forked from OSchip/llvm-project
1003 lines
35 KiB
C++
1003 lines
35 KiB
C++
// RUN: %clang_analyze_cc1 %s -std=c++14 \
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// RUN: -verify=expected,tracking \
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// RUN: -analyzer-config track-conditions=true \
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// RUN: -analyzer-output=text \
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// RUN: -analyzer-checker=core
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// RUN: not %clang_analyze_cc1 -std=c++14 -verify %s \
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// RUN: -analyzer-checker=core \
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// RUN: -analyzer-config track-conditions=false \
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// RUN: -analyzer-config track-conditions-debug=true \
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// RUN: 2>&1 | FileCheck %s -check-prefix=CHECK-INVALID-DEBUG
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// CHECK-INVALID-DEBUG: (frontend): invalid input for analyzer-config option
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// CHECK-INVALID-DEBUG-SAME: 'track-conditions-debug', that expects
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// CHECK-INVALID-DEBUG-SAME: 'track-conditions' to also be enabled
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//
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// RUN: %clang_analyze_cc1 %s -std=c++14 \
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// RUN: -verify=expected,tracking,debug \
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// RUN: -analyzer-config track-conditions=true \
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// RUN: -analyzer-config track-conditions-debug=true \
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// RUN: -analyzer-output=text \
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// RUN: -analyzer-checker=core
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// RUN: %clang_analyze_cc1 %s -std=c++14 -verify \
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// RUN: -analyzer-output=text \
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// RUN: -analyzer-config track-conditions=false \
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// RUN: -analyzer-checker=core
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namespace example_1 {
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int flag;
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bool coin();
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void foo() {
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flag = coin(); // tracking-note-re{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
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}
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void test() {
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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flag = 1;
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foo(); // TODO: Add nodes here about flag's value being invalidated.
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if (flag) // expected-note-re {{{{^}}Assuming 'flag' is 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking false branch{{$}}}}
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x = new int;
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foo(); // tracking-note-re{{{{^}}Calling 'foo'{{$}}}}
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// tracking-note-re@-1{{{{^}}Returning from 'foo'{{$}}}}
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if (flag) // expected-note-re {{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace example_1
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namespace example_2 {
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int flag;
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bool coin();
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void foo() {
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flag = coin(); // tracking-note-re{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
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}
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void test() {
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int *x = 0;
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flag = 1;
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foo();
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if (flag) // expected-note-re {{{{^}}Assuming 'flag' is 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking false branch{{$}}}}
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x = new int;
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x = 0; // expected-note-re{{{{^}}Null pointer value stored to 'x'{{$}}}}
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foo(); // tracking-note-re{{{{^}}Calling 'foo'{{$}}}}
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// tracking-note-re@-1{{{{^}}Returning from 'foo'{{$}}}}
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if (flag) // expected-note-re {{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace example_2
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namespace global_variable_invalidation {
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int flag;
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bool coin();
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void foo() {
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// coin() could write bar, do it's invalidated.
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flag = coin(); // tracking-note-re{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
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// tracking-note-re@-1{{{{^}}Value assigned to 'bar', which participates in a condition later{{$}}}}
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}
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int bar;
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void test() {
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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flag = 1;
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foo(); // tracking-note-re{{{{^}}Calling 'foo'{{$}}}}
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// tracking-note-re@-1{{{{^}}Returning from 'foo'{{$}}}}
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if (bar) // expected-note-re {{{{^}}Assuming 'bar' is not equal to 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'bar'{{$}}}}
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if (flag) // expected-note-re {{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace global_variable_invalidation
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namespace variable_declaration_in_condition {
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bool coin();
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bool foo() {
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return coin();
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}
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int bar;
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void test() {
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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if (int flag = foo()) // debug-note-re{{{{^}}Tracking condition 'flag'{{$}}}}
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// expected-note-re@-1{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
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// expected-note-re@-2{{{{^}}Taking true branch{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace variable_declaration_in_condition
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namespace conversion_to_bool {
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bool coin();
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struct ConvertsToBool {
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operator bool() const { return coin(); }
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};
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void test() {
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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if (ConvertsToBool())
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// debug-note-re@-1{{{{^}}Tracking condition 'ConvertsToBool()'{{$}}}}
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// expected-note-re@-2{{{{^}}Assuming the condition is true{{$}}}}
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// expected-note-re@-3{{{{^}}Taking true branch{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace variable_declaration_in_condition
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namespace note_from_different_but_not_nested_stackframe {
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void nullptrDeref(int *ptr, bool True) {
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if (True) // expected-note-re{{{{^}}'True' is true{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'True'{{$}}}}
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*ptr = 5;
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// expected-note@-1{{Dereference of null pointer (loaded from variable 'ptr')}}
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// expected-warning@-2{{Dereference of null pointer (loaded from variable 'ptr')}}
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}
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void f() {
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int *ptr = nullptr;
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// expected-note-re@-1{{{{^}}'ptr' initialized to a null pointer value{{$}}}}
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bool True = true;
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nullptrDeref(ptr, True);
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// expected-note-re@-1{{{{^}}Passing null pointer value via 1st parameter 'ptr'{{$}}}}
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// expected-note-re@-2{{{{^}}Calling 'nullptrDeref'{{$}}}}
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}
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} // end of namespace note_from_different_but_not_nested_stackframe
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namespace important_returning_pointer_loaded_from {
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bool coin();
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int *getIntPtr();
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void storeValue(int **i) {
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*i = getIntPtr(); // tracking-note-re{{{{^}}Value assigned to 'i', which participates in a condition later{{$}}}}
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}
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int *conjurePointer() {
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int *i;
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storeValue(&i); // tracking-note-re{{{{^}}Calling 'storeValue'{{$}}}}
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// tracking-note-re@-1{{{{^}}Returning from 'storeValue'{{$}}}}
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return i; // tracking-note-re{{{{^}}Returning pointer (loaded from 'i'), which participates in a condition later{{$}}}}
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}
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void f(int *ptr) {
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if (ptr) // expected-note-re{{{{^}}Assuming 'ptr' is null{{$}}}}
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// expected-note-re@-1{{{{^}}Taking false branch{{$}}}}
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;
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if (!conjurePointer())
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// tracking-note-re@-1{{{{^}}Calling 'conjurePointer'{{$}}}}
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// tracking-note-re@-2{{{{^}}Returning from 'conjurePointer'{{$}}}}
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// debug-note-re@-3{{{{^}}Tracking condition '!conjurePointer()'{{$}}}}
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// expected-note-re@-4{{{{^}}Assuming the condition is true{{$}}}}
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// expected-note-re@-5{{{{^}}Taking true branch{{$}}}}
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*ptr = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace important_returning_pointer_loaded_from
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namespace unimportant_returning_pointer_loaded_from {
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bool coin();
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int *getIntPtr();
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int *conjurePointer() {
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int *i = getIntPtr();
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return i;
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}
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void f(int *ptr) {
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if (ptr) // expected-note-re{{{{^}}Assuming 'ptr' is null{{$}}}}
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// expected-note-re@-1{{{{^}}Taking false branch{{$}}}}
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;
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if (!conjurePointer())
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// debug-note-re@-1{{{{^}}Tracking condition '!conjurePointer()'{{$}}}}
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// expected-note-re@-2{{{{^}}Assuming the condition is true{{$}}}}
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// expected-note-re@-3{{{{^}}Taking true branch{{$}}}}
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*ptr = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace unimportant_returning_pointer_loaded_from
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namespace unimportant_returning_pointer_loaded_from_through_cast {
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void *conjure();
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int *cast(void *P) {
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return static_cast<int *>(P);
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}
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void f() {
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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if (cast(conjure()))
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// debug-note-re@-1{{{{^}}Tracking condition 'cast(conjure())'{{$}}}}
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// expected-note-re@-2{{{{^}}Assuming the condition is false{{$}}}}
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// expected-note-re@-3{{{{^}}Taking false branch{{$}}}}
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return;
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace unimportant_returning_pointer_loaded_from_through_cast
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namespace unimportant_returning_value_note {
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bool coin();
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bool flipCoin() { return coin(); }
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void i(int *ptr) {
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if (ptr) // expected-note-re{{{{^}}Assuming 'ptr' is null{{$}}}}
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// expected-note-re@-1{{{{^}}Taking false branch{{$}}}}
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;
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if (!flipCoin())
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// debug-note-re@-1{{{{^}}Tracking condition '!flipCoin()'{{$}}}}
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// expected-note-re@-2{{{{^}}Assuming the condition is true{{$}}}}
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// expected-note-re@-3{{{{^}}Taking true branch{{$}}}}
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*ptr = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace unimportant_returning_value_note
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namespace important_returning_value_note {
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bool coin();
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bool flipCoin() {
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if (coin()) // tracking-note-re{{{{^}}Assuming the condition is false{{$}}}}
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// tracking-note-re@-1{{{{^}}Taking false branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'coin()'{{$}}}}
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return true;
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return coin(); // tracking-note-re{{{{^}}Returning value, which participates in a condition later{{$}}}}
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}
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void i(int *ptr) {
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if (ptr) // expected-note-re{{{{^}}Assuming 'ptr' is null{{$}}}}
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// expected-note-re@-1{{{{^}}Taking false branch{{$}}}}
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;
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if (!flipCoin())
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// tracking-note-re@-1{{{{^}}Calling 'flipCoin'{{$}}}}
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// tracking-note-re@-2{{{{^}}Returning from 'flipCoin'{{$}}}}
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// debug-note-re@-3{{{{^}}Tracking condition '!flipCoin()'{{$}}}}
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// expected-note-re@-4{{{{^}}Assuming the condition is true{{$}}}}
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// expected-note-re@-5{{{{^}}Taking true branch{{$}}}}
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*ptr = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace important_returning_value_note
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namespace important_returning_value_note_in_linear_function {
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bool coin();
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struct super_complicated_template_hackery {
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static constexpr bool value = false;
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};
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bool flipCoin() {
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if (super_complicated_template_hackery::value)
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// tracking-note-re@-1{{{{^}}'value' is false{{$}}}}
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// tracking-note-re@-2{{{{^}}Taking false branch{{$}}}}
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return true;
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return coin(); // tracking-note-re{{{{^}}Returning value, which participates in a condition later{{$}}}}
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}
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void i(int *ptr) {
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if (ptr) // expected-note-re{{{{^}}Assuming 'ptr' is null{{$}}}}
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// expected-note-re@-1{{{{^}}Taking false branch{{$}}}}
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;
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if (!flipCoin())
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// tracking-note-re@-1{{{{^}}Calling 'flipCoin'{{$}}}}
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// tracking-note-re@-2{{{{^}}Returning from 'flipCoin'{{$}}}}
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// debug-note-re@-3{{{{^}}Tracking condition '!flipCoin()'{{$}}}}
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// expected-note-re@-4{{{{^}}Assuming the condition is true{{$}}}}
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// expected-note-re@-5{{{{^}}Taking true branch{{$}}}}
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*ptr = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace important_returning_value_note_in_linear_function
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namespace tracked_condition_is_only_initialized {
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int getInt();
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void f() {
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int flag = getInt();
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace tracked_condition_is_only_initialized
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namespace tracked_condition_written_in_same_stackframe {
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int flag;
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int getInt();
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void f(int y) {
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y = 1;
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flag = y;
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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if (flag) // expected-note-re{{{{^}}'flag' is 1{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace tracked_condition_written_in_same_stackframe
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namespace tracked_condition_written_in_nested_stackframe {
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int flag;
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int getInt();
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void foo() {
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int y;
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y = 1;
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flag = y; // tracking-note-re{{{{^}}The value 1 is assigned to 'flag', which participates in a condition later{{$}}}}
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}
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void f(int y) {
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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foo(); // tracking-note-re{{{{^}}Calling 'foo'{{$}}}}
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// tracking-note-re@-1{{{{^}}Returning from 'foo'{{$}}}}
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if (flag) // expected-note-re{{{{^}}'flag' is 1{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace tracked_condition_written_in_nested_stackframe
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namespace condition_written_in_nested_stackframe_before_assignment {
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int flag = 0;
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int getInt();
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void foo() {
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flag = getInt(); // tracking-note-re{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
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}
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void f() {
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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int y = 0;
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foo(); // tracking-note-re{{{{^}}Calling 'foo'{{$}}}}
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// tracking-note-re@-1{{{{^}}Returning from 'foo'{{$}}}}
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y = flag;
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if (y) // expected-note-re{{{{^}}Assuming 'y' is not equal to 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'y'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace condition_written_in_nested_stackframe_before_assignment
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namespace dont_explain_foreach_loops {
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struct Iterator {
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int *pos;
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bool operator!=(Iterator other) const {
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return pos && other.pos && pos != other.pos;
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}
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int operator*();
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Iterator operator++();
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};
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struct Container {
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Iterator begin();
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Iterator end();
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};
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void f(Container Cont) {
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int flag = 0;
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int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
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for (int i : Cont)
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if (i) // expected-note-re {{{{^}}Assuming 'i' is not equal to 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'i'{{$}}}}
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flag = i;
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if (flag) // expected-note-re{{{{^}}'flag' is not equal to 0{{$}}}}
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// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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} // end of namespace dont_explain_foreach_loops
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namespace condition_lambda_capture_by_reference_last_write {
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int getInt();
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[[noreturn]] void halt();
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void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
auto lambda = [&flag]() {
|
|
flag = getInt(); // tracking-note-re{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
|
|
};
|
|
|
|
lambda(); // tracking-note-re{{{{^}}Calling 'operator()'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'operator()'{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
} // end of namespace condition_lambda_capture_by_reference_last_write
|
|
|
|
namespace condition_lambda_capture_by_value_assumption {
|
|
int getInt();
|
|
|
|
[[noreturn]] void halt();
|
|
|
|
void bar(int &flag) {
|
|
flag = getInt(); // tracking-note-re{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
auto lambda = [flag]() {
|
|
if (!flag) // tracking-note-re{{{{^}}Assuming 'flag' is not equal to 0, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Taking false branch{{$}}}}
|
|
halt();
|
|
};
|
|
|
|
bar(flag); // tracking-note-re{{{{^}}Calling 'bar'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'bar'{{$}}}}
|
|
lambda(); // tracking-note-re{{{{^}}Calling 'operator()'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'operator()'{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
} // end of namespace condition_lambda_capture_by_value_assumption
|
|
|
|
namespace condition_lambda_capture_by_reference_assumption {
|
|
int getInt();
|
|
|
|
[[noreturn]] void halt();
|
|
|
|
void bar(int &flag) {
|
|
flag = getInt(); // tracking-note-re{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
auto lambda = [&flag]() {
|
|
if (!flag) // tracking-note-re{{{{^}}Assuming 'flag' is not equal to 0, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Taking false branch{{$}}}}
|
|
halt();
|
|
};
|
|
|
|
bar(flag); // tracking-note-re{{{{^}}Calling 'bar'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'bar'{{$}}}}
|
|
lambda(); // tracking-note-re{{{{^}}Calling 'operator()'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'operator()'{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
} // end of namespace condition_lambda_capture_by_reference_assumption
|
|
|
|
namespace collapse_point_not_in_condition_bool {
|
|
|
|
[[noreturn]] void halt();
|
|
|
|
void check(bool b) {
|
|
if (!b) // tracking-note-re{{{{^}}Assuming 'b' is true, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Taking false branch{{$}}}}
|
|
halt();
|
|
}
|
|
|
|
void f(bool flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
check(flag); // tracking-note-re{{{{^}}Calling 'check'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'check'{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}'flag' is true{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
} // end of namespace collapse_point_not_in_condition_bool
|
|
|
|
namespace collapse_point_not_in_condition {
|
|
|
|
[[noreturn]] void halt();
|
|
|
|
void assert(int b) {
|
|
if (!b) // tracking-note-re{{{{^}}Assuming 'b' is not equal to 0, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Taking false branch{{$}}}}
|
|
halt();
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
assert(flag); // tracking-note-re{{{{^}}Calling 'assert'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'assert'{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
} // end of namespace collapse_point_not_in_condition
|
|
|
|
namespace unimportant_write_before_collapse_point {
|
|
|
|
[[noreturn]] void halt();
|
|
|
|
void assert(int b) {
|
|
if (!b) // tracking-note-re{{{{^}}Assuming 'b' is not equal to 0, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Taking false branch{{$}}}}
|
|
halt();
|
|
}
|
|
int getInt();
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
flag = getInt();
|
|
assert(flag); // tracking-note-re{{{{^}}Calling 'assert'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'assert'{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
} // end of namespace unimportant_write_before_collapse_point
|
|
|
|
namespace dont_crash_on_nonlogical_binary_operator {
|
|
|
|
void f6(int x) {
|
|
int a[20];
|
|
if (x == 25) {} // expected-note{{Assuming 'x' is equal to 25}}
|
|
// expected-note@-1{{Taking true branch}}
|
|
if (a[x] == 123) {} // expected-warning{{The left operand of '==' is a garbage value due to array index out of bounds}}
|
|
// expected-note@-1{{The left operand of '==' is a garbage value due to array index out of bounds}}
|
|
}
|
|
|
|
} // end of namespace dont_crash_on_nonlogical_binary_operator
|
|
|
|
namespace collapse_point_not_in_condition_binary_op {
|
|
|
|
[[noreturn]] void halt();
|
|
|
|
void check(int b) {
|
|
if (b == 1) // tracking-note-re{{{{^}}Assuming 'b' is not equal to 1, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Taking false branch{{$}}}}
|
|
halt();
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
check(flag); // tracking-note-re{{{{^}}Calling 'check'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'check'{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
} // end of namespace collapse_point_not_in_condition_binary_op
|
|
|
|
namespace collapse_point_not_in_condition_as_field {
|
|
|
|
[[noreturn]] void halt();
|
|
struct IntWrapper {
|
|
int b;
|
|
IntWrapper();
|
|
|
|
void check() {
|
|
if (!b) // tracking-note-re{{{{^}}Assuming field 'b' is not equal to 0, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Taking false branch{{$}}}}
|
|
halt();
|
|
return;
|
|
}
|
|
};
|
|
|
|
void f(IntWrapper i) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
i.check(); // tracking-note-re{{{{^}}Calling 'IntWrapper::check'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'IntWrapper::check'{{$}}}}
|
|
if (i.b) // expected-note-re{{{{^}}Field 'b' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'i.b'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
} // end of namespace collapse_point_not_in_condition_as_field
|
|
|
|
namespace assignemnt_in_condition_in_nested_stackframe {
|
|
int flag;
|
|
|
|
bool coin();
|
|
|
|
[[noreturn]] void halt();
|
|
|
|
void foo() {
|
|
if ((flag = coin()))
|
|
// tracking-note-re@-1{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-2{{{{^}}Assuming 'flag' is not equal to 0, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-3{{{{^}}Taking true branch{{$}}}}
|
|
return;
|
|
halt();
|
|
return;
|
|
}
|
|
|
|
void f() {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
foo(); // tracking-note-re{{{{^}}Calling 'foo'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'foo'{{$}}}}
|
|
if (flag) // expected-note-re{{{{^}}'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
} // end of namespace assignemnt_in_condition_in_nested_stackframe
|
|
|
|
namespace condition_variable_less {
|
|
int flag;
|
|
|
|
bool coin();
|
|
|
|
[[noreturn]] void halt();
|
|
|
|
void foo() {
|
|
if (flag > 0)
|
|
// tracking-note-re@-1{{{{^}}Assuming 'flag' is > 0, which participates in a condition later{{$}}}}
|
|
// tracking-note-re@-2{{{{^}}Taking true branch{{$}}}}
|
|
return;
|
|
halt();
|
|
return;
|
|
}
|
|
|
|
void f() {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
foo(); // tracking-note-re{{{{^}}Calling 'foo'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'foo'{{$}}}}
|
|
if (flag) // expected-note-re{{{{^}}'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
} // end of namespace condition_variable_less
|
|
|
|
namespace dont_track_assertlike_conditions {
|
|
|
|
extern void __assert_fail(__const char *__assertion, __const char *__file,
|
|
unsigned int __line, __const char *__function)
|
|
__attribute__((__noreturn__));
|
|
#define assert(expr) \
|
|
((expr) ? (void)(0) : __assert_fail(#expr, __FILE__, __LINE__, __func__))
|
|
|
|
int getInt();
|
|
|
|
int cond1;
|
|
|
|
void bar() {
|
|
cond1 = getInt();
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
flag = getInt();
|
|
|
|
bar();
|
|
assert(cond1); // expected-note-re{{{{^}}Assuming 'cond1' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}'?' condition is true{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
#undef assert
|
|
} // end of namespace dont_track_assertlike_conditions
|
|
|
|
namespace dont_track_assertlike_and_conditions {
|
|
|
|
extern void __assert_fail(__const char *__assertion, __const char *__file,
|
|
unsigned int __line, __const char *__function)
|
|
__attribute__((__noreturn__));
|
|
#define assert(expr) \
|
|
((expr) ? (void)(0) : __assert_fail(#expr, __FILE__, __LINE__, __func__))
|
|
|
|
int getInt();
|
|
|
|
int cond1;
|
|
int cond2;
|
|
|
|
void bar() {
|
|
cond1 = getInt();
|
|
cond2 = getInt();
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
flag = getInt();
|
|
|
|
bar();
|
|
assert(cond1 && cond2);
|
|
// expected-note-re@-1{{{{^}}Assuming 'cond1' is not equal to 0{{$}}}}
|
|
// expected-note-re@-2{{{{^}}Assuming 'cond2' is not equal to 0{{$}}}}
|
|
// expected-note-re@-3{{{{^}}'?' condition is true{{$}}}}
|
|
// expected-note-re@-4{{{{^}}Left side of '&&' is true{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
#undef assert
|
|
} // end of namespace dont_track_assertlike_and_conditions
|
|
|
|
namespace dont_track_assertlike_or_conditions {
|
|
|
|
extern void __assert_fail(__const char *__assertion, __const char *__file,
|
|
unsigned int __line, __const char *__function)
|
|
__attribute__((__noreturn__));
|
|
#define assert(expr) \
|
|
((expr) ? (void)(0) : __assert_fail(#expr, __FILE__, __LINE__, __func__))
|
|
|
|
int getInt();
|
|
|
|
int cond1;
|
|
int cond2;
|
|
|
|
void bar() {
|
|
cond1 = getInt();
|
|
cond2 = getInt();
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
flag = getInt();
|
|
|
|
bar();
|
|
assert(cond1 || cond2);
|
|
// expected-note-re@-1{{{{^}}Assuming 'cond1' is not equal to 0{{$}}}}
|
|
// expected-note-re@-2{{{{^}}Left side of '||' is true{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
#undef assert
|
|
} // end of namespace dont_track_assertlike_or_conditions
|
|
|
|
namespace dont_track_assert2like_conditions {
|
|
|
|
extern void __assert_fail(__const char *__assertion, __const char *__file,
|
|
unsigned int __line, __const char *__function)
|
|
__attribute__((__noreturn__));
|
|
#define assert(expr) \
|
|
do { \
|
|
if (!(expr)) \
|
|
__assert_fail(#expr, __FILE__, __LINE__, __func__); \
|
|
} while (0)
|
|
|
|
int getInt();
|
|
|
|
int cond1;
|
|
|
|
void bar() {
|
|
cond1 = getInt();
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
flag = getInt();
|
|
|
|
bar();
|
|
assert(cond1); // expected-note-re{{{{^}}Assuming 'cond1' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking false branch{{$}}}}
|
|
// expected-note-re@-2{{{{^}}Loop condition is false. Exiting loop{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
#undef assert
|
|
} // end of namespace dont_track_assert2like_conditions
|
|
|
|
namespace dont_track_assert2like_and_conditions {
|
|
|
|
extern void __assert_fail(__const char *__assertion, __const char *__file,
|
|
unsigned int __line, __const char *__function)
|
|
__attribute__((__noreturn__));
|
|
#define assert(expr) \
|
|
do { \
|
|
if (!(expr)) \
|
|
__assert_fail(#expr, __FILE__, __LINE__, __func__); \
|
|
} while (0)
|
|
|
|
int getInt();
|
|
|
|
int cond1;
|
|
int cond2;
|
|
|
|
void bar() {
|
|
cond1 = getInt();
|
|
cond2 = getInt();
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
flag = getInt();
|
|
|
|
bar();
|
|
assert(cond1 && cond2);
|
|
// expected-note-re@-1{{{{^}}Assuming 'cond1' is not equal to 0{{$}}}}
|
|
// expected-note-re@-2{{{{^}}Left side of '&&' is true{{$}}}}
|
|
// expected-note-re@-3{{{{^}}Assuming the condition is false{{$}}}}
|
|
// expected-note-re@-4{{{{^}}Taking false branch{{$}}}}
|
|
// expected-note-re@-5{{{{^}}Loop condition is false. Exiting loop{{$}}}}
|
|
|
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if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
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|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
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|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
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*x = 5; // expected-warning{{Dereference of null pointer}}
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|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
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|
|
|
#undef assert
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|
} // end of namespace dont_track_assert2like_and_conditions
|
|
|
|
namespace dont_track_assert2like_or_conditions {
|
|
|
|
extern void __assert_fail(__const char *__assertion, __const char *__file,
|
|
unsigned int __line, __const char *__function)
|
|
__attribute__((__noreturn__));
|
|
#define assert(expr) \
|
|
do { \
|
|
if (!(expr)) \
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|
__assert_fail(#expr, __FILE__, __LINE__, __func__); \
|
|
} while (0)
|
|
|
|
int getInt();
|
|
|
|
int cond1;
|
|
int cond2;
|
|
|
|
void bar() {
|
|
cond1 = getInt();
|
|
cond2 = getInt();
|
|
}
|
|
|
|
void f(int flag) {
|
|
int *x = 0; // expected-note-re{{{{^}}'x' initialized to a null pointer value{{$}}}}
|
|
|
|
flag = getInt();
|
|
|
|
bar();
|
|
assert(cond1 || cond2);
|
|
// expected-note-re@-1{{{{^}}Assuming 'cond1' is not equal to 0{{$}}}}
|
|
// expected-note-re@-2{{{{^}}Left side of '||' is true{{$}}}}
|
|
// expected-note-re@-3{{{{^}}Taking false branch{{$}}}}
|
|
// expected-note-re@-4{{{{^}}Loop condition is false. Exiting loop{{$}}}}
|
|
|
|
if (flag) // expected-note-re{{{{^}}Assuming 'flag' is not equal to 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Taking true branch{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
#undef assert
|
|
} // end of namespace dont_track_assert2like_or_conditions
|
|
|
|
namespace only_track_the_evaluated_condition {
|
|
|
|
bool coin();
|
|
|
|
void bar(int &flag) {
|
|
flag = coin(); // tracking-note-re{{{{^}}Value assigned to 'flag', which participates in a condition later{{$}}}}
|
|
}
|
|
|
|
void bar2(int &flag2) {
|
|
flag2 = coin();
|
|
}
|
|
|
|
void f(int *x) {
|
|
if (x) // expected-note-re{{{{^}}Assuming 'x' is null{{$}}}}
|
|
// debug-note-re@-1{{{{^}}Tracking condition 'x'{{$}}}}
|
|
// expected-note-re@-2{{{{^}}Taking false branch{{$}}}}
|
|
return;
|
|
|
|
int flag, flag2;
|
|
bar(flag); // tracking-note-re{{{{^}}Calling 'bar'{{$}}}}
|
|
// tracking-note-re@-1{{{{^}}Returning from 'bar'{{$}}}}
|
|
bar2(flag2);
|
|
|
|
if (flag && flag2) // expected-note-re {{{{^}}Assuming 'flag' is 0{{$}}}}
|
|
// expected-note-re@-1{{{{^}}Left side of '&&' is false{{$}}}}
|
|
// debug-note-re@-2{{{{^}}Tracking condition 'flag'{{$}}}}
|
|
return;
|
|
|
|
*x = 5; // expected-warning{{Dereference of null pointer}}
|
|
// expected-note@-1{{Dereference of null pointer}}
|
|
}
|
|
|
|
} // end of namespace only_track_the_evaluated_condition
|