
}
// Defaults to zero. Set to something big
// (e.g. 1 << 32) to stress-test stubs, GOTs, etc.
//
-static void remapSections(const llvm::Triple &TargetTriple,
- const TrivialMemoryManager &MemMgr,
- RuntimeDyldChecker &Checker) {
+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;
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) {
+ errs() << "Invalid dummy symbol specification '" << Mapping
+ << "'. Should be '<symbol name>=<addr>'\n";
+ exit(1);
+ }
+
+ std::string Symbol = Mapping.substr(0, EqualsIdx);
+ std::string AddrStr = Mapping.substr(EqualsIdx + 1);
+
+ uint64_t Addr;
+ if (StringRef(AddrStr).getAsInteger(0, Addr)) {
+ errs() << "Invalid symbol mapping '" << Mapping << "'.\n";
+ exit(1);
+ }
+
+ MemMgr.addDummySymbol(Symbol, Addr);
+ }
}
// Load and link the objects specified on the command line, but do not execute
TripleName = TheTriple.getTriple();
std::unique_ptr<MCSubtargetInfo> STI(
- TheTarget->createMCSubtargetInfo(TripleName, "", ""));
+ TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
assert(STI && "Unable to create subtarget info!");
std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
std::unique_ptr<MCInstPrinter> InstPrinter(
- TheTarget->createMCInstPrinter(0, *MAI, *MII, *MRI, *STI));
+ TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));
// Load any dylibs requested on the command line.
loadDylibs();
// Instantiate a dynamic linker.
TrivialMemoryManager MemMgr;
- RuntimeDyld Dyld(&MemMgr);
+ RuntimeDyld Dyld(MemMgr, MemMgr);
Dyld.setProcessAllSections(true);
RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
llvm::dbgs());
+ // FIXME: Preserve buffers until resolveRelocations time to work around a bug
+ // in RuntimeDyldELF.
+ // This fixme should be fixed ASAP. This is a very brittle workaround.
+ std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
+
// If we don't have any input files, read from stdin.
if (!InputFileList.size())
InputFileList.push_back("-");
return Error("unable to create object file: '" + EC.message() + "'");
ObjectFile &Obj = **MaybeObj;
+ InputBuffers.push_back(std::move(*InputBuffer));
// Load the object file
Dyld.loadObject(Obj);
}
}
- // Re-map the section addresses into the phony target address space.
- remapSections(TheTriple, MemMgr, Checker);
+ // 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();
switch (Action) {
case AC_Execute:
return executeInput();
+ case AC_PrintDebugLineInfo:
+ return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */ true);
case AC_PrintLineInfo:
- return printLineInfoForInput();
+ return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */false);
+ case AC_PrintObjectLineInfo:
+ return printLineInfoForInput(/* LoadObjects */false,/* UseDebugObj */false);
case AC_Verify:
return linkAndVerify();
}
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