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Add a JITEventListener interface that gets called back when a new function is

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emitted or the machine code for a function is freed.  Chris mentioned that we
may also want a notification when a stub is emitted, but that'll be a future
change.  I intend to use this to tell oprofile where functions are emitted and
what lines correspond to what addresses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74157 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jeffrey Yasskin 2009-06-25 02:04:04 +00:00
parent b6c29d5512
commit df5a7daff9
11 changed files with 602 additions and 172 deletions
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20
include/llvm/ExecutionEngine/ExecutionEngine.h
View File

@ -29,13 +29,14 @@ class Constant;
class Function;
class GlobalVariable;
class GlobalValue;
class Module;
class ModuleProvider;
class TargetData;
class Type;
class MutexGuard;
class JITEventListener;
class JITMemoryManager;
class MachineCodeInfo;
class Module;
class ModuleProvider;
class MutexGuard;
class TargetData;
class Type;
class ExecutionEngineState {
private:
@ -276,7 +277,14 @@ public:
virtual void *getOrEmitGlobalVariable(const GlobalVariable *GV) {
return getPointerToGlobal((GlobalValue*)GV);
}
/// Registers a listener to be called back on various events within
/// the JIT. See JITEventListener.h for more details. Does not
/// take ownership of the argument. The argument may be NULL, in
/// which case these functions do nothing.
virtual void RegisterJITEventListener(JITEventListener *L) {}
virtual void UnregisterJITEventListener(JITEventListener *L) {}
/// DisableLazyCompilation - If called, the JIT will abort if lazy compilation
/// is ever attempted.
void DisableLazyCompilation(bool Disabled = true) {

59
include/llvm/ExecutionEngine/JITEventListener.h Normal file
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@ -0,0 +1,59 @@
//===- JITEventListener.h - Exposes events from JIT compilation -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the JITEventListener interface, which lets users get
// callbacks when significant events happen during the JIT compilation process.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTION_ENGINE_JIT_EVENTLISTENER_H
#define LLVM_EXECUTION_ENGINE_JIT_EVENTLISTENER_H
#include "llvm/Support/DataTypes.h"
namespace llvm {
class Function;
/// Empty for now, but this object will contain all details about the
/// generated machine code that a Listener might care about.
struct JITEvent_EmittedFunctionDetails {
};
/// JITEventListener - This interface is used by the JIT to notify clients about
/// significant events during compilation. For example, we could have
/// implementations for profilers and debuggers that need to know where
/// functions have been emitted.
///
/// Each method defaults to doing nothing, so you only need to override the ones
/// you care about.
class JITEventListener {
public:
JITEventListener() {}
virtual ~JITEventListener(); // Defined in JIT.cpp.
typedef JITEvent_EmittedFunctionDetails EmittedFunctionDetails;
/// NotifyFunctionEmitted - Called after a function has been successfully
/// emitted to memory. The function still has its MachineFunction attached,
/// if you should happen to need that.
virtual void NotifyFunctionEmitted(const Function &F,
void *Code, size_t Size,
const EmittedFunctionDetails &Details) {}
/// NotifyFreeingMachineCode - This is called inside of
/// freeMachineCodeForFunction(), after the global mapping is removed, but
/// before the machine code is returned to the allocator. OldPtr is the
/// address of the machine code.
virtual void NotifyFreeingMachineCode(const Function &F, void *OldPtr) {}
};
JITEventListener *createMacOSJITEventListener();
} // end namespace llvm.
#endif

56
lib/ExecutionEngine/JIT/JIT.cpp
View File

@ -20,8 +20,9 @@
#include "llvm/Instructions.h"
#include "llvm/ModuleProvider.h"
#include "llvm/CodeGen/JITCodeEmitter.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/CodeGen/MachineCodeInfo.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetJITInfo.h"
@ -507,6 +508,40 @@ GenericValue JIT::runFunction(Function *F,
return runFunction(Stub, std::vector<GenericValue>());
}
void JIT::RegisterJITEventListener(JITEventListener *L) {
if (L == NULL)
return;
MutexGuard locked(lock);
EventListeners.push_back(L);
}
void JIT::UnregisterJITEventListener(JITEventListener *L) {
if (L == NULL)
return;
MutexGuard locked(lock);
std::vector<JITEventListener*>::reverse_iterator I=
std::find(EventListeners.rbegin(), EventListeners.rend(), L);
if (I != EventListeners.rend()) {
std::swap(*I, EventListeners.back());
EventListeners.pop_back();
}
}
void JIT::NotifyFunctionEmitted(
const Function &F,
void *Code, size_t Size,
const JITEvent_EmittedFunctionDetails &Details) {
MutexGuard locked(lock);
for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) {
EventListeners[I]->NotifyFunctionEmitted(F, Code, Size, Details);
}
}
void JIT::NotifyFreeingMachineCode(const Function &F, void *OldPtr) {
MutexGuard locked(lock);
for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) {
EventListeners[I]->NotifyFreeingMachineCode(F, OldPtr);
}
}
/// runJITOnFunction - Run the FunctionPassManager full of
/// just-in-time compilation passes on F, hopefully filling in
/// GlobalAddress[F] with the address of F's machine code.
@ -514,11 +549,23 @@ GenericValue JIT::runFunction(Function *F,
void JIT::runJITOnFunction(Function *F, MachineCodeInfo *MCI) {
MutexGuard locked(lock);
registerMachineCodeInfo(MCI);
class MCIListener : public JITEventListener {
MachineCodeInfo *const MCI;
public:
MCIListener(MachineCodeInfo *mci) : MCI(mci) {}
virtual void NotifyFunctionEmitted(const Function &,
void *Code, size_t Size,
const EmittedFunctionDetails &) {
MCI->setAddress(Code);
MCI->setSize(Size);
}
};
MCIListener MCIL(MCI);
RegisterJITEventListener(&MCIL);
runJITOnFunctionUnlocked(F, locked);
registerMachineCodeInfo(0);
UnregisterJITEventListener(&MCIL);
}
void JIT::runJITOnFunctionUnlocked(Function *F, const MutexGuard &locked) {
@ -709,3 +756,6 @@ void JIT::addPendingFunction(Function *F) {
MutexGuard locked(lock);
jitstate->getPendingFunctions(locked).push_back(F);
}
JITEventListener::~JITEventListener() {}

17
lib/ExecutionEngine/JIT/JIT.h
View File

@ -20,10 +20,11 @@
namespace llvm {
class Function;
class TargetMachine;
class TargetJITInfo;
class JITEvent_EmittedFunctionDetails;
class MachineCodeEmitter;
class MachineCodeInfo;
class TargetJITInfo;
class TargetMachine;
class JITState {
private:
@ -52,6 +53,7 @@ class JIT : public ExecutionEngine {
TargetMachine &TM; // The current target we are compiling to
TargetJITInfo &TJI; // The JITInfo for the target we are compiling to
JITCodeEmitter *JCE; // JCE object
std::vector<JITEventListener*> EventListeners;
JITState *jitstate;
@ -157,9 +159,18 @@ public:
// Run the JIT on F and return information about the generated code
void runJITOnFunction(Function *F, MachineCodeInfo *MCI = 0);
virtual void RegisterJITEventListener(JITEventListener *L);
virtual void UnregisterJITEventListener(JITEventListener *L);
/// These functions correspond to the methods on JITEventListener. They
/// iterate over the registered listeners and call the corresponding method on
/// each.
void NotifyFunctionEmitted(
const Function &F, void *Code, size_t Size,
const JITEvent_EmittedFunctionDetails &Details);
void NotifyFreeingMachineCode(const Function &F, void *OldPtr);
private:
static JITCodeEmitter *createEmitter(JIT &J, JITMemoryManager *JMM);
void registerMachineCodeInfo(MachineCodeInfo *MCI);
void runJITOnFunctionUnlocked(Function *F, const MutexGuard &locked);
void updateFunctionStub(Function *F);
void updateDlsymStubTable();

165
lib/ExecutionEngine/JIT/JITEmitter.cpp
View File

@ -24,8 +24,9 @@
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRelocation.h"
#include "llvm/ExecutionEngine/JITMemoryManager.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/ExecutionEngine/JITMemoryManager.h"
#include "llvm/CodeGen/MachineCodeInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetJITInfo.h"
@ -410,136 +411,6 @@ void *JITResolver::JITCompilerFn(void *Stub) {
return Result;
}
//===----------------------------------------------------------------------===//
// Function Index Support
// On MacOS we generate an index of currently JIT'd functions so that
// performance tools can determine a symbol name and accurate code range for a
// PC value. Because performance tools are generally asynchronous, the code
// below is written with the hope that it could be interrupted at any time and
// have useful answers. However, we don't go crazy with atomic operations, we
// just do a "reasonable effort".
#ifdef __APPLE__
#define ENABLE_JIT_SYMBOL_TABLE 0
#endif
/// JitSymbolEntry - Each function that is JIT compiled results in one of these
/// being added to an array of symbols. This indicates the name of the function
/// as well as the address range it occupies. This allows the client to map
/// from a PC value to the name of the function.
struct JitSymbolEntry {
const char *FnName; // FnName - a strdup'd string.
void *FnStart;
intptr_t FnSize;
};
struct JitSymbolTable {
/// NextPtr - This forms a linked list of JitSymbolTable entries. This
/// pointer is not used right now, but might be used in the future. Consider
/// it reserved for future use.
JitSymbolTable *NextPtr;
/// Symbols - This is an array of JitSymbolEntry entries. Only the first
/// 'NumSymbols' symbols are valid.
JitSymbolEntry *Symbols;
/// NumSymbols - This indicates the number entries in the Symbols array that
/// are valid.
unsigned NumSymbols;
/// NumAllocated - This indicates the amount of space we have in the Symbols
/// array. This is a private field that should not be read by external tools.
unsigned NumAllocated;
};
#if ENABLE_JIT_SYMBOL_TABLE
JitSymbolTable *__jitSymbolTable;
#endif
static void AddFunctionToSymbolTable(const char *FnName,
void *FnStart, intptr_t FnSize) {
assert(FnName != 0 && FnStart != 0 && "Bad symbol to add");
JitSymbolTable **SymTabPtrPtr = 0;
#if !ENABLE_JIT_SYMBOL_TABLE
return;
#else
SymTabPtrPtr = &__jitSymbolTable;
#endif
// If this is the first entry in the symbol table, add the JitSymbolTable
// index.
if (*SymTabPtrPtr == 0) {
JitSymbolTable *New = new JitSymbolTable();
New->NextPtr = 0;
New->Symbols = 0;
New->NumSymbols = 0;
New->NumAllocated = 0;
*SymTabPtrPtr = New;
}
JitSymbolTable *SymTabPtr = *SymTabPtrPtr;
// If we have space in the table, reallocate the table.
if (SymTabPtr->NumSymbols >= SymTabPtr->NumAllocated) {
// If we don't have space, reallocate the table.
unsigned NewSize = std::max(64U, SymTabPtr->NumAllocated*2);
JitSymbolEntry *NewSymbols = new JitSymbolEntry[NewSize];
JitSymbolEntry *OldSymbols = SymTabPtr->Symbols;
// Copy the old entries over.
memcpy(NewSymbols, OldSymbols, SymTabPtr->NumSymbols*sizeof(OldSymbols[0]));
// Swap the new symbols in, delete the old ones.
SymTabPtr->Symbols = NewSymbols;
SymTabPtr->NumAllocated = NewSize;
delete [] OldSymbols;
}
// Otherwise, we have enough space, just tack it onto the end of the array.
JitSymbolEntry &Entry = SymTabPtr->Symbols[SymTabPtr->NumSymbols];
Entry.FnName = strdup(FnName);
Entry.FnStart = FnStart;
Entry.FnSize = FnSize;
++SymTabPtr->NumSymbols;
}
static void RemoveFunctionFromSymbolTable(void *FnStart) {
assert(FnStart && "Invalid function pointer");
JitSymbolTable **SymTabPtrPtr = 0;
#if !ENABLE_JIT_SYMBOL_TABLE
return;
#else
SymTabPtrPtr = &__jitSymbolTable;
#endif
JitSymbolTable *SymTabPtr = *SymTabPtrPtr;
JitSymbolEntry *Symbols = SymTabPtr->Symbols;
// Scan the table to find its index. The table is not sorted, so do a linear
// scan.
unsigned Index;
for (Index = 0; Symbols[Index].FnStart != FnStart; ++Index)
assert(Index != SymTabPtr->NumSymbols && "Didn't find function!");
// Once we have an index, we know to nuke this entry, overwrite it with the
// entry at the end of the array, making the last entry redundant.
const char *OldName = Symbols[Index].FnName;
Symbols[Index] = Symbols[SymTabPtr->NumSymbols-1];
free((void*)OldName);
// Drop the number of symbols in the table.
--SymTabPtr->NumSymbols;
// Finally, if we deleted the final symbol, deallocate the table itself.
if (SymTabPtr->NumSymbols != 0)
return;
*SymTabPtrPtr = 0;
delete [] Symbols;
delete SymTabPtr;
}
//===----------------------------------------------------------------------===//
// JITEmitter code.
//
@ -616,11 +487,8 @@ namespace {
// in the JITResolver's ExternalFnToStubMap.
StringMap<void *> ExtFnStubs;
// MCI - A pointer to a MachineCodeInfo object to update with information.
MachineCodeInfo *MCI;
public:
JITEmitter(JIT &jit, JITMemoryManager *JMM) : Resolver(jit), CurFn(0), MCI(0) {
JITEmitter(JIT &jit, JITMemoryManager *JMM) : Resolver(jit), CurFn(0) {
MemMgr = JMM ? JMM : JITMemoryManager::CreateDefaultMemManager();
if (jit.getJITInfo().needsGOT()) {
MemMgr->AllocateGOT();
@ -716,10 +584,6 @@ namespace {
JITMemoryManager *getMemMgr(void) const { return MemMgr; }
void setMachineCodeInfo(MachineCodeInfo *mci) {
MCI = mci;
}
private:
void *getPointerToGlobal(GlobalValue *GV, void *Reference, bool NoNeedStub);
void *getPointerToGVIndirectSym(GlobalValue *V, void *Reference,
@ -1157,21 +1021,16 @@ bool JITEmitter::finishFunction(MachineFunction &F) {
// Invalidate the icache if necessary.
sys::Memory::InvalidateInstructionCache(FnStart, FnEnd-FnStart);
// Add it to the JIT symbol table if the host wants it.
AddFunctionToSymbolTable(F.getFunction()->getNameStart(),
FnStart, FnEnd-FnStart);
JITEvent_EmittedFunctionDetails Details;
TheJIT->NotifyFunctionEmitted(*F.getFunction(), FnStart, FnEnd-FnStart,
Details);
DOUT << "JIT: Finished CodeGen of [" << (void*)FnStart
<< "] Function: " << F.getFunction()->getName()
<< ": " << (FnEnd-FnStart) << " bytes of text, "
<< Relocations.size() << " relocations\n";
if (MCI) {
MCI->setAddress(FnStart);
MCI->setSize(FnEnd-FnStart);
}
Relocations.clear();
ConstPoolAddresses.clear();
@ -1495,13 +1354,6 @@ void *JIT::getPointerToFunctionOrStub(Function *F) {
return JE->getJITResolver().getFunctionStub(F);
}
void JIT::registerMachineCodeInfo(MachineCodeInfo *mc) {
assert(isa<JITEmitter>(JCE) && "Unexpected MCE?");
JITEmitter *JE = cast<JITEmitter>(getCodeEmitter());
JE->setMachineCodeInfo(mc);
}
void JIT::updateFunctionStub(Function *F) {
// Get the empty stub we generated earlier.
assert(isa<JITEmitter>(JCE) && "Unexpected MCE?");
@ -1609,10 +1461,9 @@ void JIT::freeMachineCodeForFunction(Function *F) {
void *OldPtr = updateGlobalMapping(F, 0);
if (OldPtr)
RemoveFunctionFromSymbolTable(OldPtr);
TheJIT->NotifyFreeingMachineCode(*F, OldPtr);
// Free the actual memory for the function body and related stuff.
assert(isa<JITEmitter>(JCE) && "Unexpected MCE?");
cast<JITEmitter>(JCE)->deallocateMemForFunction(F);
}

173
lib/ExecutionEngine/JIT/MacOSJITEventListener.cpp Normal file
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@ -0,0 +1,173 @@
//===-- MacOSJITEventListener.cpp - Save symbol table for OSX perf tools --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines a JITEventListener object that records JITted functions to
// a global __jitSymbolTable linked list. Apple's performance tools use this to
// determine a symbol name and accurate code range for a PC value. Because
// performance tools are generally asynchronous, the code below is written with
// the hope that it could be interrupted at any time and have useful answers.
// However, we don't go crazy with atomic operations, we just do a "reasonable
// effort".
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "macos-jit-event-listener"
#include "llvm/Function.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
#include <stddef.h>
using namespace llvm;
#ifdef __APPLE__
#define ENABLE_JIT_SYMBOL_TABLE 0
#endif
#if ENABLE_JIT_SYMBOL_TABLE
namespace {
/// JITSymbolEntry - Each function that is JIT compiled results in one of these
/// being added to an array of symbols. This indicates the name of the function
/// as well as the address range it occupies. This allows the client to map
/// from a PC value to the name of the function.
struct JITSymbolEntry {
const char *FnName; // FnName - a strdup'd string.
void *FnStart;
intptr_t FnSize;
};
struct JITSymbolTable {
/// NextPtr - This forms a linked list of JitSymbolTable entries. This
/// pointer is not used right now, but might be used in the future. Consider
/// it reserved for future use.
JITSymbolTable *NextPtr;
/// Symbols - This is an array of JitSymbolEntry entries. Only the first
/// 'NumSymbols' symbols are valid.
JITSymbolEntry *Symbols;
/// NumSymbols - This indicates the number entries in the Symbols array that
/// are valid.
unsigned NumSymbols;
/// NumAllocated - This indicates the amount of space we have in the Symbols
/// array. This is a private field that should not be read by external tools.
unsigned NumAllocated;
};
class MacOSJITEventListener : public JITEventListener {
public:
virtual void NotifyFunctionEmitted(const Function &F,
void *FnStart, size_t FnSize,
const EmittedFunctionDetails &Details);
virtual void NotifyFreeingMachineCode(const Function &F, void *OldPtr);
};
} // anonymous namespace.
// This is a public symbol so the performance tools can find it.
JITSymbolTable *__jitSymbolTable;
namespace llvm {
JITEventListener *createMacOSJITEventListener() {
return new MacOSJITEventListener;
}
}
// Adds the just-emitted function to the symbol table.
void MacOSJITEventListener::NotifyFunctionEmitted(
const Function &F, void *FnStart, size_t FnSize,
const EmittedFunctionDetails &) {
const char *const FnName = F.getNameStart();
assert(FnName != 0 && FnStart != 0 && "Bad symbol to add");
JITSymbolTable **SymTabPtrPtr = 0;
SymTabPtrPtr = &__jitSymbolTable;
// If this is the first entry in the symbol table, add the JITSymbolTable
// index.
if (*SymTabPtrPtr == 0) {
JITSymbolTable *New = new JITSymbolTable();
New->NextPtr = 0;
New->Symbols = 0;
New->NumSymbols = 0;
New->NumAllocated = 0;
*SymTabPtrPtr = New;
}
JITSymbolTable *SymTabPtr = *SymTabPtrPtr;
// If we have space in the table, reallocate the table.
if (SymTabPtr->NumSymbols >= SymTabPtr->NumAllocated) {
// If we don't have space, reallocate the table.
unsigned NewSize = std::max(64U, SymTabPtr->NumAllocated*2);
JITSymbolEntry *NewSymbols = new JITSymbolEntry[NewSize];
JITSymbolEntry *OldSymbols = SymTabPtr->Symbols;
// Copy the old entries over.
memcpy(NewSymbols, OldSymbols, SymTabPtr->NumSymbols*sizeof(OldSymbols[0]));
// Swap the new symbols in, delete the old ones.
SymTabPtr->Symbols = NewSymbols;
SymTabPtr->NumAllocated = NewSize;
delete [] OldSymbols;
}
// Otherwise, we have enough space, just tack it onto the end of the array.
JITSymbolEntry &Entry = SymTabPtr->Symbols[SymTabPtr->NumSymbols];
Entry.FnName = strdup(FnName);
Entry.FnStart = FnStart;
Entry.FnSize = FnSize;
++SymTabPtr->NumSymbols;
}
// Removes the to-be-deleted function from the symbol table.
void MacOSJITEventListener::NotifyFreeingMachineCode(
const Function &, void *FnStart) {
assert(FnStart && "Invalid function pointer");
JITSymbolTable **SymTabPtrPtr = 0;
SymTabPtrPtr = &__jitSymbolTable;
JITSymbolTable *SymTabPtr = *SymTabPtrPtr;
JITSymbolEntry *Symbols = SymTabPtr->Symbols;
// Scan the table to find its index. The table is not sorted, so do a linear
// scan.
unsigned Index;
for (Index = 0; Symbols[Index].FnStart != FnStart; ++Index)
assert(Index != SymTabPtr->NumSymbols && "Didn't find function!");
// Once we have an index, we know to nuke this entry, overwrite it with the
// entry at the end of the array, making the last entry redundant.
const char *OldName = Symbols[Index].FnName;
Symbols[Index] = Symbols[SymTabPtr->NumSymbols-1];
free((void*)OldName);
// Drop the number of symbols in the table.
--SymTabPtr->NumSymbols;
// Finally, if we deleted the final symbol, deallocate the table itself.
if (SymTabPtr->NumSymbols != 0)
return;
*SymTabPtrPtr = 0;
delete [] Symbols;
delete SymTabPtr;
}
#else // !ENABLE_JIT_SYMBOL_TABLE
namespace llvm {
// By defining this to return NULL, we can let clients call it unconditionally,
// even if they aren't on an Apple system.
JITEventListener *createMacOSJITEventListener() {
return NULL;
}
} // namespace llvm
#endif // ENABLE_JIT_SYMBOL_TABLE

7
tools/lli/lli.cpp
View File

@ -18,9 +18,10 @@
#include "llvm/Type.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/CodeGen/LinkAllCodegenComponents.h"
#include "llvm/ExecutionEngine/JIT.h"
#include "llvm/ExecutionEngine/Interpreter.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/ExecutionEngine/Interpreter.h"
#include "llvm/ExecutionEngine/JIT.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
@ -149,6 +150,8 @@ int main(int argc, char **argv, char * const *envp) {
exit(1);
}
EE->RegisterJITEventListener(createMacOSJITEventListener());
if (NoLazyCompilation)
EE->DisableLazyCompilation();

241
unittests/ExecutionEngine/JIT/JITEventListenerTest.cpp Normal file
View File

@ -0,0 +1,241 @@
//===- JITEventListenerTest.cpp - Unit tests for JITEventListeners --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/ModuleProvider.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/CodeGen/MachineCodeInfo.h"
#include "llvm/ExecutionEngine/JIT.h"
#include "llvm/Support/TypeBuilder.h"
#include "llvm/Target/TargetSelect.h"
#include "gtest/gtest.h"
#include <vector>
using namespace llvm;
namespace {
struct FunctionEmittedEvent {
// Indices are local to the RecordingJITEventListener, since the
// JITEventListener interface makes no guarantees about the order of
// calls between Listeners.
unsigned Index;
const Function *F;
void *Code;
size_t Size;
JITEvent_EmittedFunctionDetails Details;
};
struct FunctionFreedEvent {
unsigned Index;
const Function *F;
void *Code;
};
struct RecordingJITEventListener : public JITEventListener {
std::vector<FunctionEmittedEvent> EmittedEvents;
std::vector<FunctionFreedEvent> FreedEvents;
int NextIndex;
RecordingJITEventListener() : NextIndex(0) {}
virtual void NotifyFunctionEmitted(const Function &F,
void *Code, size_t Size,
const EmittedFunctionDetails &Details) {
FunctionEmittedEvent Event = {NextIndex++, &F, Code, Size, Details};
EmittedEvents.push_back(Event);
}
virtual void NotifyFreeingMachineCode(const Function &F, void *OldPtr) {
FunctionFreedEvent Event = {NextIndex++, &F, OldPtr};
FreedEvents.push_back(Event);
}
};
class JITEventListenerTest : public testing::Test {
protected:
JITEventListenerTest()
: M(new Module("module")),
EE(ExecutionEngine::createJIT(new ExistingModuleProvider(M))) {
}
Module *M;
const OwningPtr<ExecutionEngine> EE;
};
Function *buildFunction(Module *M) {
Function *Result = Function::Create(
TypeBuilder<int32_t(int32_t), false>::get(),
GlobalValue::ExternalLinkage, "id", M);
Value *Arg = Result->arg_begin();
BasicBlock *BB = BasicBlock::Create("entry", Result);
ReturnInst::Create(Arg, BB);
return Result;
}
// Tests that a single JITEventListener follows JIT events accurately.
TEST_F(JITEventListenerTest, Simple) {
RecordingJITEventListener Listener;
EE->RegisterJITEventListener(&Listener);
Function *F1 = buildFunction(M);
Function *F2 = buildFunction(M);
void *F1_addr = EE->getPointerToFunction(F1);
void *F2_addr = EE->getPointerToFunction(F2);
EE->getPointerToFunction(F1); // Should do nothing.
EE->freeMachineCodeForFunction(F1);
EE->freeMachineCodeForFunction(F2);
ASSERT_EQ(2U, Listener.EmittedEvents.size());
ASSERT_EQ(2U, Listener.FreedEvents.size());
EXPECT_EQ(0U, Listener.EmittedEvents[0].Index);
EXPECT_EQ(F1, Listener.EmittedEvents[0].F);
EXPECT_EQ(F1_addr, Listener.EmittedEvents[0].Code);
EXPECT_LT(0U, Listener.EmittedEvents[0].Size)
<< "We don't know how big the function will be, but it had better"
<< " contain some bytes.";
EXPECT_EQ(1U, Listener.EmittedEvents[1].Index);
EXPECT_EQ(F2, Listener.EmittedEvents[1].F);
EXPECT_EQ(F2_addr, Listener.EmittedEvents[1].Code);
EXPECT_LT(0U, Listener.EmittedEvents[1].Size)
<< "We don't know how big the function will be, but it had better"
<< " contain some bytes.";
EXPECT_EQ(2U, Listener.FreedEvents[0].Index);
EXPECT_EQ(F1, Listener.FreedEvents[0].F);
EXPECT_EQ(F1_addr, Listener.FreedEvents[0].Code);
EXPECT_EQ(3U, Listener.FreedEvents[1].Index);
EXPECT_EQ(F2, Listener.FreedEvents[1].F);
EXPECT_EQ(F2_addr, Listener.FreedEvents[1].Code);
F1->eraseFromParent();
F2->eraseFromParent();
}
// Tests that a single JITEventListener follows JIT events accurately.
TEST_F(JITEventListenerTest, MultipleListenersDontInterfere) {
RecordingJITEventListener Listener1;
RecordingJITEventListener Listener2;
RecordingJITEventListener Listener3;
Function *F1 = buildFunction(M);
Function *F2 = buildFunction(M);
EE->RegisterJITEventListener(&Listener1);
EE->RegisterJITEventListener(&Listener2);
void *F1_addr = EE->getPointerToFunction(F1);
EE->RegisterJITEventListener(&Listener3);
EE->UnregisterJITEventListener(&Listener1);
void *F2_addr = EE->getPointerToFunction(F2);
EE->UnregisterJITEventListener(&Listener2);
EE->UnregisterJITEventListener(&Listener3);
EE->freeMachineCodeForFunction(F1);
EE->RegisterJITEventListener(&Listener2);
EE->RegisterJITEventListener(&Listener3);
EE->RegisterJITEventListener(&Listener1);
EE->freeMachineCodeForFunction(F2);
EE->UnregisterJITEventListener(&Listener1);
EE->UnregisterJITEventListener(&Listener2);
EE->UnregisterJITEventListener(&Listener3);
// Listener 1.
ASSERT_EQ(1U, Listener1.EmittedEvents.size());
ASSERT_EQ(1U, Listener1.FreedEvents.size());
EXPECT_EQ(0U, Listener1.EmittedEvents[0].Index);
EXPECT_EQ(F1, Listener1.EmittedEvents[0].F);
EXPECT_EQ(F1_addr, Listener1.EmittedEvents[0].Code);
EXPECT_LT(0U, Listener1.EmittedEvents[0].Size)
<< "We don't know how big the function will be, but it had better"
<< " contain some bytes.";
EXPECT_EQ(1U, Listener1.FreedEvents[0].Index);
EXPECT_EQ(F2, Listener1.FreedEvents[0].F);
EXPECT_EQ(F2_addr, Listener1.FreedEvents[0].Code);
// Listener 2.
ASSERT_EQ(2U, Listener2.EmittedEvents.size());
ASSERT_EQ(1U, Listener2.FreedEvents.size());
EXPECT_EQ(0U, Listener2.EmittedEvents[0].Index);
EXPECT_EQ(F1, Listener2.EmittedEvents[0].F);
EXPECT_EQ(F1_addr, Listener2.EmittedEvents[0].Code);
EXPECT_LT(0U, Listener2.EmittedEvents[0].Size)
<< "We don't know how big the function will be, but it had better"
<< " contain some bytes.";
EXPECT_EQ(1U, Listener2.EmittedEvents[1].Index);
EXPECT_EQ(F2, Listener2.EmittedEvents[1].F);
EXPECT_EQ(F2_addr, Listener2.EmittedEvents[1].Code);
EXPECT_LT(0U, Listener2.EmittedEvents[1].Size)
<< "We don't know how big the function will be, but it had better"
<< " contain some bytes.";
EXPECT_EQ(2U, Listener2.FreedEvents[0].Index);
EXPECT_EQ(F2, Listener2.FreedEvents[0].F);
EXPECT_EQ(F2_addr, Listener2.FreedEvents[0].Code);
// Listener 3.
ASSERT_EQ(1U, Listener3.EmittedEvents.size());
ASSERT_EQ(1U, Listener3.FreedEvents.size());
EXPECT_EQ(0U, Listener3.EmittedEvents[0].Index);
EXPECT_EQ(F2, Listener3.EmittedEvents[0].F);
EXPECT_EQ(F2_addr, Listener3.EmittedEvents[0].Code);
EXPECT_LT(0U, Listener3.EmittedEvents[0].Size)
<< "We don't know how big the function will be, but it had better"
<< " contain some bytes.";
EXPECT_EQ(1U, Listener3.FreedEvents[0].Index);
EXPECT_EQ(F2, Listener3.FreedEvents[0].F);
EXPECT_EQ(F2_addr, Listener3.FreedEvents[0].Code);
F1->eraseFromParent();
F2->eraseFromParent();
}
TEST_F(JITEventListenerTest, MatchesMachineCodeInfo) {
RecordingJITEventListener Listener;
MachineCodeInfo MCI;
Function *F = buildFunction(M);
EE->RegisterJITEventListener(&Listener);
EE->runJITOnFunction(F, &MCI);
void *F_addr = EE->getPointerToFunction(F);
EE->freeMachineCodeForFunction(F);
ASSERT_EQ(1U, Listener.EmittedEvents.size());
ASSERT_EQ(1U, Listener.FreedEvents.size());
EXPECT_EQ(0U, Listener.EmittedEvents[0].Index);
EXPECT_EQ(F, Listener.EmittedEvents[0].F);
EXPECT_EQ(F_addr, Listener.EmittedEvents[0].Code);
EXPECT_EQ(MCI.address(), Listener.EmittedEvents[0].Code);
EXPECT_EQ(MCI.size(), Listener.EmittedEvents[0].Size);
EXPECT_EQ(1U, Listener.FreedEvents[0].Index);
EXPECT_EQ(F, Listener.FreedEvents[0].F);
EXPECT_EQ(F_addr, Listener.FreedEvents[0].Code);
}
class JITEnvironment : public testing::Environment {
virtual void SetUp() {
// Required for ExecutionEngine::createJIT to create a JIT.
InitializeNativeTarget();
}
};
testing::Environment* const jit_env =
testing::AddGlobalTestEnvironment(new JITEnvironment);
} // anonymous namespace

15
unittests/ExecutionEngine/JIT/Makefile Normal file
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@ -0,0 +1,15 @@
##===- unittests/ExecutionEngine/JIT/Makefile --------------*- Makefile -*-===##
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
##===----------------------------------------------------------------------===##
LEVEL = ../../..
TESTNAME = JIT
LINK_COMPONENTS := core support jit native
include $(LEVEL)/Makefile.config
include $(LLVM_SRC_ROOT)/unittests/Makefile.unittest

19
unittests/ExecutionEngine/Makefile Normal file
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@ -0,0 +1,19 @@
##===- unittests/ExecutionEngine/Makefile ------------------*- Makefile -*-===##
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
##===----------------------------------------------------------------------===##
LEVEL = ../..
include $(LEVEL)/Makefile.config
PARALLEL_DIRS = JIT
include $(LEVEL)/Makefile.common
clean::
$(Verb) $(RM) -f *Tests

2
unittests/Makefile
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@ -16,7 +16,7 @@ BUILD_ARCHIVE = 1
CPP.Flags += -I$(LLVM_SRC_ROOT)/utils/unittest/googletest/include/
CPP.Flags += -Wno-variadic-macros
PARALLEL_DIRS = ADT Support VMCore MC
PARALLEL_DIRS = ADT ExecutionEngine Support VMCore MC
include $(LEVEL)/Makefile.common