diff options
Diffstat (limited to 'test/asan/TestCases/Darwin/scribble.cc')
-rw-r--r-- | test/asan/TestCases/Darwin/scribble.cc | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/test/asan/TestCases/Darwin/scribble.cc b/test/asan/TestCases/Darwin/scribble.cc new file mode 100644 index 000000000000..0ddee6b5eef5 --- /dev/null +++ b/test/asan/TestCases/Darwin/scribble.cc @@ -0,0 +1,58 @@ +// RUN: %clang_asan -O2 %s -o %t +// RUN: %run %t 2>&1 | FileCheck --check-prefix=CHECK-NOSCRIBBLE %s +// RUN: env MallocScribble=1 MallocPreScribble=1 %run %t 2>&1 | FileCheck --check-prefix=CHECK-SCRIBBLE %s +// RUN: %env_asan_opts=max_free_fill_size=4096 %run %t 2>&1 | FileCheck --check-prefix=CHECK-SCRIBBLE %s + +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +struct Isa { + const char *class_name; +}; + +struct MyClass { + long padding; + Isa *isa; + long data; + + void print_my_class_name(); +}; + +__attribute__((no_sanitize("address"))) +void MyClass::print_my_class_name() { + fprintf(stderr, "this = %p\n", this); + fprintf(stderr, "padding = 0x%lx\n", this->padding); + fprintf(stderr, "isa = %p\n", this->isa); + + if ((uint32_t)(uintptr_t)this->isa != 0x55555555) { + fprintf(stderr, "class name: %s\n", this->isa->class_name); + } +} + +int main() { + Isa *my_class_isa = (Isa *)malloc(sizeof(Isa)); + memset(my_class_isa, 0x77, sizeof(Isa)); + my_class_isa->class_name = "MyClass"; + + MyClass *my_object = (MyClass *)malloc(sizeof(MyClass)); + memset(my_object, 0x88, sizeof(MyClass)); + my_object->isa = my_class_isa; + my_object->data = 42; + + my_object->print_my_class_name(); + // CHECK-SCRIBBLE: class name: MyClass + // CHECK-NOSCRIBBLE: class name: MyClass + + free(my_object); + + my_object->print_my_class_name(); + // CHECK-NOSCRIBBLE: class name: MyClass + // CHECK-SCRIBBLE: isa = {{(0x)?}}{{5555555555555555|55555555}} + + fprintf(stderr, "okthxbai!\n"); + // CHECK-SCRIBBLE: okthxbai! + // CHECK-NOSCRIBBLE: okthxbai! + free(my_class_isa); +} |