#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/ExecutionEngine/JITMemoryManager.h"
#include "llvm/ExecutionEngine/MCJIT.h"
+#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/IRReader.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MathExtras.h"
#include <cerrno>
-#ifdef __linux__
-// These includes used by LLIMCJITMemoryManager::getPointerToNamedFunction()
-// for Glibc trickery. Look comments in this function for more information.
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#include <fcntl.h>
-#include <unistd.h>
-#endif
-
#ifdef __CYGWIN__
#include <cygwin/version.h>
#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
#endif
}
-// Memory manager for MCJIT
-class LLIMCJITMemoryManager : public JITMemoryManager {
-public:
- SmallVector<sys::MemoryBlock, 16> AllocatedDataMem;
- SmallVector<sys::MemoryBlock, 16> AllocatedCodeMem;
- SmallVector<sys::MemoryBlock, 16> FreeCodeMem;
-
- LLIMCJITMemoryManager() { }
- ~LLIMCJITMemoryManager();
-
- virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
- unsigned SectionID);
-
- virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
- unsigned SectionID, bool IsReadOnly);
-
- virtual void *getPointerToNamedFunction(const std::string &Name,
- bool AbortOnFailure = true);
-
- virtual bool applyPermissions(std::string *ErrMsg) { return false; }
-
- // Invalidate instruction cache for code sections. 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();
-
- // The RTDyldMemoryManager doesn't use the following functions, so we don't
- // need implement them.
- virtual void setMemoryWritable() {
- llvm_unreachable("Unexpected call!");
- }
- virtual void setMemoryExecutable() {
- llvm_unreachable("Unexpected call!");
- }
- virtual void setPoisonMemory(bool poison) {
- llvm_unreachable("Unexpected call!");
- }
- virtual void AllocateGOT() {
- llvm_unreachable("Unexpected call!");
- }
- virtual uint8_t *getGOTBase() const {
- llvm_unreachable("Unexpected call!");
- return 0;
- }
- virtual uint8_t *startFunctionBody(const Function *F,
- uintptr_t &ActualSize){
- llvm_unreachable("Unexpected call!");
- return 0;
- }
- virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
- unsigned Alignment) {
- llvm_unreachable("Unexpected call!");
- return 0;
- }
- virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart,
- uint8_t *FunctionEnd) {
- llvm_unreachable("Unexpected call!");
- }
- virtual uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) {
- llvm_unreachable("Unexpected call!");
- return 0;
- }
- virtual uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) {
- llvm_unreachable("Unexpected call!");
- return 0;
- }
- virtual void deallocateFunctionBody(void *Body) {
- llvm_unreachable("Unexpected call!");
- }
- virtual uint8_t* startExceptionTable(const Function* F,
- uintptr_t &ActualSize) {
- llvm_unreachable("Unexpected call!");
- return 0;
- }
- virtual void endExceptionTable(const Function *F, uint8_t *TableStart,
- uint8_t *TableEnd, uint8_t* FrameRegister) {
- llvm_unreachable("Unexpected call!");
- }
- virtual void deallocateExceptionTable(void *ET) {
- llvm_unreachable("Unexpected call!");
- }
-};
-
-uint8_t *LLIMCJITMemoryManager::allocateDataSection(uintptr_t Size,
- unsigned Alignment,
- unsigned SectionID,
- bool IsReadOnly) {
- if (!Alignment)
- Alignment = 16;
- // Ensure that enough memory is requested to allow aligning.
- size_t NumElementsAligned = 1 + (Size + Alignment - 1)/Alignment;
- uint8_t *Addr = (uint8_t*)calloc(NumElementsAligned, Alignment);
-
- // Honour the alignment requirement.
- uint8_t *AlignedAddr = (uint8_t*)RoundUpToAlignment((uint64_t)Addr, Alignment);
-
- // Store the original address from calloc so we can free it later.
- AllocatedDataMem.push_back(sys::MemoryBlock(Addr, NumElementsAligned*Alignment));
- return AlignedAddr;
-}
-
-uint8_t *LLIMCJITMemoryManager::allocateCodeSection(uintptr_t Size,
- unsigned Alignment,
- unsigned SectionID) {
- if (!Alignment)
- Alignment = 16;
- unsigned NeedAllocate = Alignment * ((Size + Alignment - 1)/Alignment + 1);
- uintptr_t Addr = 0;
- // Look in the list of free code memory regions and use a block there if one
- // is available.
- for (int i = 0, e = FreeCodeMem.size(); i != e; ++i) {
- sys::MemoryBlock &MB = FreeCodeMem[i];
- if (MB.size() >= NeedAllocate) {
- Addr = (uintptr_t)MB.base();
- uintptr_t EndOfBlock = Addr + MB.size();
- // Align the address.
- Addr = (Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1);
- // Store cutted free memory block.
- FreeCodeMem[i] = sys::MemoryBlock((void*)(Addr + Size),
- EndOfBlock - Addr - Size);
- return (uint8_t*)Addr;
- }
- }
-
- // No pre-allocated free block was large enough. Allocate a new memory region.
- sys::MemoryBlock MB = sys::Memory::AllocateRWX(NeedAllocate, 0, 0);
-
- AllocatedCodeMem.push_back(MB);
- Addr = (uintptr_t)MB.base();
- uintptr_t EndOfBlock = Addr + MB.size();
- // Align the address.
- Addr = (Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1);
- // The AllocateRWX may allocate much more memory than we need. In this case,
- // we store the unused memory as a free memory block.
- unsigned FreeSize = EndOfBlock-Addr-Size;
- if (FreeSize > 16)
- FreeCodeMem.push_back(sys::MemoryBlock((void*)(Addr + Size), FreeSize));
-
- // Return aligned address
- return (uint8_t*)Addr;
-}
-
-void LLIMCJITMemoryManager::invalidateInstructionCache() {
- for (int i = 0, e = AllocatedCodeMem.size(); i != e; ++i)
- sys::Memory::InvalidateInstructionCache(AllocatedCodeMem[i].base(),
- AllocatedCodeMem[i].size());
-}
-
-static int jit_noop() {
- return 0;
-}
-
-void *LLIMCJITMemoryManager::getPointerToNamedFunction(const std::string &Name,
- bool AbortOnFailure) {
-#if defined(__linux__)
- //===--------------------------------------------------------------------===//
- // Function stubs that are invoked instead of certain library calls
- //
- // Force the following functions to be linked in to anything that uses the
- // JIT. This is a hack designed to work around the all-too-clever Glibc
- // strategy of making these functions work differently when inlined vs. when
- // not inlined, and hiding their real definitions in a separate archive file
- // that the dynamic linker can't see. For more info, search for
- // 'libc_nonshared.a' on Google, or read http://llvm.org/PR274.
- if (Name == "stat") return (void*)(intptr_t)&stat;
- if (Name == "fstat") return (void*)(intptr_t)&fstat;
- if (Name == "lstat") return (void*)(intptr_t)&lstat;
- if (Name == "stat64") return (void*)(intptr_t)&stat64;
- if (Name == "fstat64") return (void*)(intptr_t)&fstat64;
- if (Name == "lstat64") return (void*)(intptr_t)&lstat64;
- if (Name == "atexit") return (void*)(intptr_t)&atexit;
- if (Name == "mknod") return (void*)(intptr_t)&mknod;
-#endif // __linux__
-
- // We should not invoke parent's ctors/dtors from generated main()!
- // On Mingw and Cygwin, the symbol __main is resolved to
- // callee's(eg. tools/lli) one, to invoke wrong duplicated ctors
- // (and register wrong callee's dtors with atexit(3)).
- // We expect ExecutionEngine::runStaticConstructorsDestructors()
- // is called before ExecutionEngine::runFunctionAsMain() is called.
- if (Name == "__main") return (void*)(intptr_t)&jit_noop;
-
- const char *NameStr = Name.c_str();
- void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
- if (Ptr) return Ptr;
-
- // If it wasn't found and if it starts with an underscore ('_') character,
- // try again without the underscore.
- if (NameStr[0] == '_') {
- Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
- if (Ptr) return Ptr;
- }
-
- if (AbortOnFailure)
- report_fatal_error("Program used external function '" + Name +
- "' which could not be resolved!");
- return 0;
-}
-
-LLIMCJITMemoryManager::~LLIMCJITMemoryManager() {
- for (unsigned i = 0, e = AllocatedCodeMem.size(); i != e; ++i)
- sys::Memory::ReleaseRWX(AllocatedCodeMem[i]);
- for (unsigned i = 0, e = AllocatedDataMem.size(); i != e; ++i)
- free(AllocatedDataMem[i].base());
-}
-
-
void layoutRemoteTargetMemory(RemoteTarget *T, RecordingMemoryManager *JMM) {
// Lay out our sections in order, with all the code sections first, then
// all the data sections.
if (RemoteMCJIT)
JMM = new RecordingMemoryManager();
else
- JMM = new LLIMCJITMemoryManager();
+ JMM = new SectionMemoryManager();
builder.setJITMemoryManager(JMM);
} else {
if (RemoteMCJIT) {
// MCJIT itself. FIXME.
//
// Run static constructors.
- if (!RemoteMCJIT)
- EE->runStaticConstructorsDestructors(false);
+ if (!RemoteMCJIT) {
+ if (UseMCJIT && !ForceInterpreter) {
+ // Give MCJIT a chance to apply relocations and set page permissions.
+ EE->finalizeObject();
+ }
+ EE->runStaticConstructorsDestructors(false);
+ }
if (NoLazyCompilation) {
for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) {
(void)EE->getPointerToFunction(EntryFn);
// Clear instruction cache before code will be executed.
if (JMM)
- static_cast<LLIMCJITMemoryManager*>(JMM)->invalidateInstructionCache();
+ static_cast<SectionMemoryManager*>(JMM)->invalidateInstructionCache();
// Run main.
Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
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