container-modeling.cpp
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// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=core,cplusplus,debug.DebugIteratorModeling,debug.ExprInspection -analyzer-config aggressive-binary-operation-simplification=true -analyzer-config c++-container-inlining=false %s -analyzer-output=text -verify
// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=core,cplusplus,debug.DebugIteratorModeling,debug.ExprInspection -analyzer-config aggressive-binary-operation-simplification=true -analyzer-config c++-container-inlining=true -DINLINE=1 %s -analyzer-output=text -verify
// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=core,cplusplus,alpha.cplusplus.IteratorModeling,debug.ExprInspection -analyzer-config aggressive-binary-operation-simplification=true %s 2>&1 | FileCheck %s
#include "Inputs/system-header-simulator-cxx.h"
template <typename Container>
long clang_analyzer_container_begin(const Container&);
template <typename Container>
long clang_analyzer_container_end(const Container&);
void clang_analyzer_denote(long, const char*);
void clang_analyzer_express(long);
void clang_analyzer_eval(bool);
void clang_analyzer_warnIfReached();
void begin(const std::vector<int> &V) {
V.begin();
clang_analyzer_denote(clang_analyzer_container_begin(V), "$V.begin()");
clang_analyzer_express(clang_analyzer_container_begin(V)); // expected-warning{{$V.begin()}}
// expected-note@-1{{$V.begin()}}
}
void end(const std::vector<int> &V) {
V.end();
clang_analyzer_denote(clang_analyzer_container_end(V), "$V.end()");
clang_analyzer_express(clang_analyzer_container_end(V)); // expected-warning{{$V.end()}}
// expected-note@-1{{$V.end()}}
}
////////////////////////////////////////////////////////////////////////////////
///
/// C O N T A I N E R A S S I G N M E N T S
///
////////////////////////////////////////////////////////////////////////////////
// Move
void move_assignment(std::vector<int> &V1, std::vector<int> &V2) {
V1.cbegin();
V1.cend();
V2.cbegin();
V2.cend();
long B1 = clang_analyzer_container_begin(V1);
long E1 = clang_analyzer_container_end(V1);
long B2 = clang_analyzer_container_begin(V2);
long E2 = clang_analyzer_container_end(V2);
V1 = std::move(V2);
clang_analyzer_eval(clang_analyzer_container_begin(V1) == B2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(clang_analyzer_container_end(V2) == E2); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
}
////////////////////////////////////////////////////////////////////////////////
///
/// C O N T A I N E R M O D I F I E R S
///
////////////////////////////////////////////////////////////////////////////////
/// push_back()
///
/// Design decision: extends containers to the ->BACK-> (i.e. the
/// past-the-end position of the container is incremented).
void clang_analyzer_dump(void*);
void push_back(std::vector<int> &V, int n) {
V.cbegin();
V.cend();
clang_analyzer_denote(clang_analyzer_container_begin(V), "$V.begin()");
clang_analyzer_denote(clang_analyzer_container_end(V), "$V.end()");
V.push_back(n); // expected-note 2{{Container 'V' extended to the back by 1 position}}
clang_analyzer_express(clang_analyzer_container_begin(V)); // expected-warning{{$V.begin()}}
// expected-note@-1{{$V.begin()}}
clang_analyzer_express(clang_analyzer_container_end(V)); // expected-warning{{$V.end() + 1}}
// expected-note@-1{{$V.end() + 1}}
}
/// emplace_back()
///
/// Design decision: extends containers to the ->BACK-> (i.e. the
/// past-the-end position of the container is incremented).
void emplace_back(std::vector<int> &V, int n) {
V.cbegin();
V.cend();
clang_analyzer_denote(clang_analyzer_container_begin(V), "$V.begin()");
clang_analyzer_denote(clang_analyzer_container_end(V), "$V.end()");
V.emplace_back(n); // expected-note 2{{Container 'V' extended to the back by 1 position}}
clang_analyzer_express(clang_analyzer_container_begin(V)); // expected-warning{{$V.begin()}}
// expected-note@-1{{$V.begin()}}
clang_analyzer_express(clang_analyzer_container_end(V)); // expected-warning{{$V.end() + 1}}
// expected-note@-1{{$V.end() + 1}}
}
/// pop_back()
///
/// Design decision: shrinks containers to the <-FRONT<- (i.e. the
/// past-the-end position of the container is decremented).
void pop_back(std::vector<int> &V, int n) {
V.cbegin();
V.cend();
clang_analyzer_denote(clang_analyzer_container_begin(V), "$V.begin()");
clang_analyzer_denote(clang_analyzer_container_end(V), "$V.end()");
V.pop_back(); // expected-note 2{{Container 'V' shrank from the back by 1 position}}
clang_analyzer_express(clang_analyzer_container_begin(V)); // expected-warning{{$V.begin()}}
// expected-note@-1{{$V.begin()}}
clang_analyzer_express(clang_analyzer_container_end(V)); // expected-warning{{$V.end() - 1}}
// expected-note@-1{{$V.end() - 1}}
}
/// push_front()
///
/// Design decision: extends containers to the <-FRONT<- (i.e. the first
/// position of the container is decremented).
void push_front(std::list<int> &L, int n) {
L.cbegin();
L.cend();
clang_analyzer_denote(clang_analyzer_container_begin(L), "$L.begin()");
clang_analyzer_denote(clang_analyzer_container_end(L), "$L.end()");
L.push_front(n); // expected-note 2{{Container 'L' extended to the front by 1 position}}
clang_analyzer_express(clang_analyzer_container_begin(L)); // expected-warning{{$L.begin() - 1}}
// expected-note@-1{{$L.begin() - 1}}
clang_analyzer_express(clang_analyzer_container_end(L)); // expected-warning{{$L.end()}}
// expected-note@-1{{$L.end()}}
}
/// emplace_front()
///
/// Design decision: extends containers to the <-FRONT<- (i.e. the first
/// position of the container is decremented).
void emplace_front(std::list<int> &L, int n) {
L.cbegin();
L.cend();
clang_analyzer_denote(clang_analyzer_container_begin(L), "$L.begin()");
clang_analyzer_denote(clang_analyzer_container_end(L), "$L.end()");
L.emplace_front(n); // expected-note 2{{Container 'L' extended to the front by 1 position}}
clang_analyzer_express(clang_analyzer_container_begin(L)); // expected-warning{{$L.begin() - 1}}
// expected-note@-1{{$L.begin() - 1}}
clang_analyzer_express(clang_analyzer_container_end(L)); // expected-warning{{$L.end()}}
// expected-note@-1{{$L.end()}}
}
/// pop_front()
///
/// Design decision: shrinks containers to the ->BACK-> (i.e. the first
/// position of the container is incremented).
void pop_front(std::list<int> &L, int n) {
L.cbegin();
L.cend();
clang_analyzer_denote(clang_analyzer_container_begin(L), "$L.begin()");
clang_analyzer_denote(clang_analyzer_container_end(L), "$L.end()");
L.pop_front(); // expected-note 2{{Container 'L' shrank from the front by 1 position}}
clang_analyzer_express(clang_analyzer_container_begin(L)); // expected-warning{{$L.begin() + 1}}
// expected-note@-1{{$L.begin() + 1}}
clang_analyzer_express(clang_analyzer_container_end(L)); // expected-warning{{$L.end()}}
// expected-note@-1{{$L.end()}}
}
////////////////////////////////////////////////////////////////////////////////
///
/// O T H E R T E S T S
///
////////////////////////////////////////////////////////////////////////////////
/// Track local variable
void push_back() {
std::vector<int> V;
V.end();
clang_analyzer_denote(clang_analyzer_container_end(V), "$V.end()");
V.push_back(1); // expected-note{{Container 'V' extended to the back by 1 position}}
clang_analyzer_express(clang_analyzer_container_end(V)); // expected-warning{{$V.end() + 1}}
// expected-note@-1{{$V.end() + 1}}
}
/// Track the right container only
void push_back1(std::vector<int> &V1, std::vector<int> &V2, int n) {
V1.cbegin();
V1.cend();
V2.cbegin();
V2.cend();
clang_analyzer_denote(clang_analyzer_container_begin(V1), "$V1.begin()");
V2.push_back(n); // no-note
clang_analyzer_express(clang_analyzer_container_begin(V1)); // expected-warning{{$V1.begin()}}
// expected-note@-1{{$V1.begin()}}
}
void push_back2(std::vector<int> &V1, std::vector<int> &V2, int n) {
V1.cbegin();
V1.cend();
V2.cbegin();
V2.cend();
clang_analyzer_denote(clang_analyzer_container_begin(V1), "$V1.begin()");
clang_analyzer_denote(clang_analyzer_container_begin(V2), "$V2.begin()");
V1.push_back(n); // expected-note{{Container 'V1' extended to the back by 1 position}}
// Only once!
clang_analyzer_express(clang_analyzer_container_begin(V1)); // expected-warning{{$V1.begin()}}
// expected-note@-1{{$V1.begin()}}
clang_analyzer_express(clang_analyzer_container_begin(V2)); // expected-warning{{$V2.begin()}}
// expected-note@-1{{$V2.begin()}}
}
/// Print Container Data as Part of the Program State
void clang_analyzer_printState();
void print_state(std::vector<int> &V) {
V.cbegin();
clang_analyzer_printState();
// CHECK: "checker_messages": [
// CHECK-NEXT: { "checker": "alpha.cplusplus.ContainerModeling", "messages": [
// CHECK-NEXT: "Container Data :",
// CHECK-NEXT: "SymRegion{reg_$[[#]]<std::vector<int> & V>} : [ conj_$[[#]]{long, LC[[#]], S[[#]], #[[#]]} .. <Unknown> ]"
// CHECK-NEXT: ]}
V.cend();
clang_analyzer_printState();
// CHECK: "checker_messages": [
// CHECK-NEXT: { "checker": "alpha.cplusplus.ContainerModeling", "messages": [
// CHECK-NEXT: "Container Data :",
// CHECK-NEXT: "SymRegion{reg_$[[#]]<std::vector<int> & V>} : [ conj_$[[#]]{long, LC[[#]], S[[#]], #[[#]]} .. conj_$[[#]]{long, LC[[#]], S[[#]], #[[#]]} ]"
// CHECK-NEXT: ]}
}