| // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-store=region -fblocks -verify %s |
| |
| int* f1() { |
| int x = 0; |
| return &x; // expected-warning{{Address of stack memory associated with local variable 'x' returned}} expected-warning{{address of stack memory associated with local variable 'x' returned}} |
| } |
| |
| int* f2(int y) { |
| return &y; // expected-warning{{Address of stack memory associated with local variable 'y' returned}} expected-warning{{address of stack memory associated with local variable 'y' returned}} |
| } |
| |
| int* f3(int x, int *y) { |
| int w = 0; |
| |
| if (x) |
| y = &w; |
| |
| return y; // expected-warning{{Address of stack memory associated with local variable 'w' returned to caller}} |
| } |
| |
| void* compound_literal(int x, int y) { |
| if (x) |
| return &(unsigned short){((unsigned short)0x22EF)}; // expected-warning{{Address of stack memory}} |
| |
| int* array[] = {}; |
| struct s { int z; double y; int w; }; |
| |
| if (y) |
| return &((struct s){ 2, 0.4, 5 * 8 }); // expected-warning{{Address of stack memory}} |
| |
| |
| void* p = &((struct s){ 42, 0.4, x ? 42 : 0 }); |
| return p; // expected-warning{{Address of stack memory}} |
| } |
| |
| void* alloca_test() { |
| void* p = __builtin_alloca(10); |
| return p; // expected-warning{{Address of stack memory}} |
| } |
| |
| int array_test(int x[2]) { |
| return x[0]; // no-warning |
| } |
| |
| struct baz { |
| int x; |
| int y[2]; |
| }; |
| |
| int struct_test(struct baz byVal, int flag) { |
| if (flag) |
| return byVal.x; // no-warning |
| else { |
| return byVal.y[0]; // no-warning |
| } |
| } |
| |
| typedef int (^ComparatorBlock)(int a, int b); |
| ComparatorBlock test_return_block(void) { |
| // This block is a global since it has no captures. |
| ComparatorBlock b = ^int(int a, int b){ return a > b; }; |
| return b; // no-warning |
| } |
| |
| ComparatorBlock test_return_block_with_capture(int x) { |
| // This block is stack allocated because it has captures. |
| ComparatorBlock b = ^int(int a, int b){ return a > b + x; }; |
| return b; // expected-warning{{Address of stack-allocated block}} |
| } |
| |
| ComparatorBlock test_return_block_neg_aux(void); |
| ComparatorBlock test_return_block_neg(void) { |
| ComparatorBlock b = test_return_block_neg_aux(); |
| return b; // no-warning |
| } |
| |
| // <rdar://problem/7523821> |
| int *rdar_7523821_f2() { |
| int a[3]; |
| return a; // expected-warning 2 {{ddress of stack memory associated with local variable 'a' returned}} |
| }; |
| |
| // Handle blocks that have no captures or are otherwise declared 'static'. |
| // <rdar://problem/10348049> |
| typedef int (^RDar10348049)(int value); |
| RDar10348049 test_rdar10348049(void) { |
| static RDar10348049 b = ^int(int x) { |
| return x + 2; |
| }; |
| return b; // no-warning |
| } |
| |
| void testRegister(register const char *reg) { |
| if (reg) (void)reg[0]; |
| } |
| void callTestRegister() { |
| char buf[20]; |
| testRegister(buf); // no-warning |
| } |