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59 lines
1.6 KiB
59 lines
1.6 KiB
4 months ago
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// RUN: %clang_asan -O2 %s -o %t
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// RUN: %run %t 2>&1 | FileCheck --check-prefix=CHECK-NOSCRIBBLE %s
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// RUN: %env MallocScribble=1 MallocPreScribble=1 %run %t 2>&1 | FileCheck --check-prefix=CHECK-SCRIBBLE %s
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// RUN: %env_asan_opts=max_free_fill_size=4096 %run %t 2>&1 | FileCheck --check-prefix=CHECK-SCRIBBLE %s
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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struct Isa {
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const char *class_name;
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};
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struct MyClass {
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long padding;
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Isa *isa;
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long data;
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void print_my_class_name();
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};
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__attribute__((no_sanitize("address")))
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void MyClass::print_my_class_name() {
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fprintf(stderr, "this = %p\n", this);
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fprintf(stderr, "padding = 0x%lx\n", this->padding);
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fprintf(stderr, "isa = %p\n", this->isa);
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if ((uint32_t)(uintptr_t)this->isa != 0x55555555) {
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fprintf(stderr, "class name: %s\n", this->isa->class_name);
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}
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}
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int main() {
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Isa *my_class_isa = (Isa *)malloc(sizeof(Isa));
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memset(my_class_isa, 0x77, sizeof(Isa));
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my_class_isa->class_name = "MyClass";
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MyClass *my_object = (MyClass *)malloc(sizeof(MyClass));
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memset(my_object, 0x88, sizeof(MyClass));
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my_object->isa = my_class_isa;
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my_object->data = 42;
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my_object->print_my_class_name();
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// CHECK-SCRIBBLE: class name: MyClass
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// CHECK-NOSCRIBBLE: class name: MyClass
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free(my_object);
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my_object->print_my_class_name();
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// CHECK-NOSCRIBBLE: class name: MyClass
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// CHECK-SCRIBBLE: isa = {{(0x)?}}{{5555555555555555|55555555}}
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fprintf(stderr, "okthxbai!\n");
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// CHECK-SCRIBBLE: okthxbai!
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// CHECK-NOSCRIBBLE: okthxbai!
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free(my_class_isa);
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}
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