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jketemajketema
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C++: Add test case that shows that no destructors are attached to unwinds
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‎cpp/ql/test/library-tests/ir/ir/PrintAST.expected

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@@ -22605,6 +22605,41 @@ ir.cpp:
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# 2530| ValueCategory = lvalue
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# 2530| getStmt(1): [LabelStmt] label ...:
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# 2531| getStmt(2): [ReturnStmt] return ...
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# 2533| [TopLevelFunction] void destructor_possibly_not_handled()
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# 2533| <params>:
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# 2533| getEntryPoint(): [BlockStmt] { ... }
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# 2534| getStmt(0): [DeclStmt] declaration
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# 2534| getDeclarationEntry(0): [VariableDeclarationEntry] definition of x
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# 2534| Type = [Class] ClassWithDestructor
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# 2534| getVariable().getInitializer(): [Initializer] initializer for x
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# 2534| getExpr(): [ConstructorCall] call to ClassWithDestructor
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# 2534| Type = [VoidType] void
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# 2534| ValueCategory = prvalue
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# 2535| getStmt(1): [TryStmt] try { ... }
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# 2535| getStmt(): [BlockStmt] { ... }
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# 2536| getStmt(0): [ExprStmt] ExprStmt
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# 2536| getExpr(): [ThrowExpr] throw ...
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# 2536| Type = [IntType] int
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# 2536| ValueCategory = prvalue
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# 2536| getExpr(): [Literal] 42
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# 2536| Type = [IntType] int
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# 2536| Value = [Literal] 42
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# 2536| ValueCategory = prvalue
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# 2538| getChild(1): [Handler] <handler>
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# 2538| getBlock(): [CatchBlock] { ... }
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# 2540| getImplicitDestructorCall(0): [DestructorCall] call to ~ClassWithDestructor
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# 2540| Type = [VoidType] void
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# 2540| ValueCategory = prvalue
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# 2540| getQualifier(): [VariableAccess] x
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# 2540| Type = [Class] ClassWithDestructor
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# 2540| ValueCategory = lvalue
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# 2540| getStmt(2): [ReturnStmt] return ...
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# 2540| getImplicitDestructorCall(0): [DestructorCall] call to ~ClassWithDestructor
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# 2540| Type = [VoidType] void
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# 2540| ValueCategory = prvalue
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# 2540| getQualifier(): [VariableAccess] x
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# 2540| Type = [Class] ClassWithDestructor
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# 2540| ValueCategory = lvalue
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perf-regression.cpp:
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# 4| [CopyAssignmentOperator] Big& Big::operator=(Big const&)
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# 4| <params>:

‎cpp/ql/test/library-tests/ir/ir/aliased_ir.expected

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Original file line numberDiff line numberDiff line change
@@ -18177,6 +18177,64 @@ ir.cpp:
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# 2521| v2521_8(void) = AliasedUse : ~m2530_17
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# 2521| v2521_9(void) = ExitFunction :
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# 2533| void destructor_possibly_not_handled()
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# 2533| Block 0
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# 2533| v2533_1(void) = EnterFunction :
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# 2533| m2533_2(unknown) = AliasedDefinition :
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# 2533| m2533_3(unknown) = InitializeNonLocal :
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# 2533| m2533_4(unknown) = Chi : total:m2533_2, partial:m2533_3
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# 2534| r2534_1(glval<ClassWithDestructor>) = VariableAddress[x] :
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# 2534| m2534_2(ClassWithDestructor) = Uninitialized[x] : &:r2534_1
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# 2534| r2534_3(glval<unknown>) = FunctionAddress[ClassWithDestructor] :
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# 2534| v2534_4(void) = Call[ClassWithDestructor] : func:r2534_3, this:r2534_1
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# 2534| m2534_5(unknown) = ^CallSideEffect : ~m2533_4
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# 2534| m2534_6(unknown) = Chi : total:m2533_4, partial:m2534_5
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# 2534| m2534_7(ClassWithDestructor) = ^IndirectMayWriteSideEffect[-1] : &:r2534_1
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# 2534| m2534_8(ClassWithDestructor) = Chi : total:m2534_2, partial:m2534_7
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# 2536| r2536_1(glval<int>) = VariableAddress[#throw2536:5] :
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# 2536| r2536_2(int) = Constant[42] :
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# 2536| m2536_3(int) = Store[#throw2536:5] : &:r2536_1, r2536_2
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# 2536| v2536_4(void) = ThrowValue : &:r2536_1, m2536_3
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#-----| Exception -> Block 3
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# 2533| Block 1
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# 2533| m2533_5(unknown) = Phi : from 2:~m2534_6, from 4:~m2540_14
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# 2533| v2533_6(void) = AliasedUse : ~m2533_5
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# 2533| v2533_7(void) = ExitFunction :
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# 2533| Block 2
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# 2533| v2533_8(void) = Unwind :
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#-----| Goto -> Block 1
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# 2538| Block 3
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# 2538| v2538_1(void) = CatchByType[char] :
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#-----| Exception -> Block 2
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#-----| Goto -> Block 4
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# 2538| Block 4
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# 2538| r2538_2(glval<char>) = VariableAddress[(unnamed parameter 0)] :
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# 2538| m2538_3(char) = InitializeParameter[(unnamed parameter 0)] : &:r2538_2
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# 2538| v2538_4(void) = NoOp :
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# 2540| r2540_1(glval<ClassWithDestructor>) = VariableAddress[x] :
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# 2540| r2540_2(glval<unknown>) = FunctionAddress[~ClassWithDestructor] :
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# 2540| v2540_3(void) = Call[~ClassWithDestructor] : func:r2540_2, this:r2540_1
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# 2540| m2540_4(unknown) = ^CallSideEffect : ~m2534_6
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# 2540| m2540_5(unknown) = Chi : total:m2534_6, partial:m2540_4
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# 2540| v2540_6(void) = ^IndirectReadSideEffect[-1] : &:r2540_1, m2534_8
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# 2540| m2540_7(ClassWithDestructor) = ^IndirectMayWriteSideEffect[-1] : &:r2540_1
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# 2540| m2540_8(ClassWithDestructor) = Chi : total:m2534_8, partial:m2540_7
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# 2540| v2540_9(void) = NoOp :
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# 2540| r2540_10(glval<ClassWithDestructor>) = VariableAddress[x] :
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# 2540| r2540_11(glval<unknown>) = FunctionAddress[~ClassWithDestructor] :
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# 2540| v2540_12(void) = Call[~ClassWithDestructor] : func:r2540_11, this:r2540_10
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# 2540| m2540_13(unknown) = ^CallSideEffect : ~m2540_5
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# 2540| m2540_14(unknown) = Chi : total:m2540_5, partial:m2540_13
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# 2540| v2540_15(void) = ^IndirectReadSideEffect[-1] : &:r2540_10, m2540_8
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# 2540| m2540_16(ClassWithDestructor) = ^IndirectMayWriteSideEffect[-1] : &:r2540_10
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# 2540| m2540_17(ClassWithDestructor) = Chi : total:m2540_8, partial:m2540_16
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# 2533| v2533_9(void) = ReturnVoid :
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#-----| Goto -> Block 1
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perf-regression.cpp:
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# 6| void Big::Big()
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# 6| Block 0

‎cpp/ql/test/library-tests/ir/ir/ir.cpp

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Original file line numberDiff line numberDiff line change
@@ -2530,4 +2530,13 @@ void destruction_in_switch_3(int c) {
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}
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}
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void destructor_possibly_not_handled() {
2534+
ClassWithDestructor x;
2535+
try {
2536+
throw 42;
2537+
}
2538+
catch(char) {
2539+
}
2540+
}
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// semmle-extractor-options: -std=c++20 --clang

‎cpp/ql/test/library-tests/ir/ir/raw_ir.expected

Lines changed: 50 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -16553,6 +16553,56 @@ ir.cpp:
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# 2521| v2521_7(void) = AliasedUse : ~m?
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# 2521| v2521_8(void) = ExitFunction :
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# 2533| void destructor_possibly_not_handled()
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# 2533| Block 0
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# 2533| v2533_1(void) = EnterFunction :
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# 2533| mu2533_2(unknown) = AliasedDefinition :
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# 2533| mu2533_3(unknown) = InitializeNonLocal :
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# 2534| r2534_1(glval<ClassWithDestructor>) = VariableAddress[x] :
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# 2534| mu2534_2(ClassWithDestructor) = Uninitialized[x] : &:r2534_1
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# 2534| r2534_3(glval<unknown>) = FunctionAddress[ClassWithDestructor] :
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# 2534| v2534_4(void) = Call[ClassWithDestructor] : func:r2534_3, this:r2534_1
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# 2534| mu2534_5(unknown) = ^CallSideEffect : ~m?
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# 2534| mu2534_6(ClassWithDestructor) = ^IndirectMayWriteSideEffect[-1] : &:r2534_1
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# 2536| r2536_1(glval<int>) = VariableAddress[#throw2536:5] :
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# 2536| r2536_2(int) = Constant[42] :
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# 2536| mu2536_3(int) = Store[#throw2536:5] : &:r2536_1, r2536_2
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# 2536| v2536_4(void) = ThrowValue : &:r2536_1, ~m?
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#-----| Exception -> Block 3
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# 2533| Block 1
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# 2533| v2533_4(void) = AliasedUse : ~m?
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# 2533| v2533_5(void) = ExitFunction :
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# 2533| Block 2
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# 2533| v2533_6(void) = Unwind :
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#-----| Goto -> Block 1
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# 2538| Block 3
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# 2538| v2538_1(void) = CatchByType[char] :
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#-----| Exception -> Block 2
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#-----| Goto -> Block 4
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# 2538| Block 4
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# 2538| r2538_2(glval<char>) = VariableAddress[(unnamed parameter 0)] :
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# 2538| mu2538_3(char) = InitializeParameter[(unnamed parameter 0)] : &:r2538_2
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# 2538| v2538_4(void) = NoOp :
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# 2540| r2540_1(glval<ClassWithDestructor>) = VariableAddress[x] :
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# 2540| r2540_2(glval<unknown>) = FunctionAddress[~ClassWithDestructor] :
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# 2540| v2540_3(void) = Call[~ClassWithDestructor] : func:r2540_2, this:r2540_1
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# 2540| mu2540_4(unknown) = ^CallSideEffect : ~m?
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# 2540| v2540_5(void) = ^IndirectReadSideEffect[-1] : &:r2540_1, ~m?
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# 2540| mu2540_6(ClassWithDestructor) = ^IndirectMayWriteSideEffect[-1] : &:r2540_1
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# 2540| v2540_7(void) = NoOp :
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# 2540| r2540_8(glval<ClassWithDestructor>) = VariableAddress[x] :
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# 2540| r2540_9(glval<unknown>) = FunctionAddress[~ClassWithDestructor] :
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# 2540| v2540_10(void) = Call[~ClassWithDestructor] : func:r2540_9, this:r2540_8
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# 2540| mu2540_11(unknown) = ^CallSideEffect : ~m?
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# 2540| v2540_12(void) = ^IndirectReadSideEffect[-1] : &:r2540_8, ~m?
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# 2540| mu2540_13(ClassWithDestructor) = ^IndirectMayWriteSideEffect[-1] : &:r2540_8
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# 2533| v2533_7(void) = ReturnVoid :
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#-----| Goto -> Block 1
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perf-regression.cpp:
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# 6| void Big::Big()
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# 6| Block 0

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