[ASan] Add tests of interceptor for printf_chk

Differential Revision: https://reviews.llvm.org/D40951

Change-Id: I7c32945659da4cf80e995370cb26fb063bb7930c

4 files changed, 133 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/asan/snprintf-fortify-1.c b/gcc/testsuite/gcc.dg/asan/snprintf-fortify-1.c
new file mode 100644
index 00000000000..b5e1a6e5101
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/asan/snprintf-fortify-1.c
@@ -0,0 +1,29 @@
+/* { dg-do run } */
+/* { dg-options "-D_FORTIFY_SOURCE=1 -w" } */
+/* { dg-skip-if "" { *-*-* } { "*" } { "-O1" } } */
+/* { dg-shouldfail "asan" } */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const char *
+__asan_default_options () {
+  return "fast_unwind_on_malloc=false";
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+int main(int argc, char **argv) {
+  char *short_buffer = (char*)malloc(3);
+  snprintf (short_buffer, 10, "%s_%s", "hello", "world"); /* BOOM */
+  return short_buffer[0];
+}
+/* { dg-output "    #1 0x\[0-9a-f\]+ +(in _*(interceptor_|wrap_|)__snprintf_chk|\[(\])\[^\n\r]*(\n|\r\n|\r)" } */
+
diff --git a/gcc/testsuite/gcc.dg/asan/sprintf-fortify-1.c b/gcc/testsuite/gcc.dg/asan/sprintf-fortify-1.c
new file mode 100644
index 00000000000..86fed28e373
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/asan/sprintf-fortify-1.c
@@ -0,0 +1,29 @@
+/* { dg-do run } */
+/* { dg-options "-D_FORTIFY_SOURCE=1 -w" } */
+/* { dg-skip-if "" { *-*-* } { "*" } { "-O1" } } */
+/* { dg-shouldfail "asan" } */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const char *
+__asan_default_options () {
+  return "fast_unwind_on_malloc=false";
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+int main(int argc, char **argv) {
+  char *short_buffer = (char*)malloc(3);
+  sprintf (short_buffer, "%s_%s", "hello", "world"); /* BOOM */
+  return short_buffer[0];
+}
+/* { dg-output "    #1 0x\[0-9a-f\]+ +(in _*(interceptor_|wrap_|)__sprintf_chk|\[(\])\[^\n\r]*(\n|\r\n|\r)" } */
+
diff --git a/gcc/testsuite/gcc.dg/asan/vsnprintf-fortify-1.c b/gcc/testsuite/gcc.dg/asan/vsnprintf-fortify-1.c
new file mode 100644
index 00000000000..711c31f84e8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/asan/vsnprintf-fortify-1.c
@@ -0,0 +1,38 @@
+/* { dg-do run } */
+/* { dg-options "-D_FORTIFY_SOURCE=1 -w" } */
+/* { dg-skip-if "" { *-*-* } { "*" } { "-O1" } } */
+/* { dg-shouldfail "asan" } */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const char *
+__asan_default_options () {
+  return "fast_unwind_on_malloc=false";
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+__attribute__((noinline, noclone))
+char foo (const char *format, ...) {
+  char *str = (char *) malloc (1);
+  va_list ap;
+  va_start (ap, format);
+  vsnprintf (str, 10, format, ap);
+  va_end (ap);
+  return str[1];
+}
+
+int main(int argc, char **argv) {
+  return foo ("%s_%s", "hello", "world");
+}
+/* { dg-output "    #0 0x\[0-9a-f\]+ +(in _*(interceptor_|wrap_|)__vsnprintf_chk|\[(\])\[^\n\r]*(\n|\r\n|\r)" } */
+
diff --git a/gcc/testsuite/gcc.dg/asan/vsprintf-fortify-1.c b/gcc/testsuite/gcc.dg/asan/vsprintf-fortify-1.c
new file mode 100644
index 00000000000..d14f38fff75
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/asan/vsprintf-fortify-1.c
@@ -0,0 +1,37 @@
+/* { dg-do run } */
+/* { dg-options "-D_FORTIFY_SOURCE=1 -w" } */
+/* { dg-skip-if "" { *-*-* } { "*" } { "-O1" } } */
+/* { dg-shouldfail "asan" } */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const char *
+__asan_default_options () {
+  return "fast_unwind_on_malloc=false";
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+char foo (const char *format, ...) {
+  char *str = (char *) malloc (1);
+  va_list ap;
+  va_start (ap, format);
+  vsprintf (str, format, ap);
+  va_end (ap);
+  return str[1];
+}
+
+int main(int argc, char **argv) {
+  return foo ("%s_%s", "hello", "world");
+}
+/* { dg-output "    #0 0x\[0-9a-f\]+ +(in _*(interceptor_|wrap_|)__vsprintf_chk|\[(\])\[^\n\r]*(\n|\r\n|\r)" } */
+