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Some AST nodes which stands for implicit initialization is shared. The analyzer will do the same evaluation on the same nodes resulting in the same state. The analyzer will "cache out", i.e. it thinks that it visited an already existing node in the exploded graph. This is not true in this case and we lose coverage. Since these nodes do not really require any processing from the analyzer we just omit them from the CFG. Differential Revision: https://reviews.llvm.org/D71371
295 lines
10 KiB
C++
295 lines
10 KiB
C++
// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=debug.DumpCFG -analyzer-config cfg-rich-constructors=false %s 2>&1 | FileCheck -check-prefixes=CHECK,WARNINGS %s
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// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=debug.DumpCFG -analyzer-config cfg-rich-constructors=true %s 2>&1 | FileCheck -check-prefixes=CHECK,ANALYZER %s
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// This file tests how we construct two different flavors of the Clang CFG -
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// the CFG used by the Sema analysis-based warnings and the CFG used by the
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// static analyzer. The difference in the behavior is checked via FileCheck
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// prefixes (WARNINGS and ANALYZER respectively). When introducing new analyzer
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// flags, no new run lines should be added - just these flags would go to the
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// respective line depending on where is it turned on and where is it turned
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// off. Feel free to add tests that test only one of the CFG flavors if you're
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// not sure how the other flavor is supposed to work in your case.
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class A {
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public:
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// CHECK: A()
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// CHECK: [B1 (ENTRY)]
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (1): B1
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A() {}
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// CHECK: A(int i)
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// CHECK: [B1 (ENTRY)]
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (1): B1
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A(int i) {}
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};
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class B : public virtual A {
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public:
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// CHECK: B()
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// CHECK: [B3 (ENTRY)]
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// CHECK-NEXT: Succs (1): B2
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// CHECK: [B1]
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// WARNINGS-NEXT: 1: (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 1: (CXXConstructExpr, A() (Base initializer), class A)
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// CHECK-NEXT: 2: A([B1.1]) (Base initializer)
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// CHECK-NEXT: Preds (1): B2
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B2]
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// CHECK-NEXT: T: (See if most derived ctor has already initialized vbases)
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// CHECK-NEXT: Preds (1): B3
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// CHECK-NEXT: Succs (2): B0 B1
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (2): B1 B2
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B() {}
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// CHECK: B(int i)
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// CHECK: [B3 (ENTRY)]
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// CHECK-NEXT: Succs (1): B2
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// CHECK: [B1]
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// CHECK-NEXT: 1: i
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// CHECK-NEXT: 2: [B1.1] (ImplicitCastExpr, LValueToRValue, int)
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// WARNINGS-NEXT: 3: [B1.2] (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 3: [B1.2] (CXXConstructExpr, A([B1.2]) (Base initializer), class A)
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// CHECK-NEXT: 4: A([B1.3]) (Base initializer)
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// CHECK-NEXT: Preds (1): B2
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B2]
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// CHECK-NEXT: T: (See if most derived ctor has already initialized vbases)
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// CHECK-NEXT: Preds (1): B3
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// CHECK-NEXT: Succs (2): B0 B1
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (2): B1 B2
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B(int i) : A(i) {}
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};
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class C : public virtual A {
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public:
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// CHECK: C()
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// CHECK: [B3 (ENTRY)]
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// CHECK-NEXT: Succs (1): B2
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// CHECK: [B1]
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// WARNINGS-NEXT: 1: (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 1: (CXXConstructExpr, A() (Base initializer), class A)
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// CHECK-NEXT: 2: A([B1.1]) (Base initializer)
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// CHECK-NEXT: Preds (1): B2
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B2]
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// CHECK-NEXT: T: (See if most derived ctor has already initialized vbases)
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// CHECK-NEXT: Preds (1): B3
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// CHECK-NEXT: Succs (2): B0 B1
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (2): B1 B2
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C() {}
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// CHECK: C(int i)
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// CHECK: [B3 (ENTRY)]
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// CHECK-NEXT: Succs (1): B2
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// CHECK: [B1]
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// CHECK-NEXT: 1: i
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// CHECK-NEXT: 2: [B1.1] (ImplicitCastExpr, LValueToRValue, int)
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// WARNINGS-NEXT: 3: [B1.2] (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 3: [B1.2] (CXXConstructExpr, A([B1.2]) (Base initializer), class A)
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// CHECK-NEXT: 4: A([B1.3]) (Base initializer)
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// CHECK-NEXT: Preds (1): B2
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B2]
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// CHECK-NEXT: T: (See if most derived ctor has already initialized vbases)
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// CHECK-NEXT: Preds (1): B3
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// CHECK-NEXT: Succs (2): B0 B1
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (2): B1 B2
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C(int i) : A(i) {}
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};
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class TestOrder : public C, public B, public A {
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int i;
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int& r;
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public:
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TestOrder();
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};
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// CHECK: TestOrder::TestOrder()
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// CHECK: [B4 (ENTRY)]
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// CHECK-NEXT: Succs (1): B3
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// CHECK: [B1]
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// WARNINGS-NEXT: 1: (CXXConstructExpr, class C)
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// ANALYZER-NEXT: 1: (CXXConstructExpr, C() (Base initializer), class C)
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// CHECK-NEXT: 2: C([B1.1]) (Base initializer)
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// WARNINGS-NEXT: 3: (CXXConstructExpr, class B)
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// ANALYZER-NEXT: 3: (CXXConstructExpr, B() (Base initializer), class B)
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// CHECK-NEXT: 4: B([B1.3]) (Base initializer)
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// WARNINGS-NEXT: 5: (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 5: (CXXConstructExpr, A() (Base initializer), class A)
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// CHECK-NEXT: 6: A([B1.5]) (Base initializer)
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// CHECK-NEXT: 7: i(/*implicit*/(int)0) (Member initializer)
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// CHECK-NEXT: 8: this
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// CHECK-NEXT: 9: [B1.8]->i
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// CHECK-NEXT: 10: r([B1.9]) (Member initializer)
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// WARNINGS-NEXT: 11: (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 11: (CXXConstructExpr, [B1.12], class A)
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// CHECK-NEXT: 12: A a;
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// CHECK-NEXT: Preds (2): B2 B3
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B2]
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// WARNINGS-NEXT: 1: (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 1: (CXXConstructExpr, A() (Base initializer), class A)
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// CHECK-NEXT: 2: A([B2.1]) (Base initializer)
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// CHECK-NEXT: Preds (1): B3
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// CHECK-NEXT: Succs (1): B1
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// CHECK: [B3]
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// CHECK-NEXT: T: (See if most derived ctor has already initialized vbases)
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// CHECK-NEXT: Preds (1): B4
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// CHECK-NEXT: Succs (2): B1 B2
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (1): B1
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TestOrder::TestOrder()
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: r(i), B(), i(), C() {
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A a;
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}
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class TestControlFlow {
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int x, y, z;
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public:
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TestControlFlow(bool b);
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};
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// CHECK: TestControlFlow::TestControlFlow(bool b)
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// CHECK: [B5 (ENTRY)]
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// CHECK-NEXT: Succs (1): B4
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// CHECK: [B1]
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// CHECK-NEXT: 1: [B4.4] ? [B2.1] : [B3.1]
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// CHECK-NEXT: 2: y([B1.1]) (Member initializer)
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// CHECK-NEXT: 3: this
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// CHECK-NEXT: 4: [B1.3]->y
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// CHECK-NEXT: 5: [B1.4] (ImplicitCastExpr, LValueToRValue, int)
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// CHECK-NEXT: 6: z([B1.5]) (Member initializer)
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// CHECK-NEXT: 7: int v;
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// CHECK-NEXT: Preds (2): B2 B3
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B2]
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// CHECK-NEXT: 1: 0
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// CHECK-NEXT: Preds (1): B4
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// CHECK-NEXT: Succs (1): B1
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// CHECK: [B3]
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// CHECK-NEXT: 1: 1
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// CHECK-NEXT: Preds (1): B4
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// CHECK-NEXT: Succs (1): B1
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// CHECK: [B4]
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// CHECK-NEXT: 1: 0
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// CHECK-NEXT: 2: x([B4.1]) (Member initializer)
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// CHECK-NEXT: 3: b
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// CHECK-NEXT: 4: [B4.3] (ImplicitCastExpr, LValueToRValue, _Bool)
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// CHECK-NEXT: T: [B4.4] ? ... : ...
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// CHECK-NEXT: Preds (1): B5
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// CHECK-NEXT: Succs (2): B2 B3
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (1): B1
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TestControlFlow::TestControlFlow(bool b)
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: y(b ? 0 : 1)
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, x(0)
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, z(y) {
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int v;
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}
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class TestDelegating {
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int x, z;
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public:
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// CHECK: TestDelegating()
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// CHECK: [B2 (ENTRY)]
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// CHECK-NEXT: Succs (1): B1
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// CHECK: [B1]
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// CHECK-NEXT: 1: 2
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// CHECK-NEXT: 2: 3
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// WARNINGS-NEXT: 3: [B1.1], [B1.2] (CXXConstructExpr, class TestDelegating)
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// ANALYZER-NEXT: 3: [B1.1], [B1.2] (CXXConstructExpr, TestDelegating([B1.1], [B1.2]) (Delegating initializer), class TestDelegating)
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// CHECK-NEXT: 4: TestDelegating([B1.3]) (Delegating initializer)
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// CHECK-NEXT: Preds (1): B2
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (1): B1
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TestDelegating() : TestDelegating(2, 3) {}
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// CHECK: TestDelegating(int x, int z)
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// CHECK: [B2 (ENTRY)]
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// CHECK-NEXT: Succs (1): B1
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// CHECK: [B1]
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// CHECK-NEXT: 1: x
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// CHECK-NEXT: 2: [B1.1] (ImplicitCastExpr, LValueToRValue, int)
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// CHECK-NEXT: 3: x([B1.2]) (Member initializer)
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// CHECK-NEXT: 4: z
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// CHECK-NEXT: 5: [B1.4] (ImplicitCastExpr, LValueToRValue, int)
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// CHECK-NEXT: 6: z([B1.5]) (Member initializer)
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// CHECK-NEXT: Preds (1): B2
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (1): B1
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TestDelegating(int x, int z) : x(x), z(z) {}
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};
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class TestMoreControlFlow : public virtual A {
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A a;
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public:
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TestMoreControlFlow(bool coin);
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};
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// CHECK: TestMoreControlFlow::TestMoreControlFlow(bool coin)
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// CHECK: [B10 (ENTRY)]
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// CHECK-NEXT: Succs (1): B9
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// CHECK: [B1]
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// CHECK-NEXT: 1: [B4.2] ? [B2.1] : [B3.1]
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// WARNINGS-NEXT: 2: [B1.1] (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 2: [B1.1] (CXXConstructExpr, a([B1.1]) (Member initializer), class A)
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// CHECK-NEXT: 3: a([B1.2]) (Member initializer)
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// CHECK-NEXT: Preds (2): B2 B3
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// CHECK-NEXT: Succs (1): B0
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// CHECK: [B2]
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// CHECK-NEXT: 1: 3
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// CHECK-NEXT: Preds (1): B4
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// CHECK-NEXT: Succs (1): B1
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// CHECK: [B3]
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// CHECK-NEXT: 1: 4
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// CHECK-NEXT: Preds (1): B4
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// CHECK-NEXT: Succs (1): B1
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// CHECK: [B4]
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// CHECK-NEXT: 1: coin
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// CHECK-NEXT: 2: [B4.1] (ImplicitCastExpr, LValueToRValue, _Bool)
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// CHECK-NEXT: T: [B4.2] ? ... : ...
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// CHECK-NEXT: Preds (2): B5 B9
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// CHECK-NEXT: Succs (2): B2 B3
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// CHECK: [B5]
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// CHECK-NEXT: 1: [B8.2] ? [B6.1] : [B7.1]
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// WARNINGS-NEXT: 2: [B5.1] (CXXConstructExpr, class A)
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// ANALYZER-NEXT: 2: [B5.1] (CXXConstructExpr, A([B5.1]) (Base initializer), class A)
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// CHECK-NEXT: 3: A([B5.2]) (Base initializer)
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// CHECK-NEXT: Preds (2): B6 B7
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// CHECK-NEXT: Succs (1): B4
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// CHECK: [B6]
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// CHECK-NEXT: 1: 1
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// CHECK-NEXT: Preds (1): B8
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// CHECK-NEXT: Succs (1): B5
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// CHECK: [B7]
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// CHECK-NEXT: 1: 2
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// CHECK-NEXT: Preds (1): B8
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// CHECK-NEXT: Succs (1): B5
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// CHECK: [B8]
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// CHECK-NEXT: 1: coin
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// CHECK-NEXT: 2: [B8.1] (ImplicitCastExpr, LValueToRValue, _Bool)
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// CHECK-NEXT: T: [B8.2] ? ... : ...
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// CHECK-NEXT: Preds (1): B9
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// CHECK-NEXT: Succs (2): B6 B7
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// CHECK: [B9]
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// CHECK-NEXT: T: (See if most derived ctor has already initialized vbases)
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// CHECK-NEXT: Preds (1): B10
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// CHECK-NEXT: Succs (2): B4 B8
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// CHECK: [B0 (EXIT)]
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// CHECK-NEXT: Preds (1): B1
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TestMoreControlFlow::TestMoreControlFlow(bool coin)
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: A(coin ? 1 : 2), a(coin ? 3 : 4) {}
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