//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/OwningPtr.h"
+#include "llvm/DebugInfo/DIContext.h"
+#include "llvm/ExecutionEngine/ObjectBuffer.h"
+#include "llvm/ExecutionEngine/ObjectImage.h"
#include "llvm/ExecutionEngine/RuntimeDyld.h"
-#include "llvm/Object/MachOObject.h"
+#include "llvm/Object/MachO.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Memory.h"
#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/system_error.h"
+#include <system_error>
using namespace llvm;
using namespace llvm::object;
+using std::error_code;
-static cl::opt<std::string>
-InputFile(cl::Positional, cl::desc("<input file>"), cl::init("-"));
+static cl::list<std::string>
+InputFileList(cl::Positional, cl::ZeroOrMore,
+ cl::desc("<input file>"));
enum ActionType {
- AC_Execute
+ AC_Execute,
+ AC_PrintLineInfo
};
static cl::opt<ActionType>
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."),
clEnumValEnd));
+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);
+
/* *** */
+// 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; }
+
+ // Invalidate instruction cache for sections with execute permissions.
+ // Some platforms with separate data cache and instruction cache require
+ // 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();
+};
+
+uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
+ unsigned Alignment,
+ unsigned SectionID,
+ StringRef SectionName) {
+ sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, nullptr);
+ FunctionMemory.push_back(MB);
+ return (uint8_t*)MB.base();
+}
+
+uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size,
+ unsigned Alignment,
+ unsigned SectionID,
+ StringRef SectionName,
+ bool IsReadOnly) {
+ sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, nullptr);
+ DataMemory.push_back(MB);
+ return (uint8_t*)MB.base();
+}
+
+void TrivialMemoryManager::invalidateInstructionCache() {
+ for (int i = 0, e = FunctionMemory.size(); i != e; ++i)
+ sys::Memory::InvalidateInstructionCache(FunctionMemory[i].base(),
+ FunctionMemory[i].size());
+
+ for (int i = 0, e = DataMemory.size(); i != e; ++i)
+ sys::Memory::InvalidateInstructionCache(DataMemory[i].base(),
+ DataMemory[i].size());
+}
+
static const char *ProgramName;
static void Message(const char *Type, const Twine &Msg) {
return 1;
}
+static void loadDylibs() {
+ for (const std::string &Dylib : Dylibs) {
+ if (sys::fs::is_regular_file(Dylib)) {
+ std::string ErrMsg;
+ if (sys::DynamicLibrary::LoadLibraryPermanently(Dylib.c_str(), &ErrMsg))
+ llvm::errs() << "Error loading '" << Dylib << "': "
+ << ErrMsg << "\n";
+ } else
+ llvm::errs() << "Dylib not found: '" << Dylib << "'.\n";
+ }
+}
+
+
/* *** */
+static int printLineInfoForInput() {
+ // 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(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
+ // Instantiate a dynamic linker.
+ TrivialMemoryManager MemMgr;
+ RuntimeDyld Dyld(&MemMgr);
+
+ // Load the input memory buffer.
+ std::unique_ptr<MemoryBuffer> InputBuffer;
+ std::unique_ptr<ObjectImage> LoadedObject;
+ if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFileList[i],
+ InputBuffer))
+ return Error("unable to read input: '" + ec.message() + "'");
+
+ // Load the object file
+ LoadedObject.reset(Dyld.loadObject(new ObjectBuffer(InputBuffer.release())));
+ if (!LoadedObject) {
+ return Error(Dyld.getErrorString());
+ }
+
+ // Resolve all the relocations we can.
+ Dyld.resolveRelocations();
+
+ std::unique_ptr<DIContext> Context(
+ DIContext::getDWARFContext(LoadedObject->getObjectFile()));
+
+ // Use symbol info to iterate functions in the object.
+ for (object::symbol_iterator I = LoadedObject->begin_symbols(),
+ E = LoadedObject->end_symbols();
+ 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";
+
+ DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
+ DILineInfoTable::iterator Begin = Lines.begin();
+ DILineInfoTable::iterator End = Lines.end();
+ for (DILineInfoTable::iterator It = Begin; It != End; ++It) {
+ outs() << " Line info @ " << It->first - Addr << ": "
+ << It->second.FileName << ", line:" << It->second.Line << "\n";
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
static int executeInput() {
- // Load the input memory buffer.
- OwningPtr<MemoryBuffer> InputBuffer;
- if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFile, InputBuffer))
- return Error("unable to read input: '" + ec.message() + "'");
+ // Load any dylibs requested on the command line.
+ loadDylibs();
// Instantiate a dynamic linker.
- RuntimeDyld Dyld;
+ TrivialMemoryManager MemMgr;
+ RuntimeDyld Dyld(&MemMgr);
+
+ // If we don't have any input files, read from stdin.
+ if (!InputFileList.size())
+ InputFileList.push_back("-");
+ for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
+ // Load the input memory buffer.
+ std::unique_ptr<MemoryBuffer> InputBuffer;
+ std::unique_ptr<ObjectImage> LoadedObject;
+ if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFileList[i],
+ InputBuffer))
+ return Error("unable to read input: '" + ec.message() + "'");
+
+ // Load the object file
+ LoadedObject.reset(Dyld.loadObject(new ObjectBuffer(InputBuffer.release())));
+ if (!LoadedObject) {
+ return Error(Dyld.getErrorString());
+ }
+ }
- // Load the object file into it.
- if (Dyld.loadObject(InputBuffer.take()))
- return true;
+ // Resolve all the relocations we can.
+ Dyld.resolveRelocations();
+ // Clear instruction cache before code will be executed.
+ MemMgr.invalidateInstructionCache();
- // Get the address of "_main".
- void *MainAddress = Dyld.getSymbolAddress("_main");
- if (MainAddress == 0)
- return Error("no definition for '_main'");
+ // FIXME: Error out if there are unresolved relocations.
- // Invalidate the instruction cache.
- sys::MemoryBlock Data = Dyld.getMemoryBlock();
- sys::Memory::InvalidateInstructionCache(Data.base(), Data.size());
+ // Get the address of the entry point (_main by default).
+ void *MainAddress = Dyld.getSymbolAddress(EntryPoint);
+ if (!MainAddress)
+ return Error("no definition for '" + EntryPoint + "'");
- // Make sure the memory is executable.
- std::string ErrorStr;
- if (!sys::Memory::setExecutable(Data, &ErrorStr))
- return Error("unable to mark function executable: '" + ErrorStr + "'");
+ // Invalidate the instruction cache for each loaded function.
+ for (unsigned i = 0, e = MemMgr.FunctionMemory.size(); i != e; ++i) {
+ sys::MemoryBlock &Data = MemMgr.FunctionMemory[i];
+ // Make sure the memory is executable.
+ std::string ErrorStr;
+ sys::Memory::InvalidateInstructionCache(Data.base(), Data.size());
+ if (!sys::Memory::setExecutable(Data, &ErrorStr))
+ return Error("unable to mark function executable: '" + ErrorStr + "'");
+ }
// Dispatch to _main().
- errs() << "loaded '_main' at: " << MainAddress << "\n";
+ 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];
- Argv[0] = InputFile.c_str();
- Argv[1] = 0;
+ // 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);
}
int main(int argc, char **argv) {
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+
ProgramName = argv[0];
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "llvm MC-JIT tool\n");
switch (Action) {
- default:
case AC_Execute:
return executeInput();
+ case AC_PrintLineInfo:
+ return printLineInfoForInput();
}
-
- return 0;
}
projects / oota-llvm.git / blobdiff