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C++: add getIRVariable for this temp variables

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This commit is contained in:
Robert Marsh
2020-05-22 15:43:34 -07:00
parent 8a53dc882d
commit b4a947ddf1
3 changed files with 35 additions and 33 deletions
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5
cpp/ql/src/semmle/code/cpp/ir/implementation/raw/internal/TranslatedExpr.qll
View File

@@ -694,6 +694,11 @@ class TranslatedThisExpr extends TranslatedNonConstantExpr {
operandTag instanceof AddressOperandTag and
result = getInstruction(ThisAddressTag())
}
override IRVariable getInstructionVariable(InstructionTag tag) {
tag = ThisAddressTag() and
result = this.getEnclosingFunction().getThisVariable()
}
}
abstract class TranslatedVariableAccess extends TranslatedNonConstantExpr {

3
cpp/ql/test/library-tests/ir/escape/ssa_escape.expected
View File

@@ -1,3 +0,0 @@
| escape.cpp:211:7:211:7 | c |
| escape.cpp:219:7:219:8 | c3 |
| escape.cpp:223:7:223:8 | c4 |

60
cpp/ql/test/library-tests/ir/ir/raw_ir.expected
View File

@@ -12,7 +12,7 @@ bad_asts.cpp:
# 9| mu9_9(int) = InitializeParameter[y] : &:r9_8
# 10| r10_1(glval<int>) = VariableAddress[#return] :
# 10| r10_2(int) = Constant[6] :
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(S *) = Load : &:r0_1, ~m?
# 10| r10_3(glval<int>) = FieldAddress[x] : r0_2
# 10| r10_4(int) = Load : &:r10_3, ~m?
@@ -3518,37 +3518,37 @@ ir.cpp:
# 642| r642_6(glval<C>) = Load : &:r642_4, ~m?
# 642| mu642_7(C) = InitializeIndirection[#this] : &:r642_6
# 643| r643_1(int) = Constant[0] :
# 643| r643_2(glval<unknown>) = VariableAddress :
# 643| r643_2(glval<unknown>) = VariableAddress[#this] :
# 643| r643_3(C *) = Load : &:r643_2, ~m?
# 643| r643_4(glval<int>) = FieldAddress[m_a] : r643_3
# 643| mu643_5(int) = Store : &:r643_4, r643_1
# 644| r644_1(int) = Constant[1] :
# 644| r644_2(glval<unknown>) = VariableAddress :
# 644| r644_2(glval<unknown>) = VariableAddress[#this] :
# 644| r644_3(C *) = Load : &:r644_2, ~m?
# 644| r644_4(glval<C>) = CopyValue : r644_3
# 644| r644_5(glval<int>) = FieldAddress[m_a] : r644_4
# 644| mu644_6(int) = Store : &:r644_5, r644_1
# 645| r645_1(int) = Constant[2] :
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(C *) = Load : &:r0_1, ~m?
# 645| r645_2(glval<int>) = FieldAddress[m_a] : r0_2
# 645| mu645_3(int) = Store : &:r645_2, r645_1
# 646| r646_1(glval<int>) = VariableAddress[x] :
# 646| mu646_2(int) = Uninitialized[x] : &:r646_1
# 647| r647_1(glval<unknown>) = VariableAddress :
# 647| r647_1(glval<unknown>) = VariableAddress[#this] :
# 647| r647_2(C *) = Load : &:r647_1, ~m?
# 647| r647_3(glval<int>) = FieldAddress[m_a] : r647_2
# 647| r647_4(int) = Load : &:r647_3, ~m?
# 647| r647_5(glval<int>) = VariableAddress[x] :
# 647| mu647_6(int) = Store : &:r647_5, r647_4
# 648| r648_1(glval<unknown>) = VariableAddress :
# 648| r648_1(glval<unknown>) = VariableAddress[#this] :
# 648| r648_2(C *) = Load : &:r648_1, ~m?
# 648| r648_3(glval<C>) = CopyValue : r648_2
# 648| r648_4(glval<int>) = FieldAddress[m_a] : r648_3
# 648| r648_5(int) = Load : &:r648_4, ~m?
# 648| r648_6(glval<int>) = VariableAddress[x] :
# 648| mu648_7(int) = Store : &:r648_6, r648_5
#-----| r0_3(glval<unknown>) = VariableAddress :
#-----| r0_3(glval<unknown>) = VariableAddress[#this] :
#-----| r0_4(C *) = Load : &:r0_3, ~m?
# 649| r649_1(glval<int>) = FieldAddress[m_a] : r0_4
# 649| r649_2(int) = Load : &:r649_1, ~m?
@@ -3568,7 +3568,7 @@ ir.cpp:
# 652| mu652_5(glval<C>) = InitializeParameter[#this] : &:r652_4
# 652| r652_6(glval<C>) = Load : &:r652_4, ~m?
# 652| mu652_7(C) = InitializeIndirection[#this] : &:r652_6
# 653| r653_1(glval<unknown>) = VariableAddress :
# 653| r653_1(glval<unknown>) = VariableAddress[#this] :
# 653| r653_2(C *) = Load : &:r653_1, ~m?
# 653| r653_3(glval<unknown>) = FunctionAddress[InstanceMemberFunction] :
# 653| r653_4(int) = Constant[0] :
@@ -3576,7 +3576,7 @@ ir.cpp:
# 653| mu653_6(unknown) = ^CallSideEffect : ~m?
# 653| v653_7(void) = ^BufferReadSideEffect[-1] : &:r653_2, ~m?
# 653| mu653_8(C) = ^IndirectMayWriteSideEffect[-1] : &:r653_2
# 654| r654_1(glval<unknown>) = VariableAddress :
# 654| r654_1(glval<unknown>) = VariableAddress[#this] :
# 654| r654_2(C *) = Load : &:r654_1, ~m?
# 654| r654_3(glval<C>) = CopyValue : r654_2
# 654| r654_4(glval<unknown>) = FunctionAddress[InstanceMemberFunction] :
@@ -3585,7 +3585,7 @@ ir.cpp:
# 654| mu654_7(unknown) = ^CallSideEffect : ~m?
# 654| v654_8(void) = ^BufferReadSideEffect[-1] : &:r654_3, ~m?
# 654| mu654_9(C) = ^IndirectMayWriteSideEffect[-1] : &:r654_3
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(C *) = Load : &:r0_1, ~m?
# 655| r655_1(glval<unknown>) = FunctionAddress[InstanceMemberFunction] :
# 655| r655_2(int) = Constant[2] :
@@ -3991,7 +3991,7 @@ ir.cpp:
#-----| mu0_2(Base &) = InitializeParameter[p#0] : &:r0_1
#-----| r0_3(Base &) = Load : &:r0_1, ~m?
#-----| mu0_4(unknown) = InitializeIndirection[p#0] : &:r0_3
#-----| r0_5(glval<unknown>) = VariableAddress :
#-----| r0_5(glval<unknown>) = VariableAddress[#this] :
#-----| r0_6(Base *) = Load : &:r0_5, ~m?
#-----| r0_7(glval<String>) = FieldAddress[base_s] : r0_6
#-----| r0_8(String *) = CopyValue : r0_7
@@ -4009,7 +4009,7 @@ ir.cpp:
#-----| mu0_17(unknown) = ^BufferMayWriteSideEffect[0] : &:r0_13
#-----| r0_18(glval<String>) = CopyValue : r745_9
#-----| r0_19(glval<Base &>) = VariableAddress[#return] :
#-----| r0_20(glval<unknown>) = VariableAddress :
#-----| r0_20(glval<unknown>) = VariableAddress[#this] :
#-----| r0_21(Base *) = Load : &:r0_20, ~m?
#-----| r0_22(glval<Base>) = CopyValue : r0_21
#-----| r0_23(Base &) = CopyValue : r0_22
@@ -4094,7 +4094,7 @@ ir.cpp:
#-----| mu0_2(Middle &) = InitializeParameter[p#0] : &:r0_1
#-----| r0_3(Middle &) = Load : &:r0_1, ~m?
#-----| mu0_4(unknown) = InitializeIndirection[p#0] : &:r0_3
#-----| r0_5(glval<unknown>) = VariableAddress :
#-----| r0_5(glval<unknown>) = VariableAddress[#this] :
#-----| r0_6(Middle *) = Load : &:r0_5, ~m?
#-----| r0_7(Base *) = ConvertToNonVirtualBase[Middle : Base] : r0_6
# 754| r754_8(glval<unknown>) = FunctionAddress[operator=] :
@@ -4112,7 +4112,7 @@ ir.cpp:
#-----| mu0_17(Base) = ^IndirectMayWriteSideEffect[-1] : &:r0_7
#-----| mu0_18(unknown) = ^BufferMayWriteSideEffect[0] : &:r0_14
#-----| r0_19(glval<Base>) = CopyValue : r754_9
#-----| r0_20(glval<unknown>) = VariableAddress :
#-----| r0_20(glval<unknown>) = VariableAddress[#this] :
#-----| r0_21(Middle *) = Load : &:r0_20, ~m?
#-----| r0_22(glval<String>) = FieldAddress[middle_s] : r0_21
#-----| r0_23(String *) = CopyValue : r0_22
@@ -4130,7 +4130,7 @@ ir.cpp:
#-----| mu0_32(unknown) = ^BufferMayWriteSideEffect[0] : &:r0_28
#-----| r0_33(glval<String>) = CopyValue : r754_12
#-----| r0_34(glval<Middle &>) = VariableAddress[#return] :
#-----| r0_35(glval<unknown>) = VariableAddress :
#-----| r0_35(glval<unknown>) = VariableAddress[#this] :
#-----| r0_36(Middle *) = Load : &:r0_35, ~m?
#-----| r0_37(glval<Middle>) = CopyValue : r0_36
#-----| r0_38(Middle &) = CopyValue : r0_37
@@ -4200,7 +4200,7 @@ ir.cpp:
#-----| mu0_2(Derived &) = InitializeParameter[p#0] : &:r0_1
#-----| r0_3(Derived &) = Load : &:r0_1, ~m?
#-----| mu0_4(unknown) = InitializeIndirection[p#0] : &:r0_3
#-----| r0_5(glval<unknown>) = VariableAddress :
#-----| r0_5(glval<unknown>) = VariableAddress[#this] :
#-----| r0_6(Derived *) = Load : &:r0_5, ~m?
#-----| r0_7(Middle *) = ConvertToNonVirtualBase[Derived : Middle] : r0_6
# 763| r763_8(glval<unknown>) = FunctionAddress[operator=] :
@@ -4218,7 +4218,7 @@ ir.cpp:
#-----| mu0_17(Middle) = ^IndirectMayWriteSideEffect[-1] : &:r0_7
#-----| mu0_18(unknown) = ^BufferMayWriteSideEffect[0] : &:r0_14
#-----| r0_19(glval<Middle>) = CopyValue : r763_9
#-----| r0_20(glval<unknown>) = VariableAddress :
#-----| r0_20(glval<unknown>) = VariableAddress[#this] :
#-----| r0_21(Derived *) = Load : &:r0_20, ~m?
#-----| r0_22(glval<String>) = FieldAddress[derived_s] : r0_21
#-----| r0_23(String *) = CopyValue : r0_22
@@ -4236,7 +4236,7 @@ ir.cpp:
#-----| mu0_32(unknown) = ^BufferMayWriteSideEffect[0] : &:r0_28
#-----| r0_33(glval<String>) = CopyValue : r763_12
#-----| r0_34(glval<Derived &>) = VariableAddress[#return] :
#-----| r0_35(glval<unknown>) = VariableAddress :
#-----| r0_35(glval<unknown>) = VariableAddress[#this] :
#-----| r0_36(Derived *) = Load : &:r0_35, ~m?
#-----| r0_37(glval<Derived>) = CopyValue : r0_36
#-----| r0_38(Derived &) = CopyValue : r0_37
@@ -5853,7 +5853,7 @@ ir.cpp:
# 1043| r1043_8(glval<float>) = VariableAddress[f] :
# 1043| mu1043_9(float) = InitializeParameter[f] : &:r1043_8
# 1043| r1043_10(glval<char>) = VariableAddress[#return] :
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(lambda [] type at line 1043, col. 21 *) = Load : &:r0_1, ~m?
#-----| r0_3(glval<String &>) = FieldAddress[s] : r0_2
#-----| r0_4(String &) = Load : &:r0_3, ~m?
@@ -5863,7 +5863,7 @@ ir.cpp:
# 1043| mu1043_14(unknown) = ^CallSideEffect : ~m?
# 1043| v1043_15(void) = ^BufferReadSideEffect[-1] : &:r1043_11, ~m?
# 1043| mu1043_16(String) = ^IndirectMayWriteSideEffect[-1] : &:r1043_11
#-----| r0_5(glval<unknown>) = VariableAddress :
#-----| r0_5(glval<unknown>) = VariableAddress[#this] :
#-----| r0_6(lambda [] type at line 1043, col. 21 *) = Load : &:r0_5, ~m?
#-----| r0_7(glval<int &>) = FieldAddress[x] : r0_6
#-----| r0_8(int &) = Load : &:r0_7, ~m?
@@ -5906,7 +5906,7 @@ ir.cpp:
# 1045| r1045_8(glval<float>) = VariableAddress[f] :
# 1045| mu1045_9(float) = InitializeParameter[f] : &:r1045_8
# 1045| r1045_10(glval<char>) = VariableAddress[#return] :
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(lambda [] type at line 1045, col. 21 *) = Load : &:r0_1, ~m?
#-----| r0_3(glval<String>) = FieldAddress[s] : r0_2
# 1045| r1045_11(glval<unknown>) = FunctionAddress[c_str] :
@@ -5914,7 +5914,7 @@ ir.cpp:
# 1045| mu1045_13(unknown) = ^CallSideEffect : ~m?
#-----| v0_4(void) = ^BufferReadSideEffect[-1] : &:r0_3, ~m?
#-----| mu0_5(String) = ^IndirectMayWriteSideEffect[-1] : &:r0_3
#-----| r0_6(glval<unknown>) = VariableAddress :
#-----| r0_6(glval<unknown>) = VariableAddress[#this] :
#-----| r0_7(lambda [] type at line 1045, col. 21 *) = Load : &:r0_6, ~m?
#-----| r0_8(glval<int>) = FieldAddress[x] : r0_7
#-----| r0_9(int) = Load : &:r0_8, ~m?
@@ -5938,7 +5938,7 @@ ir.cpp:
# 1047| r1047_8(glval<float>) = VariableAddress[f] :
# 1047| mu1047_9(float) = InitializeParameter[f] : &:r1047_8
# 1047| r1047_10(glval<char>) = VariableAddress[#return] :
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(lambda [] type at line 1047, col. 30 *) = Load : &:r0_1, ~m?
#-----| r0_3(glval<String &>) = FieldAddress[s] : r0_2
#-----| r0_4(String &) = Load : &:r0_3, ~m?
@@ -5987,7 +5987,7 @@ ir.cpp:
# 1049| r1049_8(glval<float>) = VariableAddress[f] :
# 1049| mu1049_9(float) = InitializeParameter[f] : &:r1049_8
# 1049| r1049_10(glval<char>) = VariableAddress[#return] :
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(lambda [] type at line 1049, col. 30 *) = Load : &:r0_1, ~m?
#-----| r0_3(glval<String>) = FieldAddress[s] : r0_2
# 1049| r1049_11(glval<unknown>) = FunctionAddress[c_str] :
@@ -6016,7 +6016,7 @@ ir.cpp:
# 1051| r1051_8(glval<float>) = VariableAddress[f] :
# 1051| mu1051_9(float) = InitializeParameter[f] : &:r1051_8
# 1051| r1051_10(glval<char>) = VariableAddress[#return] :
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(lambda [] type at line 1051, col. 32 *) = Load : &:r0_1, ~m?
#-----| r0_3(glval<String &>) = FieldAddress[s] : r0_2
#-----| r0_4(String &) = Load : &:r0_3, ~m?
@@ -6026,7 +6026,7 @@ ir.cpp:
# 1051| mu1051_14(unknown) = ^CallSideEffect : ~m?
# 1051| v1051_15(void) = ^BufferReadSideEffect[-1] : &:r1051_11, ~m?
# 1051| mu1051_16(String) = ^IndirectMayWriteSideEffect[-1] : &:r1051_11
#-----| r0_5(glval<unknown>) = VariableAddress :
#-----| r0_5(glval<unknown>) = VariableAddress[#this] :
#-----| r0_6(lambda [] type at line 1051, col. 32 *) = Load : &:r0_5, ~m?
#-----| r0_7(glval<int>) = FieldAddress[x] : r0_6
#-----| r0_8(int) = Load : &:r0_7, ~m?
@@ -6050,7 +6050,7 @@ ir.cpp:
# 1054| r1054_8(glval<float>) = VariableAddress[f] :
# 1054| mu1054_9(float) = InitializeParameter[f] : &:r1054_8
# 1054| r1054_10(glval<char>) = VariableAddress[#return] :
#-----| r0_1(glval<unknown>) = VariableAddress :
#-----| r0_1(glval<unknown>) = VariableAddress[#this] :
#-----| r0_2(lambda [] type at line 1054, col. 23 *) = Load : &:r0_1, ~m?
#-----| r0_3(glval<String &>) = FieldAddress[s] : r0_2
#-----| r0_4(String &) = Load : &:r0_3, ~m?
@@ -6060,16 +6060,16 @@ ir.cpp:
# 1054| mu1054_14(unknown) = ^CallSideEffect : ~m?
# 1054| v1054_15(void) = ^BufferReadSideEffect[-1] : &:r1054_11, ~m?
# 1054| mu1054_16(String) = ^IndirectMayWriteSideEffect[-1] : &:r1054_11
#-----| r0_5(glval<unknown>) = VariableAddress :
#-----| r0_5(glval<unknown>) = VariableAddress[#this] :
#-----| r0_6(lambda [] type at line 1054, col. 23 *) = Load : &:r0_5, ~m?
#-----| r0_7(glval<int>) = FieldAddress[x] : r0_6
#-----| r0_8(int) = Load : &:r0_7, ~m?
#-----| r0_9(glval<unknown>) = VariableAddress :
#-----| r0_9(glval<unknown>) = VariableAddress[#this] :
#-----| r0_10(lambda [] type at line 1054, col. 23 *) = Load : &:r0_9, ~m?
# 1054| r1054_17(glval<int>) = FieldAddress[i] : r0_10
# 1054| r1054_18(int) = Load : &:r1054_17, ~m?
# 1054| r1054_19(int) = Add : r0_8, r1054_18
#-----| r0_11(glval<unknown>) = VariableAddress :
#-----| r0_11(glval<unknown>) = VariableAddress[#this] :
#-----| r0_12(lambda [] type at line 1054, col. 23 *) = Load : &:r0_11, ~m?
# 1054| r1054_20(glval<int &>) = FieldAddress[j] : r0_12
# 1054| r1054_21(int &) = Load : &:r1054_20, ~m?