[llvm-commits] [llvm] r163216 - in /llvm/trunk/tools/lli: RecordingMemoryManager.cpp RecordingMemoryManager.h RemoteTarget.cpp RemoteTarget.h lli.cpp
Jim Grosbach
grosbach at apple.com
Wed Sep 5 09:50:34 PDT 2012
Author: grosbach
Date: Wed Sep 5 11:50:34 2012
New Revision: 163216
URL: http://llvm.org/viewvc/llvm-project?rev=163216&view=rev
Log:
MCJIT: Add faux remote target execution to lli for the MCJIT.
Simulate a remote target address space by allocating a seperate chunk of
memory for the target and re-mapping section addresses to that prior to
execution. Later we'll want to have a truly remote process, but for now
this gets us closer to being able to test the remote target
functionality outside LLDB.
rdar://12157052
Added:
llvm/trunk/tools/lli/RecordingMemoryManager.cpp
llvm/trunk/tools/lli/RecordingMemoryManager.h
llvm/trunk/tools/lli/RemoteTarget.cpp
llvm/trunk/tools/lli/RemoteTarget.h
Modified:
llvm/trunk/tools/lli/lli.cpp
Added: llvm/trunk/tools/lli/RecordingMemoryManager.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lli/RecordingMemoryManager.cpp?rev=163216&view=auto
==============================================================================
--- llvm/trunk/tools/lli/RecordingMemoryManager.cpp (added)
+++ llvm/trunk/tools/lli/RecordingMemoryManager.cpp Wed Sep 5 11:50:34 2012
@@ -0,0 +1,87 @@
+//===- RecordingMemoryManager.cpp - Recording memory manager --------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This memory manager allocates local storage and keeps a record of each
+// allocation. Iterators are provided for all data and code allocations.
+//
+//===----------------------------------------------------------------------===//
+
+#include "RecordingMemoryManager.h"
+using namespace llvm;
+
+uint8_t *RecordingMemoryManager::
+allocateCodeSection(uintptr_t Size, unsigned Alignment, unsigned SectionID) {
+ // The recording memory manager is just a local copy of the remote target.
+ // The alignment requirement is just stored here for later use. Regular
+ // heap storage is sufficient here.
+ void *Addr = malloc(Size);
+ assert(Addr && "malloc() failure!");
+ sys::MemoryBlock Block(Addr, Size);
+ AllocatedCodeMem.push_back(Allocation(Block, Alignment));
+ return (uint8_t*)Addr;
+}
+
+uint8_t *RecordingMemoryManager::
+allocateDataSection(uintptr_t Size, unsigned Alignment, unsigned SectionID) {
+ // The recording memory manager is just a local copy of the remote target.
+ // The alignment requirement is just stored here for later use. Regular
+ // heap storage is sufficient here.
+ void *Addr = malloc(Size);
+ assert(Addr && "malloc() failure!");
+ sys::MemoryBlock Block(Addr, Size);
+ AllocatedDataMem.push_back(Allocation(Block, Alignment));
+ return (uint8_t*)Addr;
+}
+void RecordingMemoryManager::setMemoryWritable() { llvm_unreachable("Unexpected!"); }
+void RecordingMemoryManager::setMemoryExecutable() { llvm_unreachable("Unexpected!"); }
+void RecordingMemoryManager::setPoisonMemory(bool poison) { llvm_unreachable("Unexpected!"); }
+void RecordingMemoryManager::AllocateGOT() { llvm_unreachable("Unexpected!"); }
+uint8_t *RecordingMemoryManager::getGOTBase() const {
+ llvm_unreachable("Unexpected!");
+ return 0;
+}
+uint8_t *RecordingMemoryManager::startFunctionBody(const Function *F, uintptr_t &ActualSize){
+ llvm_unreachable("Unexpected!");
+ return 0;
+}
+uint8_t *RecordingMemoryManager::allocateStub(const GlobalValue* F, unsigned StubSize,
+ unsigned Alignment) {
+ llvm_unreachable("Unexpected!");
+ return 0;
+}
+void RecordingMemoryManager::endFunctionBody(const Function *F, uint8_t *FunctionStart,
+ uint8_t *FunctionEnd) {
+ llvm_unreachable("Unexpected!");
+}
+uint8_t *RecordingMemoryManager::allocateSpace(intptr_t Size, unsigned Alignment) {
+ llvm_unreachable("Unexpected!");
+ return 0;
+}
+uint8_t *RecordingMemoryManager::allocateGlobal(uintptr_t Size, unsigned Alignment) {
+ llvm_unreachable("Unexpected!");
+ return 0;
+}
+void RecordingMemoryManager::deallocateFunctionBody(void *Body) {
+ llvm_unreachable("Unexpected!");
+}
+uint8_t* RecordingMemoryManager::startExceptionTable(const Function* F, uintptr_t &ActualSize) {
+ llvm_unreachable("Unexpected!");
+ return 0;
+}
+void RecordingMemoryManager::endExceptionTable(const Function *F, uint8_t *TableStart,
+ uint8_t *TableEnd, uint8_t* FrameRegister) {
+ llvm_unreachable("Unexpected!");
+}
+void RecordingMemoryManager::deallocateExceptionTable(void *ET) {
+ llvm_unreachable("Unexpected!");
+}
+void *RecordingMemoryManager::getPointerToNamedFunction(const std::string &Name,
+ bool AbortOnFailure) {
+ return NULL;
+}
Added: llvm/trunk/tools/lli/RecordingMemoryManager.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lli/RecordingMemoryManager.h?rev=163216&view=auto
==============================================================================
--- llvm/trunk/tools/lli/RecordingMemoryManager.h (added)
+++ llvm/trunk/tools/lli/RecordingMemoryManager.h Wed Sep 5 11:50:34 2012
@@ -0,0 +1,78 @@
+//===- RecordingMemoryManager.h - LLI MCJIT recording memory manager ------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This memory manager allocates local storage and keeps a record of each
+// allocation. Iterators are provided for all data and code allocations.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef RECORDINGMEMORYMANAGER_H
+#define RECORDINGMEMORYMANAGER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ExecutionEngine/JITMemoryManager.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Memory.h"
+#include <utility>
+
+namespace llvm {
+
+class RecordingMemoryManager : public JITMemoryManager {
+public:
+ typedef std::pair<sys::MemoryBlock, unsigned> Allocation;
+
+private:
+ SmallVector<Allocation, 16> AllocatedDataMem;
+ SmallVector<Allocation, 16> AllocatedCodeMem;
+
+public:
+ RecordingMemoryManager() {}
+ virtual ~RecordingMemoryManager() {}
+
+ typedef SmallVectorImpl<Allocation>::const_iterator const_data_iterator;
+ typedef SmallVectorImpl<Allocation>::const_iterator const_code_iterator;
+
+ const_data_iterator data_begin() const { return AllocatedDataMem.begin(); }
+ const_data_iterator data_end() const { return AllocatedDataMem.end(); }
+ const_code_iterator code_begin() const { return AllocatedCodeMem.begin(); }
+ const_code_iterator code_end() const { return AllocatedCodeMem.end(); }
+
+ uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+ unsigned SectionID);
+
+ uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+ unsigned SectionID);
+
+ void *getPointerToNamedFunction(const std::string &Name,
+ bool AbortOnFailure = true);
+ // The following obsolete JITMemoryManager calls are stubbed out for
+ // this model.
+ void setMemoryWritable();
+ void setMemoryExecutable();
+ void setPoisonMemory(bool poison);
+ void AllocateGOT();
+ uint8_t *getGOTBase() const;
+ uint8_t *startFunctionBody(const Function *F, uintptr_t &ActualSize);
+ uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
+ unsigned Alignment);
+ void endFunctionBody(const Function *F, uint8_t *FunctionStart,
+ uint8_t *FunctionEnd);
+ uint8_t *allocateSpace(intptr_t Size, unsigned Alignment);
+ uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment);
+ void deallocateFunctionBody(void *Body);
+ uint8_t* startExceptionTable(const Function* F, uintptr_t &ActualSize);
+ void endExceptionTable(const Function *F, uint8_t *TableStart,
+ uint8_t *TableEnd, uint8_t* FrameRegister);
+ void deallocateExceptionTable(void *ET);
+
+};
+
+} // end namespace llvm
+
+#endif
Added: llvm/trunk/tools/lli/RemoteTarget.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lli/RemoteTarget.cpp?rev=163216&view=auto
==============================================================================
--- llvm/trunk/tools/lli/RemoteTarget.cpp (added)
+++ llvm/trunk/tools/lli/RemoteTarget.cpp Wed Sep 5 11:50:34 2012
@@ -0,0 +1,61 @@
+//===- RemoteTarget.cpp - LLVM Remote process JIT execution --------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implementation of the RemoteTarget class which executes JITed code in a
+// separate address range from where it was built.
+//
+//===----------------------------------------------------------------------===//
+
+#include "RemoteTarget.h"
+#include <llvm/ADT/StringRef.h>
+#include <llvm/Support/Memory.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string>
+using namespace llvm;
+
+bool RemoteTarget::allocateSpace(size_t Size, unsigned Alignment,
+ uint64_t &Address) {
+ sys::MemoryBlock *Prev = Allocations.size() ? &Allocations.back() : NULL;
+ sys::MemoryBlock Mem = sys::Memory::AllocateRWX(Size, Prev, &ErrorMsg);
+ if (Mem.base() == NULL)
+ return true;
+ if ((uintptr_t)Mem.base() % Alignment) {
+ ErrorMsg = "unable to allocate sufficiently aligned memory";
+ return true;
+ }
+ Address = reinterpret_cast<uint64_t>(Mem.base());
+ return false;
+}
+
+bool RemoteTarget::loadData(uint64_t Address, const void *Data, size_t Size) {
+ memcpy ((void*)Address, Data, Size);
+ sys::MemoryBlock Mem((void*)Address, Size);
+ sys::Memory::setExecutable(Mem, &ErrorMsg);
+ return false;
+}
+
+bool RemoteTarget::loadCode(uint64_t Address, const void *Data, size_t Size) {
+ memcpy ((void*)Address, Data, Size);
+ return false;
+}
+
+bool RemoteTarget::executeCode(uint64_t Address, int &RetVal) {
+ int (*fn)(void) = (int(*)(void))Address;
+ RetVal = fn();
+ return false;
+}
+
+void RemoteTarget::create() {
+}
+
+void RemoteTarget::stop() {
+ for (unsigned i = 0, e = Allocations.size(); i != e; ++i)
+ sys::Memory::ReleaseRWX(Allocations[i]);
+}
Added: llvm/trunk/tools/lli/RemoteTarget.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lli/RemoteTarget.h?rev=163216&view=auto
==============================================================================
--- llvm/trunk/tools/lli/RemoteTarget.h (added)
+++ llvm/trunk/tools/lli/RemoteTarget.h Wed Sep 5 11:50:34 2012
@@ -0,0 +1,101 @@
+//===- RemoteTarget.h - LLVM Remote process JIT execution ----------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Definition of the RemoteTarget class which executes JITed code in a
+// separate address range from where it was built.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef REMOTEPROCESS_H
+#define REMOTEPROCESS_H
+
+#include <llvm/ADT/StringRef.h>
+#include <llvm/ADT/SmallVector.h>
+#include <llvm/Support/Memory.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string>
+
+namespace llvm {
+
+class RemoteTarget {
+ std::string ErrorMsg;
+ bool IsRunning;
+
+ SmallVector<sys::MemoryBlock, 16> Allocations;
+
+public:
+ StringRef getErrorMsg() const { return ErrorMsg; }
+
+ /// Allocate space in the remote target address space.
+ ///
+ /// @param Size Amount of space, in bytes, to allocate.
+ /// @param Alignment Required minimum alignment for allocated space.
+ /// @param[out] Address Remote address of the allocated memory.
+ ///
+ /// @returns False on success. On failure, ErrorMsg is updated with
+ /// descriptive text of the encountered error.
+ bool allocateSpace(size_t Size, unsigned Alignment, uint64_t &Address);
+
+ /// Load data into the target address space.
+ ///
+ /// @param Address Destination address in the target process.
+ /// @param Data Source address in the host process.
+ /// @param Size Number of bytes to copy.
+ ///
+ /// @returns False on success. On failure, ErrorMsg is updated with
+ /// descriptive text of the encountered error.
+ bool loadData(uint64_t Address, const void *Data, size_t Size);
+
+ /// Load code into the target address space and prepare it for execution.
+ ///
+ /// @param Address Destination address in the target process.
+ /// @param Data Source address in the host process.
+ /// @param Size Number of bytes to copy.
+ ///
+ /// @returns False on success. On failure, ErrorMsg is updated with
+ /// descriptive text of the encountered error.
+ bool loadCode(uint64_t Address, const void *Data, size_t Size);
+
+ /// Execute code in the target process. The called function is required
+ /// to be of signature int "(*)(void)".
+ ///
+ /// @param Address Address of the loaded function in the target
+ /// process.
+ /// @param[out] RetVal The integer return value of the called function.
+ ///
+ /// @returns False on success. On failure, ErrorMsg is updated with
+ /// descriptive text of the encountered error.
+ bool executeCode(uint64_t Address, int &RetVal);
+
+ /// Minimum alignment for memory permissions. Used to seperate code and
+ /// data regions to make sure data doesn't get marked as code or vice
+ /// versa.
+ ///
+ /// @returns Page alignment return value. Default of 4k.
+ unsigned getPageAlignment() { return 4096; }
+
+ /// Start the remote process.
+ void create();
+
+ /// Terminate the remote process.
+ void stop();
+
+ RemoteTarget() : ErrorMsg(""), IsRunning(false) {}
+ ~RemoteTarget() { if (IsRunning) stop(); }
+
+private:
+ // Main processing function for the remote target process. Command messages
+ // are received on file descriptor CmdFD and responses come back on OutFD.
+ static void doRemoteTargeting(int CmdFD, int OutFD);
+};
+
+} // end namespace llvm
+
+#endif
Modified: llvm/trunk/tools/lli/lli.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lli/lli.cpp?rev=163216&r1=163215&r2=163216&view=diff
==============================================================================
--- llvm/trunk/tools/lli/lli.cpp (original)
+++ llvm/trunk/tools/lli/lli.cpp Wed Sep 5 11:50:34 2012
@@ -13,6 +13,9 @@
//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "lli"
+#include "RecordingMemoryManager.h"
+#include "RemoteTarget.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
@@ -32,9 +35,11 @@
#include "llvm/Support/PluginLoader.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Format.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/Memory.h"
#include <cerrno>
@@ -73,6 +78,13 @@
"use-mcjit", cl::desc("Enable use of the MC-based JIT (if available)"),
cl::init(false));
+ // The MCJIT supports building for a target address space separate from
+ // the JIT compilation process. Use a forked process and a copying
+ // memory manager with IPC to execute using this functionality.
+ cl::opt<bool> RemoteMCJIT("remote-mcjit",
+ cl::desc("Execute MCJIT'ed code in a separate process."),
+ cl::init(false));
+
// Determine optimization level.
cl::opt<char>
OptLevel("O",
@@ -372,6 +384,79 @@
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.
+ uint64_t CurOffset = 0;
+ unsigned MaxAlign = T->getPageAlignment();
+ SmallVector<std::pair<const void*, uint64_t>, 16> Offsets;
+ SmallVector<unsigned, 16> Sizes;
+ for (RecordingMemoryManager::const_code_iterator I = JMM->code_begin(),
+ E = JMM->code_end();
+ I != E; ++I) {
+ DEBUG(dbgs() << "code region: size " << I->first.size()
+ << ", alignment " << I->second << "\n");
+ // Align the current offset up to whatever is needed for the next
+ // section.
+ unsigned Align = I->second;
+ CurOffset = (CurOffset + Align - 1) / Align * Align;
+ // Save off the address of the new section and allocate its space.
+ Offsets.push_back(std::pair<const void*,uint64_t>(I->first.base(), CurOffset));
+ Sizes.push_back(I->first.size());
+ CurOffset += I->first.size();
+ }
+ // Adjust to keep code and data aligned on seperate pages.
+ CurOffset = (CurOffset + MaxAlign - 1) / MaxAlign * MaxAlign;
+ unsigned FirstDataIndex = Offsets.size();
+ for (RecordingMemoryManager::const_data_iterator I = JMM->data_begin(),
+ E = JMM->data_end();
+ I != E; ++I) {
+ DEBUG(dbgs() << "data region: size " << I->first.size()
+ << ", alignment " << I->second << "\n");
+ // Align the current offset up to whatever is needed for the next
+ // section.
+ unsigned Align = I->second;
+ CurOffset = (CurOffset + Align - 1) / Align * Align;
+ // Save off the address of the new section and allocate its space.
+ Offsets.push_back(std::pair<const void*,uint64_t>(I->first.base(), CurOffset));
+ Sizes.push_back(I->first.size());
+ CurOffset += I->first.size();
+ }
+
+ // Allocate space in the remote target.
+ uint64_t RemoteAddr;
+ if (T->allocateSpace(CurOffset, MaxAlign, RemoteAddr))
+ report_fatal_error(T->getErrorMsg());
+ // Map the section addresses so relocations will get updated in the local
+ // copies of the sections.
+ for (unsigned i = 0, e = Offsets.size(); i != e; ++i) {
+ uint64_t Addr = RemoteAddr + Offsets[i].second;
+ EE->mapSectionAddress(const_cast<void*>(Offsets[i].first), Addr);
+
+ DEBUG(dbgs() << " Mapping local: " << Offsets[i].first
+ << " to remote: " << format("%#018x", Addr) << "\n");
+
+ }
+ // Now load it all to the target.
+ for (unsigned i = 0, e = Offsets.size(); i != e; ++i) {
+ uint64_t Addr = RemoteAddr + Offsets[i].second;
+
+ if (i < FirstDataIndex) {
+ T->loadCode(Addr, Offsets[i].first, Sizes[i]);
+
+ DEBUG(dbgs() << " loading code: " << Offsets[i].first
+ << " to remote: " << format("%#018x", Addr) << "\n");
+ } else {
+ T->loadData(Addr, Offsets[i].first, Sizes[i]);
+
+ DEBUG(dbgs() << " loading data: " << Offsets[i].first
+ << " to remote: " << format("%#018x", Addr) << "\n");
+ }
+
+ }
+}
+
//===----------------------------------------------------------------------===//
// main Driver function
//
@@ -428,12 +513,19 @@
Mod->setTargetTriple(Triple::normalize(TargetTriple));
// Enable MCJIT if desired.
- LLIMCJITMemoryManager *JMM = 0;
+ JITMemoryManager *JMM = 0;
if (UseMCJIT && !ForceInterpreter) {
builder.setUseMCJIT(true);
- JMM = new LLIMCJITMemoryManager();
+ if (RemoteMCJIT)
+ JMM = new RecordingMemoryManager();
+ else
+ JMM = new LLIMCJITMemoryManager();
builder.setJITMemoryManager(JMM);
} else {
+ if (RemoteMCJIT) {
+ errs() << "error: Remote process execution requires -use-mcjit\n";
+ exit(1);
+ }
builder.setJITMemoryManager(ForceInterpreter ? 0 :
JITMemoryManager::CreateDefaultMemManager());
}
@@ -451,11 +543,14 @@
}
builder.setOptLevel(OLvl);
- TargetOptions Options;
- Options.JITExceptionHandling = EnableJITExceptionHandling;
- Options.JITEmitDebugInfo = EmitJitDebugInfo;
- Options.JITEmitDebugInfoToDisk = EmitJitDebugInfoToDisk;
- builder.setTargetOptions(Options);
+ // Remote target execution doesn't handle EH or debug registration.
+ if (!RemoteMCJIT) {
+ TargetOptions Options;
+ Options.JITExceptionHandling = EnableJITExceptionHandling;
+ Options.JITEmitDebugInfo = EmitJitDebugInfo;
+ Options.JITEmitDebugInfoToDisk = EmitJitDebugInfoToDisk;
+ builder.setTargetOptions(Options);
+ }
EE = builder.create();
if (!EE) {
@@ -473,6 +568,10 @@
EE->RegisterJITEventListener(
JITEventListener::createIntelJITEventListener());
+ if (!NoLazyCompilation && RemoteMCJIT) {
+ errs() << "warning: remote mcjit does not support lazy compilation\n";
+ NoLazyCompilation = true;
+ }
EE->DisableLazyCompilation(NoLazyCompilation);
// If the user specifically requested an argv[0] to pass into the program,
@@ -509,8 +608,13 @@
// Reset errno to zero on entry to main.
errno = 0;
+ // Remote target MCJIT doesn't (yet) support static constructors. No reason
+ // it couldn't. This is a limitation of the LLI implemantation, not the
+ // MCJIT itself. FIXME.
+ //
// Run static constructors.
- EE->runStaticConstructorsDestructors(false);
+ if (!RemoteMCJIT)
+ EE->runStaticConstructorsDestructors(false);
if (NoLazyCompilation) {
for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) {
@@ -520,28 +624,66 @@
}
}
- // Clear instruction cache before code will be executed.
- if (JMM)
- JMM->invalidateInstructionCache();
-
- // Run main.
- int Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
-
- // Run static destructors.
- EE->runStaticConstructorsDestructors(true);
-
- // If the program didn't call exit explicitly, we should call it now.
- // This ensures that any atexit handlers get called correctly.
- if (Function *ExitF = dyn_cast<Function>(Exit)) {
- std::vector<GenericValue> Args;
- GenericValue ResultGV;
- ResultGV.IntVal = APInt(32, Result);
- Args.push_back(ResultGV);
- EE->runFunction(ExitF, Args);
- errs() << "ERROR: exit(" << Result << ") returned!\n";
- abort();
+ int Result;
+ if (RemoteMCJIT) {
+ RecordingMemoryManager *MM = static_cast<RecordingMemoryManager*>(JMM);
+ // Everything is prepared now, so lay out our program for the target
+ // address space, assign the section addresses to resolve any relocations,
+ // and send it to the target.
+ RemoteTarget Target;
+ Target.create();
+
+ // Ask for a pointer to the entry function. This triggers the actual
+ // compilation.
+ (void)EE->getPointerToFunction(EntryFn);
+
+ // Enough has been compiled to execute the entry function now, so
+ // layout the target memory.
+ layoutRemoteTargetMemory(&Target, MM);
+
+ // Since we're executing in a (at least simulated) remote address space,
+ // we can't use the ExecutionEngine::runFunctionAsMain(). We have to
+ // grab the function address directly here and tell the remote target
+ // to execute the function.
+ // FIXME: argv and envp handling.
+ uint64_t Entry = (uint64_t)EE->getPointerToFunction(EntryFn);
+
+ DEBUG(dbgs() << "Executing '" << EntryFn->getName() << "' at "
+ << format("%#18x", Entry) << "\n");
+
+ if (Target.executeCode(Entry, Result))
+ errs() << "ERROR: " << Target.getErrorMsg() << "\n";
+
+ Target.stop();
} else {
- errs() << "ERROR: exit defined with wrong prototype!\n";
- abort();
+ // Clear instruction cache before code will be executed.
+ if (JMM)
+ static_cast<LLIMCJITMemoryManager*>(JMM)->invalidateInstructionCache();
+
+ // Run main.
+ Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
+ }
+
+ // Like static constructors, the remote target MCJIT support doesn't handle
+ // this yet. It could. FIXME.
+ if (!RemoteMCJIT) {
+ // Run static destructors.
+ EE->runStaticConstructorsDestructors(true);
+
+ // If the program didn't call exit explicitly, we should call it now.
+ // This ensures that any atexit handlers get called correctly.
+ if (Function *ExitF = dyn_cast<Function>(Exit)) {
+ std::vector<GenericValue> Args;
+ GenericValue ResultGV;
+ ResultGV.IntVal = APInt(32, Result);
+ Args.push_back(ResultGV);
+ EE->runFunction(ExitF, Args);
+ errs() << "ERROR: exit(" << Result << ") returned!\n";
+ abort();
+ } else {
+ errs() << "ERROR: exit defined with wrong prototype!\n";
+ abort();
+ }
}
+ return Result;
}
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