--- /dev/null
+// Test how we produce the scariness score.
+
+// RUN: %clangxx_asan -O0 %s -o %t
+// On OSX and Windows, alloc_dealloc_mismatch=1 isn't 100% reliable, so it's
+// off by default. It's safe for these tests, though, so we turn it on.
+// RUN: export %env_asan_opts=detect_stack_use_after_return=1:handle_abort=1:print_scariness=1:alloc_dealloc_mismatch=1
+// Make sure the stack is limited (may not be the default under GNU make)
+// RUN: ulimit -s 4096
+// RUN: not %run %t 1 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: not %run %t 2 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: not %run %t 3 2>&1 | FileCheck %s --check-prefix=CHECK3
+// RUN: not %run %t 4 2>&1 | FileCheck %s --check-prefix=CHECK4
+// RUN: not %run %t 5 2>&1 | FileCheck %s --check-prefix=CHECK5
+// RUN: not %run %t 6 2>&1 | FileCheck %s --check-prefix=CHECK6
+// RUN: not %run %t 7 2>&1 | FileCheck %s --check-prefix=CHECK7
+// RUN: not %run %t 8 2>&1 | FileCheck %s --check-prefix=CHECK8
+// RUN: not %run %t 9 2>&1 | FileCheck %s --check-prefix=CHECK9
+// RUN: not %run %t 10 2>&1 | FileCheck %s --check-prefix=CHECK10
+// RUN: not %run %t 11 2>&1 | FileCheck %s --check-prefix=CHECK11
+// RUN: not %run %t 12 2>&1 | FileCheck %s --check-prefix=CHECK12
+// RUN: not %run %t 13 2>&1 | FileCheck %s --check-prefix=CHECK13
+// RUN: not %run %t 14 2>&1 | FileCheck %s --check-prefix=CHECK14
+// RUN: not %run %t 15 2>&1 | FileCheck %s --check-prefix=CHECK15
+// RUN: not %run %t 16 2>&1 | FileCheck %s --check-prefix=CHECK16
+// RUN: not %run %t 17 2>&1 | FileCheck %s --check-prefix=CHECK17
+// RUN: not %run %t 18 2>&1 | FileCheck %s --check-prefix=CHECK18
+// RUN: not %run %t 19 2>&1 | FileCheck %s --check-prefix=CHECK19
+// RUN: not %run %t 20 2>&1 | FileCheck %s --check-prefix=CHECK20
+// RUN: not %run %t 21 2>&1 | FileCheck %s --check-prefix=CHECK21
+// RUN: not %run %t 22 2>&1 | FileCheck %s --check-prefix=CHECK22
+// RUN: not %run %t 23 2>&1 | FileCheck %s --check-prefix=CHECK23
+// RUN: not %run %t 24 2>&1 | FileCheck %s --check-prefix=CHECK24
+// RUN: not %run %t 25 2>&1 | FileCheck %s --check-prefix=CHECK25
+// RUN: not %run %t 26 2>&1 | FileCheck %s --check-prefix=CHECK26
+// Parts of the test are too platform-specific:
+// REQUIRES: x86_64-target-arch
+// REQUIRES: shell
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <sanitizer/asan_interface.h>
+
+enum ReadOrWrite { Read = 0, Write = 1 };
+
+struct S32 {
+ char x[32];
+};
+
+template<class T>
+void HeapBuferOverflow(int Idx, ReadOrWrite w) {
+ T *t = new T[100];
+ static T sink;
+ if (w)
+ t[100 + Idx] = T();
+ else
+ sink = t[100 + Idx];
+ delete [] t;
+}
+
+template<class T>
+void HeapUseAfterFree(int Idx, ReadOrWrite w) {
+ T *t = new T[100];
+ static T sink;
+ sink = t[0];
+ delete [] t;
+ if (w)
+ t[Idx] = T();
+ else
+ sink = t[Idx];
+}
+
+template<class T>
+void StackBufferOverflow(int Idx, ReadOrWrite w) {
+ T t[100];
+ static T sink;
+ sink = t[Idx];
+ if (w)
+ t[100 + Idx] = T();
+ else
+ sink = t[100 + Idx];
+}
+
+template<class T>
+T *LeakStack() {
+ T t[100];
+ static volatile T *x;
+ x = &t[0];
+ return (T*)x;
+}
+
+template<class T>
+void StackUseAfterReturn(int Idx, ReadOrWrite w) {
+ static T sink;
+ T *t = LeakStack<T>();
+ if (w)
+ t[100 + Idx] = T();
+ else
+ sink = t[100 + Idx];
+}
+
+char g1[100];
+short g2[100];
+int g4[100];
+int64_t g8[100];
+S32 gm[100];
+
+void DoubleFree() {
+ int *x = new int;
+ static volatile int two = 2;
+ for (int i = 0; i < two; i++)
+ delete x;
+}
+
+void StackOverflow(int Idx) {
+ int some_stack[10000];
+ static volatile int *x;
+ x = &some_stack[0];
+ if (Idx > 0)
+ StackOverflow(Idx - 1);
+}
+
+void UseAfterPoison() {
+ int buf[100];
+ __asan_poison_memory_region(buf, sizeof(buf));
+ static volatile int sink;
+ sink = buf[42];
+}
+
+int main(int argc, char **argv) {
+ char arr[100];
+ static volatile int zero = 0;
+ static volatile int *zero_ptr = 0;
+ static volatile int *wild_addr = (int*)0x10000000; // System-dependent.
+ if (argc != 2) return 1;
+ int kind = atoi(argv[1]);
+ switch (kind) {
+ case 1: HeapBuferOverflow<char>(0, Read); break;
+ case 2: HeapBuferOverflow<int>(0, Read); break;
+ case 3: HeapBuferOverflow<short>(0, Write); break;
+ case 4: HeapBuferOverflow<int64_t>(2, Write); break;
+ case 5: HeapBuferOverflow<S32>(4, Write); break;
+ case 6: HeapUseAfterFree<char>(0, Read); break;
+ case 7: HeapUseAfterFree<int>(0, Write); break;
+ case 8: HeapUseAfterFree<int64_t>(0, Read); break;
+ case 9: HeapUseAfterFree<S32>(0, Write); break;
+ case 10: StackBufferOverflow<char>(0, Write); break;
+ case 11: StackBufferOverflow<int64_t>(0, Read); break;
+ case 12: StackBufferOverflow<int>(4, Write); break;
+ case 13: StackUseAfterReturn<char>(0, Read); break;
+ case 14: StackUseAfterReturn<S32>(0, Write); break;
+ case 15: g1[zero + 100] = 0; break;
+ case 16: gm[0] = gm[zero + 100 + 1]; break;
+ case 17: DoubleFree(); break;
+ case 18: StackOverflow(1000000); break;
+ case 19: *zero_ptr = 0; break;
+ case 20: *wild_addr = 0; break;
+ case 21: zero = *wild_addr; break;
+ case 22: ((void (*)(void))wild_addr)(); break;
+ case 23: delete (new int[10]); break;
+ case 24: free((char*)malloc(100) + 10); break;
+ case 25: memcpy(arr, arr+10, 20); break;
+ case 26: UseAfterPoison(); break;
+ // CHECK1: SCARINESS: 12 (1-byte-read-heap-buffer-overflow)
+ // CHECK2: SCARINESS: 17 (4-byte-read-heap-buffer-overflow)
+ // CHECK3: SCARINESS: 33 (2-byte-write-heap-buffer-overflow)
+ // CHECK4: SCARINESS: 52 (8-byte-write-heap-buffer-overflow-far-from-bounds)
+ // CHECK5: SCARINESS: 55 (multi-byte-write-heap-buffer-overflow-far-from-bounds)
+ // CHECK6: SCARINESS: 40 (1-byte-read-heap-use-after-free)
+ // CHECK7: SCARINESS: 46 (4-byte-write-heap-use-after-free)
+ // CHECK8: SCARINESS: 51 (8-byte-read-heap-use-after-free)
+ // CHECK9: SCARINESS: 55 (multi-byte-write-heap-use-after-free)
+ // CHECK10: SCARINESS: 46 (1-byte-write-stack-buffer-overflow)
+ // CHECK11: SCARINESS: 38 (8-byte-read-stack-buffer-overflow)
+ // CHECK12: SCARINESS: 61 (4-byte-write-stack-buffer-overflow-far-from-bounds)
+ // CHECK13: SCARINESS: 50 (1-byte-read-stack-use-after-return)
+ // CHECK14: SCARINESS: 65 (multi-byte-write-stack-use-after-return)
+ // CHECK15: SCARINESS: 31 (1-byte-write-global-buffer-overflow)
+ // CHECK16: SCARINESS: 36 (multi-byte-read-global-buffer-overflow-far-from-bounds)
+ // CHECK17: SCARINESS: 42 (double-free)
+ // CHECK18: SCARINESS: 10 (stack-overflow)
+ // CHECK19: SCARINESS: 10 (null-deref)
+ // CHECK20: SCARINESS: 30 (wild-addr-write)
+ // CHECK21: SCARINESS: 20 (wild-addr-read)
+ // CHECK22: SCARINESS: 60 (wild-jump)
+ // CHECK23: SCARINESS: 10 (alloc-dealloc-mismatch)
+ // CHECK24: SCARINESS: 40 (bad-free)
+ // CHECK25: SCARINESS: 10 (memcpy-param-overlap)
+ // CHECK26: SCARINESS: 27 (4-byte-read-use-after-poison)
+ }
+}