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llvm_final.cpp
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llvm_final.cpp
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#include "llvm/IR/Instructions.h"
#include "llvm/Pass.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Value.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/Passes/PassPlugin.h"
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <unordered_map>
#include <unordered_set>
#include <algorithm>
//this pass is used for long-run sanitize check.
using namespace llvm;
static std::string global_addr("start_address");
static std::string global_end("end_address");
static std::string target_func("_TraceMemory");
static std::string slow_func("_Traceslow");
static std::string global_base("global_addr_");
static std::string pmem_pmdk("pmemobj_create");
static std::string pmem_nopmdk("mmap");
const char* filter_pmem = "/home/cwk/cwk/noname/llvm_try/filterpmem";
const char* filter_dram = "/home/cwk/cwk/noname/llvm_try/filterdram";
static size_t freed_value = 0xfdfdfdfdfdfdfdfd;
static size_t red_value = 0xfafafafafafafafa;
static uint32_t free4_value = 0xfdfdfdfd;
static uint32_t red4_value = 0xfafafafa;
static uint32_t red_floatvalue = 0x0b8b8b8aULL;
size_t trace_count = 0;
// #define OUTPUT_ADDRESS
// #define FLOATZONE
// #define CONFIRM_ADDRESS
// #define CHECKMERGE
//configurable filter function
//pair:first for inst offset, second for mem_funcall parameter pos
struct stupid_st{
int _op_flag;
int _op_len;
size_t _op_address;
int _inst_offset;
int master;//merge_main inst or not
bool merged = false;
};
std::unordered_map<std::string, std::unordered_set<size_t>> filter_function;
std::unordered_map<std::string, std::vector<struct stupid_st>> stupid_map;
std::unordered_map<std::string, std::unordered_set<size_t>> dram_function;
namespace {
struct MemoryTrace : public llvm::PassInfoMixin<MemoryTrace> {
void initGlobaladdress(llvm::Module& M, std::string global_name){
auto &ctx = M.getContext();
M.getOrInsertGlobal(global_name, Type::getInt64Ty(ctx));
// PointerType::getUnqual(Type::getInt8Ty(ctx)));
GlobalVariable *namedGlobal = M.getNamedGlobal(global_name);
namedGlobal->setLinkage(GlobalValue::LinkOnceAnyLinkage);
namedGlobal->setInitializer(llvm::ConstantInt::get(Type::getInt64Ty(ctx), 114514));
}
//output function
void CreatePrintfCall(IRBuilder<> &builder, Function *func, Module& M, Value* const_value){
LLVMContext &ctx = M.getContext();
// printf("helloworld from address %lx\n", address);
std::vector<Type*> param4output{Type::getInt8PtrTy(ctx), Type::getInt8PtrTy(ctx), Type::getInt64Ty(ctx), Type::getInt64Ty(ctx),
PointerType::getUnqual(Type::getInt8Ty(ctx)), Type::getInt64Ty(ctx)};
Type* output_type = Type::getVoidTy(ctx);
FunctionType* add_func = FunctionType::get(output_type, param4output, false);
FunctionCallee fc_printf = M.getOrInsertFunction("printf", add_func);
// Constant *store_str = ConstantDataArray::getString(ctx, "store from %p address value %lx, global value is %lx\n");
// Constant *storeVar = M.getOrInsertGlobal("stroe_str", store_str->getType());
// dyn_cast<Globalvariable>(stroeVar)->setInitializer(store_str);
//choose different path to output different value
// Value* strptr;
//load case
// strptr = builder.CreatePointerCast(loadVar, param4output[0], "loadStrPtr");
//store case
// strptr = builder.CreatePointerCast(storeVar, param4output[0], "loadStrPtr");
GlobalVariable* global_value = M.getNamedGlobal(global_addr);
LoadInst* load_global = builder.CreateLoad(Type::getInt64Ty(ctx), global_value);
builder.CreateCall(fc_printf, {const_value, func->getArg(0), func->getArg(1), load_global, func->getArg(3), func->getArg(4)});
}
void CreateCheckLogic(llvm::Module &M, Function* trace_func, llvm::BasicBlock *end,
llvm::BasicBlock *start, llvm::Value* address){
//real check memory addres logic
LLVMContext &ctx = M.getContext();
IRBuilder<> Builder(ctx);
llvm::BasicBlock* for_main = llvm::BasicBlock::Create(ctx, "for_main", trace_func);
llvm::BasicBlock* for_begin = llvm::BasicBlock::Create(ctx, "for_start", trace_func);
#ifdef FLOATZONE
#else
llvm::BasicBlock* if_condition2 = llvm::BasicBlock::Create(ctx, "if_2", trace_func);
llvm::BasicBlock* output_error = llvm::BasicBlock::Create(ctx, "output_error", trace_func);
#endif
llvm::BasicBlock* incres_iter = llvm::BasicBlock::Create(ctx, "increse", trace_func);
Builder.SetInsertPoint(start);
Value* iter = Builder.CreateAlloca(Type::getInt64Ty(ctx));//i
Builder.CreateStore(Builder.getInt64(0), iter);
Value* access_len = trace_func->getArg(1);//len
Value* address_temp = Builder.CreateAlloca(Type::getInt64Ty(ctx));
Builder.CreateStore(address, address_temp);
Builder.CreateBr(for_begin);
Builder.SetInsertPoint(for_begin);
Value* iter_value = Builder.CreateLoad(Type::getInt64Ty(ctx), iter);
Value* cmp_result = Builder.CreateICmpUGT(access_len, iter_value); // i<len
Builder.CreateCondBr(cmp_result, for_main, end);
//main loop
Builder.SetInsertPoint(for_main);
//address plus offset
//load address
//cmp value with default value
//return
// std::cout<<"this is main loop call"<<std::endl; 3,933,528 1,073,741,824
//increment i
//test output for loop
Value* address_intptr = Builder.CreateIntToPtr(Builder.CreateLoad(Type::getInt64Ty(ctx), address_temp), PointerType::getUnqual(Type::getInt32Ty(ctx)));
// Value* origin_value = Builder.CreateLoad(Type::getInt8PtrTy(ctx), address_ptr);
// Value* value2print;
// bool should_convert = origin_value->getType()->isPointerTy();
// if(should_convert)
// value2print = Builder.CreatePtrToInt(origin_value, Type::getInt64Ty(ctx), "castto64");
// else
// value2print = Builder.CreateIntCast(origin_value, Type::getInt64Ty(ctx), false, "castto64");
#ifdef FLOATZONE
Value* posiend_4 = Builder.CreateLoad(Type::getInt32Ty(ctx), address_intptr);
Type* floatType = llvm::Type::getFloatTy(ctx);
Type* floatPtrType = PointerType::get(floatType, 0);
Value* posien_float = Builder.CreateBitOrPointerCast(address, floatPtrType);
//following codes are copied from floatzone
const fltSemantics & floatSem = floatType->getFltSemantics();
APFloat addV(floatSem, APInt(32, /*magic value*/ 0x0b8b8b8a));
Value *addVal = ConstantFP::get(floatType, addV);
//
InlineAsm* test_IA = InlineAsm::get(
FunctionType::get(llvm::Type::getVoidTy(ctx),
{floatPtrType, floatType}, false),
StringRef("vaddss $0, $1, %xmm15"),
StringRef("p,v,~{xmm15},~{dirflag},~{fpsr},~{flags}"),
true,
false,
InlineAsm::AD_ATT,
false);
std::vector<Value*> param4vadd = {posien_float, addVal};
Builder.CreateCall(test_IA, param4vadd);
Builder.CreateBr(incres_iter);
#else
Value* posiend = Builder.CreateLoad(Type::getInt32Ty(ctx), address_intptr);
// Value* load2int = Builder.CreatePtrToInt(load2int, Type::getInt64Ty(ctx));
Value* check_result = Builder.CreateICmpEQ(posiend, Builder.getInt32(free4_value));
Builder.CreateCondBr(check_result, output_error, if_condition2);// output_error, incres_iter);
Builder.SetInsertPoint(if_condition2);
Value* if_result2 = Builder.CreateICmpEQ(posiend, Builder.getInt32(red4_value));
Builder.CreateCondBr(if_result2, output_error, incres_iter);
Builder.SetInsertPoint(output_error);
//TODO add function name, add function line of codes, get these from function args;
std::vector<Type*> param4printf{Type::getInt8PtrTy(ctx), Type::getInt8PtrTy(ctx), Type::getInt64Ty(ctx)};
Type* return_type = Type::getVoidTy(ctx);
FunctionType* print_func = FunctionType::get(return_type, param4printf, false);
FunctionCallee fc_printf = M.getOrInsertFunction("printf", print_func);
// Constant* loop_str = ConstantDataArray::getString(ctx, "mem error from function %s, line %ld\n");
// // Constant* loop_str = ConstantDataArray::getString(ctx, "output from for loop %ld\n");
// Constant* loop_var = M.getOrInsertGlobal("loop_str", loop_str->getType());
// dyn_cast<GlobalVariable>(loop_var)->setInitializer(loop_str);
// Value* str_ptr = Builder.CreatePointerCast(loop_var, param4printf[0], "loopstrPtr");
auto str_ptr = Builder.CreateGlobalStringPtr("mem error from function %s, line %ld\n");
// Builder.CreateCall(fc_printf, {str_ptr, trace_func->getArg(3), trace_func->getArg(4)});
Builder.CreateBr(incres_iter);
//TODO: change to 4 byte check (done already)
//move to next 4 bytes
#endif
Builder.SetInsertPoint(incres_iter);
Value* iter_1 = Builder.CreateAdd(Builder.CreateLoad(Type::getInt64Ty(ctx), iter), Builder.getInt64(4));//i+=4
Value* iter_addr = Builder.CreateAdd(Builder.CreateLoad(Type::getInt64Ty(ctx), address_temp), Builder.getInt64(4));//addr+=4
Builder.CreateStore(iter_1, iter);
Builder.CreateStore(iter_addr, address_temp);
Builder.CreateBr(for_begin);//jmp back
// llvm::BasicBlock *for_loop
}
//normal check, used for those un-tagged function
void CreateSlowFunction(llvm::Module& M){
LLVMContext &ctx = M.getContext();
//void output_memory(void* address, size_t global_addres, int flag);
//void tracememory(void* target_address, size_t acccess_flag, size_t access_sz, char* function_name, size_t loc)
std::vector<Type*> params{Type::getInt8PtrTy(ctx), Type::getInt64Ty(ctx), Type::getInt32Ty(ctx), Type::getInt8PtrTy(ctx), Type::getInt64Ty(ctx)};
Type* rettype = Type::getVoidTy(ctx);
FunctionType* cre_func = FunctionType::get(rettype, params, false);
FunctionCallee fcl = M.getOrInsertFunction(slow_func.c_str(), cre_func);
Function *TraceMemoryFunction = dyn_cast<llvm::Function>(fcl.getCallee());
TraceMemoryFunction->setLinkage(GlobalValue::LinkOnceODRLinkage);
GlobalVariable* glb = M.getNamedGlobal(global_addr);
GlobalVariable* glb_end = M.getNamedGlobal(global_end);
llvm::BasicBlock *BB = llvm::BasicBlock::Create(ctx, "entry", TraceMemoryFunction);
//if we can't decide whether L/S inst is PMem related or not, we need extra cmp operation in CONFIRM_ADDRESS
llvm::BasicBlock* filter_branch = llvm::BasicBlock::Create(ctx, "filter", TraceMemoryFunction);
llvm::BasicBlock *invalid_block = llvm::BasicBlock::Create(ctx, "invlidadd", TraceMemoryFunction);
llvm::BasicBlock* for_branch = llvm::BasicBlock::Create(ctx, "for_loop", TraceMemoryFunction);
#ifdef OUTPUT_ADDRESS
llvm::BasicBlock* filter_branch2 = llvm::BasicBlock::Create(ctx, "filter2", TraceMemoryFunction);
llvm::BasicBlock* filter_branch3 = llvm::BasicBlock::Create(ctx, "filter3", TraceMemoryFunction);
//different branch for different funcall
llvm::BasicBlock *load_branch = llvm::BasicBlock::Create(ctx, "loadcase", TraceMemoryFunction);
llvm::BasicBlock *store_branch = llvm::BasicBlock::Create(ctx, "storecase", TraceMemoryFunction);
llvm::BasicBlock *funccall_branch = llvm::BasicBlock::Create(ctx, "funccase", TraceMemoryFunction);
#endif
llvm::BasicBlock *return_block = llvm::BasicBlock::Create(ctx, "returnfunc", TraceMemoryFunction);
IRBuilder<> Builder(ctx);
Value* str_ptr;
Builder.SetInsertPoint(BB);
Value* orig_arg = TraceMemoryFunction->getArg(0);
Value* cast_arg = Builder.CreatePtrToInt(orig_arg, Builder.getInt64Ty());
// compare the address with original value (should be removed if fine-grid filter pmem is set)
LoadInst* load_address = Builder.CreateLoad(Type::getInt64Ty(ctx), glb);
Value* cmp_address = Builder.CreateICmpUGE(load_address, cast_arg);
// Builder.CreateCondBr(cmp_address, return_block, filter_branch);
Builder.CreateCondBr(cmp_address, invalid_block, filter_branch);
Builder.SetInsertPoint(filter_branch);
//add printf call shit we get error!!
//TODO remove the following 3 lines, since we can be sure the address is definate in PMem with filter file
LoadInst* load_end = Builder.CreateLoad(Type::getInt64Ty(ctx), glb_end);
Value* cmp_len = Builder.CreateICmpULE(cast_arg, load_end);
// Builder.CreateCondBr(cmp_len, for_branch, return_block);
Builder.CreateCondBr(cmp_len, for_branch, invalid_block);
//create forloop function
#ifdef OUTPUT_ADDRESS
CreateCheckLogic(M, TraceMemoryFunction, filter_branch2, for_branch, cast_arg);
#else
CreateCheckLogic(M, TraceMemoryFunction, return_block, for_branch, cast_arg);
#endif
#ifdef OUTPUT_ADDRESS
Builder.SetInsertPoint(filter_branch2);
//here add check logic
// LoadInst* load_value = Builder.CreateLoad(Type::getInt64Ty(ctx), orig_arg);
//for loop to check whole len
Value* cmp_result = Builder.CreateICmpNE(TraceMemoryFunction->getArg(2), Builder.getInt32(0));
Builder.CreateCondBr(cmp_result, filter_branch3, store_branch);
Builder.SetInsertPoint(filter_branch3);
Value* cmp_result3 = Builder.CreateICmpNE(TraceMemoryFunction->getArg(2), Builder.getInt32(1));
Builder.CreateCondBr(cmp_result3, funccall_branch, load_branch);
Builder.SetInsertPoint(load_branch);
//load case
str_ptr = Builder.CreateGlobalStringPtr("load from %p address len %lx, global value is 0x%lx, func is %s, inst_offset is %ld\n");
CreatePrintfCall(Builder, TraceMemoryFunction, M, str_ptr);
Builder.CreateBr(return_block);
Builder.SetInsertPoint(store_branch);
//store case
auto str_ptr2 = Builder.CreateGlobalStringPtr("store to %p address len %lx, global value is 0x%lx, func is %s, inst_offset is %ld\n");
CreatePrintfCall(Builder, TraceMemoryFunction, M, str_ptr2);
Builder.CreateBr(return_block);
Builder.SetInsertPoint(funccall_branch);
// str_ptr = Builder.CreatePointerCast(Var_func, PointerType::getUnqual(Type::getInt8Ty(ctx)), "Strptr");
auto str_ptr3 = Builder.CreateGlobalStringPtr("funccall to %p address len %lx, global valutope is 0x%lx, func is %s, inst_offset is %ld\n");
CreatePrintfCall(Builder, TraceMemoryFunction, M, str_ptr3);
Builder.CreateBr(return_block);
#endif
Builder.SetInsertPoint(invalid_block);
#ifdef OUTPUT_ADDRESS
auto debug_ptr = Builder.CreateGlobalStringPtr("damn we get invlid %p address value %lx, global value %lx, func is %s, line is %ld\n");
CreatePrintfCall(Builder, TraceMemoryFunction, M, debug_ptr);
#endif
Builder.CreateBr(return_block);
Builder.SetInsertPoint(return_block);
// CreatePrintfCall(Builder, TraceMemoryFunction, M, str_ptr);
Builder.CreateRetVoid();
}
//fast check, used for those tagged instructions, no need to divide address
void CreateFastFunction(llvm::Module& M){
LLVMContext &ctx = M.getContext();
//void output_memory(void* address, size_t global_addres, int flag);
//void tracememory(void* target_address, size_t acccess_flag, size_t access_sz, char* function_name, size_t loc)
std::vector<Type*> params{Type::getInt8PtrTy(ctx), Type::getInt64Ty(ctx), Type::getInt32Ty(ctx), Type::getInt8PtrTy(ctx), Type::getInt64Ty(ctx)};
Type* rettype = Type::getVoidTy(ctx);
FunctionType* cre_func = FunctionType::get(rettype, params, false);
FunctionCallee fcl = M.getOrInsertFunction(target_func.c_str(), cre_func);
Function *TraceMemoryFunction = dyn_cast<llvm::Function>(fcl.getCallee());
TraceMemoryFunction->setLinkage(GlobalValue::LinkOnceODRLinkage);
GlobalVariable* glb = M.getNamedGlobal(global_addr);
GlobalVariable* glb_end = M.getNamedGlobal(global_end);
llvm::BasicBlock *BB = llvm::BasicBlock::Create(ctx, "entry", TraceMemoryFunction);
#ifdef CONFIRM_ADDRESS
//if we can't decide whether L/S inst is PMem related or not, we need extra cmp operation in CONFIRM_ADDRESS
llvm::BasicBlock* filter_branch = llvm::BasicBlock::Create(ctx, "filter", TraceMemoryFunction);
llvm::BasicBlock *invalid_block = llvm::BasicBlock::Create(ctx, "invlidadd", TraceMemoryFunction);
#endif
llvm::BasicBlock* for_branch = llvm::BasicBlock::Create(ctx, "for_loop", TraceMemoryFunction);
#ifdef OUTPUT_ADDRESS
llvm::BasicBlock* filter_branch2 = llvm::BasicBlock::Create(ctx, "filter2", TraceMemoryFunction);
llvm::BasicBlock* filter_branch3 = llvm::BasicBlock::Create(ctx, "filter3", TraceMemoryFunction);
//different branch for different funcall
llvm::BasicBlock *load_branch = llvm::BasicBlock::Create(ctx, "loadcase", TraceMemoryFunction);
llvm::BasicBlock *store_branch = llvm::BasicBlock::Create(ctx, "storecase", TraceMemoryFunction);
llvm::BasicBlock *funccall_branch = llvm::BasicBlock::Create(ctx, "funccase", TraceMemoryFunction);
#endif
llvm::BasicBlock *return_block = llvm::BasicBlock::Create(ctx, "returnfunc", TraceMemoryFunction);
IRBuilder<> Builder(ctx);
Value* str_ptr;
Builder.SetInsertPoint(BB);
Value* orig_arg = TraceMemoryFunction->getArg(0);
Value* cast_arg = Builder.CreatePtrToInt(orig_arg, Builder.getInt64Ty());
#ifdef CONFIRM_ADDRESS
// compare the address with original value (should be removed if fine-grid filter pmem is set)
LoadInst* load_address = Builder.CreateLoad(Type::getInt64Ty(ctx), glb);
Value* cmp_address = Builder.CreateICmpUGE(load_address, cast_arg);
// Builder.CreateCondBr(cmp_address, return_block, filter_branch);
Builder.CreateCondBr(cmp_address, invalid_block, filter_branch);
Builder.SetInsertPoint(filter_branch);
//add printf call shit we get error!!
//TODO remove the following 3 lines, since we can be sure the address is definate in PMem with filter file
LoadInst* load_end = Builder.CreateLoad(Type::getInt64Ty(ctx), glb_end);
Value* cmp_len = Builder.CreateICmpULE(cast_arg, load_end);
// Builder.CreateCondBr(cmp_len, for_branch, return_block);
Builder.CreateCondBr(cmp_len, for_branch, invalid_block);
#else
Builder.CreateBr(for_branch);
#endif
//create forloop function
#ifdef OUTPUT_ADDRESS
CreateCheckLogic(M, TraceMemoryFunction, filter_branch2, for_branch, cast_arg);
#else
CreateCheckLogic(M, TraceMemoryFunction, return_block, for_branch, cast_arg);
#endif
#ifdef OUTPUT_ADDRESS
Builder.SetInsertPoint(filter_branch2);
//here add check logic
// LoadInst* load_value = Builder.CreateLoad(Type::getInt64Ty(ctx), orig_arg);
//for loop to check whole len
Value* cmp_result = Builder.CreateICmpNE(TraceMemoryFunction->getArg(2), Builder.getInt32(0));
Builder.CreateCondBr(cmp_result, filter_branch3, store_branch);
Builder.SetInsertPoint(filter_branch3);
Value* cmp_result3 = Builder.CreateICmpNE(TraceMemoryFunction->getArg(2), Builder.getInt32(1));
Builder.CreateCondBr(cmp_result3, funccall_branch, load_branch);
Builder.SetInsertPoint(load_branch);
//load case
//add const str
// Constant *load_str = ConstantDataArray::getString(ctx, "load from %p address len %lx, global value is 0x%lx, func is %s, inst_offset is %ld\n");
// Constant *Var_load = M.getOrInsertGlobal("load_str", load_str->getType());
// dyn_cast<GlobalVariable>(Var_load)->setInitializer(load_str);
// str_ptr = Builder.CreatePointerCast(Var_load, Type::getInt8PtrTy(ctx), "Strptr");
str_ptr = Builder.CreateGlobalStringPtr("load from %p address len %lx, global value is 0x%lx, func is %s, inst_offset is %ld\n");
CreatePrintfCall(Builder, TraceMemoryFunction, M, str_ptr);
Builder.CreateBr(return_block);
Builder.SetInsertPoint(store_branch);
//store case
//add const str
// Constant *store_str = ConstantDataArray::getString(ctx, "store to %p address len %lx, global value is 0x%lx, func is %s, inst_offset is %ld\n");
// Constant *Var_store = M.getOrInsertGlobal("stroe_str", store_str->getType());
// dyn_cast<GlobalVariable>(Var_store)->setInitializer(store_str);
// str_ptr = Builder.CreatePointerCast(Var_store, Type::getInt8PtrTy(ctx), "Strptr");
auto str_ptr2 = Builder.CreateGlobalStringPtr("store to %p address len %lx, global value is 0x%lx, func is %s, inst_offset is %ld\n");
CreatePrintfCall(Builder, TraceMemoryFunction, M, str_ptr2);
Builder.CreateBr(return_block);
Builder.SetInsertPoint(funccall_branch);
//func call case
// Constant *func_str = ConstantDataArray::getString(ctx, "funccall to %p address len %lx, global value is 0x%lx, func is %s, inst_offset is %ld\n");
// Constant *Var_func = M.getOrInsertGlobal("func_str", func_str->getType());
// dyn_cast<GlobalVariable>(Var_func)->setInitializer(func_str);
// str_ptr = Builder.CreatePointerCast(Var_func, PointerType::getUnqual(Type::getInt8Ty(ctx)), "Strptr");
auto str_ptr3 = Builder.CreateGlobalStringPtr("funccall to %p address len %lx, global value is 0x%lx, func is %s, inst_offset is %ld\n");
CreatePrintfCall(Builder, TraceMemoryFunction, M, str_ptr3);
Builder.CreateBr(return_block);
#endif
#ifdef CONFIRM_ADDRESS
Builder.SetInsertPoint(invalid_block);
#ifdef OUTPUT_ADDRESS
// Constant *debug_str = ConstantDataArray::getString(ctx, "damn we get invlid %p address value %lx, global value %lx, func is %s, line is %ld\n");
// Constant *debug_store = M.getOrInsertGlobal("debug_str", debug_str->getType());
// dyn_cast<GlobalVariable>(debug_store)->setInitializer(debug_str);
// Value* debug_ptr = Builder.CreatePointerCast(debug_store, Type::getInt8PtrTy(ctx), "debugptr");
auto debug_ptr = Builder.CreateGlobalStringPtr("damn we get invlid %p address value %lx, global value %lx, func is %s, line is %ld\n");
CreatePrintfCall(Builder, TraceMemoryFunction, M, debug_ptr);
#endif
Builder.CreateBr(return_block);
#endif
Builder.SetInsertPoint(return_block);
// CreatePrintfCall(Builder, TraceMemoryFunction, M, str_ptr);
Builder.CreateRetVoid();
}
void instrumentFuncall(llvm::Module &M, Instruction &I, size_t operation_flag, size_t inst_offset, size_t merged_len=0){
LLVMContext &ctx = M.getContext();
const DataLayout *dl = &M.getDataLayout();
//get memtrace func first
//args1: l/s address (void*)
//args2: l/s flag (size_t)
//args3: l/s len (int)
//args4: function_name (char*)
//args5: line_of_code (size_t)
std::vector<Type*> traceargs{
PointerType::getUnqual(Type::getInt8Ty(ctx)), Type::getInt64Ty(ctx), Type::getInt32Ty(ctx),
PointerType::getUnqual(Type::getInt8Ty(ctx)), Type::getInt64Ty(ctx)
};
FunctionType* tracememtype = FunctionType::get(Type::getVoidTy(ctx), traceargs, false);
FunctionCallee TraceMemory;
if(merged_len != 996996)
TraceMemory = M.getOrInsertFunction(target_func, tracememtype);
else
TraceMemory = M.getOrInsertFunction(slow_func, tracememtype);
Function* func_inst = I.getFunction();
StringRef func_inst_ref = func_inst->getName();
// Constant* valStr = M.getNamedGlobal()
//in case of duplicate name, add 12345
std::string str_name = global_base + func_inst_ref.data() + std::to_string(12345);
Constant* valStr = M.getNamedGlobal(str_name.c_str());
IRBuilder<> Builder(&I);
Value* func_name;
if(valStr == nullptr)
{
Value* newStr = Builder.CreateGlobalString(func_inst_ref, str_name.c_str());
func_name = Builder.CreatePointerCast(newStr, Type::getInt8PtrTy(ctx), "funcname_ptr");
}
else
func_name = Builder.CreatePointerCast(valStr, Type::getInt8PtrTy(ctx), "funcname_ptr");
Value* ptr = nullptr;
Value* op_flag;
size_t access_sz = 0;
Value* real_size;
//value only avalible after the inst.
// Value* value2print;
// Value* cast64;
if(llvm::LoadInst* load = dyn_cast<llvm::LoadInst>(&I))
{
ptr = load->getPointerOperand();
op_flag = Builder.getInt32(1);
auto ty = load->getType();
access_sz = dl->getTypeAllocSize(ty);
real_size = Builder.getInt64(access_sz);
// value2print = &I;
}
else if(llvm::StoreInst* store = dyn_cast<llvm::StoreInst>(&I))
{
ptr = store->getPointerOperand();
op_flag = Builder.getInt32(0);
auto ty = store->getValueOperand()->getType();
access_sz = dl->getTypeAllocSize(ty);
real_size = Builder.getInt64(access_sz);
// value2print = store->getOperand(0);
}
else
{
CallInst* memfunc_call = dyn_cast<CallInst>(&I);
op_flag = Builder.getInt32(operation_flag);
switch(operation_flag)
{
case 2:
ptr = memfunc_call->getArgOperand(0);
real_size = memfunc_call->getArgOperand(2);
break;
case 3:
ptr = memfunc_call->getArgOperand(1);
real_size = memfunc_call->getArgOperand(2);
break;
//other cases to scale
default:
printf("this is not a load/store or mem access function call!\n");
return;
}
}
// size_t access_size = 0;
// bool should_cast = value2print->getType()->isPointerTy();
// if(should_cast)
// cast64 = Builder.CreatePtrToInt(value2print, traceargs[3], "cast64");
// else
// cast64 = Builder.CreateIntCast(value2print, traceargs[3], false, "cast64");
// if(auto *ptrty = dyn_cast<PointerType>(ty))
// {
// ty = ptrty->getPointerElementType();
// access_size = dl->getTypeAllocSize(ty);
// }
// ptr = Builder.CreateBitCast(ptr, Builder.getInt8PtrTy());
const DebugLoc& line_output = I.getDebugLoc();
size_t line_code = 0;
if(line_output)
line_code = line_output.getLine();
#ifndef OUTPUT_ADDRESS
auto lc_arg = Builder.getInt64(line_code);
#else
auto lc_arg = Builder.getInt64(inst_offset);
#endif
if(merged_len != 0 && merged_len != 996996)
real_size = Builder.getInt64(merged_len);
Builder.CreateCall(TraceMemory, {ptr, real_size, op_flag, func_name, lc_arg});
// Builder.CreateLoad(Type::getInt8Ty(ctx), memaddress);
}
void operateGlobal(llvm::Module&M, Function &F, Instruction &I, CallInst* func_called, int len_param=2){
// auto args0 = F.arg_begin();
// args0->
auto func_call = func_called;
Value* func_return = func_call;
Value* func_arg0 = func_call->getArgOperand(0);
Value* pmem_len = func_call->getArgOperand(len_param);
Value* func_operand = func_call->getCalledOperand();
LLVMContext &ctx = M.getContext();
IRBuilder<> builder(I.getNextNode());
GlobalVariable* glb = M.getNamedGlobal(global_addr);
// LoadInst* load_global = builder.CreateLoad(Type::getInt64Ty(ctx), glb);
// LoadInst* load_arg = builder.CreateLoad(Type::getInt64Ty(ctx), args0);
// Value* arg2value = builder.getInt64(func_arg0);
// Value* arg2value = builder.CreateBitCast(func_arg0, builder.getInt8PtrTy());
// Value* arg2return = builder.CreateBitCast(func_return, builder.getInt8PtrTy());
// Value* normal_ptr = builder.CreatePointerCast(func_return, PointerType::getUnqual(Type::getInt8Ty(ctx)));
// Value* normal_value = builder.CreatePtrToInt(arg2value, builder.getInt64Ty());
// LoadInst* load_normal = builder.CreateLoad(Type::getInt64Ty(ctx), normal_ptr);
// Value* llvm_shit = func_call->getCalledValue();
Value* get_function = func_call->getCalledFunction();
Value* arg2value = builder.CreateBitCast(func_call, builder.getInt8PtrTy());
Value* arg2int = builder.CreatePtrToInt(arg2value, builder.getInt64Ty());
errs() << "output value is "<< func_return<<" \n";
errs() << "output arg0 is "<< get_function<<" \n";
errs() << "output args called is "<< func_operand << "\n";
// Value* normal_value_return = builder.CreatePtrToInt(func_return, builder.getInt64Ty());
// errs()<<"norm al return "<<normal_value_return <<" \n";
builder.CreateStore(arg2int, glb);
GlobalVariable* glb_end = M.getNamedGlobal(global_end);
LoadInst* load_previous = builder.CreateLoad(Type::getInt64Ty(ctx), glb);
Value* add_result = builder.CreateAdd(load_previous, pmem_len);
builder.CreateStore(add_result, glb_end);
LoadInst* load_after = builder.CreateLoad(Type::getInt64Ty(ctx), glb);
std::vector<Type*> param4printf{Type::getInt8PtrTy(ctx), Type::getInt64Ty(ctx)};
Type* return_type = Type::getVoidTy(ctx);
FunctionType* print_func = FunctionType::get(return_type, param4printf, false);
FunctionCallee fc_printf = M.getOrInsertFunction("printf", print_func);
auto str_ptr = builder.CreateGlobalStringPtr("output from global %lx\n");
builder.CreateCall(fc_printf, {str_ptr, load_after});
// add FPE init function for floatzone(also can be done in hooked _libc_start_main)
#ifdef FLOATZONE
std::vector<Type*> param4floate{Type::getInt32Ty(ctx)};
Type* float_rtype = Type::getInt32Ty(ctx);
FunctionType* float_init = FunctionType::get(float_rtype, param4floate, false);
FunctionCallee fennable = M.getOrInsertFunction("feenableexcept", float_init);
if(fennable)
{
builder.CreateCall(fennable, {builder.getInt32(0x10)});
errs()<<"feenableexcept add successfully"<<"\n";
}
else
errs()<<"fail to add float init function"<<"\n";
#endif
}
void operateGlobalInvoke(llvm::Module&M, Function &F, Instruction &I, InvokeInst* func_call){
// auto args0 = F.arg_begin();
// args0->
Value* func_return = func_call;
Value* func_arg0 = func_call->getArgOperand(0);
Value* pmem_len = func_call->getArgOperand(2);
Value* func_operand = func_call->getCalledOperand();
LLVMContext &ctx = M.getContext();
//invoke call need to choose the normal jmp target for IRBuilder
BasicBlock* bb = func_call->getNormalDest();
auto II = bb->getFirstNonPHI();
IRBuilder<> builder(II);
GlobalVariable* glb = M.getNamedGlobal(global_addr);
// LoadInst* load_global = builder.CreateLoad(Type::getInt64Ty(ctx), glb);
// LoadInst* load_arg = builder.CreateLoad(Type::getInt64Ty(ctx), args0);
// Value* arg2value = builder.getInt64(func_arg0);
// Value* arg2value = builder.CreateBitCast(func_arg0, builder.getInt8PtrTy());
// Value* arg2return = builder.CreateBitCast(func_return, builder.getInt8PtrTy());
// Value* normal_ptr = builder.CreatePointerCast(func_return, PointerType::getUnqual(Type::getInt8Ty(ctx)));
// Value* normal_value = builder.CreatePtrToInt(arg2value, builder.getInt64Ty());
// LoadInst* load_normal = builder.CreateLoad(Type::getInt64Ty(ctx), normal_ptr);
// Value* llvm_shit = func_call->getCalledValue();
// Value* get_function = func_call->getCalledFunction();
Value* arg2value = builder.CreateBitCast(func_call, builder.getInt8PtrTy());
Value* arg2int = builder.CreatePtrToInt(arg2value, builder.getInt64Ty());
errs() << "output value is "<< func_return<<" \n";
// errs() << "output arg0 is "<< get_function<<" \n";
errs() << "output args called is "<< func_operand << "\n";
// Value* normal_value_return = builder.CreatePtrToInt(func_return, builder.getInt64Ty());
// errs()<<"norm al return "<<normal_value_return <<" \n";
builder.CreateStore(arg2int, glb);
GlobalVariable* glb_end = M.getNamedGlobal(global_end);
LoadInst* load_previous = builder.CreateLoad(Type::getInt64Ty(ctx), glb);
Value* add_result = builder.CreateAdd(load_previous, pmem_len);
builder.CreateStore(add_result, glb_end);
//create add and store end address
// errs()<< "output from global "<<arg2value->getValue() <<"\n";
// Value* glb_value = builder.CreatePointerCast(glb, Type::getInt64Ty(ctx), "start_address");
// StoreInst* store_global = builder.CreateStore(arg2value, load_global);
// LLVMContext &ctx = M.getContext();
// // std::vector<Type*> getargs{Type::getInt8PtrTy(ctx), Type::getInt8PtrTy(ctx), Type::getInt64Ty(ctx), Type::getInt32Ty(ctx)};
// // Function* pmem_func = M.getFunction("abort");
}
inline bool safe_function(Instruction* I){
if(I == NULL)
return false;
switch (I->getOpcode())
{
case Instruction::Br:
return false;
case Instruction::CallBr:
return false;
case Instruction::Call:
return false;
default:
return true;
}
}
int check_merge(int inst_offset, std::vector<stupid_st> &sst){
for(int i=0; i<sst.size(); i++)
{
if(sst[i]._inst_offset == inst_offset && sst[i].master == i)
{
if(sst[i].merged)
return sst[i]._op_len;
else
return 0;
}
else if(sst[i]._inst_offset == inst_offset && sst[i].master != i)
{
std::cout<<"merged inst offset is "<<inst_offset<<" "<<sst[i].master<<std::endl;
return -1;
}
}
std::cout<<"not found this "<<inst_offset<<" instruction! "<<std::endl;
return 0;
}
llvm::PreservedAnalyses run(llvm::Module &M,
llvm::ModuleAnalysisManager &) {
errs() << "In here\n\n";
bool init_flag = false;
Function* main_func;
std::vector<Instruction*> del_vec;
Instruction* invoke_inst = nullptr;
InvokeInst* invoke_func = nullptr;
Function* invoke_fn = nullptr;
struct debug_iter{
Instruction* _II;
Function* _FF;
int _offset;
int is_memfunc;//used for conrim_address
int _merge_flag=0;
};
std::vector<debug_iter> debug_vec;
std::vector<debug_iter> init_vec; //use this vec to simplify the init global address codes
for(auto &F : M)
{
int inst_offset = 0;
int block_offset=0;
for(auto &B : F)
{
block_offset++;
for(auto &I : B)
{
inst_offset++;
if((I.getOpcode() == Instruction::Load || I.getOpcode() == Instruction::Store))
{
debug_iter di1;
di1._II = &I;
di1._FF = &F;
di1._offset = inst_offset;
di1.is_memfunc = 0;
auto inext = I.getNextNode();
if(safe_function(inext))
di1._merge_flag = true;
debug_vec.push_back(di1);
// errs()<<"add function in shit shit "<<F.getName()<<"\n";
}
else if(CallInst* memfunc_call = dyn_cast<CallInst>(&I))
{
Function* fn = memfunc_call->getCalledFunction();
if(fn != NULL)
{
StringRef fn_name = fn->getName();
if((fn_name == "llvm.memcpy.p0.p0.i64" || fn_name == "llvm.memmove.p0.p0.i64") && filter_function[F.getName().data()].size() != 0 )
{
debug_iter di1;
di1._II = &I;
di1._FF = &F;
di1._offset = inst_offset;
di1.is_memfunc = 1;
debug_vec.push_back(di1);
}
}
}
}
}
}
initGlobaladdress(M, global_addr);
initGlobaladdress(M, global_end);
CreateFastFunction(M);
CreateSlowFunction(M);
//Find suitable place to add init and create function
for(auto &F: M)
{
if(F.getName() == "main")
{
Function* main_func = &F;
std::cout<<"found main func here "<<std::endl;
for(auto &B : *(main_func))
{
for(auto &I : B)
{
if(CallInst* func_call = dyn_cast<CallInst>(&I))
{
if(!init_flag)
{
Function* fn = func_call->getCalledFunction();
if(fn != NULL)
{
StringRef fn_name = fn->getName();
// operateGlobal(M, *(fn), I);
if(fn_name == pmem_pmdk.c_str() || fn_name == pmem_nopmdk.c_str())
{
errs() << "output func is " << fn_name << "arg0 is "<< func_call->getArgOperand(0) << "\n";
init_flag = true;
// Value* return_value = func_call;
// errs() << " value is "<<return_value<<"\n";
if(fn_name == pmem_nopmdk.c_str())
{
errs()<<"find mmap use mmap parameter!"<<"\n";
operateGlobal(M, *(fn), I, func_call, 1);
}
else
operateGlobal(M, *(fn), I, func_call);
}
}
}
}
}
}
}
// else if(F.getName() == "_TraceMemory")
// continue;
// else if(F.getName() == "_Z9benchmarkNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEi" || F.getName() == "_ZN12inner_node_t13linear_searchEmb")
// {
// errs() <<"output benchmark here"<<"\n";
// continue;
// }
else if(filter_function[F.getName().data()].size() != 0)
{
// errs() <<"pmem related function "<<F.getName()<<"\n";
for(auto &B : F)
{
for(auto &I : B)
{
if(!init_flag)
{
if(CallInst* func_call = dyn_cast<CallInst>(&I))
{
Function* fn = func_call->getCalledFunction();
if(fn != NULL)
{
StringRef fnc_name = fn->getName();
if(fnc_name == pmem_pmdk.c_str() || fnc_name == pmem_nopmdk.c_str())
{
errs() << "output func in call func " << F.getName() << "arg0 is "<< func_call->getArgOperand(0) << "\n";
init_flag = true;
// Value* return_value = func_call;
// errs() << " value is "<<return_value<<"\n";
if(fnc_name == pmem_nopmdk.c_str())
{
errs()<<"find mmap use mmap parameter!"<<"\n";
operateGlobal(M, *(fn), I, func_call, 1);
}
else
operateGlobal(M, *(fn), I, func_call);
}
}
}
else if(InvokeInst* func_invoke = dyn_cast<InvokeInst>(&I))
{
Function* fn = func_invoke->getCalledFunction();
invoke_fn = fn;
invoke_func = func_invoke;
if(fn != NULL)
{
StringRef fnc_name = fn->getName();
// errs() << "output func is " << fnc_name << "\n";
if(fnc_name == pmem_pmdk.c_str())
{
errs() << "output func in invoke func " << fnc_name << "arg0 is "<< func_invoke->getArgOperand(2) << "\n";
init_flag = true;
// Value* return_value = func_call;
// errs() << " value is "<<return_value<<"\n";
invoke_inst = &I;
}
}
}
}
}
}
}
else
{
for(auto &B : F)
{
for(auto &I : B)
{
if(!init_flag)
{
if(CallInst* func_call = dyn_cast<CallInst>(&I))
{
Function* fn = func_call->getCalledFunction();
if(fn != NULL)
{
StringRef fnc_name = fn->getName();
if(fnc_name == pmem_pmdk.c_str())
{
errs() << "output func in call func in meaningless branch " << F.getName() << "arg0 is "<< func_call->getArgOperand(0) << "\n";
init_flag = true;
// Value* return_value = func_call;
// errs() << " value is "<<return_value<<"\n";
operateGlobal(M, *(fn), I, func_call);
}
}
}
else if(InvokeInst* func_invoke = dyn_cast<InvokeInst>(&I))
{
Function* fn = func_invoke->getCalledFunction();
invoke_fn = fn;
invoke_func = func_invoke;
if(fn != NULL)
{
StringRef fnc_name = fn->getName();
// errs() << "output func is " << fnc_name << "\n";
if(fnc_name == pmem_pmdk.c_str())
{
errs() << "output func in invoke func in meaningless branch" << fnc_name << "arg0 is "<< func_invoke->getArgOperand(2) << "\n";
init_flag = true;
// Value* return_value = func_call;
// errs() << " value is "<<return_value<<"\n";
invoke_inst = &I;
}
}
}
}
}
}
}
}
//instrument
bool skip_flag = false;
for(auto iter : debug_vec)
{
StringRef debug_vec_funcname = iter._FF->getName();
auto shit_offset = iter._offset;
auto this_map = filter_function[debug_vec_funcname.data()];
auto that_map = dram_function[debug_vec_funcname.data()];
//spercific instrument into function
//make a pair to find
size_t query_value = (size_t)iter._offset;
query_value = (query_value<<30);
//0:load 1:store 2:memfunc_param0, 3:memfunc_param1, ...
static const int border_file = 4;
bool if_found = false;
for(int hash_iter=0; hash_iter < border_file; hash_iter++)
{
// printf("shit origin value is %lx\n", query_value); !!!78物业！阿弥诺斯，阿弥诺斯，阿米诺丝诺丝诺丝 阿米阿米
// add instruction comprision
if(this_map.find(query_value) != this_map.end())
{
//encode neighbor node first:
if_found = true;
int merge_len = 0;
#ifdef CHECKMERGE
// printf("instrument added in function offset is %d, flag is %lx, merge flag is %d\n", shit_offset, query_value, iter._merge_flag);
//check if this check can merge
//merge_len case: >0: merge to large len, =0: normal check, <0: be merged to other check, skip this one
if(iter._merge_flag || skip_flag)
merge_len = check_merge(iter._offset, stupid_map[debug_vec_funcname.data()]);
#endif
if(merge_len >= 0)
{
if(merge_len > 0)
skip_flag = true;
instrumentFuncall(M, *(iter._II), hash_iter, shit_offset, merge_len);
trace_count++;
}
else
{
printf("one instruction %d is merged to larger one!\n", iter._offset);
skip_flag = false;
}
}
else if(that_map.find(query_value) != that_map.end())
if_found = true;
query_value++;
}
//instruction is not tracked in file, should be checked with full logic
if(!if_found)
{
// printf("uncertain instruction, use full check instrument!\n");
if(iter.is_memfunc)
{
instrumentFuncall(M, *(iter._II), 2, 12345, 996996);
instrumentFuncall(M, *(iter._II), 3, 12345, 996996);
}
else