Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/asan/TestCases/strcasestr_strict.c

@@ -0,0 +1,28 @@
+// Test strict_string_checks option in strcasestr function
+// RUN: %clang_asan %s -o %t && %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+
+// There's no interceptor for strcasestr on Windows
+// XFAIL: win32
+
+#define _GNU_SOURCE
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char **argv) {
+  size_t size = 100;
+  char *s1 = (char*)malloc(size);
+  char *s2 = (char*)malloc(size);
+  memset(s1, 'o', size);
+  memset(s2, 'O', size);
+  s2[size - 1]='\0';
+  char* r = strcasestr(s1, s2);
+  // CHECK: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
+  // CHECK: READ of size 101
+  assert(r == s1);
+  free(s1);
+  free(s2);
+  return 0;
+}