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-rw-r--r--test/asan/TestCases/Darwin/scribble.cc58
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);
+}