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// RUN: %clang_analyze_cc1 %s \
// RUN: -verify=expected,tracking \
// RUN: -analyzer-config track-conditions=true \
// RUN: -analyzer-output=text \
// RUN: -analyzer-checker=core
// RUN: not %clang_analyze_cc1 -verify %s \
// RUN: -analyzer-checker=core \
// RUN: -analyzer-config track-conditions-debug=true \
// RUN: 2>&1 | FileCheck %s -check-prefix=CHECK-INVALID-DEBUG
// CHECK-INVALID-DEBUG: (frontend): invalid input for analyzer-config option
// CHECK-INVALID-DEBUG-SAME: 'track-conditions-debug', that expects
// CHECK-INVALID-DEBUG-SAME: 'track-conditions' to also be enabled
//
// RUN: %clang_analyze_cc1 %s \
// RUN: -verify=expected,tracking,debug \
// RUN: -analyzer-config track-conditions=true \
// RUN: -analyzer-config track-conditions-debug=true \
// RUN: -analyzer-output=text \
// RUN: -analyzer-checker=core
// RUN: %clang_analyze_cc1 %s -verify \
// RUN: -analyzer-output=text \
// RUN: -analyzer-checker=core
namespace example_1 {
int flag;
bool coin();
void foo() {
flag = coin(); // tracking-note{{Value assigned to 'flag'}}
}
void test() {
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
flag = 1;
foo(); // TODO: Add nodes here about flag's value being invalidated.
if (flag) // expected-note {{Assuming 'flag' is 0}}
// expected-note@-1{{Taking false branch}}
x = new int;
foo(); // tracking-note{{Calling 'foo'}}
// tracking-note@-1{{Returning from 'foo'}}
if (flag) // expected-note {{Assuming 'flag' is not equal to 0}}
// expected-note@-1{{Taking true branch}}
// debug-note@-2{{Tracking condition 'flag'}}
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace example_1
namespace example_2 {
int flag;
bool coin();
void foo() {
flag = coin(); // tracking-note{{Value assigned to 'flag'}}
}
void test() {
int *x = 0;
flag = 1;
foo();
if (flag) // expected-note {{Assuming 'flag' is 0}}
// expected-note@-1{{Taking false branch}}
x = new int;
x = 0; // expected-note{{Null pointer value stored to 'x'}}
foo(); // tracking-note{{Calling 'foo'}}
// tracking-note@-1{{Returning from 'foo'}}
if (flag) // expected-note {{Assuming 'flag' is not equal to 0}}
// expected-note@-1{{Taking true branch}}
// debug-note@-2{{Tracking condition 'flag'}}
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace example_2
namespace global_variable_invalidation {
int flag;
bool coin();
void foo() {
// coin() could write bar, do it's invalidated.
flag = coin(); // tracking-note{{Value assigned to 'flag'}}
// tracking-note@-1{{Value assigned to 'bar'}}
}
int bar;
void test() {
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
flag = 1;
foo(); // tracking-note{{Calling 'foo'}}
// tracking-note@-1{{Returning from 'foo'}}
if (bar) // expected-note {{Assuming 'bar' is not equal to 0}}
// expected-note@-1{{Taking true branch}}
// debug-note@-2{{Tracking condition 'bar'}}
if (flag) // expected-note {{Assuming 'flag' is not equal to 0}}
// expected-note@-1{{Taking true branch}}
// debug-note@-2{{Tracking condition 'flag'}}
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace global_variable_invalidation
namespace variable_declaration_in_condition {
bool coin();
bool foo() {
return coin(); // tracking-note{{Returning value}}
}
int bar;
void test() {
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
if (int flag = foo()) // tracking-note{{Calling 'foo'}}
// tracking-note@-1{{Returning from 'foo'}}
// tracking-note@-2{{'flag' initialized here}}
// debug-note@-3{{Tracking condition 'flag'}}
// expected-note@-4{{Assuming 'flag' is not equal to 0}}
// expected-note@-5{{Taking true branch}}
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace variable_declaration_in_condition
namespace conversion_to_bool {
bool coin();
struct ConvertsToBool {
operator bool() const { return coin(); } // tracking-note{{Returning value}}
};
void test() {
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
if (ConvertsToBool())
// tracking-note@-1 {{Calling 'ConvertsToBool::operator bool'}}
// tracking-note@-2{{Returning from 'ConvertsToBool::operator bool'}}
// debug-note@-3{{Tracking condition 'ConvertsToBool()'}}
// expected-note@-4{{Assuming the condition is true}}
// expected-note@-5{{Taking true branch}}
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace variable_declaration_in_condition
namespace unimportant_returning_value_note {
bool coin();
bool flipCoin() { return coin(); } // tracking-note{{Returning value}}
void i(int *ptr) {
if (ptr) // expected-note{{Assuming 'ptr' is null}}
// expected-note@-1{{Taking false branch}}
;
if (!flipCoin())
// tracking-note@-1{{Calling 'flipCoin'}}
// tracking-note@-2{{Returning from 'flipCoin'}}
// debug-note@-3{{Tracking condition '!flipCoin()'}}
// expected-note@-4{{Assuming the condition is true}}
// expected-note@-5{{Taking true branch}}
*ptr = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace unimportant_returning_value_note
namespace important_returning_value_note {
bool coin();
bool flipCoin() {
if (coin()) // tracking-note{{Assuming the condition is false}}
// tracking-note@-1{{Taking false branch}}
// debug-note@-2{{Tracking condition 'coin()'}}
return true;
return coin(); // tracking-note{{Returning value}}
}
void i(int *ptr) {
if (ptr) // expected-note{{Assuming 'ptr' is null}}
// expected-note@-1{{Taking false branch}}
;
if (!flipCoin())
// tracking-note@-1{{Calling 'flipCoin'}}
// tracking-note@-2{{Returning from 'flipCoin'}}
// debug-note@-3{{Tracking condition '!flipCoin()'}}
// expected-note@-4{{Assuming the condition is true}}
// expected-note@-5{{Taking true branch}}
*ptr = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace important_returning_value_note
namespace tracked_condition_is_only_initialized {
int getInt();
void f() {
int flag = getInt(); // tracking-note{{'flag' initialized here}}
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
if (flag) // expected-note{{Assuming 'flag' is not equal to 0}}
// expected-note@-1{{Taking true branch}}
// debug-note@-2{{Tracking condition 'flag'}}
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace tracked_condition_is_only_initialized
namespace tracked_condition_written_in_same_stackframe {
int flag;
int getInt();
void f(int y) {
y = 1; // tracking-note{{The value 1 is assigned to 'y'}}
flag = y; // tracking-note{{The value 1 is assigned to 'flag'}}
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
if (flag) // expected-note{{'flag' is 1}}
// expected-note@-1{{Taking true branch}}
// debug-note@-2{{Tracking condition 'flag'}}
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace tracked_condition_written_in_same_stackframe
namespace tracked_condition_written_in_nested_stackframe {
int flag;
int getInt();
void foo() {
int y;
y = 1; // tracking-note{{The value 1 is assigned to 'y'}}
flag = y; // tracking-note{{The value 1 is assigned to 'flag'}}
}
void f(int y) {
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
foo(); // tracking-note{{Calling 'foo'}}
// tracking-note@-1{{Returning from 'foo'}}
if (flag) // expected-note{{'flag' is 1}}
// expected-note@-1{{Taking true branch}}
// debug-note@-2{{Tracking condition 'flag'}}
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace tracked_condition_written_in_nested_stackframe
namespace collapse_point_not_in_condition {
[[noreturn]] void halt();
void assert(int b) {
if (!b) // tracking-note{{Assuming 'b' is not equal to 0}}
// tracking-note@-1{{Taking false branch}}
halt();
}
void f(int flag) {
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
assert(flag); // tracking-note{{Calling 'assert'}}
// tracking-note@-1{{Returning from 'assert'}}
if (flag) // expected-note{{'flag' is not equal to 0}}
// expected-note@-1{{Taking true branch}}
// debug-note@-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{{Assuming 'b' is not equal to 0}}
// tracking-note@-1{{Taking false branch}}
halt();
}
int getInt();
void f(int flag) {
int *x = 0; // expected-note{{'x' initialized to a null pointer value}}
flag = getInt(); // tracking-note{{Value assigned to 'flag'}}
assert(flag); // tracking-note{{Calling 'assert'}}
// tracking-note@-1{{Returning from 'assert'}}
if (flag) // expected-note{{'flag' is not equal to 0}}
// expected-note@-1{{Taking true branch}}
// debug-note@-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
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