forked from OSchip/llvm-project
89 lines
3.6 KiB
C
89 lines
3.6 KiB
C
// RUN: %clang_analyze_cc1 %s -analyzer-checker=core.NullDereference,core.DivideZero -fblocks -analyzer-output=text -analyzer-config suppress-null-return-paths=false -verify -analyzer-config eagerly-assume=false %s
|
|
// RUN: %clang_analyze_cc1 -analyzer-config eagerly-assume=false %s -analyzer-checker=core.NullDereference,core.DivideZero -fblocks -analyzer-output=plist -analyzer-config suppress-null-return-paths=false -o %t
|
|
// RUN: cat %t | %diff_plist %S/Inputs/expected-plists/inline-plist.c.plist
|
|
|
|
// <rdar://problem/10967815>
|
|
void mmm(int y) {
|
|
if (y != 0)
|
|
y++;
|
|
}
|
|
|
|
int foo(int x, int y) {
|
|
mmm(y);
|
|
if (x != 0) {
|
|
// expected-note@-1 {{Assuming 'x' is equal to 0}}
|
|
// expected-note@-2 {{Taking false branch}}
|
|
x++;
|
|
}
|
|
return 5/x; // expected-warning{{Division by zero}} expected-note{{Division by zero}}
|
|
}
|
|
|
|
// Test a bug triggering only when inlined.
|
|
void has_bug(int *p) {
|
|
*p = 0xDEADBEEF; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}}
|
|
}
|
|
|
|
void test_has_bug() {
|
|
has_bug(0);
|
|
// expected-note@-1 {{Passing null pointer value via 1st parameter 'p'}}
|
|
// expected-note@-2 {{Calling 'has_bug'}}
|
|
}
|
|
|
|
void triggers_bug(int *p) {
|
|
*p = 0xDEADBEEF; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}}
|
|
}
|
|
|
|
// This function triggers a bug by calling triggers_bug(). The diagnostics
|
|
// should show when p is assumed to be null.
|
|
void bar(int *p) {
|
|
if (!!p) {
|
|
// expected-note@-1 {{Assuming 'p' is null}}
|
|
// expected-note@-2 {{Taking false branch}}
|
|
return;
|
|
}
|
|
|
|
if (p == 0) {
|
|
// expected-note@-1 {{Taking true branch}}
|
|
triggers_bug(p);
|
|
// expected-note@-1 {{Passing null pointer value via 1st parameter 'p'}}
|
|
// expected-note@-2 {{Calling 'triggers_bug'}}
|
|
}
|
|
}
|
|
|
|
// ========================================================================== //
|
|
// Test inlining of blocks.
|
|
// ========================================================================== //
|
|
|
|
void test_block__capture_null() {
|
|
int *p = 0; // expected-note{{'p' initialized to a null pointer value}}
|
|
^(){ // expected-note {{Calling anonymous block}}
|
|
*p = 1; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}}
|
|
}();
|
|
|
|
}
|
|
|
|
void test_block_ret() {
|
|
int *p = ^int*(){ // expected-note {{Calling anonymous block}} expected-note{{Returning to caller}} expected-note {{'p' initialized to a null pointer value}}
|
|
int *q = 0; // expected-note {{'q' initialized to a null pointer value}}
|
|
return q; // expected-note {{Returning null pointer (loaded from 'q')}}
|
|
}();
|
|
*p = 1; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}}
|
|
}
|
|
|
|
void test_block_blockvar() {
|
|
__block int *p;
|
|
^(){ // expected-note{{Calling anonymous block}} expected-note{{Returning to caller}}
|
|
p = 0; // expected-note{{Null pointer value stored to 'p'}}
|
|
}();
|
|
*p = 1; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}}
|
|
}
|
|
|
|
void test_block_arg() {
|
|
int *p;
|
|
^(int **q){ // expected-note{{Calling anonymous block}} expected-note{{Returning to caller}}
|
|
*q = 0; // expected-note{{Null pointer value stored to 'p'}}
|
|
}(&p);
|
|
*p = 1; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}}
|
|
}
|
|
|