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//===-- InstructionInfoTable.cpp ------------------------------------------===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "klee/Internal/Module/InstructionInfoTable.h"
#include "klee/Config/Version.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
# if LLVM_VERSION_CODE < LLVM_VERSION(3,5)
#include "llvm/Assembly/AssemblyAnnotationWriter.h"
#include "llvm/Support/InstIterator.h"
#include "llvm/Linker.h"
#else
#include "llvm/IR/AssemblyAnnotationWriter.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/Linker/Linker.h"
#endif
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/raw_ostream.h"
#if LLVM_VERSION_CODE >= LLVM_VERSION(3,5)
#include "llvm/IR/DebugInfo.h"
#else
#include "llvm/DebugInfo.h"
#endif
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Path.h"
#include <cstdint>
#include <map>
#include <string>
using namespace klee;
class InstructionToLineAnnotator : public llvm::AssemblyAnnotationWriter {
public:
void emitInstructionAnnot(const llvm::Instruction *i,
llvm::formatted_raw_ostream &os) {
os << "%%%";
os << reinterpret_cast<std::uintptr_t>(i);
}
void emitFunctionAnnot(const llvm::Function *f,
llvm::formatted_raw_ostream &os) {
os << "%%%";
os << reinterpret_cast<std::uintptr_t>(f);
}
};
static std::map<uintptr_t, uint64_t>
buildInstructionToLineMap(const llvm::Module &m) {
std::map<uintptr_t, uint64_t> mapping;
InstructionToLineAnnotator a;
std::string str;
llvm::raw_string_ostream os(str);
m.print(os, &a);
os.flush();
const char *s;
unsigned line = 1;
for (s=str.c_str(); *s; s++) {
if (*s != '\n')
continue;
line++;
if (s[1] != '%' || s[2] != '%' || s[3] != '%')
continue;
s += 4;
char *end;
uint64_t value = strtoull(s, &end, 10);
if (end != s) {
mapping.insert(std::make_pair(value, line));
}
s = end;
}
return mapping;
}
static std::string getFullPath(llvm::StringRef Directory,
llvm::StringRef FileName) {
llvm::SmallString<128> file_pathname(Directory);
llvm::sys::path::append(file_pathname, FileName);
return file_pathname.str();
}
class DebugInfoExtractor {
std::vector<std::unique_ptr<std::string>> &internedStrings;
llvm::DebugInfoFinder DIF;
uint64_t counter;
std::map<uintptr_t, uint64_t> lineTable;
const llvm::Module &module;
public:
DebugInfoExtractor(
std::vector<std::unique_ptr<std::string>> &_internedStrings,
const llvm::Module &_module)
: internedStrings(_internedStrings), counter(0), module(_module) {
DIF.processModule(module);
lineTable = buildInstructionToLineMap(module);
}
std::string &getInternedString(const std::string &s) {
auto found = std::find_if(internedStrings.begin(), internedStrings.end(),
[&s](const std::unique_ptr<std::string> &item) {
return *item.get() == s;
});
if (found != internedStrings.end())
return *found->get();
auto newItem = std::unique_ptr<std::string>(new std::string(s));
auto result = newItem.get();
internedStrings.emplace_back(std::move(newItem));
return *result;
}
std::unique_ptr<FunctionInfo> getFunctionInfo(const llvm::Function &Func) {
auto asmLine = lineTable.at(reinterpret_cast<std::uintptr_t>(&Func));
// Acquire function debug information
for (auto subIt = DIF.subprogram_begin(), subItE = DIF.subprogram_end();
subIt != subItE; ++subIt) {
llvm::DISubprogram SubProgram(*subIt);
if (SubProgram.getFunction() != &Func)
continue;
auto path =
getFullPath(SubProgram.getDirectory(), SubProgram.getFilename());
return std::unique_ptr<FunctionInfo>(
new FunctionInfo(counter++, getInternedString(path),
SubProgram.getLineNumber(), asmLine));
}
return std::unique_ptr<FunctionInfo>(
new FunctionInfo(counter++, getInternedString(""), 0, asmLine));
}
std::unique_ptr<InstructionInfo>
getInstructionInfo(const llvm::Instruction &Inst, const FunctionInfo &f) {
auto asmLine = lineTable.at(reinterpret_cast<std::uintptr_t>(&Inst));
llvm::DebugLoc Loc(Inst.getDebugLoc());
if (!Loc.isUnknown()) {
llvm::DIScope Scope(Loc.getScope(module.getContext()));
auto full_path = getFullPath(Scope.getDirectory(), Scope.getFilename());
return std::unique_ptr<InstructionInfo>(
new InstructionInfo(counter++, getInternedString(full_path),
Loc.getLine(), Loc.getCol(), asmLine));
}
// If nothing found, use the surrounding function
return std::unique_ptr<InstructionInfo>(
new InstructionInfo(counter++, f.file, f.line, 0, asmLine));
}
};
InstructionInfoTable::InstructionInfoTable(const llvm::Module &m) {
DebugInfoExtractor DI(internedStrings, m);
for (const auto &Func : m) {
auto F = DI.getFunctionInfo(Func);
auto FD = F.get();
functionInfos.insert(std::make_pair(&Func, std::move(F)));
for (auto it = llvm::inst_begin(Func), ie = llvm::inst_end(Func); it != ie;
++it) {
auto instr = &*it;
infos.insert(std::make_pair(instr, DI.getInstructionInfo(*instr, *FD)));
}
}
}
unsigned InstructionInfoTable::getMaxID() const {
return infos.size() + functionInfos.size();
}
const InstructionInfo &
InstructionInfoTable::getInfo(const llvm::Instruction &inst) const {
auto it = infos.find(&inst);
if (it == infos.end())
llvm::report_fatal_error("invalid instruction, not present in "
"initial module!");
return *it->second.get();
}
const FunctionInfo &
InstructionInfoTable::getFunctionInfo(const llvm::Function &f) const {
auto found = functionInfos.find(&f);
if (found == functionInfos.end())
llvm::report_fatal_error("invalid instruction, not present in "
"initial module!");
return *found->second.get();
}
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