Exemplo n.º 1
0
/**
 * Test the dominator frontier code.
 */
void
CfgTest::testDominators()
{
#define FRONTIER_FOUR     0x08048347
#define FRONTIER_FIVE     0x08048351
#define FRONTIER_TWELVE   0x080483b2
#define FRONTIER_THIRTEEN 0x080483b9

	auto prog = Prog::open(FRONTIER_PENTIUM);
	CPPUNIT_ASSERT(prog);

	auto fe = prog->getFrontEnd();
	Type::clearNamedTypes();
	fe->decode();

	bool gotMain;
	ADDRESS addr = fe->getMainEntryPoint(gotMain);
	CPPUNIT_ASSERT(addr != NO_ADDRESS);

	UserProc *pProc = (UserProc *)prog->getProc(0);
	Cfg *cfg = pProc->getCFG();
	DataFlow *df = pProc->getDataFlow();
	df->dominators(cfg);

	// Find BB "5" (as per Appel, Figure 19.5).
	BasicBlock *bb = nullptr;
	for (const auto &b : *cfg) {
		if (b->getLowAddr() == FRONTIER_FIVE) {
			bb = b;
			break;
		}
	}
	CPPUNIT_ASSERT(bb);

	std::ostringstream expected, actual;
#if 0
	expected << std::hex
	         << FRONTIER_FIVE << " "
	         << FRONTIER_THIRTEEN << " "
	         << FRONTIER_TWELVE << " "
	         << FRONTIER_FOUR << " "
	         << std::dec;
#endif
	expected << std::hex
	         << FRONTIER_THIRTEEN << " "
	         << FRONTIER_FOUR << " "
	         << FRONTIER_TWELVE << " "
	         << FRONTIER_FIVE << " "
	         << std::dec;
	int n5 = df->pbbToNode(bb);
	std::set<int> &DFset = df->getDF(n5);
	for (const auto &ii : DFset)
		actual << std::hex << (unsigned)df->nodeToBB(ii)->getLowAddr() << std::dec << " ";
	CPPUNIT_ASSERT_EQUAL(expected.str(), actual.str());
	delete prog;
}
Exemplo n.º 2
0
/**
 * Test a case where semi dominators are different to dominators.
 */
void
CfgTest::testSemiDominators()
{
#define SEMI_L  0x80483b0
#define SEMI_M  0x80483e2
#define SEMI_B  0x8048345
#define SEMI_D  0x8048354
#define SEMI_M  0x80483e2

	auto prog = Prog::open(SEMI_PENTIUM);
	CPPUNIT_ASSERT(prog);

	auto fe = prog->getFrontEnd();
	Type::clearNamedTypes();
	fe->decode();

	bool gotMain;
	ADDRESS addr = fe->getMainEntryPoint(gotMain);
	CPPUNIT_ASSERT(addr != NO_ADDRESS);

	UserProc *pProc = (UserProc *)prog->getProc(0);
	Cfg *cfg = pProc->getCFG();

	DataFlow *df = pProc->getDataFlow();
	df->dominators(cfg);

	// Find BB "L (6)" (as per Appel, Figure 19.8).
	BasicBlock *bb = nullptr;
	for (const auto &b : *cfg) {
		if (b->getLowAddr() == SEMI_L) {
			bb = b;
			break;
		}
	}
	CPPUNIT_ASSERT(bb);
	int nL = df->pbbToNode(bb);

	// The dominator for L should be B, where the semi dominator is D
	// (book says F)
	unsigned actual_dom  = (unsigned)df->nodeToBB(df->getIdom(nL))->getLowAddr();
	unsigned actual_semi = (unsigned)df->nodeToBB(df->getSemi(nL))->getLowAddr();
	CPPUNIT_ASSERT_EQUAL((unsigned)SEMI_B, actual_dom);
	CPPUNIT_ASSERT_EQUAL((unsigned)SEMI_D, actual_semi);
	// Check the final dominator frontier as well; should be M and B
	std::ostringstream expected, actual;
#if 0
	expected << std::hex << SEMI_M << " " << SEMI_B << " " << std::dec;
#endif
	expected << std::hex << SEMI_B << " " << SEMI_M << " " << std::dec;
	std::set<int> &DFset = df->getDF(nL);
	for (const auto &ii : DFset)
		actual << std::hex << (unsigned)df->nodeToBB(ii)->getLowAddr() << std::dec << " ";
	CPPUNIT_ASSERT_EQUAL(expected.str(), actual.str());
	delete prog;
}
Exemplo n.º 3
0
void CfgTest::testSemiDominators ()
{
  BinaryFileFactory bff;
  BinaryFile* pBF = bff.Load(SEMI_PENTIUM);
  CPPUNIT_ASSERT(pBF != 0);
  Prog* prog = new Prog;
  FrontEnd* pFE = new PentiumFrontEnd(pBF, prog, &bff);
  Type::clearNamedTypes();
  prog->setFrontEnd(pFE);
  pFE->decode(prog);

  bool gotMain;
  ADDRESS addr = pFE->getMainEntryPoint(gotMain);
  CPPUNIT_ASSERT (addr != NO_ADDRESS);

  UserProc* pProc = (UserProc*) prog->getProc(0);
  Cfg* cfg = pProc->getCFG();

  DataFlow* df = pProc->getDataFlow();
  df->dominators(cfg);

  // Find BB "L (6)" (as per Appel, Figure 19.8).
  BB_IT it;
  PBB bb = cfg->getFirstBB(it);
  while (bb && bb->getLowAddr() != SEMI_L)
    {
      bb = cfg->getNextBB(it);
    }
  CPPUNIT_ASSERT(bb);
  int nL = df->pbbToNode(bb);

  // The dominator for L should be B, where the semi dominator is D
  // (book says F)
  unsigned actual_dom	 = (unsigned)df->nodeToBB(df->getIdom(nL))->getLowAddr();
  unsigned actual_semi = (unsigned)df->nodeToBB(df->getSemi(nL))->getLowAddr();
  CPPUNIT_ASSERT_EQUAL((unsigned)SEMI_B, actual_dom);
  CPPUNIT_ASSERT_EQUAL((unsigned)SEMI_D, actual_semi);
  // Check the final dominator frontier as well; should be M and B
  std::ostringstream expected, actual;
  //expected << std::hex << SEMI_M << " " << SEMI_B << " ";
  expected << std::hex << SEMI_B << " " << SEMI_M << " ";
  std::set<int>::iterator ii;
  std::set<int>& DFset = df->getDF(nL);
  for (ii=DFset.begin(); ii != DFset.end(); ii++)
    actual << std::hex << (unsigned)df->nodeToBB(*ii)->getLowAddr() << " ";
  CPPUNIT_ASSERT_EQUAL(expected.str(), actual.str());
  delete pFE;
}
Exemplo n.º 4
0
void CfgTest::testDominators ()
{
  BinaryFileFactory bff;
  BinaryFile *pBF = bff.Load(FRONTIER_PENTIUM);
  CPPUNIT_ASSERT(pBF != 0);
  Prog* prog = new Prog;
  FrontEnd *pFE = new PentiumFrontEnd(pBF, prog, &bff);
  Type::clearNamedTypes();
  prog->setFrontEnd(pFE);
  pFE->decode(prog);

  bool gotMain;
  ADDRESS addr = pFE->getMainEntryPoint(gotMain);
  CPPUNIT_ASSERT (addr != NO_ADDRESS);

  UserProc* pProc = (UserProc*) prog->getProc(0);
  Cfg* cfg = pProc->getCFG();
  DataFlow* df = pProc->getDataFlow();
  df->dominators(cfg);

  // Find BB "5" (as per Appel, Figure 19.5).
  BB_IT it;
  PBB bb = cfg->getFirstBB(it);
  while (bb && bb->getLowAddr() != FRONTIER_FIVE)
    {
      bb = cfg->getNextBB(it);
    }
  CPPUNIT_ASSERT(bb);

  std::ostringstream expected, actual;
  //expected << std::hex << FRONTIER_FIVE << " " << FRONTIER_THIRTEEN << " " << FRONTIER_TWELVE << " " <<
  //	FRONTIER_FOUR << " ";
  expected << std::hex << FRONTIER_THIRTEEN << " " << FRONTIER_FOUR << " " << FRONTIER_TWELVE << " " <<
  FRONTIER_FIVE << " ";
  int n5 = df->pbbToNode(bb);
  std::set<int>::iterator ii;
  std::set<int>& DFset = df->getDF(n5);
  for (ii=DFset.begin(); ii != DFset.end(); ii++)
    actual << std::hex << (unsigned)df->nodeToBB(*ii)->getLowAddr() << " ";
  CPPUNIT_ASSERT_EQUAL(expected.str(), actual.str());

  pBF->UnLoad();
  delete pFE;
}