Add new interceptors: strlcpy(3) and strlcat(3)

Summary:
NetBSD ships with strlcpy(3) and strlcat(3), a safe
replacement of strcpy(3) and strcat(3).

Hide both functions under SANITIZER_INTERCEPT_STRLCPY.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka

Reviewed By: vitalybuka

Subscribers: llvm-commits, kubamracek, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D42061

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@324034 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 104 insertions, 0 deletions

diff --git a/test/sanitizer_common/TestCases/NetBSD/strlcat.cc b/test/sanitizer_common/TestCases/NetBSD/strlcat.cc
new file mode 100644
index 000000000..ea504589e
--- /dev/null
+++ b/test/sanitizer_common/TestCases/NetBSD/strlcat.cc
@@ -0,0 +1,52 @@
+// RUN: %clangxx -O0 -g %s -o %t && %run %t
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void test1() {
+  const char src[] = "abc";
+  char dst[7] = {'x', 'y', 'z', 0};
+  size_t len;
+
+  len = strlcat(dst, src, sizeof(dst));
+  printf("%s %zu ", dst, len);
+}
+
+void test2() {
+  const char src[] = "abc";
+  char dst[7] = {0};
+  size_t len;
+
+  len = strlcat(dst, src, sizeof(dst));
+  printf("%s %zu ", dst, len);
+}
+
+void test3() {
+  const char src[] = "abc";
+  char dst[4] = {'x', 'y', 'z', 0};
+  size_t len;
+
+  len = strlcat(dst, src, sizeof(dst));
+  printf("%s %zu ", dst, len);
+}
+
+void test4() {
+  const char src[] = "";
+  char dst[4] = {'x', 'y', 'z', 0};
+  size_t len;
+
+  len = strlcat(dst, src, sizeof(dst));
+  printf("%s %zu\n", dst, len);
+}
+
+int main(void) {
+  test1();
+  test2();
+  test3();
+  test4();
+
+  // CHECK: xyzabc 6 abc 3 xyz 3 xyz 3
+
+  return 0;
+}
diff --git a/test/sanitizer_common/TestCases/NetBSD/strlcpy.cc b/test/sanitizer_common/TestCases/NetBSD/strlcpy.cc
new file mode 100644
index 000000000..996348602
--- /dev/null
+++ b/test/sanitizer_common/TestCases/NetBSD/strlcpy.cc
@@ -0,0 +1,52 @@
+// RUN: %clangxx -O0 -g %s -o %t && %run %t
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void test1() {
+  const char src[] = "abc";
+  char dst[7] = {'x', 'y', 'z', 0};
+  size_t len;
+
+  len = strlcpy(dst, src, sizeof(dst));
+  printf("%s %zu ", dst, len);
+}
+
+void test2() {
+  const char src[] = "abc";
+  char dst[7] = {0};
+  size_t len;
+
+  len = strlcat(dst, src, sizeof(dst));
+  printf("%s %zu ", dst, len);
+}
+
+void test3() {
+  const char src[] = "abc";
+  char dst[4] = {'x', 'y', 'z', 0};
+  size_t len;
+
+  len = strlcat(dst, src, sizeof(dst));
+  printf("%s %zu ", dst, len);
+}
+
+void test4() {
+  const char src[] = "";
+  char dst[4] = {'x', 'y', 'z', 0};
+  size_t len;
+
+  len = strlcat(dst, src, sizeof(dst));
+  printf("%s %zu\n", dst, len);
+}
+
+int main(void) {
+  test1();
+  test2();
+  test3();
+  test4();
+
+  // CHECK: abc 3 abc 3 xyz 3  0
+
+  return 0;
+}