Refactor: Use ValueFlow::Value for ProgramMemory execute instead of integers (#3477)
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parent
2ca2abdf0e
commit
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4
Makefile
4
Makefile
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@ -542,7 +542,7 @@ $(libcppdir)/platform.o: lib/platform.cpp externals/tinyxml2/tinyxml2.h lib/conf
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$(libcppdir)/preprocessor.o: lib/preprocessor.cpp externals/simplecpp/simplecpp.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/importproject.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/preprocessor.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/utils.h
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$(libcppdir)/preprocessor.o: lib/preprocessor.cpp externals/simplecpp/simplecpp.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/importproject.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/preprocessor.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/utils.h
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$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CPPFILESDIR) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -c -o $(libcppdir)/preprocessor.o $(libcppdir)/preprocessor.cpp
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$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CPPFILESDIR) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -c -o $(libcppdir)/preprocessor.o $(libcppdir)/preprocessor.cpp
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$(libcppdir)/programmemory.o: lib/programmemory.cpp lib/astutils.h lib/config.h lib/errortypes.h lib/importproject.h lib/library.h lib/mathlib.h lib/platform.h lib/programmemory.h lib/settings.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/timer.h lib/token.h lib/utils.h lib/valueflow.h
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$(libcppdir)/programmemory.o: lib/programmemory.cpp lib/astutils.h lib/calculate.h lib/config.h lib/errortypes.h lib/importproject.h lib/library.h lib/mathlib.h lib/platform.h lib/programmemory.h lib/settings.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/timer.h lib/token.h lib/utils.h lib/valueflow.h
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$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CPPFILESDIR) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -c -o $(libcppdir)/programmemory.o $(libcppdir)/programmemory.cpp
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$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CPPFILESDIR) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -c -o $(libcppdir)/programmemory.o $(libcppdir)/programmemory.cpp
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$(libcppdir)/reverseanalyzer.o: lib/reverseanalyzer.cpp lib/analyzer.h lib/astutils.h lib/config.h lib/errortypes.h lib/forwardanalyzer.h lib/importproject.h lib/library.h lib/mathlib.h lib/platform.h lib/reverseanalyzer.h lib/settings.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/timer.h lib/token.h lib/utils.h lib/valueflow.h lib/valueptr.h
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$(libcppdir)/reverseanalyzer.o: lib/reverseanalyzer.cpp lib/analyzer.h lib/astutils.h lib/config.h lib/errortypes.h lib/forwardanalyzer.h lib/importproject.h lib/library.h lib/mathlib.h lib/platform.h lib/reverseanalyzer.h lib/settings.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/timer.h lib/token.h lib/utils.h lib/valueflow.h lib/valueptr.h
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@ -578,7 +578,7 @@ $(libcppdir)/tokenlist.o: lib/tokenlist.cpp externals/simplecpp/simplecpp.h lib/
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$(libcppdir)/utils.o: lib/utils.cpp lib/config.h lib/utils.h
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$(libcppdir)/utils.o: lib/utils.cpp lib/config.h lib/utils.h
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$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CPPFILESDIR) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -c -o $(libcppdir)/utils.o $(libcppdir)/utils.cpp
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$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CPPFILESDIR) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -c -o $(libcppdir)/utils.o $(libcppdir)/utils.cpp
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$(libcppdir)/valueflow.o: lib/valueflow.cpp lib/analyzer.h lib/astutils.h lib/check.h lib/checkuninitvar.h lib/color.h lib/config.h lib/ctu.h lib/errorlogger.h lib/errortypes.h lib/forwardanalyzer.h lib/importproject.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/programmemory.h lib/reverseanalyzer.h lib/settings.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/timer.h lib/token.h lib/tokenlist.h lib/utils.h lib/valueflow.h lib/valueptr.h
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$(libcppdir)/valueflow.o: lib/valueflow.cpp lib/analyzer.h lib/astutils.h lib/calculate.h lib/check.h lib/checkuninitvar.h lib/color.h lib/config.h lib/ctu.h lib/errorlogger.h lib/errortypes.h lib/forwardanalyzer.h lib/importproject.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/programmemory.h lib/reverseanalyzer.h lib/settings.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/timer.h lib/token.h lib/tokenlist.h lib/utils.h lib/valueflow.h lib/valueptr.h
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$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CPPFILESDIR) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -c -o $(libcppdir)/valueflow.o $(libcppdir)/valueflow.cpp
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$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CPPFILESDIR) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -c -o $(libcppdir)/valueflow.o $(libcppdir)/valueflow.cpp
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cli/cmdlineparser.o: cli/cmdlineparser.cpp cli/cmdlineparser.h cli/cppcheckexecutor.h cli/filelister.h cli/threadexecutor.h externals/tinyxml2/tinyxml2.h lib/check.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/importproject.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/utils.h
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cli/cmdlineparser.o: cli/cmdlineparser.cpp cli/cmdlineparser.h cli/cppcheckexecutor.h cli/filelister.h cli/threadexecutor.h externals/tinyxml2/tinyxml2.h lib/check.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/importproject.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/utils.h
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@ -0,0 +1,120 @@
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/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2021 Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef calculateH
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#define calculateH
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#include "mathlib.h"
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#include <string>
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template<class T>
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bool isEqual(T x, T y)
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{
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return x == y;
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}
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inline bool isEqual(double x, double y)
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{
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const double diff = (x > y) ? x - y : y - x;
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return !((diff / 2) < diff);
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}
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inline bool isEqual(float x, float y)
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{
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return isEqual(double{x}, double{y});
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}
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template<class T>
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bool isZero(T x)
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{
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return isEqual<T>(x, T(0));
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}
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template<class R, class T>
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R calculate(const std::string& s, const T& x, const T& y, bool* error = nullptr)
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{
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auto wrap = [](T z) {
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return R{z};
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};
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switch (MathLib::encodeMultiChar(s)) {
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case '+':
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return wrap(x + y);
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case '-':
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return wrap(x - y);
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case '*':
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return wrap(x * y);
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case '/':
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if (isZero(y)) {
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if (error)
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*error = true;
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return R{};
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}
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return wrap(x / y);
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case '%':
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if (isZero(y)) {
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if (error)
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*error = true;
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return R{};
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}
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return wrap(MathLib::bigint(x) % MathLib::bigint(y));
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case '&':
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return wrap(MathLib::bigint(x) & MathLib::bigint(y));
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case '|':
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return wrap(MathLib::bigint(x) | MathLib::bigint(y));
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case '^':
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return wrap(MathLib::bigint(x) ^ MathLib::bigint(y));
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case '>':
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return wrap(x > y);
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case '<':
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return wrap(x < y);
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case '<<':
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if (y >= sizeof(MathLib::bigint) * 8 || y < 0 || x < 0) {
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if (error)
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*error = true;
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return R{};
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}
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return wrap(MathLib::bigint(x) << MathLib::bigint(y));
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case '>>':
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if (y >= sizeof(MathLib::bigint) * 8 || y < 0 || x < 0) {
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if (error)
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*error = true;
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return R{};
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}
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return wrap(MathLib::bigint(x) >> MathLib::bigint(y));
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case '&&':
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return wrap(!isZero(x) && !isZero(y));
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case '||':
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return wrap(!isZero(x) || !isZero(y));
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case '==':
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return wrap(isEqual(x, y));
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case '!=':
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return wrap(!isEqual(x, y));
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case '>=':
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return wrap(x >= y);
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case '<=':
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return wrap(x <= y);
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}
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throw InternalError(nullptr, "Unknown operator: " + s);
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}
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template<class T>
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T calculate(const std::string& s, const T& x, const T& y, bool* error = nullptr)
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{
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return calculate<T, T>(s, x, y, error);
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}
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#endif
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@ -1,13 +1,16 @@
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#include "programmemory.h"
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#include "programmemory.h"
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#include "astutils.h"
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#include "astutils.h"
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#include "calculate.h"
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#include "errortypes.h"
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#include "mathlib.h"
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#include "mathlib.h"
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#include "symboldatabase.h"
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#include "settings.h"
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#include "settings.h"
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#include "symboldatabase.h"
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#include "token.h"
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#include "token.h"
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#include "valueflow.h"
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#include "valueflow.h"
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#include <algorithm>
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#include <algorithm>
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#include <cassert>
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#include <cassert>
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#include <cmath>
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#include <functional>
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#include <functional>
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#include <limits>
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#include <limits>
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#include <memory>
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#include <memory>
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@ -36,9 +39,12 @@ bool ProgramMemory::getIntValue(nonneg int exprid, MathLib::bigint* result) cons
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return false;
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return false;
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}
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}
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void ProgramMemory::setIntValue(nonneg int exprid, MathLib::bigint value)
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void ProgramMemory::setIntValue(nonneg int exprid, MathLib::bigint value, bool impossible)
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{
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{
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values[exprid] = ValueFlow::Value(value);
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ValueFlow::Value v(value);
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if (impossible)
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v.setImpossible();
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values[exprid] = v;
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}
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}
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bool ProgramMemory::getTokValue(nonneg int exprid, const Token** result) const
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bool ProgramMemory::getTokValue(nonneg int exprid, const Token** result) const
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@ -175,10 +181,6 @@ void programMemoryParseCondition(ProgramMemory& pm, const Token* tok, const Toke
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return std::vector<MathLib::bigint>{};
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return std::vector<MathLib::bigint>{};
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};
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};
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if (Token::Match(tok, "==|>=|<=|<|>|!=")) {
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if (Token::Match(tok, "==|>=|<=|<|>|!=")) {
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if (then && !Token::Match(tok, "==|>=|<=|<|>"))
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return;
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if (!then && !Token::Match(tok, "<|>|!="))
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return;
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ValueFlow::Value truevalue;
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ValueFlow::Value truevalue;
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ValueFlow::Value falsevalue;
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ValueFlow::Value falsevalue;
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const Token* vartok = parseCompareInt(tok, truevalue, falsevalue, eval);
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const Token* vartok = parseCompareInt(tok, truevalue, falsevalue, eval);
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@ -191,8 +193,7 @@ void programMemoryParseCondition(ProgramMemory& pm, const Token* tok, const Toke
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if (endTok && isExpressionChanged(vartok, tok->next(), endTok, settings, true))
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if (endTok && isExpressionChanged(vartok, tok->next(), endTok, settings, true))
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return;
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return;
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bool impossible = (tok->str() == "==" && !then) || (tok->str() == "!=" && then);
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bool impossible = (tok->str() == "==" && !then) || (tok->str() == "!=" && then);
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if (!impossible)
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pm.setIntValue(vartok->exprId(), then ? truevalue.intvalue : falsevalue.intvalue, impossible);
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pm.setIntValue(vartok->exprId(), then ? truevalue.intvalue : falsevalue.intvalue);
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const Token* containerTok = settings->library.getContainerFromYield(vartok, Library::Container::Yield::SIZE);
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const Token* containerTok = settings->library.getContainerFromYield(vartok, Library::Container::Yield::SIZE);
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if (containerTok)
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if (containerTok)
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pm.setContainerSizeValue(containerTok->exprId(), then ? truevalue.intvalue : falsevalue.intvalue, !impossible);
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pm.setContainerSizeValue(containerTok->exprId(), then ? truevalue.intvalue : falsevalue.intvalue, !impossible);
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@ -456,294 +457,234 @@ ProgramMemory getProgramMemory(const Token* tok, nonneg int exprid, const ValueF
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return programMemory;
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return programMemory;
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}
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}
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static PMEvaluateFunction evaluateAsInt(PMEvaluateFunction f, ValueFlow::Value::ValueType t)
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static bool isNumericValue(const ValueFlow::Value& value) {
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{
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return value.isIntValue() || value.isFloatValue();
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return [=](const Token* expr, ProgramMemory* const programMemory, MathLib::bigint* result) -> bool {
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const ValueFlow::Value* value = expr->getKnownValue(t);
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if (!value)
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value = programMemory->getValue(expr->exprId());
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if (value && value->valueType == t)
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{
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*result = value->intvalue;
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return true;
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}
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return f && f(expr, programMemory, result);
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};
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}
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}
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static std::set<ValueFlow::Value::ValueType> findIteratorTypes(const ProgramMemory& pm)
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static double asFloat(const ValueFlow::Value& value)
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{
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{
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std::set<ValueFlow::Value::ValueType> result;
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return value.isFloatValue() ? value.floatValue : value.intvalue;
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for (auto&& p : pm.values) {
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}
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if (p.second.isIteratorValue())
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result.insert(p.second.valueType);
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static std::string removeAssign(const std::string& assign) {
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if (result.size() == 2)
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return std::string{assign.begin(), assign.end() - 1};
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break;
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}
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struct assign {
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template<class T, class U>
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void operator()(T& x, const U& y) const
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{
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x = y;
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}
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};
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static ValueFlow::Value evaluate(const std::string& op, const ValueFlow::Value& lhs, const ValueFlow::Value& rhs)
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{
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ValueFlow::Value result;
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if (lhs.isImpossible() && rhs.isImpossible())
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return ValueFlow::Value::unknown();
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if (lhs.isImpossible() || rhs.isImpossible()) {
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// noninvertible
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if (contains({"%", "/", "&", "|"}, op))
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return ValueFlow::Value::unknown();
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result.setImpossible();
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}
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if (isNumericValue(lhs) && isNumericValue(rhs)) {
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if (lhs.isFloatValue() || rhs.isFloatValue()) {
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result.valueType = ValueFlow::Value::ValueType::FLOAT;
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bool error = false;
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result.floatValue = calculate(op, asFloat(lhs), asFloat(rhs), &error);
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if (error)
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return ValueFlow::Value::unknown();
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return result;
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}
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}
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result.valueType = ValueFlow::Value::ValueType::INT;
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if (op == "+") {
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if (lhs.isIteratorValue())
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result.valueType = lhs.valueType;
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else if (rhs.isIteratorValue())
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result.valueType = rhs.valueType;
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} else if (lhs.valueType != rhs.valueType) {
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return ValueFlow::Value::unknown();
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}
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bool error = false;
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result.intvalue = calculate(op, lhs.intvalue, rhs.intvalue, &error);
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if (error)
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return ValueFlow::Value::unknown();
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if (result.isImpossible()) {
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if ((result.intvalue == 0 && op == "!=") || (result.intvalue != 0 && op == "==")) {
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result.setPossible();
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result.intvalue = !result.intvalue;
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}
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}
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}
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return result;
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return result;
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}
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}
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static bool isIterator(const Token* expr)
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static ValueFlow::Value execute(const Token* expr, ProgramMemory& pm)
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{
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{
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|
ValueFlow::Value unknown = ValueFlow::Value::unknown();
|
||||||
|
const ValueFlow::Value* value = nullptr;
|
||||||
if (!expr)
|
if (!expr)
|
||||||
return false;
|
return unknown;
|
||||||
if (astIsIterator(expr))
|
|
||||||
return true;
|
|
||||||
return std::any_of(expr->values().begin(), expr->values().end(), std::mem_fn(&ValueFlow::Value::isIteratorValue));
|
|
||||||
}
|
|
||||||
|
|
||||||
void execute(const Token* expr,
|
|
||||||
ProgramMemory* const programMemory,
|
|
||||||
MathLib::bigint* result,
|
|
||||||
bool* error,
|
|
||||||
const PMEvaluateFunction& f)
|
|
||||||
{
|
|
||||||
if (!expr)
|
|
||||||
*error = true;
|
|
||||||
|
|
||||||
else if (f && f(expr, programMemory, result))
|
|
||||||
*error = false;
|
|
||||||
|
|
||||||
else if (expr->hasKnownIntValue() && !expr->isAssignmentOp()) {
|
else if (expr->hasKnownIntValue() && !expr->isAssignmentOp()) {
|
||||||
*result = expr->values().front().intvalue;
|
return expr->values().front();
|
||||||
}
|
} else if ((value = expr->getKnownValue(ValueFlow::Value::ValueType::FLOAT)) ||
|
||||||
|
(value = expr->getKnownValue(ValueFlow::Value::ValueType::ITERATOR_START)) ||
|
||||||
else if (expr->isNumber()) {
|
(value = expr->getKnownValue(ValueFlow::Value::ValueType::ITERATOR_END)) ||
|
||||||
*result = MathLib::toLongNumber(expr->str());
|
(value = expr->getKnownValue(ValueFlow::Value::ValueType::CONTAINER_SIZE))) {
|
||||||
|
return *value;
|
||||||
|
} else if (expr->isNumber()) {
|
||||||
if (MathLib::isFloat(expr->str()))
|
if (MathLib::isFloat(expr->str()))
|
||||||
*error = true;
|
return unknown;
|
||||||
}
|
return ValueFlow::Value{MathLib::toLongNumber(expr->str())};
|
||||||
|
} else if (Token::Match(expr->tokAt(-2), ". %name% (") && astIsContainer(expr->tokAt(-2)->astOperand1())) {
|
||||||
else if (expr->varId() > 0) {
|
const Token* containerTok = expr->tokAt(-2)->astOperand1();
|
||||||
if (!programMemory->getIntValue(expr->varId(), result))
|
|
||||||
*error = true;
|
|
||||||
}
|
|
||||||
|
|
||||||
else if (Token::Match(expr->tokAt(-3), "%var% . %name% (") && astIsContainer(expr->tokAt(-3))) {
|
|
||||||
const Token* containerTok = expr->tokAt(-3);
|
|
||||||
Library::Container::Yield yield = containerTok->valueType()->container->getYield(expr->strAt(-1));
|
Library::Container::Yield yield = containerTok->valueType()->container->getYield(expr->strAt(-1));
|
||||||
if (yield == Library::Container::Yield::SIZE) {
|
if (yield == Library::Container::Yield::SIZE) {
|
||||||
if (!programMemory->getContainerSizeValue(containerTok->exprId(), result))
|
ValueFlow::Value v = execute(containerTok, pm);
|
||||||
*error = true;
|
if (!v.isContainerSizeValue())
|
||||||
|
return unknown;
|
||||||
|
v.valueType = ValueFlow::Value::ValueType::INT;
|
||||||
|
return v;
|
||||||
} else if (yield == Library::Container::Yield::EMPTY) {
|
} else if (yield == Library::Container::Yield::EMPTY) {
|
||||||
if (!programMemory->getContainerEmptyValue(containerTok->exprId(), result))
|
ValueFlow::Value v = execute(containerTok, pm);
|
||||||
*error = true;
|
if (!v.isContainerSizeValue())
|
||||||
} else {
|
return unknown;
|
||||||
*error = true;
|
if (v.isImpossible() && v.intvalue == 0)
|
||||||
|
return ValueFlow::Value{0};
|
||||||
|
else if (!v.isImpossible())
|
||||||
|
return ValueFlow::Value{v.intvalue == 0};
|
||||||
}
|
}
|
||||||
}
|
} else if (expr->isAssignmentOp() && expr->astOperand1() && expr->astOperand2() && expr->astOperand1()->exprId() > 0) {
|
||||||
|
ValueFlow::Value rhs = execute(expr->astOperand2(), pm);
|
||||||
else if (expr->exprId() > 0 && programMemory->hasValue(expr->exprId())) {
|
if (rhs.isUninitValue())
|
||||||
if (!programMemory->getIntValue(expr->exprId(), result))
|
return unknown;
|
||||||
*error = true;
|
if (expr->str() != "=") {
|
||||||
}
|
if (!pm.hasValue(expr->astOperand1()->exprId()))
|
||||||
|
return unknown;
|
||||||
else if (expr->isComparisonOp()) {
|
ValueFlow::Value& lhs = pm.values.at(expr->astOperand1()->exprId());
|
||||||
MathLib::bigint result1(0), result2(0);
|
rhs = evaluate(removeAssign(expr->str()), lhs, rhs);
|
||||||
bool error1 = false;
|
if (lhs.isIntValue())
|
||||||
bool error2 = false;
|
ValueFlow::Value::visitValue(rhs, std::bind(assign{}, std::ref(lhs.intvalue), std::placeholders::_1));
|
||||||
execute(expr->astOperand1(), programMemory, &result1, &error1, f);
|
else if (lhs.isFloatValue())
|
||||||
execute(expr->astOperand2(), programMemory, &result2, &error2, f);
|
ValueFlow::Value::visitValue(rhs, std::bind(assign{}, std::ref(lhs.floatValue), std::placeholders::_1));
|
||||||
if (error1 && error2 && (isIterator(expr->astOperand1()) || isIterator(expr->astOperand2()))) {
|
|
||||||
for (ValueFlow::Value::ValueType t : findIteratorTypes(*programMemory)) {
|
|
||||||
execute(expr->astOperand1(), programMemory, &result1, &error1, evaluateAsInt(f, t));
|
|
||||||
execute(expr->astOperand2(), programMemory, &result2, &error2, evaluateAsInt(f, t));
|
|
||||||
if (!error1 && !error2)
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
if (error1 && error2) {
|
|
||||||
*error = true;
|
|
||||||
} else if (error1 && !error2) {
|
|
||||||
ValueFlow::Value v = inferCondition(expr->str(), expr->astOperand1(), result2);
|
|
||||||
*error = !v.isKnown();
|
|
||||||
*result = v.intvalue;
|
|
||||||
} else if (!error1 && error2) {
|
|
||||||
ValueFlow::Value v = inferCondition(expr->str(), result1, expr->astOperand2());
|
|
||||||
*error = !v.isKnown();
|
|
||||||
*result = v.intvalue;
|
|
||||||
} else {
|
|
||||||
if (expr->str() == "<")
|
|
||||||
*result = result1 < result2;
|
|
||||||
else if (expr->str() == "<=")
|
|
||||||
*result = result1 <= result2;
|
|
||||||
else if (expr->str() == ">")
|
|
||||||
*result = result1 > result2;
|
|
||||||
else if (expr->str() == ">=")
|
|
||||||
*result = result1 >= result2;
|
|
||||||
else if (expr->str() == "==")
|
|
||||||
*result = result1 == result2;
|
|
||||||
else if (expr->str() == "!=")
|
|
||||||
*result = result1 != result2;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
else if (expr->isAssignmentOp()) {
|
|
||||||
execute(expr->astOperand2(), programMemory, result, error, f);
|
|
||||||
if (!expr->astOperand1() || !expr->astOperand1()->exprId())
|
|
||||||
*error = true;
|
|
||||||
if (*error)
|
|
||||||
return;
|
|
||||||
|
|
||||||
if (expr->str() == "=") {
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), *result);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
long long intValue;
|
|
||||||
if (!programMemory->getIntValue(expr->astOperand1()->exprId(), &intValue)) {
|
|
||||||
*error = true;
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
if (expr->str() == "+=")
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), intValue + *result);
|
|
||||||
else if (expr->str() == "-=")
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), intValue - *result);
|
|
||||||
else if (expr->str() == "*=")
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), intValue * *result);
|
|
||||||
else if (expr->str() == "/=" && *result != 0)
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), intValue / *result);
|
|
||||||
else if (expr->str() == "%=" && *result != 0)
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), intValue % *result);
|
|
||||||
else if (expr->str() == "&=")
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), intValue & *result);
|
|
||||||
else if (expr->str() == "|=")
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), intValue | *result);
|
|
||||||
else if (expr->str() == "^=")
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), intValue ^ *result);
|
|
||||||
}
|
|
||||||
|
|
||||||
else if (Token::Match(expr, "++|--")) {
|
|
||||||
if (!expr->astOperand1() || expr->astOperand1()->exprId() == 0)
|
|
||||||
*error = true;
|
|
||||||
else {
|
|
||||||
long long intValue;
|
|
||||||
if (!programMemory->getIntValue(expr->astOperand1()->exprId(), &intValue))
|
|
||||||
*error = true;
|
|
||||||
else {
|
|
||||||
if (intValue == 0 &&
|
|
||||||
expr->str() == "--" &&
|
|
||||||
expr->astOperand1()->variable() &&
|
|
||||||
expr->astOperand1()->variable()->isUnsigned())
|
|
||||||
*error = true; // overflow
|
|
||||||
*result = intValue + (expr->str() == "++" ? 1 : -1);
|
|
||||||
programMemory->setIntValue(expr->astOperand1()->exprId(), *result);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
else if (expr->str() == "&&") {
|
|
||||||
bool error1 = false;
|
|
||||||
execute(expr->astOperand1(), programMemory, result, &error1, f);
|
|
||||||
if (!error1 && *result == 0)
|
|
||||||
*result = 0;
|
|
||||||
else {
|
|
||||||
bool error2 = false;
|
|
||||||
execute(expr->astOperand2(), programMemory, result, &error2, f);
|
|
||||||
if (error1 || error2)
|
|
||||||
*error = true;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
else if (expr->str() == "||") {
|
|
||||||
execute(expr->astOperand1(), programMemory, result, error, f);
|
|
||||||
if (*result == 1 && *error == false)
|
|
||||||
*result = 1;
|
|
||||||
else if (*result == 0 && *error == false)
|
|
||||||
execute(expr->astOperand2(), programMemory, result, error, f);
|
|
||||||
} else if (expr->isConstOp() && expr->astOperand1() && expr->astOperand2()) {
|
|
||||||
MathLib::bigint result1(0), result2(0);
|
|
||||||
execute(expr->astOperand1(), programMemory, &result1, error, f);
|
|
||||||
execute(expr->astOperand2(), programMemory, &result2, error, f);
|
|
||||||
if (expr->str() == "+")
|
|
||||||
*result = result1 + result2;
|
|
||||||
else if (expr->str() == "-")
|
|
||||||
*result = result1 - result2;
|
|
||||||
else if (expr->str() == "*") {
|
|
||||||
if (result2 && (result1 > std::numeric_limits<MathLib::bigint>::max()/result2))
|
|
||||||
*error = true;
|
|
||||||
else
|
else
|
||||||
*result = result1 * result2;
|
return unknown;
|
||||||
} else if (result2 == 0)
|
return lhs;
|
||||||
*error = true;
|
|
||||||
else if (expr->str() == "/")
|
|
||||||
*result = result1 / result2;
|
|
||||||
else if (expr->str() == "%")
|
|
||||||
*result = result1 % result2;
|
|
||||||
else if (expr->str() == "<<") {
|
|
||||||
if (result2 < 0 || result1 < 0 || result2 >= MathLib::bigint_bits) { // don't perform UB
|
|
||||||
*error= true;
|
|
||||||
} else {
|
} else {
|
||||||
*result = result1 << result2;
|
pm.values[expr->astOperand1()->exprId()] = rhs;
|
||||||
|
return rhs;
|
||||||
}
|
}
|
||||||
} else if (expr->str() == ">>") {
|
} else if (expr->str() == "&&" && expr->astOperand1() && expr->astOperand2()) {
|
||||||
if (result2 < 0 || result2 >= MathLib::bigint_bits) { // don't perform UB
|
ValueFlow::Value lhs = execute(expr->astOperand1(), pm);
|
||||||
*error=true;
|
if (!lhs.isIntValue())
|
||||||
} else {
|
return unknown;
|
||||||
*result = result1 >> result2;
|
if (lhs.intvalue == 0)
|
||||||
}
|
return lhs;
|
||||||
} else if (expr->str() == "&") {
|
return execute(expr->astOperand2(), pm);
|
||||||
*result = result1 & result2;
|
} else if (expr->str() == "||" && expr->astOperand1() && expr->astOperand2()) {
|
||||||
} else if (expr->str() == "|") {
|
ValueFlow::Value lhs = execute(expr->astOperand1(), pm);
|
||||||
*result = result1 | result2;
|
if (!lhs.isIntValue())
|
||||||
} else {
|
return unknown;
|
||||||
*error = true;
|
if (lhs.intvalue != 0)
|
||||||
}
|
return lhs;
|
||||||
}
|
return execute(expr->astOperand2(), pm);
|
||||||
|
|
||||||
else if (expr->str() == "!") {
|
|
||||||
execute(expr->astOperand1(), programMemory, result, error, f);
|
|
||||||
*result = !(*result);
|
|
||||||
} else if (expr->isUnaryOp("-")) {
|
|
||||||
execute(expr->astOperand1(), programMemory, result, error, f);
|
|
||||||
*result = -(*result);
|
|
||||||
} else if (expr->isUnaryOp("+")) {
|
|
||||||
execute(expr->astOperand1(), programMemory, result, error, f);
|
|
||||||
} else if (expr->str() == "," && expr->astOperand1() && expr->astOperand2()) {
|
} else if (expr->str() == "," && expr->astOperand1() && expr->astOperand2()) {
|
||||||
execute(expr->astOperand1(), programMemory, result, error, f);
|
execute(expr->astOperand1(), pm);
|
||||||
execute(expr->astOperand2(), programMemory, result, error, f);
|
return execute(expr->astOperand2(), pm);
|
||||||
}
|
} else if (Token::Match(expr, "++|--") && expr->astOperand1() && expr->astOperand1()->exprId() != 0) {
|
||||||
|
if (!pm.hasValue(expr->astOperand1()->exprId()))
|
||||||
|
return unknown;
|
||||||
|
ValueFlow::Value& lhs = pm.values.at(expr->astOperand1()->exprId());
|
||||||
|
if (!lhs.isIntValue())
|
||||||
|
return unknown;
|
||||||
|
// overflow
|
||||||
|
if (!lhs.isImpossible() && lhs.intvalue == 0 && expr->str() == "--" && astIsUnsigned(expr->astOperand1()))
|
||||||
|
return unknown;
|
||||||
|
|
||||||
else if (expr->str() == "[" && expr->astOperand1() && expr->astOperand2()) {
|
if (expr->str() == "++")
|
||||||
|
lhs.intvalue++;
|
||||||
|
else
|
||||||
|
lhs.intvalue--;
|
||||||
|
return lhs;
|
||||||
|
} else if (expr->str() == "[" && expr->astOperand1() && expr->astOperand2()) {
|
||||||
const Token *tokvalue = nullptr;
|
const Token *tokvalue = nullptr;
|
||||||
if (!programMemory->getTokValue(expr->astOperand1()->exprId(), &tokvalue)) {
|
if (!pm.getTokValue(expr->astOperand1()->exprId(), &tokvalue)) {
|
||||||
auto tokvalue_it = std::find_if(expr->astOperand1()->values().begin(),
|
auto tokvalue_it = std::find_if(expr->astOperand1()->values().begin(),
|
||||||
expr->astOperand1()->values().end(),
|
expr->astOperand1()->values().end(),
|
||||||
std::mem_fn(&ValueFlow::Value::isTokValue));
|
std::mem_fn(&ValueFlow::Value::isTokValue));
|
||||||
if (tokvalue_it == expr->astOperand1()->values().end()) {
|
if (tokvalue_it == expr->astOperand1()->values().end()) {
|
||||||
*error = true;
|
return unknown;
|
||||||
return;
|
|
||||||
}
|
}
|
||||||
tokvalue = tokvalue_it->tokvalue;
|
tokvalue = tokvalue_it->tokvalue;
|
||||||
}
|
}
|
||||||
if (!tokvalue || !tokvalue->isLiteral()) {
|
if (!tokvalue || !tokvalue->isLiteral()) {
|
||||||
*error = true;
|
return unknown;
|
||||||
return;
|
|
||||||
}
|
}
|
||||||
const std::string strValue = tokvalue->strValue();
|
const std::string strValue = tokvalue->strValue();
|
||||||
MathLib::bigint index = 0;
|
ValueFlow::Value rhs = execute(expr->astOperand2(), pm);
|
||||||
execute(expr->astOperand2(), programMemory, &index, error, f);
|
if (!rhs.isIntValue())
|
||||||
|
return unknown;
|
||||||
|
MathLib::bigint index = rhs.intvalue;
|
||||||
if (index >= 0 && index < strValue.size())
|
if (index >= 0 && index < strValue.size())
|
||||||
*result = strValue[index];
|
return ValueFlow::Value{strValue[index]};
|
||||||
else if (index == strValue.size())
|
else if (index == strValue.size())
|
||||||
*result = 0;
|
return ValueFlow::Value{};
|
||||||
else
|
} else if (Token::Match(expr, "%cop%") && expr->astOperand1() && expr->astOperand2()) {
|
||||||
*error = true;
|
ValueFlow::Value lhs = execute(expr->astOperand1(), pm);
|
||||||
|
ValueFlow::Value rhs = execute(expr->astOperand2(), pm);
|
||||||
|
if (!lhs.isUninitValue() && !rhs.isUninitValue())
|
||||||
|
return evaluate(expr->str(), lhs, rhs);
|
||||||
|
if (expr->isComparisonOp()) {
|
||||||
|
if (rhs.isIntValue() && !rhs.isImpossible()) {
|
||||||
|
ValueFlow::Value v = inferCondition(expr->str(), expr->astOperand1(), rhs.intvalue);
|
||||||
|
if (v.isKnown())
|
||||||
|
return v;
|
||||||
|
} else if (lhs.isIntValue() && !lhs.isImpossible()) {
|
||||||
|
ValueFlow::Value v = inferCondition(expr->str(), lhs.intvalue, expr->astOperand2());
|
||||||
|
if (v.isKnown())
|
||||||
|
return v;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// Unary ops
|
||||||
|
else if (Token::Match(expr, "!|+|-") && expr->astOperand1() && !expr->astOperand2()) {
|
||||||
|
ValueFlow::Value lhs = execute(expr->astOperand1(), pm);
|
||||||
|
if (!lhs.isIntValue())
|
||||||
|
return unknown;
|
||||||
|
if (expr->str() == "!")
|
||||||
|
lhs.intvalue = !lhs.intvalue;
|
||||||
|
if (expr->str() == "-")
|
||||||
|
lhs.intvalue = -lhs.intvalue;
|
||||||
|
return lhs;
|
||||||
} else if (expr->str() == "?" && expr->astOperand1() && expr->astOperand2()) {
|
} else if (expr->str() == "?" && expr->astOperand1() && expr->astOperand2()) {
|
||||||
execute(expr->astOperand1(), programMemory, result, error, f);
|
ValueFlow::Value cond = execute(expr->astOperand1(), pm);
|
||||||
if (*error)
|
if (!cond.isIntValue())
|
||||||
return;
|
return unknown;
|
||||||
const Token* childTok = expr->astOperand2();
|
const Token* child = expr->astOperand2();
|
||||||
if (*result == 0)
|
if (cond.intvalue == 0)
|
||||||
execute(childTok->astOperand2(), programMemory, result, error, f);
|
return execute(child->astOperand2(), pm);
|
||||||
else
|
else
|
||||||
execute(childTok->astOperand1(), programMemory, result, error, f);
|
return execute(child->astOperand1(), pm);
|
||||||
|
|
||||||
} else if (expr->str() == "(" && expr->isCast()) {
|
} else if (expr->str() == "(" && expr->isCast()) {
|
||||||
if (Token::simpleMatch(expr->previous(), ">") && expr->previous()->link())
|
if (Token::simpleMatch(expr->previous(), ">") && expr->previous()->link())
|
||||||
execute(expr->astOperand2(), programMemory, result, error);
|
return execute(expr->astOperand2(), pm);
|
||||||
else
|
else
|
||||||
execute(expr->astOperand1(), programMemory, result, error);
|
return execute(expr->astOperand1(), pm);
|
||||||
} else
|
}
|
||||||
*error = true;
|
if (expr->exprId() > 0 && pm.hasValue(expr->exprId())) {
|
||||||
|
return pm.values.at(expr->exprId());
|
||||||
|
}
|
||||||
|
|
||||||
|
return unknown;
|
||||||
|
}
|
||||||
|
|
||||||
|
void execute(const Token* expr, ProgramMemory* const programMemory, MathLib::bigint* result, bool* error)
|
||||||
|
{
|
||||||
|
ValueFlow::Value v = execute(expr, *programMemory);
|
||||||
|
if (!v.isIntValue() || v.isImpossible())
|
||||||
|
*error = true;
|
||||||
|
else
|
||||||
|
*result = v.intvalue;
|
||||||
}
|
}
|
||||||
|
|
|
@ -19,7 +19,7 @@ struct ProgramMemory {
|
||||||
const ValueFlow::Value* getValue(nonneg int exprid, bool impossible = false) const;
|
const ValueFlow::Value* getValue(nonneg int exprid, bool impossible = false) const;
|
||||||
|
|
||||||
bool getIntValue(nonneg int exprid, MathLib::bigint* result) const;
|
bool getIntValue(nonneg int exprid, MathLib::bigint* result) const;
|
||||||
void setIntValue(nonneg int exprid, MathLib::bigint value);
|
void setIntValue(nonneg int exprid, MathLib::bigint value, bool impossible = false);
|
||||||
|
|
||||||
bool getContainerSizeValue(nonneg int exprid, MathLib::bigint* result) const;
|
bool getContainerSizeValue(nonneg int exprid, MathLib::bigint* result) const;
|
||||||
bool getContainerEmptyValue(nonneg int exprid, MathLib::bigint* result) const;
|
bool getContainerEmptyValue(nonneg int exprid, MathLib::bigint* result) const;
|
||||||
|
@ -62,14 +62,7 @@ struct ProgramMemoryState {
|
||||||
ProgramMemory get(const Token* tok, const Token* ctx, const ProgramMemory::Map& vars) const;
|
ProgramMemory get(const Token* tok, const Token* ctx, const ProgramMemory::Map& vars) const;
|
||||||
};
|
};
|
||||||
|
|
||||||
using PMEvaluateFunction =
|
void execute(const Token* expr, ProgramMemory* const programMemory, MathLib::bigint* result, bool* error);
|
||||||
std::function<bool (const Token* expr, ProgramMemory* const programMemory, MathLib::bigint* result)>;
|
|
||||||
|
|
||||||
void execute(const Token* expr,
|
|
||||||
ProgramMemory* const programMemory,
|
|
||||||
MathLib::bigint* result,
|
|
||||||
bool* error,
|
|
||||||
const PMEvaluateFunction& f = nullptr);
|
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* Is condition always false when variable has given value?
|
* Is condition always false when variable has given value?
|
||||||
|
|
20
lib/utils.h
20
lib/utils.h
|
@ -23,7 +23,9 @@
|
||||||
|
|
||||||
#include "config.h"
|
#include "config.h"
|
||||||
|
|
||||||
|
#include <algorithm>
|
||||||
#include <cstddef>
|
#include <cstddef>
|
||||||
|
#include <initializer_list>
|
||||||
#include <string>
|
#include <string>
|
||||||
#include <vector>
|
#include <vector>
|
||||||
|
|
||||||
|
@ -41,6 +43,24 @@ struct SelectMapValues {
|
||||||
}
|
}
|
||||||
};
|
};
|
||||||
|
|
||||||
|
template<class Range, class T>
|
||||||
|
bool contains(const Range& r, const T& x)
|
||||||
|
{
|
||||||
|
return std::find(r.begin(), r.end(), x) != r.end();
|
||||||
|
}
|
||||||
|
|
||||||
|
template<class T>
|
||||||
|
bool contains(const std::initializer_list<T>& r, const T& x)
|
||||||
|
{
|
||||||
|
return std::find(r.begin(), r.end(), x) != r.end();
|
||||||
|
}
|
||||||
|
|
||||||
|
template<class T, class U>
|
||||||
|
bool contains(const std::initializer_list<T>& r, const U& x)
|
||||||
|
{
|
||||||
|
return std::find(r.begin(), r.end(), x) != r.end();
|
||||||
|
}
|
||||||
|
|
||||||
// Enum hash for C++11. This is not needed in C++14
|
// Enum hash for C++11. This is not needed in C++14
|
||||||
struct EnumClassHash {
|
struct EnumClassHash {
|
||||||
template<typename T>
|
template<typename T>
|
||||||
|
|
|
@ -79,6 +79,7 @@
|
||||||
|
|
||||||
#include "analyzer.h"
|
#include "analyzer.h"
|
||||||
#include "astutils.h"
|
#include "astutils.h"
|
||||||
|
#include "calculate.h"
|
||||||
#include "checkuninitvar.h"
|
#include "checkuninitvar.h"
|
||||||
#include "config.h"
|
#include "config.h"
|
||||||
#include "errorlogger.h"
|
#include "errorlogger.h"
|
||||||
|
@ -376,98 +377,6 @@ static bool isComputableValue(const Token* parent, const ValueFlow::Value& value
|
||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
|
|
||||||
template<class T>
|
|
||||||
static bool isEqual(T x, T y)
|
|
||||||
{
|
|
||||||
return x == y;
|
|
||||||
}
|
|
||||||
|
|
||||||
template<>
|
|
||||||
bool isEqual<double>(double x, double y)
|
|
||||||
{
|
|
||||||
const double diff = (x > y) ? x - y : y - x;
|
|
||||||
return !((diff / 2) < diff);
|
|
||||||
}
|
|
||||||
|
|
||||||
template<class T>
|
|
||||||
static bool isZero(T x)
|
|
||||||
{
|
|
||||||
return isEqual<T>(x, T(0));
|
|
||||||
}
|
|
||||||
|
|
||||||
template<class R, class T>
|
|
||||||
static R calculate(const std::string& s, const T& x, const T& y, bool* error = nullptr)
|
|
||||||
{
|
|
||||||
auto wrap = [](T z) {
|
|
||||||
return R{z};
|
|
||||||
};
|
|
||||||
switch (MathLib::encodeMultiChar(s)) {
|
|
||||||
case '+':
|
|
||||||
return wrap(x + y);
|
|
||||||
case '-':
|
|
||||||
return wrap(x - y);
|
|
||||||
case '*':
|
|
||||||
return wrap(x * y);
|
|
||||||
case '/':
|
|
||||||
if (isZero(y)) {
|
|
||||||
if (error)
|
|
||||||
*error = true;
|
|
||||||
return R{};
|
|
||||||
}
|
|
||||||
return wrap(x / y);
|
|
||||||
case '%':
|
|
||||||
if (isZero(y)) {
|
|
||||||
if (error)
|
|
||||||
*error = true;
|
|
||||||
return R{};
|
|
||||||
}
|
|
||||||
return wrap(MathLib::bigint(x) % MathLib::bigint(y));
|
|
||||||
case '&':
|
|
||||||
return wrap(MathLib::bigint(x) & MathLib::bigint(y));
|
|
||||||
case '|':
|
|
||||||
return wrap(MathLib::bigint(x) | MathLib::bigint(y));
|
|
||||||
case '^':
|
|
||||||
return wrap(MathLib::bigint(x) ^ MathLib::bigint(y));
|
|
||||||
case '>':
|
|
||||||
return wrap(x > y);
|
|
||||||
case '<':
|
|
||||||
return wrap(x < y);
|
|
||||||
case '<<':
|
|
||||||
if (y >= sizeof(MathLib::bigint) * 8 || y < 0 || x < 0) {
|
|
||||||
if (error)
|
|
||||||
*error = true;
|
|
||||||
return R{};
|
|
||||||
}
|
|
||||||
return wrap(MathLib::bigint(x) << MathLib::bigint(y));
|
|
||||||
case '>>':
|
|
||||||
if (y >= sizeof(MathLib::bigint) * 8 || y < 0 || x < 0) {
|
|
||||||
if (error)
|
|
||||||
*error = true;
|
|
||||||
return R{};
|
|
||||||
}
|
|
||||||
return wrap(MathLib::bigint(x) >> MathLib::bigint(y));
|
|
||||||
case '&&':
|
|
||||||
return wrap(!isZero(x) && !isZero(y));
|
|
||||||
case '||':
|
|
||||||
return wrap(!isZero(x) || !isZero(y));
|
|
||||||
case '==':
|
|
||||||
return wrap(isEqual(x, y));
|
|
||||||
case '!=':
|
|
||||||
return wrap(!isEqual(x, y));
|
|
||||||
case '>=':
|
|
||||||
return wrap(x >= y);
|
|
||||||
case '<=':
|
|
||||||
return wrap(x <= y);
|
|
||||||
}
|
|
||||||
throw InternalError(nullptr, "Unknown operator: " + s);
|
|
||||||
}
|
|
||||||
|
|
||||||
template<class T>
|
|
||||||
static T calculate(const std::string& s, const T& x, const T& y, bool* error = nullptr)
|
|
||||||
{
|
|
||||||
return calculate<T, T>(s, x, y, error);
|
|
||||||
}
|
|
||||||
|
|
||||||
/** Set token value for cast */
|
/** Set token value for cast */
|
||||||
static void setTokenValueCast(Token *parent, const ValueType &valueType, const ValueFlow::Value &value, const Settings *settings);
|
static void setTokenValueCast(Token *parent, const ValueType &valueType, const ValueFlow::Value &value, const Settings *settings);
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue