1 files changed, 44 insertions, 0 deletions
diff --git a/test/asan/TestCases/invalid-pointer-pairs.cc b/test/asan/TestCases/invalid-pointer-pairs.cc
new file mode 100644
index 000000000000..b36e6cd9c10a
--- /dev/null
+++ b/test/asan/TestCases/invalid-pointer-pairs.cc
@@ -0,0 +1,44 @@
+// RUN: %clangxx_asan -O0 %s -o %t -mllvm -asan-detect-invalid-pointer-pair
+
+// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 %run %t k 2>&1 | FileCheck %s -check-prefix=OK -allow-empty
+// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 not %run %t g 2>&1 | FileCheck %s -check-prefix=CMP -check-prefix=ALL-ERRORS
+// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 not %run %t s 2>&1 | FileCheck %s -check-prefix=SUB -check-prefix=ALL-ERRORS
+// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 not %run %t f 2>&1 | FileCheck %s -check-prefix=FREE -check-prefix=ALL-ERRORS
+
+#include <assert.h>
+#include <stdlib.h>
+
+int f(char c, char *p, char *q) {
+  // ALL-ERRORS: ERROR: AddressSanitizer: invalid-pointer-pair
+  // [[PTR1:0x[0-9a-f]+]] [[PTR2:0x[0-9a-f]+]]
+  switch (c) {
+  case 'g':
+    // CMP: #{{[0-9]+ .*}} in f({{char, char\*, char\*|char,char \*,char \*}}) {{.*}}invalid-pointer-pairs.cc:[[@LINE+1]]:14
+    return p > q;
+  case 's':
+    // SUB: #{{[0-9]+ .*}} in f({{char, char\*, char\*|char,char \*,char \*}}) {{.*}}invalid-pointer-pairs.cc:[[@LINE+1]]:14
+    return p - q;
+  case 'k': {
+    // OK-NOT: ERROR
+    char *p2 = p + 20;
+    return p > p2;
+  }
+  case 'f': {
+    char *p3 = p + 20;
+    free(p);
+    // FREE: #{{[0-9]+ .*}} in f({{char, char\*, char\*|char,char \*,char \*}}) {{.*}}invalid-pointer-pairs.cc:[[@LINE+2]]:14
+    // FREE: freed by thread
+    return p < p3;
+  }
+  }
+  assert(0);
+}
+
+int main(int argc, char **argv) {
+  char *p = (char *)malloc(42);
+  char *q = (char *)malloc(42);
+  assert(argc >= 2);
+  f(argv[1][0], p, q);
+  free(p);
+  free(q);
+}