forked from OSchip/llvm-project
977 lines
31 KiB
C++
977 lines
31 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=cplusplus.Move %s\
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// RUN: -std=c++11 -analyzer-output=text -analyzer-config eagerly-assume=false\
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// RUN: -analyzer-config exploration_strategy=unexplored_first_queue\
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// RUN: -analyzer-checker core,cplusplus.SmartPtr,debug.ExprInspection\
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// RUN: -verify=expected,peaceful,non-aggressive
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// RUN: %clang_analyze_cc1 -analyzer-checker=cplusplus.Move %s\
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// RUN: -std=c++11 -analyzer-output=text -analyzer-config eagerly-assume=false\
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// RUN: -analyzer-config exploration_strategy=dfs -DDFS\
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// RUN: -analyzer-checker core,cplusplus.SmartPtr,debug.ExprInspection\
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// RUN: -verify=expected,peaceful,non-aggressive
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// RUN: %clang_analyze_cc1 -analyzer-checker=cplusplus.Move %s\
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// RUN: -std=c++11 -analyzer-output=text -analyzer-config eagerly-assume=false\
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// RUN: -analyzer-config exploration_strategy=unexplored_first_queue\
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// RUN: -analyzer-config cplusplus.Move:WarnOn=KnownsOnly\
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// RUN: -analyzer-checker core,cplusplus.SmartPtr,debug.ExprInspection\
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// RUN: -verify=expected,non-aggressive
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// RUN: %clang_analyze_cc1 -analyzer-checker=cplusplus.Move -verify %s\
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// RUN: -std=c++11 -analyzer-output=text -analyzer-config eagerly-assume=false\
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// RUN: -analyzer-config exploration_strategy=dfs -DDFS\
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// RUN: -analyzer-config cplusplus.Move:WarnOn=KnownsOnly\
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// RUN: -analyzer-checker core,cplusplus.SmartPtr,debug.ExprInspection\
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// RUN: -verify=expected,non-aggressive
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// RUN: %clang_analyze_cc1 -analyzer-checker=cplusplus.Move %s\
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// RUN: -std=c++11 -analyzer-output=text -analyzer-config eagerly-assume=false\
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// RUN: -analyzer-config exploration_strategy=unexplored_first_queue\
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// RUN: -analyzer-config cplusplus.Move:WarnOn=All\
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// RUN: -analyzer-checker core,cplusplus.SmartPtr,debug.ExprInspection\
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// RUN: -verify=expected,peaceful,aggressive
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// RUN: %clang_analyze_cc1 -analyzer-checker=cplusplus.Move %s\
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// RUN: -std=c++11 -analyzer-output=text -analyzer-config eagerly-assume=false\
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// RUN: -analyzer-config exploration_strategy=dfs -DDFS\
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// RUN: -analyzer-config cplusplus.Move:WarnOn=All\
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// RUN: -analyzer-checker core,cplusplus.SmartPtr,debug.ExprInspection\
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// RUN: -verify=expected,peaceful,aggressive
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// RUN: not %clang_analyze_cc1 -verify %s \
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// RUN: -analyzer-checker=core \
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// RUN: -analyzer-checker=cplusplus.Move \
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// RUN: -analyzer-config cplusplus.Move:WarnOn="a bunch of things" \
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// RUN: 2>&1 | FileCheck %s -check-prefix=CHECK-MOVE-INVALID-VALUE
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// CHECK-MOVE-INVALID-VALUE: (frontend): invalid input for checker option
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// CHECK-MOVE-INVALID-VALUE-SAME: 'cplusplus.Move:WarnOn', that expects either
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// CHECK-MOVE-INVALID-VALUE-SAME: "KnownsOnly", "KnownsAndLocals" or "All"
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// CHECK-MOVE-INVALID-VALUE-SAME: string value
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// Tests checker-messages printing.
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// RUN: %clang_analyze_cc1 -analyzer-checker=cplusplus.Move %s\
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// RUN: -std=c++11 -analyzer-output=text -analyzer-config eagerly-assume=false\
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// RUN: -analyzer-config exploration_strategy=dfs -DDFS\
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// RUN: -analyzer-config cplusplus.Move:WarnOn=All -DAGGRESSIVE_DFS\
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// RUN: -analyzer-checker core,cplusplus.SmartPtr,debug.ExprInspection\
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// RUN: -verify=expected,peaceful,aggressive %s 2>&1 | FileCheck %s
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#include "Inputs/system-header-simulator-cxx.h"
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void clang_analyzer_warnIfReached();
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void clang_analyzer_printState();
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class B {
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public:
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B() = default;
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B(const B &) = default;
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B(B &&) = default;
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B& operator=(const B &q) = default;
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void operator=(B &&b) {
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return;
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}
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void foo() { return; }
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};
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class A {
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int i;
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double d;
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public:
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B b;
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A(int ii = 42, double dd = 1.0) : d(dd), i(ii), b(B()) {}
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void moveconstruct(A &&other) {
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std::swap(b, other.b);
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std::swap(d, other.d);
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std::swap(i, other.i);
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return;
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}
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static A get() {
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A v(12, 13);
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return v;
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}
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A(A *a) {
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moveconstruct(std::move(*a));
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}
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A(const A &other) : i(other.i), d(other.d), b(other.b) {}
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A(A &&other) : i(other.i), d(other.d), b(std::move(other.b)) { // aggressive-note{{Object 'b' is moved}}
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}
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A(A &&other, char *k) {
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moveconstruct(std::move(other));
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}
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void operator=(const A &other) {
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i = other.i;
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d = other.d;
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b = other.b;
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return;
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}
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void operator=(A &&other) {
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moveconstruct(std::move(other));
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return;
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}
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int getI() { return i; }
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int foo() const;
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void bar() const;
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void reset();
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void destroy();
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void clear();
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void resize(std::size_t);
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void assign(const A &);
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bool empty() const;
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bool isEmpty() const;
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operator bool() const;
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void testUpdateField() {
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A a;
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A b = std::move(a);
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a.i = 1;
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a.foo(); // no-warning
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}
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void testUpdateFieldDouble() {
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A a;
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A b = std::move(a);
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a.d = 1.0;
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a.foo(); // no-warning
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}
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};
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int bignum();
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void moveInsideFunctionCall(A a) {
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A b = std::move(a);
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}
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void leftRefCall(A &a) {
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a.foo();
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}
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void rightRefCall(A &&a) {
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a.foo();
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}
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void constCopyOrMoveCall(const A a) {
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a.foo();
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}
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void copyOrMoveCall(A a) {
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a.foo();
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}
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void simpleMoveCtorTest() {
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{
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A a;
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A b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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#ifdef AGGRESSIVE_DFS
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clang_analyzer_printState();
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// CHECK: "checker_messages": [
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// CHECK-NEXT: { "checker": "cplusplus.Move", "messages": [
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// CHECK-NEXT: "Moved-from objects :",
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// CHECK: "a: moved",
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// CHECK: ""
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// CHECK-NEXT: ]}
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// CHECK-NEXT: ]
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#endif
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a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
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// peaceful-note@-1 {{Method called on moved-from object 'a'}}
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}
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{
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A a;
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A b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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b = a; // peaceful-warning {{Moved-from object 'a' is copied}}
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// peaceful-note@-1 {{Moved-from object 'a' is copied}}
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}
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{
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A a;
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A b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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b = std::move(a); // peaceful-warning {{Moved-from object 'a' is moved}}
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// peaceful-note@-1 {{Moved-from object 'a' is moved}}
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}
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}
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void simpleMoveAssignementTest() {
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{
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A a;
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A b;
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b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
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// peaceful-note@-1 {{Method called on moved-from object 'a'}}
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}
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{
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A a;
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A b;
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b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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A c(a); // peaceful-warning {{Moved-from object 'a' is copied}}
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// peaceful-note@-1 {{Moved-from object 'a' is copied}}
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}
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{
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A a;
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A b;
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b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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A c(std::move(a)); // peaceful-warning {{Moved-from object 'a' is moved}}
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// peaceful-note@-1 {{Moved-from object 'a' is moved}}
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}
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}
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void moveInInitListTest() {
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struct S {
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A a;
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};
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A a;
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S s{std::move(a)}; // peaceful-note {{Object 'a' is moved}}
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a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
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// peaceful-note@-1 {{Method called on moved-from object 'a'}}
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}
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// Don't report a bug if the variable was assigned to in the meantime.
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void reinitializationTest(int i) {
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{
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A a;
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A b;
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b = std::move(a);
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a = A();
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a.foo();
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}
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{
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A a;
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if (i == 1) { // peaceful-note 2 {{Assuming 'i' is not equal to 1}}
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// peaceful-note@-1 2 {{Taking false branch}}
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A b;
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b = std::move(a);
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a = A();
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}
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if (i == 2) { // peaceful-note 2 {{Assuming 'i' is not equal to 2}}
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// peaceful-note@-1 2 {{Taking false branch}}
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a.foo(); // no-warning
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}
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}
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{
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A a;
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if (i == 1) { // peaceful-note 2 {{'i' is not equal to 1}}
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// peaceful-note@-1 2 {{Taking false branch}}
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std::move(a);
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}
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if (i == 2) { // peaceful-note 2 {{'i' is not equal to 2}}
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// peaceful-note@-1 2 {{Taking false branch}}
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a = A();
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a.foo();
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}
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}
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// The built-in assignment operator should also be recognized as a
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// reinitialization. (std::move() may be called on built-in types in template
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// code.)
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{
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int a1 = 1, a2 = 2;
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std::swap(a1, a2);
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}
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// A std::move() after the assignment makes the variable invalid again.
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{
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A a;
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A b;
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b = std::move(a);
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a = A();
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b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
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// peaceful-note@-1 {{Method called on moved-from object 'a'}}
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}
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// If a path exist where we not reinitialize the variable we report a bug.
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{
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A a;
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A b;
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b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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if (i < 10) { // peaceful-note {{Assuming 'i' is >= 10}}
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// peaceful-note@-1 {{Taking false branch}}
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a = A();
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}
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if (i > 5) { // peaceful-note {{'i' is > 5}}
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// peaceful-note@-1 {{Taking true branch}}
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a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
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// peaceful-note@-1 {{Method called on moved-from object 'a'}}
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}
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}
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}
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// Using decltype on an expression is not a use.
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void decltypeIsNotUseTest() {
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A a;
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// A b(std::move(a));
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decltype(a) other_a; // no-warning
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}
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void loopTest() {
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{
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A a;
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// FIXME: Execution doesn't jump to the end of the function yet.
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for (int i = 0; i < bignum(); i++) { // peaceful-note {{Loop condition is false. Execution jumps to the end of the function}}
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rightRefCall(std::move(a)); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < 2; i++) { // peaceful-note {{Loop condition is true. Entering loop body}}
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// peaceful-note@-1 {{Loop condition is true. Entering loop body}}
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// peaceful-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
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rightRefCall(std::move(a)); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < bignum(); i++) { // peaceful-note {{Loop condition is false. Execution jumps to the end of the function}}
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leftRefCall(a); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < 2; i++) { // peaceful-note {{Loop condition is true. Entering loop body}}
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// peaceful-note@-1 {{Loop condition is true. Entering loop body}}
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// peaceful-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
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leftRefCall(a); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < bignum(); i++) { // peaceful-note {{Loop condition is false. Execution jumps to the end of the function}}
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constCopyOrMoveCall(a); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < 2; i++) { // peaceful-note {{Loop condition is true. Entering loop body}}
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// peaceful-note@-1 {{Loop condition is true. Entering loop body}}
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// peaceful-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
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constCopyOrMoveCall(a); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < bignum(); i++) { // peaceful-note {{Loop condition is false. Execution jumps to the end of the function}}
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moveInsideFunctionCall(a); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < 2; i++) { // peaceful-note {{Loop condition is true. Entering loop body}}
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// peaceful-note@-1 {{Loop condition is true. Entering loop body}}
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// peaceful-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
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moveInsideFunctionCall(a); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < bignum(); i++) { // peaceful-note {{Loop condition is false. Execution jumps to the end of the function}}
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copyOrMoveCall(a); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < 2; i++) { // peaceful-note {{Loop condition is true. Entering loop body}}
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// peaceful-note@-1 {{Loop condition is true. Entering loop body}}
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// peaceful-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
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copyOrMoveCall(a); // no-warning
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}
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}
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{
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A a;
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for (int i = 0; i < bignum(); i++) { // peaceful-note {{Loop condition is true. Entering loop body}}
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// peaceful-note@-1 {{Loop condition is true. Entering loop body}}
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constCopyOrMoveCall(std::move(a)); // peaceful-note {{Object 'a' is moved}}
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// peaceful-warning@-1 {{Moved-from object 'a' is moved}}
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// peaceful-note@-2 {{Moved-from object 'a' is moved}}
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}
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}
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// Don't warn if we return after the move.
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{
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A a;
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for (int i = 0; i < 3; ++i) {
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a.bar();
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if (a.foo() > 0) {
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A b;
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b = std::move(a); // no-warning
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return;
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}
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}
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}
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}
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// Report a usage of a moved-from object only at the first use.
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void uniqueTest(bool cond) {
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A a(42, 42.0);
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A b;
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b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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if (cond) { // peaceful-note {{Assuming 'cond' is true}}
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// peaceful-note@-1 {{Taking true branch}}
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a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
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// peaceful-note@-1 {{Method called on moved-from object 'a'}}
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}
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if (cond) {
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a.bar(); // no-warning
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}
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a.bar(); // no-warning
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}
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void uniqueTest2() {
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A a;
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A a1 = std::move(a); // peaceful-note {{Object 'a' is moved}}
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a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
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// peaceful-note@-1 {{Method called on moved-from object 'a'}}
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A a2 = std::move(a); // no-warning
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a.foo(); // no-warning
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}
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// There are exceptions where we assume in general that the method works fine
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//even on moved-from objects.
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void moveSafeFunctionsTest() {
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A a;
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A b = std::move(a); // peaceful-note {{Object 'a' is moved}}
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a.empty(); // no-warning
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a.isEmpty(); // no-warning
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(void)a; // no-warning
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(bool)a; // expected-warning {{expression result unused}}
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a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
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// peaceful-note@-1 {{Method called on moved-from object 'a'}}
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}
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void moveStateResetFunctionsTest() {
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{
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A a;
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A b = std::move(a);
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a.reset(); // no-warning
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a.foo(); // no-warning
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// Test if resets the state of subregions as well.
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a.b.foo(); // no-warning
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}
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{
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A a;
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A b = std::move(a);
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a.destroy(); // no-warning
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a.foo(); // no-warning
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}
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{
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A a;
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A b = std::move(a);
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a.clear(); // no-warning
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a.foo(); // no-warning
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a.b.foo(); // no-warning
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}
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{
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A a;
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A b = std::move(a);
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a.resize(0); // no-warning
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a.foo(); // no-warning
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a.b.foo(); // no-warning
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}
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{
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A a;
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A b = std::move(a);
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a.assign(A()); // no-warning
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a.foo(); // no-warning
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a.b.foo(); // no-warning
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}
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}
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// Moves or uses that occur as part of template arguments.
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template <int>
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class ClassTemplate {
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public:
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void foo(A a);
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};
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|
|
template <int>
|
|
void functionTemplate(A a);
|
|
|
|
void templateArgIsNotUseTest() {
|
|
{
|
|
// A pattern like this occurs in the EXPECT_EQ and ASSERT_EQ macros in
|
|
// Google Test.
|
|
A a;
|
|
ClassTemplate<sizeof(A(std::move(a)))>().foo(std::move(a)); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
functionTemplate<sizeof(A(std::move(a)))>(std::move(a)); // no-warning
|
|
}
|
|
}
|
|
|
|
// Moves of global variables are not reported.
|
|
A global_a;
|
|
void globalVariablesTest() {
|
|
std::move(global_a);
|
|
global_a.foo(); // no-warning
|
|
}
|
|
|
|
// Moves of member variables.
|
|
class memberVariablesTest {
|
|
A a;
|
|
static A static_a;
|
|
|
|
void f() {
|
|
A b;
|
|
b = std::move(a); // aggressive-note {{Object 'a' is moved}}
|
|
|
|
a.foo(); // aggressive-warning {{Method called on moved-from object 'a'}}
|
|
// aggressive-note@-1 {{Method called on moved-from object 'a'}}
|
|
|
|
b = std::move(static_a); // aggressive-note {{Object 'static_a' is moved}}
|
|
static_a.foo(); // aggressive-warning {{Method called on moved-from object 'static_a'}}
|
|
// aggressive-note@-1 {{Method called on moved-from object 'static_a'}}
|
|
}
|
|
};
|
|
|
|
void PtrAndArrayTest() {
|
|
A *Ptr = new A(1, 1.5);
|
|
A Arr[10];
|
|
Arr[2] = std::move(*Ptr); // aggressive-note{{Object is moved}}
|
|
(*Ptr).foo(); // aggressive-warning{{Method called on moved-from object}}
|
|
// aggressive-note@-1{{Method called on moved-from object}}
|
|
|
|
Ptr = &Arr[1];
|
|
Arr[3] = std::move(Arr[1]); // aggressive-note {{Object is moved}}
|
|
Ptr->foo(); // aggressive-warning {{Method called on moved-from object}}
|
|
// aggressive-note@-1 {{Method called on moved-from object}}
|
|
|
|
Arr[3] = std::move(Arr[2]); // aggressive-note{{Object is moved}}
|
|
Arr[2].foo(); // aggressive-warning{{Method called on moved-from object}}
|
|
// aggressive-note@-1{{Method called on moved-from object}}
|
|
|
|
Arr[2] = std::move(Arr[3]); // reinitialization
|
|
Arr[2].foo(); // no-warning
|
|
}
|
|
|
|
void exclusiveConditionsTest(bool cond) {
|
|
A a;
|
|
if (cond) {
|
|
A b;
|
|
b = std::move(a);
|
|
}
|
|
if (!cond) {
|
|
a.bar(); // no-warning
|
|
}
|
|
}
|
|
|
|
void differentBranchesTest(int i) {
|
|
// Don't warn if the use is in a different branch from the move.
|
|
{
|
|
A a;
|
|
if (i > 0) { // peaceful-note {{Assuming 'i' is > 0}}
|
|
// peaceful-note@-1 {{Taking true branch}}
|
|
A b;
|
|
b = std::move(a);
|
|
} else {
|
|
a.foo(); // no-warning
|
|
}
|
|
}
|
|
// Same thing, but with a ternary operator.
|
|
{
|
|
A a, b;
|
|
i > 0 ? (void)(b = std::move(a)) : a.bar(); // no-warning
|
|
// peaceful-note@-1 {{'i' is > 0}}
|
|
// peaceful-note@-2 {{'?' condition is true}}
|
|
}
|
|
// A variation on the theme above.
|
|
{
|
|
A a;
|
|
a.foo() > 0 ? a.foo() : A(std::move(a)).foo();
|
|
#ifdef DFS
|
|
// peaceful-note@-2 {{Assuming the condition is false}}
|
|
// peaceful-note@-3 {{'?' condition is false}}
|
|
#else
|
|
// peaceful-note@-5 {{Assuming the condition is true}}
|
|
// peaceful-note@-6 {{'?' condition is true}}
|
|
#endif
|
|
}
|
|
// Same thing, but with a switch statement.
|
|
{
|
|
A a, b;
|
|
switch (i) { // peaceful-note {{Control jumps to 'case 1:'}}
|
|
case 1:
|
|
b = std::move(a); // no-warning
|
|
// FIXME: Execution doesn't jump to the end of the function yet.
|
|
break; // peaceful-note {{Execution jumps to the end of the function}}
|
|
case 2:
|
|
a.foo(); // no-warning
|
|
break;
|
|
}
|
|
}
|
|
// However, if there's a fallthrough, we do warn.
|
|
{
|
|
A a, b;
|
|
switch (i) { // peaceful-note {{Control jumps to 'case 1:'}}
|
|
case 1:
|
|
b = std::move(a); // peaceful-note {{Object 'a' is moved}}
|
|
case 2:
|
|
a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'a'}}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void tempTest() {
|
|
A a = A::get();
|
|
A::get().foo(); // no-warning
|
|
for (int i = 0; i < bignum(); i++) {
|
|
A::get().foo(); // no-warning
|
|
}
|
|
}
|
|
|
|
void interFunTest1(A &a) {
|
|
a.bar(); // peaceful-warning {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'a'}}
|
|
}
|
|
|
|
void interFunTest2() {
|
|
A a;
|
|
A b;
|
|
b = std::move(a); // peaceful-note {{Object 'a' is moved}}
|
|
interFunTest1(a); // peaceful-note {{Calling 'interFunTest1'}}
|
|
}
|
|
|
|
void foobar(A a, int i);
|
|
void foobar(int i, A a);
|
|
|
|
void paramEvaluateOrderTest() {
|
|
A a;
|
|
foobar(std::move(a), a.getI()); // peaceful-note {{Object 'a' is moved}}
|
|
// peaceful-warning@-1 {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-2 {{Method called on moved-from object 'a'}}
|
|
|
|
//FALSE NEGATIVE since parameters evaluate order is undefined
|
|
foobar(a.getI(), std::move(a)); //no-warning
|
|
}
|
|
|
|
void not_known_pass_by_ref(A &a);
|
|
void not_known_pass_by_const_ref(const A &a);
|
|
void not_known_pass_by_rvalue_ref(A &&a);
|
|
void not_known_pass_by_ptr(A *a);
|
|
void not_known_pass_by_const_ptr(const A *a);
|
|
|
|
void regionAndPointerEscapeTest() {
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a);
|
|
not_known_pass_by_ref(a);
|
|
a.foo(); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a); // peaceful-note{{Object 'a' is moved}}
|
|
not_known_pass_by_const_ref(a);
|
|
a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'a'}}
|
|
}
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a);
|
|
not_known_pass_by_rvalue_ref(std::move(a));
|
|
a.foo(); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a);
|
|
not_known_pass_by_ptr(&a);
|
|
a.foo(); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a); // peaceful-note {{Object 'a' is moved}}
|
|
not_known_pass_by_const_ptr(&a);
|
|
a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'a'}}
|
|
}
|
|
}
|
|
|
|
// A declaration statement containing multiple declarations sequences the
|
|
// initializer expressions.
|
|
void declarationSequenceTest() {
|
|
{
|
|
A a;
|
|
A a1 = a, a2 = std::move(a); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
A a1 = std::move(a), a2 = a; // peaceful-note {{Object 'a' is moved}}
|
|
// peaceful-warning@-1 {{Moved-from object 'a' is copied}}
|
|
// peaceful-note@-2 {{Moved-from object 'a' is copied}}
|
|
}
|
|
}
|
|
|
|
// The logical operators && and || sequence their operands.
|
|
void logicalOperatorsSequenceTest() {
|
|
{
|
|
A a;
|
|
if (a.foo() > 0 && A(std::move(a)).foo() > 0) { // peaceful-note {{Assuming the condition is false}}
|
|
// peaceful-note@-1 {{Left side of '&&' is false}}
|
|
// peaceful-note@-2 {{Taking false branch}}
|
|
// And the other report:
|
|
// peaceful-note@-4 {{Assuming the condition is false}}
|
|
// peaceful-note@-5 {{Left side of '&&' is false}}
|
|
// peaceful-note@-6 {{Taking false branch}}
|
|
A().bar();
|
|
}
|
|
}
|
|
// A variation: Negate the result of the && (which pushes the && further down
|
|
// into the AST).
|
|
{
|
|
A a;
|
|
if (!(a.foo() > 0 && A(std::move(a)).foo() > 0)) { // peaceful-note {{Assuming the condition is false}}
|
|
// peaceful-note@-1 {{Left side of '&&' is false}}
|
|
// peaceful-note@-2 {{Taking true branch}}
|
|
// And the other report:
|
|
// peaceful-note@-4 {{Assuming the condition is false}}
|
|
// peaceful-note@-5 {{Left side of '&&' is false}}
|
|
// peaceful-note@-6 {{Taking true branch}}
|
|
A().bar();
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
if (A(std::move(a)).foo() > 0 && a.foo() > 0) { // peaceful-note {{Object 'a' is moved}}
|
|
// peaceful-note@-1 {{Assuming the condition is true}}
|
|
// peaceful-note@-2 {{Left side of '&&' is true}}
|
|
// peaceful-warning@-3 {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-4 {{Method called on moved-from object 'a'}}
|
|
// And the other report:
|
|
// peaceful-note@-6 {{Assuming the condition is false}}
|
|
// peaceful-note@-7 {{Left side of '&&' is false}}
|
|
// peaceful-note@-8 {{Taking false branch}}
|
|
A().bar();
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
if (a.foo() > 0 || A(std::move(a)).foo() > 0) { // peaceful-note {{Assuming the condition is true}}
|
|
// peaceful-note@-1 {{Left side of '||' is true}}
|
|
// peaceful-note@-2 {{Taking true branch}}
|
|
A().bar();
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
if (A(std::move(a)).foo() > 0 || a.foo() > 0) { // peaceful-note {{Object 'a' is moved}}
|
|
// peaceful-note@-1 {{Assuming the condition is false}}
|
|
// peaceful-note@-2 {{Left side of '||' is false}}
|
|
// peaceful-warning@-3 {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-4 {{Method called on moved-from object 'a'}}
|
|
A().bar();
|
|
}
|
|
}
|
|
}
|
|
|
|
// A range-based for sequences the loop variable declaration before the body.
|
|
void forRangeSequencesTest() {
|
|
A v[2] = {A(), A()};
|
|
for (A &a : v) {
|
|
A b;
|
|
b = std::move(a); // no-warning
|
|
}
|
|
}
|
|
|
|
// If a variable is declared in an if statement, the declaration of the variable
|
|
// (which is treated like a reinitialization by the check) is sequenced before
|
|
// the evaluation of the condition (which constitutes a use).
|
|
void ifStmtSequencesDeclAndConditionTest() {
|
|
for (int i = 0; i < 3; ++i) {
|
|
if (A a = A()) {
|
|
A b;
|
|
b = std::move(a); // no-warning
|
|
}
|
|
}
|
|
}
|
|
|
|
struct C : public A {
|
|
[[clang::reinitializes]] void reinit();
|
|
};
|
|
|
|
void subRegionMoveTest() {
|
|
{
|
|
A a;
|
|
B b = std::move(a.b); // aggressive-note {{Object 'b' is moved}}
|
|
a.b.foo(); // aggressive-warning {{Method called on moved-from object 'b'}}
|
|
// aggressive-note@-1 {{Method called on moved-from object 'b'}}
|
|
}
|
|
{
|
|
A a;
|
|
A a1 = std::move(a); // aggressive-note {{Calling move constructor for 'A'}}
|
|
// aggressive-note@-1 {{Returning from move constructor for 'A'}}
|
|
a.b.foo(); // aggressive-warning{{Method called on moved-from object 'b'}}
|
|
// aggressive-note@-1{{Method called on moved-from object 'b'}}
|
|
}
|
|
// Don't report a misuse if any SuperRegion is already reported.
|
|
{
|
|
A a;
|
|
A a1 = std::move(a); // peaceful-note {{Object 'a' is moved}}
|
|
a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'a'}}
|
|
a.b.foo(); // no-warning
|
|
}
|
|
{
|
|
C c;
|
|
C c1 = std::move(c); // peaceful-note {{Object 'c' is moved}}
|
|
c.foo(); // peaceful-warning {{Method called on moved-from object 'c'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'c'}}
|
|
c.b.foo(); // no-warning
|
|
}
|
|
}
|
|
|
|
void resetSuperClass() {
|
|
C c;
|
|
C c1 = std::move(c);
|
|
c.clear();
|
|
C c2 = c; // no-warning
|
|
}
|
|
|
|
void resetSuperClass2() {
|
|
C c;
|
|
C c1 = std::move(c);
|
|
c.reinit();
|
|
C c2 = c; // no-warning
|
|
}
|
|
|
|
void reportSuperClass() {
|
|
C c;
|
|
C c1 = std::move(c); // peaceful-note {{Object 'c' is moved}}
|
|
c.foo(); // peaceful-warning {{Method called on moved-from object 'c'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'c'}}
|
|
C c2 = c; // no-warning
|
|
}
|
|
|
|
struct Empty {};
|
|
|
|
Empty inlinedCall() {
|
|
// Used to warn because region 'e' failed to be cleaned up because no symbols
|
|
// have ever died during the analysis and the checkDeadSymbols callback
|
|
// was skipped entirely.
|
|
Empty e{};
|
|
return e; // no-warning
|
|
}
|
|
|
|
void checkInlinedCallZombies() {
|
|
while (true)
|
|
inlinedCall();
|
|
}
|
|
|
|
void checkLoopZombies() {
|
|
while (true) {
|
|
Empty e{};
|
|
Empty f = std::move(e); // no-warning
|
|
}
|
|
}
|
|
|
|
void checkMoreLoopZombies1(bool flag) {
|
|
while (flag) {
|
|
Empty e{};
|
|
if (true)
|
|
e; // expected-warning {{expression result unused}}
|
|
Empty f = std::move(e); // no-warning
|
|
}
|
|
}
|
|
|
|
bool coin();
|
|
|
|
void checkMoreLoopZombies2(bool flag) {
|
|
while (flag) {
|
|
Empty e{};
|
|
while (coin())
|
|
e; // expected-warning {{expression result unused}}
|
|
Empty f = std::move(e); // no-warning
|
|
}
|
|
}
|
|
|
|
void checkMoreLoopZombies3(bool flag) {
|
|
while (flag) {
|
|
Empty e{};
|
|
do
|
|
e; // expected-warning {{expression result unused}}
|
|
while (coin());
|
|
Empty f = std::move(e); // no-warning
|
|
}
|
|
}
|
|
|
|
void checkMoreLoopZombies4(bool flag) {
|
|
while (flag) {
|
|
Empty e{};
|
|
for (; coin();)
|
|
e; // expected-warning {{expression result unused}}
|
|
Empty f = std::move(e); // no-warning
|
|
}
|
|
}
|
|
|
|
struct MoveOnlyWithDestructor {
|
|
MoveOnlyWithDestructor();
|
|
~MoveOnlyWithDestructor();
|
|
MoveOnlyWithDestructor(const MoveOnlyWithDestructor &m) = delete;
|
|
MoveOnlyWithDestructor(MoveOnlyWithDestructor &&m);
|
|
};
|
|
|
|
MoveOnlyWithDestructor foo() {
|
|
MoveOnlyWithDestructor m;
|
|
return m;
|
|
}
|
|
|
|
class HasSTLField {
|
|
std::vector<int> V;
|
|
void testVector() {
|
|
// Warn even in non-aggressive mode when it comes to STL, because
|
|
// in STL the object is left in "valid but unspecified state" after move.
|
|
std::vector<int> W = std::move(V); // expected-note {{Object 'V' of type 'std::vector' is left in a valid but unspecified state after move}}
|
|
V.push_back(123); // expected-warning {{Method called on moved-from object 'V'}}
|
|
// expected-note@-1 {{Method called on moved-from object 'V'}}
|
|
}
|
|
|
|
std::unique_ptr<int> P;
|
|
void testUniquePtr() {
|
|
// unique_ptr remains in a well-defined state after move.
|
|
std::unique_ptr<int> Q = std::move(P); // aggressive-note {{Object 'P' is moved}}
|
|
// non-aggressive-note@-1 {{Smart pointer 'P' of type 'std::unique_ptr' is reset to null when moved from}}
|
|
P.get(); // aggressive-warning{{Method called on moved-from object 'P'}}
|
|
// aggressive-note@-1{{Method called on moved-from object 'P'}}
|
|
|
|
// Because that well-defined state is null, dereference is still UB.
|
|
// Note that in aggressive mode we already warned about 'P',
|
|
// so no extra warning is generated.
|
|
*P += 1; // non-aggressive-warning{{Dereference of null smart pointer 'P' of type 'std::unique_ptr'}}
|
|
// non-aggressive-note@-1{{Dereference of null smart pointer 'P' of type 'std::unique_ptr'}}
|
|
|
|
// The program should have crashed by now.
|
|
clang_analyzer_warnIfReached(); // no-warning
|
|
}
|
|
};
|
|
|
|
void localRValueMove(A &&a) {
|
|
A b = std::move(a); // peaceful-note {{Object 'a' is moved}}
|
|
a.foo(); // peaceful-warning {{Method called on moved-from object 'a'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'a'}}
|
|
}
|
|
|
|
void localUniquePtr(std::unique_ptr<int> P) {
|
|
// Even though unique_ptr is safe to use after move,
|
|
// reusing a local variable this way usually indicates a bug.
|
|
std::unique_ptr<int> Q = std::move(P); // peaceful-note {{Object 'P' is moved}}
|
|
P.get(); // peaceful-warning {{Method called on moved-from object 'P'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'P'}}
|
|
}
|
|
|
|
void localUniquePtrWithArrow(std::unique_ptr<A> P) {
|
|
std::unique_ptr<A> Q = std::move(P); // expected-note{{Smart pointer 'P' of type 'std::unique_ptr' is reset to null when moved from}}
|
|
P->foo(); // expected-warning{{Dereference of null smart pointer 'P' of type 'std::unique_ptr'}}
|
|
// expected-note@-1{{Dereference of null smart pointer 'P' of type 'std::unique_ptr'}}
|
|
}
|
|
|
|
void getAfterMove(std::unique_ptr<A> P) {
|
|
std::unique_ptr<A> Q = std::move(P); // peaceful-note {{Object 'P' is moved}}
|
|
|
|
// TODO: Explain why (bool)P is false.
|
|
if (P) // peaceful-note{{Taking false branch}}
|
|
clang_analyzer_warnIfReached(); // no-warning
|
|
|
|
A *a = P.get(); // peaceful-warning {{Method called on moved-from object 'P'}}
|
|
// peaceful-note@-1 {{Method called on moved-from object 'P'}}
|
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// TODO: Warn on a null dereference here.
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a->foo();
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}
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