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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/Config/config.h"
#include "klee/Internal/Module/InstructionInfoTable.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Linker.h"
#include "llvm/Module.h"
#include "llvm/Assembly/AsmAnnotationWriter.h"
#include "llvm/Support/CFG.h"
#include "llvm/Support/InstIterator.h"
#include "llvm/Support/raw_ostream.h"
#if !(LLVM_VERSION_MAJOR == 2 && LLVM_VERSION_MINOR < 7)
#include "llvm/Analysis/DebugInfo.h"
#endif
#include "llvm/Analysis/ValueTracking.h"
#include <map>
#include <string>
using namespace llvm;
using namespace klee;
class InstructionToLineAnnotator : public llvm::AssemblyAnnotationWriter {
public:
void emitInstructionAnnot(const Instruction *i, llvm::raw_ostream &os) {
os << "%%%" << (uintptr_t) i;
}
};
static void buildInstructionToLineMap(Module *m,
std::map<const Instruction*, unsigned> &out) {
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') {
line++;
if (s[1]=='%' && s[2]=='%' && s[3]=='%') {
s += 4;
char *end;
unsigned long long value = strtoull(s, &end, 10);
if (end!=s) {
out.insert(std::make_pair((const Instruction*) value, line));
}
s = end;
}
}
}
}
#if (LLVM_VERSION_MAJOR == 2 && LLVM_VERSION_MINOR < 7)
static std::string getDSPIPath(const DbgStopPointInst *dspi) {
std::string dir, file;
bool res = GetConstantStringInfo(dspi->getDirectory(), dir);
assert(res && "GetConstantStringInfo failed");
res = GetConstantStringInfo(dspi->getFileName(), file);
assert(res && "GetConstantStringInfo failed");
if (dir.empty()) {
return file;
} else if (*dir.rbegin() == '/') {
return dir + file;
} else {
return dir + "/" + file;
}
}
#else
static std::string getDSPIPath(DILocation Loc) {
std::string dir = Loc.getDirectory();
std::string file = Loc.getFilename();
if (dir.empty()) {
return file;
} else if (*dir.rbegin() == '/') {
return dir + file;
} else {
return dir + "/" + file;
}
}
#endif
bool InstructionInfoTable::getInstructionDebugInfo(const llvm::Instruction *I,
const std::string *&File,
unsigned &Line) {
#if (LLVM_VERSION_MAJOR == 2 && LLVM_VERSION_MINOR < 7)
if (const DbgStopPointInst *dspi = dyn_cast<DbgStopPointInst>(I)) {
File = internString(getDSPIPath(dspi));
Line = dspi->getLine();
return true;
}
#else
if (MDNode *N = I->getMetadata("dbg")) {
DILocation Loc(N);
File = internString(getDSPIPath(Loc));
Line = Loc.getLineNumber();
return true;
}
#endif
return false;
}
InstructionInfoTable::InstructionInfoTable(Module *m)
: dummyString(""), dummyInfo(0, dummyString, 0, 0) {
unsigned id = 0;
std::map<const Instruction*, unsigned> lineTable;
buildInstructionToLineMap(m, lineTable);
for (Module::iterator fnIt = m->begin(), fn_ie = m->end();
fnIt != fn_ie; ++fnIt) {
const std::string *initialFile = &dummyString;
unsigned initialLine = 0;
// It may be better to look for the closest stoppoint to the entry
// following the CFG, but it is not clear that it ever matters in
// practice.
for (inst_iterator it = inst_begin(fnIt), ie = inst_end(fnIt);
it != ie; ++it)
if (getInstructionDebugInfo(&*it, initialFile, initialLine))
break;
typedef std::map<BasicBlock*, std::pair<const std::string*,unsigned> >
sourceinfo_ty;
sourceinfo_ty sourceInfo;
for (llvm::Function::iterator bbIt = fnIt->begin(), bbie = fnIt->end();
bbIt != bbie; ++bbIt) {
std::pair<sourceinfo_ty::iterator, bool>
res = sourceInfo.insert(std::make_pair(bbIt,
std::make_pair(initialFile,
initialLine)));
if (!res.second)
continue;
std::vector<BasicBlock*> worklist;
worklist.push_back(bbIt);
do {
BasicBlock *bb = worklist.back();
worklist.pop_back();
sourceinfo_ty::iterator si = sourceInfo.find(bb);
assert(si != sourceInfo.end());
const std::string *file = si->second.first;
unsigned line = si->second.second;
for (BasicBlock::iterator it = bb->begin(), ie = bb->end();
it != ie; ++it) {
Instruction *instr = it;
unsigned assemblyLine = 0;
std::map<const Instruction*, unsigned>::const_iterator ltit =
lineTable.find(instr);
if (ltit!=lineTable.end())
assemblyLine = ltit->second;
getInstructionDebugInfo(instr, file, line);
infos.insert(std::make_pair(instr,
InstructionInfo(id++,
*file,
line,
assemblyLine)));
}
for (succ_iterator it = succ_begin(bb), ie = succ_end(bb);
it != ie; ++it) {
if (sourceInfo.insert(std::make_pair(*it,
std::make_pair(file, line))).second)
worklist.push_back(*it);
}
} while (!worklist.empty());
}
}
}
InstructionInfoTable::~InstructionInfoTable() {
for (std::set<const std::string *, ltstr>::iterator
it = internedStrings.begin(), ie = internedStrings.end();
it != ie; ++it)
delete *it;
}
const std::string *InstructionInfoTable::internString(std::string s) {
std::set<const std::string *, ltstr>::iterator it = internedStrings.find(&s);
if (it==internedStrings.end()) {
std::string *interned = new std::string(s);
internedStrings.insert(interned);
return interned;
} else {
return *it;
}
}
unsigned InstructionInfoTable::getMaxID() const {
return infos.size();
}
const InstructionInfo &
InstructionInfoTable::getInfo(const Instruction *inst) const {
std::map<const llvm::Instruction*, InstructionInfo>::const_iterator it =
infos.find(inst);
if (it==infos.end()) {
return dummyInfo;
} else {
return it->second;
}
}
const InstructionInfo &
InstructionInfoTable::getFunctionInfo(const Function *f) const {
if (f->isDeclaration()) {
return dummyInfo;
} else {
return getInfo(f->begin()->begin());
}
}
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