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// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -std=c++17 -verify %s
void clang_analyzer_eval(bool);
void array_init() {
int arr[] = {1, 2, 3, 4, 5};
auto [a, b, c, d, e] = arr;
clang_analyzer_eval(a == 1); // expected-warning{{TRUE}}
clang_analyzer_eval(b == 2); // expected-warning{{TRUE}}
clang_analyzer_eval(c == 3); // expected-warning{{TRUE}}
clang_analyzer_eval(d == 4); // expected-warning{{TRUE}}
clang_analyzer_eval(e == 5); // expected-warning{{TRUE}}
}
void array_uninit() {
int arr[5];
auto [a, b, c, d, e] = arr;
int x = e; // expected-warning{{Assigned value is garbage or undefined}}
}
void lambda_init() {
int arr[] = {1, 2, 3, 4, 5};
auto l = [arr] { return arr[0]; }();
clang_analyzer_eval(l == 1); // expected-warning{{TRUE}}
l = [arr] { return arr[1]; }();
clang_analyzer_eval(l == 2); // expected-warning{{TRUE}}
l = [arr] { return arr[2]; }();
clang_analyzer_eval(l == 3); // expected-warning{{TRUE}}
l = [arr] { return arr[3]; }();
clang_analyzer_eval(l == 4); // expected-warning{{TRUE}}
l = [arr] { return arr[4]; }();
clang_analyzer_eval(l == 5); // expected-warning{{TRUE}}
}
void lambda_uninit() {
int arr[5];
// FIXME: These should be Undefined, but we fail to read Undefined from a lazyCompoundVal
int l = [arr] { return arr[0]; }();
clang_analyzer_eval(l); // expected-warning{{UNKNOWN}}
l = [arr] { return arr[1]; }();
clang_analyzer_eval(l); // expected-warning{{UNKNOWN}}
l = [arr] { return arr[2]; }();
clang_analyzer_eval(l); // expected-warning{{UNKNOWN}}
l = [arr] { return arr[3]; }();
clang_analyzer_eval(l); // expected-warning{{UNKNOWN}}
l = [arr] { return arr[4]; }();
clang_analyzer_eval(l); // expected-warning{{UNKNOWN}}
}
struct S {
int arr[5];
};
void copy_ctor_init() {
S orig;
orig.arr[0] = 1;
orig.arr[1] = 2;
orig.arr[2] = 3;
orig.arr[3] = 4;
orig.arr[4] = 5;
S copy = orig;
clang_analyzer_eval(copy.arr[0] == 1); // expected-warning{{TRUE}}
clang_analyzer_eval(copy.arr[1] == 2); // expected-warning{{TRUE}}
clang_analyzer_eval(copy.arr[2] == 3); // expected-warning{{TRUE}}
clang_analyzer_eval(copy.arr[3] == 4); // expected-warning{{TRUE}}
clang_analyzer_eval(copy.arr[4] == 5); // expected-warning{{TRUE}}
}
void copy_ctor_uninit() {
S orig;
S copy = orig;
// FIXME: These should be Undefined, but we fail to read Undefined from a lazyCompoundVal.
// If the struct is not considered a small struct, instead of a copy, we store a lazy compound value.
// As the struct has an array data member, it is not considered small.
clang_analyzer_eval(copy.arr[0]); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(copy.arr[1]); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(copy.arr[2]); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(copy.arr[3]); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(copy.arr[4]); // expected-warning{{UNKNOWN}}
}
void move_ctor_init() {
S orig;
orig.arr[0] = 1;
orig.arr[1] = 2;
orig.arr[2] = 3;
orig.arr[3] = 4;
orig.arr[4] = 5;
S moved = (S &&) orig;
clang_analyzer_eval(moved.arr[0] == 1); // expected-warning{{TRUE}}
clang_analyzer_eval(moved.arr[1] == 2); // expected-warning{{TRUE}}
clang_analyzer_eval(moved.arr[2] == 3); // expected-warning{{TRUE}}
clang_analyzer_eval(moved.arr[3] == 4); // expected-warning{{TRUE}}
clang_analyzer_eval(moved.arr[4] == 5); // expected-warning{{TRUE}}
}
void move_ctor_uninit() {
S orig;
S moved = (S &&) orig;
// FIXME: These should be Undefined, but we fail to read Undefined from a lazyCompoundVal.
clang_analyzer_eval(moved.arr[0]); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(moved.arr[1]); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(moved.arr[2]); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(moved.arr[3]); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(moved.arr[4]); // expected-warning{{UNKNOWN}}
}
// The struct has a user defined copy and move ctor, which allow us to
// track the values more precisely when an array of this struct is being
// copy/move initialized by ArrayInitLoopExpr.
struct S2 {
inline static int c = 0;
int i;
S2() : i(++c) {}
S2(const S2 ©) {
i = copy.i + 1;
}
S2(S2 &&move) {
i = move.i + 2;
}
};
void array_init_non_pod() {
S2::c = 0;
S2 arr[4];
auto [a, b, c, d] = arr;
clang_analyzer_eval(a.i == 2); // expected-warning{{TRUE}}
clang_analyzer_eval(b.i == 3); // expected-warning{{TRUE}}
clang_analyzer_eval(c.i == 4); // expected-warning{{TRUE}}
clang_analyzer_eval(d.i == 5); // expected-warning{{TRUE}}
}
struct S3 {
int i;
};
// The duplicate is required to emit a warning at 2 different places.
struct S3_duplicate {
int i;
};
void array_uninit_non_pod() {
S3 arr[1];
auto [a] = arr; // expected-warning@159{{ in implicit constructor is garbage or undefined }}
}
void lambda_init_non_pod() {
S2::c = 0;
S2 arr[4];
auto l = [arr] { return arr[0].i; }();
clang_analyzer_eval(l == 2); // expected-warning{{TRUE}}
l = [arr] { return arr[1].i; }();
clang_analyzer_eval(l == 3); // expected-warning{{TRUE}}
l = [arr] { return arr[2].i; }();
clang_analyzer_eval(l == 4); // expected-warning{{TRUE}}
l = [arr] { return arr[3].i; }();
clang_analyzer_eval(l == 5); // expected-warning{{TRUE}}
}
void lambda_uninit_non_pod() {
S3_duplicate arr[4];
int l = [arr] { return arr[3].i; }(); // expected-warning@164{{ in implicit constructor is garbage or undefined }}
}
// If this struct is being copy/move constructed by the implicit ctors, ArrayInitLoopExpr
// is responsible for the initialization of 'arr' by copy/move constructing each of the
// elements.
struct S5 {
S2 arr[4];
};
void copy_ctor_init_non_pod() {
S2::c = 0;
S5 orig;
S5 copy = orig;
clang_analyzer_eval(copy.arr[0].i == 2); // expected-warning{{TRUE}}
clang_analyzer_eval(copy.arr[1].i == 3); // expected-warning{{TRUE}}
clang_analyzer_eval(copy.arr[2].i == 4); // expected-warning{{TRUE}}
clang_analyzer_eval(copy.arr[3].i == 5); // expected-warning{{TRUE}}
}
void move_ctor_init_non_pod() {
S2::c = 0;
S5 orig;
S5 moved = (S5 &&) orig;
clang_analyzer_eval(moved.arr[0].i == 3); // expected-warning{{TRUE}}
clang_analyzer_eval(moved.arr[1].i == 4); // expected-warning{{TRUE}}
clang_analyzer_eval(moved.arr[2].i == 5); // expected-warning{{TRUE}}
clang_analyzer_eval(moved.arr[3].i == 6); // expected-warning{{TRUE}}
}
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