forked from OSchip/llvm-project
131 lines
3.8 KiB
C++
131 lines
3.8 KiB
C++
// RUN: %clang_analyze_cc1 -triple x86_64-unknown-linux -analyzer-checker=debug.DumpCFG -std=c++14 -analyzer-config eagerly-assume=false %s > %t 2>&1
|
|
// RUN: FileCheck --input-file=%t %s
|
|
// RUN: %clang_analyze_cc1 -triple x86_64-unknown-linux -analyzer-checker=core,debug.ExprInspection -std=c++14 -verify -analyzer-config eagerly-assume=false %s
|
|
|
|
void clang_analyzer_eval(bool);
|
|
|
|
int global;
|
|
|
|
namespace variant_0 {
|
|
// This variant of the code works correctly. Function foo() is not a template
|
|
// function. Note that there are two destructors within foo().
|
|
|
|
class A {
|
|
public:
|
|
~A() { ++global; }
|
|
};
|
|
|
|
class B {
|
|
A a;
|
|
};
|
|
|
|
// CHECK: void foo(int)
|
|
// CHECK: [B1]
|
|
// CHECK-NEXT: 1: (CXXConstructExpr, [B1.2], class variant_0::B)
|
|
// CHECK-NEXT: 2: variant_0::B i;
|
|
// CHECK-NEXT: 3: operator=
|
|
// CHECK-NEXT: 4: [B1.3] (ImplicitCastExpr, FunctionToPointerDecay, class variant_0::B &(*)(class variant_0::B &&) noexcept)
|
|
// CHECK-NEXT: 5: i
|
|
// CHECK-NEXT: 6: {} (CXXConstructExpr, [B1.7], [B1.8], class variant_0::B)
|
|
// CHECK-NEXT: 7: [B1.6] (BindTemporary)
|
|
// CHECK-NEXT: 8: [B1.7]
|
|
// CHECK-NEXT: 9: [B1.5] = [B1.8] (OperatorCall)
|
|
// CHECK-NEXT: 10: ~variant_0::B() (Temporary object destructor)
|
|
// CHECK-NEXT: 11: [B1.2].~variant_0::B() (Implicit destructor)
|
|
void foo(int) {
|
|
B i;
|
|
i = {};
|
|
}
|
|
|
|
void bar() {
|
|
global = 0;
|
|
foo(1);
|
|
clang_analyzer_eval(global == 2); // expected-warning{{TRUE}}
|
|
}
|
|
|
|
} // end namespace variant_0
|
|
|
|
namespace variant_1 {
|
|
// Suddenly, if we turn foo() into a template, we are missing a
|
|
// CXXBindTemporaryExpr in the AST, and therefore we're missing a
|
|
// temporary destructor in the CFG.
|
|
|
|
class A {
|
|
public:
|
|
~A() { ++global; }
|
|
};
|
|
|
|
class B {
|
|
A a;
|
|
};
|
|
|
|
// FIXME: Find the construction context for {} and enforce the temporary
|
|
// destructor.
|
|
// CHECK: template<> void foo<int>(int)
|
|
// CHECK: [B1]
|
|
// CHECK-NEXT: 1: (CXXConstructExpr, [B1.2], class variant_1::B)
|
|
// CHECK-NEXT: 2: variant_1::B i;
|
|
// CHECK-NEXT: 3: operator=
|
|
// CHECK-NEXT: 4: [B1.3] (ImplicitCastExpr, FunctionToPointerDecay, class variant_1::B &(*)(class variant_1::B &&) noexcept)
|
|
// CHECK-NEXT: 5: i
|
|
// CHECK-NEXT: 6: {} (CXXConstructExpr, class variant_1::B)
|
|
// CHECK-NEXT: 7: [B1.6]
|
|
// CHECK-NEXT: 8: [B1.5] = [B1.7] (OperatorCall)
|
|
// CHECK-NEXT: 9: [B1.2].~variant_1::B() (Implicit destructor)
|
|
template <typename T> void foo(T) {
|
|
B i;
|
|
i = {};
|
|
}
|
|
|
|
void bar() {
|
|
global = 0;
|
|
foo(1);
|
|
// FIXME: Should be TRUE, i.e. we should call (and inline) two destructors.
|
|
clang_analyzer_eval(global == 2); // expected-warning{{UNKNOWN}}
|
|
}
|
|
|
|
} // end namespace variant_1
|
|
|
|
namespace variant_2 {
|
|
// Making field 'a' in class 'B' public turns the class into an aggregate.
|
|
// In this case there is no constructor at {} - only an aggregate
|
|
// initialization. Aggregate initialization is unsupported for now.
|
|
|
|
class A {
|
|
public:
|
|
~A() { ++global; }
|
|
};
|
|
|
|
class B {
|
|
public:
|
|
A a;
|
|
};
|
|
|
|
// CHECK: template<> void foo<int>(int)
|
|
// CHECK: [B1]
|
|
// CHECK-NEXT: 1: (CXXConstructExpr, [B1.2], class variant_2::B)
|
|
// CHECK-NEXT: 2: variant_2::B i;
|
|
// CHECK-NEXT: 3: operator=
|
|
// CHECK-NEXT: 4: [B1.3] (ImplicitCastExpr, FunctionToPointerDecay, class variant_2::B &(*)(class variant_2::B &&) noexcept)
|
|
// CHECK-NEXT: 5: i
|
|
// CHECK-NEXT: 6: {}
|
|
// CHECK-NEXT: 7: {}
|
|
// CHECK-NEXT: 8: [B1.7] (BindTemporary)
|
|
// CHECK-NEXT: 9: [B1.8]
|
|
// CHECK-NEXT: 10: [B1.5] = [B1.9] (OperatorCall)
|
|
// CHECK-NEXT: 11: ~variant_2::B() (Temporary object destructor)
|
|
// CHECK-NEXT: 12: [B1.2].~variant_2::B() (Implicit destructor)
|
|
template <typename T> void foo(T) {
|
|
B i;
|
|
i = {};
|
|
}
|
|
|
|
void bar() {
|
|
global = 0;
|
|
foo(1);
|
|
// FIXME: Should be TRUE, i.e. we should call (and inline) two destructors.
|
|
clang_analyzer_eval(global == 2); // expected-warning{{UNKNOWN}}
|
|
}
|
|
|
|
} // end namespace variant_2
|